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FINAL REPORT

COMPUTERIZED GEOGRAPHIC INFORMATION SYSTEM

UPPER SUSITNA

SUSITNA RIVER BASIN, ALASKA

ESRI380 New York StreetRedlands, California 92373

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CH-137

FINAL REPORT

COMPUTERIZED GEOGRAPHIC INFORMATION SYSTEM

UPPER SUSITNA

SUSITNA RIVER BASIN t ALASKA

Prepared for:USDA Forest Service·

Prepared by:Environm~ta1 Systems Research Institute

380 New York StreetRedlands. California 92373

March 1983

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Table of Contents

Introduction

Study Area Description

Manuscript Map Creation and Automation

Computer Maps and Models

a. Introduction

b. Model Outlines

Appendix A - Data Calssification and Coding

Appendix B - Data Code Descriptions

Appendix C - Grid Multi-variable File

Appendix D - Vegetation Statistics

Appendix E - Grid Map Legends and Statistics

Page

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2

9

12

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14

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INTRODUCTION

Environmental Systems Research Institute (ESRI) has developed an

Automated Geographic Information System (GIS) and conducted a systematic

land capability/suitability analysis for the Susitna River Basin in south

central Alaska. This effort was sponsored by a number of agencies,

including the National Aeronautics and Space Administration (NASA~, the

·U.S. Department of Agriculture (USDA) and the Alaska State Department of·

Natural Resources (ADNR). It was carried out under a number of contracts.

The first contract, which provided coverage for the Willow Subbasin, was

described in detail in a final report entitled, Computerized Geographic

Information System: Willow Subbasin, Susitna Basin, Alaska (February 1981).

The next effort, which 'provided coverage for the Talkeetna and Beluga

Subbasin was described in a final report entitled, Computerized Geo&raphic

Information System: Talkeetna and Beluga Subbasins, Susitna River Basin,

Alaska (November 1982). The most recent effort, in which the upland

margins of the Susitna Basin Were mapped and automated, is described in

this report. The .work for the Upper Susitna Subbasin was completed under

~ontract 53-0120-1-oP003 with the USDA Forest Service.

Unlike the two previous reports, this report will not describe in

detail the methods and processes involved in the creation of an automated

GIS but will center mainly on describing the differences between the Upper

Susitna study and the three previous studies. Please refer to either of

the two previous reports for a more in-depth description of the processes

involved.

[ CH-137 -1-

STUDY AREA DESCRIPTION

The Susitna River Basin comprises an area of approximatel¥ 10,000

square miles. The regional map following this section illustrates the

general location and configuration of the Susitna Basin as well as the

major subbasins within it. The Willow Subbasin, comprising an area of

approximately 1,600 square miles, is located in the So~theast. The

Talkee.tna Subbasin, comprising an area of some 3,200 square miles is

located in the center. The Beluga Subbasin, extending over approximately

2,300 square miles, is located in the West. As indicated previously, the

Talkeetna and Beluga Subbasins were each mapped under two ··separate

contracts. The boundaries of these contract areas, as well as the ESRI

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location of the area mapped and automated as part of the effort in Upper

Susitna Basin project number, are illustrated on the accompanying map. The

[Susitna is shown in the Northeast section of the Susitna Basin. It covers

approximately 3,700 square miles and is divided into two separate areas in

this report. The larger area is referred to as "areas A,B,D & E", and the

smaller area is called "area C".

The Upper Susitna Subbasin is contained within 33 map modules at a

scale of 1:63,360 which correspond to the United States Geological Survey

15 minute quadrangle series as shown on the page following the regional

map. A set of basemaps were formatted on translucent mylar and 4 tic marks

were placed on each corner of each base map to ensure accurate and

consistent registration. A tic numbering scheme was developed for the

entire subbasin. The modules were numbered using the previous Susitna

Basin Module Numbering System.

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Following the study area maps on the next pages. the structure of the

base maps, the module numbers, the location and numbering of the tics, and

their geographic coordinates are identified.

CH-137 -3-

\Nillow, Talkeetna ,. Beluga, Susitna Subbasins

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MCKINLEY

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Upper Susitna

Upper, Central & Lower Be/~ga

·Upper & Lower Talkeetna

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P..roject Numbers

t..2.. 3 ).s. 6 •8

.Corresponding .Susitna Basin

I Willow Subbs.'n

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AREA C

INDEX TO 15' USGS TOPOGRAPHICAL MAPS

UPPER SUSITNA SUBBASIN, SUSITNA BASIN, ALASKA

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ALKEETNA MTNS

NCHORAGE

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UPPER SUSITNA SUBBASIN - AREAS 'A,B,D & E'BASEMAPS MODULE NUMBERS AND TICS

I B-5 B-4

I (525) (524) ."

20 21 22 23

A-6 A-5 A·~"-4

..(516) (515) (514)

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76. ?<; ?f; ?7 HEALY- --..

D...;6 D-5

(346) (345)

29 30 31 32 33

C-l C-6 t-5 C-4 C-3

(131) (336) (335) (334) (333)

35 36 37 38 39

B-6 B-5 . B-4 B-3

(326) (325) (324) (323)

-40 41 42 43 44

A-6 A-5 A-4 A-3

(316) (315) (314) (313)

TNA 45 46 47 48 49 50 51 52 T_.D-8 D-7 D-6 D-5 A

(048) (047) (046) (045)

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34

TALKEE

MT. MCKINLE

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[UPPER SUSITNA SUBBASIN - 'AREAS A,B,D & E' - TICS

[6,000,000 Subtracted from Northing

TIC LATITUDE, LONGITUDE, NORTHING, EASTING, ZONE SPHEROIDID D M S D M S METERS METERS NO CODE

[ 17 63 30 0.000 149 30 0.000 543532.3 375558.0 6 018 63 30 0.000 149 0 0.000 542657.4 400439.5 6 019 63 30 0.000 148 30 0.000 541977.0 425325.7 6 0

[ 20 63 15 0.000 150 0 0.000 516768.1 349378.1 6 021 63 15 0.000 149 30 0.000 515691.7 374471.3 6 022 63 15 0.000 149 0 0.000 514811.1 399570.2 6 0

L 23 63 15 0.000 148 30 0.000 514126.2 424673.7 6 024 63 0 0.000 150 0 0.000 488935.2 348077.0 6 025 63 0 0.000 149 30 0.000 487851.9 373387.1 6 0

[26 63 0 0.000 149 0 '0.000 486965.7 3913702.9 6 027 63 0 0.000 . 148 30 0.000 486276.4 424023.2 6 028 62 45 0.000 150 30 0.000 462391.3 321259.1 6 .029 62 45 0.000 .150 0 0.000 461103.0 346778.8 6 0

E 30 62 45 0.000 149 30 0.000 460013.0 372305.3 6 031 62 45 0.000 149 0 0.000 459121.1 397837.5 6 032 62 45 0.000 148 30 0.000 458427.5 423374.1 6 0

r 33 62 45 0.000 148 0 0.000 457932.1 448914.2 6 0L 34 62 30 0.000 150 30 0.000 434567.9 319747.9 6 0

35 62 30 0.000 150 0 0.000 433271.6 345483.6 6 0f~~ 36 62 30 0.000 149 30 0.000 . 432174.8 371226.0 6 aL: 37 62 30 0.000 149 0 0.000 431277-.5 396974.0 6 0

38 62 30 0.000 148 30 0.000 430579.6 422726.6 6 0. 39 62 30 0.000 148 0 0.000 430081.1 448482.5 6 0

~40 62 15 0.000 150 0 0.000 405441.0 344191.3 6 041 62 15 0.000 149 30 0.000 404337.5 370149.1 6 042 62 15 0.000 149 0 0.000 403434.7 396112.6 . 6 0

C43 62 15 0.000 148 30 0.000 402732.6 422080.5 6 044 62 15 0.000 148 0 0.000 402231.1 448051.8 6 045 62 0 0.000 150 0 0.000 377611.0 342902.0 6 0

C46 62 0 0.000 149 37 30.000 376759.6 362531.0 6 o·47 62 0 0.000 149 30 0.000 376501.0 369074.8 6 048 62 0 0.000 149 15 0.000 376021.7 3.82163.3 6 049 62' 0 0.000 149 0 0.000 375592.9 395253.1 6 0

5 50 62 0 0.000 148 52 30.000 375397.4 401798.5 6 051 62 0 0.000 148 30 0.000 374886.5 421435.9 6 052 62 0 0.000 148 0 0.000 374382.0 447622.1 6 0

[ 53 61 45 0.000 150 0 0.000 349781.9 341615.8 6 054 61 45 0.000 149 37 30.000 348925.4 361405.6 6 055 61 45 0.000 149 15 0.000 348183.2 381198.7 6 056 61 45 0.000 148 52 30.000 347555.2 400994.6 6 0

[ 57 61 45 0.000 148 30 0.000 347041.4 420792.9 6 0

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TALKEETNA MTNS.--.-

UPPER SUSITNA SUBBASIN - AREA 'c'BASEMAPS MODULE NUMBERS AND TICS

1 2 3 4

C-1 C-6 C-5

(331) (436) (435)

5 6 7 8

..B-6 B-5B-1

.' . ' ,

(321) (426) (425)

~, 10 11 12

A-I A-6 A-5.

(311) (416) (415)

13 14 15 16

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GULKANA

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~UiliUSCRIPT }~ - CREATION AND AUTOMATION

Manually drafted mylar.sheets, termed manuscript maps, were drawn for

each of the 33 map modules. Only one manuscript was created for the Upper

Susitna Subbasin. The data types encompassed by it are outlined below.

SUSITNA RIVER/BASINALASKA

DATA STRUCTURE AND CLASSIFICATION

~Uu~SCRIPT #1 - INTEGRATED TERRAIN UNIT MAPSLOPE (7 Classes)LANDFORM

Physiographic Division (8 Classes)Landform Type (74 Classes)

GENERAL GEOLOGYSurficial Geology (4 Classes)Bedrock Geology (28 Classes)Vegetation (41 Classes)

It should be noted that some Integrated Terrain Unit variables mapped

for the Willow, Talkeetna and Beluga subbasins were not mapped for the

Upper Susitna subbasin. Soils and Land Use are the most conspicuous of

these omissions. Also, it should be noted that the minimum resolution o£

the mapped data was 80 acres rather than 2 to 5 acres for the other

subbasins. In this report,. Appendix A contains the Data Classification

Code Structure, and Appendix B contains the Data code descriptions.

The Integrated Terrain Unit manuscript, manually drafted at the scale

of 1:63,360, was created through a process which involved spatial

integration as well as composition

The mapped data were automated by a process of x,y coordinate

f" digitizing. The initial data entry was accomplished through (PlOS)L

programs and routines, as was the editing process. The final x,y

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CH-137 -9-

coordinate fiies were supplied in the PIOS format. Two grid multivariable

files (MVFs) were also created and delivered, one for areas 'A, B., D & E' ,

and one for area 'C'. In this report, Appendix C describes the structure

and contents of the (~WFs).

Under the contract for the Upper Susitna area, special computer

processing of the ITUM files for all of the subbasins was effected. All of

the x,y coordin.ate data files for the Susitna Basin had been created using

ESRI PIOS software. The lTUM files for Willow, Talkeetna, and Beluga as.well as those for Upper Susitna were converted to an ARC format and were

used to do special mapping and analysis for each of the quadrangles in the

study area. In instances where two files created under different contracts

for the Willow, Talkeetna and Beuga Subbasins provided full coverage for a

_given quadrangle, the files were joined with true coordinate edge-match

being effected between them. Given differences in spatial resolution

between the data mapped for Upper Susitna and the other Subbasins, the

files for quadrangles covered by the Upper Susitna and one or more other

study areas were not merged. The resulting ARC files were used to provide

maps and statisti~s by quadrangle for each of the vegetation units in the

Basin. Appendix D illustrates the statistics developed for the Upper

Susitna Subbasin. The procedures for creating these and their associated

maps are outlined below:

- Convert PIOS ITUM polygon file to ARC.

- Clean File.

- Merge and Clean Adjacent File (Only for Willow, Talkeetna and Beluga

on quadrangles covering parts of more than one subbasin).

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- Add Vegetation Codes to Associated Polygons.

- Dissolve Unnecessary Lines.

- Produce Computer Plot of Vegetation ~olygon Units.

- Produce Statistics Report.

CH-137 -11-

COMPUTER MAPS AND MODELS

The computerized data files, composed of polygons, were used to create

plotter drawn ~aps of each module as well as to create two types of

parallel data files. One in the ARC/INFO format and two in a grid format.

The grid (MVFs) were used to create line printer maps. The following

computer maps illustrate some of the basic information coded into the GIS

produced for the Upper Susitna Subbasin~ One set of grid maps were created

for Areas 'A, B, D & E', and' one set of grid maps were created for area

COMPUTER MAPSBASIC AND INTERPRETED ENVIRONMENTAL CONDITIONS

Pen Plotter Maps (PIOS)Dropline of Vegetation (By Quad)

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LPen Plotter Maps (Arc)Vegetation Polygons and Areal Statistics (By Quad)

Map II123

Line Printer Maps (Grid by Sub-Study Area)SlopeRange SuitabilityForest Suitability

The grid (MVFs) were also used to evaluate and assess environmental

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Cconditions in relation to certain potential uses. The overall format of

these models generally follows those developed as part of the Willow,

Talkeetna and Beluga efforts, wherein ESRI stafff worked with

representatives from select State and Federal agencies in structuring the

overall flow of the analyses. From these models, the following computer

maps were produced.

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previous Susitna Basin reports are on the following pages.

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Hap It456789

COMPUTER MAPSMODELED ENVIRONMENTAL CONDITIONS

Line Printer,Haps (GRID by Study Area)Erosion HazardDense Urban PotentialLow Density Urban PotentialGeneral HabitatHoose HabitatRoad Suitability

Outlines of these models, using the same format described in the

Appendix E, the legends and statistics section, lists the output of

the grid models in acres and percentage of the total area for each category

r~ of each model for each subarea. Two models, the Dense Urban PotentialL

Model and the Low Density Urban Potential Model yielded identical results.

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Therefore, only one legend and statistics sheet (titled, CAPABILITY FOR

URBAN DEVELOPMENT), displays the output from both models for each sub-area.

[ CH-137 -13-

- CH-137

UPPER SUSITNA

HODEL OUTLINES

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HAP 1HODEL OUTLINEUPPER SUSITNAGENERAL SLOPE

Consideration

Slope Gradient

CH-137

Specific Data Class

0-3% Slope3-7% Slope7-12% Slope

12-20% Slope20-30% Slope30-45% Slope> 45% Slope

-15-.

Value(Incidence)

1234567

Value(Proximity)

HAP 2MODEL OUTLINEUPPER SUSITNARANGE SUITABILITY

Consideration

Primary Vegetation

Specific Data Class

Closed ForestConiferous Forest, White

Spruce, Short StandsDeciduous Forest, Mixed

Forest, Young StandsDeciduous Forest, Mixed

Forest, Medium-AgedStands

Coniferous Forest, WhiteSpruce, Tall Stands

Deciduous Forest, MixedForest, Old Stands

Cottonwood, Young StandsCottonwood, Medium-Aged

StandsCottonwood, Old Stands

Open Forest-WoodlandConiferous Forest, White

Spruce, Short StandsDeciduous Forest, Mixed

Forest, Medium-AgedStands

Coniferous Forest, WhiteSpruce, Tall Stands

Deciduous Forest, MixedForest, Old Stands

- Cottonwood, Medium-AgedStap.ds

Cottonwood, Old Stands

Value"(Incidence)

7

7

77

77

6

6

6

6

66

Value(Proximity)

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Closed Forest (Black SpruceMountain Hemlock)

Black Spruce, Short StrandsBlack Spruce, Tall StandsMountain Hemlock, ShJrt

StandsMountain Hemlock, Tall

Stands

Open Forest-Woodland(Black Spruce)

Black Spruce, Short Stands

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Consideration

Primary VegetationCont'd

Specific Data Class

Salt Water WetlandsSalt GrasslandLow ShrubTidal Marsh

Tall ShrubsAlderAlder-Willow

Low ShrubWillow Resin Birch

GrasslandUpland Grass

TundraSedge-GrassHerbaceousShrubMat and Cushion

Fresh Water WetlandsSphagnum-BogSagnum-Srub Bog

Cultural FeaturesCultural Influences

BarrenMud FlatsRock

Permanent Snow and IceSnowfieldGlacier

WaterLakes > 40 acresLakes > 10 10 acres < 40

acresStreams > 165 Ft Wide

< 600 FeetRivers > 1/8 Mile Wide

-17-

Value(Incidence)

4:44

33

3

1

2232

55

8

88

88

88

8

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Value(Proximity)

MODEL Su}~~TION RULES

Rank Category

1 Grassland2 Tundra3 Shrub4 Salt Water Wetlands5 Fresh Water Setlands6 Open Forests7 Closed Forests8 Non-Vegetated

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HODEl. OUTLINEUPPER SUSITNAFOREST SUITABILITY .

Consideration

Primary Vegetation

Specific Data Class

Closed ForestConiferous Forest, White

Spruce, Short StandsDeciduous Forest, Mixed

Forest, Young StandsDeciduous Forest, Mixed

Forest, Medium-AgedStands

Coniferous Forest, WhiteSpruce, Tall Stands

Deciduous Forest, MixedForest, Old Stands

Cottonwood, Young StandsCottonwood, Medium-Aged

StandsCottonwood, Old Stands

Open Forest-Woodland .Coniferous Forest, White

Spruce, Short Sta~ds

Deciduous Forest, MixedForest, Medium-AgedStands

Coniferous Forest, WhiteSpruce, Tall Stands

Deciduous Forest, MixedForest, Old Stands

Cottonwood, Medium-AgedStands

Cottonwood, Old Stands

Closed Forest (Black SpruceMountain Hemlock)

Black Spruce, Short StrandsBlack Spruce, Tall StandsMountain Hemlock, Short

StandsMountain Hemlock, Tall

Stands

Open Forest-Woodland(Black Spruce)

Black Spruce, Short Stands

Value(Incidence)

1

5

5

1

57

77

33

1

1

4

Value(Proximity)

[ -19-

Consideration

Primary VegetationCont'd

Specific Data Class

Salt Water WetlandsSalt GrasslandLow ShrubTidal Marsh

Tall ShrubsAlderAlder-Willow

Low ShrubWillow Resin Birch

GrasslandUpland Grass

TundraSedge-GrassHerbaceousShrubMat and Cushion

Fresh Water WetlandsSphagnum-BogSagnum....Srub llog

Cultural FeaturesCultural Influences

BarrenMud FlatsRock

Permanent Snow and IceSnowfieldClacier

WaterLakes > 40 acresLakes > 10 10 acres < 40

acresStreams > 165 Ft Wide

< 600 FeetRivers > 1/8 Mile Wide

-20-

Value(Incidence)

999

99

9

9

9999

99

9

99

99

99

9

9

Value(Proximity)

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MODEL SUMMATION RULES

Rank Category

1 Closed White Spruce,2 Open White Spruce3 Closed Black Spruce4 Open Black Spruce5 Closed Mixed Forest6 Open Mixed Forext7 Closed Cottonwood8 Open Cottonwood9 Non-Forest

Hemlock

-21-

}oIAP 4NODEL OUTLINEUPPER SUSITNAEROSION HAZARD

Consideration Specific Data Class

Soil Characteristics K Fac~or

Slope Gradient 0-3% Slope Gradient3-7%7-12%

12-20%20-30%30-45%

> 45%

NODEL SID1MATION RULES

Value(Incidence)

0.4

0.2450.7461. 783.606.34

10.7117.58

Value(Proximity)

K Factor values are multiplied to value for average slope gradient todetermine computed soil loss in tons per acre-year. Since the soils inthe study area are predoiminantly silt, a K value of 0.4 was used.

Va;lue

0-34-78-15

16-2526-4041-129

Ranking

1234567

Category.

Water0-3 Tons/Acre-Year = Low4-7 Tons/Acre-Year = Low/Noderate8-15 Tons/Acre-Year = Moderate16-25 Tons/Acre-Year = Moderate/High26-40 Tons/Acre-Year = HighGT 40 Tons/Acre-Year = Very High

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MAP 5HODEL OUTLINEUPPER SUSITNADENSE URBk~ POTENTIAL

Consideration Specific Data Class Value(Incidence)

Value(Proximity)

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Landform Type GlacialMoraine

End MoraineLateral MoraineMedial MoraineMoranial RidgeRogen.Morain~

Ground MoraineTill

Till~ UndifferentiatedDrumlin

Druml.in·~ DrumloidRock Drumlin, Drumloid

FluvioglacialOutwashAbandoned Outwash .ChannelRemnant Subglacial Stream

ValleyKame ComplexEskerCrevasse FillingSide Glacial Drainage

ChannelFlute

AeolianDuneDune and·Outwash

ComplexLittoral

Longshore BarLongshore Bar Within

Abandoned Coastline(Not Surveyed FloodZone) .

Longshore Bar.WithinAbandoned Coastline(Surveyed Flood Zone)

BeachBarrier SpitDelta

Delta-Floodplain WithinAbandoned Coastline(Not Survyed Flood Zone)

-23-

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·Value(Incidence)

Consideration

Landform TypeCont'd

Specific Data Class

Delta-Floodplain WithinAbandoned Coastline(Survyed Flood Zone)

Delta-Floodplain (NotSurveyed Flood Zone)

Delta-Floodplain(Surveyed Flood Zone)

Delta and Outwash ComplexTidal FlatCoastal Plain

FluvialActive ChannelRiver BarFloodplain

Active (No.t SurveyedFlood Zone)

Active (Surveyed Flood Zone)Abandoned (Not Surveyed

Flood Zone)Abandoned (Surveyed Flood

Zone)Alluvial PlainAlluvial Fan/ConeLacustrine Deposit-Mass Wasting-- ....-ColluviumTalusLandslide DepositRock GlacierMine Tailings

Tectonic UplifeUpland ValleyMountain SideslopeMountain" Ridgetop

WaterbodyIce and Snow

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Value(Proximity)

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Coniferous-Hemlock­Coniferous-Hemlock-TallDeciduous/Mixed-YoungDeciduous/Mixed-Medium Age

Vegetation Cover Closed ForestConiferous-White

ShortConiferous-White

TallConiferous-Black

ShortConiferous-Black

Tall

Spruc"e-I

Spruce-

Spruce-

Spruce-

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MODEL SUMMATION RULES

High Capability = All HModerate Capability 1 or more M not L or ULow Capability = 1 or more L not UUnsuited 1 or mor·e U

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Consideration

Vegetation CoverCont'd

Slope Gradient

Specific Data Class

Deciduous/Mixed-OldCottonwood-YoungCottonwood-Medium AgeCottonwood-Old

Open ForestConiferous-White Spruce­

ShortConiferous-White Spruce­

TallConiferous-Black Spruce-

ShortDeciduous/Mixed-MediUm AgeDeciduous/Mixed-OldCottonwood-Medium AgeCottonwood-Old

Non-ForestSalt Water WetlandTall ShrubsLow ShrubsGrasslandTundraFresh Water Wetland

Cultural FeaturesCultural Influences

BarrenPermanent Snow and Ice\.;Tater

Average Slope Gradient0-3%3-7%7-12%12-20%20-30%30-45%

> 45%

-25-

Value(Incidence)

MHHM

M

H

LHMHM

ULLMLU

11UUU

HHHMLLU

Value(Proximity)

MAP 6MODEL OUTLINEUPPER SUSITi~A

LOW DE~SITY URBAN POTENTIAL

[

[Consideration Specific Data Class Value

(Incidence)Value

(Proximity) ['Landform Type Glacial

MoraineEnd MoraineLateral MoraineMedial MoraineMoranial RidgeRagen MoraineGround Moraine

TillTill, Undifferentiated

DrumlinDrumlin, DrumloidRock Drumlin, Drumloid

FluvioglacialOutwashAbandoned Outwash ChannelRemnant Subglacial Stream

ValleyKame ComplexEskerCrevasse FillingSide Glacial Drainage

ChannelFlute

AeolianDuneDune and Outwash

ComplexLit'toral

Longshore BarLongshore Bar Within

Abandoned Coastline(Not Surveyed FloodZone)

Longshore Bar WithinAbandoned Coastline(Surveyed Flood Zone)

BeachBarrier SpitDelta

Delta-Floodplain WithinAbandoned Coastline(Not 'Survyed Flood Zone)

-'-26-

MMMMMMHMMMML

HH

LLLU

UU

L

L

U

L

UUUL

L

['

[[L

[

[

[

C

L[

L

Specific Data Class -Value(Incidence)

Delta-Floodplain WithinAbandoned Coastline(Survyed Flood Zone) U

Delta-Floodplain (NotSurveyed Flood Zone) U

Delta-Floodplain(Surveyed Flood Zone) U

Delta and Outwash Complex LTidal Flat UCoastal Plain M_

•

Value(Proximity)

L

H1-1LUU

M-

·LMMMH

H

MULUU

UHHR

M

UU

UUU

-27-

Closed ForestConiferous-White Spruc'e-

Short f

Coniferous-White Spruce­Tall

Coniferous-Black Spruce­Short

Coniferous-Black Spruce-Tall.

Coniferous-Bemlock- ShortConiferous~Hemlock-Tall

Deciduous/Mixed-YoungDeciduous/Mixed-Medium Age

FluvialActive ChannelRiver BarFloodplain

Active (Not SurveyedFlood Zone)

Active (Surveyed Flood Zone)Abandoned (Not Surveyed- Flood Zone)

Abandoned (Surveyed FloodZone)

Alluvial PlainAlluvial Fan/ConeLacustrine Deposit

l-1ass Wasting-------ColluviumTalusLandslide DepositRock GlacierMine Tailings

Tectonic UpliftUpland ValleyMountain SideslopeHountain-' Ridgetop -

WaterbodyIce and Snow

Vegetation Cover

Consideration

Landform TypeCont'd

('L

[

I'L

rL

[

lC

LCC[

Consideration

Vegetation CoverCont'd

Slope Gradient

HODEL SUMMATION RULES

High CapabilityModerate Capabil;tyLO\y CapabilityUnsuited

Specific Data Class

Deciduous/~xed-Old

Cottonwood-YoungCottonwood-Medium AgeCottonwood-Old

Open ForestConiferous-White Spruce­

ShortConiferous-White Spruce­

TallConiferous-Black Spruce-

Short:Deciduous/Mixed-Medium AgeDeciduous/Mixed-oldCottonwood-Medium AgeCottonwood-old

Non-ForestSalt Water WetlandTall ShrubsLow ShrubsGrasslandTundraFresh Water Wetland

Cultural FeaturesCultural Influences

BarrenPermanent Snow and IceWater

Average Slope Gradient0-3%3-7%7-12%12-20%20-30%30-45%

> 45%

= All H= 1 or more M not L or U= 1 or more L not U= 1 or more U

-28-

Value(Incidence)

M~

MM

M

H

LHMMM

ULLLLU

M:U­UU

HHHMLLU

Value(Proximity)

[L

[

[

[

Ll-~

-~

[

[IL

L

[

L[

[

[

[r'L,

rL

[

[

[

C

. MAP 7MODEL OUTLINEUPPER SUSITNAGENERAL HABITAT

Consideration

Primary Vegetation

Specific data Class

Closed ForestConiferous Forest, White

Spruce, Short StandsDeciduous Forest, Mixed

Forest, Young StandsDeciduous Forest, Mixed. Forest, Medium-Aged

StandsConiferous Forest, White

Spruce, Tall StandsDeciduous Forest, Mixed

Forest, Old StandsCottonwood, Young StandsCottonwood, Medium-Aged

StandsCottonwood, Old Stands

Open Forest-WoodlandConiferous Forest, White

Spruce, Short StandsDeciduous Forest, Mixed

Forest, Medium-AgedStands

Coniferous Forest, WhiteSpruce, Tall Stands

Deciduous Forest, MixedForest, Old Stands

Cottonwood, Medium-AgedStands

Cottonwood, Old Stands

Value(Incidence)

8

10·

5

8

510

1010

2

1

2

1

44

Value(proximity)

[

I'L

[

Closed Forest (Black SpruceMountain Hemlock)

Black Spruce, Short StrandsBlack Spruce, Tall StandsMountain Hemlock, Tall

Stands

Open Forest-Woodland(Black Spruce)

Black Spruce, Short Stands

-29-

88

8

11

MODEL SUMMATION RULES

MAPARanking Category

1 = Mixed Forest - Open2 = Conifer Forest - Open3 = Tall Shrub Alder-Willow4 7 Deciduous Forest - Open5 = Mixed Forest - Closed6 = Low Shrubs - Willow Resin Birch

-30-

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7 = Salt Water Wetland, Grassland, and Tidal Flats8 = Conifer Forest - Closed9 = Low Shrub Salt Water Wetland

10 = Deciduous Forest - Closed11 = Short Black Spruce - Open12 = Sphagnum Bog13 = Tall Shrub Alder14 = Grassland15 = Tundra - Special Consideration16 = Low Diversity/Capability17 = Lakes and Streams

[

[

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Lf~<-

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C[

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MAPBAggregatedRanking

12345

OriginalRanking

1715168-141-7

Category

Lakes and StreamsTundra Special ConsiderationLow Diversity/CapabilityModerate Diversity/CapabilityHigh Diversity/Capability

-31-

Value(Incidence)

HAP 8MODEL OUTLINEUPPER SUSITNAHOOSE F.ABITAT

Consideration

Primary Vegetation

Specific data C~ass

.Closed ForestConiferous Forest, White

Spruce, Shor~ StandsDeciduous Forest, Mixed

Forest, Young StandsDeciduous Fore~t, Mixed.

"Forest, Medium-Aged·Stands .

Coniferous Forest, WhiteSpruce, Tall Stands

Deciduous Forest, MixedForest, Old Stands·

Cottonwood, Young StandsCottonwood, Medium-Aged

StandsCottonwood, Old Stands

Open Forest-WoodlandConiferous Forest, White

Spruce, Short StandsDeciduous Forest, Mixed

Forest, Medium-AgedStands

Coniferous. Forest, WhiteSpruce, Tall Stands

Deciduous Forest, MixedForest, Old Stands

Cottonwood, Medium-AgedStands

Cottonwood, Old Stands

Closed Forest (Black SpruceMountain Hemlock)

Black Spruce, Short StrandsBlack Spruce, Tall StandsMountain Hemlock, Tall

Stands

Open Forest-Woodland(Black Spruce)

Black Spruce, Short Stands

-32-

1

1

1

1

1

1

11

1

1

1

1

31

11

1

3

Value(Proximity)

[

[

[

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[

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Cc-..c[

[

L

[

[

[

[

[

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cc

Consideration

PrimaryVegetationCont'd.

Specific Data Class Value Value(Incidence) (Proximity)

Salt Water WetlandsSalt Grassland 4Low Shrub 4Tidal Marsh 4

Tall ShrubsAlder 1Alder-Willow 1

Low ShrubWillow Resin Birch 2

GrasslandUpland .Grass 2

TundraSedge-Grass 3Herbaceous 2Shrub 2Mat and Cushion 3

Fresh Water WetlandsSphagnum-Bog 4Sagnum-Srub Bog, 2

Cultural FeaturesCultural Influences 4

BarrenMud Flats 4Rock 4

Permanent Snow and IceSnowfield 4.Glacier 4

Water 5

[

l

('L

MODEL SUMMATION RULES

Value 1 = Level 1 MOD/HIGH Winter Range,LOW/HIGH S,S,F Range

Value 2 = Level 2 No Winter RangeMOD/HIGH S,S,F Range

Value 3 Level 3 NO/LOW Winter RangeLOW/MOD S,S,F Range

Value 4 = Level 4 Vegetated types not generallyused by moose

Value 5 = Level 5 Water bodies

-33-

HAP 9MODEL OUTLINEUPPER~.l!SITNA .ROAD SUITABILI~

Consideration

Landform Type(Rating I to 10~

I is best)

Specific Data Class

GlacialMoraineTillDrumlin

Drumlin/DrumloidRock Drumlin

FluvioglacialOutwashAbandoned Outwash ChannelRemnant Subglacial

Stream ValleyKame ComplexEskerCrevasse Filling.Side Glacial Drainage

ChannelFlute

AeolianDuneDune and Outwash Complex

LittoralLongshore BarBeachBarrier SpitDeltaTidal FlatCoastal Plain

FluvialActive ChannelRiver BarFloodplain

ActiveAbandoned

Alluvial PlainAlluvial Fan/ConeLacustrine Deposit

Mass HastingColluviumTalusLandslide DepositRock Glacier

-34-

Value(Incidence)

II

I7

33

42I1

33

73 .

888999

810

104329

10101010

Value(Proximity)

[

[

r[

r~

[

[

E[L

lL[

LL[

[

l

[

[

[

[

r~

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[

5C[

[

[

[r~

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[

Consideration

Landform TypeCont'd

Slope

Vegetation Cover(Rating is 1 to 150,1 is best)

Specific Data Class Value(Incidence)

Mine Tailings 10Tectonic Uplift

Upland Valley 4Mountain Sideslope 10Mountain Ridgetop 10

Waterbody 10Ice and Snow 10

Slope Gradient0-3% 13-7% 57-12% 15

12-20% 2520-30% 4030-45% 50

> 45% 60

Closed Forest 5Open Forest - Woodland 4Closed Forest (Black Spruce,

Mountain Hemlock) 25Open Forest Woodland

(Black Spruce) 70Non Forested

Salt Water WetlandGrassland 80Low Shrub 80nd~.r~ 80

Tall ShrubAlder 3Alder-Willow 3

Low ShrubWillow-Resin Birch 2

GrasslandGrassland 1

TundraSedge-Grass 20Herbaceous 15Sh~ub 20Mat-Cushion 20

FreshwaterSphagnum Bog 70Shagnum Shrub Bog 70

CulturalCultural Influence 1

BarrenMud Flats 80Rock 80

SnowSnow Field 100Glacier laO

WaterLake GE 40 Acres 150

-35-

Value(Proximity)

Consideration

Vegetation CoverCont'd

Hydrology

MODEL Su}~TION RULES

High SuitabilityModerate/HighModerateLowVery LowExtremely Low

Specific Data Class

Lake GE 10 Acres ,andLT 40 Acres

Stream or River GE 165Feet Wide and LT 660Feet Wide

River GE 600 Feet Wide

Stream Order 1-8Stream or River LT 165·Feet Wide

0-1011-1516-3031-6061-100GT 100

-36-

Value(Incidence)

150

150150

100

Value(Proximity)

[

['

[

['

[

r·L~

r"-----'

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[

L[

LC[

f"

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APPENDIX A

UPPER SUSITNA

DATA CLASSIFIC4TION AND CODING

A-I

[

[

[

[

[

[

[

PLj

rL

[

6GCG[

LLL

UPPER SUSITNAMANUSCRIPT 111

INTEGRATED TERRAIN UNIT MAPDATA CLASSIFICATION AND CODING

SLOPE

Slope Gradient (Column 1)

1 = 0-3%2 = 3-7%3 = 7-12%4 = 12-20%5 = 20-30%6 = 30-45%7 = Greater than 45%

LANDFORM

Physiographic Division (Column 2)

1 = Mountain2 = Hill3 = Slope4 = Plateau5 = Valley6 = Coastal Lowlands7 = Glacier8 = Waterbody

Landform Type (Column 3, 4 and 5)

GLACIAL

no = MoraineIII = End Moraine112 = Lateral Moraine113 = Medial Moraine114 = Morainal Ridge115 = Rogen Moraine116 = Ground Moraine

120 = Till121 = Till, Undifferentiated

r- 130 DrumlinL

CH-139' A-2

132 = Rock Drumlin, Drumlinoid [FLUVIOGLACIAL

LITTOP.AL

AEOLIA~

210 Out,V'ash220 - Abandoned Outwash Channel230 Remnant Subglacial Streara Valley240 = Kame Complex250 = Esker260 Crevasse Filling270 = Side Glacial Drainage Channels280 = Flute

EDuneDune and Outwash Complex

310 =311

410 =411412

420

430

440 =441

442443444445

Longshore BarLongshore Bar Within Abandoned Coastline (Not Surveyed Flood Zone)Longshore Bar Within Abandoned Coastline (Surveyed Flood Zone)

Beach

Barrier Spit

DeltaDelta-Floodplain Within Abandoned Coastline (Not Surveyed FloodZone)Delta-Floodplain Within Abandoned Coastline (Surveyed Flood Zone)Delta-Floodplain (Not Surveyed Flood Zone)Delta-Floodplain (Surveyed Flood Zone)Delta and Outwash Complex

['L

[

[

CFb

FLUVIAL

450 = Tidal Flat451 Tidal Flat ~Vithin Abandoned Coas tline (Not Surveyed Flood Zone)452 Tidal Flat Within Abandoned Coastline (Surveyed Flood Zone)

460 = Coastal Plain

510 =511 =512

Active Ch~nnel

Active Channel (Not Surveyed Flood Zone)Active Channel (Surveyed Flood Zone)

c[

L520521

River BarRiver Bar (Not Surveyed Flood Zone)

I :L

CH-E9A-3 L

[

[

620 = Talus

r"1 630 = Landslide DepositsL

[

[

[

r'L4

[

6c[

G[

522 River Bar (Surveyed Flood Zone)

530 Floodplain531 Active (Not Surveyed Flood Zone)532 Active (Surveyed Flood Zone)

.533 = Abandoned (Not Surveyed Flood Zone)534 = Abandoned (Surveyed Flood Zone)

550 = Alluvial Plain

560 Alluvial Fan/Cone

570 Lacustrine Deposits

IvIASS WASTING

610 Colluvium

640 = Rock Glacier

650 Mine Tailings

TECTONIC UPLIFT

710 = Upland' Valley

720 = Mountain Sides lope

730 = Mountain Ridgetop

~·7ATERBODY

810 = Sea

820 Lagoon821 Lagoon Within Abandoned Coastline (Not Surveyed Flood Zone)822 Lagoon Within Abandoned Coastline (Surveyed Flood Zone)

[r­L

LL

830 Lake831 Lake832 Lake833 = Lake834 Lake835 Lake

840 River

CH-139

Within Abandoned Coastline (Not Surveyed Flood Zone)Within Abandoned Coastline (Surveyed Flood Zone)in Active Floodplain (Not Surveyed Flood Zone)in Active Floodplain (Surveyed Flood Zone)

A-4

841842

River (Not Surveyed Flood Zone)River (Surveyed Flood Zone)

[

[

[ICE ANr5' SNOH

910 = Glacier

920 Permanent Snowfield

GENERAL GEOLOGY

Surficial Geology (Column 6)

1 = No Surficial Depositis2 = Surficial Deposits3 = W'aterbody4 = Glacier

Bedrock Geology (Columns 7 and 8)

01 = Tertiary, Undifferentiated (Tu, Qag)02 Tertiary Intrusive (Ti)03 = Tsadaka Formation (Tt)04 = Arkose Ridge Formation (Tar).05 = Chickaloon Formation (Tc)06 =.Tertiary/Cretaceous Plutonic (TKgd)07 = Paleozoic/Jurassic/Cretaceous, Undifferentiated Sediments and

Metasediments (PKJu)08 Mesozoic/Paleozoic Metamorphosed Schist (MPs)09 Waterbody10 Tyonek Formation, Sedimentary Rock, Primary Sandstone (Tts)11 Mesozoic Marine Sedimentary Rocks, Undivided (including Graywacks,

shale, siltstone, argillite, and chert) (Kju)12 = Metamorphosed Volcanic Rocks (Pzv)13 = Undifferentiated Volcanic Rocks (Tv)14 Intrusive Igneous Rock, Granite or Granodiorite (Ruth Pluton) (Tror)15 Sterling Formation, Sedimentary Roc1~ (Tps)16 = Inrusive Igneous Rock, Granite or Granodiorite (Kahiltna Pluton)

(Tmk)17 = Undifferentiated Sedimentary Rocks (Tsu)18 = Glacier19 = Kenai Formation, Sandstone, Conglomerate, Siltstone, Claystone (Tku,

Tkm, Tkl)20 Landslide Deposits (Qls)21 Jurassic, Plutonic and Metamorphic Rocks Undifferentiated (Jtr, Jg,

Jm, Jp, Jpm)22 Triassic-Jurassic Volcanic and Sedimentary Rocks Undivided (Jtra,

Jtrs)23 = Marble (PIs)

r~

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24 Gra~.acke, Argillite, Shale and other Sedimentary Rocks (DS)25 Quaternary-Tertiary Volcanics and shallow intrusives26 Tertiary Continental Sedimentary Rocks27 = Mesozoic-Paleozoic Volcanics28 = NC'sozoic-Paleozoic Plutonics and shallow intrusives29 Paleozoic Metasedimentary and Metavolcanics Undifferentiated

99 = Waterbody

NO DATA (Column~ 9-27)

0000000000000000000 = NO DATA

VEGETATION

Primary Vegetation (Columns 28 and 29)Secondary Vegetation (Columns 30 and 31)Tertiary Vegetation (Columns 32 and 33)Quaternary Vegetation (Columns 34 and 35)

FOREST AND WOODLAND

Closed Forest

21 = Coniferous Forest, White Spruce, Short Stands22 = Deciduous Forest, Mixed Forest, Young Stands24 Deciduous Forest, Mixed Forest, Medium-Aged Stands25 Coniferous Forest, White Spruce, Tall Stands26 Deciduous Forest, Mixed Forest, Old Stands27 Cottonwood, Young Stands28 = Cottom-TOod, Medium-Aged Stands29 Cottonwood, Old Stands

Open Forest-Woodland

[

313233343536 =

Coniferous Forest, White Spruce, Short StandsDeciduous Forest, Mixed Forest, Medium-Aged StandsConiferous Forest, White Spruce, Tall StandsDeciduous Forest, Mixed Forest, Old StandsCottonwood, Medium-Aged StandsCottonwood, Old Stands

f~ Closed Forest (Black Spruce Mountain Hemlock)

rL

4142 =45 =46

Black Spruce, Short StandsBlack Spruce, Tall StandsMountain Hemlock, Short StandsMountain Hemlock, Tall Stands

CH-139 A-6

[

Low Shrub

NON FORESTED

Sal t Water Ivetlands

Tall Shrtibs

f~

r~

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f

·,

-,

Lr\.~

AlderAlder-Willow (streamsi4e veg.)

43 = Black Spruce, Short Stands

Open Forest-Woodland (Black Spruce)

50 = Salt Grassland51 = Low Shrub52 = Tidal Marsh

6061 =

62 = Willow Resin Birch

Grassland

Tundra

Cultural Features

Freshwater Wetlands

Barren

[

[

[

CL[

L

Sphagnum BogSphagnum-Shrub Bog

Sedge-GrassHerbaceousShrubMat and Cushion

64 ­65 =66 =67

70 = Cultural Influences

63 = Upland Grass

6869 =

80 = Hud Flats81 Rock

Permanent Snow and Ice

82 Snowfield83 Glacier

CH-139 A-7

[

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Water

91 = Lakes greater than 40 ac. (census water)92 Lakes at least 10 ac., but less than 40 ac.96 Streams and Rivers at least 165 feet wide, but less than 500 feet

wide97 Rivers greater than 1/8 mile (census water)

CH-139 A-8

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APPENDIX B

DATA CODE DESCRIPTIONS

B-1

[

[

[

[

UPPER SUSITNAMANUSCRIPT III

INTEGRATED TERRAIN UNIT MAPDATA CODE DESCRIPTIONS

Slope is defined as the angle which any part of the earth's surface

slope was mapped by percent s~ope class. The assigned value represents the

makes with a horizontal datum. For the Uppe~ Susitna resource inventory~

SLOPE

average percent slope within the terrain unit polygon. Some variation will

~ occur within each polygon because of minor surface fluctuations. The sameL ...J

r:[

[

slope classes were chosen to be mapped on the terrain units that were mapped

r~L

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CC

C[

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as phase breaks in SCS soil surveys.

0 - 3% = Nearly level

3 - 7% = Undulating, gently sloping

7- 12% = Rolling

12-20% = Hilly

20-30% Moderately Steep

30-45% = Steep

45% and greater = Extremely Steep

Percent Slope Angle of Inclination Slope Ratio Gradient (feet per mile)

3 1 43' 33.3:1 158.4

7 4 l' 14.3:1 369.6

12 6 53' 8.3:1 633.6

20 11 28' 5:1 1056

30 17 11' 3.3:1 1584

45 25 41' 2.2:1 2376

f'L

L CH-157 B-2

LMIDFOP.MS

Landforms are the distinctive configurations of the land surface and are

environmentally significant because they influence the place to place

variation in ecological factors such as water availability and exposure to

radiant solor energy.

PHYSIOGRAPHIC DIVISION

Physiographic division is a type of landform classification which

divides the land surface into broad major categories.

1 = Mountain: A sloping mass of land considerably higher than its

surroundings. Its sUtlIllit area is smaller than its base and has an

elevation over 1500 feet.

2 = Hill: An elevated portion of the earth's surface which has an undulating

to moderately steep sloping surface. Hills are generally found along the

foot of mountainous areas and have elevations less than 1500 ft.

3 = Slope: A moderately steep to steep portion of the earth's surface

generally located between valley and mountain or hill and mountain

physiographic divisions.

[

[

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c4

S

Plateau: An elevated tract of comparatively flat or level land.

Valley: A relatively flat depression in the earth's surface formed

either by erosion or by structural processes.

6 = Coastal Lowland: Regional features of low relief bounded seaward by the

shore and landward by highlands.

7 = Glacier: A extensive slowly flowing body of ice formed on land by snow

transformed into ice by pressure recrystallization of the snow.

[

f'L

eH-IS7 B-3 L

[

r8 Uaterbody: Any accumulation of water which occurs on the earth's

surface. For the Upper Susitna Resource Inventory, only waterbodies over

80 acres were mapped.

[

LANDFORM TYPE

A landform type is any element of the landscape characterized by a

distinctive surface expression, internal structure, or both, and sufficiently

conspicuous to be included in a physiographic description. Physiographic

divisions are subdivided by the more detailed landform type classification.

Glacial[rL

[

llO

III

112

Glacial landforms are created or deposited by a glacier.

Moraine: An accumulation of glacial till (glacial sediments ranging in

size rom huge bou~ders to fine dust) deposited chiefly by direct

glacial action. The resul'ting landforms are undulating, poorly

drained, and exhibit a topography which is independent of'control by

the surface on which the moraine lies.

End Moraine: A moraine marking the terminal position of a valley

glacier.

Lateral Moraine: A low long ridge-like moraine deposited on or near

the side margin of a mountain glacier.

[

[

113 Medial Moraine: An enlongated moraine carried in or upon the middle of

a valley glacier and parallel to its side, formed by the merging of

adjacent lateral moraines below the junction of two coalescing valley

glaciers.

LL

f'L

[

114

CH-157

Morainal Ridge: A pronounced mound or ridge of till within a moraine.

B-4

115

116

Rogen Moraine: A"ridge-like moraine transverse to the direction of

glacial movement formed beneath the glacier in zones of shearing ice

s~e~.

Ground Moraine: A fairly even thin layer of till deposited directly

[

[

from a glacier and. having an undulating surface.

120 = Till: Unsorted, unstratified sediments carried and deposited by a

glacier. It is composed of rock fragments of all sizes and types".

121 - Till, Undifferentiated: A thick layer of till deposited directly from

a glacier onto the earth's surface. Till often completely burys pre-

existing topography giving rise to nearly flat level surfaces. The

composition of the till, both rock type and fragment size, is

unspecified.

130 = Drumlin: Till molded by glacial ice into low, enlongated hills with

the longer axis parallel to the direction of .the glacial movement.

l~

FL

[

131 Drumlin-Drumloid: This landform class is a combination of druolin and

drumloid. A drumlin is till molded by glacial ice into low, enlongatcd

hills with the longer axis parallel to the direction of the glacial

movement. A drumloid is similar to a drumlin except that its shape is

irregular.

[

132 = Rock Drumlin-Drumlinoid: This landform class is a combination of rock

drumlin and drumlinoid. Rock drumlin is a smooth, steamlined hill that

\ .resembles a drumlin, but has a bedrock core usually veneered with a

thin layer of till formed by glacial erosion. A drumlinoid is an

irregularly shaped rock drumlin.

B-5

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Fluvioglucial

Fluvioglacial landforms are formed or deposited by glacial meltwater.

2JO = Outwash: Stratified glacial debris, mainly sand and gravel, deposited

by glacial meltwater beyond the end moraine or the margin of an active

glacier.

220 = Abandoned Outwash Channel: Outwash deposited by a remnant stream

channel which once emerged from a glacier, braided in form, now often

covered by wetland and associated organic deposits.

230 Remnant Subglacial Stream Valey: A stream valley formed by a stream

rL

l

which flowed beneath the once overlying glacier.

240 = Kame Complex: Mounds, hills, or hummocky areas composed of poorly

sorted sands and gravels deposited by glacial meltwater in depressions

in the ice or fan deposits formed against the edge of an ice sheet. As

the glacier melts their form is modified by slumping and s~ttling.

250 Esker: Low, narrow, sinuous ridges of poorly sorted sands and gravel

deposited by streams that ran on, within, or beneath a glacier.

E[

[

260 = Crevasse Filling: Type of kame that is ridge-like. They are composed

of poorly sorted sand and gravels, and are similar in appearance to

eskers except that they are smaller and shorter and may extend in any

direction to the flow of the glacier (where eskers usually parallel the

glacial flow).

270 = Side Glacial Drainage Channels: Drainage channels cut into the

hillside along the margins of a glacier by stream.

CH-l57

I ~

L

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280 Flute: Small, longitudinal, shallow channels between small parallel

ridges, found on moraines.

B-6

Aeolian

Aeolian landforms are shaped or formed by the wind.

310 = Dune: A ridge of sand formed by and constantly changed by wind.

311 = Dune and Outwash Complex: A dune which formed on outwash.

Littoral

Littoral landforms are situated on or near a coast.

410 = ~ongshore Bar: A low, elongated sand ridge, built chiefly by wave

action, occurring at some distance from and extending generally

parallel with the shoreline.

Abandoned Coastline: Narks the locations of past ocean levels. They

are formed either by a reduction in the ocean level or an emergence of

the coast.

Survey Flood Zone: Areas which have been surveyed by the Army Corps of

Engineers, and established to be flood prone.

Not Surveyed Flood Zone: Areas established by Aerial Information

System CAIS) to be flood prone by using the imagery, topographic maps,

soil maps, and soil descriptions.

411 = Longshore Bar Within Abandoned Coastline, Not surveyed Flood Zone:

This longshore bar is located on the seaward side of the abandoned

coastline and has been established to be flood prone by AlS.

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412 Longshore Bar Within Abandoned Coastline, Surveyed Flood Zone: A

longsore bar located on the seaward side of the abandoned coastline

which has been established to be flood prone by the Army Corps of

Engineers •.

B-7

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420 Beach: The coastal zone extending from the low tide limit to a place

where t~ere is a definite change in material or physiographic form. It

must at least partly consist of unconsolidated material like sand,

cobble, or boulders.

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430 - Barrier Spit: A type of longshore bar connected at one end to the

mainland.

440 = Delta: A low, nealy flat accumulation of sediments deposited where

rivers empty into lakes or ocean.

441 = Delta-Flood Plain Within Abandoned Coastline, Not Surveyed Flood Zone:

A type of delta within the active flood plain of a river and located on

the seaward side' of the abandoned coas·tline. It has also been

established to be flood prone by AIS.

442 = Delta-Flood Plain Within Abandoned coastline, Surveyed Flood Zone: A

type of delta within the active flood plain of a river and located on

the seaward side of the abandoned coastline. It has been established

to be flood prone by the Army Corps of Engineers.

443 Delta-Flood Plain, Not Surveyed Flood Zone: A type of delta within the

active flood plain of a river. It has been established to be flood

prone by AlS.

[444 Delta-Flood Plain, Surveyed Flood Zone: A type of delta within the

active flood plain of a river. It has been established to be flood

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prone by the Army. Corps of Engineers.

Delta and Outwash Complex: This landform type is a mixture of delta

and outwash landform types. It usually occurs on the interface between

the two landform types.

L CH-157 B-8

450

451

Tidal Flat: A nearly horizontal, marshy or barren tract of land that

is alternately covered and uncovered by the rise and fall of the tide,

and consists of unconsolidated sediments, mostly mud and sand.

Tidal Flat Within Abandoned Coastline, Not Surveyed Flood Zone: A type

of tidal flat located on the seaward side of the abandoned coastline

which has been established to be flood prone by AIS.

[

452 = Tidal Flat Within Abandoned Coastline, Surveyed Flood Zone: A type of

tidal flat located on the seaward side of the abandoned coastline which

has been established to be flood prone by the Army Corps of Engineers.

460 Coastal Plain: A sediment-covered area of continental shelf recently

emerged above sea level.

Fluvial

Fluvial landforms are formed or shaped by flowing water.

510 = Active Channel: A river plus all of its ephemeral sand bar deposits.

511 = Active Channel, Not Surveyed Flood Zone: Active channels which have

been established to be flood prone by Aerial Information Systems.

512 Active Channel, Surveyed Flood Zone: Active channel which have been

established to be flood prone be the Army Corps of Engineers.

520 = River Bar: Ephemeral, alluvial deposits composed largely of silt, sand

or gravel. They are mostly unvegetated, but some might have grass and

shrub cover.

521 River Bar, Not Surveyed Flood Zone: River bar which has been

established to be a flood prone area by Aerial Information Systems.

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[522 River Bar, Surveyed Flood Zone: River bar which has been established

to be flood prone by the Army Corps of Engineers.

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CH-157 B-9 [

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530

531

Flood Plain: A flat strip of land bordering a river. It was

constructed or is in the process of being constructed by the present

river in its existing regime and is covered with water when the river

overflows its bank at time of high water.

Active Flood Plain: A flood plain which is subject to periodic, often

yearly, flooding.

Abandoned Flood Plain: A remnant flood plain, portions of which may be

infrequently flooded.

Active Flood Plain, Not Surveyed Flood Zone: Active flood plain which

has been established to be flood prone by Aerial Informtion Systems.

532 = Active Flood Plain, Surveyed Flood Zone: Active flood plain which has

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534

been established to be flood prone by the Army Corps of Engineers.

Abandoned Flood Plain, Not Surveyed Flood Zone: Abandoned flood plain

which has been established to be flood prone by Aerial Information

Systems.

Abandoned Flood Plain, Surveyed Flood Zone: Abandoned flood plain

which has been established to be flood prone by the Army Corps of

Engineers.

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550 = Alluvial Plain: An extensive, flat area r~sulting from the deposition

of thick deposits of alluvium. Portions of the alluvial plain may be

subject to infrequent flooding.

560 = Alluvial Fan/Cone: A body of stream deposits whose surface

approximates a segment of a cone that radiates downslope from the point

where the stream leaves a mountainous area. Alluvial fans and cones

CH-15i B-10

have greatly diverse sizes, slopes, types of deposits and source area

characteristics.

570 = Lacustrine Deposits: Material deposited from lake water. Many nearly

level fine grained soils have developed from such deposits from lakes

that have long since disappeared.

Mass lias ting

Mass wasting is a vari~ty of processes by which large masses of earth

material are moved by gravity either slowly or quickly from one place to

another.

610 = Colluvium: Unconsolidated debris, rock fragments and soil, carried by

sheet wash from hillsides to the base of the slope.

620 Talus: A collection of loose rock fragments that have accumulated in a

sloping pile at the foot of a steep slope.

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[630 Landslide Deposits: Materials associated with downslope transport by

means of gravity of soil and rock debris.[

640 = Rock Glacier: A mass of poorly sorted angular boulders or fine

material cemented by interstitial ice, occurring in high mountains in a

permafrost area, derived from a cirque wallar other steep cliff by

fros t action.

650 = Mine Tailings: Those portions of washed are (usually rock fragments)

that are regarded as too poor to be treated further. They are

artificially deposited usually near a mining operation.

Tectonic Uplift

Tectonic uplift is a process by which land surfaces are elevated due to

deformation of the earth's crust.

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ClI-iS7 B-ll L

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710 Upland Valley: Any hollow or low lying area bounded by hills or

mountain slopes. It is usually traversed by a stream or river which

receives the drainage of the surrounding heights. An upland valley is

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one which is found within the mountain physiographic province class.

720 Mountain Sideslope: The sloping portion of land found within the

nountain physiographic province class.

730 = Mountain Ridgetop: The gently sloping area found on the summit of a

mountain. It is surrounded on at least two sides by steep mountain

sideslopes.

Waterbody

A waterbody is any accumulation of water which occurs on the earths

surface. For the Upper Susitna Resource Inventory only waterbodies over 80

acres and were mapped.

810 = Sea: An ocean or a large body of salt water.

820 = Lagoon: An elongated body of water separated from the open sea by

longshore bars, which has little connection with the sea.

821 = Lagoon Within Abandoned Coastline, Not Surveyed Flood Zone: A lagoon

which lies on the seaward side of the abandoned coastline and which was

determined to be flood prone by AIS.

822 Lagoon Within Abandoned Coastline, Surveyed Flood Zone: A lagoon which

lie on the seaward side of the abandoned coastline and which was

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831

determi.ned to be flood prone by the Army Corps of Engineers.

Lake: A body of fresh water enclosed by land. Only lakes 80 acres and

larger were mapped for the Upper Susitna Resource Inventory.

Lake

[ CH-157 B-12

832 = Lake Within Abandoned Coastline, Not Surveyed: A lake which lies on

the seaward side of the a~~ndoned coastline and which was determined to

be flood prone by AIS.

833 Lake Within Abandoned Coastline, Surveyed Flood Zone: A lake which

lies on the seaward side of the abandoned coastline and which was

determined to be flood prone by the Army Corps of Engineers.

834 = Lake in Active Flood Plain, Not surveyed Flood Zone: A lake which is

located in an active flood plain and which was de·termined to be flood

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prone by AIS.

Lake in Active Flood Plain, Surveyed Flood Zone: A lake which is

located in an active flood plain and which was determined to be flood

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prone by the Army Corps of Engineers.

840 = River: A natural stream of .water, fed by converging tributaries, L

841

glaciers, or ground water.

River, Not Surveyed Flood Zone: A river which has been established as

a flood prone area by Aerial Information systems.

[

[842 River, Surveyed Flood Zone: A 'river which has been established as a

flood pron.e area by the Army Corps of Engineers.

Ice and Snow

Non-vegetated areas covered with ice, (glaciers) or snow (permanent

snowfield) year round.

910 = Glacier: An extensive slowly flowing body of ice formed on land by

snow transformed into ice by pressure recrystallization of the snow.

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[920 Permanent Snowfield: Areas covered throughout the year by snow.

Permanent snowfields are found in the higher elevations.

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GENERAL GEOLOGY

General Geology is divided into the following subsections: Surficial

Geology and Bedrock Gr:ology. To assist in interpreting their descriptions, a

brief glossary of some important terms is provided at the end of this set of

code descriptions.

SURFICIAL GEOLOGY

Surficial Geology describes the material occurring on the earth's

surface, consisting of unconsolidated residual, alluvial deposits, glacial

deposits, or bedrock surfaces.

1 = No Surficial Deposits: Large areas within the upland and mountain areas

of the study area were coded as having no significant surficial deposits.

However, much of the lower slopes within this area do have a thin veneer

of glacial till and colluvium and within valley bottom, alluvium.

2 Surficial Deposits: Includes glacial till and outwash, channel fill,

alluvium. colluvium and loess deposits. The lowland valley areas are

covered by thick deposits of glacial drift and alluvial sediment that

consists mainly of gravelly and sandy material. and deposits of silty

windlaid sediments and volcanic ash.

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3 = Waterbody: Only waterbodies larger than 80 acres were mapped.

4 = Glacier: Areas of glacial ice and/or permanent snowfields ·on the

surface.

BEDROCK GEOLOGY

Bedrock Geology describes the rock formation. age~ and types underlying

those in surficial geology.

L CH-157 B-14

01 = Tertiary Undifferentiated (Tu, Qag): All the tertiary age formations

not identified as a particular formation.

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03

Tertiary Intensive" (Ti): Made up of dikes, sills, and stock; Felsic to

mafic of tertiary age.

Tsadaka Formation (Tt): A formation of conglomerates, sandstone, and

siltstone of tertiary age.

I:

04 = Arkose Ridge Formation (Tar): This unit consists of arkosic sandstone,

conglomerate, and shale of paleocene age.

05 = Chickaloon Formation (Tc): This unit is composed of claystone,

siltstone, sandstone, coal-bearing beds, and conglomerate of Paleocene

age.

06 = Tertiary/Cretaceous Plutonic (TKgt): A general grouping of a pluton

mass, or body of igneous rock formed beneath the earth's surface, that

has an origin sometime between the Tertiary and Cretaceous periods.

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09

Paleozoic/Jurassic/Cretaceous, Undifferentiated Sediments and

Metasediments (PKJu): A general grouping of partially changed

unidentified rock formations found with these periods.

Nesoic/Paleozoic Metamorphozed Schist (MPs): Formation of a medium or

coarse grained rock changed over time.

~"aterbody

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10 = Tyonek Formation (Tts): Ths formation is comprised of predominantly

sandstone, but also includes siltstone, coal-bearing beds, and

conglomerate of Ogliocene age. The conglomerate may be locally the

dominant rock type. The Tyonek formation is part of the Kenai Group.

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11 = Mesozoic Marine Sedimentary Rocks, Undivided (Kju): This designation is

utilized to refer to an unnamed body of rocks consisting primarily of

grawacke, shale, siltstone, argillite, and chert of Jurassic to

Cretaceous age.

12 = Metamorphosed Volcanic Rocks (Pvz): This designation is utilized to

refer.to a body of metavolcanic rocks of Paleozoic age.

13 = Undifferentiated Volcanic Rocks (Tv): This unit is utilized to refer to

all unnamed volcanic rocks of Tertiary age. These volcanics may occur

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as extensive flows, hypabyssal intrusive rocks, pyroclastic tuffs and/or

volcanic breccias.

Intrusive Igneous Rock, Granite or Granodiorite (Ruth Pluton) (Tmr):

This designation refers to th~ Ruth Pluton, which consists of a number

of shallow, forcibly emplaced, epizonal plutonic bodies of granodiorite

composition formed during the Paleocene to possibly Eocene Age.

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15 Sterling Formation (Tps): This unit is comprised of sandstone and

siltstone beds with some coal-bearing strata of Miocene to Pliocene Age.

The Sterling Formation is considered part of the Kenai Group.

16 = Intrusive Igneous Rock, Granite or Grandodiorite (Kahiltna Pluton)

(Tmk): The designation refers to the Kahiltna Pluton, which is composed

of nl~erous forcibly placed, epizonal plutonic bodies of granite and/or

granodiorite formed during Tertiary times.

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17 Undifferentiated Sedimentary Rocks (Tsu): This unit refers to all the

Paleocene to Pliocene (Tertiary) sedimentary formations occuring within

the study area. This designation is used primarily when the body of

rock cannot be correlated to any specific formation. These formations

CH-157 B-16

include the Kenai Group, Tsadaka Formation, West Foreland Formation,

Wishbone Formation, Arkose Ridge Formation, Chickaloon Formation and

others.:~ .~-

18 = Glacier: This unit refers to glacial ice and permament snowfields which

are of sufficient thickness to obscure the identification of the

underlying country rock.

19 = Kenai Formation, Sandstone, Conglomerate, Siltstone, Claystone (Tku,

Tkm, Tki): This group is composed of sandstone, siltstone, coal-bearing

beds, and conglomerate of Oligocene to Pliocene age. The unit consists

of the. Sterling Formation, the Beluga Formation, the Hemlock

Conglomerate, and the Tyonek Formation.

20 Landslide Deposits (Qls): This unit is comprised of mass-wasting

products of Quaternary age. The unit is considered part of the

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22

surficial cover deposits.

Jurassic, Plutonic and Metamorphic Rocks Undifferentiated (Jtr, Jg, Jm,

Jpm): This unit is composed of a- grouping of complexly related plutonic

igneous and deep-seated metamorphic crystalline rocks of Jurrassic age.

Triassic-Jurassic Volcanic and Sedimentary Rocks Undivided (JTr, JTrs):

This unit is comprised of predominantly marine, intercalated tuffs, lava

flows, and silicaeous sedimentary rocks of Triassic or Jurassic age.

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23 = Marble (PIs): This designation refers to recrystallized carbonate rocks

24

of probable Paleozoic age.

Graywacke, Argillite, Shale and other Sedimentary Rocks (DS): This unit

consists of slightly metamorphosed to unmetamorphosed silicaeous

sedimentary roc~s of Silurian and Devonian age.

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CH-l57 B-17[

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2S Quaternary-Tertiary Volcanics and shallow Intrusives. This designation

is comprised of andesitic and basaltic volcanic and hypabyssal intrusive

rocks of Quaternary or Tertiary age. This unit includes the Wrangell

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Lava.'

26 = Tertiary Continental Sedimentary Rocks: This type is composed of all

Tertiary non-marine sedimentary roct~ (Paleocene to Pliocene) found in

the study area, and particularly includes the Gakona Formation.

27 = Mesozoic-Paleozoic Volcanic Rocks: This unit consists of andesitic and

basaltic volcanic rocks of Permian and Triassic age, and Tuffs and lava

flows of undifferentiated composition of Carboniferous or Jurassic age.

This designation includes the Nikolai Greenstone.

28 = Mesozoic-Paleozoic Plutonics and Shallow Intrusive Rocks: This type is

comprised of both deep-seated plutonic.igneous and hypabyssal intrusive

igneous rocks of possibly Carboniferous age or older to Cretaceous age.

29 = Paleozoic Metasedimentary and Metavolcanics Undifferentiated: This

designation consists of intercalated generally moderately metamorphosed

sedimentary and volcanic rocks of Carboniferous age or older. This unit

includes the Strelna and Chisna Formation, the Dedina Schist, Tetelna

Volcanics, and the Klutina Group.

99 = \1aterbody

VEGETATION

Primary Vegetation

Secondary Vegetation

Tertiary Vegetation

Quaternary Vegetation

L CH-IS7 B-18

Wherever possible, pure strands of any vegetation type were delineated

as polygons and given the appropriate primary vegetation code. However, many

vegetation types can occur in stands of less than eighty acres, the minimum

mapping resolution, and are therefore too small to be mapped as discrete

polygons. If only the primary vegetation type was mapped, polygons less than

80 aces would be ignored. This vegetation classification deals with these

small vegetation stands by identifying not just a polygon's primary

vegetation, but also the secondary, tertiary, and quaternary vegetation. The

dominant vegetation type is coded as the primary v~getation, and any

additional vegetation types which occur within the polygon are coded

secondary, tertiary or quarternary vegetation.

Forest - Woodland

Forest: Forest land is land with more than 50% of tqe area having tree

crown cover or formerly having 50% cover.

21 = Coniferous Forest, lVhite Spruce, Short Stands, Closed Forest: Main

canopy usually less than 30 ft. in height, usually found at higher

elevations as isolated pockets in area dominated by alder, grassland, or

open mixed stands.

22 = Deciduous Forest, Mixed Forest, Young Stands, Closed Forest: Canopy is

usually very finely· textured as' seen from above, openings in stand are

very rare. Composed mostly of birch and/or aspen. This type very

rarely mixed with other types except when found as a remnant condition

in burned areas. Spruce is.not usually evident asa component of the

overs tory in these young stands. 0-40 years old.

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24

25

Deciduous Forest) Mixed Forest) Medium-Aged Stands, Closed Forest;

Canopy is usually fine textured as seen from above) openings may be

fairly common but they are usually small. Elements of this type include

birch, spruce and aspen. Birch is usually found as a main component of

this type but percent composition may vary greatly depending on a number

of f~ctors, e.g., as the type increases in age, the percentage of white

spruce as a crown component usually increases along with the amount of

understory and number of stand openings. 40-10P years age.

Coniferous Forest, White Spruce, Tall Stands, Closed Forest; Main

canopy usually greater than 30 ft. in height, usually found at lower

elevations on better sites, almost always found mixed with old and

decadent deciduous trees (very rarely found as a pure type in Susitna

Valley).

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26 = Deciduous Forest, Mixed Forest, Old Stands, Closed Forest: Canopy is

usually somewhat coarse textured as seen from above, openings are

usually common and may cover close to half of the stand area. Canopy

may also appear smooth, but openings appear as definite holes in the

crown. Deciduous t~ees in these old stands are usually decadent.

Spruce is usually becoming the dominant species. The understory

component of the stand is usually visible from above and includes

Calamagrostics and Alnus as its most common species. These stands are

l 27

always greater than 100 years old.

Cottonwood, Young Stands, Closed Forest: Most commonly found on new

islands, downstream ends of old islands, and point bars of rivers.

CH-157 B-20

28

Cottonwood or poplar is usually found mixed with large alder and/or

willow - (understory is sparse to nonexistent). 0-40 years old.

Cottonwood, Medium-Aged Stands, Closed Forest: Most commonly found in a

riverine situation or within at least one mile of a river (alluvial

soils). Stands are usually pure cottonwood or poplar, spacing is even

and crown closure approaches 100%. Understory in the Susitna Valley is

dominated by alder and devil's club. 40-100 years old.

29 = Cottonwood, Old Stands, Closed Forest: Most commonly found in riverine

influence (alluvial soils). Stands may be mixed with young white

spruce. Cottonwood are extremely large (30-40 inches in diameter) and

decadent (larger trees may be only shells). Stand appears somewhat

clu~py due to openings appearing in stand. Understory includes large

quantities of alder, devil's club and willow. Greater than 100 years

old.

Open Forest - Woodland

A forest or woodland area with 10% - 50% crown cover.

31 Coniferous Forest, White Spruce, Short Stands, Woodland: Usually found

at higher elevations as a transition type between closed forest and high

elevation nonforest areas. Usually found mixed with elements of the

higher elevation type, i.e., if the higher elevation type is a mixture

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of alder and grass then the open white spruc~ transition type will

normally be forming a complex type with alder and grass. 30 feet tall.

Deciduous Forest, Mixed Forest, Medium-Aged Stands, Woodland: Although

birch/aspen stands are not usually found as a transition type between

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forest and high elevation nonforest areas, they are often found just

below areas of type 31. 40 years old.

Coniferous Forest, White Spruce, Tall Stands, Woodland: Same as type 31

except normally found at lower elevations or on better sites. Commonly

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found in creek bottoms mixed with alder/willow and grass. 30 ft. tall.

34 = Deciduous Forest, Mixed Forest, Old Stands. Woodland: Found in same

general location as type 33. Found in ,association with grass ~nd alder.

Birch, in this type, is usually found growing in very small, tight

clumps. Spruce are usually found to have an open grown form and are

normally much younger than the hardwood component of the type.

35 = Cottonwood, Medium-Aged Stands, Woodland: Usually found at treeline

just above elevational limit of open white spruce. Found in pockets

among low shrubs.

36 = Cottonwood, Old Stands, Woodland: Two elevational phases of this type

seem to occur. The high elevation phase, consisting of balsam poplar,

may be" found mixed with streamside alder/willow along flowing water on

high elevation flats. The low elevation phase. consisting of

cottonwood, may be found on major river flood plains growing with a

confusing mixture of other types including open spruce, open birch,

alder, grass, etc.

Closed Forest (Black Spruce Mountain Hemlock)

A forest area having a greater than or equal to 50% crown cover composed

of black spruce or mountain hemlock.

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41 Black Spruce, Short Stands, Closed Forest: Main canopy usually less

than 30 ft. in height, generally found on wet and/or cold (poor) sites,

L CH-157 B-22

may be found mixed with birch of poor quality but usually found as a

pure type forming islands and stringers in bog areas or transition zones

between bog area and forest areas. Understory is usually a thick moss

and/or sedge mat.

42 = Black Spruce, Tall Stands, Closed Forest: Main canopy usually greater

than 30 ft. in ht. Can usually be identified as a fire formed stand, on

relatively good sites, stands are remarkably pure and the stocking•

density is usually quite high.. May be found mixed with very scattered

birch.

45 = Mountain Hemlock, Short Stands, Closed Forest: Main canopy less than 30

ft. - Geographically.limited in Susitna Valley to higher ground west of

Tyonek, fourid as stringers mixed with other local types.

46 = Mountain Hemlock, Tall Stands, Closed Forest: Main canopy greater than

30 ft. Geographically limited in Susitna Valley to low ground west of

Tyonek, found as stringer stands mixed with other local types.

Open Forest - Woodland (Black Spruce)

Includes black spruce stands with 10% to 50% crown cover.

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c43 Black Spruce, Short Stands, Open Forest-Woodland: Found in association

with bog types. Black spruce are usually of very poor form. Site is

either wet or cold or both - trees usually less than 15 ft. in height.

Non Forested

Non forested land is land with less than 10% of the area having tree

crown cover.

Sal t ~.j'ater Wetlands

Salt water wetlands are areas with moist soil and high saline levels.

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CH-157B-23 [

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f'50 Salt Grassland: Elymus dominated grassland in areas of tidal influence.

Usually found at edge of normal high water in sandy soil. Normally this

type is ~ound in areas where the shoreline gradient is relatively steep,

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usually found as a belt of grass along the shore.

51 Low shrub: Myrica dominated shrubland located on "tidal flats. ~ater

level is usually fluctuating seasonally. In areas that are more

continuously wet, sedge replaces Myrica .

••52 = Tidal Marsh: Usually found in areas with many shallow lakes and little

topographic relief (within tidal influence). Vegetation is dominated by

various sedges. Woody plants may occur on the drier sedge and peat

ridges that are common to this type.

Tall Shrubs

Taller stands of a several stemmed woody plant composed of the following

vegetation types:

60 = Alder: This type is dominated by tall (10-15 ft.) alder growing in

dense thickets with grasses, ferns) and a great variety of forbs growing

in the understory. Devil's club can be found as a dominant understory

to the alder on wetter and steeper sites. Devil's club will normally

exclude other understory vegetation. The type is found at or above

treeline. At treeline it is often found mixed with open white spruce

and cottonwood types.

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61 Alder-Willow: This type is dominated by a mixture of very large alder

and willow. This type is normally found on frequently flooded ground

such as new islands, point bars, etc. Understory is sparse but may

include Equisetur and Calamogrostis. This type is often found mixed

L CH-157 B-24

with young open cottonwood (in younger stands the cottonwood is almost

indistinguisable from the willow and alder).

Low Shrub

A low, several stemmed woody plant composed of the following vegetation

types:

62 = Willow Resin Birch: This type is dominated by either willow or resin

birch or a combination thereof. The type is often f?und in sheltered

situations at high elevations, e.g., draws in mountainous terrain. This

type is found at and above the transition between tall shrubland and

tundra.

Grassland

Land in which grasses are the predominant vegetation.

63 = Upland Grass: This type is dominated by Calamagrostics 1 to 2 meters

tall. Fireweed and various ferns are sometimes common. This type is

nost often found as an understory in the more open forest types and

woodland areas where it is commonly associated with alder patches. This

type can also be found unassociated with other types along small

streams.

Tundra

An area where the mean monthly temperature is below freezing. In the

summer, only mosses, lichens and some flowering plants appear, while the cold

of winter make normal tree growth impossible, allowing only stunted willows,

birches, etc.

64 = Sedge-Grass: This type is found above treeline on rel~tively flat, wet

areas. Vegetation consists almost entirely of various wet sedges.

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CH-157 B-25 l

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[ 65 Herbaceous: This type is found above treeline and is almost always

found mixed with and above shrub tundra. The variety of species found

in this type is immense, consisting mainly of various grasses and forbs.

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Soil varies in depth and may be intermixed with rockoutcroppings.

Vegetation may not be continuous.

66 = Shrub: This type is dominated by dwarf arctic birch and other shrubs

along with various short grasses and a large number of forbs. This type

is almost always found mixed with and below herbacious tundra. Density

of the shrubs found in this type varies considerably and may often

appear quite patchy.

67 = Mat and Cushion: This type is dominated by such plants as dryas,

crowberry, bearberry, sedge, grass, lichen and other 1;'ooted forbs.

Climatic conditions are extreme at the elevation where this type is

found. Vegetation cover may be complete (closed mat cushion) or

relatively sparse (scattered mat cushion) with a large percentage of the

vegetation being lichen. This type is often mixed with rock.

Freshwater Wetlands

An area of moist soil saturated with freshwater and containing the

following vegetation:

68 = Sphagnum Bog: Cover is dominated by varying amounts of sedge,

equisetum, and moss (especially sphagnum). This type is usually found

as a floating mat over several feet of water or as a thick mat directly

over saturated or frozen soil. Shrubs and stunted trees (if present)

may be found on drier peat ridges. This type is similar to tidal marsh

except that shallow lakes are less common, the peat ridges form a more

CH-157 B-26

continuous and regular patterns and the type is found inland beyond

ti~al reach. Usually found as a pure type.

69 = Sphagnum-Shrub Bog: Vegetation of this type is dominated by a thick,

moss mat (sphagnum) and/or sedge tussocks. Grass, ericaceous shrubs,

salix, blueberry and cranberry may also be present. Ground water level

usually varies seasonally but this type is generally not as wet as

sphagnum bog. This type is usually mixed with open stands of short

black spruce. Many other types may also be found in close association

with sphagnum shrub bog. The associated types are typically found on

glacial moraines and eskers within the bog·area.

Cultural Features

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70

Han related features associated with the following:

Cultural Influences: May be broadly defined as land that has been

obviously aff~cted by human activity. Includes agricultural land, urban

areas, and land developed to support or provide services to agricultural

and urban land. This "type" may indeed be vegetated but vegetation that

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[is present may not be natural in either composition or spacing.

Barren [

80

Largely unvegetated tracts of land.

~lud Flats: Confined to tidal areas (Cook Inlet) and the mouths of major

rivers (Susitna, Knik). This "type" may appear vegetated on C.I.R. and

color photography or from the air; however, the "vegetation" is usually

algal blooms and/or other sea plants. Mud flats are usually well

pa tterned with ripple marks or water drainage patterns •... They are

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CH-157 B-27 L

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normally submersed during high tide. They may be used as resting and

feeding areas by waterfowl.

81 = Rock: Exposed bedrock and scree commonly found along with mat cushion

tundra at high elevations. This "type" is also used to describe large

landslide areas, some morainal features, and other natural barren areas.

Permanent Snow and Ice

An area tvhere snow and ice is present throughout the y~ar.

82 Snotvfield High elevation snow accumulation areas. Appears to bea

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permanent or nearly year round part of the landscape. May be found as

small pockets on slopes protected from the sun, on lee'slopes 'or in -

gulleys. Usually found over bare ground. May also be found as large

snow accumulation areas at very high elevations. Often mixed with mat-

cushion tundra and rock.

83 = Glacier: Includes both icefields and glaciers. Usually found covering

several square miles. Considered, a permanent part of landscape •. To

differentiate 83 from 82 note 83 covers much larger areas; crevasses,

moraines and other glacial features are usually present.

Hater

Areas consisting of the following water bodies:

96 Streams and rivers at least 165 feet wide, but less than 600 feet wide

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91

92

97

Lakes greater than 40 ac. (census water)

Lakes at least 10 ac., but less than 40 ac.

Rivers greater than 1/8 mile (census water)

CH-IS7 B-28

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UPPER SUSITNA

APPENDIX C

GRID MULTI-VARIABLE FILE

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POSITION

1

2

3

4.

5

6

7

8

9

10

11

12

13

14

15

16

17

18

UPPER SUSITNAAREAS A, B, D & E AND AREA C

GRID MULTIVARIABLE FILES

DESCRIPTION

Row

Column

Map Module Nmber

Unique Terrain Unit Number

- Emply Position -

Terrain Unit Polygon Number

Slope

Physiographic Division/Landform*

Surficial/Bedrock Geology*

- Emply Position -

Primary/Secondary Vegetation*

TertiarY/Quaternary Vegetation*

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*Indicates the position has been packed for storage efficiency.

[ CH-140 C-2

DESCRIPTION OF PACKED VARIABLES

POSITION

10

11

17

18

CH-14C

TOTAL II

OF DIGITS

4

3

4

4

RANGE

4-4

1-3

3-3

1-2

3-4

1-2

3-4

1-2

C-3

DESCRIPTION

Physiographic Division

Landform

Surficial Geology

Bedrock Geology

Primary Vegetation

Secondary Vegetation

Tertiary Vegetation

Quaternary Vegetation

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maximum x coordinate = 443467.430

minimum x coordinate 338823.2375

minimum ycoordinate = 525950.1035

The grid cell is 40 acres or 402.336m/side.For GRIPS 402.336/

3= 134.1129768m/si~e

3922.694352

356479.258

ALAS¥.A VIIIUPPER SUSITNA

GRID ORIGIN - AREAS A, E, D & E

6,500,OOOm subtracted from the vertical coordinate.

Vertical Shift

minimum y coordinate

GRIPS

unf zone 6

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GRDPST

Output number of rows 1266/3 = 422

output number of columns 783/3 = 261

REGISTRATION TO OTHER GRID FILES

Row 1 of ALARN I MVF Rml1 82 of this MVF

Column 1 of this HVF = Column 7 of AL.,./\RH I HVF

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Horizontal Shift

Haximum Row

Haximum Column

= -2525.401588

1266

= 783

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[CH-140 C-4

UTN zone 6 - 6,500,000m subtracted froe the vertical coordinate

The grid cell size is 40 acres or 402.336m/sideFor GRJPS 402.336/

3= 134.1129768m/side

maximum x coordinate 533718.805

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,ALASKA VIIIUPPER SUSITNA

GRID ORJGIN - AREA C

= 3253.699224Vertical shift

minimum y coordinate = 436229.1755

minimum y co~rdinate ~ 386963.070

minimum x coordinate = 486480.5495

GRIPS

REGISTRATION to other GRID files

Row 1 = Row 223 of Areas A. B, D & E

Output number of rows 369/3 = 123 rows

354

= 369

= -3626.393569

Output number of columns 354/3 = 118 rows

Column 1 = Column 367 of Areas A. B, D & E

Naximum row

Haximum column

Horizontal shift

GRDPST

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APPENDIX D

UPPER SUSITNA

VEGETATION STATISTICS

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ALASKA SUSITNA RIVERBASINUPPER SUSITNA SUBBASIN

VEGETATION BY POLYGON - ANCHO~~GE D5

POLYGON TOTAL NUMERIC ALPHANUMBER ACRES CODE CODE

5 34.2 67 Tundra - Mat and Cushion7 928.4 67

----------962.6 67

4 113.9 81 Rock6 68.1 819 566.3 81

10 734.2 8112 82.3 8113 95.6 81

----------1,660.5 81

2 164.8 83 Glacier3 8,201.0 838 441.2 83

11 701.8 8314 9.1 83

----------9,517.9 83

==========12,140.9

D-2

ALASKA SUSITNA RIVERBASINUPPER SUSITNA SUBBASIN

VEGETATION BY POLYGON - ANCHORAGE D6

POLYGON TOTAL NUMERIC ALPHANUMBER ACRES CODE CODE

12 180.0 24 Closed Deciduous Mixed 7 Medium-aged

9 5,743.4 60 Tall Shrub - Alder

8 5 7 908.5 65 Tundra - Herbacious17 260.4 65

. 18 2~913.2 6523 112.4 6525 184.7 6527 389.5 6533 118.9 65

---------9,887.5 65

3 204.6 67 Tundra - Mat and Cushion5 8,198.1 677 9,974.3 67

11 141.3 6720 19,859.1 6743 200.0 6745 52.1 67

----------38,629.4 67

19 152.0 80 Mud Flats

22 243.3 81 Rock26 250.0 8128 97.2 8129 110.3 8130 85.7 8134 290.7 81

----------1,077 .2 81

10 67.4 82 SnQtvfield39 327.4 82

----------394.8 82

2 455.0 83 Glacier

D-3

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PAGE 2

ALASKA SUSITNA RlVERBASINUPPER SUSITNA SUBBASIN

VEGETATION BY POLYGON - ANCHORAGE D6

POLYGON TOTAL NUMERIC ALPHA1I."UMBER ACRES CODE CODE

4 1)660.0 83 Glacier6 1)560.4 83

13 265.6 8314 102.6 8315 237.7 8316 1)048.7 8321 34.3 8324 364.2 8331 609.9 8332 261.0 8335 1)121.8 8336 790.5 8337 73.9 8338 1)118.2 8340 58.7 8342 1)205.5 8344· 542.2 8346 116.5 8347 771.7 83

---------12)398.4 83

41 44.2 91 Lakes greater than 40 acres==========

68)507.1

D-4

ALASKA SUSITNA RIVERBASINUPPER SUSITNA SUBBASIN

VEGETATION BY POLYGON - ~~CHORAGE D7

POLYGON TOTAL NUMERIC ALPHANUMBER ACRES CODE CODE

5 574.7 24 Closed Deciduous Mixed~Medium-aged

15 52.1 31 Open White Spruce~Short

2 404.4- 60 Tall Shrub - Alder6 3~766.7 609 1l0.9 60

----------4~282.0 60

16 141.3 61 Tall Shrub - Alder-WilloW'

8 237.8 62 Low Shrub - Willow Resin Birch18 54.7 62

----------292.6 62

3 131.3 65 Tundra - Herbacious7 1~347.4 65

11 724.9 6512 1~455.5 6513 895.8 6517 479.3 6519 3~097.6 6520 816.6 6523 357.5 65

----------9~305.8 65

4 58.9 67 Tundra - Mat and Cushion10 9,122.2 6721 7,287.4 67

----------16~468.5 67

14 66.1 68 Freshwater Wetland - Sphagnum Bog

22 435.1 81 Rock24 235.0 8125 453.7 8126 242.7 81

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VEGETATION" BY POLYGON - ANCHORAGE D7

POLYGON TOTAL NUMERIC ALPHANUMBER ACRES CODE CODE

27 238.5 81 Rock28 446.5 81

---_._----2,051.6 81

==========33,234.7

PAGE 2

ALASKA SUSITNA RIVERBASINUPPER SUSITNA SUBBASIN

VEGETATION BY POLYGON - ANCHO~~GE D8

POLYGON TOTAL NUMERICNUMBER ACRES CODE

3 143.7 315 370.8 31

----------514.5 31

2 749.2 60

8 7.0 62

4 128.8 646 145.3 647 40.9 64

----------315.0 64

==========1)585.7

ALPHACODE

Open White Spruce)Short

Tall Shrub- Alder

Low Shrub - Willow Resin Birch

Tundra - Sedge Grass

D-7

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ALASKA SUSITNA RIVERBASIN. UPPER SUSITNA SUBBASIN

VEGETATION BY POLYGON - GULKANA AS

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POLYGON TOTAL NUMERICNUMBER ACRES CODE

2 135.5 255 257.9 25

----------393.4 25

3 3)402.1 33

7 12)514.2 43

6 605.7 628 165.0 62

--_...._-----770.7 62

4 39.4 91=========-=

17 )119.8

ALPHACODE

Closed White Spruce)Ta1l

Open White Spruce)Tall

Open Black Spruce)Short

Low Shrub - Willow Resin Birch

Lakes greater than 40 acres

D-8

ALASKA SUSITNA RIVERBASINUPPER SUSITNA SUBBASIN

VEGETATION BY POLYGON - GUL~~NA A6

POLYGON TOTAL NUMERIC ALPHANUMBER ACRES CODE CODE

13 1,001.4 25 Closed White Spruce, Tall

21 124.6 29 Closed CottonW'ood,Old33 91.0 29

---------215.7 29

2 122.8 33 Open lfhite Spruce,Tall4 125.0 338 301.6 33

11 17,025.6 33 .19 114.3 3322 328.7 3329 385.9 3345 324.1 3350 227.8 3353 257.9 3356 1,565.2 3357 141.1 3359 1,220.3 3369 228.3 3370 71.2 33

----------22,439.8 33

10 4,743.8 43 Open Black Spruce,Short14 1,850.7 4327 298.3 4331 494.0 4337 8,482.8 43

----------15,869.6 43

3 8,947.3 62 LoW' Shrub - WilloW' Resin Birch6 154.7 627 20.0 62

15 17,568.3 6226 1,075.3 6243 2,173.4 6249 33.7 6258 2,483.2 62

D-9

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VEGETATION BY POLYGON - GULKANA A6

POLYGON TOTAL NUMERIC ALPHANUMBER ACRES CODE CODE

63 66.3 91 Lakes greater than 40 acres65 1,130.0 9167 54.0 9171 43.8 91 .

----------3,038.4 91

========:::1:=82,061.2

D-11

PAGE 3

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VEGETATION BY POLYGON - GULK-~NA B5

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POLYGON TOTAL NUMERICNUMBER ACRES CODE

31 897.1 2541 108.9 2543 48.3 25

----------1,054.3 25

25 294.8 3327 972.8 3334 239.8 3337 591.7 3338 454.9 33

---------2,554.1 33

14 191.5 4315 83.7 4316 207.5 4328 . 2,535.3 43

----------3,018.0 43

2 25,694.7 6232 76.3 62

----------25,771.0 62

39 55.9 69

3 80.8 914 4.2 915 42.0 916· 42.0 917 384.8 918 89.4 919 103.3 91

10 72.5 9111 550.2 9112 82.1 9113 72.1 9117 59.4 9118 118.4 91

ALPHACODE

Closed White Spruce, Tall

Open White Spruce,Tall

Open Black Spruce,Short

Low Shrub - Willow Resin Birch

Freshwater Wetland - Sphagnum-Shrub Bog

Lakes greater than 40 acres

D-12

ALASKA SUSITNA RIVERBASINUPPER SUSITNA SUBBASIN

VEGETATION BY POLYGON - GULK-~NA B5

POLYGON TOTAL NUMERIC ALPHANUMBER ACRES CODE CODE

19 330.2 91 Lakes greater than 40 acres20 79.3 9121 . 19.9 9122 351.3 9123 2,599.7 9124 96.1 9126 79.1 9129 136.4 9130 149.4 9133 85.2 9135 53.5 9136 152.1 9140 103.4 9142 65.0 91

----------6,001.8 91

==========38,455.0

D-13

PAGE 2

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VEGETATION BY POLYGON - GULKANA B6

POLYGON TOTAL NUMERIC ALPHANUMBER ACRES CODE CODE

14 472.1 25 Closed White Spruce,Tall19 203.9 2561 179.9 2598 104.0 25

108 121.3 25----------

1,081.2 25

49 12,655.6 33 Open White Spruce,Tall53 413.1 3317 72.7 3385 95.9 3391 175.7 33

109 102.3 33----------

13,515.4 33

22 226.4 43 Open Black Spruce,Short26 1,057.0 4328 1,559.7 4338 174.6 '4356 129.9 4357 179.7 4364 135.2 4374 23.2 4376 73.4 4380 37.5 4384 400.8 4395 1,879.7 43

103 406.6 43----------

6,283.7 43

2 82,874.8 62 Low Shrub - Willow Resin Birch18 27.7 6255 393.8 6262 70.6 6272 6,674.5 62

107 43.1 62----------

90,084.6 62

.D-14

PAGE 2

ALASKA SUSITNA RIVERBASINUPPER SUSITNA SUBBASIN

VEGETATION BY POLYGON - GULKANA B6

POLYGON TOTAL NUMERIC ALPHANUMBER ACRES CODE 'CODE

5 281.2 65 Tundra - Herbacious,11 218.5 6512 690.8 6513 155.0 6517 397.2 6536 506.1 ·6545 824.4 65

---...;------3~073.2 65

7 22~637.1 66 Tundra - Shrub30 , 7~759.0 66

----------3·0~396.l 66

31 189.3 69 Freshwater Wetland - Sphagnum-Shrub Bog34 354.6 6935 125.9 6937 81.2 6950 61.3 6958 75.5 6959 80.9 6965 138.6 6968 51.6 6970 86.0 6973 206.0 6975 318.0 6981 145.8 69 .88 864.3 6992 777.0 6994 83.0 6997 72.4 6999 130.3 69

100 90.0 69102 97.8 69

----------4,029.3 69

3 9,687.1 91 Lakes greater than 40 acres4 2.2 916 17.2 91

D-15

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[ PAGE 3

ALASKA SUSITNA RIVERBASIN

[ UPPER SUSITNA SUBBASINVEGETATION BY POLYGON - GULKANA B6

[POLYGON TOTAL NUMERIC ALPHA

NUMBER ACRES CODE CODE

8 7.9 91 Lakes greater than 40 acres

[ 9 139.8 9110 138.8 9115 183.2 91

[ 16 184.2 9120 93.0 9121 70.9 91

r 23 63.6 9124 227.9 91

L 25 23.5 9127 906.5 91

[ 29 620.6 9132 75.3 9133 71.2 91

L 39 621.1 - 9140 86.6 91·41 44.8 91

B42 12,234.8 9143 71.2 9144 55.4 9146 50.7 91

C 47 54.7 9148 61.8 9151 45.6 91

C52 146.7 9154 48.7 9160 1,225.2 91

C63 328.4 9166 224.8 9167 77.3 9169 184.4 91

[ 71 11.2 9178 124.1 9179 100.6 91

[ 82 122.7 9183 176.6 9186 261.3 91

r- 87 . 78.4 91

L 89 75.2 9190 111.1 9193 42.7 91

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[ D-16

ALASKA SUSITNA RIVERBASINUPPER SUSITNA SUBBASIN

VEGETATION BY POLYGON - GULKANA B6

TOTAL NUMERICACRES CODE

POLYGONNUMBER

96101104105106110111

102.892.8

17"4.773.334.55.94.7

29,667.6==========

178,131.1

91919191919191

91

1\ALPHACODE

Lakes greater than 40 acres

D-17

PAGE 4

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VEGETATION BY POLYGON - GULKANA C5

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POLYGON TOTAL NUMERICNUMBER ACRES CODE

2 4,677.2 626 124.8 62

----------4,802.0 62

3 53.3 914 176.7 915 486.5 917 56.9 918 17.4 91

----------790.8 91

==========5,592.8

ALPHACODE

Low Shrub - Willow Resin Birch

Lakes greater than 40 acres

D-18

ALASKA SUSITNA RIVERBASINUPPER SUSITNA SUBBASIN

VEGETATION BY POLYGON - GULKANA C6

POLYGON TOTAL NUMERICNUMBER ACRES CODE

17 356.8 43

2 11,504.8 625 13,709.9 62

19 10.4 62---_....._-----25,225.1 62

3 185.3 914 102.6 916 942.4 917 67.8 918 95.4 919 114.8 91

10 263.7 9111 78.6 9112 39.8 9113 109.1 9114 250.6 9115 211.0 9116 8.0 9118 37.1 91

----------2,506.2 91

=========~

28,088.1

ALPHACODE

Open Black Spruce,Short

Low Shrub - Willow Resin Birch

Lakes greater than 40 acres

D-19

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VEGETATION BY POLYGON - HEALY A4

POLYGON TOTAL NUMERIC ALPHANUMBER ACRES CODE CODE

4 25.1 61 Tall Shrub - Alder-Willow

3 2,486.2 62 Low Shrub - Willow Resin Birch6 74.6 62

----------2,560.9 62

5 2,805.5 65 Tundra - Herbacious8 174.8 65

10 126.4 6511 12,021.6 6519 405.6 65

----------15,533.9 65

2 59.4 67 Tundra - Hat and Cushion9 11,125.2 ·67

13 16,465.3 6717 535.5 6718 187.1 67

----------28,372.4 67

12 162.4 81 Rock14 128.9 8115 257.9 81

----------549.1 81

16 201.9 83 . Glacier20 179.4 8321 222.1 8322 411.9 8323 125.7 8324 170.4 83

----------1,311.4 83

7 8.9 91 Lakes greater than 40 acres====~:====

48,361.6

D-20

ALASKA SUSITNA RIVERBASINUPPER SUSITNA SUBBASIN

VEGETATION BY POLYGON ~ HEALY AS

POLYGON TOTAL . NUMERIC ALPHANUMBER ACRES . CODE CODE

22 882.1 21 Closed Hhite Spruce, Short23 102.0 2130 880.5 2135 156.4 2138 1,281.1 2141 102.9 2150 251.7 2152 744.7 21

-----..._---4,401.4 21

74 201.1 25 Closed ~fhite Spruce,Tall

2 1,113.0 60 Tall Shrub - Alder4 396:6 606 20,82240 60

17 5,166.2 6043 171.4 6045 9,327.5 6087 29.1 6091 295.2 60

----------37,321.0 60

3 1,948.2 61 Tall Shrub - Alder-Willow7 34.3 61

16 222.2 6129 188.7 6132 1,656.3 6146 521.5 6172 176.8 61

----------4,747.9 61

8 145.7 62 Low Shrub - Willow Resin Birch9 21.4 62

47 1,98100 6260 87.3 6281 197.1 6289 469.1 62

----------2,901. 7 62

D-21

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ALASKA SUSITNA RIVERBASINUPPER SUSITNA SUBBASIN

VEGETATION BY POLYGON - HEALY A5

POLYGON TOTAL NUMERICNUMBER ACRES CODE

55 131.4 6758 4,635.4 6761 8,139.9 6763 98.4 6775 2,674.9 6776 240.5 6780 777.3 6784 5,637.1 6785 157.4 6786 510.0 67

----------41,823.9 67

25 151.8 6936 296.1 6937 114.1 6959 312.1 69

--------874.1 69

5 121.9 7021 112.6 7034 99.8· 7042 84.9 70

----------419.2 70

27 215.7 80

28 24,674.8 8173 4,439.2 8178 5,646.5 8192 703.3 8193 158.4 8194 42.7 81

----------35,664.9 81

44 331.0 8362 285.5 8364 131.6 83

PAGE

ALPHACODE

Tundra - Mat and Cushion

Freshwater Wetland - Sphagnum-Shrub Bog

Cultural Influences

Mud Flats

Rock

Glacier

D-23

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VEGETATION BY POLYGON - HEALY AS

PAGE 4

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POLYGON TOTAL NUMERICNUMBER ACRES CODE

67 250.2 83----------

998.3 83

88 135.2 91==========

156,238.5

ALPHACODE

Glacier

Lakes greater than 40 acres

D-24

ALASKA SUSITNA RIVERBASINUPPER SUSITNA SUBBASIN

VEGETATION BY POLYGON - HEALY A6

POLYGON TOTAL NUMERIC ALPHANUMBER ACRES CODE CODE

7 23.2 21 Closed White Spruce, Short10 407.4 2112 2,969.2 2116 438.2 2122 727.3 2159 51.9 2160 182.1 2163 766.7 21

----------5,566.0 21

37 310.7 25 Closed \rhite Spruce,Tall

79 16.9 28 Closed Cottonwood,Medium-aged

6 814.5 31 Open \rhite'Spruce,Short23 313.6 3133. 104.6 31

----------1,232.7 31

47 238.2 32 Open Deciduous Mixed,Medium-aged66 289.3 32

----------527.5 32

2 457.3 60 Tall Shrub - Alder5 1,444.7 60

11 29,782.7 6021 84.9 6027 1,653.6 6028 366.3 6051 1,245.6 6071 88.8 6073 314.2 6075 115.0 60

----------35,553.1 60

4 57.0 61 Tall Shrub - Alder-Willow14 1,941.7 61

D-25

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VEGETATION BY POLYGON - HEALY A6

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38 32.9 6140 148'.0 6148 88.3 6164 221.1 6170 155.2 6180 14.8 61

---------2,659.1 61

44 44.6 63

65 50.0 6469 172.9 6472 74.7 6477 81.3 64

----------378.9 64

8 21.9 659 96.7 65

17 194.3 6518 441.8 6519 654.1 6525 136.2 6529 142.9 6534 55.4 6549 25.5 6550 6,113.3 6552 2,768.3 6556 401.7 6557 72.7 6578 110.5 65

----------11)235.4 65

61 1)243.1 6776 95.9 67

----------1)339~O 67

20 114.7 69

PAGE

ALPHACODE

Tall Shrub - Alder-Willow

Grassland

Tundra - Sedge Grass

Tundra - Herbacious

Tundra - Mat and Cushion

Freshwater Wetland - Sphagnum-Shrub Bog.

D-26

2

PAGE

ALASKA SUSITNA RIVERBASINUPPER SUSITNA SUBBASIN

VEGETATION BY POLYGON - HEALY A6

3

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[POLYGON TOTAL NUMERIC

NUMBER ACRES CODE

26 155.8 6930 117.9 6932 51.1 6935 128.7 6936 411.3 6941 92.7 6942 53.9 6943 134.8 6945 52.8 6946 103.9 6955 98.6 6968 110.9 69

----------1)626.9 69

3 660.6 8024 626.3 8054 61.9 8067 214.5 80

----------1)563.2 80

53 854.6 8158 63.6 8162 262.2 81

---------1)180.4 81

74 112.9 83

13 137.3 9115 119.1 9131 45.3 9139 74.4 91

----------376.1 91

===========

63)723.4

ALPHACODE

Freshwater Wetland - Sphagnum-Shrub Bog

Hud Flats

Rock

Glacier

Lakes greater than 40 acres

D-27

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VEGETATION BY POLYGON - HEALY B4

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POLYGON TOTAL NUMERICNUMBER ACRES CODE

4 446.9 616 217.8 619 36.9 61

----------701.6 61

3 4,387.2 627 270.4 62

10 19.6 62----------

4,677.1 62

2 6)025.3 655 3)405.8 65

----------9,431.1 65

11 10.6 67

8 108.9 91=======:::i==

14)929.3

ALPHACODE

Tall Shrub - Alder-Willow

Low Shrub - Willow Resin Birch

Tundra - Herbacious

Tundra - Hat and Cushion

Lakes greater than 40 acres

D-28

ALASKA SUSITNA RIVERBASINUPPER SUSITNA SUBBASIN

VEGETATION BY POLYGON - HEALY B5

POLYGON TOTAL NUMERIC ALPHANUMBER ACRES CODE CODE

2 1,089.5 60 Tall Shrub - Alder4 3,876.9 608 1,210.4 60

14 371.1 6015 1,061.1 6024 25.4 6025 37.3 60

----------7,671.7 60

5 170.3 61 Tall Shrub - Alder-Willow6 128.9 61

12 1,294.3 6121 49.9 61

---------1,643.3 61

3 3,805.7 62 Low Shrub - Willow Resin Birch9 585.6 62

11 108.8 6213 2,281.5 6216 949.3 6220 59.0 62

----------7,78.9.9 62

7 1,613.1 65 Tundra - Herbacious17 264.5 6526 4.0 65

---------1,881.6 65

18 931.4 67 Tundra - Mat and Cushion23 399.7 67

----------1,331.1 67

19 148.8 69 Freshwater Wetland - Sphagnum-Shrub Bog

10 34.5 70 Cultural Influences22 84.3 70

----------118.8 70

==========

20,585.3

D-29

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VEGETATION BY POLYGON - TALKEETNA Cl

[

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POLYGON TOTAL NUMERICNUMBER ACRES CODE

5 1,702.0 31

9 1,051.9 3212 36.6 3214 26.5 32

----------·1,115.0 32

7 154.8 6010 217.6 60

----------372.4 60

3 127.8 614 109.1 618 40.8 61

13 28.7 6115 3.6 61

----------310.0 61

6 212.9 6211 153.3 62

----------366~2 62

2 588.6 97==========

I

4,454.2

ALPHACODE

Open White Spruce, Short

Open Deciduous Mixed,Medium-aged

Tall Shrub - Alder

Tall Shrub - Alder-Willow

Low Shrub - Willow Resin Birch

Rivers greater than 1/8 mile

D-30

ALASKA SUSITNA RIVERBASINUPPER SUSITNA SUBBASIN

VEGETATION BY POLYGON - TALKEETNA MOUNTAINS Al

POLYGON TOTAL NUMERICNUMBER ACRES CODE

13 515.2 33

6 165.6 437 174,,3 43

----------339.9 43

2 16,738.5 62

3 6,641.8 658 5,731.0 659 775.0 65

----------13,147.9 65

4 605.3 665 . 720.8 66

12 3,942.5 66----------

5,268.6 66

10 111.1 6911 77.4 69

----------1~.8 .4 69

14 4.1 91::=::========

36,202.6

ALPHACODE

Open Hhfte Spruce,Tall

Open Black Spruce,Short

Low Shrub - Willow Resin Birch

Tundra - Herbacious

Tundra - Shrub

Freshwater Wetland - Sphagnum-Shrub Bog

Lakes greater than 40 acres

D-31

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VEGETATION BY POLYGON - TALKEETNA MOUNTAINS A3

POLYGON TOTAL NUMERIC ALPHANUMBER ACRES CODE CODE

22 62.4 91 Lakes greater than 40 acres27 64.0 9128 37.7 91

----------164.1 91

===========

34,680.3

D-33

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UPPER SUSITNA SUBBASIN

l'VEGETATION BY POLYGON - TALKEETNA MOUNTAINS A4

POLYGON TOTAL NUMERIC ALPHANUMBER ACRES CODE CODE l:

19 1,070.7 81 Rock20 181.8 81 r24 210.7 8128 127.1 8132 3,608.3 81

l~36 1,601.8 8143 1,276.1 8152 320.7 81

F59 212.1 8160. 11.9 81 \.-,62 51.3 8167 228.1 81 [70 480.6 81 L71 403.1 8176 205.6 81

L79 237.1 8182 71.2 8184 4,236.4 81

r89 365.5 8191 282.3 81 \'cc'93 74.8 8196 86.9 81

C'101 98.1 81-,102 304.5 81

103 80.4 81[----------

18,635.9 81

26 141.9 82 Snowfield C27 88.5 82 L_.1

29 61.7 8233 122.1 82 L39 62.1 8241 123.8 8251 147.4 82

[54 5,912.7 8269 197.6 8273 1,427.4 82 r·83 281.3 82

L87 678.1 8292 193.2 82

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VEGETATION BY POLYGON - TALKEETNA MOUNTAINS A4

POLYGON TOTAL NUMERIC ALPHANUMBER ACRES CODE CODE

100 203.0 82 Snowfield----------

9,640.7 82

5 3,032.9 83 Glacier7 8,207.9 83

11 494.8 8315 121.4 8316 133.2 8318 518.6 8321 1,172.4 8322 393.0 8323 155.1 8325 1,261.4 8331 174.9 8334 590.8 8338 9,255.2 8344 143.8 8346 6,406.1 8349 503.4 8355 282.4 8356 11,498.6 8357 455.1 8358 1,003.1 8363 128.2 8365 326.4 83

·66 189.8 8368 143.7 8372 305.9 8374 391.3 8377 1,161.4 8381 1,713.6 8386 12,359.2 8388 5,432.7 8390 222.4 8395 333.3 8399 1,006.9 83

105 45.3 83----------

69,564.0 83

D-36

PAGE 3

ALASKA SUSITNA RIVERBASINUPPER SUSITNA SUBBASIN

VEGETATION BY POLYGON - TALKEETNA MOUNTAINS A4

TOTAL NUMERICACRES CODE

POLYGONNUMBER

13 90.6===========

172,378.6

91

ALPHACODE

Lakes greater than 40 acres

D-37

PAGE 4

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VEGETATION BY POLYGON - TALKEETNA HOUNTAINS AS

POLYGON TOTAL NUMERIC ALPHANUMBER ACRES . CODE CODE

6 2,883.5 24 Closed Deciduous Mixed,Medium-aged11 320.0 2450 2,650.9 24

----------5,854.4 24

55 ·119.0 41 Closed Black Spruce,Short

8 2,421. 7 60 Tall Shrub - Alder12 76.7 6016 1,849.7 6018 527.0 6024 397.4 6025 83.2 6028 3,712.5 6043 5,059.3 6054 2,264.4 60

----------16,392.0 60

17 85.8 61 Tall Shrub - Alder-Willow

3 93.1 65 Tundra ~ Herbacious5 785.5 659 49,541.8 65

13 129.1 6514 133.0 6515 118.3 6519 llO.1 6520 75.5 6522 251.7 6530 31,044.9 6536 445.3 6549 407.9 6551 240.8 6552 160.8 6556 289.8 6557 62.4 65

----------83,890.0 65

Ir38

ALASKA SUSITNA RIVERBASINUPPER SUSITNA SUBBASIN

VEGETATION BY POLYGON - TALKEETNA MOUNTAINS A5

POLYGON TOTAL NUMERICNUMBER ACRES CODE

2 11.9 674 6,897.2 67

10 52,010.7 6721 5,594'.2 67

----------64,514.0 67

53 30.9 69

7 1,268.1 80

40 104.6 82

26 107.9 8327 780.8 8331 335.1 8332 182.7 8333 114.8 8334 2-33.0 8335 1,148.6 8337 1,824.7 8338 73.0 8339 368.0 8341 162.3 8342 310.2 8344 904.8 8345 71.1 8346 90.5 8347 97.4 8348 236.3 83

----------7,041.2 83

23 103.0 9129 63.4 91

----------166.3 91

==========179,466.3

PAGE

ALPHACODE

Tundra - Mat and Cushion

Freshwater Wetland - Sphagnum-Shrub Bog

Mud Flats

Snowfield·

Glacier

Lakes greater than 40 acres

D-39

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VEGETATION BY POLYGON - TALKEETNA MOUNTAINS A6

POLYGON .TOTAL NUMERIC ALPHANUMBER ACRES CODE. CODE

40 112.3 22 Closed Deciduous Mixed,Young

36 1,588.8 24 Closed Deciduous Mixed,Medium-aged46 102.2 24

----------1,691.0 24

18 1,606.6 25 Closed l~ite Spruce,Tall30 129.9 25

----------1,736.5 25

10 211.0 26 Closed Deciduous Mixed,Old

7 134.1 31 Open White Spruce, Short

22 44.1 41 Closed Black Spruce,Short24 6.0 4131 42.6 4133 41.5 4134 81.1 4135 78.5 4137 49.9 4141 579.4 4143 103.5 4145 91.1 41

----------1,117.7 41

3 7,849.6 60 Tall Shrub - Alder12 25,856.4 6014 51.6 6023 15.7 6029 293.2 6032 4,409.6 6048 3,699.5 60

----------42,175.5 60

8 26.4 ,~ Tall Shrub - Alder-WillowOl.

11 972.2 61

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VEGETATION BY POLYGON - TALKEETNA MOUNTAINS Bl

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POLYGON TOTAL NUMERIC~'UMBER ACRES CODE

5 66.8 4321 162.1 4322 97.4 43

----------326.4 43

2 38~799.2 62

19 950.0 6520 20~798.9 65

---------21~748.9 65

15 285.6 6616 330.6 6617 8~509.7 6618 4~784.5 66

----------13~910.5 66

3 2 t206.6 6924 1~026.9 6925 468.7 69

----------3~702.2 69

4 192.6 916 10.2 917 66.9 918 76.6 919 157.2 91

10 308.2 9111 182.7 9112 154.3 9113 53.9 9114 71.6 9123 44.9 9126 23.0 9127 48.3 91

----------1 t390.2 91

==========79 t877.4

ALPHACODE

Open Black SprucetShort

Low Shrub - Willow Resin Birch

Tundra - Herbacious

Tundra - Shrub

Freshwater Wetland - Sphagnum-Shrub Bog

Lakes greater than 40 acres

D-42

ALASKA SUSITNA RIVERBASINUPPER SUSITNA SUBBASIN

VEGETATION BY POLYGON - TALKEETNA MOUNTAINS B3

691.4 60

TOTAL NUMERICACRES CODE

Open White Spruce~Short

ALPHACODE

Tall Shrub - Alder

Tall Shrub - Alder-Willow

Low Shrub - Willow Resin Birch

31

626262

61

6060

303.4

50.5640.9

57.3

1~788.0

60.499.8

91927

18

1621

26

POLYGONNUMBER

62 CL

3 407.14 78.15 1~680.5

6 16~085.3

8 595.611 106.415 254.823 3~583.2

35 1~397.7

36 43.7.739 146.842 17.6

24,790.8

38 463.8

2 58~542.0

25 739.730 108.831 29.934 1,609.4

656565656565656565656565

65

66

6767676767

Tundra - Herbacious

Tundra - Shrub

Tundra - Mat and Cushion

61,029.8 67

13 856.0 80 Hud Flats

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ALASKA SUSITNA RIVERBASINUPPER SUSITNA SUBBASIN

VEGETATION BY POLYGON - TALKEETNA MOUNTAINS B4

POLYGON TOTAL NUMERIC ALPHANUMBER ACRES CODE CODE

15 59.4 25 Closed lfuite Spruce,Tall

3 235.8 60 Tall Shrub - Alder21 114.8 6024 832.5 6032 41.3 6034 139.4 6044 147.5 60

---------l,511.2 60

19 47.3 61 Tall Shrub - Alder-Willow43 70.5 61

----------117.8 61

5 247.1 62 Low Shrub - Willow Resin Birch6 5,702.4 628 4,685.4 62

23 1,179.8 62----------

11,814.7 62

41 270.5 64 Tundra - Sedge Grass

2 3)321.2 65 Tundra - Herbacious4 7,437.4 659 5,589.0 65

14 5,535.3 6517 17.1 6518 18,898.8 6520 92.0 6525 3,734.9 6528 50.0 6529 1,320.4 6531 318.8 6533 104.5 6537 201.2 6539 326.6 6542 176.6 6546 136.1 65

D-45

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PAGE 2

ALASKA SUSITNA RIVERBASINUPPER SUSITNA SUB~ASIN

VEGETATION BY POLYGON - TALKEETNA MOUNTAINS B4

POLYGON TOTAL NUMERIC ALPHANUMBER ACRES CODE CODE

47 75.1 65 Tundra - Herbacious50 432.7 65

----------47,767.6 65

36 249.7 66 Tundra - Shrub

10 1,006.0 67 Tundra - Mat and Cushion11 67,135.1 6712 717.8 6713 4,292.5 6716 491.1 6722 329.3 6727 14,379.2 6730 16,058.4 6735 184.9 6738 416.7 6745 3,379.5 6748 3,703.8 6749 1,557.6 67

----------113,651.8 67

7 2,2q5.8 80 Mud Flats

40 301.7 83 Glacier51 53.3 8352 68.5 83

---------423.6 83

26 73.3 97 Rivers greater than 1/8 mile=======-===

178,145.3

D-46

ALASKA SUSITNA RIVERBASINUPPER SUSITNA SUBBASIN

VEGETATION BY POLYGON - TALKEETNA MOUNTAINS B5

525.7 22

12,782.1 24[LOpen l~ite Spruce,Short

Closed Deciduous Mixed,Medium-aged

ALPHACODE

Closed Deciduous Mixed)Young

3131

24242424

222222

380.273.771.8

TOTAL NUMERICACRES CODE

6,820.44,802.5

346.4812.7

8 16.49 816.8

20546667

263676

POLYGONNUMBER

833.2

15 1,632.048 349.8

1,981.8

25 202.529 106.032 55.439 297.547 227.553 303.168 59.269 101.172 118.775 69.679 57.7

1,598.5

41 47.5

31

3232

32

4141414141414141414141

41

42

Open Deciduous Mixed,Medium-aged

Closed Black Spruce)Short

Closed Black Spruce,Tall

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L4 5)932.0

10 4,185.96060

Tall Shrub - Alder r'L

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PAGE 2

ALASKA SUSITNA RIVERBASINUPPER SUSITNA SUBBASIN

VEGETATION BY POLYGON - TALKEETNA MOUNTAINS B5

POLYGON TOTAL NUMERIC ALPHANUMBER ACRES CODE CODE

34 27,595.9 60 Tall Shrub - Alder52 20.6 6074 12.2 60

----------37,746.6 60

28 55.5 61 Tall Shrub - Alder-Willow33 256.7 6135 68.9 6164 335.8 6170 775.3 61

----------1,492.1 61

7 72.5 62 Low Shrub - Willow Resin Birch12 11.4 6213 2,370.3 6224 192.7 6230 161.2 6238 226.4 62

----------3,034.5 62

49 60.1 63 Grassland

2 2,078.4 65 Tundra - Herbacious5 12.9 656 580.4 65

21 819.1 6523 14,455.8 6527 43.2 6531 89.0 6537 16,861.5 6563 779.9 6565 340.8 6571 92.6 6573 9,488.9 6577 729.7 6578 472.0 6581 248.9 6583 921.3 65

D-48

ALASKA SUSITNA RIVERBASINUPPER SUSITNA SUBBASIN

VEGETATION BY POLYGON - TALKEETNA MOUNTAINS B5

POLYGON TOTAL NUMERICNUMBER ACRES CODE

85 69.2 65----------

48,083.6 65

14 166.2 66

3 1,152.6 6711 4,597.2 6716 28,505.2 6717 84.1 6718 228.7 6719 730.6 6722 197.4 6742 6,788.1 6746 2,851.5 6756 3,601.2 6760 18,15i.1 6780 787.6 - 67

----------67,675.4 67

45 188.8 6950 102.3 6951 100.6 6955 93.5 6958 156.1 6959 71.1 6961 126.3 6962 306.1 6984 63.6 69

----------1,208.6 69

82 228.3 80

40 52.5 J143 47.0 9144 47.2 9157 276.3 91

----------423.0 91

==========

177,887.4

PAGE

ALPHACODE

Tundra - Herbacious

Tundra - Shrub

Tundra - Mat and Cushion

Freshwater Wetland - Sphagnum-Shrub Bog

Mud Flats

Lakes greater than 40 acres

D-49

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[ ALASKA SUSITNA RIVERBASINUPPER SUSITNA SUBBASIN

[ VEGETATION BY POLYGON - TALKEETNA MOUNTAINS B6

POLYGON TOTAL NUMERIC ALPHAl'."UMBER ACRES CODE CODE

[8 147.5 24 Closed Deciduous Mixed,Medium-aged

11 382.6 24

[~----------

530.1 24

[' 2 1,059.3 60 Tall Shrub - Alder6 15.5 607 349.8 60

12 728.3 60f' 14 161.9 60L..; 15 12,227.9 60

----------[ 14,542.8 60

9 80.7 61 Tall Shrub - Alder-Willowr-'

L 22 21.2 64 Tundra - Sedge Grass23 12.7 64 .

----------

6 34.0 64

4 3.9 65 Tundra - Herbacious

C 5 1,049.1 6513 3,330.2 6516 69.0 65

C17 2,988.1 6518 125.7 6519 43.7 65

,--, 20 43.8 65

L 24 44.9 6525 225.3 6526 1,395.8 65

[ 27 386.8 6528 93.2 6529 105.1 65

L30 98.1 6531 216.6 6532 56.3 6533 62.2 65r' 34 121.6 65L ----------

10,459.5 65f'I"-"

L D-50

ALASKA SUSITNA RIVERBASINUPPER SUSITNA SUBBASIN

VEGETATION BY POLYGON - TALKEETNA MOUNTAINS B6

TOTAL NUMERICACRES CODE

POLYGONNUMBER

3

10

21

869.1

102.5

26.4==========

26,645.1

67

80

92

ALPHACODE

Tundra - Mat and Cushion

Mud Flats

Lakes at least 10 acres

D-51

PAGE 2

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VEGETATION BY POLYGON - TALKEETNA MOUNTAINS C1

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POLYGON TOTAL NUMERICNUMBER ACRES CODE

6 388.4 33

15 129.8 43

2 1,972.5 624 8,099.2 62

16 68.3 62----------

10,140.1 62

5 505.7 697 197.2 69

----------703.0 69

3 51&1 918 100.4 919 63.6 91

10 183.8 9111 193.7 9112- 50.6 9113 238.6 9114 261.9 9117 18.0 91

----------1,161.7 91

==========12,523.0

ALPHACODE

Open White Spruce,Tall

Open Black Spruce,Short

Low Shrub - Willow Resin Birch

Freshwater Wetland - Sphagnum-Shrub Bog

Lakes greater than 40 acres

D-52

ALASKA SUSITNA RIVERBASINUPPER SUSITNA SUBBASIN

VEGETATION BY POLYGON - TALKEETNA MOUNTAINS

POLYGONNUMBER

3

245

TOTAL NUMERICACRES CODE

2,698.6 65

4,887.6 674,069.6 67

267.1 67

9,224.2 67==========

11,922 ..8

ALPHACODE

Tundra - Herbacious

Tundra - Mat and Cushion

D-53

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VEGETATION BY POLYGON - TALKEETNA MOUNTAINS C4

POLYGON TOTAL NiJMERIC ALPHANUMBER ACRES CODE CODE

57 435.9 22 Closed Deciduous Mixed,Young

12 125.1 31 Open White Spruce,Short15 100.7 3116 67.3 3117 143.8 31

----------436.9 31

4· 765.6 60 Tall Shrub - Alder14 61.1 6021 9.2 6025 365.9 6030 4,956.0 6042 4,571.6 6065 127.6 60

----------10,857.1 60

11 178.0 61 Tall Shrub - Alder-tfillow29 892 .6 6154 76.6 6162 175.4 61

----------1,322.6 61

3 534.2 62 Low Shrub - Willow Resin Birch6. 274.3 628 19,965.0 62

23 510.6 6239 409.8 6244 40.4 6246 35.5 6248 12,251.2 62

----------34,020.9 62

10 44.6 64 Tundra - Sedge Grass27 72.6 6428 58.7 64

----------175.9 64

D-54

POLYGONNUMBER

ALASKA SUSITNA RIVERBASINUPPER SUSITNA SUBBASIN

VEGETATION BY POLYGON - TALKEETNA MOUNTAINS c4TOTAL NUMERIC ALPHAACRES CODE CODE

PAGE 2

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5 908.1 657 80.0 65

18 403.7 6520 7,691.9 6522 1,074.9 6531 283.3 6537 579.0 6538 129.9 6540 344.2 6541 5,865.8 6547 504.2 6549 71.3 6550 8,310.5 6553 36.8 6555 982.4 6556 1,434.6 6559 263.2. 6560 111.4 6564 107.8 6566 49.4 65

----------29,232.6 65

13 855.7 66

2 5.7.3 6719 2,411.3 6724 1,058.4 6726 2,743.8 6733 101.9 6735 1,346.3 6736 44,987.4 6743 564.5 6745 612.5 6761 227.4 67

----------54,110.7 67

51 439.4 8058 858.3 8063 309.6 80

----------1,607.3 80

Tundra - Herbacious

Tundra - Shrub

Tundra - Mat and Cushion

Mud Flats

D-55

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VEGETATION BY POLYGON -TALKEETNA MOUNTAINS C4

POLYGON TOTAL NUMERIC ALPHANUMBER ACRES CODE CODE

9 904.9 91 Lakes greater than 40 acres32 78.2 9134 80.7 9152 119.7 91

----------1,183.6 91

==========134,239.1

D-56

PAGE 3

ALASKA SUSITNA RIVERBASINUPPER SUSITNA SUBBASIN

VEGETATION BY POLYGON - TALKEETNA MOUNTAINS C5

POLYGON TOTAL NUMERIC ALPHANUMBER ACRES CODE CODE

49 10,098.9 31 Open \-lhite Spruce,Short

26 119.6 32 Open Deciduous Mixed,Medium-aged

6 19,027.9 60 Tall Shrub - AlderIS 6,141.6 6017 663.6 6023 99.4 6025 1,327.4 6045 194.1 6047 280.1 6052 48.3 6057 294.2 6060 7,162.6 6077 89.7 6087 16.8 6094 641.3 6095 217.6 60

102 12.6 60----------

36,217 .2 60

35 210.9 61 Tall Shrub - Alder-Willow38 50.8 6146 1Z4.2 6186 110.5 61

----------496.4 61

8 25.6 62 Low Shrub - Willow Resin Birch9 11,143.9 62

10 3,963.0 6230 199.0 6231 651.5 6239 195.5 6241 624.9 6253 105.1 6269 230.0 6272 390.7 6279 278.4 6281 116.9 62

D-57

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[ PAGE 2ALASKA SUSITNA RIVERBASIN

UPPER SUSITNA SUBBASIN

[VEGETATION BY POLYGON - TALKEETNA MOUNTAINS C5

POLYGON TOTAL NUMERIC ALPHANUMBER ACRES CODE CODE

r. 91 282.7 62 Low Shrub - Willow Resin Birch98 .29.4 62

100 53.7 62

/"----------

18,290.3 62

[7 611.1 64 Tundra - Sedge Grass

12 98.9 6414 91.7 6416 89.5 64r 32 95.9 64

L,_.,.; 37 253.1 6471 1,254.5 64

r 83 620.7 64t 84 316.4 64

----------r"" 3 ,431. 7 64

L 5 303.5 65 Tundra - Herbacious11 693.8 65

E 13 169.6 6522 86.0 6536 348.7 65

k '43 159.2 6556 162.7 6558 98.1 65

[59 92.2 6561 92.4 6562 121.6 6565 68.6 65

C 68 1,136.9 6570 328.5 6576 1,038.0 65

[ 78 1,194.1 6580 186.4 6582 10.9 65

L90 1,729.6 6593 138.6 6596 476.4 6599 33.5 65I . 101 34.7 65

L ----------8,704.0 65

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ALASKA SUSITNA RIVERBASINUPPER SUSITNA SUBBASIN

VEGETATION BY POLYGON - TALKEETNA MOUNTAINS C5

POLYGON TOTAL NUMERIC ALPHANUMBER ACRES CODE CODE

2 4,050.8 67 Tundra - Mat and Cushion3 38,294.9 674 101.2 67

18 5,302.2 6719 80.4 6720 69.2 6724 210.7 6727 194.6 6728 82.2 6729 74.9 6733 112.5 6734 398.3 6748 127.1 6750 73.6 6763 567.4 6766 356.1 6767 533.5 6773 3,882.2 6774 860.6 6775 8,876.2 6785 88 •.4 6788 2,720.9 6789 213.6 6792 291.6 6797 236.9 67

----------67,800.0 67

54 475.7 80 Mud Flats

21 65.0 91 Lakes greater than 40 acres40 80.0 9142 84.5 9144 165.9 9151 52.3 "9155 71.5 9164 83.6 91

----------602.7 91

==========

146,236.7

0-59

PAGE 3

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ALASKA SUSITNA RIVERBASINUPPER SUSITNA SUBBASIN

VEGETATION BY POLYGON - TALKEETNA MOUNTAINS C6

POLYGON TOTAL NUMERIC ALPHANUMBER ACRES CODE CODE

3 603.3 24 Closed Deciduous Mixed,Medium-aged13 2,816.4 2437 79.3 24

----------3,499.0 24

32 105.3 28 Closed Cottonwood,Medium-aged40 172.2 2843 90.7 28

---------368.2 28

25 120.5 31 Open White Spruce,Short"30 3,429.0 3159 56.1 31

---------3,605.6 31

33 4,082.5 32 Open Deciduous Mixed,Medium-aged65 57.3 32

----------4,139.7 32

5 42,339.6 60 Tall Shrub - Alder36 8,606.6 6060 1,750.7 6064 177.5 6071 1,604.4 60

-----...----54,478.8 60

4 173.9 61 Tall Shrub - Alder-Willow8 14.4 61

11 127.3 6112 55.2 6114 410.8 6116 98.9 6117 105.7 6119 107.8 6128 983.6 6152 1,274.6 61

----------3,352.3 61

D-60

ALASKA SUSITNA RIVERBASINUPPER SUSITNA SUBBASIN

VEGETATION BY POLYGON - TALKEETNA MOUNTAINS C6

POLYGON TOTAL NUMERICNUMBER ACRES CODE

21 586.9 6246 52.1 6256 154.8 62

----------793.9 62

22 9.3 6523 563.4 6538 1)418.6 6555 455.0 65

.70 316.4 6573 31.0 65

----------2,793.6 65

2 60.2 6610 683.3 6615 2,253.4 6626 483.1 6627 333.8 6644 290.0 6648 99.2 66

----------4,203.0 66

6 1,325.9 679 15,106.2 67

18 92.4 6720 630.8 6724 6,292.8 6729 86.1 6731 1,239.4 6734 201.7 6735 1,426.2 6739 88.7 6741 2,815.3 6742 414.7 6745 143.8 6747 100.0 6749 68.9 6750 6,983.8 67

ALPHACODE

Low Shrub - Willow Resin Birch

Tundra - Herbacious

Tundra - Shrub

Tundra - Mat and Cushion

D-61

PAGE 2

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ALASKA SUSITNA RIVERBASINUPPER SUSITNA SUBBASIN

VEGETATION BY POLYGON - TALKEETNA MOUNTAINS C6

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POLYGON TOTAL NUMERICNUMBER ACRES CODE

51 290.8 6753 193.2 6754 828.1 6757 356.8 6758 78.1 6761 157.6 6762 288.8 6763 93.2 6766 65.1 6767 19.9 6768 25.9 6769 6.4 6772 19.4 6774 597.2 6775 10.1 6776 56.0 67

----------40»103.3 67

7 1,822.9 97===========

119,160.2

ALPHACODE

Tundra - Mat and Cushion

Rivers greater than 1/8 mile

D-62

PAGE 3

ALASK~ SUSITNA RIVERBASINUPPER SUSITNA SUBBASIN

VEGETATION BY POLYGON - TALKEETNA MOUNTAINS D5

[

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LPOLYGON TOTAL . NUMERIC

NUMBER ACRES CODE

2 203.6 605 181.0 . 60

----------384.7 60

3 912.1 62

10 253.7 65

6 39.8 677 34.8 679 139.0 61

11 1,355.0 67----------

1,568.6 67

4 353.6 818 264.8 81

--~-------

618.4 81===========

3,737.4

ALPHACODE

Tall Shrub - Alder

Low Shrub - lo1illow Resin Birch

Tundra - Herbacious

Tundra - Mat and Cushion

Rock

D-63

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VEGETATION BY POLYGON - TALKEETNA MOUNTAINS D6

POLYGON TOTAL NUMERIC ALPHANUMBER ACRES CODE CODE

4 560.2 21 Closed White Spruce,Short30 82.8 2132 687.2 2134 207.3 2135 199.4 21

----------1,736.8 21

61 722.4 22 Closed Deciduous Mixed,Young

48 563.5 24 Closed Deciduous Mixed,Medium-aged58 3,989.4 2466 4,301.2 2472 499.7 2473 332.0 2479 619.7 24

----------10,305.4 24

10 48.6 28 Closed Cottonwood,Medium-aged65 4.9 "2867 275.8 2869 170.0 28

----------499.3 28

62 28.3 29 Closed Cottonwood,Old64 64.3 29

----------92.6 29

45 665.4 31 Open White Spruce,Short52 121.6 31

----------787.0 31

15 239.6 32 Open Deciduous Mixed,Medium-aged47 408.0 3250 2,434.7 32

----------3,082.3 32

D-64

ALAS~~ SUSITNA RIVERBASINUPPER SUSITNA SUBBASIN

VEGETATION BY POLYGON - TALKEETNA MOUNTAINS D6

TOTAL NUMERICACRES CODE

POLYGONN1J}ffiER

40

68

366.2

101.9

34

42

ALPHACODE

Open. Deciduous Mixed.Old

Closed Black Spruce,Tall

PAGE 2

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r2 4,204.85 262.66 183.59 181.9

12 4,266.114 128.617 9,754.644 76.754 807.559 297.860 986.970 3.211.0

----------24.362.0

16 197.118 18.424 322.041 47.649 85.553 409.571 110.977 448.481 37.0

----------1.676.5

38 113.542 3,356.055 2,866.7

----------6,336.2

13 21.020 27.325 50.826 143.6

60 Tall Shrub - Alder6060606060606060606060

60

61 Tall Shrub - Alder-Willow6161616161616161

61 .

62 Low Shrub - Willow Resin Birch6262

62

64 Tundra - Sedge Grass646464

D-65

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PAGE

ALASKA SUSITNA RIVERBASINUPPER SUSITNA SUBBASIN

VEGETATION BY POLYGON - TALKEETNA MOUNTAINS D6

500.1 64

TOTAL NUMERICACRES CODE

3

ALPHACODE

Tundra - Herbacious

Tundra - Sedge Grass64646464

656565656565

101.276.836.742.7

609.91)097.6

127.1223.0723.8435.3

27313337

32122397578

POLYGONNUMBER

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3,216.8

80 204.0

7 1)333.98 40.0

28 7,239.929 245.736 114.774 3,377.2

12)351.5

19 7.343 122.146 269.956 270.576 88.3

758.1

51 36.9

65

66

676767676767

67

6969696969

69

70

Tundra - Shrub

Tundra - Mat and Cushion

Freshwater Wetland - Sphagnum-Shrub Bog

Cultural Influences

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23

434.3

3,036.5

80

83

Mud Flats

Glacier

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ALASKA SUSITNA RIVERBASTNUPPER SUSITNA SUBBASIN

VEGETATION BY POLYGON - TALKEETNA MOUNTAINS D6

POLYGON TOTAL NUMERIC ALPHANUMBER ACRES CODE CODE

57 134.4 91 Lakes greater than 40 acres

63 1,012.3 97 Rivers greater than 1/8 mile===:::1=======

71,753.5

D-67

PAGE 4

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APPENDIX E

UPPER SUSITNA

GRID MAP LEGENDS AND STATISTICS

a) Areas A. B. D & E

b) Area C

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CLASS

0-3% Slope

3-7% Slope

7-12% Slope

12-20% Slope

20-30% Slope

30-40% Slope

Greater Than 45% Slope

CH-138

SLOPEUPPER SUSITNA SUBBASIN

Areas A, B, D & E

TOTAL AREA (Acres)

143,520

131,560

269,200

332,240

350,560

271 ,480

391,160

E-2

%

7.59

6.96

14.25

17.58

18.55

14.37

20.70

CLASS

Non-Vegetated

Closed Forests

Open Forests

Fresh Water Wetlands

Salt Water Wetlands

Shrub

Tundra

Grass1c:md

eli-I'=;3

RANGE SUITABILITYUPPER SUSITNA SUBBASIN

Areas A, B, D & E

TOTAL AREA (Acres)

217,520

57,680

32,000

5,400

o

469,040

1,106,960

1,120

E-3

%

11.51

3.05

1.69

0.29

0.00

24.82

58.58

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FOREST SUITABILITYUPPER SUSITNA SUBBASI~

Areas A, B, D & E

CLASS TOTAL AREA (Acres) %

Non-Forest 1,800,040 95.25

Open Cottonwood 0 0.00

Closed Cottonwood 840 0.04

Open Mixed Forest 11 ,600 0.61

Closed Mixed Forest 39,600 2.10

Open Black Spruce 0 0.00

Closed 11ack Spruce 3,040 0.16

Open \-ihite Spruce 20,400 1.08

Closec h~ite Spruce, Hemlock 14,200 0.75

[ E-4

CLASS

I-later

Low

Low/Hoderate

Hoderate

Hoderate/High

High

Very High

eli-U8

EROSION H.t\.ZARDUPPER SUSITNA SUBBASIN

Areas A, B, D & E

TOTAL AREA (Acres)

8,240

135,440

131,440

269,160

332,240

350;560

662,640

E-5

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%

0.44

7.17

6.96

14.24

17.58

18.55

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CLASS

High

Noderate

Low

Unsuitable

Ch-138

CAPABILITY FOR URBAN DEVELOPMENTUPPER SUSITNA SUBBASIN

Areas A, B, D & E

TOTAL AREA (Acres)

2,240

41,880

1,239,480

606,120

E-6

%

0.12

2.22

65.59

32 .• 07

HIGH SPECIES DIVERSITY/CAPABILITY

TOTAL AREA (Acres)

MODERATE SPECIES DIVERSITY/CAPABILITY

GENERAL HABITAT I - Nap AUPPER SUSITNA SUBBASIN

Areas A, B, C & E

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%

11 ,600 0.6120,400 1.0820,680 1.09

0 0.0037,720 2.0097,800 5.18

0 0.00

CLASS

Mixed Forest - OpenConifer Forest - OpenTall Shrub Alder - WillowDeciduous Forest - OpenMixed Forest - Closed·Low Shrub - Willow Resin BirchSalt Water Wetland, Grassland,

and Tidal Marsh

Conifer Forest - ClosedLOH Shrub SaltWater HetlandDeciduous Forest - ClosedShort Black Spruce - OpenSphagnum BogTall Shrub AlderGrassland

TUNDRA - SPECIAL CONSIDERATION

Tundrn

LOt\' SPECIES DIVERSITY/CAPABILITY

LOH Diversity/Capability

17,240o

2,720o

5,400342,440

1,120

1,115,080

209,240

0.910.000.140.000.29

18.120.06

59.01

11.07

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LLAKES AND STREfu~S - SPECIAL CONSIDERATION

Lakes and Streams 8,280 0.44 L[

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CH-UB E-7 L

TOTAL AREA (Acres)

GENERAL HABITAT II - Map BUPPER SUSITNA SUBBASIN

Areas A, B, D & E

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CLASS

High Diversity/Capability

Hoderate Diversity/Capability

Low Diversity/Capability

Tundra - Special Consideration

Lakes and Streams - Special

Consideration

CH-l38

188,200

368,920

209,240

1,115,080

8,280

E-8

%

9.96

19.52

11.07

59.01

0.44

HOOSE P.ABITATUPPER SUSITNA SUBBASIN

Areas'A) B, D & E

CL>\SS

Mod/High WR. (S,S,F) Range

Mod/Hi.gh (S, S) F) Range) No HR

LO\I1 to No Habitat

No Habitat

Hater

Abbreviations:

WR = Winter Range

S,S,F = Spring, Summer) Fall

CEl-Dc:

TOTAL AREA (Acres) %

452)800 23.96

109)440 5.79

1)319,120 69.81

80 0.00

8,280 0.44

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ROAD SUITABILITYUPPER SUSITNA SUBBASIN

Areas A, B, D & E

CLASS TOTAL AREA (Acres)

High Suitability 103,600

High/Moderate Suitability 49,800

Moderate Suitability 161,160

Low Suitability 574,080

Very Low Suitability 795,080

Extremely Low Suitability 206,000

%

5.48

2.64

8.53

30.38

42.07

10.90

Cli-U8 E-IO

CLASS

0-3% Slope

3-7% Slope

7-12% Slope

12-20% Slope

20-30% Slope

30-45% Slope

GreQter Than 45%

Cli- 1:31:>

SLOPEUPPER SUSITNA SUBBASIN

AREA C

TOTAL AREA (Acres) %

264,120 54.30

148,120 30.45

38,120 7.84

22,040 4.53

9,880 2.03

3,880 0.80

280 0.06

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CLASS

Non-Vegetated

Closed Forests

Open Forests

Fresh Water Wetlands

Salt Water Wetlands

Shrub

Tundra

Grassland

CE--138

RANGE SUITABILITYUPPER SUSITNA SUBBASIN

AREA C

TOTAL AREA (Acres)

44) 720

3,960

83)280

13,440

o

301)760

39)280

o

E-12

%

9.19

0.81

17.12

2.76

0.00

62.03

8.07

0.00

FOREST SUITABILITYUPPER SUSITNA SUBBASIN

AREA C

CLASS TOTAL AREA (Acres) %

Non-Forest 399,200 82.07

Open Cottonwood 0 0.00

Closed Cottonwood 240 0.05

Open Mixed Forest 0 0.00

Closed Mixed Forest 0 0.00

Open Black Spruce 39,280 8.07

Closed Black Spruce 0 0.00,

Open White Spruce 44,000 9.05

Closed Uhite Spruce, Hemlock 3,720 0.76

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EROSION HAZARDUPPER SUSITNA SUBBASIN

AREA C

CLASS TOTAL AREA (Acres) %

Water 44,720 9.19

Low 219,400 45.10

Low/t-lodera te 148,120 30.45

Hoderate 38,120 7.84

Hoderate/High 22,040 4.53

High 9,880 2.03

Very High 4,160 0.86

L CH-138 E-14

CLASS

High

Noderate

Low

Unsuitable

CH-138

CAPABILITY FOR URBAN DEVELOPNENTUPPER SUSITNA SUBBASIN

AREA C

TOTAL AREA (Acres)

o

47,160

373,520

65,760

E-15

%

0.00

9.69

76.79

13.52

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Tundra 89,160 18.33

LOW SPECIES DIVERSITY/CAPABILITY

Lew Diversity/Capability 0 0.00

LAKES AND STREAM - SPECIAL CONSIDERATION

Lakes and Str.eaI:1S 44,720 9.19

HIGH SPECIES DIVERSITY/CAPABILITY

TOTAL AREA (Acres)

GENERAL HABITAT I - Map AUPPER SUSITti~ SUBBASIN

AREA C

%

0.760.000.058.072.760.000.00

3,720o

24039,28013,440

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0 0.0044,000 9.05

0 0.000 0.000 0.00

251,880 51. 78

0 0.00

TUND~~ - SPECIAL CO~SIDERATION

Conifer Forest ClosedLm~ Shrub Salt Hater HetlandDeciduous Forest - ClosedShort Black Spruce - OpenSphagnum BogTall Shrub AlderGrassland

HODER.~TE SPECIES DIVERSITY/CAPABILITY

CLASS

Mixed Forest - OpenConifer Forest - OpenTall Shrub Alder - WillowDeciduous Forest - OpenNixed Forest - ClosedLow Shrub - Willow Resin BirchSal t \·]ater Wetland, Grassland

and Tidal Marsh

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GENERAL t~BITAT II - Map BUPPER SUSITNA SUBBASIN

AREA C

TOTAL AREA (Acres) 0//0

295.88CJ 60.83

56.880 11. 65

0 0.00

89.160 18.33

CLASS

High Diversity/Capability

Hoderate Diversity/Capability

Low Diversity/Capability

Tundra - Special Consideration

Lakes and Streams -

Special Consideration

E-17

44.720 9.19

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HOOSE HABITATUPPER SUSITNA SUBBASIN

AREA C

CLASS TOTAL AREA (Acr'es) %

Hod/High WR) (S,S,F) Range 47,960 9.86

Mod/High (S,S)F,) Range, No t-."R. 49)840 10.25

Low to No Habit2t 343)920 70.70

No Habitat 0 0.00\\i'ater 44) 720 9.19

Abbreviations:

WR = llinter Range

S,S,F = Spring, Summer, Fall

CH-138 E-18

High Suitability 268,200

Lot.. Sui tabili ty 37,920

Nodera te Sui tabili ty 65,600

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%

1.38

7.80

9.26

12.94

13.49

55.14

45,040

62,960

ROAD SUITABILITYUPPER SUSITNA SUBBASIN

AREA C

CLASS TOTAL AREA (Acres)

Very Low Suitability

High/Noderate Suitability 6,720.

Extremely Low Suitability

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