Attachment_1_-_Specifications.pdf

12SPEC18B0010 Attachment 1 - Specifications

Specification List Continued Marys Creek Dam No. 9 Rehabilitation Shelby County, Tennessee

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34 Steel Reinforcement (Subsidiary Item – By Others)

41 Reinforced Concrete Pressure Pipe Conduits

45 Plastic Pipe

51 Corrugated Metal Pipe

61 Rock Riprap (Bid Item 30 – By Others)

71 Water Control Gates (Bid Item 31 – By Others)

81 Metal Fabrication and Installation

83 Timber Fabrication and Installation

91 Chain Link Fence

94 Contractor Quality Control

95 Geotextile (Subsidiary Item – By Others)

425 Mineral Aggregate Fill

435 Construction Access Roads

MATERIAL SPECIFICATIONS

521 Aggregates for Drainfill and Filters

522 Aggregates for Portland Cement Concrete

523 Rock for Riprap

531 Portland Cement

532 Supplementary Cementitious Materials

533 Chemical Admixtures for Concrete

534 Concrete Curing Compound

535 Preformed Expansion Joint Filler

536 Sealing Compound for Joints for Concrete and

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Concrete Pipe

539 Steel Reinforcement (for concrete)

541 Reinforced Concrete Pressure Pipe

547 Plastic Pipe

552 Aluminum Corrugated Pipe

571 Slide Gates

581 Metal

582 Galvanizing

584 Structural Timber and Lumber

585 Wood Preservatives & Treatment

592 Geotextile

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UMARYS CREEK DAM NO. 9 REHABILITATION

USHELBY COUNTY, TENNESSEE

March 15, 2018

The items listed covers the subsidiary work required for the PL-566 Watershed Rehabilitation project located at Marys Creek Dam No. 9 in Shelby County, Tennessee.

The Contractor is responsible for all work specified except for Items of Work designated as “By Others.” Work designated as “By Others” shall be accomplished as in-kind by the Sponsor.

USubsidiary Items in Specifications UBid Item Subsidiary To & Spec.

Excavation, Common, Poll. Control-Silt Fence

Earthfill, Class C, Pollution Control - Silt Fence

Bid Item 4 – Const. Spec. 5

Bid Item 4 – Const. Spec. 5

Excavation, Common, Poll. Ctrl - Erosion Cont. Rock

Geotextile, Non-woven

Bid Item 5 – Const. Spec 5

Bid Item 5 – Const. Spec 5

Earth Backfill, Class C, Riser Base Installation Bid Item 16 – Const. Spec. 21

Geotextile, Non-Woven Bid Item 26 – Const. Spec. 45

Animal Guards Bid Item 27 – Const. Spec. 45

Excavation, Common, Corrugated Aluminum Pipe Drop Bid Item 28 – Const. Spec. 51

Earthfill, Class C, Corrugated Aluminum Pipe Drop Bid Item 28 – Const. Spec. 51

Drainfill, Fine, Corrugated Aluminum Pipe Drop Bid Item 28 – Const. Spec. 51

Concrete, Corrugated Aluminum Pipe Drop Bid Item 28 – Const. Spec. 51

Steel Reinforcement, Corrugated Aluminum Pipe Drop Bid Item 28 – Const. Spec. 51

Anti-vortex Baffle, Corrugated Aluminum Pipe Drop Bid Item 28 – Const. Spec. 51

Geotextile, Non-Woven Bid Item 28 – Const. Spec. 51

Rock Riprap, Corrugated Aluminum Pipe Drop Bid Item 28 – Const. Spec. 51

Subsidiary Items List Continued Marys Creek Dam No. 9 Rehabilitation Shelby County, Tennessee

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USubsidiary Items in Specifications UBid Item Subsidiary To & Spec.

Pipe Support, Corrugated Aluminum Pipe Drop Bid Item 28 – Const. Spec. 51

Geotextile, Non-Woven Bid Item 29 – Const. Spec. 61

Geotextile, Non-Woven

- By Others

Bid Item 30 – Const. Spec. 61

Concrete Modification, Slide Gate Assembly

- By Others

Bid Item 31 – Const. Spec. 71

Steel Reinforcement, Slide Gate Assembly

- By Others

Bid Item 31 – Const. Spec. 71

Structure Removal – Existing Riser Metalwork Bid Item 32 – Const. Spec. 81

Excavation, Common, Fence Anchor Bid Item 34 – Const. Spec. 91

Concrete, Fence Anchor Bid Item 34 – Const. Spec. 91

Earth Backfill, Class C, Temporary Pipe Culvert Bid Item 37 – Const. Spec. 435

Excavation, Common, Poll. Ctrl – Temp. Pipe Culvert Bid Item 37, – Const. Spec. 435

Pollution Control – Temporary Pipe Culvert Bid Item 37 – Const. Spec. 435

Construction Access Traffic Control Bid Item 37 – Const. Spec. 435

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

Construction Specification 2—Clearing and Grubbing

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

2. 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 cut, 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 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.

3. 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 6 feet above the ground surface.

4. 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 1 inch or larger shall be grubbed out to a depth of at least 2 feet below subgrade for concrete structures and 1 foot below the ground surface at embankment sites and other designated areas.

5. 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.

6. 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

(210-VI-NEH, May 2001) (2-2) will constitute full 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.

NRCS – 03/2018 (2-3)

TN - Mary’s Creek Dam No. 9 – Watershed Rehab

7. Items of work and construction details

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

a. UBid Item 1, Clearing and Grubbing.

(1) This item consists of the clearing and grubbing required to construct the works of improvement to the lines and grades as shown on the drawings. The work shall consist of removing and disposing of the trees, brush, stumps, roots, snags, logs, shrubs, leaves, vines, and rubbish within the clearing and grubbing limits shown on the drawings and marked in the field. The work shall also include the disposal of the existing piles of woody clearing debris shown on the drawings and marked in the field.

(2) Clearing and grubbing operations shall be completed prior to excavation and earthfill operations.

(3) Use of explosives is prohibited.

(4) In Section 2, Protection of existing vegetation, care shall be taken not to damage any tree that is not designated for removal. Trees designated for environmental preservation due to potential bat roosting habitat are marked for preservation and shall not be damaged or disturbed. Any vegetation and trees that are damaged that are outside of the clearing and grubbing limit lines shall be removed and disposed of UonlyU if concurred by the Engineer and only in the manner acceptable to the Engineer.

(5) In Section 3, Marking, The clearing and grubbing limit lines are shown on the drawings and marked in the field. Trees designated for preservation are marked in the field. Existing piles of woody clearing debris for disposal are marked in the field.

(6) In Section 4, Clearing and grubbing, the depth of grubbing shall be 1 foot below the ground surface after tree removal.

(7) Any material falling into any channel due to the Contractor’s operations shall be removed in a timely manner. No Contractor deposited material shall stay in the channel more than 24 hours without the approval of the Engineer.

(8) In Section 5, Disposal, the Contractor shall dispose of all woody materials generated by the clearing and grubbing operation and included in the existing woody debris piles. The Contractor shall have the option to either dispose of all debris off-site or by burning on-site in an open air pit. All materials transported off-site shall become the property of the Contractor and disposed of in compliance with local, state, and Federal laws and regulations. Any transportation costs and tipping fees associated with disposal shall be the responsibility of the Contractor.

NRCS – 03/2018 (2-4)

If the Contractor chooses to burn the debris on-site, then the disposal operation shall comply with all requirements contained in the latest edition of the Shelby County Code pertaining to open air burning. Contractor shall obtain all permits, pay all fees, provide all notifications, and any other requirement to lawfully burn on-site from all jurisdictions. Shelby County’s Standard Operating Procedure for issuance of an open burning permit rules and regulations are provided below for convenience as obtained in May 2016. Contractor shall be responsible for checking for and complying with any newer laws and regulations. No burning other than the specified method below will be allowed.

Any non-woody materials encountered or brought to the site by the Contractor or any Subcontractor shall be removed from the site and transported to a public landfill for disposal. The Contractor is responsible for all costs of disposal including transportation, tipping, and any other costs and fees.

(9) All excavation and required earthfill related to the burning pit disposal operation shall be considered incidental to and subsidiary to clearing and grubbing and will not be measured or paid separately. Burn pit earthfill necessary to close the pit shall be placed in lifts not more than 12 inch thick and shall be compacted by a minimum of two passes of the tracks of the construction equipment or by pounding of the track hoe bucket. Final compacted earthfill surface shall be 6 inches higher than the surrounding ground surface prior to placement of topsoil.

(10) Burn pits shall not be located within the footprint of any berm, embankment, auxiliary spillway, required excavation, required earthfill, drainage way, or in the flow path of the auxiliary spillway outlet.

(11) In Section 6, Measurement and Payment, Method 1 will apply. Clearing and grubbing area will be measured to the nearest 0.1 acre. Woody debris piles shall be included in the cleared area for payment and will not be otherwise measured for payment.

NRCS – 03/2018 (2-5)

USTANDARD OPERATING PROCEDURES FOR ISSUANCE OF AN OPEN

BURNING PERMIT IN SHELBY COUNTY

Open burning in Shelby County is prohibited. Exceptions can be granted under specific conditions which do not interfere with the maintenance of acceptable air quality or create a public nuisance.

The Health Department’s Air Pollution Control Section operates under Memphis City (16-50) or Shelby County (3-16) codes, and works in conjunction with local Fire Departments in issuing permits. At land clearing sites, temporary permits for the controlled burning of waste trees and brush can be issued. Burning this material is environmentally and economically preferred over disposal by landfilling.

The Fire Departments are concerned with preventing the spread of fire and potential fire hazards to nearby citizens. The Health Department is interested in minimizing the amount of smoke and fly ash released into the air which also impacts nearby residents.

I. PERMITS

a. To burn in Shelby County, Uoutside incorporated areasU, contact the Memphis & Shelby County Health Department at (901) 544-7349.

A minimum 24-hour advance notice is requested and only a Health Department permit is required. We will schedule a permit inspection time with the Shelby County Fire Department.

b. To burn Uinside the Memphis City LimitsU, two (2) permits are required. First, obtain a permit from the Memphis Fire Department at (901) 320-5401. The City of Memphis requires 48-hour advance notice to schedule a permit inspection and their fee is fifty dollars ($50.00) or seventy-five dollars ($75.00) for a 24-hour notice. Other incorporated areas of Shelby County may require an additional permit to be issued by their city fire department. Permits are currently required by the City of Collierville, twenty-five dollars ($25.00) and the City of Germantown, twenty-five dollars ($25.00).

Incorporated areas include: Arlington, Bartlett, Collierville, Germantown, Lakeland, and Millington. After obtaining the appropriate city permit, contact the Health Department at (901) 544- 7349 to schedule a permit inspection. Efforts are made to make this a joint Health and Fire Department inspection.

c. The Air Pollution Control’s Burning permit fee, for either the City or County, is one hundred dollars ($100.00) and is required at the time of permit issuance. Please make check or money order payable to “SHELBY COUNTY GOVERNMENT”. Cash may be accepted at the discretion of the inspector.

d. If you are uncertain about the jurisdiction of the area where you are planning to burn, contact the Health Department at (901) 544-7349.

Information regarding nearby streets, cross streets, direction, and

NRCS – 03/2018 (2-6)

distance will help determine the exact location of the burn site. If the location is remote and cannot be adequately identified or located on our maps, the clearing contractor will be asked to meet the inspector at a nearby location, such as an identified cross street, and the inspector will accompany the contractor to the site.

e. The Health Department permit is valid for thirty (30) days following the inspection. If weather conditions prohibit burning for a significant period during those thirty (30) days, a short extension may be granted, if requested, Ubefore the permit expiresU.

f. Only trees and brush from the burn site may be burned. Material may not be hauled in from other sites. Other materials including buildings, construction debris, furniture, plastic, tires, and roofing material Umust not be burnedU.

II. BURN PIT SPECIFICATIONS

a. The Air Curtain Destructor (blower) blows a sheet of air across the top of the pit to increase burning efficiency and reduce smoke and fly ash emissions. The air curtain’s nozzles are slanted so they impact about three (3) feet below the surface on the side opposite the blower. The air curtain does UnotU blow directly down into the fire.

In a properly operating pit, the air current rolls under and oxygenates the fire for more complete combustion (see Figure 1). The pit walls must be vertical (not sloped or slanted). The pit must be no more than twelve (12) feet wide because the air stream must reach the far side. A pit width of less than twelve (12) feet should be used for smaller air blowers.

b. The pit length is determined by the length of the air curtain plenum

(blower manifold). The plenum should be centered on the pit and the pit length can extend up to a maximum of five (5) feet beyond each end of the plenum.

c. The pit must be at least ten (10) feet deep. Pit depth is determined by available digging equipment and the water table. A pit cannot be permitted where groundwater is encountered during the construction.

Deeper pits usually burn better.

III. PROCEDURE FOR THE SCHEDULED INSPECTION DAY

a. Prior to the scheduled inspection, construct a pit according to the permit requirements. The pit must be partially filled with trees and brush. UDo not overfillU. An overfilled pit has material above the sheet of air which results in blockage of the air flow and excessive smoke emissions.

b. After the inspector approves the pit’s dimensions and position, diesel fuel may be used to ignite the contents. The equipment’s ability to control smoke is observed before the permit is issued.

NRCS – 03/2018 (2-7)

c. A Health Department permit fee is not required for pits that are not approved.

IV. PROCEDURE FOR DAYS YOU BURN

a. During the permit period, the jurisdictional Fire Department must be notified each day before burning begins and again when burning ends for the day. The Fire Department telephone number is written at the bottom of the permit.

Arlington Fire Department 867-8905 Bartlett Fire Department 385-5536 or 385-6412 Collierville Fire Department 853-3238 Germantown Fire Department 757-7269 Memphis Fire Department 320-5401 or 320-5422 Millington Fire Department 872-7851 Shelby County Fire Department 385-5100 Memphis & Shelby County Health Dept.

Air Pollution Control 544-7349 or 544-7775 National Weather Service 544-0399

b. Burning normally takes place during daylight hours for fire safety and to protect the workers charging the burn pit. Someone must be at the site to monitor the pit when burning is taking place.

Operation of the blower should continue until the fire has burned down completely and a fence or barrier should be placed completely around the pit or the pit completely filled and covered with dirt prior to leaving the site. A metal fence is required for the prevention of mishaps such as falling into unfilled pits. A wooden fence is unacceptable.

V. PROBLEMS SOMETIMES ENCOUNTERED WITH BURN PITS

a. A permit is issued for a particular pit. If a pit is moved, another inspection, permit, and fee are required for the new pit, even if both pits are on the same construction site.

b. A pit too long for the air curtain or wider than the permit specifications will have to be filled and replaced with another pit.

c. Burning must take place below the air curtain. Overfilled pits tend to smoke and release fly ash which are the most common citizen complaints.

d. Additional restrictions, such as limited burning hours and days or the presence of a water truck on-site may be imposed based on the site’s location and distance to the nearest water hydrant. Wind speed and direction limitations may also be imposed, either at the time the permit is issued or as a result of citizen complaints. Weather conditions are available from the Memphis Tennessee National

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Weather Service at 901-544-0399.

e. Occasionally, a permit cannot be issued because of the small size of the site or the site’s proximity to occupied residences, schools, nursing homes, hospitals, airports, or major roadways. The presence of overhanging trees or other flammable material may also prevent the issuance of a permit. No standing timber or overhead electrical lines are permitted within one hundred (100) feet of the burn pit.

f. Ideal locations for pits are at least:

1. Five hundred (500) feet away from any primary or secondary highway

2. One thousand (1,000) feet from any school or residence not on the same property as the pit, or

3. One half (1/2) mile from any airport, nursing home or hospital

g. Burning is to be conducted when ambient conditions ensure maximum dispersion of smoke. Burning should not be conducted during any declared air pollution episode in the area of the burn.

h. Permits are also occasionally revoked because of substantiated complaints regarding excessive smoke or fly ash due to improper burn pit operation. The Health Department is authorized to fine violators of permit conditions up to a maximum of twenty-five thousand dollars ($25,000) per violation.

i. Use of common sense will help avoid most of the problems and complaints associated with burn pit operation.

j. Please direct any questions to the Memphis & Shelby County Health Department, Air Pollution Control Section, Field Services Branch at

(901) 544-7349 or (901) 544-7775.

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

Construction Specification 3—Structure Removal

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

2. 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.

3. 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.

4. 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.

5. 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.

6. 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.

(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.

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.

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.

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TN – Mary’s Creek Dam No. 9 – Watershed Rehab

7. Items of work and construction details

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

Note: The Contractor is responsible for all Items of Work except those designated as “By Others.” Items of Work designated as “By Others” shall be accomplished as in-kind by the Sponsor.

a. UBid Item 2, Structure Removal - Existing Slide Gate Assembly and Concrete – UBy Others

(1) This item shall consist of the removal and disposal of the existing slide gate, frame, wall brackets, stem, stem guides, wedges, all fasteners, grout pad, and any other existing assembly item from the existing concrete riser unless otherwise allowed herein. This item shall also include all concrete and rebar demolition necessary to install the new wall thimble.

(2) All fastener holes located below the invert of the low stage inlet shall be plugged to not allow water into the interior of the riser during submergence. Method of plugging holes shall be approved by the Engineer. Plugging holes by re-installation of a bolt, nut and washers will be allowed provided the location will not interfere with installation of the new slide gate assembly. The integrity of any reinstalled fasteners shall be like new or they shall be replaced with new.

(3) In Section 2, Marking, Method 1 will apply.

(4) In Section 3, Removal, Method 1 will apply. Complete removal of the existing gate assembly is required except as allowed herein. The Contractor shall take extensive care to remove the existing gate assembly without damaging the concrete riser. Removal by acetylene torch or other cutting methods potentially damaging to the concrete shall be prohibited. The NRCS Engineer shall make the final determination of whether a method is capable of damaging the existing concrete. Removal of the existing grout pad shall be accomplished without damage to the existing riser. Removal of the existing riser concrete necessary to install the new wall thimble shall be accomplished without damaging the riser concrete to remain. Concrete demolition shall be kept to the minimum necessary to install the new thimble.

(5) In Section 4, Salvage, no parts of the assembly are designated for salvage or reuse except as allowed herein.

(6) In Section 5, Disposal of refuse materials, all materials removed from the riser and any old parts that have fallen from the riser shall become the property of the Contractor, removed off-site, and disposed of in compliance with local, state, and Federal laws and regulations. Any transportation costs and tipping fees associated with disposal shall be the responsibility of the Contractor.

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(7) In Section 6, Measurement and Payment, Method 2 will apply. In-kind credit consideration for the Sponsor will be in accordance with the executed Project Agreement and/or Memorandum of Understanding between NRCS and the Sponsor.

b. UBid Item 3, Structure Removal - Existing Dock

(1) This item shall consist of the removal and disposal of the existing wooden dock located on the upstream face of the embankment and east of the concrete riser.

(2) In Section 2, Marking, Method 1 will apply.

(3) In Section 3, Removal, Method 1 will apply. The entire wooden structure shall be removed including all embedded posts and any concrete around the posts. All fasteners and all structure debris shall be removed to the extent possible. Any excavation and required earthfill as a result of removing the existing dock posts shall be considered incidental and subsidiary to structure removal – existing dock and will not be measured or paid separately. All holes in the embankment shall be filled with Class A compacted earthfill as specified in Construction Specification 23, Earthfill.

(4) In Section 4, Salvage, no parts of the existing dock are designated for salvage.

(5) In Section 5, Disposal of refuse materials, all materials removed shall become the property of the Contractor, removed off-site, and disposed of in compliance with local, state, and Federal laws and regulations. All disposal costs such as transportation costs and tipping fees shall be the responsibility of the Contractor.

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

c. USubsidiary Item, Structure Removal – Existing Riser Metalwork

(1) This item shall consist of removal and off-site disposal of all existing structural steel angles, grates, straps, bars, bolts, nuts, washers and any item functioning as part of the trash rack systems around the low stage and high stage inlets on the existing concrete riser. Any trash and debris attached to or in the trash racks shall be removed and disposed of off-site. In addition, the low stage inlet shall be cleared of all debris to restore the opening free of obstructions to the original size.

(2) In Section 2, Marking, Neither method applies. All non-concrete items and materials around the low and high stage inlets are included except the metal manhole cover in the top of the riser slab shall remain in place.

(3) In Section 3, Removal, Method 1 will apply. All existing non-concrete items and materials around the low and high stage inlets shall be removed UexceptU the metal manhole cover in the top of the riser slab. Use of acetylene torches and other methods that will potentially damage the existing concrete shall be prohibited.

NRCS – 03/2018 3-5

The NRCS Engineer shall make the final determination of whether a method is capable of damaging the existing concrete.

In addition, the low stage opening shall have any and all debris removed from the opening to restore the wall opening to the original unobstructed size of 0.5 feet high by 2.5 feet wide. This debris removal shall occur prior to the installation of the new low stage inlet metalwork as required in Construction Specification 81.

(4) In Section 4, Salvage, no parts of the trash rack system are designated for salvage.

(5) In Section 5, Disposal of refuse materials, Woody debris in the trash racks may be disposed of on-site with other burnable materials if allowed by Shelby County or shall be disposed of off-site if such method is chosen by the Contractor.

Trash, all removed metalwork items, and all debris from the low stage opening shall become the Contractor’s property, removed off-site, and disposed of in compliance with local, state, and Federal laws and regulations. All disposal costs such as transportation costs and tipping fees shall be the responsibility of the Contractor.

(6) In Section 6, Measurement and payment, No separate payment will be made for Structure Removal – Existing Riser Metalwork. Compensation for Structure Removal – Existing Riser Metalwork will be included in the payment for Bid Item 32, Metalwork – Riser Inlets.

NRCS – 03/2018 3-6

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

Construction Specification 5—Pollution Control

1. 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 BioPreferred0T® 0Tproduct categories are applicable to this specification:

— mulch and compost materials

— erosion control materials

— fertilizers

— dust suppressants

— agricultural spray adjuvants

2. 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.

3. 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

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

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

4. 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.

5. 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.

6. 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.

7. 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

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

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.

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TN - Mary’s Creek Dam #9 – Watershed Rehab

8. Items of work and construction details are:

Note: The Contractor is responsible for all Items of Work except those designated as “By Others.” Items of Work designated as “By Others” shall be accomplished as in-kind by the Sponsor (Permit Holder).

a. UGeneral Stabilization

(1) In areas of the construction site where construction activities have either temporarily or permanently ceased, temporary or permanent stabilization measures, as appropriate, shall be completed not later than 14 calendar days after the construction activity in that portion of the site has temporarily or permanently ceased as required by the Storm Water Pollution Plan (SWPPP). Temporary and permanent seeding requirements shall be as specified in Construction Specification 6, Seeding, Sprigging, and Mulching.

(2) In the event that the applicable environmental permit(s), such as the TN Aquatic

Resources Alteration Permit (ARAP), has a more stringent timeframe for stabilization activities than stated above, the most stringent timeframe will apply.

(3) The Contractor shall review the previously prepared SWPPP, propose any changes if needed, and then sign the Notice of Intent (NOI) form as Contractor for the project. The Contractor shall install and maintain all erosion control activities in all disturbed areas from the start of construction until the completion of all construction activities.

(4) The Contractor will be responsible for installing and maintaining the erosion control measures as outlined in the SWPPP throughout the duration of the contract. The permit holder is responsible for the bi-weekly inspections (By Others) as required in the SWPPP. The permit holder will communicate with the Contractor directly if there are any issues with any aspects of the SWPPP that need to be addressed. The permit holder shall have the contract documents revised as necessary to ensure the adequate type and quantity of pollution control measures are available, properly implemented, and appropriate compensation is provided to the Contractor according to the contract requirements.

(5) In Section 6, Chemical pollution, a properly maintained sanitary facility is required to be on-site for the entire duration of the construction contract.

b. UBid Item 4, Pollution Control - Silt Fence

(1) This item consists of furnishing, installing, maintaining, repairing, re-installing, and removal and disposal of the geotextile silt fences to provide pollution control for all locations as shown on the Storm Water Pollution Prevention Plan (SWPPP) drawings and as staked in the field.

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(2) In Section 2, Material, the geotextile silt fence shall conform to the requirements of Material Specification 592, Geotextile, Table 592-3 for supported fence. The geotextile silt fence shall be of a type expressly manufactured for use as a silt fence and shall be equipped with top reinforcement and a six (6) inch flap at the bottom for burial. The fabric shall be firmly attached to the post by the manufacturer, or if attached in the field, it shall be done in accordance with the manufacturer’s recommendations. Wire ties through the geotextile which wrap or twist around the post shall not be used.

Posts shall be hardwood or steel and the fabric shall be attached to the post in accordance with the manufacturer’s recommendations. Posts shall extend above the top of the fabric and shall be driven into the ground at least twelve (12) inches below the bottom of the excavated trench where the fabric is buried. Wood posts shall be one and one-half by one and one-half (1 ½ X 1 ½) inch oak of the minimum length required for the specified fabric. Steel posts shall be of the type specifically manufactured for or recommended by the manufacturer of the silt fence.

The minimum fence height prior to burial shall be three (3) feet.

(3) In Section 3, Erosion and sediment control measures and works, silt fence installation may be accomplished by either trench or slicing construction as described in ASTM D6462. The chosen method shall result in adequate water impounding capability to allow proper silt fence function. If runoff water is not impounded behind the fence to allow settling and deposition of sediments and seepage of impounded water through the geotextile, the silt fence shall be re-installed properly.

(4) Silt fence locations are approximately located on the SWPPP construction drawings. Silt fence shall be installed at actual locations which will prevent unfiltered runoff from entering drainage ways or leaving the site; revisions to the SWPPP shall be made as necessary to insure adequate silt fence placement. All stockpiles of earthen materials shall have silt fence placed on the down gradient sides of the pile or at the work limits perimeter. Silt fence shall be installed on all down-gradient sides and work limits perimeter of all borrow areas. Permit holder shall ensure adequate quantity of silt fence is available in the contract as stated in Section 8.a.(4) above.

(5) In Section 6, Maintenance, removal, and restoration, the Contractor shall maintain the silt fence and periodically remove sediment so that the fence will temporarily retain water and function properly for the duration of construction.

Mandatory removal of sediment is required when the design capacity of the silt fence has been reduced by 50 percent. Upon completion of construction the accumulated sediment shall be excavated, spread within the work limits and permanently vegetated as specified in Construction Specification 6, Seeding, Sprigging, and Mulching. Upon completion of construction, silt fences shall become the property of the Contractor, shall be removed and disposed of off-site

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in a lawful manner. All disposal costs such as transportation costs and tipping fees shall be the responsibility of the Contractor.

The Engineer shall determine when installed and maintained silt fence has reached the end of its service life and a new installation is required.

(6) In Section 7, Measurement and Payment, Method 1 will apply. Silt Fence will be measured and paid to the nearest one (1.0) foot for properly installed, functioning and maintained silt fence. Contractor shall not exceed the contract quantity of placed silt fence unless the contract has been appropriately modified. Such payment will constitute full compensation for related Subsidiary Items:

Excavation, Common, Pollution Control - Silt Fence and Earthfill, Class C, Pollution Control - Silt Fence, as applicable.

c. UBid Item 5, Pollution Control - Erosion Control Rock

(1) This item consists of furnishing, installing, maintaining, repairing, and designated removal and disposal of all temporary erosion and sediment control practices and measures utilized by the Contractor that are constructed of limestone and/or rock riprap. See the Storm Water Pollution Prevention Plan (SWPPP) construction drawings for the approximate locations of the practices designated as rock check dams and construction exit.

(2) In Section 2, Material, rock for erosion control shall meet the material requirements of Rock Type 1 as described in Material Specification 523, Rock for Riprap, with the size as designated herein.

Erosion control rock for rock check dams shall have the same placement requirements as specified in Specification 61, Rock Riprap, including the geotextile. Erosion control rock for check dams shall comply with machine riprap TDOT Class A-1 having stone sizes from 2 to 15 inches in diameter with a DR50R of about 8 inches.

The filter stone on the upstream side of the rock check dams shall be clean and washed coarse aggregate limestone conforming to AASHTO M43, Coarse Aggregate, Size 57.

(3) In Section 3, Other, the temporary rock check dams and the construction exit(s) shall be installed as shown on the SWPPP drawings and as staked in the field.

Check dams shall reduce runoff velocity and trap sediment in permanent or temporary diversions, channels, waterways, around pipe inlets and outlets, at pump discharges, or other conveyances. Construction exit(s) located on the access road(s) shall remove sediments from tires prior to entering a public roadway. The actual installation locations of rock check dams and construction exit(s) shall be as approved by the Engineer.

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(4) A construction exit shall be constructed using clean and washed coarse aggregate limestone conforming to AASHTO M43, Coarse Aggregate, Size 1 or 2. The construction exit materials shall be placed and spread evenly to allow safe travel and effective sediment removal with no additional compaction required beyond that obtained during placement. For details of the rock check dam and construction exit, see the SWPPP construction drawings.

(5) Salvaging of topsoil shall be as specified in Construction Specification 26, Topsoiling.

(6) In Section 6, Maintenance, removal and restoration, the following will apply:

a. Rock check dams shall be inspected after each storm event. Repairs shall be made as necessary.