Okfuskee-West_Plans_Specifications.pdf

OKFUSKEE COUNRY EWP PROJECT 2015 - West

OKFUSKEE COUNTY

Specifications Index

Construction Specifications

064 Gabions 200E Mobilization and Demobilization 241E Geotextile 262E Rock Riprap Installed 264E Obstruction Removal

Material Specifications

263E Rock for Riprap 592 Geotextile

Construction Specification 64-Wire Mesh Gabions and Mattresses Twisted (Woven) or Welded Mesh

1. Scope The work consists of furnishing, assembling, and installing rock filled wire mesh gabion baskets and mattresses.

2. Types Gabions shall consist of rectangular wire mesh formed containers filled with rock. Gabions will conform to one of the following types:

Woven mesh-Nonraveling, double twisted, hexagonal wire mesh consisting of two wires twisted together in two 180-degree turns.

Welded mesh-Welded-wire mesh with a uniform square or rectangular pattern and a resistance weld at each intersection. The welded wire connections shall conform with the requirements of ASTM A 185, including wire smaller than W1.2 (0.124 in.), except that the welded connections shall have a minimum average shear strength of 70 percent and a minimum shear strength of 60 percent of the minimum ultimate tensile strength of the wire.

Gabions-Gabions shall be furnished as baskets or mattresses as specified in section 8. Baskets and mattresses shall be fabricated within a dimension tolerance of plus or minus 5 percent.

Baskets-Baskets are at least 12 inches high.

Mattresses-Mattresses are no more than 12 inches thick.

3. Material Gabions shall be fabricated, assembled, and installed in accordance with the nominal wire sizes and dimensions shown in tables 64-1 and 64-2, using the following materials unless otherwise specified in section 8.

Wire for fabrication and assembly shall be hot-dipped galvanized. The wire shall have a minimum tensile strength of 60,000 pounds per square inch. Galvanized steel wire shall conform to ASTM A 641, class 3, soft temper.

When epoxy or polyvinyl chloride (PVC) coated wire is specified in section 8, the galvanized wire shall be coated by fusion bonded epoxy; fusion bonded, extruded; or extruded and bonded PVC material. The wire coating shall be black, gray, green, or silvery, and the initial properties of the PVC coating shall meet the following requirements:

a. Specific gravity. In the range of 1.30 to 1.40, ASTM D 792.

b. Abrasion resistance. The percentage of weight loss shall be less than 12 percent when tested according to ASTM D 1242, method B, at 200 cycles, CSI-A abrader tape, 80 grit.

c. Brittleness temperature. Not higher than 15 øF, ASTM D 746.

d. Tensile strength. Extruded coating (not less than 2,980 lb/in2, ASTM D 412); fusion bonded coating (not less than 2,275 lb/in2, ASTM D 638).

e. Modulus of elasticity. Extruded coating (not less than 2,700 lb/in2 at 100 percent strain, ASTM D

412); fusion bonded coating (not less than 1,980 lb/in2 at 100 percent strain, ASTM D 638).

NRCS-OKLA 064-1 April 2015 Project Code 405139 Okfuskee County EWP

f. Ultraviolet light exposure. An exposure period of not less than 3,000 hours at 63 degrees centigrade, ASTM G 152.

g. Salt spray test. A test period of not less than 3,000 hours, ASTM B 117.

After the exposure to ultraviolet light and the salt spray test as specified above, the PVC coating shall not show cracks, blisters, splits, nor noticeable change of coloring (surface chalk). In addition, the specific gravity shall not change more than 6 percent, resistance to abrasion shall not change more than 10 percent, tensile strength shall not change more than 25 percent, and modulus of elasticity shall not change more than 25 percent from their initial values.

The wire sizes shown in tables 64-1 and 64-2 are the size of the wire after galvanizing and before coating with PVC.

Table 64-1 Minimum requirements*

Gabion baskets-height 12, 18, or 36 inches; length as specified

Type of wire Mesh size

Wire diameter

PVC

coating

Total diameter

Galvanized coating

(in) (in) (in) (in) (oz./ft2)

Woven mesh

3.25 x 4.5

0.118

None

0.118

0.80

3.25 x 4.5 0.105 0.02 0.145 0.80

Selvage 0.153 None 0.153 0.80

0.132 0.02 0.172 0.80

Lacing and internal 0.086 0.02 0.126 0.70 connecting wire

Welded 3 x 3 0.118 None 0.118 0.80 Mesh 3 x 3 0.105 0.02 0.145 0.80

Spiral binder 0.105 0.02 0.145 0.80

NRCS-OKLA 064-2 April 2015

Table 64-2 Minimum requirements*

Gabion mattresses-height 6, 9, or 12 inches; length as specified

Type of wire Mesh size

Wire diameter

PVC

coating

Total diameter

Galvanized coating

(in) (in) (in) (in) (oz./ft2)

Woven mesh

2.5 x 3.25

0.086

0.02

0.126

0.70

Selvage 0.105 0.02 0.145 0.80

Lacing and internal connecting wire

0.086 0.02 0.126 0.70

Welded mesh 1.5 x 3 0.080 0.02 0.120 0.70

Spiral binder 0.105 0.02 0.145 0.80 *Note: The wire sizes and PVC coating thickness shown are nominal sizes. The wire sizes include the galvanizing coating thickness.

Spiral binders are the standard fastener for welded-mesh gabion baskets and mattresses, and shall be formed from wire meeting the same quality and coating thickness requirements as specified for the gabion baskets and mattresses.

Alternate fasteners for use with wire mesh gabions, such as ring fasteners, shall be formed from wire meeting the same quality and coating thickness requirements as specified for the gabions and, as a minimum, shall conform to the manufacturer's recommendations.

Standard fasteners and alternate fasteners must provide a minimum strength of 1,400 pounds per lineal foot for gabion baskets and 900 pounds per lineal foot for gabion mattresses. When used to interconnect gabion baskets or mattresses with PVC coating, ring fasteners shall be made of stainless steel and spiral fasteners will be PVC coated. All fasteners shall meet all of the closing requirements of the gabion manufacturer in addition to any requirements specified in section 8.

Rock shall conform to the quality requirements in Material Specification 523, Rock for Riprap, unless otherwise specified in section 8. At least 85 percent of the rock particles, by weight, shall be within the predominant rock size range.

Gabion basket Predominant Minimum rock Maximum rock or mattress rock size dimension dimension height (in) (in) (in)

12-, 18-, or 36-inch basket

4 to 8

6-, 9-, or 12-inch mattress 3 to 6 3 6

At least 30 days before delivery to the site, the contractor shall inform the engineer in writing of the source from which the rock will be obtained. The test data and other information by which the material was determined by the contractor to meet the specification are included. The contractor shall provide the engineer free access to the source for the purpose of obtaining samples for testing and source approval.

Bedding or filter material, when specified, shall meet the gradation shown on the plans, or as specified in section 8, and the requirements of Material Specification 521, Aggregates for Drainfill and Filters. Geo-

NRCS-OKLA 064-3 April 2015 textile, when specified, shall conform to the requirements specified in section 8 and those of Material Specification 592.

4. Foundation preparation The foundation on which the gabions are to be placed shall be cut or filled and graded to the lines and grades shown on the drawings. Surface irregularities, loose material, vegetation, and all foreign matter shall be removed from the foundation. When fill is required, it shall consist of material conforming to the specified requirements. Gabions and bedding or specified geotextiles shall not be placed until the foundation preparation is completed and the subgrade surfaces have been inspected and approved by the

COTR.

Compaction of bedding or filter material is required as specified in section 8. The surface of the finished material shall be to grade and free of mounds, dips, or windrows. Geotextile shall be installed in accordance with the requirements of Construction Specification 95.

5. Assembly and placement Unless otherwise specified in section 8, the assembly and placement of gabions shall be in accordance with the following procedures:

Assembly-Rotate the gabion panels into position and join the vertical edges with fasteners for gabion assembly. Where lacing wire is used, wrap the wire with alternating single and double half-hitches at 4- to 5-inch intervals. Where spiral fasteners are used for welded-wire mesh, crimp the ends to secure the spirals in place. Where ring type alternate fasteners are used for basket assembly, install the fasteners at a maximum spacing of 6 inches. Use the same fastening procedures to install interior diaphragms where they are required.

Interior diaphragms are required where any inside dimension exceeds 3 feet. Diaphragms are installed to assure that no open intervals are present that exceed 3 feet.

Placement-Place the empty gabions on the foundation and interconnect the adjacent gabions along the top, bottom, and vertical edges using lacing wire. Wrap the wire with alternating single and double half-hitches at 4 to 6-inch intervals. Unless otherwise specified in section 8, lacing wire will be the only fastener allowed for interconnecting woven mesh gabions. Spiral fasteners are commonly used for the assembly and interconnection of welded mesh gabions. Spirals are screwed down at the connecting edges then each end of the spiral is crimped to secure it in place. Lacing may be used as needed to supplement the interconnection of welded mesh gabions and the closing of lids.

Interconnect each layer of gabions to the underlying layer of gabions along the front, back, and sides.

Stagger the vertical joints between the gabions of adjacent rows and layers by at least half of a cell length.

6. Filling operation After adjacent empty woven wire gabion units are set to line and grade and common sides properly connected, they shall be placed in straight line tension and stretched to remove any kinks from the mesh and to gain a uniform alignment. Welded-mesh gabions do not require stretching. The gabions may be staked to maintain the established proper alignment before the rock is placed. No stakes shall be placed through geotextile material. Connecting lacing wire and other fasteners (as allowed) shall be attached during the filling operation to preserve the strength and shape of the structure.

NRCS-OKLA 064-4 April 2015

Internal connecting crosstie wires shall be placed in each unrestrained gabion cell of more than 18 inches in height, including gabion cells left temporarily unrestrained. Two internal connecting wires shall be placed concurrently with rock placement at each 12-inch interval of depth. In woven mesh gabions these crossties are placed evenly spaced along the front face and connecting to the back face. All crosstie wires shall be looped around two mesh openings and each wire end shall be secured by a minimum of five 180-degree twists around itself after looping.

In welded mesh gabions these crossties or stiffeners are placed across the corners of the gabions (at 12 inches from the corners) providing diagonal bracing. Lacing wire or preformed hooked wire stiffeners may be used.

The gabions shall be carefully filled with rock by machine or hand methods to ensure alignment, avoid bulges, and provide a compact mass that minimizes voids. Machine placement requires supplementing with hand work to ensure the desired results. The cells in any row shall be filled in stages so that the depth of rock placed in any one cell does not exceed the depth of rock in any adjoining cell by more than 12 inches.

Along the exposed faces, the outer layer of stone shall be carefully placed and arranged by hand to ensure a neat, compact placement with a uniform appearance.

The last layer of rock shall be uniformly leveled to the top edges of the gabions. Lids shall be stretched tight over the rock filling using only approved lid closing tools as necessary. The use of crowbars or other single point leverage bars for lid closing is prohibited as they may damage the baskets. The lid shall be stretched until it meets the perimeter edges of the front and end panels. The gabion lid shall then be secured to the sides, ends, and diaphragms with spiral binders, approved alternate fasteners, or lacing wire wrapped with alternating single and double half-hitches in the mesh openings.

Any damage to the wire or coatings during assembly, placement, and filling shall be repaired promptly in accordance with the manufacturer's recommendations or replaced with undamaged gabion baskets.

7. Measurement and payment Method 1-For items of work for which specific unit prices are established in the contract, the volume of rock is measured within the neat lines of the gabion structure and computed to the nearest cubic yard.

Payment for gabions is made at the contract unit price and includes the wire mesh and rock. Such payment is considered full compensation for all labor, material, equipment, and all other items necessary and incidental to completion of the work.

Method 2-For items of work for which specific unit prices are established in the contract, the volume of the gabions is measured within the neat lines of the gabion structure and computed to the nearest cubic yard.

Payment for the gabions is made at the contract unit price and includes the wire mesh, rock, and specified bedding material or geotextile. Such payment is considered full compensation for all labor, material, equipment, 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, the surface area is measured within the neat lines of the gabion mattress structure and computed to the nearest square yard.

Payment for the gabion mattress is made at the contract unit price and includes the wire mesh and rock.

Such payment is considered full compensation for all labor, material, equipment, and all other items necessary and incidental to the completion of the work.

Method 4-For items of work for which specific unit prices are established in the contract, the surface area is measured within the neat lines of the gabion mattress structure and computed to the nearest square yard.

NRCS-OKLA 064-5 April 2015

Payment for the gabion mattress is made at the contract unit price and includes the wire mesh, rock, and specified bedding material or geotextile. Such payment is considered full compensation for all labor, material, equipment, 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. Unless otherwise specified in section 8, no deduction in volume is made for any void or embedded item. 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. Each item and the items to which they are made subsidiary are identified in section 8 of this specification.

NRCS-OKLA 064-6 April 2015

8. Items of work and construction details

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

a. Gabion Baskets, Rock Filled, Installed

(1) This item consists of delivery, assembly, installation, filling with rock, and lacing of the gabion baskets on 2 sites (Site #2, E1140Rd-Culvert and Site #6, N3600Rd-Hankins), as shown on the drawings.

(2) Also included in this item will be all earthwork required to prepare the bank slopes for placement of the gabions, as shown on the drawing.

(3) Dimensions of the Gabions shall be 3’ x 3’ x 12’.

(4) In Section 2, Gabion Type may be Woven Mesh or Welded Mesh. PVC coating is not required and lacing shall be as recommended by manufacturer

(5) Rock fill for gabions will meet the gradation specified in Section 3 of this specification. The Quality of the rock fill will meet that specified in Section 2 of Material Specification 263E - Rock for Riprap.

(6) No measurement and payment methods specified in Section 7 shall apply.

Instead, payment will be made for each Gabion installed and shall include delivery, assembly, installation, filling with rock, and lacing of the gabion baskets.

(7) Items of work subsidiary to this bid item are:

(a) Geotextile, Non-woven – Construction Specification 241

NRCS-OKLA 064-7 April 2015

NRCS-OKLA 200E-1 July 2010

CONSTRUCTION SPECIFICATION

200E. MOBILIZATION & DEMOBILIZATION

1. SCOPE

The work shall consist of the mobilization and demobilization of the contractor's forces and equipment necessary for performing the work required under the contract.

2. WORK ITEMS

Mobilization and demobilization shall consist of the following:

a. Transportation of personnel and equipment to and from the site.

b. Establishment and disassembly/removal of signage, storage facilities, sanitary facilities, utility service, and other necessary facilities at the site not covered in specific line items.

c. Other items as specified in Section 4 of this specification.

3. MEASUREMENT AND PAYMENT

For items of work for which specific lump sum prices are established in the contract, the quantity of mobilization will not be measured for payment.

Progress payments will be made only to the extent supported by invoice. If the total of such payments is less than the contract lump sum for mobilization, the unpaid balance will be included in the final contract payment. Total payment will be the lump sum contract price for mobilization, regardless of actual cost to the contractor.

Payment will not be made under this item for the purchase costs of materials having a residual value.

Payment of the lump sum contract price for mobilization will constitute full compensation for all labor, materials, equipment, and all other items necessary and incidental to completion of the work.

Compensation for any item of work described in the contract but not listed in the schedule of work 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 4 of this specification.

4. ITEMS OF WORK AND CONSTRUCTION DETAILS

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

a. Mobilization

(1) The work shall consist of the mobilization and demobilization of the contractor’s forces and equipment necessary for performing the work required under the contract.

(2) The entire job site shall be considered a hardhat area. All persons including operators inside an enclosed cab are required to wear a hardhat properly labeled with a minimum certification of ANSI Z89.1 1997 Class G or E Type I or II and less than five years old. Signs at least 3 feet by 4 feet in size with red letters at least 6 inches high and a white background shall be erected at all access points. The signs shall read “CONSTRUCTION AREA - HARDHATS REQUIRED BEYOND THIS POINT”. Variances to the exact signage requirements listed above may be approved by the Government.

(3) This item shall also include providing at least one employee available on each shift that is certified by the Mine Safety and Health Administration, American Red Cross, or other state-approved organization to administer emergency first aid and duly designated by the contractor to care for injured employees. The names of the certified employees shall be posted at the job site.

(4) This item shall also include providing one moisture-proof, dust-tight, 16-unit

American Red Cross approved first aid kit for every 25 employees. These first aid kits must be located in accessible, well-identified locations at the job site and be replenished as contents are used or become ineffective or outdated.

(5) This item shall also include providing a chemical toilet (port-a-potty) on each job site.

(6) This item shall also include providing 1 (one) cellular phone and accessories (chargers, external antenna, etc.) to the NRCS for their use in job related communications. Cellular phone service must be received in 90% of the work area. The phone will be returned to the contractor at the completion of the contract.

(7) To minimize the establishment of the Imported Fire Ant, Solenopsis invicta, Federal Regulation 7 CFR 301.81 and Oklahoma Administrative Rule OAC 35:30-13-3 have established a quarantine to regulate the movement of soil, hay or straw, plants with soil attached (including grass sod), and soil-moving equipment. All soil-moving equipment shall be properly washed and/or otherwise cleaned of all soil material before mobilizing to and demobilizing from the job site(s). Equipment cleaning is not required for site-to-site mobilization within a County on contracts which contain more than one job site. The movement of other regulated articles listed above may require an authenticated certificate or permit.

(8) The contractor shall be responsible for identifying the location of utilities prior to construction activities and shall notify the Oklahoma One-Call System at least

NRCS-OKLA 200E-2 April 2015

48 hours prior to starting work at the project site. If any unidentified utilities are encountered after work is initiated, the contractor shall discontinue work and notify the Government officer immediately.

(9) Construction activities shall be scheduled such that the Contractor will mobilize from site-to-site consecutively. Concurrent work on more than one site at a time will not be allowed.

(10) Payment will be made as the work proceeds, after presentation of paid invoices and/or documentation of direct costs by the Contractor showing specific mobilization and demobilization costs and supporting evidence of the charges of suppliers, subcontractors, and others. When the total of such payments is less than the lump sum contract, the balance remaining will be included in the final contract payment. Payment of the lump sum contract price for mobilization and demobilization will constitute full compensation for the completion of the work.

NRCS-OKLA 200E-3 April 2015

NRCS-1/06 241-1

OKLAHOMA

241. GEOTEXTILE

This work shall consist of furnishing all materials, equipment, and labor necessary for the installation of geotextiles.

2. QUALITY

Geotextiles shall conform to the requirements of Material Specification 592 and this specification.

3. STORAGE

Prior to use, the geotextile shall be stored in a clean dry place, out of direct sunlight, not subject to extremes of either hot or cold, and with the manufacturer’s protective cover in place.

4. SURFACE PREPARATION

The surface on which the geotextile is to be placed shall be graded to the neat lines and grades as shown on the drawings. The surface shall be reasonably smooth and free of loose rock and clods, holes, depressions, projections, muddy conditions and standing or flowing water (unless otherwise specified in Section 7).

5. PLACEMENT

Prior to placement of the geotextile, the soil surface will be inspected for quality assurance of design and construction. The geotextile shall be placed on the approved prepared surface at the locations and in accordance with the details shown on the drawings and specified. The geotextile shall be unrolled along the placement area and loosely laid (not stretched) in such a manner that it will conform to the surface irregularities when material is placed on or against it. The geotextile may be folded and overlapped to permit proper placement in the designated area.

The geotextile shall be joined by overlapping a minimum of 18 inches (unless otherwise specified), and secured against the underlying foundation material. Securing pins, approved and provided by the geotextile manufacturer, shall be placed along the edge of the panel or roll material to adequately hold it in place during installation. Pins shall be steel or fiberglass formed as a “U”, “L”, or “T” shape or contain “ears” to prevent total penetration. Steel washers shall be provided on all but the “U” shaped pins. The upstream or up-slope geotextile shall overlap the abutting down-slope geotextile. At vertical laps, securing pins shall be inserted through both layers along a line through approximately the midpoint of the overlap. At horizontal laps and across slope laps, securing pins shall be inserted through the bottom layer only. Securing pins shall be placed along a line approximately 2 inches in from the edge of the placed geotextile at intervals not to exceed 12 feet unless otherwise specified. Additional pins shall be installed as necessary and where appropriate to prevent any undue slippage or movement of the geotextile. The use of securing pins will be held to the minimum necessary. Pins are to be left in place unless otherwise specified.

NRCS-1/06 241-2

OKLAHOMA

Should the geotextile be torn or punctured, the damaged area shall be repaired with a patch of the same type of geotextile being used, overlaying the existing geotextile. The patch shall extend a minimum of 2 feet from the edge of any damaged area.

Geotextile shall be placed in accordance with the following applicable specification according to the use indicated in Section 7:

a. Slope Protection. The geotextile shall not be placed until it can be anchored and protected with the specified covering within 48 hours or protected from exposure to ultraviolet light. In no case shall material be dropped on uncovered geotextile from a height greater than 3 feet.

b. Subsurface Drains. The geotextile shall not be placed until drainfill or other material can be used to cover it within the same working day. Drainfill material shall be placed in a manner that prevents damage to the geotextile. In no case shall material be dropped on uncovered geotextile from a height greater than 5 feet.

6. MEASUREMENT AND PAYMENT

For items of work for which specific unit prices are established in the contract, the quantity of geotextile for each type placed within the specified limits will be determined to the nearest specified unit by measurements made of the covered surfaces only, disregarding that required for anchorage, seams, and overlaps. Payment will be made at the contract unit price. Such payment will constitute full compensation for the completion of the work.

7. ITEMS OF WORK AND CONSTRUCTION DETAILS

a. Subsidiary Item, Geotextile, Non-woven

(1) This item consists of furnishing and placing geotextile as designated on the drawings.

(2) Geotextile shall be non-woven, Class 1.

(3) Placement shall be between bedding and gabions

(4) No separate payment will be made for Geotextile, Non-woven.

Compensation for this item will be included in the payment for Gabions Baskets, Rock Filled, Installed for the appropriate site.

NRCS-OKLA 241E-3 April 2015

NRCS-OKLA 262E-1 June 2010

262E. ROCK RIPRAP INSTALLED

This work shall consist of furnishing and installing rock riprap as detailed in this specification and as shown on the drawings, including filter, bedding, or crushed rock as specified.

2. MATERIALS

Rock riprap, filter, bedding, and crushed rock materials shall conform to Material Specification 263E, Rock For Riprap.

3. SUBGRADE PREPARATION

The subgrade surfaces on which the rock riprap, filter, or bedding is to be placed shall be cut or filled and graded to the lines and grades shown on the drawings. When fill to subgrade is required, material shall be compacted in place to provide a firm surface for material placement.

Rock riprap, filter, or bedding shall not be placed until preparation for that area is completed and the subgrade surfaces have been inspected and approved.

4. EQUIPMENT PLACED ROCK RIPRAP

The rock riprap shall be placed by equipment on the surfaces and to the depths specified. The rock riprap shall be installed to the full course thickness in one operation and in such a manner as to avoid serious displacement of the underlying materials. The rock for riprap shall be delivered and placed in a manner that will ensure that the riprap in place shall be reasonably homogeneous with the larger rocks uniformly distributed and firmly in contact one to another with the smaller rocks and spalls filling the voids between the larger rocks.

Rock riprap shall be placed in a manner to prevent damage to structures. Hand placing will be required as necessary to prevent damage to any new and existing structures.

5. FILTER OR BEDDING

When the contract specifies filter or bedding beneath the rock riprap, the designated material shall be placed on the prepared subgrade surface as specified.

Compaction of filter or bedding aggregate will not be required, but the surface of such material shall be finished reasonably smooth and free of mounds, dips, or windrows.

NRCS-OKLA 262E-2 June 2010

6. CRUSHED ROCK

When the contract specifies crushed rock for the purpose of stabilizing wet foundation conditions, the Job Coordinator shall arrange for the placement of the material after consultation with the Government.

Compaction of the crushed rock will be with two complete passes of the equipment.

The surface of such material shall be finished reasonably smooth and free of mounds, dips, or windrows.

7. JOB COORDINATOR

The contractor shall provide a job coordinator to be available on each site at all times while work is in progress. The job coordinator shall coordinate the delivery and stockpile of materials, direct the contractor’s work operations, and coordinate activities with the Government and project sponsors. The job coordinator shall have a cellular telephone or other suitable method of communication at the job site to coordinate activities with the quarry, truckers, personnel, and emergency services, if needed. (If the contractor chooses to work on multiple sites concurrently, a job coordinator is required for each site.)

The job coordinator will NOT operate equipment.

8. MEASUREMENT AND PAYMENT

For items of work for which specific unit prices are established in the contract, the quantity of each type of rock riprap delivered and placed within the specified limits will be computed to the nearest 0.1 ton by actual weight. For each load of rock riprap placed as specified, the Contractor shall furnish to the Government a statement-of-delivery ticket showing the weight to at least the nearest 0.1 ton.

The quantity of each type of filter or bedding aggregate delivered and placed within the specified limits will be computed to the nearest 0.1 ton by actual weight. For each load of filter or bedding aggregate, the Contractor shall furnish to the Government a statement-of-delivery ticket showing the weight to at least the nearest

0.1 ton.

The quantity of crushed rock delivered and placed in accordance with this specification will be computed to the nearest 0.1 ton by actual weight. For each load of crushed rock, the Contractor shall furnish to the Government a statement-of-delivery ticket showing the weight to at least the nearest 0.1 ton.

For all materials - If delivery tickets show weight to the nearest 0.01 ton, the actual weights shown will be added together and rounded to the nearest 0.1 ton at the conclusion of the project.

NRCS-OKLA 262E-3 June 2010

Payment will be made at the contract unit price for each type of rock riprap, filter, bedding, or crushed rock. Such payment will be considered full compensation for completion of the work.

9. ITEMS OF WORK AND CONSTRUCTION DETAILS

Unloading of riprap or bedding materials from trailers via belly-dump mechanisms will not be allowed.

The Sponsor will provide one front-end loader (w/operator) to assist with rock placement and one dozer (w/operator) to assist with site smoothing, leveling, and stock pile control. The Job Coordinator will be required to coordinate contractor activities with the Sponsor to allow for efficient management of the project. No additional equitable adjustment in contract price or performance time will be allowed due to failure of contractor to effectively coordinate such activity. Use of the sponsor's equipment by the contractor is not allowed.

Items of work to be performed in conformance with this specification and the

a. Rock Riprap, Installed

(1) This item shall consist of furnishing and installing rock riprap to the required thickness; on the slopes; in the footings and in the keyways to the extent shown on the drawings and as described in this specification. Upstream and downstream cutoff trenches will be installed at locations and to the extents marked in the field by the Government. All excavation of keyway footings and cutoff trenches shall be included in this line item.

(2) Quantities in the schedule of work are estimates. The Job Coordinator shall coordinate activities with the Government to ensure that the proper quantity of riprap needed to complete the work is delivered to the site.

(3) The Job Coordinator will be responsible for taking weight delivery tickets and making copies available to the Government. The Job Coordinator will also keep daily totals and running totals of all rock riprap delivered to the site.

(4) Measurement and payment for rock riprap installed and meeting specifications will be to the nearest 0.1 ton based upon weight delivery tickets.

b. Riprap Bedding, Installed

(1) This item shall consist of furnishing and installing riprap bedding to the thickness and the extent shown on the drawings and as described in this specification. All cut and fill required to achieve the specified bank slope and prepare the subgrade for placement of rock as shown on the drawings shall be included in this line item.

NRCS-OKLA 262E-4 April 2015

(2) Bedding will be placed on the slope as shown as work proceeds and covered with rock riprap at the conclusion of each work day.

(3) Quantities in the schedule of work are estimates. The Job Coordinator shall coordinate activities with the Government to ensure that the proper quantity of riprap bedding needed to complete the work is delivered to the site.

(4) The Job Coordinator will be responsible for taking weight delivery tickets and making copies available to the Government. The Job Coordinator will also keep daily totals and running totals of riprap bedding delivered to the site.

(5) Measurement and payment for riprap bedding installed and meeting specifications will be to the nearest 0.1 ton based upon weight delivery tickets.

c. Crushed Rock, Installed

(1) This item shall consist of furnishing crushed rock to the site and dumping it as directed by the Engineer for the purpose of supporting the rock dumping area.

(2) Quantities in the bid schedule are estimated quantities. The Job Coordinator shall coordinate activities with the Contracting Officer’s Representative to ensure that the proper quantity of crushed rock needed to complete the work is delivered to the site. No crushed rock shall be delivered to the site until the Contracting Officers Representative verifies that foundation conditions warrant the use of such material.

(3) The Job Coordinator will be responsible for making delivery ticket copies available to the Government Inspector. The Job Coordinator will also keep a running total of crushed rock delivered to the site.

(4) Measurement and payment for crushed rock dumped on site shall be to the nearest 0.1 ton based upon weight delivery tickets.

NRCS-OKLA 262E-5 April 2015

NRCS-OKLA 264E-1 July 2010

264E. OBSTRUCTION REMOVAL

This work shall consist of the removal and disposal of damaged trees, brush, logs, snags, sediment, any foreign materials and other flow obstructions from within the banks of the designated channels.

Within this specification, the term Improved Property shall include homes, lawns, landscaped areas, parks, athletic fields, parking lots, businesses, streets, etc.

2. ACCESS

The Government shall designate access unless alternate routes are obtained by the Contractor and approved by the Government.

3. MARKING OF WORK LIMITS

Each end of each reach of stream and its tributaries designated for obstruction removal will be referenced to easily identified roads or other structures or landmarks or be marked by the Government by means of stakes, flags, or other suitable markers.

4. REMOVAL

Flow obstructions shall be removed by methods including, but not limited to, sawing, cabling, winching, lifting, or dragging. Excavation shall be limited to that necessary for sediment and stump removal.

The following guidelines will be used to determine which trees, stumps, and brush to remove. The Government will make the final determination.

a. All downed trees brush, limbs, tops, vines, and other washed-in woody vegetative materials lying completely or partially within the stream banks shall be removed.

b. Undermined or storm damaged trees within or outside the banks which are still standing but likely to fall into the stream shall be removed.

c. Stumps of downed or undermined trees within the channel banks shall be removed.

NRCS-OKLA 264E-2 July 2010

Sediment accumulations, which may reasonably be assumed to have resulted from the storm, shall be removed from within the defined channel.

All building materials, manufactured items, and other loose foreign debris lying completely or partially within the stream banks shall be removed.

5. DISPOSAL

All foreign debris such as building materials and manufactured items shall be hauled to an approved landfill unless alternate off-site disposal area(s) are obtained by the Contractor and approved by the Government.

Natural woody and other vegetative debris removed from the streams shall be burned and buried, or placed in windrows or debris piles as specified in Section 8.

Sediment removed from the watercourses shall be placed near the top of the channel bank and spread to a thickness not exceeding six (6) inches. No sediment shall be placed on improved property except where directed or allowed by the Government to fill stump holes, ruts, and other local depressions.

The Contractor shall obtain all permits necessary for burning debris. Residue from all burning operations shall be buried with a minimum depth of cover of one

(1) foot below normal ground elevation. Covered areas shall be graded to blend with the existing topography.

Debris shall not be placed in tributaries, side ditches, or other defined water entrances to the watercourse being cleaned.

6. SPECIAL REQUIREMENTS

Roadways constructed in the work areas shall be kept to the minimum necessary. No grading for equipment to work or benching of the valley sides will be permitted without the concurrence of the Government.

All saw cuts shall be made as close to ground level as the cutting tools will permit.

The Contractor shall take reasonable precautions to prevent further damage to the streams and its environment to include streambanks, fishery resources, and undamaged trees. The contractor shall provide tanks or barrels to be used for off-site disposal of chemical pollutants such as drained lubrication or transmission oils, greases, etc. produced as a by-product of this work. Washing, fueling, or servicing of equipment shall be avoided where spillage or wash water can enter the watercourse.

The Contractor shall not routinely operate heavy equipment such as crawler tractors and tracked backhoes within flowing streams.

NRCS-OKLA 264E-3 July 2010

The number of stream crossings shall be kept to a minimum. Materials used to form stream crossings shall be removed once the work for the subject reach is completed.

The Contractor shall backfill holes in the channels and channel banks resulting from stump removal in residential and other landscaped areas. Backfill shall be the best fill material available from within the channel area and within fifty (50) feet of the stump hole.

Fences which must be cut or removed for access shall be repaired or replaced by the Contractor at his expense to equal or exceed the quality of fencing that was in place prior to cutting or removal.

The Contractor shall take all reasonable precautions to prevent damage to structures, utilities, or other fixed improvements and shall promptly repair or replace any such improvements damaged by his operations.

7. MEASUREMENT AND PAYMENT

For items of work for which specific lump sum prices are established in the contract, payment for obstruction removal will be made at the contract lump sum price. Such payment shall constitute full compensation for all labor, equipment, tools and other items necessary and incidental to completion of the work.

Compensation for any item of work described in the contract but not listed in the schedule of work 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 8 of this specification.

8. ITEMS OF WORK AND CONSTRUCTION DETAILS

construction detail therefore are:

a. Debris Removal

(1) This item shall consist of all work, equipment and personnel required to remove all floatable material, concrete, metal, and miscellaneous debris within the channel and within all areas flagged in the field. The work performed in this line item will be done in cooperation with the Sponsor’s forces and equipment.

(2) Also included in this item is the felling and removal of trees that are either flagged for removal or within the designated stockpile areas and/or the work limits for placement of the rock.

(3) Debris shall be disposed of in the following manner:

a) All woody material will be removed from the necessary work areas identified above and stockpiled at areas designated for such. The Sponsor will be responsible for disposal of the woody debris.

b) Any materials removed from the site that contains materials of a hazardous nature, including household appliances (i.e. refrigerators), will be separated from the other materials by the Contractor and disposed of by the Sponsor.

(4) Items of work subsidiary to this line item are:

a) Deposition Removal – Construction Specification 264E

b. Subsidiary Item, Deposition Removal

(1) This item shall consist of the removal of all deposition and channel reconstruction as shown on the plans or marked in the field.

(2) Deposition shall be removed to the elevation of stream channel to blend with the existing bottom immediately upstream and downstream.

(3) Excavated streambank slopes shall be 2 to 1 or flatter.

(4) Excavated material shall be disposed of in areas adjacent to the stream channel.

(5) No separate payment will be made for Deposition Removal.

Compensation for this item will be included in the payment for Debris Removal for the appropriate site.

NRCS-OKLA 264E-4 April 2015

NRCS-OKLA 263E-1 June 2010

MATERIAL SPECIFICATION

263E. ROCK FOR RIPRAP

This specification covers the quality and gradation of rock and aggregate to be used on this project.

2. QUALITY

Individual rock fragments shall be dense, sound and free from cracks, seams and other defects conducive to accelerated weathering. The rock fragments shall be angular to subrounded in shape. The least dimension of an individual rock fragment shall be not less than one-third the greatest dimension of the fragment.(Less than 5% of the individual rocks larger than five pounds shall be flat or elongated to the extent that they will not meet this criteria.)

Loads that arrive on the job that appear to have a significant deviation from the specification, as determined by a cursory inspection by the Government, will be rejected and the supplier will remove the questionable material. If the material is unloaded on the site and the Government determines there is a significant deviation from the specification, the weight ticket will be noted as objectionable and can be handled one of two ways as determined by the supplier's Job Coordinator:

a. The supplier can reload the material and remove it from the job. No compensation will be made for the material.

b. The Government can note on the ticket that the material does not meet specifications, the reason it does not meet specifications in his opinion, and the weight of the questionable load will be reduced by 50%. The material will then be utilized in some form or fashion on the job.

The source of rock for riprap must be approved by the Government and material shall meet or exceed the criteria of NRCS Rock Type 3, which are detailed below:

Bulk specific gravity (saturated surface-dry basis)—Not less than 2.3 when tested in accordance with ASTM C 127 on samples prepared as described for soundness testing.

Absorption—Not more than 4 percent when tested in accordance with

ASTM C 127 on samples prepared as described for soundness testing.

NRCS-OKLA 263E-2 June 2010

Soundness—The weight loss in 5 cycles shall be not less than 20 percent when sodium sulfate is used or more than 25 percent when magnesium sulfate is used.

In lieu of the above criteria, rock sources which possess a current Oklahoma Department of Transportation Stone for Riprap certification may be accepted.

3. GRADATION

a. Riprap-Bedding Gradation - (Approximate)

Size % Passing 4" 100 2" 60-90

1" 40-70 #4 0-15

b. Riprap Gradation - (Approximate)

Riprap Max Max Avg Avg Not More than 20% Thickness Wt Size Wt Size Lighter Smaller (inches) (lbs) (in) (lbs) (in) Than Than

12 150 12 30-50 8-9 20 lbs. 6 in.

18 350 18 70-125 10-12 30 lbs. 8 in.

24 1000 24 225-400 15-18 40 lbs. 9 in.

30 1000 24 225-400 15-18 40 lbs. 9 in.

36 2000 30 450-800 19-23 80 lbs. 10 in.

c. Surge

Rock Material - Maximum Size - 6" <10% (by weight) smaller than 1/2"

d. Crushed Rock

1-1/2" Crusher Run

Chapter 3 National Standard Material Part 642 Specifications National Engineering Handbook

Material Specification 592—Geotextile

1. Scope This specification covers the quality of geotextile, including geotextile for temporary silt fence.

2. General requirements Fibers (threads and yarns) used in the manufacture of geotextile shall consist of synthetic polymers composed of a minimum of 85 percent by weight polypropylenes, polyesters, polyamides, polyethylene, polyolefins, or polyvinylidene-chlorides. They shall be formed into a stable network of filaments or yarns retaining dimensional stability relative to each other. The geotextile shall be free of defects, such as holes, tears, and abrasions. The geotextile shall be free of any chemical treatment or coating that significantly reduces its porosity. Fibers shall contain stabilizers, inhibitors, or both to enhance resistance to ultraviolet light. Geotextile other than for temporary silt fence shall conform to the requirements in tables 592–1 or 592–2, as applicable. Geotextile for temporary silt fence shall conform to the requirements in table 592–3.

Thread used for factory or field sewing shall be of contrasting color to the fabric and made of high strength polypropylene, polyester, or polyamide thread. Thread shall be as resistant to ultraviolet light as the geotextile being sewn.

3. Classification Geotextiles shall be classified based on the method used to place the threads or yarns forming the fabric. The geotextiles will be grouped into woven and nonwoven types. Geotextile for temporary silt fence may be either woven or nonwoven. Slit film woven geotextile may not be used except for temporary silt fence.

Woven—Fabrics formed by the uniform and regular interweaving of the threads or yarns in two directions.

Woven fabrics shall be manufactured from monofilament yarn formed into a uniform pattern with distinct and measurable openings, retaining their position relative to each other. The edges of fabric shall be selvedged or otherwise finished to prevent the outer yarn from unraveling.

Nonwoven—Fabrics formed by a random placement of threads in a mat and bonded by needle punching, heat-bonding, or resin-bonding. Nonwoven fabrics shall be manufactured from individual fibers formed into a random pattern with distinct, but variable small openings, retaining their position relative to each other when bonded by needle punching, heat-, or resin-bonding. The use of heat-or resin-bonded nonwovens is restricted as specified in note 2 of table 592–2.

4. Sampling and testing The geotextile shall meet the specified requirements (tables 592–1, 592–2, or 592-3, as applicable) for the product type shown on the label. Product properties as listed in the latest edition of the "Specifiers Guide," Geosynthetics, (Industrial Fabrics Association International, 1801 County Road B, West Roseville, MN 55113-4061 or at http://www.geosindex.com) and that represent minimum average roll values, are acceptable documentation that the product style meets the requirements of these specifications.

For products that do not appear in the above directory or do not have minimum average roll values listed, typical test data from the identified production run of the geotextile will be required for each of the specified tests (see table 592–1, 592–2, or 592-3, as applicable) as covered under clause AGAR 452.236-76.

5. Shipping and storage The geotextile shall be shipped and transported in rolls wrapped with a cover for protection from moisture, dust, dirt, debris, and ultraviolet light. The cover shall be maintained undisturbed to the maximum extend possible before placement.

Each roll of geotextile shall be labeled or tagged to clearly identify the brand, class, and the individual production run in accordance with ASTM D 4873.

Material Specification 592 Geotextile (continued)

(210-VI-NEH, January 2014) 592–2

Table 592–1 Requirements for woven geotextiles 1/

Property Test Method Units Class I Class II Class III Class IV Grab Tensile Strength ASTM D 4632 pounds

247 min. 180 min. 180 min. 315 min.

Elongation at Failure ASTM D 4632 percent

< 50 <50 <50 <50

Trapezoidal Tear Strength ASTM D 4533 pounds

90 min. 67 min. 67 min. 112 min.

Puncture Strength ASTM D 6241 pounds

495 min. 371 min. 371 min. 618 min.

Ultraviolet Stability (retained strength)

ASTM D 4355 percent

50 min. 50 min. 50 min. 50 min.

Permittivity ASTM D 4491 sec-1 as specified

Apparent Opening Size

(AOS) 2/

ASTM D 4751 mm as specified

Percent Open Area (POA) USACE

CWO-02215

percent as specified

1/ All values are minimum average roll values (MARV) in the weakest principal direction, unless otherwise noted.

2/ Maximum average roll value.

Note: CWO is a USACE reference.

Table 592–2 Requirements for nonwoven geotextiles 1/

Property Test Method Units Class I 2/ Class II 2/ Class III 2/ Class IV 2/ Grab Tensile Strength ASTM D 4632 pounds

202 min. 157 min. 112 min. 202 min.

Elongation at Failure ASTM D 4632 percent

Trapezoidal Tear Strength

ASTM D 4533 pounds

79 min. 56 min. 40 min. 79 min.

Puncture Strength ASTM D 6241…