20230766 Ver 1_CheekCrk_2023_Specifications_20230526

Cheek Creek Stream Rehabilitation Project - Specifications
STREAM RESTORATION SPECIFICATIONS
EQUIPMENT AND OPERATOR SPECIFICATIONS
A) Manner of Construction - Excavation will be done in a manner which will minimize sedimentation in the stream
channel. Silt fence will be installed downstream of the construction area to reduce the risk of sediment entering
the stream.
B) Equipment Operator Performance - Equipment operators shall be experienced and competent in the use of the
equipment to which they are assigned. They shall be expected to demonstrate a level of proficiency with the
equipment which enables them to be productive in all aspects of stream restoration work. Equipment
operators shall be experienced in the construction of Rosgen designed structures; including the cross
vane, J-hook vane, and Toe-wood/Sod mat.
Operators will be instructed by the construction inspector as to the desired result of construction activities.
Operators will be responsible for determining how best to use equipment to achieve the desired results. Chain
saw operators will be required to cut trees, limbs and root masses as necessary to facilitate the removal and
placement of debris in the stream.
C) Environmental Considerations - Earth moving equipment will cross and operate in the streamflow only when
necessary and only when directed to do so by the construction inspector. Equipment shall be new or of low
hours and be maintained to prevent fuel, oil and lubricant spills in the vicinity of the stream. Refueling, repairs
and lubrication will be performed at a safe distances from the stream and only at locations approved by the
construction inspector where water is controlled by runoff control measures. Equipment shall be clean; free
of mud and plant seeds when arriving to the construction site to control non-native weed introdution.
D) Safety Considerations -At work sites, where equipment will be operated on Forest Roads, flagman shall be
stationed to warn oncoming traffic of congestion. Construction road signs shall be in place and a means of
removing sediment, mud or rocks from roadways shall be established. The contractor will be responsible for
the implementation of these measures.
E) Equipment Specifications
Hydraulic Excavator:
Track mounted, hydraulic powered.
Excavator:
Weight Range—30,000-41,000 Ibs
Min. Reach —25 feet
Min Digging Depth — 19 feet
Min Bucket size—0.6 Cu Yd.
Min 100 HP
Equipped with hydraulic thumb, with experienced operator as described above. (More than 1 excavator
may be required. Unit price bid should be for one excavator for one hour of running time).
Dump—Track Truck:
Track mounted
Min. weight—8,000 Ibs
Min. carrying capacity—7,000 Ibs
(Unit price bid should be for one truck for one hour of running time and experienced operator).
Payment will be made under:
Hydraulic Excavator/Mobilization........................................................................HOURS/EACH
Dump—Track Truck/Mobilization........................................................................HOURS/EACH
Cheek Creek Stream Rehabilitation Project Page 1

IN-STREAM STRUCTURES SPECIFICATIONS
Structure Stone
Description
The work covered by this section consists of furnishing, stockpiling, placing and maintaining approved stone to be
utilized to construct rock and log vanes, root wad structures,the step-pool structures, stream crossings,sediment and
erosion control measures for use in locations as directed by the Designer.The quantity of stone may be increased,
decreased,or eliminated entirely at the direction of the Designer. Such variations in quantity will not be considered as
alterations in the details of construction or a change in the character of the work.
Materials
Stone for"Boulder'shall consist of blasted stone or other stone approved by the Designer.All stone shall be largely
clean of fines, sound,tough, dense, resistant to the action of air and water, and suitable in all other respects for the
purpose intended.
All stone shall meet the approval of the Designer.While no specific gradation is required,the various sizes of the stone
shall be equally distributed within the required size range.The size of an individual stone particle will be determined by
measuring its long dimension.
Accept nce Criteria for Stone
REQUIRED STONE SIZES (INCHES)
CLASS Minimum Average Maximum
Boulder 36 48 60
48"x 30"x 20"
No more than 5 percent of the material furnished can be less than the minimum size specified, more than 10 percent of
the material can exceed the maximum size specified. Boulders shall be relatively flat on either side in the same
dimension, preferably the long dimension.
Construction
The Contractor shall place stone, in locations shown on the construction plans to the thickness,widths, and lengths as
shown on the construction plans or directed by the Designer.All stone shall be placed neatly and uniformly with an even
surface to form an in-stream structure or a sediment and erosion control device or in accordance with the construction
plans and special provisions, and shall meet the approval of the Designer.
Method of Measurement
The quantity of stone required to construct the structures or sediment and erosion control measures detailed in these
special provisions will be incidental to those bid items. However,field conditions may warrant the need for additional stone
greater than the quantity specified or detailed for each bid item.The quantity of stone that has been incorporated into the
project, as directed or approved by the Designer,which exceeds 110%of the quantity required for each bid item will be
measured by weight. Measured by weight will require the quantity to be weighed in trucks on certified platform scales.
Stone that was previously stockpiled for other bid items will not be measured a second time for this provision.
Basis of Payment
When field conditions dictate the need for additional quantity greater than 10% of the bid item, the quantity of stone
measured as provided above, will be paid for at the contract unit price per ton for "Boulder". Such price and
payment will be full compensation for all work covered by this section, including but not limited to furnishing,
weighing, stockpiling, re-handling, placing, and maintaining the stone and disposal of any materials not
incorporated into the project if directed by the Designer.
Payment will be made under:
Boulder...........................................................................................................................................TON
Cheek Creek Stream Rehabilitation Project Page 2

Log Vane
Description
This structure serves to decrease stress in the near-bank region while promoting scouring in the downstream pool.
Logs are placed at an angle to the stream bank, gradually inclining in elevation until they are located near'/z
bankfull elevation directly adjacent to the stream bank. Water flowing downstream is forced over these logs towards
the middle of the channel, effectively scouring out a pool below. The quantity of log vanes may be increased,
decreased, or eliminated entirely at the direction of the designer. Such variations in quantity will not be considered
as alterations in the details of construction or a change in the character of the work.
Materials
Trees to be used for the vane shall be provided by the Forest Service from near the site. All log materials shall be
at least 10 inches in diameter. A sheet of non-woven geotextile fabric (4oz. or greater, 6 feet wide) shall be
placed the length of the vane arm on the upstream side, nailed or stapled to the top log in a manner that they will
be out of site when covered by back fill material. Back fill material shall be obtained from the stream channel bed.
Installation
An excavator, with a bucket that includes a hydraulic thumb, shall be used to push designated trees over to make
the vane logs. Placement of logs to fashion the log vane shall occur under the supervision of Designer. A trench
shall be dug in such a manner that the upstream end of the footer and header logs are buried beneath the bed
surface elevation and pinched with boulders. Logs shall be tightly sealed with minimal gaps between the header
and footer log. Filter fabric shall be placed on the upstream side of the structure, extend from near the toe of the
bank to the header log and shall be placed the entire length of the structure. This area shall be backfilled with
materials excavated on-site to prevent the washout of sediment through log gaps. Header and footer logs shall be
tied in securely to the bank in such a way that eliminates the possibility of water diverting around them. Structures
shall be built to the approval of the Designer. The Designer may adjust the number and placement of structures in
the field.
Basis of Payment
This payment shall be considered full compensation for all labor, equipment, hauling, placing, handling, sorting,
fitting, materials, and incidentals necessary to construct the Log Vane. Trees to be used for the vane shall be
provided by the Forest Service.
Payment will be made under:
Equipment& Labor............................................................................................HOURS
Materials:
Non-woven geotextile fabric................................................................LINEAR FOOT
Cheek Creek Stream Rehabilitation Project Page 3

o
1/8 TO 1/4 OF LOGS BURIED C)
IN STREAM BED WITH
2:1
Log Vane Detail BOULEDELEV ELEVATION
R
BED ELEVATION SLOPE
TO
BANKFULI
MATERIAL FROM POOL USED TO
f•.,1 CONSTRUCT INNER BERM&
BACKFILL
P
0
PLAN VIEW
LOGSPLACED ATA20-ANGLE
'. FRO MBANKANDATA2-3%
tr':.:`• SLOPE FROM%BANKFULL
MATERIAL F';_�„ ELEVATION AT STREAMBANK
FROM POOL
USED TO
CONSTRUCT 1,35,. ]345. {
INNER BERM ........ ..........41.......................... ..... 5 ••
CONSTRUCTED POOL MAX.DEPTH
" ,;.
@ W�DOWNSTREAM FROM a1
INVERT
PL
BAnkfullel—tion ''0-
X-SECTION VIEW '^°
SILL LOG
.yl -7'IN BANK
PLACED RIVER ROCK .j..` :.
LOWFLOW
ELEVATION
/GC-OTE%TILE FABRIC O
_ HEADER LOG r
FOOTER LOG l�
Constructed
vW 0 yaav D
Toe-wood/Sod mat (bankfull bench)
Description
This structure serves to protect a length of stream bank by biulding a new bank with a bankfull area where one did
not exist before due to unstable conditions (See Toe-wood/Sod mat detail below). The structure creates a large
undercut bank providing an abundance of aquatic cover type habitat.
Materials
Trees and brush to be used for the structure shall be provided by the Forest Service from near the site. Shrubs
and willow shall be provided by the Forest Service from near the site. Excavated soil shall be dispersed on the
site. Seed, mulch, and Coir 700 matting (6-8 feet wide) shall be provided and installed by the contractor.
Installation
The channel shall be excavated to build a bench on the channel bottom on the outside of the meander bend. Its
elevation shall be well below determined low water elevation. A deep pool shall be constructed where the new
thalweg will be located and excavated material shall be used to build the point bar and back fill the structure. Footer
logs laying parrallel to the stream channel shall be placed on the bench, then the toe-wood on top of that. Toe-
wood shall consist of a mixture of sizes, but include several large tree stems with root wads attached. Stems shall
be pushed into the bank were possible. Trees, brush, and limbs shall all be used to fill this area with woody debris,
and be placed up to the low flow elevation. Bundles of live stakes, e.g. willow, shall be placed on top of the woody
debris and alluvial backfill shall be placed on the structure (amount determined by Designer). Shrubs, excavated
from nearby, shall be placed on top of the toe-wood up to the bankfull elevation. This shrub mat will replace the
"sod mat". From the bankfull elevation the verticle slope shall be excavated to the 2:1 slope (run to rise). Excavated
soil material shall be scattered on the adjacent terrace. All slopes shall have seed, mulch, and coir matting
installed. Riparian plantings shall be installed on the slope and during the plant dormant season, live stakes shall
be installed in the bench and bank.
Cheek Creek Stream Rehabilitation Project Page 4

Stabilization of Vertical Banks on outside Meander Bend
Terrace elevation Construction of Bankfull Bench using TOE WOOD/SOD MAT DETAIL
EXCAVATED BANK MATERIAL
CONSTRUCTION ITEMS AND
SEQUENCE:
Excavate high bank to construct a
2:1 slope from bankfull to terrace ....................... ..............5.aDKfVII.El9Y.dQn.....................
elevation �-
Excavate&construct toe wood
bench and new channel pool
feature based on reference pool SOD MAT
dimensions
i
Place trees/logs/tops on toe wood
bench&in toe of bank below low Low flow Elevation
flow _ _
Place willow cuttings/bundles on
toe wood
• Excavate sod mats(using a front TOE WOOD
end loader)or shrub transplants ; Pre-Construction
-
(e.g.alder,willow)and place on toe _ Channel Bottomni--------
wood up to bankfull elevation FOOTER LOGS Toe wood nenon -
Seed bank with native grass seed
Cover sod mat and sloped bank
with coir erosion control matting Channel Bottom
Plant willow/silky
dogwood/elderberry cuttings into
relocated sod mat and bank to help Brady Dodd
"pin"sod into bank NFNC Hydro
Basis of Payment
This payment shall be considered full compensation for all labor, equipment, hauling, placing, handling, sorting,
fitting, materials, and incidentals necessary to construct the bankfull bench. Trees to be used for the structure shall
be provided by the Forest Service.
Payment will be made under:
Equipment& Labor................................................................................................HOURS
Materials:
Matting, Coir- 700 ..................................................................................... LINEAR FOOT
EROSION CONTROL SPECIFICATIONS
Seed & Mulch
Description
Seeding shall occur within 24 hours of ground disturbing activities. Seed shall be applied by hand or with a cyclone
seeder and on steep slopes be immediately covered certified weedfree wheat or pine straw. On streambanks, Coir
700 matting shall be placed to keep seed and soil in place. Below are native grass species to be sown and their
seeding density of pure live seed.
Community Type:Riparian
Scientific Name Common Name Planting Density
EI mus vir inicus Virginia wild rye 22 Ibs/acre
Festuca rubra Creeping red fescue 5 Ibs/acre
Dichanthelium clandestinum Deerton ue 2 Ibs/acre
Materials
All materials shall meet the approval of the Designer.
Cheek Creek Stream Rehabilitation Project Page 5

Basis of Payment
Payment for installation of seed and mulch will be paid for as outlined.This payment shall be considered full compensation for
all labor, equipment,furnishing materials, hauling, rehandling, sorting, materials, and incidentals necessary to seed and
mulch.
Payment will be made under:
Seed ...............................................................................................................................ACRE
Matting
Materials
All materials shall meet the approval of the Designer and include Coir fiber mat (700 weight, 6.5 feet wide), hardwood
stakes, and live stakes (see"Planting" Specs).
Installation
Coir fiber mat shall be used on upper and lower stream banks (above and below the bankfull elevation). The
matting shall be fastened in place using both hardwood and pine stakes. Provide stakes made of hardwood, 2' tall
and 1 inch square, to anchor the matting along the edges. These edge-stakes shall be installed to no less than 1
foot deep. Also, provide 1' tall pine wood stakes for the interior of the matting.
Place the matting upon final grading, following seed and mulch application. Provide a smooth soil surface free from
stones, clods, or debris which will prevent the contact of the matting with the soil. Unroll the matting on the contour,
starting at the bottom of the slope and apply without stretching such that it will lie smoothly but loosely on the soil
surface. Bury the top end of each piece of matting in a narrow trench at least 6 in. (150 mm) deep and tamp firmly
after staking with evenly spaced stakes. Stake the matting according to the manufactures recommended pattern for
specific product and slope. Where one roll of matting ends and a second roll begins, install matting end-over-end
with approximately 6 inches of overlap. Stake through overlapped area. Install stakes across the matting at ends,
junctions, and trenches approximately 3 feet apart, no less than 1 foot deep.
Basis of Payment
Payment for installation of matting will be paid for as outlined.This payment shall be considered full compensation for all labor,
equipment, furnishing materials, hauling, stockpiling, rehandling, sorting, fitting, materials, and incidentals necessary to
install matting.
Payment will be made under:
Matting ..................................................................................................................LINEAR FEET
Plantings
Description
Plantings shall consist of container and live staking. Plantings from containers shall be from one gallon containers
and can be planted throughout the year. Live staking shall occur during plant dormancy. Below is a list of woody
vegetation species to be planted on stream banks and floodplains.
Scientific Name Common Name Percent of plantings Spacing feet
Container& Bare Root Species:
Alnus serrulata Tag Alder 20% 3
Cal canthus floridus Sweetshrub 10% 3
Clethra acuminata Cinnamon Bark Clethra 10% 4
Hamamelis vir iniana Witch Hazel 10% 4
Hypericurn densiflorum Bushy St. Johns 10% 4
Itea vir inica 10% 4
Xanthorhiza sim licissima Yellowroot 10% 2.5
Platanus occidentalis Sycamore 20% 6
Live Stake Species:
Cornus ammonum silky dogwood 10 3
Salix ni ra black willow 20 3
Cheek Creek Stream Rehabilitation Project Page 6

Salix sericea silky willow 20 3
Salix humilis prairie willow 10 3
Sambucus canadensis common elderberry 30 3
Ph socarpus opulifolius ninebark 10 3
Materials
All materials shall meet the approval of the Designer.
Basis of Payment
Payment for installation of plantings will be paid for as outlined.This payment shall be considered full compensation for all labor,
equipment,furnishing materials,hauling,rehandling, sorting, materials, and incidentals necessary to plant.
Payment will be made under:
Plantings............................................................................................................................EACH
Cheek Creek Stream Rehabilitation Project Page 7