storage unit/route 14 drainage channel restoration project · project no: # date drwn chk'd...
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STORAGE UNIT/ROUTE 14
DRAINAGE CHANNEL RESTORATION PROJECT
COVER SHEET
VERMONTHARDWICK
5/1/2019
GMB
PCL
5/15/2019
18-072
STORAGE UNIT/ROUTE 14
DRAINAGE CHANNEL RESTORATION PROJECT
TOWN OF HARDWICK, VERMONT
PREPARED FOR:
CALEDONIA COUNTY NATURAL RESOURCES
CONSERVATION DISTRICT
PREPARED BY:
STONE ENVIRONMENTAL, INC.
DRAWING INDEX:
SHEET TITLE
1 COVER SHEET
2 GENERAL NOTES
3 EXISTING CONDITIONS PLAN
4 EROSION PREVENTION & SEDIMENT
CONTROL PLAN & DETAILS
5 PROPOSED CONDITIONS PLAN & PROFILE
6 CHANNEL SECTIONS
7 DETAILS
8 VEGETATION PLAN
Project Vicinity
Scale: 1" = 2000'
Project Location
Scale: 1" = 150'
100% DESIGN
ISSUED: OCTOBER, 2019
FOR PERMITTING PURPOSES ONLY
NOT FOR CONSTRUCTION
DRAWINGS ARE HALF SCALE WHEN PRINTED ON 11X17
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STORAGE UNIT/ROUTE 14
DRAINAGE CHANNEL RESTORATION PROJECT
GENERAL NOTES
VERMONTHARDWICK
5/1/2019
GMB
PCL
5/15/2019
18-072
FOR PERMITTING PURPOSES ONLY
NOT FOR CONSTRUCTION
General Notes:
1. Specifications for design, materials and construction shall meet or exceed the
following:
1.1. VTrans - Vermont Agency of Transportation "Standard Specifications for
Construction", 2018, with current standard plans and supplemental specifications.
1.2. This plan set and all conditions, specifications and supplements to standard
specifications contained within the contract documents.
2. Final resolution to conflicts within the specifications or any substitutions shall be
determined by the Engineer.
3. Utilities:
3.1. The Contractor shall be responsible for determining the location of all utilities prior
to any construction procedure. There are overhead power transmission lines and
other utilities in the immediate vicinity of the project. The Contractor is advised
that extreme caution will be required in the operation of equipment. Contact
DIG-SAFE at 1-888-DIG-SAFE.
3.2. Temporary relocation of utilities, if necessary, during construction is the
responsibility of the Contractor.
3.3. Damage to any utility by the Contractor shall be reported to the utility company.
Repair of the utility shall be paid for by the Contractor.
4. The Contractor shall not disturb any existing property corner, monument, survey
marker, or benchmark without first making provisions for its replacement or relocation.
General Construction Notes:
1. Note that permits have not yet been received for this project, and will be acquired prior
to construction by the Owner's representatives. Work can not proceed until permits are
acquired.
2. See Sheet 4 for notes on the construction sequence for erosion prevention and
sediment control.
3. All items shall be constructed to the dimensions shown on the drawings. Any changes
require approval by the Engineer.
4. The Engineer shall be notified prior to the start of construction.
5. It shall be the Contractor's responsibility to notify the Engineer immediately if problems
or unforeseen circumstances arise during construction.
6. All testing shall be ordered by the Engineer and coordinated by the Contractor in
accordance with VTrans and project specifications. Contractor shall give the Engineer
24 hours advance notice prior to placing materials requiring testing. Testing costs are
subsidiary and shall be included in the item unit price.
7. Determination of maximum densities for sand and gravels are the responsibility of the
Contractor. Proctor tests ordered by the Engineer shall be sampled and performed by
an independent testing laboratory and paid for by the Contractor. Include all costs in
the Item unit price.
8. Areas outside the limits of proposed work disturbed by the Contractor's operations
shall be restored by the Contractor to their original condition at the Contractor's
expense.
9. All soil moving equipment shall be thoroughly cleaned to make it free of soil, non-native
invasive species or other debris that could contain or hold seeds prior to being
delivered to the project site. Equipment shall be considered free of non-native or
invasive species and other such debris when a visual inspection by the Engineer,
completed prior to the equipment being moved to the site, does not disclose such
material present. A current list of non-native invasive species of concern is provided in
the contract documents.
10. Where relevant, topsoil shall be stripped and stockpiled to be used to restore disturbed
areas.
11. The color of stone used for channel restoration shall be either earth tones or medium to
dark gray and shall be approved by the Engineer prior to placement.
12. Suitable excavated material used for channel restoration shall consist of an inert
material that is hard, durable stone and coarse sand free from loam, clay, surface
coatings and deleterious materials, and shall meet the gradation requirements in the
notes titled "Channel Bed Construction Notes" on sheet 7 and must be approved by the
Engineer prior to placement.
13. The Contractor is responsible for providing any required traffic control including, but not
limited to, jersey barriers, or other barricades, signage and flaggers. All work shall be
performed from Bessette Storage property; work in along Route 14 or the within the
Route 14 shoulder is not permitted.
14. Contractor shall protect existing facilities and utility lines from all damage. Noted
and/or observable subsurface improvements such as utilities, water lines, and culverts
shall be avoided and repaired and/or replaced as needed. Repair of unforeseen
subsurface improvements will be negotiated.
15. Job-site safety conditions, including but not limited to, mobilization/demobilization,
excavation, stockpiling, material placement and culvert installation, shall be the
Contractor's responsibility.
16. Legally dispose of excess material off site.
17. Control dust with water as needed.
18. Basic construction standards for storage of materials, safety protection, protection of
neighboring properties, and reclamation of disturbed areas shall be followed. All
landscaping must be returned to the original condition or as modified per these plans.
19. Contractor shall construct appropriate fences and barriers around all construction sites,
storage sites, and excavations to safe guard the public from the construction site.
20. Details shown on any drawings are to be considered typical for all similar conditions,
unless otherwise noted.
Design Data:
1. Channel data used for 100% design (W.S. Elevations are from the project HEC-RAS
model at Station 2+25):
Storm Event Peak Flow (CFS) W.S. Elevation (feet)
2 Year 2.3 811.7
10 Year 25.3 812.4
50 Year 72.4 814.2
100 Year 98.1 814.6
2. Drainage area = 101 acres (0.16 mi
2
)
3. Channel bankfull width = ~6 feet
4. Channel bankfull depth = ~0.5-1 feet
5. Channel slope = 0.70%
Channel Reconstruction Notes:
1. Item 613.0001 - Channel Bed Material - Suitable excavated material used for
construction of stream bed shall meet the gradation requirements in the notes titled
"Channel Bed Construction Notes" on sheet 7 and must be approved by the Engineer
prior to placement. When suitable excavated material is not available for stream bed
construction the contractor shall source a material meeting the gradations in that table.
2. Item 613.0002 - Bank Rock - Suitable excavated material used for construction of
banks shall meet the gradation requirements in the notes titled "Channel Bed
Construction Notes" on sheet 7 and must be approved by the Engineer prior to
placement. When suitable excavated material is not available for bank construction the
contractor shall source a material meeting the gradations in that table. Bank rocks
shall be placed at the direction of the Engineer. Excavation required for placement of
bank rocks shall be paid for incidental to this item.
3. Item 613.0003 - Rock Steps - Suitable excavated material used for construction of
steps shall meet the gradation requirements in the notes titled "Channel Bed
Construction Notes" on sheet 7 and must be approved by the Engineer prior to
placement. When suitable excavated material is not available for step construction the
contractor shall source a material meeting the gradations in that table. Rock steps
shall be placed at the direction of the Engineer. Excavation required for placement of
rock steps shall be paid for incidental to this item.
4. Item 613.0004 - Boulder Clusters - Boulder clusters shall be placed at the direction of
the Engineer and shall be sized per the detail 'Typical Boulder Cluster' on Sheet 7.
5. Floodplain areas shall be constructed by removing and stockpiling topsoil, scarifying
native, inorganic soil, and then placing and compacting suitable excavated or imported
material in 8-inch lifts. See notes on Sheet 8 for additional details on floodplain
construction and seeding.
General Construction Notes (Continued):
21. Prior to beginning construction the following people shall be notified:
A. Dig-Safe
B. Caledonia County Natural Resources Conservation District
C. Site Owner
D. Project Engineer
E. Town of Hardwick
If work is delayed for a significant period, the same people shall be contacted again
prior to restart.
22. Investigate above surface site conditions prior to beginning work. Disturbed and
damaged property must be replaced and/or repaired to the satisfaction of the Owner,
Town and Engineer.
23. All excavation and backfilling shall be completed as soon as possible. Open
trenches shall be properly barricaded and warned for pedestrians and vehicles.
24. Granular backfill for structures shall consist of satisfactorily graded, free draining
granular material reasonably free from loam, silt, clay and organic material in
accordance with Section 704.08 of the VT Agency of Transportation Standard
Specifications for Construction.
Shop Drawing Approval Process:
1. The following process will be followed regarding the submission and approval of shop
drawings.
1.a. Contractor submits shop drawing to Engineer for review and comment.
1.b. Following review, the Engineer sends comments back to the Contractor.
1.c. Contractor submits revised shop drawings (if necessary) to Engineer; Engineer
ensures comments are incorporated into the revised shop drawings.
1.d. If comments are addressed appropriately, Engineer will provide shop drawing
approval stamp, distribute copies to applicable parties, and store approved
documents in project files.
1.e. If comments are not addressed, repeat steps 1a through 1c.
2. Engineer review and approval does not relieve the Contractor of full responsibility for
any negligence in the construction of the project resulting from shop drawings.
Engineer review and approval of shop drawings is not a warranty of the adequacy and
correctness of shop drawings; the Contractor is responsible for the correctness of shop
drawings and all associated calculations.
Pipe Work Notes:
1. The contractor shall make provisions for maintaining flow through existing force
mains, sewer lines, water lines, storm drains and channels which must be interrupted
during the work. Once work is complete, all flows shall be restored and temporary
flow diversions and associated piping shall be removed from the site.
2. The contractor is required to manage any groundwater encountered and maintain
stable slopes during excavation.
3. Existing water mains are under pressure. Contractor is advised to take precautions
while excavating around existing infrastructure. Temporary sheeting and/or bracing
may be required.
4. The contractor shall install mechanical plugs in the end of all pipe work at the
completion of each work day to seal it from water and soil.
DRAWINGS ARE HALF SCALE WHEN PRINTED ON 11X17
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STORAGE UNIT/ROUTE 14
DRAINAGE CHANNEL RESTORATION PROJECT
EXISTING CONDITIONS PLAN
VERMONTHARDWICK
5/1/2019
GMB
PCL
5/15/2019
18-072
Survey Notes:
1. Horizontal coordinates refer to Vermont State Plane, Feet.
2. Contour interval = 1 foot. The vertical datum refers to NAVD88. Contours were created
using two sources of data: 1) a topographic survey of the channel bed, banks,
floodplains and structural features collected by Stone Environmental (see Note 3
below), and 2) LiDAR data of all upland features, obtained from the Vermont Center for
Geographic Information.
3. Site survey was performed on November 15, 2018 by the following personnel:
Branden Martin, EI and Serena Matt of Stone Environmental, Inc. using a Geomax
Zoom 30 Total Station.
4. Survey data provided in these plans do not represent a boundary survey.
5. Utility locations shown on this plan should be considered approximate. Contractor is
required to verify utility locations prior to work.
6. River corridor extents, 100 year flood extents and VSWI wetlands obtained from VCGI.
FOR PERMITTING PURPOSES ONLY
NOT FOR CONSTRUCTION
Legend
Major Contour
Minor Contour
Vegetation Line
Edge of Pavement
Site Plan
Scale: 1" = 30'
Existing River Top of Bank
Point # Description Northing Easting Elevation
1 Rebar 3" From Grade 727902.9419' 1673786.0090' 811.50'
2 Building Corner 728026.1992' 1673761.7646' 816.60'
3 Manhole Rim 728318.7640' 1673875.3300' 817.18'
Point Table
Survey Control Point
ft
m
0
0
1 inch = feet
( 1 : )
DRAWINGS ARE HALF SCALE WHEN PRINTED ON 11x17
6 15 30
30 30 60 120
30
360
Existing Drainage Channel
Top of Bank
VTrans Right-of-Way Boundary
Existing Vegetation
Existing Sanitary Manhole
Existing Catch Basin
Existing Storm Drain
Parcel Boundaries
09029-00070
(Parcel #28208910119)
BETTY BENWAY
15 Benway Dr.
Hardwick, VT, 05843
23089-00000
(Parcel #28208911378)
ELLEN PLATKA
PO Box 98
East Hardwick, VT, 05836
09029-00060
(Parcel #28208910562)
STEVEN FERLAND
57 South Main St.
Hardwick, VT, 05843
09028-00000
(Parcel #28208910416)
ROBERT DRAGON
65 VT RT 14 S
Hardwick, VT, 05843
09029-00050
(Parcel #28208911580)
WINSTON JENNISON INVESTMENT LLC
1754 Plot Rd 1
Johnson, VT, 05656
09026-00040
(Parcel #28208910421)
WILLIAM DRISCOLL
36 Nanel Dr.
Glastonberry, CT 06033
09026-00020
(Parcel #28208910136)
17 ROUTE 14 SOUTH LLC
PO Box 1250
Hardwick, VT, 05843
VTANR River Corridor Extents
FEMA 100 Year Flood Extents
Base Flood Elev. = 816'
VSWI Wetlands
Trace of 816' Elevation
Existing Overhead Utility
Existing Utility Pole
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5
8
1
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STORAGE UNIT/ROUTE 14
DRAINAGE CHANNEL RESTORATION PROJECT
EROSION PREV. & SEDIMENT CONTROL PLAN & DETAILS
VERMONTHARDWICK
5/1/2019
GMB
PCL
5/15/2019
18-072
FOR PERMITTING PURPOSES ONLY
NOT FOR CONSTRUCTION
Legend
Major Contour
Minor Contour
Vegetation Line
Edge of Pavement
Site Plan
Scale: 1" = 30'
Existing River Top of Bank
Survey Control Point
ft
m
0
0
1 inch = feet
( 1 : )
DRAWINGS ARE HALF SCALE WHEN PRINTED ON 11x17
6 15 30
30 30 60 120
30
360
Existing Drainage Channel
Top of Bank
VTrans Right-of-Way Boundary
Existing Vegetation
Existing Sanitary Manhole
Existing Utility Pole
Existing Storm Drain
Parcel Boundaries
Temporary Cofferdam - Sand Bag Option
NTS
Sedimentation Basin Detail
NTS
Silt Fence
NTS
Proposed Site Access Route
Temporary Material Storage
Proposed Silt Fence
General Construction and Wetland Restoration Sequence:
1. This recommended construction sequence is for the construction of a forebay;
restoration of the drainage channel including construction of the stream channel, its
banks and floodplains; and replacement of the culvert discharging to Cooper Brook.
This construction sequence assumes that work will progress from upstream to
downstream, during summer low-flow conditions. Alternate construction sequences
recommended by the Contractor may be submitted for consideration by the Engineer.
Construction Sequence:
The VT DEC requires that the following steps be taken in order to minimize the erosion of
soil and transport of sediment within the limits of work during construction. These
measures are integral to the successful restoration of the project site.
1. Install erosion and sediment control measures prior to any earth moving activity that
will influence or affect stormwater runoff.
2. Clear areas only as needed to meet the requirements of the specific
restoration/construction task to be completed.
3. Implement Water Control Plan measures:
3.1. Install temporary sandbags in manhole over inlet pipe at storage facility entrance,
or at upstream pipe inlet. Install pump at sandbag location and connect to bypass
flow pipe, and route pipe to Cooper Brook as shown on this sheet. Bury pipe where
needed (at minimum in road at storage facility entrance) to protect pipe and ensure
positive slope along the conveyance.
3.2. Mobilize equipment and construct forebay, channel, floodplains and replace culvert
in dry conditions per Sheets 5, 6 and 7. Utilize dewatering sump when and where
needed, to maintain dry conditions. Place discharge end of dewatering pipe at
minimum 20' from edge of wetland or brook. If infeasible, direct dewater flows to
sedimentation basin. See details this sheet regarding sedimentation basin.
3.3. Once all earth moving activity is complete, remove the sandbags and bypass flow
pipe, and sedimentation basin if applicable.
4. Restore temporarily impacted areas. In wetland areas to be restored, regrade area to
original surface or as shown on plan and scarify surface to prepare for loam, seed,
erosion control fabric and plantings.
5. Place loam, seed and fabric along disturbed upland areas, along with plantings. See
Sheet 8 for details.
6. Once all contributing upslope areas have been permanently stabilized and vegetated,
remove trapped sediment from behind all silt fence and other temporary sediment
control devices. Remove all temporary sediment control devices.
7. Ultimately, the construction sequence details are to be determined by the Contractor
and must be approved by the Engineer prior to beginning work.
Water Control Plan Notes
1. The suggested Water Control Plan in sequencing notes above (Steps 3.1 through 3.3)
is an example and for the purposes of project bidding.
2. The Contractor shall submit a Water Control Plan (Plan) for approval by the Engineer
prior to mobilization. The plan can follow Steps 3.1 through 3.3, or the Contractor may
submit an alternate Plan. Overall, the Plan will be the Contractor's plan that meets all
permit requirements and is subject to approval by the Engineer. See specifications.
3. All permits relevant to the Plan are/will be located in the construction documents.
4. The contractor will monitor the weather, rainfall and storm warnings issued by the
National Weather Service throughout the project and will remove all equipment and
materials that may be affected by flood flows that are conveyed to the drainage
channel, and flows from Cooper Brook.
Summary of Impacts
Limits of Permanent Impact
(11,772 Total SF)
Temporary Impacts
(2,600 Total SF)
Proposed Channel
Proposed Floodplain Benches
Proposed Sloped Bank
INSTALL SANDBAG
COFFERDAM IN 1)
MANHOLE OR 2)
UPSTREAM INLET,
TO PREVENT
FLOW INTO
CHANNEL
DEWATERING SUMP
(VERTICAL PERFORATED PIPE W/PUMP)
IN GRAVEL BED, PLACED WHEN/WHERE
NEEDED TO MAINTAIN DRY CONDITIONS
DISCHARGE POINT IN UPLANDS, SET
BACK MIN. 50' FROM WETLANDS OR
STREAM LIMITS AND FILTERED VIA
NATURAL VEGETATION, OR WITH
SEDIMENTATION BASIN, SEE DETAIL
THIS SHEET
530 LF PIPE OR HOSE CONVEYING
PUMPED BYPASS FLOWS TO
COOPER BROOK
BURY PIPE IN EXCAVATED
TRENCH IN ROAD TO PROTECT
PIPE DURING OPERATIONS
MAINTAIN POSITIVE SLOPE
BYPASS FLOW
DISCHARGE POINT TO
COOPER BROOK
PROPOSED FOREBAY (70 LF)
AND ROCK STEP
SEE DETAILS SHEET 7
TEMPORARY STORAGE
AREA (2,600 SF)
VTANR River Corridor Extents
FEMA 100 Year Flood Extents
(Base Flood Elev. = 816')
VSWI Wetlands
Trace of 816' Elevation
Limits of Disturbance
PROPOSED CHANNEL AND
FLOODPLAIN BENCHES (TYP.)
338 LF TOTAL, FROM FOREBAY
DISCHARGE TO CULVERT INLET
T
E
M
P
O
R
A
R
Y
S
T
O
R
A
G
E
A
R
E
A
(2
,3
0
0
S
F
)
E
Q
U
IP
M
E
N
T
S
T
O
R
A
G
E
A
R
E
A
(3
,1
0
0
S
F
)
Existing Overhead Utility
Existing Catch Basin
PROPOSED 5' X 3.2'
ELLIPTICAL CONCRETE
PIPE, 30 LF
8
1
4
8
1
3
815
8
1
5
8
1
4
~1.5' DEEP
POOL
STONE WEIR
ELEV. 814.30'
SEE DETAIL SHEET 7
FINISHED GRADE AT
CHANNEL THALWEG
S=0.70%
PROPOSED
70 LF FOREBAY
S=0.00%
SEE DETAIL SHEET 7
EXISTING CULVERT TO
BE REPLACED WITH
5' WIDE X 3.2' HIGH X 30'
LONG ELLIPTICAL
CONCRETE PIPE
INV. IN = 810.35'
INV. OUT = 810.05'
ELEVATIONS AT
START/END OF
FOREBAY = 812.55
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STORAGE UNIT/ROUTE 14
DRAINAGE CHANNEL RESTORATION PROJECT
PROPOSED CONDITIONS PLAN & PROFILE
VERMONTHARDWICK
5/1/2019
GMB
PCL
5/15/2019
18-072
FOR PERMITTING PURPOSES ONLY
NOT FOR CONSTRUCTION
Site Plan
Scale: 1" = 20'
ft
m
0
0
1 inch = feet
( 1 : )
DRAWINGS ARE HALF SCALE WHEN PRINTED ON 11x17
4 10 20
20 20 40 80
20
240
PROPOSED FOREBAY (70 LF)
AND ROCK STEP
SEE DETAILS SHEET 7
PROPOSED 5' X 3.2'
ELLIPTICAL CONCRETE
PIPE, 30 LF
PROPOSED CHANNEL AND
FLOODPLAIN BENCHES (TYP.)
338 LF TOTAL, FROM FOREBAY
DISCHARGE TO CULVERT INLET
Existing and Proposed Longitudinal Profile
Horizontal Scale: 1" = 20'
Vertical Scale: 1" = 2'
Existing Channel Thalweg
Legend
Proposed Channel Thalweg
Legend
Major Contour
Minor Contour
Vegetation Line
Edge of Pavement
Existing River Top of Bank
Survey Control Point
Existing Drainage Channel
Top of Bank
VTrans Right-of-Way Boundary
Existing Vegetation
Existing Sanitary Manhole
Existing Storm Drain
Parcel Boundaries
Proposed Channel
Proposed Floodplain Benches
Proposed Sloped Bank
Limits of Disturbance
Existing Overhead Utility
Existing Catch Basin
Existing Utility Pole
CHANNEL + FLOODPLAIN BENCHES = 14'
BANKFULL WIDTH = 6'
BOTTOM WIDTH ~4.7'
S=2:1 NEAR
RT. 14
TIE-IN TO
EXISTING
GRADE
1
HIGH FLOW
LOW FLOW
5% (T
YP
.)
1
1
1
5% (TY
P.)
S=3:1 NEAR BESSETTE
STORAGE TIE-IN TO
EXISTING GRADE
~0.5-1'
FINAL THALWEG AND TOP
OF BANK ELEVATIONS
SEE TABLE THIS SHEET
PLACE BANK MATERIALS (TYP.)
(WOOD OR STONE)
IMBED 5-6" IN BED MATERIAL
PLACE 6" CHANNEL BED
MATERIAL, SEE TABLE
SHEET 7 FOR GRADATION
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STORAGE UNIT/ROUTE 14
DRAINAGE CHANNEL RESTORATION PROJECT
CHANNEL SECTIONS
VERMONTHARDWICK
5/1/2019
GMB
PCL
5/15/2019
18-072
BEGIN ROUTE 14
EDGE OF ROAD
(STATION 14.2)
~14' (TYP.)
ROUTE 14
ROUTE 14
ROUTE 14
ROUTE 14
ROUTE 14
ROUTE 14
ROUTE 14
BEGIN ROUTE 14
EDGE OF ROAD
(STATION 17.5)
BEGIN ROUTE 14
EDGE OF ROAD
(STATION 19.5)
BEGIN ROUTE 14
EDGE OF ROAD
(STATION 14.7)
BEGIN ROUTE 14
EDGE OF ROAD
(STATION 21.0)
BEGIN ROUTE 14
EDGE OF ROAD
(STATION 14.5)
BEGIN ROUTE 14
EDGE OF ROAD
(STATION 13.6)
3:1
2:1
3:1
2:1
3:1
2:1
3:1
2:1
3:1
2:1
PROPOSED 5' WIDE X 3.2' HIGH
CONCRETE ELLIPTICAL PIPE
INSTALL 6-12" CRUSHED STONE FOR
PIPE FOUNDATION, ITEM 156.1
PROPOSED GRADING
OVER PIPE (MAINTAIN
1' COVER OVER PIPE)
Station Thalweg Top Bank
0+75 807.65 -
1+50 810.70 811.60
2+25 811.30 812.20
3+00 811.80 812.70
3+75 812.30 813.20
4+50 811.00 813.40
Final Elevations Table
Existing Grade
Final Grade
Channel Section Notes:
1. Orientation of sections is looking downstream; river left (adjacent to the highway) is
represented by positive station numbers, river right is represented by negative station
numbers.
Legend
RESTORED CHANNEL (TYP.)FLOODPLAIN BENCH (TYP.)
SEE DETAIL SHEET 7
REGARDING CONSTRUCTION
OF FOREBAY AND BANKS
ft
m
0
0
1 inch = feet
( 1 : )
DRAWINGS ARE HALF SCALE WHEN PRINTED ON 11x17
1 2.5 5
5 5 10 20
5
60
Typical Channel Cross Section
Scale: 1" = 2'
FOR PERMITTING PURPOSES ONLY
NOT FOR CONSTRUCTION
Typical Channel Cross Section Notes:
1. See planting plan on Sheet 8 for details regarding vegetation species and coverage.
2. Approximately 50% of channel banks to be constructed using wood logs and 50% of
channel banks to be constructed using stone. See table on Sheet 7 for sizing of log
and stone bank material.
1
1
1
1
5% (T
YP
.)
EXCAVATE BANKS TO CREATE
FOREBAY WALLS
PLACE FABRIC FOLLOWED BY
COBBLE AND SMALL BOULDERS,
THEN LARGE BOULDERS
SEE TABLE THIS SHEET FOR
GRADATIONS
DEPTHS VARY
SEE TABLE
THIS SHEET
FINAL THALWEG AND TOP
OF BANK ELEVATIONS
SEE TABLE THIS SHEET
IMBED BOTTOM
BOULDERS 9-12" BELOW
BOTTOM ELEVATION OF
FOREBAY
CHANNEL + FLOODPLAIN BENCHES = 14'
BANKFULL WIDTH = 6'
BOTTOM
WIDTH
~2.0'
S=2:1 NEAR
RT. 14
TIE-IN TO
EXISTING
GRADE
S=3:1 NEAR BESSETTE
STORAGE TIE-IN TO
EXISTING GRADE
INSTALL 6" GRANITE SLAB
SECTIONS ALONG
BOTTOM OF FOREBAY
(TYP.)
TO SERVE AS GUIDE FOR
SEDIMENT EXCAVATION
DRAWN ON:
DRAWN BY:
CHECKED BY:
CHECKED ON:
DRAW
IN
G CRED
ITS
REVISIO
NS
PROJECT NO:
# DATE DRWN CHK'D APP'D DESCRIPTION
DRAW
IN
G SCALE
FILE:
FIG
URE N
O.
7
STORAGE UNIT/ROUTE 14
DRAINAGE CHANNEL RESTORATION PROJECT
DETAILS
VERMONTHARDWICK
5/1/2019
GMB
PCL
5/15/2019
18-072
FOR PERMITTING PURPOSES ONLY
NOT FOR CONSTRUCTION
Forebay - Typical Section
Scale:
1
4
" = 1'-0"
Channel Bed Construction Notes:
1. Fill placed to establish finished streambed grades shall be a mixture of sand, gravels,
cobbles and large cobbles similar to natural streambed gradations in adjacent streams,
as follows:
Stone Size (inches) % Finer Then Size Range
6" 100 4"-6"
4" 95 3"-4"
3" 84 2"-3"
2" 50 1"-2"
1" 30 <3/4"-1"
<3/4" 15 Sand-3/4"
2. 3/4" minus class shall be well graded with approximately 5% of the total bed mix as
sand.
3. Fill placed to construct steps, pools and banks (forebay and stream channel) shall be
small to medium sized boulders ranging from 16" - 20" in diameter along the
intermediate axis.
4. Fill placed to construct roughness features (boulder clusters) shall be small to medium
sized boulders ranging from 12" - 16" in diameter along the intermediate axis.
5. All fill placed within the channel limits shall be sub-rounded, rounded or well-rounded
river stone.
Rock Step at Forebay Discharge - Typical Section
Scale:
1
4
" = 1'-0"
Rock Step at Forebay Discharge - Plan View
Scale: NTS
Typical Boulder Cluster
Scale:
1
4
" = 1'-0"
Station Thalweg Top Bank Notes
4+70 812.55 813.45 Begin Forebay
4+50 811.00 813.40 Forebay Max Pool
4+00 812.55 813.30 End Forebay
Final Elevations Table - Forebay
DRAWINGS ARE HALF SCALE WHEN PRINTED ON 11X17
4" FOR 12"-24" PIPE
6" FOR 30"-60" PIPE
6"
GRANULAR BACKFILL FOR STRUCTURES
VTRANS ITEM 704.08
SUITABLE
FOUNDATION
SUITABLE BACKFILL TO BE
COMPACTED IN 9" LIFTS TO A
DENSITY OF 95% OF THE MAXIMUM
DRY DENSITY USING STANDARD
PROCTOR TEST, METHOD A,
ACCORDING TO ASTM D698
MIN. TRENCH WIDTH
(6" OUTSIDE PIPE WIDTH)
GRANULAR BACKFILL FOR STRUCTURES
VTRANS ITEM 704.08
Typical Pipe Trench Detail
NTS
8
1
4
8
1
3
815
12"
12" MIN.
12" MIN.
DRAWN ON:
DRAWN BY:
CHECKED BY:
CHECKED ON:
DRAW
IN
G CRED
ITS
REVISIO
NS
PROJECT NO:
# DATE DRWN CHK'D APP'D DESCRIPTION
DRAW
IN
G SCALE
FILE:
FIG
URE N
O.
8
STORAGE UNIT/ROUTE 14
DRAINAGE CHANNEL RESTORATION PROJECT
VEGETATION PLAN
VERMONTHARDWICK
5/1/2019
GMB
PCL
5/15/2019
18-072
FOR PERMITTING PURPOSES ONLY
NOT FOR CONSTRUCTION
Vegetation Plan
Scale: 1" = 10'
ft
m
0
0
1 inch = feet
( 1 : )
DRAWINGS ARE HALF SCALE WHEN PRINTED ON 11x17
2 5 10
10 10 20 40
10
120
PROPOSED FOREBAY AND
STONE WEIR
PROPOSED CHANNEL
AND FLOODPLAIN
BENCHES (TYP.)
Vegetation Plan Notes:
1. Contractor to install loam, seed and erosion control fabric along floodplains, sloped
banks and other disturbed areas according to details on this sheet and standard
VTrans practices.
2. Seed mix shall be New England Wetmix by New England Wetland Plants, Inc. or
equivalent, applied at an application rate of 18 lbs/acre or per seed manufacturer's
requirements.
3. Plants shall be placed in ~10' grid spacing throughout Planting Zones 1 and 2, and as
directed by the Engineer.
Legend
Major Contour
Minor Contour
Edge of Pavement
Existing Drainage Channel
Top of Bank
Existing Vegetation
Existing Utility Pole
Parcel Boundaries
Proposed Channel
Proposed Floodplain Benches
Proposed Sloped Bank
Scientific Name Common Name Type Total Plants
Asclepias incarnata Swamp milkweed Herb 25
Caltha palustris Marsh marigold Herb 25
Iris versicolor Blue flag iris Herb 25
Schoenoplectus pungens Three-square bulrush Herb 25
Verbena hastata Blue vervain Herb 25
Aster puniceus Swamp aster Herb 25
Matteuccia streuthiopteris Ostrich fern Fern 25
Spiraea latifolia Meadowsweet Shrub 20
Spiraea tomentosa Steeplebush Shrub 20
Planting Table
PLANTING ZONE 1 (TYP.)
FLOODPLAINS
2,412 SF Total
PLANTING ZONE 2 (TYP.)
SLOPES
2,382 SF Total
Erosion Control Fabric
NTS
Existing Overhead Utility
PROPOSED 5' WIDE X 3.2' HIGH
CONCRETE ELLIPTICAL PIPE
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