S01 12FPC322Q0013 Attachment 1 - Specifications.pdf

EDDIE WARE BRIDGE ABUTMENT STABILIZATION

PAYNE COUNTY

JUNE 2021 FLOODING

Specifications Index

Construction Specifications

8 Mobilization and Demobilization 61 Rock Riprap 264E Obstruction Removal

Material Specifications

523 Rock for Riprap 521 Aggregates for Drainfill and Filters

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(210-VI-NEH, May 2001)

Construction Specification 8—Mobilization and Demobilization

1. Scope The work consists of the mobilization and demobilization of the contractor's forces and equipment nec-essary for performing the work required under the contract. It does not include mobilization and demo-bilization for specific items of work for which payment is provided elsewhere in the contract. Mobiliza-tion will not be considered as work in fulfilling the contract requirements for commencement of work.

2. Equipment and material Mobilization shall include all activities and associated costs for transportation of contractor's personnel, equipment, and operating supplies to the site; establishment of offices, buildings, and other necessary general facilities for the contractor's operations at the site; premiums paid for performance and payment bonds including coinsurance and reinsurance agreements as applicable; and other items specified in section 4 of this specification.

Demobilization shall include all activities and costs for transportation of personnel, equipment, and supplies not required or included in the contract from the site; including the disassembly, removal, and site cleanup of offices, buildings, and other facilities assembled on the site specifically for this contract.

This work includes mobilization and demobilization required by the contract at the time of award. If additional mobilization and demobilization activities and costs are required during the performance of the contract as a result of changed, deleted, or added items of work for which the contractor is entitled to an adjustment in contract price, compensation for such costs will be included in the price adjustment for the item or items of work changed or added.

3. Payment Payment will be made as the work proceeds, after presentation of paid invoices 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 price, 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 compen-sation for completion of the work.

Payment will not be made under this item for the purchase costs of materials having a residual value, the purchase costs of materials to be incorporated in the project, or the purchase costs of operating sup-plies.

4. Items of work and construction details

8–1

NRCS-OKLA 8-2 November 2021 Payne County EWP

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) 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.

(4) This item shall also include providing an individual on the work crew who has a current first aid certificate from the Mine Safety and Health Administration, American Red Cross, or other state-approved organization.

(5) 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.

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

(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.

NRCS-OKLA 8-3 November 2021

(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 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.

(210–VI–NEH, Amend. 59, July 2012)

NRCS Supplement to OSHA Parts 1910 and 1926

The NRCS Supplement to OSHA Parts 1910 and 1926 is included in NRCS construction contracts and recommended for other contracts, such as CLO contracts, in which the NRCS is involved. It contains requirements that are not included in the OSHA requirements. It also emphasizes specific safety requirements that are covered in OSHA Parts 1910 and 1926.

Appendix F

F–ii (210–VI–NEH, Amend. 59, July 2012)

Part 645 National Engineering Handbook

Appendix F NRCS Supplement to OSHA Parts 1910 and 1926

NATURAL RESOURCES CONSERVATION SERVICE

SUPPLEMENT TO OSHA PARTS 1910 AND 1926

CONSTRUCTION INDUSTRY STANDARDS AND INTERPRETATIONS

The Contractor shall comply with OSHA (Occupational Safety and Health Administration) Parts 1910 and 1926, Construction Industry Standards and Interpretations, and with this supplement.

Requests for variances or waiver from this supplement are to be made to the Contracting Officer in writing supported by evidence that every reasonable effort has been made to comply with the contractual requirements. A written request for a waiver or a variance shall include--

(1) Specific reference to the provision or standard in question;

(2) An explanation as to why the waiver is considered justified; and

(3) The Contractor's proposed alternative, including technical drawings, materials, or equipment specifications needed to enable the Contracting Officer to render a decision.

No waiver or variance will be approved if it endangers any person. The Contractor shall not proceed under any requested revision of provision until the Contracting Officer has given written approval. The Contractor is to hold and save harmless the Natural Resources Conservation Service free from any claims or causes of action whatsoever resulting from the Contractor or subcontractors proceeding under a waiver or approved variance.

Copies of OSHA Parts 1910 and 1926, Construction Industry Standards and Interpretations, may be obtained from:

Superintendent of Documents U.S. Government Printing Office

Washington, D.C. 20402

1.0 GENERAL CONTRACTOR REQUIREMENTS:

1.1 SAFETY PROGRAM. Each Contractor is to demonstrate that he or she has facilities for conducting a safety program commensurate with the work under contract. The Contractor is to submit in writing a proposed comprehensive safety program to the Contracting Officer for approval before the start of construction operations.

The program is to specifically state what provisions the Contractor proposes to take for the health and safety of all employees, including subcontractors and rental equipment operators. The program shall be site specific and provide details relevant to the work to be done, the hazards associated with the work, and the actions that will be necessary to minimize the identified hazards.

1.2 PRECONSTRUCTION SAFETY MEETING. Representatives for the Contractor are to meet with the Contracting Officer (CO) or the CO's representative before the start of construction to discuss the safety program and the implementation of all health and safety standards pertinent to the work under this contract.

1.3 JOINT SAFETY POLICY COMMITTEE. The Contractor or designated on-site representative is to participate in monthly meetings of a joint Safety Policy Committee, composed of the Natural Resources Conservation Service (Contracting Local Organization in locally awarded contracts) and Contractor supervisory personnel. At these meetings the Contractor's project manager and the Contracting Officer will review the effectiveness of the Contractor's safety effort, resolve current health and safety problems, and coordinate safety activities for upcoming work.

1.4 SAFETY PERSONNEL. Each Contractor is to designate a competent supervisory employee satisfactory to the Contracting Officer to administer the safety program.

1.5 SAFETY MEETINGS. A minimum of one "on-the-job" or "toolbox" safety meeting is to be conducted each week by all field supervisors or foremen and attended by mechanics and all construction personnel at the jobsite.

The Contractor is to also conduct regularly scheduled supervisory safety meetings at least monthly for all levels of job supervision.

1.6 SAFETY INSPECTION. The Contractor shall perform frequent and regular safety inspections of the jobsite, materials, and equipment, and shall correct deficiencies.

1.7 FIRST AID TRAINING. Every Contractor foreman's work crew must include an employee who has a current first aid certificate from the Mine Safety and Health Administration, American Red Cross, or other state-approved organization.

1.8 REPORTS. Each Contractor is to maintain an accurate record of all job-related deaths, diseases, or disabling injuries. The records shall be maintained in a manner approved by the Contracting Officer. A copy of all reports is to be provided to the Contracting Officer. All fatal or serious injuries are to be reported immediately to the Contracting Officer, and every assistance is to be given in the investigation of the incident, including submission of a comprehensive narrative report to the Contracting Officer. Other occurrences with serious accident potential, such as equipment failures, slides, and cave-ins, must also be reported immediately. The Contractor is to assist and cooperate fully with the Contracting Officer in conducting accident investigations. The Contracting Officer is to be furnished all information and data pertinent to investigation of an accident.

1.9 CERTIFICATION OF INSURANCE. Contractors are to provide the Contracting Officer or his or her authorized representative with certificates of insurance before the start of operations indicating full compliance with State Worker's Compensation statutes, as well as other certificates of insurance required under the contract.

2.0 FIRST AID AND MEDICAL FACILITIES:

2.1 FIRST AID KITS. A 16-unit first aid kit approved by the American Red Cross is to be provided at accessible, well-identified, locations at the ratio of at least 1 kit for each 25 employees. The first aid kits are to be moisture proof and dust tight, and the contents of the kits are to be replenished as used or as they become ineffective or outdated.

2.2 EMERGENCY FIRST AID. At least one employee certified to administer emergency first aid must be available on each shift and duly designated by the Contractor to care for injured employees. The names of the certified employees shall be posted at the jobsite.

2.3 COMMUNICATION AND TRANSPORTATION. Prior to the start of work, the Contractor is to make necessary arrangements for prompt and dependable communications, transportation, and medical care for injured employees. At least one stretcher and two blankets shall be readily available for transporting injured employees.

2.4 FIRST AID AND MEDICAL REPORTS. The Contractor is to maintain a record system for first aid and medical treatment on the jobsite. Such records are to be readily available to the Contracting Officer and are to include--

(a) A daily treatment log listing chronologically all persons treated for occupational injuries and illnesses;

(b) Cumulative record of injury for each individual;

(c) Monthly statistical records of occupational injuries, classified by type and nature of injury; and

(d) Required records for worker's compensation.

2.5 SIGNS AND DIRECTIONAL MARKINGS. Adequate identification and directional markers are to be provided to readily denote the location of all first aid stations.

2.6 EMERGENCY LISTING. A listing of telephone numbers and addresses of doctor, rescue squad, hospital, police, and fire departments is to be provided at all first aid locations.

3.0 PHYSICAL QUALIFICATIONS OF EMPLOYEES:

3.1 GENERAL REQUIREMENTS. Persons employed throughout the contract are to be physically qualified to perform their assigned duties. Employees must not knowingly be permitted or required to work while their ability or alertness is impaired by fatigue, illness, or any other reason that may jeopardize themselves or others.

3.2 HOIST OPERATORS. Operators of cranes, cableways, and other hoisting equipment shall be examined annually by a physician and provided with a certification stating that they are physically qualified to safely operate hoisting equipment. The Contractor is to submit a copy of each certification to the Contracting Officer.

3.3 HEAVY EQUIPMENT OPERATORS. It is recommended that operators of trucks and heavy construction equipment be given physical examinations to determine if they are physically qualified to perform their assigned work without endangering themselves or others.

3.4 MOTOR VEHICLE OPERATORS. Operators of motor vehicles engaged primarily in the transportation of personnel are to be 18 years of age or older and have a valid state operator's permit or license for the equipment being operated. The operators must have passed a physical examination administered by a licensed physician within the past year showing that they are physically qualified to operate vehicles safely.

4.0 PERSONAL PROTECTIVE EQUIPMENT:

4.1 HARDHAT AREAS. The entire jobsite, with the exception of offices, shall be considered a hardhat area. All persons entering the area are, without exception, required to wear hardhats. The Contractor shall provide hardhats for visitors entering hardhat areas.

4.1.1 LABELS. Hardhats shall bear a manufacturer's label indicating design compliance with the appropriate ANSI (American National Standards Institute) standard.

4.2 POSTING. Signs at least 3 by 4 feet worded as follows with red letters (minimum 6 inches high) and white background shall be erected at access points to designated hardhat areas:

CONSTRUCTION AREA - HARDHATS REQUIRED BEYOND THIS POINT

These signs are to be furnished and installed by the Contractor at entries to shops, construction yards, and job access points.

4.3 SAFETY GOGGLES (DRILLERS)

4.3.1 DRILLERS AND HELPERS. Drillers and helpers operating pneumatic rock drills must wear protective safety goggles.

5.0 MACHINERY AND MECHANIZED EQUIPMENT:

5.1 SAFE CONDITION. Before any machinery or mechanized equipment is initially used on the job, it must be inspected and tested by qualified personnel and determined to be in safe operating condition and appropriate for the intended use. Operators shall inspect their equipment prior to the beginning of each shift. Any deficiencies or defects shall be corrected prior to using the equipment. Safety equipment, such as seatbelts, installed on machinery is to be used by equipment operators.

5.2 TAGGING AND LOCKING. The controls of power-driven equipment under repair are to be locked. An effective lockout and tagging procedure is to be established, prescribing specific responsibilities and safety procedures to be followed by the person or persons performing repair work. Mixer barrels are to be securely locked out before permitting employees to enter them for cleaning or repair.

5.3 HAUL ROADS FOR EQUIPMENT

5.3.1 ROAD MAINTENANCE. The Contractor shall maintain all roadways, including haul roads and access roads, in a safe condition so as to eliminate or control dust and ice hazards. Wherever dust is a hazard, adequate dust-laying equipment shall be available at the jobsite and utilized to control the dust.

5.3.2 SINGLE-LANE HAUL ROADS. Single-lane haul roads with two-way traffic shall have adequate turnouts.

Where turnouts are not practical, a traffic control system shall be provided to prevent accidents.

5.3.3 TWO-WAY HAUL ROADS. On two-way haul roads, arrangements are to be such that vehicles travel on the right side wherever possible. Signs and traffic control devices are to be employed to indicate clearly any variations from a right-hand traffic pattern. The road shall be wide enough to permit safe passage of opposing traffic, considering the type of hauling equipment used.

5.3.4 DESIGN AND CONSTRUCTION OF HAUL ROADS. Haul road design criteria and drawings, if requested by the Contracting Officer, are to be submitted for approval prior to road construction. Sustained grades shall not exceed 12 percent and all curves shall have open-sight line with as great a radius as practical. All roads shall be posted with curve signs and maximum speed limits that will permit the equipment to be stopped within one-half the minimum sight distance.

5.3.5 OPERATORS. Machinery and mechanized equipment shall be operated only by authorized qualified persons.

5.3.6 RIDING ON EQUIPMENT. Riding on equipment by unauthorized personnel is prohibited. Seating and safety belts shall be provided for the operator and all passengers.

5.3.7 GETTING ON OR OFF EQUIPMENT. Getting on or off equipment while the equipment is in motion is prohibited.

5.3.8 HOURS OF OPERATION. Except in emergencies, an equipment operator shall not operate any mobile or hoisting equipment for more than 12 hours without an 8-hour rest interval away from the job.

5.4 POWER CRANES AND HOISTS (TRUCK CRANES, CRAWLER CRANES, TOWER CRANES, GANTRY

CRANES, HAMMERHEAD CRANES, DERRICKS, CABLEWAYS, AND HOISTS)

5.4.1 PERFORMANCE TEST. Before initial onsite operation, at 12-month intervals, and after major repairs or modification, power cranes, derricks, cableways, and hoists must satisfactorily complete a performance test to demonstrate the equipment’s ability to safely handle and maneuver the rated loads. The tests shall be conducted in the presence of a representative of the Contracting Officer. Test data shall be recorded and a copy furnished the Contracting Officer.

5.4.2 PERFORMANCE TEST—POWER CRANES (Crawler mounted, truck mounted and wheel mounted). The performance test is to be carried out as per ANSI requirements. The test is to consist of raising, lowering, and braking the load and rotating the test load through 360° degrees at the specified boom angle or radius. Cranes equipped with jibs or boom-tip extensions are to be tested using both the main boom and the jib, with an appropriate test load in each case.

5.4.3 PERFORMANCE TEST—DERRICKS, GANTRY CRANES, TOWER CRANES, CABLEWAYS, AND

HOISTS, INCLUDING OVERHEAD CRANES. This equipment is to be performance tested as per ANSI requirements.

5.4.4 BOOM ANGLE INDICATOR. Power cranes (includes draglines) with booms capable of moving in the vertical plane shall be provided with a boom angle indicator in good working order.

5.4.5 CRANE TEST CERTIFICATION. The performance test required by 5.4.2 and 5.4.3 is fulfilled if the Contractor provides the Contracting Officer a copy of a certificate of inspection made within the past 12 months by a qualified person or by a government or private agency satisfactory to the Contracting Officer.

5.4.6 POSTING FOR HIGH VOLTAGE LINES. A notice of the 10-foot (or greater) clearance required by OSHA 1926.550, Subpart N, shall be posted in the operator’s cab of cranes, shovels, boom-type concrete pumps, backhoes, and related equipment.

5.4.7 BOOM STOPS. Cranes or derricks with cable-supported booms, except draglines, shall have a device attached between the gantry of the A-frame and the boom chords to limit the elevation of the boom. The device shall control the vertical motions of the boom with increasing resistance from 83° or less, until completely stopping the boom at not over 87° above horizontal.

5.4.8 SAFETY HOOKS. Hooks used in hoisting personnel or hoisting loads over construction personnel or in the immediate vicinity of construction personnel shall be forged steel equipped with safety keepers. When shackles are used under these conditions, they shall be of the locking type or have the pin secured to prohibit turning.

5.5 ROLLOVER PROTECTIVE STRUCTURES (ROPS)

5.5.1 ROLLOVER PROTECTIVE STRUCTURES. OSHA 1926, Subpart W, Overhead Protection, Sections 1001 and 1002 are applicable regardless of the year in which the equipment was manufactured and regardless of the struck capacity of the equipment.

5.5.2 EQUIPMENT REQUIRING ROPS. The requirement for ROPS meeting 5.5.1 above applies to crawler and rubber-tired tractors such as dozers, push-and-pull tractors, winch tractors, tractors with backhoes, and mowers;

off-highway, self-propelled, pneumatic-tired earthmovers, including scrapers, motor graders and loaders; and rollers, compactors, water tankers (excluding trucks with cabs). These requirements shall also apply to agricultural and industrial tractors and similar equipment.

5.5.3 EQUIPMENT REQUIRING SEATBELTS. The requirements for seatbelts as specified in OSHA Subpart 0, Motor Vehicles, Mechanized Equipment, and Marine Operations, Section 1926.602 shall also apply to self-propelled compactors and rollers, and rubber-tired skid-steer equipment.

6.0 LADDERS AND SCAFFOLDING:

6.1 LADDERS. OSHA 1926, Subpart L - Section 450. Ladders shall be used as work platforms only when use of small hand tools or handling of light material is involved. No work requiring lifting of heavy materials or substantial exertion shall be done from ladders.

6.2 SCAFFOLDING. OSHA 1926, Subpart L - Section 451. Scaffolds, platforms or temporary floors shall be provided for all work except that which can be done safely from the ground or similar footing.

6.3 SAFETY BELTS, LIFELINE, AND LANYARDS. OSHA 1926, Subpart E, Section 104. Lifelines, safety belts and lanyards independently attached or attended, shall be used when performing such work as the following when the requirements of 6.1 or 6.2 above cannot be met.

(a) Work on stored material in hoppers, bins, silos, tanks, or other confined spaces.

(b) Work on hazardous slopes, structural steel, or poles; erection or dismantling of safety nets, tying reinforcing bars; and work from Boatswain's chairs, swinging scaffolds, or other unguarded locations at elevations greater than 6 feet.

(c) Work on skips and platforms used in shafts by crews when the skip or cage does not block the opening to within 1 foot of the sides of the shaft, unless cages are provided.

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Chapter 2 National Standard Construction Specification Part 642 National Engineering Handbook

(210-VI-NEH, Amend. 2, Sept. 2018) 61–1

Construction Specification 61—Rock Riprap

1. Scope

The work consists of the construction of rock riprap revetments and blankets, including filter or bedding where specified.

2. Material Rock riprap must conform to the requirements of Material Specification 523, Rock for Riprap, or if so specified, must be obtained from designated sources. It must be free from dirt, clay, sand, rock fines, and other material not meeting the required gradation limits.

At least 30 days before rock is delivered from other than designated sources, the contractor must designate in writing the source from which rock material will be obtained and provide information satisfactory to the contracting officer that the material meets contract requirements. The contractor must provide the responsible engineer free access to the source for the purpose of obtaining samples for testing. The size and grading of the rock must be as specified in section 8.

Rock from approved sources must be excavated, selected, and processed to meet the specified quality and grading requirements at the time the rock is installed.

Based on a specific gravity of 2.65 (typical of limestone and dolomite) and assuming the individual rock is shaped midway between a sphere and a cube, typical size/weight relationships are:

Sieve size of rock

Approx. weight of rock

Weight of test pile

16 inches 300 pounds 6,000 pounds

11 inches 100 pounds 2,000 pounds

6 inches 15 pounds 300 pounds

When specified in section 8 or when it is necessary to verify the gradation of the rock riprap, a particle size analysis must be performed in accordance with ASTM D5519, Test Method A or B. The analysis must be performed at the work site on a test pile of representative rock. The mass of the test pile must be at least 20 times the mass of the largest rock in the pile. The results of the test are compared to the gradation required for the project. Test pile results that do not meet the construction specifications must be cause for the rock to be rejected. The test pile that meets contract requirements must be left on the job site as a sample for visual comparison.

The test pile must be used as part of the last rock riprap to be placed.

Filter or bedding aggregates when required must conform to Material Specification 521, Aggregates for Drainfill and Filters, unless otherwise specified. Geotextiles must conform to Material Specification 592, Geotextile.

3. Subgrade preparation The subgrade surface on which the rock riprap, filter, bedding, or geotextile is to be placed must be cut or filled and graded to the lines and grades shown on the drawings. When fill to subgrade lines is required, it must consist of approved material and must conform to the requirements of the specified class of earthfill.

Rock riprap, filter, bedding, or geotextile must not be placed until the foundation preparation is completed and the subgrade surface has been inspected and approved.

4. Equipment-placed rock riprap The rock riprap must be placed by equipment on the surface and to the depth specified. It must be installed to the full course thickness in one operation and in such a manner as to avoid serious displacement of the underlying material. The rock for riprap must be delivered and placed in a manner that ensures the riprap in place is 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. Some hand placing may be required to provide a neat and uniform surface.

61–2 (210-VI-NEH, Amend. 2, Sept. 2018)

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

5. Hand placed rock riprap The rock riprap must be placed by hand on the surface and to the depth specified. It must be securely bedded with the larger rocks firmly in contact one to another without bridging. Spaces between the larger rocks must be filled with smaller rocks and spalls.

Smaller rocks must not be grouped as a substitute for larger rock. Flat slab rock must be laid on its vertical edge except where it is laid like paving stone and the thickness of the rock equals the specified depth of the riprap course.

6. Filter or bedding When the contract specifies filter, bedding, or geotextile beneath the rock riprap, the designated material must be placed on the prepared subgrade surface as specified. Compaction of filter or bedding aggregate is not required, but the surface of such material must be finished reasonably smooth and free of mounds, dips, or windrows.

7. Measurement and payment Method 1—For items of work for which specific unit prices are established in the contract, the quantity of each type of rock riprap placed within the specified limits is computed to the nearest ton by actual weight. The volume of each type of filter or bedding aggregate is measured within the specified limits and computed to the nearest cubic yard by the method of average cross-sectional end areas. For each load of rock riprap placed as specified, the contractor must furnish to the responsible engineer a statement-of-delivery ticket showing the weight to the nearest 0.1 ton.

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

Method 2—For items of work for which specific unit prices are established in the contract, the quantity of each type of rock riprap placed within the specified limits is computed to the nearest 0.1 ton by actual weight. The quantity of each type of filter or bedding aggregate delivered and placed within the specified limits is computed to the nearest 0.1 ton. For each load of rock riprap placed as specified, the contractor must furnish to the engineer a statement-of-delivery ticket showing the weight to the nearest 0.1 ton. For each load of filter or bedding aggregate, the contractor must furnish to the responsible engineer a statement-of-delivery ticket showing the weight to the nearest 0.1 ton.

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

Method 3—For items of work for which specific unit prices are established by the contract, the volume of each type of rock riprap and filter or bedding aggregate is measured within the specified limits and computed to the nearest cubic yard by the method of average cross-sectional end areas.

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

Method 4—For items of work for which specific unit prices are established by the contract, the volume of each type of rock riprap, including filter and bedding aggregate, is measured within the specified limits and computed to the nearest cubic yard by the method of average cross-sectional end areas.

(210-VI-NEH, Amend. 2, Sept. 2018) 61–3

Payment is made at the contract unit price for each type of rock riprap, including filter and bedding. Such payment is considered full compensation for completion of the work.

Method 5—For items of work for which specific unit prices are established by the contract, the quantity of each type of rock riprap placed within the specified limits is computed to the nearest ton by actual weight. For each load of rock for riprap placed as specified, the contractor must furnish to the responsible engineer a statement-of-delivery ticket showing the weight to the nearest 0.1 ton.

Payment is made at the contract unit price for each type of rock riprap, and includes compensation for any aggregate or geotextile installed as specified for filter or bedding. Such payment is considered full compensation for completion of the work.

Method 6—For items of work for which specific unit prices are established by the contract, the volume of each type of rock riprap is measured within the specified limits and computed to the nearest cubic yard by the method of average cross-sectional end areas.

Payment is made at the contract unit price for each type of rock riprap and includes compensation for any aggregate or geotextile installed as specified for filter or bedding. Such payment is considered full compensation for completion of the work.

All methods—The following provision applies 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.

No separate payment is made for testing the gradation of the test pile. Compensation for testing is included in the appropriate bid item for riprap.

8. Items of work and construction details

NRCS-OKLA 61-4 November 2021

8. ITEMS OF WORK AND CONSTRUCTION DETAILS

Riprap shall meet the requirements of Rock Type 3 of Material Specification 523, Section 2.

Riprap Bedding shall meet the requirements of Material Specification 521, Section 2.

All rock must be delivered to the site with end dump trailers unless other delivery methods are approved by the Government.

All rock may be equipment placed.

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 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 construction details are:

a. Rock Riprap, Installed

(1) This item shall consist of furnishing and installing rock riprap on the slopes to a thickness of 48” and in the keyway footings and cutoff trench to the extent shown on the drawings and as described in this specification. Use the gradation as shown in the attached Oklahoma Department of Trasportation table.

NRCS-OKLA 61-5 November 2021

Riprap Gradation - (Approximate)

Riprap

Thickness (inches)

Max Wt

(lbs)

Max Size (in)

Avg Wt (lbs)

Avg Size (in)

Not More Lighter Than than 20% Smaller 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.

48 2000 30 450-800 19-23 80 lbs. 10 in.

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 a 12” thickness on the slopes to 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.

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

NRCS-OKLA 61-6 November 2021

(3) Bedding will conform to the following gradation:

Riprap-Bedding Gradation - (Approximate)

Size % Passing 4" 100 2" 60-90 1" 40-70 #4 0-15

(4) 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.

(5) 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.

(6) 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) Crushed Rock will be 1-1/2" Crusher Run.

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

NRCS-OKLA 264E-1 July 2010

CONSTRUCTION SPECIFICATION

264E. OBSTRUCTION REMOVAL

1. SCOPE

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.

NRCS-OKLA 264E-4 August 2021

8. ITEMS OF WORK AND CONSTRUCTION DETAILS

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

Part 642 National Engineering Handbook

National Standard Material Specifications

Chapter 3

521–1(210–VI–NEH, January 2014)

Material Specification 521—Aggregates for Drainfill and Filters

1. Scope This specification covers the quality of mineral aggre-gates for the construction of drainfill and filters.

2. Quality Drainfill and filter aggregates shall be sand, gravel, or crushed stone or mixtures thereof. Aggregates shall be composed of clean, hard, durable, mineral particles free from organic matter, clay balls, soft particles, or other substances that would interfere with the free-draining properties of the aggregates.

Coarse aggregate may be crushed limestone or other material that has limestone particles included. Ag-gregates from crushed limestone shall be thoroughly washed and screened to remove limestone dust, lime-stone fines, and fine soil particles. Limestone shall not be used for fine aggregates except in combination with other material, such that not more than 5 percent of the portion finer than the No. 4 sieve shall be lime-stone.

Aggregates shall be tested for soundness according to ASTM Method C88 and shall have a weighted aver-age loss in 5 cycles of not more than 12 percent when sodium sulfate is used or 18 percent when magnesium sulfate is used.

3. Grading Drainfill and filter aggregates shall conform to the specified grading limits after being placed or after being compacted when compaction is specified. Grad-ing shall be determined by ASTM Method C136. The percentage of material finer than the No. 200 sieve shall be determined by the method in ASTM Designa-tion C117.

4. Storing and handling Drainfill and filter aggregates shall be stored and han-dled by methods that prevent segregation of particle sizes or contamination by mixing with other material.

National Standard Material Specifications

Chapter 3

(210–VI–NEH, January 2014)

523–1

(210–642–H, Amend.2, Sept. 2018)

Chapter 3 National Standard Material

Specifications

Material Specification 523—Rock for Riprap

1. Scope This specification covers the quality of rock to be used in the construction of rock riprap.

2. Quality Individual rock fragments must be dense, sound, and free from cracks, seams, and other defects conducive to accelerated weathering. Except as otherwise specified, the rock fragments must be angular to subrounded. The least dimension of an individual rock fragment must not be less than one-third the greatest dimension of the fragment. ASTM D4992 provides guidance on selecting rock.

Except as otherwise provided, the rock must be tested and must have the following properties:

Rock type 1

• Bulk specific gravity (saturated surface-dry basis)—Not less than 2.5 when tested in accordance with ASTM D6473 on samples prepared as described for soundness testing.

• Absorption—Not more than 2 percent when tested in accordance with ASTM D6473 on samples prepared as described for soundness testing.

• Soundness—The weight loss in five cycles must not be more than 10 percent when sodium sulfate is used or more than 15 percent when magnesium sulfate is…