2024-09-27 BC14 Specifications.pdf

CONSTRUCTION AND MATERIAL SPECIFICATIONS FOR

Brush Creek Site 14 Dam Rehabilitation (WV05510) Mercer County, West Virginia

Prepared for the USDA Natural Resources Conservation Service

Contract #12SPEC18D0023 Task Order #12SPEC18F0053 Aterra-Schnabel Reference 18proj007 September 27, 2024

09/27/24

Jonathan M. Pittman, PE

WV Professional Engineer No. 23485

NRCS – 09/24

Brush Creek Site 14 Dam (WV05510) Rehabilitation Project

This Page Intentionally Left Blank

CONSTRUCTION SPECIFICATIONS CONTENTS

Construction Specification

Title Version Date

2 Clearing and Grubbing May 2001

3 Structure Removal May 2001

5 Pollution Control January 2014

6 Seeding, Sprigging, and Mulching Amend. 2, Sept. 2018

7 Construction Surveys January 2009

8 Mobilization and Demobilization May 2001

9 Traffic Control May 2001

10 Water for Construction January 2009

11 Removal of Water May 2001

21 Excavation May 2001

23 Earthfill February 2020

24 Drainfill May 2001

26 Topsoiling May 2001

31 Concrete for Major Structures Amend 2, Sept. 2018

34 Steel Reinforcement Amend. 2, Sept. 2018

36 Roller Compacted Concrete Amend 2, Sept. 2018

45 Plastic Pipe January 2009

61 Rock Riprap Amend. 2, Sept. 2018

63 Treatment of Rock Surfaces May 2001

65 Articulating Concrete Block Revetment System Amend. 2, Sept. 2018

71 Water Control Gates May 2001

81 Metal Fabrication and Installation May 2001

93 Identification Markers or Plaques May 2001

94 Contractor Quality Control January 2009

95 Geotextile January 2014

96 Field Office May 2001

97 Geomembrane Liner September 2014

401 Geotechnical Instrumentation September 2024

402 Permanent Access Roads September 2024

MATERIAL SPECIFICATIONS CONTENTS

Material Specification

Title Version Date

521 Aggregates for Drainfill and Filters 2nd Ed., February

522 Aggregates for Portland Cement Concrete 2nd Ed., February

523 Rock for Riprap 2nd Ed., Amend. 1, April 2022

524 Aggregates for Roller Compacted Concrete 2nd Ed., February

531 Portland Cement 2nd Ed., February

532 Supplementary Cementitious Materials 2nd Ed., February

533 Chemical Admixtures for Concrete 2nd Ed., February

534 Concrete Curing Compound 2nd Ed., February

535 Preformed Expansion Joint Filler 2nd Ed., February

Sealing Compound for Joints for Concrete and Concrete Pipe

2nd Ed., Amend. 1, April 2022

537 Nonmetallic Waterstops 2nd Ed., February

539 Steel Reinforcement (for concrete) 2nd Ed., Amend. 2, July 2022

547 Plastic Pipe 2nd Ed., Amend. 1, April 2022

552 Aluminum Corrugated Pipe 2nd Ed., February

571 Slide Gates 2nd Ed., Amend. 1, April 2022

581 Metal 2nd Ed., Amend. 1, April 2022

582 Galvanizing 2nd Ed., February

592 Geotextile 2nd Ed., Amend. 1, April 2022

594 Geomembrane Liner 2nd Ed., Amend. 1, April 2022

CONSTRUCTION SPECIFICATIONS

(210-VI-NEH, May 2001) 2-1

CONSTRUCTION SPECIFICATION 2—CLEARING AND GRUBBING

Scope

The work consists of clearing and grubbing and disposal of trees, snags, logs, brush, stumps, shrubs, and rubbish from the designated areas.

Protection of existing vegetation

Trees and other vegetation designated to remain undisturbed shall be protected from damage throughout the duration of the construction period. Any damages resulting from the contractor's operations or neglect shall be repaired by the contractor.

Earthfill, stockpiling of materials, vehicular parking, and excessive foot or vehicular traffic shall not be allowed within the drip line of vegetation designated to remain in place. Vegetation damaged by any of these or similar actions shall be replaced with viable vegetation of the same species, similar condition, and like size unless otherwise approved by the contracting officer.

Any cuts, skins, scrapes, or bruises to the bark of the vegetation shall be carefully trimmed and local nursery accepted procedures used to seal damaged bark.

Any limbs or branches 0.5 inch or larger in diameter that are broken, severed, or otherwise seriously damaged during construction shall be cut off at the base of the damaged limb or branch flush with the adjacent limb or tree trunk. All roots one (1) inch or larger in diameter that are cut, broken, or otherwise severed during construction operations shall have the end smoothly cut perpendicular to the root. Roots exposed during excavation or other operations shall be covered with moist earth or backfilled as soon as possible to prevent the roots from drying out.

Marking

The limits of the area(s) to be cleared and grubbed will be marked by stakes, flags, tree markings, or other suitable methods. Trees to be left standing and uninjured will be designated by special markings placed on the trunk about six (6) feet above the ground surface.

Clearing and grubbing

All trees not marked for preservation and all snags, logs, brush, stumps, shrubs, rubbish, and similar materials shall be cleared from within the limits of the designated areas. Unless otherwise specified, all stumps, roots, and root clusters that have a diameter of one (1) inch or larger shall be grubbed out to a depth of at least two (2) feet below subgrade for concrete structures and one (1) foot below the ground surface at embankment sites and other designated areas.

Disposal

All materials cleared and grubbed from the designated areas shall be disposed of at locations shown on the drawings or in a manner specified in Section 7. The contractor is responsible for complying with all local rules and regulations and the payment of any and all fees that may result from disposal at locations away from the project site.

Measurement and payment

Method 1 — For items of work for which specific units prices are established in the contract, the cleared and grubbed area is measured to the nearest 0.1 acre. Payment for clearing and grubbing is made for the total area within the designated limits at the contract unit price. Such payment will constitute full

(210-VI-NEH, May 2001) 2-2 compensation for all labor, equipment, tools, and all other items necessary and incidental to the completion of the work.

Method 2 — For items of work for which specific unit prices are established in the contract, the length of the cleared and grubbed area is measured to the nearest full station (100 feet) along the line designated on the drawing or identified in the specifications. Payment for clearing and grubbing is made for the total length within the designated limits at the contract unit price. Such payment will constitute full compensation for all labor, equipment, tools, and all other items necessary and incidental to the completion of the work.

Method 3 — For items of work for which specific unit prices are established in the contract, each tree, stump, and snag having a diameter of 4 inches or larger and each log having a diameter of 4 inches or larger and a length of 10 feet are measured before removal. The size of each tree and snag is determined by measuring its trunk at breast height above the natural ground surface. The size of each log is determined by measuring the butt and by measuring its length from butt to tip. The size of each stump is measured at the top. Diameter is determined by dividing the measured circumference by 3.14.

Payment for clearing and grubbing of each tree, stump, and snag having a diameter of 4 inches or larger and each log having a diameter of 4 inches or larger and a length of 10 feet or larger is made at the contract unit price for its size designation as determined by the following schedule:

Measured diameter Size designation

(in) (in)

4 to 8 6

8 to 12 10

12 to 24 18

24 to 36 30

36 to 60 48

Over 60 60

The sum of such payments shall constitute full compensation for clearing and grubbing (including the clearing and grubbing of smaller trees, stumps, snags, logs, brush, shrubs, and roots), applicable permits and associated fees, and rubbish removal. Such payment shall constitute full compensation for all labor, equipment, tools, and all other items necessary and incidental to the completion of the work.

Method 4 — For items of work for which specific lump sum prices are established in the contract, payment for clearing and grubbing is made at the contract lump sum price. Such payment shall constitute full compensation for all labor, equipment, tools, and all other items necessary and incidental to the completion of the work.

All Methods — The following provisions apply to all methods of measurement and payment.

Compensation for any item of work described in the contract, but not listed in the bid schedule will be included in the payment for the item of work to which it is made subsidiary. Such items and the items to which they are made subsidiary are identified in Section 7.

Brush Creek Site 14 Dam (WV05510) Rehabilitation Project 2-3

Items of work and construction details

Items of work to be performed in conformance with this specification and construction details are:

A. Bid Item 1 – Clearing and Grubbing

1) This item shall consist of all clearing and grubbing required for the installation of the works of improvement as shown on the Drawings, including but not limited to trees, brush, and woody vegetation in:

a. Excavated and fill areas;

b. On and within 25 feet of the dam and associated appurtenances; and

c. All areas necessary for implementation of the erosion and sediment control plan as approved by authorities having jurisdiction.

2) The Contractor shall submit a Clearing and Grubbing Plan illustrating the proposed limits, schedule, methods of clearing and disposal, proposed offsite disposal locations and permits to the COR for approval within 21 days of contract award and prior to beginning the work.

The Contractor shall also survey and flag the limits of clearing and grubbing for approval by the COR prior to the start of clearing operations. Clearing and grubbing operations shall not begin until the plan and flagged limits have been approved. Blasting is not allowed.

3) In Section 4, Clearing and Grubbing, all stumps, roots, and root clusters greater than 1 inch in diameter shall be removed regardless of depth below subgrade.

4) In Section 5, Disposal, no disposal will be allowed on site. All materials resulting from Clearing and Grubbing shall become the property of the Contractor and shall be removed from the site and disposed of in accordance with all applicable federal, state, and local regulations.

5) Burning of trees, limbs, and brush shall be local to the area being cleared and shall have a minimum buffer of 150 feet maintained between the burn area and any existing structures and trees. Burning shall be accomplished at such times and manner as to minimize the annoyance or discomfort to the inhabitants of the area and not create nuisance conditions.

The initiation of burning shall commence no earlier than one hour after sunrise and shall be completed on the same day not later than one hour before sunset, and shall be attended by a responsible party at all times during the active burn phase. Burning shall be in accordance with state and local regulations.

6) Burying burned debris on site will not be a permitted. Remove from the site any portions of the material to be burned that do not completely combust, including all ashes. Dispose of the remaining materials in accordance with all applicable federal, state, and local regulations.

7) Land clearing debris (trees, limbs, and brush) may be mulched onsite using a wood chipper.

The location of mulch stockpiles shall be approved by the COR. Mulch may be used for erosion control. All unused mulch shall be disposed of off-site by the Contractor at the conclusion of the project. Land clearing debris (trees, snags, logs, brush, shrubs, and stumps) too large to be mulched, which are not burned, shall be disposed of off-site by the Contractor.

8) Costs for off-site disposal and all necessary permits and fees shall be incidental to the item of work.

Brush Creek Site 14 Dam (WV05510) Rehabilitation Project 2-4

9) All trees, snags, logs, brush, shrubs, stumps, and rubbish that are felled, detached, or otherwise dislocated in or near the lake or stream channels shall be disposed of as specified or removed to higher ground prior to the end of each workday. The Contractor is to take precaution, when temporarily stockpiling cleared and grubbed materials, to guard against such cleared and grubbed materials being floated or transported off the worksite by rainstorm runoff.

10) Upon completion of the clearing and grubbing operation, all areas which have been cleared shall be dressed to be reasonably smooth by blading, dragging or floating. The entire area shall be reasonably free of abrupt mounds, dips and windrows to provide a clear area for construction staking. Earthfill for repairing grubbed areas shall be placed in accordance with Construction Specification 23, Earthfill and shall be incidental to the completion of the work.

11) All trash (rubbish) and all other such waste and refuse materials shall be removed from the worksite and disposed of an approved landfill in accordance with all state and local regulations and laws. Costs for off-site disposal, including all necessary permits and fees, shall be incidental to the item of work.

12) In Section 6, Measurement and Payment, Method 1 shall apply. Measurement is based on horizontal distance (distance in plain view) of the final cleared and grubbed areas.

**End of Construction Specification 2**

(210-VI-NEH, May 2001) 3-1

CONSTRUCTION SPECIFICATION 3—STRUCTURE REMOVAL

Scope The work shall consist of the removal, salvage, and disposal of structures (including fences) from the designated areas.

Marking Method 1—Each structure or structure part to be removed will be marked with stakes, flags, paint, or other suitable method.

Method 2—The area boundaries from which structures must be removed will be marked using stakes, flags, paint, or other suitable method. Structures to remain undisturbed or to be salvaged will be designated by special markings.

Removal Method 1—All structures designated for removal in the contract shall be removed to the specified extent and depth.

Method 2—Within the areas so marked, all visible and buried structures identified shall be removed to the specified extent and depth.

Salvage Structures or structure parts that are designated to be salvaged shall be carefully removed and neatly placed in the specified or approved storage location. Salvaged structures that are capable of being disassembled shall be dismantled into individual members or sections. Such structures shall be neatly and systematically match marked with paint before disassembly. All connectors and other parts shall be marked to indicate their proper location within the structure and shall be fastened to the appropriate structural member or packed in suitable containers.

Material from fences designated to be salvaged shall be placed outside the work area on the property on which the fence was originally located. Fence wire shall be rolled into uniform rolls of suitable size and neatly piled with other salvaged materials. Posts and rails shall be neatly stacked.

Disposal of refuse materials Refuse materials resulting from structure removal shall be disposed of in a manner and at locations specified in Section 7 of this specification or in an acceptable manner and at locations approved by the contracting officer. Disposal by burning shall be in accordance with local rules and regulations.

Measurement and payment Method 1—For items of work for which specific unit prices are established by the contract, payment for the removal of each structure unit, except fences, is made at the contract unit price. Fences removed or removed and salvaged are measured to the nearest linear foot. Payment for fence removal or removal and salvage is made at the contract unit prices for each type and size of fence.

Such payment will constitute full compensation for all labor, equipment, tools, applicable permits and associated fees for burning and disposal of refuse, and all other items necessary and incidental to the completion of the work.

Method 2—For items of work for which specific lump sum prices are established by the contract, payment for structure removal is made at the contract lump sum price.

(210-VI-NEH, May 2001) 3-2

Such payment will constitute full compensation for all labor, equipment, tools, applicable permits and associated fees for burning and disposal of refuse, and all other items necessary and incidental to the completion of the work.

All Methods—The following provisions apply to all methods of measurement and payment.

Compensation for any item of work described in the contract, but not listed as a contract line item number in the bid schedule, is included in the payment for the item of work to which it is made subsidiary. Such items and items to which they are made subsidiary are identified in Section 7 of this specification.

Brush Creek Site 14 Dam (WV05510) - Rehabilitation Project 3-3

A. Bid Item 2 – Structure Removal

1) This item shall consist of the removal and disposal of structures shown on the Drawings and as specified herein, including the existing principal spillway riser and appurtenances and any other miscellaneous structures required for performance of the work as approved by the COR. This item also includes removal and stockpiling of existing riprap.

2) This item also consists of removal of sections of the existing 8-inch water supply pipe located within the auxiliary spillway and limits shown on the Drawings. The Contractor shall permanently cap the pipe sections which remain, as well as pipe sections which remain in the vicinity of the principal spillway riser.

3) The existing principal spillway riser shall be removed without damaging the existing principal spillway conduit and concrete cradle. Any damage to the existing principal spillway conduit and cradle (including the spigot end and steel bell) shall be repaired as directed by the COR at the Contractor’s expense and no additional cost to the Government.

4) Earthfill used for repairing areas damaged by structure removal shall be placed in accordance with Construction Specification 23, Earthfill and shall be incidental to the completion of the work.

5) The Contractor shall submit a Demolition Plan to the COR for approval at least 45 days prior to beginning work activity. At a minimum, the Plan shall include / indicate:

a. Schedule and sequence of demolition activities.

b. Required preparatory tasks.

c. Coordination with other construction activities such as pollution control and stream diversion.

d. Proposed demolition methods for each structure, buried utility, or facility as shown on the Drawings, including equipment needs.

e. Materials, methods, and sequence for protection of existing structures to remain.

f. Material disposal plans, including the locations of proposed off-site disposal facilities.

g. Means and methods to remove sections of the existing 8-inch water supply pipe located within the auxiliary spillway as shown on the Drawings and to permanently cap the pipe sections designated to remain.

h. Any interruptions required for utility and other services (as necessary).

6) In Section 2 – Marking, Method 1 will apply. The Contractor shall be responsible for marking.

7) Section 3 – Removal, Method 1 will apply. Structures designated for removal are shown on the Drawings.

8) In Section 4 – Salvage, no structures are designated to be salvaged.

9) In Section 5 – Disposal of Refuse Materials, refuse materials resulting from structural removal shall become the property of the Contractor and shall be removed from the site and disposed of in accordance with all applicable federal, state, and local regulations. The disposal location is subject to the approval of the Contracting Officer. Burning of refuse materials and blasting shall not be allowed on site. Costs for offsite disposal, including all necessary permits and fees, shall be incidental to the work.

Brush Creek Site 14 Dam (WV05510) - Rehabilitation Project 3-4

10) In Section 6 – Measurement and Payment, Method 2 will apply. Progress payments may be prorated based on the contract lump sum price in accordance with the planned construction schedule.

B. Bid Item 3 – Trench Drain and 8-Inch DIP Abandonment

1) This item includes furnishing all labor, equipment, materials, and other items necessary and incidental to flushing, inspecting, and abandoning in-place the existing 8-inch diameter corrugated metal pipe (CMP) collector pipes and outlet pipes within the existing trench drains as shown on the Drawings and specified herein. There are two drain pipes located on either side of the existing principal spillway conduit. The existing trench drain consists of both perforated and solid-wall piping. All work associated with abandoning the trench drain piping shall be completed prior to beginning excavation for new embankment toe drain.

2) This item also includes furnishing all labor, equipment, materials, and other items necessary and incidental to flushing, inspecting, and abandoning in-place the existing 8-inch ductile iron pipe (DIP) located adjacent to the PSW riser and within the ASW.

3) The Contractor is required to submit a Conduit Abandonment Plan to the COR at least 45 days prior to beginning work activity. The Conduit Abandonment Plan shall address the following:

a. Proposed work sequence and schedule from the start to finish of grouting operations.

b. Narrative explaining proposed work sequence and schedule for abandoning 8-inch DIP in relation to adjacent PSW riser and RCC cutoff excavations.

c. Means and methods to clean, inspect, and tremie grout the existing trench drain pipes and 8-inch DIP.

d. Methods to monitor placed grout volumes and grout pressure and to demonstrate that the entire pipe volume is fully grouted. Batching and pumping rate shall be indicated.

Quantify the volume of grout during the grouting operation to confirm the pipe is completely grouted. Address the installation of bulkheads, vents, grout nipples, slick lines, and any other materials and equipment necessary to maintain pressure and flow of the mix.

e. Proposed non-shrink grout mix design, including test results indicating compliance with these Specifications. Include a detailed description of the mechanisms that will be used for producing and conveying the job mix into the conduit. Once approved by the COR, the statement of materials and proportions will constitute the job mix. Any change to the job mix must be approved by the COR.

f. Proposed mixing, pumping and conveying equipment.

4) Provide a cementitious, non-shrink grout designed by the Contractor to completely fill the full length of the pipe completely to the crown of the pipe. Grout mix shall consist of a mixture of Type I/II Portland Cement (ASTM C150), water, admixtures, sand, and/or bulk filler. Sand shall be Fine Aggregate for Portland Cement Concrete meeting the requirements of West Virginia Department of Transportation Division of Highways Standard Specifications Roads and Bridges Section 702. All admixtures shall conform to the requirements of Material Specification 533, Chemical Admixtures for Concrete. Grout mix ratios shall be expressed in cubic feet (cf) of water to bag of cement to cubic feet bulk filler [W (cf):C (bag):BF (cf)].

Cement shall be furnished in 47 or 94-lb bags. Grout mix shall meet the following requirements:

a. Grout mix shall have a minimum water to cement ratio of 0.5 and a maximum water to cement ratio of 1.0. Other additives will be expressed in pounds, gallons, or pints to one bag of cement.

Brush Creek Site 14 Dam (WV05510) - Rehabilitation Project 3-5

b. Marsh Funnel time shall be between 40 and 90 seconds when tested in accordance with ASTM D6910. Contractor shall perform this testing in the presence of the COR for each proposed grout mix.

c. Grout mix shall have a maximum bleed of 2 percent when tested in accordance with ASTM DC940. Contractor shall perform this testing in the presence of the COR for each proposed grout mix.

d. Collect six (6) 2-inch by 4-inch cylinders per mix. Perform compressive strength testing at 3, 7, and 28 days in accordance with ASTM C39. The remaining three cylinders will be kept for backup. Each proposed grout mix shall have a minimum compressive strength of 1,000 psi.

5) Provide mixer of the high speed colloidal type, equipped with a high speed diffuser centrifugal pump. Mixer shall be designed to mix cement, water, and bulk fillers thoroughly, and to produce a grout of uniform texture at the specified mix ratios. Provide one water flow meter.

The water flow meter shall be graduated in tenths of gallons or hundredths of cubic feet and shall be able to be reset.

6) Prior to beginning grouting operations, the Contractor shall flush the pipes with water and remove foreign objects and sediment. Flushing methods which may result in damage to the existing pipes and erosion of embankment soils will not be permitted.

7) Following flushing, the Contractor shall inspect the full length of each pipe using appropriate video equipment. The video inspection footage shall be provided to the COR for review and approval prior to grouting. Additional cleaning of the pipe may be required, as determined by the COR, after review of the video inspection footage.

8) Abandon the existing trench drain collector and outlet pipes and 8-inch DIP by placing the approved non-shrink grout mix through a tremie hose that extends to the upstream end of the existing pipes such that the pipe is filled from the upstream end toward the outlet (i.e., downstream) end. The injected grout volume shall be no less than the sum of the theoretical collector pipe and outlet pipe volumes. Monitor grout pressure at the bulkhead installed at the outlet. Maintain 2 psi of grout pressure at the pipe outlet for a minimum 10 minutes with zero pressure loss, at which point abandonment shall be considered complete. This procedure may be altered in the field by the COR to suit the conditions encountered and to meet the design objectives. Changes in the grout mix and grouting procedure shall be made when and as directed by the COR, and shall not be made without the approval of the COR.

9) Grout pressure shall not exceed 2 psi at the header unless specifically authorized by the COR. The pumping rate shall not exceed 3 cubic feet per minute (cfm).

10) The quantity of grout prepared in advance shall be kept to a minimum. Grout which has been kept in the mixer with or without agitation for longer than one hour shall be discarded, unless otherwise directed by the COR. For each pipe, grout placement shall occur during one continuous operation with no break in work shifts.

11) Grout temperatures shall be not lower than 50 degrees F and not higher than 90 degrees F at time of placement.

12) The Contractor shall keep a complete and accurate record of all grouting operations. This record shall include a time log of the grout mixes and admixtures used, the related pressures and grout take rates, back pressures, and observations on excessive leakage and other non-routine conditions. One copy of the records shall be furnished to the COR at the end of each shift, or as directed.

Brush Creek Site 14 Dam (WV05510) - Rehabilitation Project 3-6

13) The Contractor shall demonstrate to the satisfaction of the COR that the existing pipes are entirely filled with grout as defined. After the pipes are entirely filled with grout, install one new, permanently secured end cap at the outlet end of each pipe.

14) After grouting is completed, the Contractor shall remove the grouting plant and all related parts, equipment, and supplies from the site, including unused materials and waste that is unsightly or would interfere with efficient operation by others.

15) In Section 6 – Measurement and Payment, Method 2 will apply.

a. Measurement and Payment for quality control and testing in the section will be made under Bid Item 42 – Construction Quality Control in Construction Specification 94 – Construction Quality Control.

16) Items subsidiary to this Bid Item include:

a. Water for Construction, Construction Specification 10 – Water for Construction

**End of Construction Specification 3**

(210-VI-NEH, January 2014) 5-1

CONSTRUCTION SPECIFICATION 5—POLLUTION CONTROL

Scope The work consists of installing measures or performing work to control erosion and minimize the production of sediment and other pollutants to water and air from construction activities.

The following BioPreferred® product categories are applicable to this specification: — mulch and compost materials:

– erosion control materials

– fertilizers

– dust suppressants

– agricultural spray adjuvants

Material Silt fence shall conform to the requirement of Materials Specification 592, Geotextile. All other material furnished shall meet the requirements of the material specifications listed in Section 8 of this specification.

Erosion and sediment control measures and works The measures and works shall include, but are not limited to, the following:

Staging of earthwork activities—The excavation and moving of soil materials shall be scheduled to minimize the size of areas disturbed and unprotected from erosion for the shortest reasonable time.

Seeding—Seeding to protect disturbed areas shall occur as soon as reasonably possible following completion of that earthwork activity.

Mulching—Mulching to provide temporary protection of the soil surface from erosion.

Diversions—Diversions to divert water from work areas and to collect water from work areas for treatment and safe disposition. They are temporary and shall be removed and the area restored to its near original condition when the diversions are no longer required or when permanent measures are installed.

Stream crossings—Culverts or bridges where equipment must cross streams. They are temporary and shall be removed and the area restored to its near original condition when the crossings are no longer required or when permanent measures are installed.

Sediment basins—Sediment basins collect, settle, and eliminate sediment from eroding areas from impacting properties and streams below the construction site(s). These basins are temporary and shall be removed and the area restored to its original condition when they are no longer required or when permanent measures are installed.

Sediment filters—Straw bale filters or geotextile silt fences trap sediment from areas of limited runoff.

Sediment filters shall be properly anchored to prevent erosion under or around them. Silt fences shall be installed and maintained in accordance with ASTM D6462. These filters are temporary and shall be removed and the area restored to its original condition when they are no longer required or when permanent measures are installed.

Waterways—Waterways for the safe disposal of runoff from fields, diversions, and other structures or measures. These works are temporary and shall be removed and the area restored to its original condition when they are no longer required or when permanent measures are installed.

(210-VI-NEH, January 2014) 5-2

Other—Additional protection measures as specified in Section 8 of this specification or required by Federal, State, or local government.

Chemical pollution The Contractor shall provide watertight tanks or barrels or construct a sump sealed with plastic sheets to collect and temporarily contain chemical pollutants, such as drained lubricating or transmission fluids, grease, soaps, concrete mixer washwater, or asphalt, produced as a by-product of the construction activities. Pollutants shall be disposed of in accordance with appropriate state and Federal regulations. At the completion of the construction work, tanks, barrels, and sumps shall be removed and the area restored to its original condition as specified in Section 8 of this specification. Sump removal shall be conducted without causing pollution.

Sanitary facilities, such as chemical toilets, or septic tanks shall not be located next to live streams, wells, or springs. They shall be located at a distance sufficient to prevent contamination of any water source. At the completion of construction activities, facilities shall be disposed of without causing pollution as specified in Section 8 of this specification.

Air pollution The burning of brush or slash and the disposal of other materials shall adhere to state and local regulations.

Fire prevention measures shall be taken to prevent the start or spreading of wildfires that may result from project activities. Firebreaks or guards shall be constructed and maintained at locations shown on the drawings.

All public access or haul roads used by the Contractor during construction of the project shall be sprinkled or otherwise treated to fully suppress dust. All dust control methods shall ensure safe construction operations at all times. If chemical dust suppressants are applied, the material shall be a commercially available product specifically designed for dust suppression and the application shall follow manufacturer's requirements and recommendations. A copy of the product data sheet and manufacturer's recommended application procedures shall be provided to the Engineer 5 working days before the first application.

Maintenance, removal, and restoration All pollution control measures and temporary works shall be adequately maintained in a functional condition for the duration of the construction period. All temporary measures shall be removed and the site restored to near original condition.

Measurement and payment Method 1—For items of work for which specific unit prices are established in the contract, each item is measured to the nearest unit applicable. Payment for each item is made at the contract unit price for that item. For water or chemical suppressant items used for dust control for which items of work are established in section 8 of this specification, measurement for payment will not include water or chemical suppressants that are used inappropriately or excessive to need. Such payment will constitute full compensation for the completion of the work.

Method 2—For items of work for which lump sum prices are established in the contract, payment is made as the work proceeds and supported by invoices presented by the contractor that reflect actual costs. If the total of all progress payments is less than the lump sum contract price for this item, the balance remaining for this item will be included in the final contract payment. Payment of the lump sum contract price will constitute full compensation for completion of the work.

Method 3—For items of work for which lump sum prices are established in the contract, payment will be prorated and provided in equal amounts on each monthly progress payment estimate. The number of months used for prorating shall be the number estimated to complete the work as outlined in the Contractor's approved construction schedule. The final month's prorate amount will be provided with the final contract payment. Payment as described will constitute full compensation for completion of the work.

(210-VI-NEH, January 2014) 5-3

All Methods—The following provisions apply to all methods of measurement and payment.

Compensation for any item of work described in the contract, but not listed in the bid schedule is included in the payment for the item of work to which it is made subsidiary. Such items, and the items to which they are made subsidiary, are identified in Section 8 of this specification.

Brush Creek Site 14 Dam (WV05510) - Rehabilitation Project 5-4

Items of work and construction details Items of work to be performed in conformance with this specification and construction details are:

A. Bid Item 4 – Pollution Control

1) The item shall consist of scheduling operations, obtaining the required permits, performing work and installing, maintaining, and removing temporary erosion and sediment control measures to control erosion and minimize the production of sediment and other pollutants to water and air from construction activities as specified herein and in accordance with all applicable West Virginia Department of Environmental Protection (WVDEP) and County Conservation District rules, regulations, and permits.

2) The Project Sponsors have obtained the Construction Stormwater General Permit from the WVDEP and have paid the applicable permit fees. The permit approval is based on the Stormwater Pollution Prevention Plan (SWPPP) shown on the Drawings. The Contractor is responsible for implementation and maintenance of the SWPPP controls in accordance with the Drawings and these Specifications. If the Contractor’s plan of work differs from the SWPPP design and permitted activities, then the Contractor is required to modify the SWPPP drawings and design documentation and to submit the proposed modifications to the COR for review within 21 days of contract award and prior to beginning work. If the Contractor’s proposed modifications are approved by the COR, then the Contractor shall prepare and submit the proposed modifications to the WVDEP at no additional cost to the Government and shall pay any and all applicable fees to support the modifications.

3) The Contractor shall prepare and submit a Pollution Control Plan (Plan) to the COR for approval within 21 days of contract award and prior to beginning work. The Plan shall supplement the approved erosion and sediment control measures and plan shown on the Drawings. This Plan shall include fill stockpile area(s), proposed equipment and material staging and storage area(s), vehicle and equipment maintenance area(s), vehicle and equipment fueling area, material staging area(s), and dewatering effluent filtering methods and locations. Product data sheets for all pollution control measures required and/or proposed, including those in the approved erosion and sediment control plan, shall also be included in the Plan.

4) The Pollution Control Plan Pollution Control Plan shall include a Spill Prevention and Response Plan. The major objectives are to ensure that:

a. All pollutants and their sources associated with construction activities are identified and controlled.

b. All non-stormwater discharges are identified and eliminated, controlled, or treated.

c. Selected best management practices (BMPs) are implemented properly and are effective in reducing or eliminating pollutants in discharges from construction activities.

d. Methods to implement BMP inspections and visual monitoring are instituted.

e. The Spill Prevention and Response Plan (SPRP) will

i. Identify personnel and their companies are responsible for the implementation of this SPRP: Name, Organization and Position Telephone Cell Number.

ii. Describe how onsite and offsite spills, or the potential for spills, will be reported to the COR and Site Superintendent.

iii. How the magnitude and risk associated with the spill will be determine, the most effective way to contain and clean the spill, and evaluate if there was a release of any chemicals offsite due to the spill that should be reported.

f. Describe the Best Management Practices to be used to prevent spills and respond to spills.

5) Land and water resources within the work limits but outside the limits of permanent work shall be preserved in their present condition or shall be restored to a condition that will appear to

Brush Creek Site 14 Dam (WV05510) - Rehabilitation Project 5-5 be natural and not distract from the appearance of the project.

6) The location of the Contractor’s camps, access and haul roads, storage, and other construction buildings, required temporarily in the performance of the work, shall be detailed in the Plan and approved by the COR prior to installation.

7) The Contractor shall not deface, injure, or destroy trees or shrubs beyond the limits shown on the Drawings, nor remove or cut them without special authority. No ropes, cables, or guys shall be fastened to or attached to any existing nearby trees for anchorage unless authorized by the COR.

8) Monuments, markers, works of art, and sites of natural, historical, or archaeological significance (if present) shall be protected before beginning operations near them.

9) In Section 2 – Material

a. In addition to the following material requirements, all vegetative and structural erosion and sediment control practices shall be constructed and maintained according to minimum standards and specifications of the West Virginia Erosion and Sediment Control Field Manual and West Virginia Erosion and Sediment Control Best Management Practice Manual. The most recent version at the time of bid advertisement of referenced Specifications shall apply and are available on the DEP and DOT web sites.

b. Each temporary stream crossing culvert shall meet AASHTO H-20 loading.

c. Compost Filter Sock shall have a minimum required diameter as shown on Drawings.

Wooden stakes shall be 2 inches by 2 inches by 48 inches. Smaller diameter barriers may be stacked in a pyramid configuration to achieve an effective diameter that equals or exceeds the minimum required diameter. The Contractor shall maintain a stockpile of 50-LF of each diameter Compost Filter Sock used on site for use as needed to avoid material delivery delays.

d. Temporary Construction Entrance shall consist of AASHTO No. 1 Coarse Aggregate meeting the requirements of West Virginia Department of Transportation Division of Highways Standard Specifications Roads and Bridges Section 704.6; and Separation Geotextile meeting the requirements of West Virginia Department of Transportation Division of Highways Standard Specifications Roads and Bridges Section 715.11.4.

e. Erosion Control Blanket shall consist of Type 2.D Short-Term Temporary Rolled Earth Erosion Control Product (RECP) meeting the requirements of the West Virginia Erosion and Sediment Control Best Management Practice Manual Section 3.13. The product shall contain 100% agricultural straw and two organic jute nets securely sewn together with biodegradable thread. Polypropylene netting is prohibited. Provide biodegradable stakes.

f. Pumped Water Filter Bag shall meet the requirements shown on the Drawings.

g. Temporary seeding and permanent seeding shall consist of the seed mixes shown in Construction Specification 6, Seeding, Sprigging, and Mulching and on the Drawings for the applicable times of year.

h. Weighted Filter Sock shall meet the requirements shown on the Drawings.

i. Diversion Compost Filter Sock shall meet the requirements shown on the Drawings.

j. Concrete Washout shall meet the requirements shown on the Drawings.

k. Compost sock sediment traps shall meet the requirements shown on the Drawings.

10) In Section 3 – Erosion and Sediment Control Measures and Works

a. Install Compost Filter Sock to the limits shown on the Drawings. The barrier shall meet flush with existing grade. Riprap or other materials shall be removed to accommodate

Brush Creek Site 14 Dam (WV05510) - Rehabilitation Project 5-6 a uniform grade for the installation. Support stakes shall be driven to the required depth below the existing ground surface at the intervals shown on the Drawings.

b. Silt fence and Super Silt Fence shall be installed to the limits shown on the Drawings and shall be installed in accordance with the details shown on the Drawings.

c. The Contractor shall install erosion control measures prior to, during, and after any earth disturbance and perform maintenance and corrective actions as deemed necessary by the COR and authorities having jurisdiction during and after installation of erosion control measures.

d. The formation of concentrated flows on the drainage slope above the Compost Filter Sock or other measures are not permitted. If concentrated flow does occur, direct slope stabilization measures shall be employed to prevent such conditions.

e. The temporary access road shall be constructed as shown on the Drawings.

f. Riprap stream protection at the discharge end of the pump around shall be constructed as shown on the Drawings.

g. Surface water shall be diverted away from excavations by means of diversion compost filter sock, diversion ditches, and diversion berms.

h. During dewatering operations, the effluent shall be filtered through a pumped water filter bag approved by the erosion control permitting agency or pumped into a temporary sediment trap that has been constructed in accordance with West Virginia Erosion and Sediment Control Field Manual and the West Virginia Erosion and Sediment Control Best Management Practice Manual, and shall be removed in their entirety from the site following completion of the work.

i. The Contractor shall schedule and conduct his operations to limit erosion of soils, and to prevent silting and muddying of downstream systems.

j. Construction of drainage facilities and performance of Work that will contribute to the control of erosion and sedimentation shall be carried out in conjunction with earthwork operations, or as soon thereafter as practicable. The area of bare soil exposed at any one time by construction operations shall be limited. Temporary seed and mulch areas within 4 days when areas will not be re-disturbed for more than 14 days.

k. The tires of all vehicles shall be cleaned prior to leaving the site. In the event that sediment is inadvertently tracked onto roadways, Contractor shall clean roadway in accordance with WVDEP requirements.

l. All access and haul roads used during construction shall have cross drains installed in all drainage ways. Road surfaces shall be free draining. Concentrations of water shall be directed into stabilized water courses or piped to stable outlets. Debris shall be disposed of at an approved landfill.

m. Concrete washdown of tools, concrete mixer chutes, hoppers, and the rear of vehicles shall be performed at the concrete waste management location identified in the approved Pollution Control Plan. Washout of the concrete mixer drum at the construction site is prohibited.

n. The Contractor shall not stockpile equipment, topsoil, materials, etc. in otherwise undisturbed areas and areas indicated for the preservation of existing vegetation.

o. Temporary soil stockpiles shall be stabilized with temporary seeding and mulching and protected with compost filter sock as shown on the Drawings.

p. Permanent seeding and mulching shall occur within 4 days of reaching final grade and final stabilization shall be within 4 day after construction is completed as outlined in Construction Specification 6, Seeding, Sprigging, and Mulching.

Brush Creek Site 14 Dam (WV05510) - Rehabilitation Project 5-7

q. The project site shall be available at all times for inspection by authorized employees of WVDEP and the Project Sponsors.

r. The Contractor shall always maintain copies of the approved Pollution Control Plan and SWPPP on site.

s. Should any specified measures prove incapable of adequately removing sediment from on-site flows prior to discharge of stabilizing the surface involved, additional measures shall be immediately implemented to address such problems. All costs for any additional measures are not eligible for additional compensation from the Federal Government or Project Sponsors.

11) In Section 4 – Chemical Pollution

a. All discharges leaving the site shall be composed entirely of storm water and natural stream flow, with the exception of discharges from firefighting activities; fire hydrant flushing; potable water sources including water line flushing; irrigation drainage; air conditioning condensate; springs; uncontaminated ground water; and foundation or footing drains where flows are not contaminated with process materials or pollutants.

b. Pollutants such as fuels, lubricants, bitumens, raw sewage, and other harmful materials shall not be discharged into or near rivers, streams and impoundments, or into natural or man-made channels leading thereto.

c. All applicable regulations of fish and wildlife agencies and statutes relating to the prevention and abatement of pollution shall be complied with.

d. Sanitary facilities such as chemical toilets, and sumps, tanks, or barrels used to temporarily store chemical pollutants such as drained lubricating oils, shall be disposed of in accordance with applicable regulations of the State of West Virginia.

12) In Section 5 – Air Pollution, there are no firebreaks or guards to be constructed.

13) In Section 6 – Maintenance, Removal, and Restoration

a. Until the site is stabilized, all erosion and sedimentation control measures shall be maintained properly. Maintenance shall include inspection of all erosion and sedimentation control every 4 days and within 24 hours after each runoff event of 0.25 inches or greater in a 24-hour period. All prevention and remedial maintenance work, including clean out, repair, replacement, regrading, reseeding, remulching, and renetting, shall be performed immediately and shall meet the standards of the West Virginia Erosion and Sediment Control Field Manual and the West Virginia Erosion and Sediment Control Best Management Practice Manual.

b. Any disturbed area on which activity has ceased and that will remain exposed for more than 14 days shall be seeded and mulched within 4 days. Apply temporary seed mix and mulch as specified in Construction Specification 6, Seeding, Sprigging, and Mulching. A permanent vegetative cover shall be applied to areas that will be left unworked for a period of more than 6 months. Areas mulched during the non-germinating period of December 1st to March 1st shall be limed, fertilized, seeded, and mulched by April 20.

c. All temporary erosion and sediment control measures shall be removed within 30 days after final site stabilization as determined by the Contracting Officer.

Brush Creek Site 14 Dam (WV05510) - Rehabilitation Project 5-8

14) In Section 7 – Measurement and Payment, Method 3 will apply.

15) Items of work subsidiary to this Bid Item are:

a. Temporary Seeding and Mulching, Construction Specification 6 – Seeding, Sprigging, and Mulching.

b. Water for Construction, Construction Specification 10 – Water for Construction

**End of Construction Specification 5**

(210-VI-NEH, Amend. 2, Sept. 2018) 6-1

CONSTRUCTION SPECIFICATION 6—SEEDING, SPRIGGING, AND MULCHING

1. Scope The work consists of preparing the area for treatment; furnishing and placing seed, sprigs, mulch, fertilizer,…