20120124 66-4532-2-004 Specifications.pdf

Construction Specifications WRP Easement #: 66-4532-2-004

Date: 01/24/2012 Issue: ISSUED FOR CONSTRUCTION

Construction and Material Specifications

Project:

Jeannette Sears Wetland Reserve Project

Page i

Table of Contents

List of Construction Specifications ........................................................................................................................... v List of Material Specifications ................................................................................................................................... v Construction Specification 2—Clearing and Grubbing ..................................................................................... 2-1

1. Scope ............................................................................................................................................................ 2-1

2. Protection of Existing Vegetation ............................................................................................................. 2-1

3. Marking ....................................................................................................................................................... 2-1

4. Clearing and Grubbing .............................................................................................................................. 2-1

5. Disposal ....................................................................................................................................................... 2-1

6. Measurement and payment ...................................................................................................................... 2-1

7. Items of work and construction details ................................................................................................... 2-3

Construction Specification 5—Pollution Control ............................................................................................... 5-1

1. Scope ............................................................................................................................................................ 5-1

2. Material ........................................................................................................................................................ 5-1

3. Erosion and sediment control measures and works ............................................................................. 5-1

4. Chemical pollution ..................................................................................................................................... 5-2

5. Air pollution ............................................................................................................................................... 5-2

6. Maintenance, removal, and restoration .................................................................................................. 5-2

7. Measurement and payment ...................................................................................................................... 5-2

8. Items of work and construction details ................................................................................................... 5-3

Construction Specification 6—Seeding, Sprigging, and Mulching .................................................................. 6-1

1. Scope ............................................................................................................................................................ 6-1

2. Material ........................................................................................................................................................ 6-1

3. Seeding mixtures, sod, sprigs, and dates of planting ............................................................................ 6-2

4. Seedbed preparation and treatment ........................................................................................................ 6-2

5. Seeding, sprigging, fertilizing, mulching, and stabilizing .................................................................... 6-2

6. Measurement and payment ...................................................................................................................... 6-2

7. Items of work and construction details ................................................................................................... 6-3

Construction Specification 7—Construction Surveys ........................................................................................ 7-1

1. Scope ............................................................................................................................................................ 7-1

2. Equipment and material ............................................................................................................................ 7-1

3. Quality of work .......................................................................................................................................... 7-1

4. Primary control ........................................................................................................................................... 7-2

5. Construction surveys ................................................................................................................................. 7-2

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6. Staking ......................................................................................................................................................... 7-3

7. Records ........................................................................................................................................................ 7-3

8. Payment ....................................................................................................................................................... 7-3

9. Items of work and construction details ................................................................................................... 7-4

Construction Specification 8—Mobilization and Demobilization ................................................................... 8-1

1. Scope ............................................................................................................................................................ 8-1

2. Equipment and material ............................................................................................................................ 8-1

3. Payment ....................................................................................................................................................... 8-1

4. Items of work and construction details ................................................................................................... 8-1

Construction Specification 10—Water for Construction ................................................................................. 10-1

1. Scope .......................................................................................................................................................... 10-1

2. Facilities and equipment ......................................................................................................................... 10-1

3. Dust abatement and haul road maintenance........................................................................................ 10-1

4. Earthfill, drainfill, and rockfill ................................................................................................................ 10-1

5. Concrete, mortar, and grout ................................................................................................................... 10-1

6. Other construction requiring water ....................................................................................................... 10-1

7. Measurement and payment .................................................................................................................... 10-1

8. Items of work and construction details ................................................................................................. 10-2

Construction Specification 11—Removal of Water .......................................................................................... 11-1

1. Scope .......................................................................................................................................................... 11-1

2. Diverting surface water ........................................................................................................................... 11-1

3. Dewatering the construction site ........................................................................................................... 11-1

4. Dewatering borrow areas ........................................................................................................................ 11-1

5. Erosion and pollution control ................................................................................................................. 11-2

6. Removal of temporary works ................................................................................................................. 11-2

7. Measurement and payment .................................................................................................................... 11-2

8. Items of work and construction details ................................................................................................. 11-3

Construction Specification 21—Excavation ...................................................................................................... 21-1

1. Scope .......................................................................................................................................................... 21-1

2. Classification ............................................................................................................................................. 21-1

3. Blasting ...................................................................................................................................................... 21-1

4. Use of excavated material ....................................................................................................................... 21-2

5. Disposal of waste materials .................................................................................................................... 21-2

6. Excavation limits ...................................................................................................................................... 21-2

7. Borrow excavation ................................................................................................................................... 21-2

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8. Overexcavation ......................................................................................................................................... 21-2

9. Measurement and payment .................................................................................................................... 21-3

10. Items of work and construction details ................................................................................................. 21-4

Construction Specification 23—Earthfill ........................................................................................................... 23-1

1. Scope .......................................................................................................................................................... 23-1

2. Material ...................................................................................................................................................... 23-1

3. Foundation preparation .......................................................................................................................... 23-1

4. Placement .................................................................................................................................................. 23-2

5. Control of moisture content .................................................................................................................... 23-2

6. Compaction ............................................................................................................................................... 23-3

7. Reworking or removal and replacement of defective earthfill .......................................................... 23-4

8. Testing ....................................................................................................................................................... 23-4

9. Measurement and payment .................................................................................................................... 23-5

10. Items of work and construction details ................................................................................................. 23-6

Construction Specification 44—Corrugated Polyethylene Pipe ..................................................................... 44-1

1. Scope .......................................................................................................................................................... 44-1

2. Material ...................................................................................................................................................... 44-1

3. Handling and storage .............................................................................................................................. 44-1

4. Excavation ................................................................................................................................................. 44-1

5. Preparing the pipe bed and blinding the pipe ..................................................................................... 44-2

6. Placement and joint connections ............................................................................................................ 44-2

7. Backfilling .................................................................................................................................................. 44-2

8. Measurement and payment .................................................................................................................... 44-2

9. Items of work and construction details ................................................................................................. 44-3

Construction Specification 95—Geotextile ........................................................................................................ 95-1

1. Scope .......................................................................................................................................................... 95-1

2. Quality ....................................................................................................................................................... 95-1

3. Storage ....................................................................................................................................................... 95-1

4. Surface preparation .................................................................................................................................. 95-1

5. Placement .................................................................................................................................................. 95-1

6. Measurement and payment .................................................................................................................... 95-2

7. Items of work and construction details ................................................................................................. 95-3

Construction Specification 401—Precast Concrete Structures ..................................................................... 401-1

1. Scope ........................................................................................................................................................ 401-1

2. Materials .................................................................................................................................................. 401-1

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3. Construction Methods ........................................................................................................................... 401-4

4. Plan Requirements ................................................................................................................................. 401-4

5. Items of Work and construction details. ............................................................................................. 401-5

Material Specification 522—Aggregates for Portland Cement Concrete ..................................................... 522-1

1. Scope ......................................................................................................................................................... 522-1

2. Quality ...................................................................................................................................................... 522-1

3. Reactivity with Alkalies ......................................................................................................................... 522-1

4. Storing and Handling ............................................................................................................................. 522-1

Material Specification 531—Portland Cement ................................................................................................. 531-1

1. Scope ........................................................................................................................................................ 531-1

2. Quality ...................................................................................................................................................... 531-1

3. Storage at the Construction Site ............................................................................................................ 531-1

Material Specification 532—Supplementary Cementitous Materials ........................................................... 532-1

1. Scope ......................................................................................................................................................... 532-1

2. Quality ...................................................................................................................................................... 532-1

Material Specification 592—Geotextile ............................................................................................................. 592-1

1. Scope ......................................................................................................................................................... 592-1

2. General Requirements ............................................................................................................................ 592-1

3. Classification ............................................................................................................................................ 592-1

4. Sampling and Testing ............................................................................................................................. 592-1

5. Shipping and Storage.............................................................................................................................. 592-2

Material Specification 593—Lime ...................................................................................................................... 593-1

1. Scope ......................................................................................................................................................... 593-1

2. Quality ...................................................................................................................................................... 593-1

Page: v

List of Construction Specifications

• 002 Clearing and Grubbing

• 005 Pollution Control

• 006 Seeding, Sprigging, and Mulching

• 007 Construction Surveys

• 008 Mobilization and Demobilization

• 010 Water for Construction

• 011 Removal of Water

• 021 Excavation

• 021 Earthfill

• 044 Corrugated Polyethylene Pipe

• 095 Geotextile

• 401 Precast Concrete Structure

List of Material Specifications

• 522 Aggregates for Portland Cement Concrete

• 531 Portland Cement

• 532 Supplementary Cementious Materials

• 592 Geotextile

• 593 Lime

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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 cuts, skins, scrape, 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 will constitute full

Page 2-2 of 2-4 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 86

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.

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7. Items of work and construction details

A. Subsidiary to Bid Line Items #3 and #4; Clearing and Grubbing necessary for Installing Earthfill

Dikes #1 and #2 respectively.

1) This item shall consist of clearing and grubbing the dikes, core trench, and borrow areas as identified on the construction drawings.

2) All stumps, roots, root clusters, and/or vegetation which has a diameter equal to or greater than 1 inch, shall be grubbed out to a minimum depth of one (1) foot below the existing ground; for grubbing outside of the core trench. All stumps, roots, root clusters, and/or vegetation which has a diameter equal to or greater than 1 inch, shall be grubbed out to a minimum depth of one (1) foot below the proposed elevation of the core trench; this may include but is not limited to bottom and side slopes.

3) All material removed from clearing and grubbing activities shall be disposed of in designated areas as shown on the construction drawings.

4) No separate payment shall be made for Clearing and Grubbing of Dikes #1 and #2.

Compensation for this item shall be included in the payment for Bid Line Items #3 and #4.

B. Subsidiary to Bid Line Item #5; Clearing and Grubbing necessary for Installing Roadway Improvements.

1) This item shall consist of clearing and grubbing the roadway, ditch banks, and borrow areas as identified on the construction drawings.

2) All stumps, roots, root clusters, and/or vegetation which has a diameter equal to or greater than 1 inch, shall be grubbed out to a minimum depth of one (1) foot below the existing ground; for grubbing outside of the core trench. All stumps, roots, root clusters, and/or vegetation which has a diameter equal to or greater than 1 inch, shall be grubbed out to a minimum depth of one (1) foot below the proposed elevation of the core trench; this may include but is not limited to bottom and side slopes.

3) All material removed from clearing and grubbing activities shall be disposed of in designated areas as shown on the construction drawings.

4) No separate payment shall be made for Clearing and Grubbing of Roadway Improvements.

Compensation for this item shall be included in the payment for Bid Line Items #5.

C. Subsidiary to Bid Line Items #6 through #11; Clearing necessary for Installing Sloughes #1 through

#6 respectively.

1) This item shall consist of clearing required to construct the sloughes as shown on the construction drawings.

Page 2-4 of 2-4

2) No grubbing shall be performed as part of the slough construction activities.

3) All material removed from clearing activities shall be disposed of in designated areas as shown on the construction drawings.

4) No separate payment shall be made for Clearing and Grubbing of Sloughes #1 through #6.

Compensation for this item shall be included in the payment for Bid Line Items #6 through #11.

D. Subsidiary to Bid Line Items # 12 and 13; Clearing and Grubbing necessary for Furnishing and Installing Water Control Structures #1 and #2 respectively.

1) This item shall consist of clearing and grubbing required to install water control structures as shown on the construction drawings.

2) All stumps, roots, root clusters, unsuitable soil, and/or vegetation which has a diameter equal to or greater than 1 inch, shall be grubbed out to a minimum depth of two (2) foot below the proposed sub-grade elevation of the water control structures; this may include but is not limited to bottom, side slopes, and barrel alignment.

3) All material removed from clearing and grubbing activities shall be disposed of in designated areas as shown on the construction drawings.

4) No separate payment shall be made for Clearing and Grubbing of Water Control Structures

#1 and #2. Compensation for this item shall be included in the payment for Bid Line Items #12 and #13.

E. Subsidiary to Bid Line Item #14; Clearing and Grubbing necessary for Furnishing and Installing 24

Inch Diameter HDPE Pipe.

1) This item shall consist of clearing and grubbing required to install HDPE pipe as shown on the construction drawings.

2) All stumps, roots, root clusters, unsuitable soil, and/or vegetation which has a diameter equal to or greater than 1 inch, shall be grubbed out to a minimum depth of two (2) foot below the proposed sub-grade elevation of the HDPE pipe; this may include but is not limited to bottom, side slopes, and barrel alignment.

3) All material removed from clearing and grubbing activities shall be disposed of in designated areas as shown on the construction drawings.

No separate payment shall be made for Clearing and Grubbing of HDPE Pipe. Compensation for this item shall be included in the payment for Bid Line Item #14.

Page 5-1 of 5-6

Construction Specification 5—Pollution Control

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.

2. Material All 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 sediment fences trap sediment from areas of limited runoff. Sediment filters shall be properly anchored to prevent erosion under or around them. 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.

Page 5-2 of 5-6

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 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

Page 5-3 of 5-6 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.

8. Items of work and construction details

A. Subsidiary to Bid Line Items #3 through #16.

1) This item shall consist of the installation of all measures to control pollution and “sediment and erosion control” including disposal of chemical pollutants, air pollutions, etc. which shall be disposed of by the contractor in accordance with local, state, and federal guidelines.

2) Contractor shall provide water tight containers for disposing of chemical pollutants, and shall notify proper agency and the Contract Officers Technical Representative immediately after discovering a spill. Contractor shall be responsible for clean up and any remediation required, at their own expense.

3) Seeding of disturbed areas shall be performed as specified in Construction Specification #6, within this specification package.

4) No separate payment shall be made for Pollution Control. Compensation for this item shall be included in the payment for Bid Line Items #3 through #16.

B. Bid Line Item #1, Furnish, Install, and Remove Silt Fence.

1) This item shall consist of the furnishing, installation, maintain, and removing temporary silt fencing (from here on known as “Silt Fence”). The silt fence shall be installed prior to any disturbing activities. Maintain the silt fence until the project is accepted or until the fence is removed. Remove and replace deteriorated or ineffective filter fabric. Remove and dispose of silt accumulations (>0.25 feet measured from average ground to apex of accumulation) in appropriate disposal areas as shown on construction drawings when necessary or as directed. Leave silt fence in place until site stabilization and remove at project completion.

Removed silt fence becomes the property of the Contractor. Dress and seed and mulch all areas where silt fence is removed in accordance with Construction Specification 6.

2) Materials

Page 5-4 of 5-6

a. Posts

i. Steel Post meeting the following requirements: Minimum 5 feet long, minimum 1 3/8 inches wide measured parallel to the fence, minimum weight of 1.25 lbs/ft of length, equipped with an anchor plate with a minimum area of 14.0 square inches, and having a means of retaining fabric in the desired position without displacement.

b. Filter Fabric

i. The fabric shall consist of strong rot-proof synthetic fibers formed into a woven fabric or a non-woven needle-punched fabric meeting all applicable requirements of this section.

The fabric shall be free from any treatment or coating that might significantly alter its physical properties before or after installation. The fabric fibers shall contain stabilizers and/or inhibitors to make the filaments resistant to deterioration resulting from ultraviolet or heat exposure. The fabric shall be a pervious sheet of synthetic fibers oriented into a stable network so that the fibers retain their relative position with respect to each other. Finish the edge of the fabric to prevent the outer fibers from pulling away from the fabric.

The fabric shall be free of defects or flaws which significantly affect its physical and/or filtering properties. Sheets of fabric may be bonded together or sewn with a fungus resistant material. Do not use nylon thread for sewn seams. No deviation from any physical requirements will be permitted due to the presence of the seam.

During all periods of shipment and storage, wrap the fabric in a heavy duty protective covering to protect the fabric from direct sunlight, mud, dust, dirt, and debris. Do not expose the fabric to temperatures greater than 140°F.

ii. Physical Properties:

Grab Tensile Strength: 50 lbs Elongation: 30 % max Puncture Strength: 30 lbs.

Apparent Opening Size: #30 sieve Ultraviolet Exposure Strength Retention (at 500 hrs): 70 % Permittivity: 0.15 sec-1 Exhibit no fungal growth as tested by ASTM G21 All minimum strength requirements are minimum average roll values in the weakest principal direction.

c. Attachment Device:

i. Provide wire, zip tie, or other approved attachment device with a minimum tensile strength of 50 pounds (lbs.).

3) Install in accordance with construction drawings.

4) Maintenance

Page 5-5 of 5-6

a. Inspect silt fences at least once a week and after each rainfall. Make any required repairs immediately and report to Inspector and/or COTR.

b. Should the silt fence collapse, tear, decompose, or become ineffective replace it immediately.

c. Remove sediment deposits upon accumulating greater than or equal to 0.25 feet as measured from average ground to the apex of accumulation, or at the direction of Inspector/COTR. Take care to avoid undermining the fence during the cleanout.

d. Remove all fencing material and unstable sediment deposits and bring the area to grade and stabilize upon request and approval of the site being deemed stable by the COTR/Engineer.

5) Measurement and payment shall be Method 1, as outlined in Section 7 of this specification.

6) Payment for Silt Fence shall be paid under Bid Item #1. Compensation for this item shall be made on a per linear foot (LF) basis.

C. Bid Line Item #2, Furnish, Install, and Remove Turbidity Curtain.

1) This item shall consist of the furnishing, installation, maintain, and removing temporary turbidity curtain (from here on known as “Turbidity Curtain”). The turbidity curtains shall be installed prior to any disturbing activities. Maintain the turbidity curtain until the project is accepted or until it’s removed. Remove and replace deteriorated or ineffective turbidity curtain floats, screen, buoys, or ineffective equipment. Maintain and install in accordance with manufactures specifications. Remove and dispose of silt accumulations in appropriate disposal areas as shown on construction drawings when necessary or as directed. Leave turbidity curtain in place until site stabilization and remove at project completion. Removed turbidity curtains become the property of the Contractor. Contractor shall submit to the engineer a detailed diagram of installation guide, material specifications, and maintenance recommendations from the manufacture two (2) weeks prior to any disturbing activities and/or installation of turbidity curtain.

2) Materials

a. Floatation: Eight (8) inch floatation constructed of expanded polystyrene (“logs”) placed end to end in the top fabric pocket with separations between logs.

b. Top Tension: Steel Cable (9,800 lb breaking strength); contained in polyethylene tubes or galvanized; one above and one below the float.

c. Bottom Tension: A galvanized chain (7,600 lb breaking strength); 0.93 lb/ft weight.

d. Screen Fabric:

Base Fabric: 6.0 oz/yd2 Woven Polyester

Page 5-6 of 5-6

Coated Fabric Weight: 22 oz/yd2 Type of Coating: PVC Coating Distribution: 60/40 Tensile Strength

Grab Warp: 500 lbs Fill: 450 lbs

Tear Strength Tongue Wrap: 110 lbs Fill: 110 lbs

Puncture Screwdriver: 100 lbs Ball: 400 lbs

3) Install according to manufactures recommendations.

4) Measurement and payment shall be Method 1, as outlined in Section 7 of this specification.

5) Payment for Turbidity Curtain shall be paid under Bid Item #2. Compensation for this item shall be made on a per each (EA) basis.

Page 6-1 of 6-6

Construction Specification 6—Seeding, Sprigging, and Mulching

The work consists of preparing the area for treatment; furnishing and placing seed, sprigs, mulch, fertilizer, inoculant, lime, and other soil amendments; and anchoring mulch in designated areas as specified.

2. Material Seed—All seed shall conform to the current rules and regulations of the state where it is being used and shall be from the latest crop available. It shall meet or exceed the standard for purity and germination listed in section 7.

Seed shall be labeled in accordance with the state laws and the U.S. Department of Agriculture rules and regulations under the Federal Seed Act in effect on the date of invitations for bids. Bag tag figures are evidence of purity and germination. No seed will be accepted with a test date of more than 9 months before the delivery date to the site.

Seed that has become wet, moldy, or otherwise damaged in transit or storage will not be accepted. The percent of noxious weed seed allowable shall be as defined in the current State laws relating to agricultural seeds. Each type of seed shall be delivered in separate sealed containers and fully tagged unless exception is granted in writing by the contracting officer.

Fertilizer—Unless otherwise specified, the fertilizer shall be a commercial grade fertilizer. It shall meet the standard for grade and quality specified by State law. Where fertilizer is furnished from bulk storage, the contractor shall furnish a supplier's certification of analysis and weight. When required by the contract, a representative sample of the fertilizer shall be furnished to the contracting officer for chemical analysis.

Inoculants—The inoculant for treating legume seeds shall be a pure culture of nitrogen-fixing bacteria prepared specifically for the species and shall not be used later than the date indicated on the container or as otherwise specified. A mixing medium, as recommended by the manufacturer, shall be used to bond the inoculant to the seed. Two times the amount of the inoculant recommended by the manufacturer shall be used except four times the amount shall be used when seed is applied using a hydraulic seeder. Seed shall be sown within 24 hours of treatment and shall not remain in the hydraulic seeder longer than 4 hours.

Lime and other soil amendments—Lime shall consist of standard ground agriculture limestone, or approved equivalent. Standard ground agriculture limestone is defined as ground limestone meeting current requirements of the State Department of Agriculture. Other soil amendments shall meet quality criteria and application requirements specified in section 7.

Mulch tackifiers—Asphalt emulsion tackifiers shall conform to the requirements of ASTM D 977, Specification for Emulsified Asphalt. The emulsified asphalt may be rapid setting, medium setting, or slow setting. Nonasphaltic tackifiers required because of environmental considerations shall be as specified in section 7.

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Straw mulch material—Straw mulch shall consist of wheat, barley, oat or rye straw, hay, grass cut from native grasses, or other plants as specified in section 7. The mulch material shall be air-dry, reasonably light in color, and shall not be musty, moldy, caked, or otherwise of low quality. The use of mulch that contains noxious weeds is not permitted. The contractor shall provide a method satisfactory to the contracting officer for determining weight of mulch furnished.

Other mulch materials—Mulching materials, such as wood cellulose fiber mulch, mulch tackifiers, synthetic fiber mulch, netting, and mesh, are other mulching materials that may be required for specialized locations and conditions. These materials, when specified, must be accompanied by the manufacturer's recommendations for methods of application.

3. Seeding mixtures, sod, sprigs, and dates of planting The application rate per acre for seed mixtures, sprigs, or sod and date of seeding or planting shall be as shown on the plans or as specified in section 7.

4. Seedbed preparation and treatment Areas to be treated shall be dressed to a smooth, firm surface. On sites where equipment can operate on slopes safely, the seedbed shall be adequately loosened (4 to 6 inches deep) and smoothed. Depending on soil and moisture conditions, disking or cultipacking, or both, may be necessary to properly prepare a seedbed. Where equipment cannot operate safely, the seedbed shall be prepared by hand methods by scarifying to provide a roughened soil surface so that broadcast seed will remain in place.

If seeding is to be accomplished immediately following construction operations, seedbed preparation may not be required except on a compacted, polished, or freshly cut soil surface.

Rocks larger than 6 inches in diameter, trash, weeds, and other debris that will interfere with seeding or maintenance operations shall be removed or disposed of as specified in section 7.

Seedbed preparation shall be discontinued when soil moisture conditions are not suitable for the preparation of a satisfactory seedbed as determined by the contracting officer's technical representative

(COTR).

5. Seeding, sprigging, fertilizing, mulching, and stabilizing All seeding or sprigging operations…