sterling pond and josh ames structure ... pond and josh ames structure ecological restoration...

STERLING POND AND JOSH AMES STRUCTUREECOLOGICAL RESTORATION PROJECT

VICINITY MAP SHEET INDEX

01 COVER SHEET02 GENERAL NOTES03 SHEET INDEX04 GRADING PLAN -0105 GRADING PLAN-0206 GRADING PLAN-0307 HECRAS CROSS SECTIONS-0108 HECRAS CROSS SECTIONS-0209 HECRAS CROSS SECTIONS-0310 HECRAS CROSS SECTIONS-0411 HECRAS CROSS SECTIONS-0512 CHANNEL PLAN13 CHANNEL PROFILE14 CHANNEL DETAIL15 PLANTING PLAN-0116 PLANTING PLAN-0217 PLANTING PLAN-0318 PLANTING SECTION19 PLANTING DETAILS20 PLANTING SCHEDULES21 STORMWATER MANAGEMENT

PROJECT AREA

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ISSUES / REVISIONSDATE

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Reuse of Documents:This document and the ideas and designs incorporated herein, as aninstrument of Professional Service, is the property of Biohabitats, Inc.and is not to be used in whole or in part, for any other project withoutthe written authorization of Biohabitats, Inc.

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DRAFT DESIGN/BUILD PLANNOT FOR CONSTRUCTION

MAY 2013

DRAFT DESIGN/BUILD PLAN FORFLOOD PLAIN SUBMITTALNOT FOR CONSTRUCTION

JUN 2013

DRAFT DESIGN/BUILD PLAN FORPRECONSTRUCTION MEETING

AUG 2013

GENERAL NOTES

UTILITY NOTES:1. THE UNDERGROUND AND OVERHEAD UTILITIES SHOWN ON THIS MAP HAVE BEEN DETERMINED BY STANDARD SURVEY PRACTICE, FIELD RECONNAISSANCE, AND AVAILABLE RECORD INFORMATION. NEITHER THE EXACT LOCATION NOR THE INFORMATION OF THESE EXISTING UTILITIES IS GUARANTEED TO BE COMPLETE OR CORRECT.

TOPOGRAPHIC NOTES:1. ALL ELEVATIONS SHOWN REFER TO THE NATIONAL GEODETIC VERTICAL DATUM OF 1929 (NGVD29).2. HORIZONTAL COORDINATES REFER TO THE COLORADO STATE PLANE NORTH COORDINATE SYSTEM.3. UNITS ARE IN FEET, UNLESS OTHERWISE NOTED.4. AERIAL PHOTOGRAPHY WAS FLOWN BY AERIALS EXPRESS IN SEPTEMBER THROUGH OCTOBER 2009.

SEQUENCE OF CONSTRUCTION

1. STAKE GRADES, AS NEEDED.2. INSTALL APPLICABLE CONSTRUCTION BMPS AND WATER CONTROL, AS APPROPRIATE,

ALONG WITH ORANGE BLAZE FENCE TO HELP KEEP OUT PUBLIC ACCESS DURINGCONSTRUCTION.

3. EXCAVATE THE BERM BETWEEN THE PRIMARY POND AND RIVER TO ELEVATIONS ASSHOWN ON PLANS AND AS DIRECTED IN FIELD.

4. PLACE EXCAVATED MATERIAL IN THE PRIMARY POND TO ELEVATIONS SHOWN ONPLANS. FIRST CREATE COTTONWOOD FOREST ZONE IN THE POND, WHICH CAN THENBE USED FOR EQUIPMENT ACCESS.

5. PROCEED EXCAVATING BERM AND FILLING POND, MOVING IN AN UPSTREAMDIRECTION.

6. AFTER COMPLETION OF EXCAVATION UPSTREAM, RETURN TO LOCATION OF INITIALEXCAVATION AND CONTINUE IN DOWNSTREAM DIRECTION.

7. FILL BOTH PRIMARY AND SECONDARY PONDS AS SHOWN ON PLANS OR DIRECTED INFIELD.

8. AT THE LOCATION OF THE 24” ELCO WATERLINE, LOCATE CONCRETE CUTOFF WALLAND WATERLINE. CONTINUE EXCAVATION TO DOWNSTREAM LIMIT OF PROJECT.

9. BEFORE GRADING IN CHANNEL, LOCATE 24” ELCO WATERLINE IN POUDRE RIVER.10. WHILE STRUCTURE DEMOLITION OCCURS BY SEPARATE CONTRACTOR, GRADE RIFFLE

AND POOL SEQUENCE, STARTING AT UPSTREAM LIMIT.11. INSTALL RIFFLE GRADE CONTROL AND TOE PROTECTION AS SHOWN ON PLANS OR

DIRECTED IN FIELD.12. CONSTRUCT BENCHES AND, AT KEY LOCATIONS, VEGETATE WITH TRANSPLANTED

WILLOWS.13. AT COMPLETION OF STRUCTURE DEMOLITION, COMPLETE CHANNEL GRADING AND TIE

INTO UPSTREAM END OF RIFFLE APPROXIMATELY 100' DOWNSTREAM OF EXISTINGDAM.

14. USE ANY EXCESS CHANNEL MATERIAL AS FILL IN PRIMARY AND SECONDARY PONDS.15. AT COMPLETION OF ROUGH GRADING, SURVEY CROSS SECTIONS AND CHECK

RESULTS IN FLOODPLAIN MODEL. IF NECESSARY, MAKE GRADING ADJUSTMENTS.16. HYDROMULCH ALL DISTURBED SOIL. INCLUDE SEED FOR TEMPORARY GROUND COVER

IN THE HYDROMULCH.17. IN THE SPRING, RIP COMPACTED AREAS, PLACE AND SPREAD TOPSOIL/COMPOST MIX.18. INSTALL PERMANENT SEED (NATURAL AREAS RESPONSIBILITY)19. INSTALL VEGETATION IN ALL ZONES.

POND WATER CUT/FILL IMPACT AREAS TABLE

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GENERAL NOTES

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SHEET INDEX

100 2000

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1" = 100'

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GRADINGPLAN-01

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40 800

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GRADINGPLAN-02

05

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GRADINGPLAN-03

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FINAL DESIGN/BUILD PLANOCT 2013

HECRAS CROSSSECTIONS-01

07

40 800

HORIZONTAL SCALE

4

8

0

VERTICAL

SCALE

AS SHOWN

NOTES:1. CROSS SECTION NUMBERING SYSTEM BASED ON

HECRAS STATIONS2. ADDITIONAL GRID LINES REFLECT STATIONS FOR

ALIGNMENT TURNING POINTS

KEY MAP NTS

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08

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4

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SCALE


AS SHOWN




KEY MAP NTS

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09

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4

8

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VERTICAL

SCALE


AS SHOWNNOTES:1. CROSS SECTION NUMBERING SYSTEM BASED ON

HECRAS STATIONS2. EXISTING ELEVATIONS IN POND ARE ALL BELOW

INEFFECTIVE FLOW ELEVATION AND ARE NOT SHOWNIN CROSS SECTION.

3. ADDITIONAL GRID LINES REFLECT STATIONS FORALIGNMENT TURNING POINTS

KEY MAP NTS

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AS SHOWN

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HECRAS STATIONS2. EXISTING ELEVATIONS IN POND ARE ALL BELOW

INEFFECTIVE FLOW ELEVATION AND ARE NOT SHOWNIN CROSS SECTION.

3. ADDITIONAL GRID LINES REFLECT STATIONS FORALIGNMENT TURNING POINTS

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AS SHOWN

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4

8

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CHANNEL PLAN

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PROPOSED CHANNEL: UPSTREAM VIEW

PROPOSED CHANNEL: DOWNSTREAM VIEW

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AS SHOWN

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CHANNELPROFILE

NOTE:1. EXISTING GROUND REFERENCED IN PROFILE

OBTAINED FROM HECRAS CROSS SECTIONS.

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CONSTRUCTED RIFFLENOT TO SCALETYPICAL SECTION

1.5'

1.25'

4.0'3.0'THALWEG

TRANSPLANTED WILLOWS

TYPE H RIPRAP EXISTING COBBLE SUBSTRATE

GRADE AND PLANT TOP OFBANK ACCORDING TO PLANS

EXISTING GROUND

COIR FIBER MATTING

TRANSPLANTED WILLOW BENCH WIDTH VARIES-SEE GRADING PLAN

EXPOSED COBBLE

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CHANNEL DETAIL

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PLANTINGPLAN-01

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PLANTINGPLAN-02

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PLANTINGPLAN-03

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PLANTINGSECTION

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SECTION B

SECTION A

10 200

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*IMS*

*OMS*

NOT TO SCALEPLANT SPACING - RANDOMPLAN VIEW

OMS- AN OVERALL MINIMUM SPACING DISTANCE *OMS* IS ASSIGNED TO THE PLANTING CONFIGURATION *SEE PLANT SCHEDULE*IMS- AN INDIVIDUAL MINIMUM SPACING DISTANCES *IMS* IS ASSIGNED TO EACH INDIVIDUAL SPECIES *SEE PLANT SCHEDULE*

NOT TO SCALE

TREE PLANTING - CONTAINER GROWN

BACKFILL WITH SOIL ORPLANTING MIX AS SPECIFIEDTAMP TO FILL ALL VOIDS ANDAIR POCKETS

PRUNE TREE OF ALL MAJORDEADWOOD CRISS-CROSSINGBRANCHES, AND ANY EXCESSIVEAND/OR SUCKER GROWTH

NOT TO SCALE

SHRUB PLANTING - CONTAINER GROWN

NOT TO SCALE

NEVER CUT LEADER

TREE PLANTING - BALLED AND BURLAPPED

2"x2"x8' HARDWOOD STAKES.NOTE: TREES LESS THAN1 INCH CALIPER DO NOT

REQUIRE STAKING

GUY WIRES WITHTURNBUCKLES

CUT AND REMOVE BURLAPFROM TOP 1/3 OF TREE BALL

3"-4" MULCH SAUCER AROUND TREE

BACKFILL WITH SOIL OR PLANTINGMIX AS SPECIFIED. TAMP TO FILL

ALL VOIDS AND AIR POCKETS

PRUNE TREE OF ALL MAJORDEADWOOD CRISS-CROSSINGBRANCHES, AND ANY EXCESSIVEAND/OR SUCKER GROWTH

REMOVE OR BEND BACKTOP OF NON BIOGRADEABLEWIRE BASKET

GROUND LINE TO BETHE SAME AS NURSERY

UPRIGHT STAKES EXTENDEDTO FIRM BEARING 18" MIN.

EXCAVATE HOLE 1-1/2 TIMES THEWIDTH AND DEPTH OF THE ROOT MASS.REMOVE ALL NON-ORGANIC MATERIAL

NOTE: EACH SYMBOL INDICATES A DIFFERENT SPECIES

NOT TO SCALE

BACKFILL WITH SOILOR PLANTING MIX ASSPECIFIED. TAMP TOFILL ALL VOIDS ANDAIR POCKETS

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PLANTINGDETAILS

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NOTE: UPLAND PLANTING ZONE EQUALS 1.32 ACRES. IT WILL CONSIST OF SEED AND WILL BE COMPLETED BY NATURAL AREAS STAFF.

NOTES:Mix based on 90 Seeds/ft2 (70 grasses, 20 broadleaf)Use zone size in applicable Plant Composition Schedule to calculate total quantity of seed.Pounds per acre are in PLS (Pure Live Seed) and must be ordered that way.This mix is based on the contractor using a drill seed application. Mix should be doubled if hand broadcasted.All materials furnished shall be free of Colorado State noxious weeds as defined in Article III, Section 21-40 of the Code of the City of Fort Collins.Natural Areas Staff is responsible for all seeding.

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PLANTINGSCHEDULES

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STORMWATER MANAGEMENT PLANCITY OF FORT COLLINS STERLING POND/JOSH AMES RESTORATION PROJECT

THE CITY OF FORT COLLINS STERLING POND/JOSH AMES RESTORATION PROJECT CREATES 11.5 ACRES OF RIPARIAN AND WETLAND HABITAT ANDPROVIDES MORE FREQUENT HYDROLOGIC CONNECTIVITY WITH THE ADJACENT POUDRE RIVER. THE PROJECT EXCAVATES THE EXISTING BERMBETWEEN STERLING POND, AN ABANDONED GRAVEL MINING PIT, AND THE POUDRE RIVER AND FILLS IN PART OF THE POND TO CREATE WETLAND. INADDITION, THE PROJECT IMPROVES WATER CONVEYANCE AND AQUATIC HABITAT CONNECTIVITY BY REMOVING THE EXISTING ABANDONED JOSH AMESDIVERSION STRUCTURE. IN PLACE OF THE STRUCTURE, WHICH CONSISTS OF A CONCRETE DAM ACROSS THE RIVER AND HIGH WALL ON THE NORTHBANK, THE PROJECT CREATES A RIFFLE/POOL SEQUENCE IN THE RIVER. ALL DISTURBED AREAS WILL BE VEGETATED WITH APPROPRIATE PLANTCOMMUNITIES AS SHOWN ON THE RESTORATION PLAN.

THE CONSTRUCTION SEQUENCE IS PROVIDED ON SHEET 2 OF THE RESTORATION PLANS.

CONSTRUCTION ACTIVITIES WILL BE CARRIED OUT TO MINIMIZE DISTURBANCE TO THE EXTENT POSSIBLE. STERLING POND AND THE POUDRE RIVERARE THE RECEIVING WATERS.

THE MAIN TYPE OF ACTIVITY THAT MAY IMPACT STORMWATER IS SOIL DISTURBANCE AND EXCAVATION IN THE RIVER. MOST OF THE DISTURBEDSLOPES WILL BE RELATIVELY FLAT, AND NONE EXCEED 3:1 HORIZONTAL:VERTICAL. MOST SEDIMENT FROM SOIL DISTURBANCE WILL BE HELD ON SITE INSTERLING POND. TO MINIMIZE SEDIMENT IN THE POUDRE RIVER, CHANNEL EXCAVATION WILL OCCUR DURING THE SCHEDULED DIVERSION OF LARIMERAND WELD IRRIGATION CANAL, WHICH WILL DIVERT MOST OF THE FLOW OF THE RIVER DURING NOVEMBER. OTHER POTENTIAL IMPACTS TOSTORMWATER MAY INCLUDE FUELING AND MATERIAL DELIVERY AND STORAGE.

DISTURBANCE ACTIVITIES AND CORRESPONDING BEST MANAGEMENT PRACTICES:

1. EARTHWORK - AREAS DISTURBED BY GRADING WILL BE HYDROMULCHED AND TEMPORARILY SEEDED AFTER COMPLETION OF GRADING.PERMANENT REVEGETATION, BOTH LIVE PLANTING AND SEEDING, WILL OCCUR IN SPRING 2014.

2. PRE-DISTURBANCE VEGETATION SHALL BE PROTECTED AND RETAINED WHEREVER POSSIBLE. REMOVAL OR DISTURBANCE OF EXISTINGVEGETATION SHALL BE LIMITED TO THE AREA REQUIRED FOR IMMEDIATE CONSTRUCTION OPERATIONS AND FOR THE SHORTEST PRACTICALPERIOD OF TIME.

3. FUELING - ABSORBANT WILL BE AVAILABLE ON SITE IN CASE OF ANY SPILLS DURING FUELING. USED ABSORBANT WILL BE DISPOSED OF IN ANAPPRORIATE MANNER.

4. MATERIAL STORAGE - SOIL STOCKPILES WILL BE LOCATED IN AREAS OUTSIDE OF DRAINAGE PATHWAYS TO STERLING POND OR THE POUDRERIVER.

5. MATERIAL DELIVERY AND EQUIPMENT OPERATION - ACCESS TO THE SITE WILL OCCUR AT EXISTING STABILIZED ACCESS POINTS OFF OF SHIELDSSTREET. ANY DISTURBED AREAS WILL BE SMOOTHED AND SEEDED AT THE END OF GRADING ACTIVITY. ANY EXCESS MATERIALS, GARBAGE, ANDDEBRIS FROM CONSTRUCTION ACTIVITIES WILL BE REMOVED FROM THE SITE AND APPROPRIATELY DISPOSED.

6. FINAL STABILIZATION WILL BE ACHIEVED THROUGH ESTABLISHMENT OF VEGETATION. REFER TO RESTORATION PLAN AND PLANTING SCHEDULESFOR DETAILED INFORMATION ON LONG-TERM PERMANENT VEGETATION.

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STORMWATERMANAGEMENT

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