Attachment 1 - Specifications revised 5-8-26.pdf

STEVE MORNHINWEG WRE PROJECT

NOBLE COUNTY 2025

SPECIFICATION INDEX

CONSTRUCTION SPECIFICATIONS

2-CLEARING AND GRUBBING

6-SEEDING, SPRIGGING, AND MULCHING

7-CONSTRUCTION SURVEYS

8-MOBILIZATION

21-EXCAVATION

23-EARTHFILL

26-TOPSOIL

32-STRUCTURE CONCRETE

52-STEEL PIPE

94-CONTRACTOR QUALITY CONTROL

MATERIAL SPECIFICATIONS

522-AGGREGATES FOR PORTLAND CEMENT CONCRETE

531-PORTLAND CEMENT

534-CONCRETE CURING COMPOUND

539-STEEL REINFORCEMENT (FOR CONCRETE)

554-STEEL PIPE

581-METAL

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(210-VI-NEH, May 2001)

Construction Specification 2—Clearing and Grubbing

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

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

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

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

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

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

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

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

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

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

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

The size of each stump is measured at the top. Diameter is determined by dividing the measured circumference by 3.14.

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

Measured diameter Size designation

(in) (in)

4 to 8 6 8 to 12 10

12 to 24 18 24 to 36 30 36 to 60 48 Over 60 60

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

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

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

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

NRCS – 07/2023 2-3 Steve Mornhinweg WRE Noble County, Oklahoma

7. Items of work and construction details

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

a. Bid Item 2, Clearing & Grubbing

(1) This item consists of furnishing all materials, labor, and equipment necessary for clearing the Wetland Units #2, #3, #4, #5 and the area of the Circle Pit, Deep Water Habitat, Earthfill and Excavation work areas by the removal and disposal of any trees, snags, stumps, shrubs, logs, rubbish, and vegetative materials as shown on the drawings or as directed by the Contracting Officer’s Representative.

(2) Disposal of trees, snags, logs, stumps, shrubs, and rubbish material shall be by burning and/or burying onsite at locations to be designated in the field by the Contracting Officer’s Representative.

(3) Payment shall be by Section 6, Method 4 of this specification.

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

Construction Specification 6—Seeding, Sprigging, and Mulching

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

The following BioPreferred® product categories are applicable to this specification:

— Mulch and compost materials

— Erosion control materials

— Fertilizers

— Agricultural spray adjuvants

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

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

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

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

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

Lime and other soil amendments—Lime must consist of standard ground agriculture limestone, or approved equivalent. Standard ground agriculture limestone is defined as ground limestone meeting current requirements of the State department of agriculture.

Other soil amendments must meet quality criteria and application requirements specified in section 7.

Mulch tackifiers—Asphalt emulsion tackifiers must conform to the requirements of ASTM D977, Specification for Emulsified Asphalt. The emulsified asphalt may be rapid setting, medium setting, or slow setting. Nonasphaltic tackifiers required because of environmental considerations must be as specified in section 7.

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

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

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

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

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

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

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

Seedbed preparation must be discontinued when soil moisture conditions are not suitable for the preparation of a satisfactory seedbed as determined by the responsible engineer.

5. Seeding, sprigging, fertilizing, mulching, and stabilizing All seeding or sprigging operations must be performed in such a manner that the seed or sprigs are applied in the specified quantities uniformly in the designated areas. The method and rate of seed application must be as specified in section 7. Unless otherwise specified, seeding or sprigging must be accomplished within 2 days after final grading is completed and approved.

Fertilizer, lime, and other soil amendments must be applied as specified in section 7. When specified, the fertilizer and soil amendments must be thoroughly incorporated into the soil immediately following surface application.

The rate, amount, and kind of mulching or mesh must be as specified in section 7. Mulches must be applied uniformly to the designated areas. They must be applied to areas seeded not later than 2 working days after seeding has been performed. Straw mulch material must be stabilized within 24 hours of application using a mulch crimper or equivalent anchoring tool or by a suitable tackifier. When the mulch crimper or equivalent anchoring tool is used, it must have straight blades and be the type manufactured expressly for and capable of firmly punching the mulch into the soil. Where the equipment can be safely operated, it must be operated on the contour. Hand methods must be used where equipment cannot safely operate to perform the work required.

The tackifier must be applied uniformly over the mulch material at the specified rate, or it must be injected into the mulch material as it is being applied. Mesh or netting stabilizing materials must be applied smoothly but loosely on the designated areas. The edges of these materials must be buried or securely anchored using spikes or staples as specified in section 7.

The contractor must maintain the mesh or netting areas until all work under the contract has been completed and accepted.

Maintenance must consist of the repair of areas damaged by water erosion, wind, fire, or other causes. Such areas must be repaired to reestablish the intended condition and to the design lines and grades required by the contract. The areas must be refertilized, reseeded, and remulched before the new application of the mesh or netting.

6. Measurement and payment Method 1—For items of work for which specific unit prices are established in the contract, each area treated is measured as specified in section 7 and the area is calculated to the nearest 0.1 acre. Payment for treatment is made at the contract unit price for the designated treatment, which will constitute full compensation for completion of the work.

When specified as an item of work, mesh or netting is measured to the nearest square yard of surface area covered and accepted.

Payment is made at the contract unit price and will constitute full compensation for completion of the work.

(210-VI-NEH, Amend. 2, Sept. 2018) 6–3

Method 2—For items of work for which specific lump-sum prices are established in the contract, the quantity of work will not be measured for payment. Payment for this item is made at the contract lump-sum price for the item and constitutes full compensation for the completion of the work.

Method 3—For items of work for which lump-sum prices are established in the contract, payment is made as the work proceeds.

Progress payments are determined as specified in section 7. Payment of the lump sum contract price constitutes full compensation for completion of the work.

All Methods—The following provisions apply to all methods of measurement and payment. Compensation for any item of work described in the contract but not listed in the bid schedule is included in the payment for the item of work to which it is made subsidiary. Such items and the items to which they are made subsidiary are identified in section 7.

NRCS-7/2023 6-4 Steve Mornhinweg WRE Noble County

7. ITEMS OF WORK AND CONSTRUCTION DETAILS

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

a. Bid Item 12, Sprigging, Bermudagrass

(1) This item consists of furnishing, fertilizing, and planting bermudagrass (Cynodon dactylon) sprigs and applying hay mulch on the constructed embankments, excavated auxiliary spillways, and other disturbed areas as directed by the Contracting Officer’s Representative.

(2) Sprigs shall consist of healthy uninjured live stems, runners (stolons), and root divisions (rhizomes) of locally adapted bermudagrass varieties. The contractor shall notify the engineer of the sources of bermudagrass sprigs and secure approval of the sources before any roots are harvested and delivered to the job site. The contractor shall provide the engineer free access to the source for the purpose of inspection.

(a) Prior to harvest, top growth greater than two inches shall be removed from the area where the sprigs are obtained.

(b) sprigs shall be kept moist and protected from wind and sunlight following harvest and during periods of transportation and/or storage.

(c) Sprigs shall be planted within 30 hours of harvest.

(3) Planting times shall be between February 1 and June 15.

(4) Fertilizer shall be a 1-1-1 ratio in a pelleted form and uniformly mixed. Labeling or analysis records shall be in accordance with the Oklahoma Fertilizer Law. Where fertilizer is furnished from bulk storage, the contractor shall furnish a supplier's certification of analysis and weight.

(a) Fertilizer shall be uniformly applied at a rate of 40 pounds nitrogen, 40 pounds phosphate (P2O5), and 40 pounds potash (K2O) per acre.

(b) The fertilizer shall be incorporated into the soil prior to planting or by the planting equipment, provided the fertilizer is not applied in such a manner as to be in direct contact with the sprigs.

(5) Site Preparation - Prior to sprigging, the area shall be prepared by any method which will result in a clean, friable, firm seedbed.

(a) Tillage will be at a minimum depth of 4 inches.

(b) Rills and gullies will be filled or tilled if needed prior to seeding.

(6) Sprigs shall be planted in the following manner:

(a) Within 24 hours of site preparation. The soil at the time of planting shall be moist and not frozen. If planting cannot be accomplished when adequate moisture is

NRCS-7/2023 6-5 Steve Mornhinweg WRE available (moisture cannot be detected to a depth of 4”), areas to be planted shall be moistened to a depth of 2 inches prior to sprigging and immediately following.

(b) Planted at a depth between one and three inches.

(c) Sprigs will be uniformly distributed at a minimum rate of 60-80 bushels of sprigs per acre and planted on the approximate contour, with a distance between rows not to exceed 24 inches.

(d) Sprigs may need to be manually planted in areas inaccessible to equipment by placing a minimum of 3 healthy sprigs on a maximum of 15-inch centers with soil firmly packed over the sprigs.

(e) After planting, the area shall be compacted with a flexible rolling-type soil packer or cultipacker, and left in a smooth condition.

(7) Hay Mulch shall be free of noxious weed seeds and other invasive pests and shall consist of native prairie, weeping lovegrass, introduced bluestem, or fescue. Hay mulch should have been harvested at a time when stems are available.

(a) Mulch shall be applied after planting operations.

(b) Mulch shall be applied in a reasonably continuous unbroken cover of uniform thickness at a rate of not less than 2 1/2 tons of air-dry hay per acre (1 lb/sq.yd). A minimum 80% ground cover for all designated treatment areas shall be achieved.

(c) Mulch shall be anchored into the soil to a minimum depth of 2 inches by pinning, crimping, or other methods approved by the COR. Anchoring shall be done on the approximate contour at a spacing of no more than 8 inches and set to run straight.

The operation shall be such that approximately 50% of the mulch material remains on the soil surface after anchoring. The mulch shall be anchored within the same day as spreading.

(8) Measurement and Payment for Sprigging, Bermudagrass shall be by Method 1 as described in Section 6 of this specification.

NRCS-7/2023 6-6 Steve Mornhinweg WRE

b. Bid Item 13, Native Grass Seeding

(1) This item consists of site preparation, furnishing materials, fertilizing, planting a native grass seed mixture, and applying hay mulch on finished spoils areas from excavations, and other disturbed areas as directed by the Contracting Officer’s Representative

(COR).

(2) Seed from local native harvest will be used unless named varieties are proven superior.

Seed source shall be less than 300 miles south and west and less than 150 miles north and east of the job site. The germination test used to determine PLS is valid for 9 months after the end of the month the test was made so long as the seed remains in Oklahoma.

(3) Seeding dates: December 1 to June 1.

(4) Native grass seed mixture:

SPECIES ADAPTED VARIETIES PLS

(Lbs./Ac)

Grasses Indiangrass Cheyenne, Lometa 4.0 Switchgrass Blackwell 1.4 Big Bluestem Kaw 1.2 Little Bluestem Aldous 0.25 Sideoats Grama El Reno 0.24

Florida Paspalum Harrison 0.6

Buffalograss Texoka (unhulled), Bison 2.5

Eastern Gamagrass Verl, Pete, Luk, PMK-

24 4.6 Legumes Illinois Bundleflower 0.4 Partridge Pea 0.08 Maximilian Sunflower Aztec 0.16

(5) Site Preparation - Prior to seeding, the area shall be prepared by any method which will result in a clean, friable, firm seedbed.

(a) Tillage will be at a minimum depth of 4 inches

(b) Rills and gullies will be filled or tilled if needed prior to seeding.

(6) Fertilizers shall be a 1-1-1 ratio in a pelleted form and uniformly mixed. Labeling or analysis records shall be in accordance with the Oklahoma Fertilizer Law. Where

NRCS-7/2023 6-7 Steve Mornhinweg WRE fertilizer is furnished from bulk storage, the contractor shall furnish a supplier's certification of analysis and weight.

(a) Fertilizer shall be uniformly applied at a rate of 40 pounds nitrogen, 40 pounds phosphate (P2O5), and 40 pounds potash (K2O) per acre.

(b) The fertilizer shall be incorporated into the soil prior to planting or by the planting equipment, provided it is not applied in such a manner as to be in direct contact with the seeds.

(7) Seeding of the mix will be in the following manner:

(a) Drilled with a grass drill equipped with double coulter furrow openers with depth bands, followed by a cultipacker, press wheels, or drag chains. Seed shall be uniformly mixed and planted ¼ to ½ inch deep. Row spacing shall not exceed 12 inches.

(b) In areas inaccessible to equipment or due to slope steepness, broadcasting may be used so long as seed can be firmly anchored into the soils at a depth of ¼ to ½ inch.

(8) Hay Mulch shall be free of noxious weed seeds and other invasive pests and shall consist of native prairie, or fescue. Hay mulch should have been harvested at a time when stems are available.

(a) Mulch shall be applied after planting operations.

(b) Mulch shall be applied in a reasonably continuous unbroken cover of uniform thickness at a rate of not less than 2 ½ tons of air-dry hay per acre (1 lb/sq.yd). A minimum 80% ground cover for all designated treatment areas shall be achieved.

(c) Mulch shall be anchored into the soil to a minimum depth of 2 inches by pinning, crimping, or other methods approved by the GR. Anchoring shall be done on the approximate contour at a spacing of no more than 8 inches and set to run straight. The operation shall be such that approximately 50% of the mulch material remains on the soil surface after anchoring. The mulch shall be anchored within the same day as spreading.

(9) Measurement and Payment for Native Grass Seeding shall be by Method 1 as described in Section 6 of this specification.

210 H 642 CS 7 (June 2024) 1

Construction Specification 7 — Construction Surveys

Title 210 – Engineering Part 642 –Specifications for Construction Contracts Subpart B – National Construction Specifications June 2024

A. Scope

1. The work consists of performing all surveys, measurements, and computations required by this specification.

B. Equipment and Material

1. Equipment for construction surveys must be of a quality and condition to provide the required accuracy. The equipment must be maintained in good working order and in proper adjustment at all times. Records of repairs, calibration tests, accuracy checks, and adjustments must be maintained and be available for inspection by the engineer. Equipment must be checked, tested, and adjusted as necessary in conformance with manufacturer’s recommendations.

2. Necessary materials include field notebooks, stakes, templates, platforms, equipment, spikes, steel pins, tools, and all other items necessary to perform the work specified.

C. Quality of Work

1. All work must follow recognized professional practice and the standards of the industry unless otherwise specified in Section I of this specification. Perform the work to the accuracy and detail appropriate for the type of job. Notes, sketches, and other data must be complete, neatly recorded, legible, reproducible, and organized to facilitate ease in review for job documentation. Survey equipment that requires little or no manual recording of field data must have survey information documented as outlined in Section I of this specification.

2. All computations must be mathematically correct and include information to identify the bid item, date, and the person who performed, checked, and approved the computations. Computations must be legible, complete, and clearly document the source of all information used, including assumptions and measurements collected.

3. If a computer program is used to perform the computations, the contractor must provide the engineer with the software identification, vendor’s name, version number, and other pertinent data before beginning survey activities. Computer-generated computations must show all input data, including values assigned and assumptions made.

210 H 642 CS 7 (June 2024) 2

4. Determine and record the elevations of permanent and temporary benchmarks to the nearest 0.01 foot. Differential leveling and transit traverses must be of such precision that the error of vertical closure in feet must not exceed plus or minus

0.1 times the square root of the traverse distance in miles. Linear measurements must be accurate to within 1 foot in 5,000 feet unless otherwise specified in Section I of this specification. The angular error of closure for transit traverses must not exceed 1 minute times the square root of the number of angles turned.

5. The minimum requirements for placing slope stakes must be at 100-foot stations for tangents and as little as 25 feet for sharp curves, breaks in the original ground surface, and at any other intermediate stations necessary to ensure accurate location for construction layout and measurement. Slope stakes and cross-sections must be perpendicular to the centerline. Significant breaks in grade must be determined for cross-sections. Distances must be measured horizontally and recorded to the nearest 0.1 foot. Side shots for interim construction stakes may be taken with a hand level.

6. Unless otherwise specified in Section I of this specification, measurements for stationing and establishing the location of structures must be made to the nearest

0.1 foot.

7. Elevations for concrete work, pipes, and mechanical equipment must be determined and recorded to the nearest 0.01 foot. Elevations for earthwork must be determined and recorded to the nearest 0.1 foot.

D. Primary Control

1. The baselines and benchmarks for primary control necessary to establish lines and grades needed for construction are shown on the drawings and have been located on the jobsite.

2. These baselines and benchmarks must be used as the origin of all surveys, layouts, and measurements to establish construction lines and grades. The contractor must take all necessary precautions to prevent the loss or damage of primary control points. Any stakes or control points lost or damaged by construction activity will be reestablished by the contractor or at contractor expense.

E. Construction Surveys

1. All Methods. Before starting work that requires contractor-performed surveys, the contractor must submit in writing for the engineer’s review the names, qualifications, and experiences of the individuals to be assigned to the survey tasks.

2. Method 1. Contractor-performed surveys must include:

a. Checking and any supplemental or interim staking

b. Performing quantity surveys, measurements, and computations for progress payment

c. Other surveys as described in Section I of this specification

210 H 642 CS 7 (June 2024) 3

3. Method 2. Contractor-performed surveys must consist of all work necessary for:

a. Establishing line and grade for all work

b. Setting slope stakes for all work

c. Checking and any supplemental or interim staking

d. Establishing final grade stakes

e. Performing quantity surveys, measurements, and computations for progress payment

f. Other surveys as described in Section I of this specification

4. Method 3. Contractor-performed surveys must consist of all work necessary for:

a. Establishing line and grade for all work

b. Setting slope stakes for all work

c. Checking and any supplemental or interim staking

d. Establishing final grade stakes

e. Performing quantity surveys, measurements, and computations for progress payments

f. Performing initial and final surveys for determinations of final quantities

g. Other surveys as described in Section I of this specification.

F. Staking

1. Complete the construction staking required for the item before work on any item starts. Complete construction staking as follows or as otherwise specified in Section I of this specification:

a. Clearing and Grubbing. The boundary of the areas to be cleared and grubbed must be staked or flagged at a maximum interval of 200 feet, closer if needed, to clearly mark the limits of work. When contractor staking is the basis for determining the area for final payment, all boundary stakes will be reviewed by the engineer before start of this work item.

b. Excavation and Fill. Place slope stakes at the intersection of the specified slopes and ground line. Slope stakes and the reference stakes for slopes must be marked with the stationing, required cut or fill, slope ratio, and horizontal distance from the centerline or other control line. The minimum requirements for placing slope stakes are outlined in Section C, Quality of Work.

c. Structures. Place centerline and offset reference line stakes for location, alignment, and elevation for all structures.

G. Records

1. Record all survey data in properly labeled, standard, hardbound engineering survey field notebooks with consecutively numbered pages. All field notes and printed data must include the purpose or description of the work, the date the work was performed, weather data, sketches, and the personnel who performed and checked the work. Electronically generated survey data and computations must be bound with numbered pages and cross-referenced in a bound field notebook containing the index for all survey activities. All work must follow recognized professional practices.

210 H 642 CS 7 (June 2024) 4

2. The construction survey records must be available at all times during the progress of the work for examination and use by the engineer. When requested, copies must be made available. The original field notebooks and other records must be provided to and become the property of the owner before final payment and acceptance of all work.

3. Complete documentation of computations and supporting data for progress payments must be submitted to the engineer with each invoice for payment as specified in Section I of the specification. When the contractor is required to conduct initial and final surveys as outlined in Section E, Construction Surveys, notes must be provided as soon as possible after completion to the engineer for the purpose of determining final payment quantities.

H. Payment

1. Method 1. For items of work for which lump-sum prices are established in the contract, payment is made as the work proceeds after presentation of correct and accurate invoices by the contractor showing related costs and evidence of the charges of suppliers, subcontractors, and others for supplies furnished and work performed. Invoices for the total amount of the contract price will not be accepted until all surveys are complete and required documentation has been determined complete. If the total of such payments is less than the lump-sum contract price for this item, the unpaid balance will be included in the final contract payment.

Payment of the lump-sum contract price will constitute full compensation for completion of all work under the bid item.

2. Method 2. For items of work for which lump-sum prices are established in the contract, payment is made as the work proceeds with progress payment amounts determined as a percentage of the total work planned as projected from the contractor’s approved construction schedule. Payment of the lump-sum contract price will constitute full compensation for completion of all work under this bid item.

3. All Methods. Payment will not be provided under this item for the purchase price of materials or equipment having a residual value. Compensation for any item of work described in the contract but not listed in the bid schedule will be included in the payment for the item of work to which it is made subsidiary. Such items and the item to which they are made subsidiary are identified in Section I of this specification.

NRCS – 02/2021 7-5 Steve Mornhinweg WRE

I. ITEMS OF WORK AND CONSTRUCTION DETAILS

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

1. Subsidiary Item, Construction Surveys

a. This item consists of conducting surveys for construction controls.

b. In Section D Primary Control, baselines and benchmarks for primary control necessary to establish lines and grades will be provided by the government.

c. In Section E Construction Surveys, Method 2 shall apply.

(1) Re-staking any original government layout or references that are removed or destroyed is the responsibility of the contractor.

d. In Section F Staking, construction staking required for the items before work on any item starts will be provided by the government.

e. No separate payment will be made for Construction Surveys. Compensation will be included in the payment for Bid Item 1, Mobilization.

NRCS – 02/2021 7-6 Steve Mornhinweg WRE

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210 H 642 CS 8 (June 2024) 1

Construction Specification 8 — Mobilization and

Demobilization

Title 210 – Engineering Part 642 – Specifications for Construction Contracts Subpart B – National Construction Specifications June 2024

A. Scope

1. The work consists of the mobilization and demobilization of the contractor’s forces and equipment necessary for performing the work required under the contract. It does not include mobilization and demobilization for specific items of work for which payment is provided elsewhere in the contract. Mobilization will not be considered as work in fulfilling the contract requirements for commencement of work.

B. Equipment and Material

1. Mobilization includes 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 D of this specification.

2. Demobilization includes 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.

3. 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.

C. Payment

1. 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 compensation for completion of the work.

210 H 642 CS 8 (June 2024) 2

2. 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 supplies.

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D. ITEMS OF WORK AND CONSTRUCTION DETAILS

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

1. Bid Item 1, Mobilization

a. This item consists of the mobilization and demobilization of the contractor’s forces and equipment necessary for performing the work required under this contract.

b. This item also consists of establishing, stabilizing, maintaining, and restoring the ingress-egress road. The ingress-egress road shall be restored back to a condition “as-good-as” or better than it was prior to the start of construction.

c. In addition, this item further consists of the removal of existing fences as necessary to access the work site and the construction of a temporary ingress-egress gate(s) as needed. Any temporary ingress-egress gate(s) installed, or fence removed shall be restored to a condition “as-good-as” or better than it was prior to the start of construction, once construction is complete. See Construction Specification 92 – Field Fence.

d. 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 contracting officer immediately.

e. 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.

f. This item shall also include the securing of any bonds or payment protection, and payment for such, as required by the Contracting Officer under the terms of this contract.

g. 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

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h. Items of work subsidiary to Mobilization are:

(1) Construction Surveys - Construction Specification 7

(2) Contractor Quality Control - Construction Specification 94

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Construction Specification 21—Excavation

1. Scope The work shall consist of the excavation required by the drawings and specifications and disposal of the excavated materials.

2. Classification Excavation is classified as common excavation, rock excavation, or unclassified excavation in accordance with the following definitions.

Common excavation is defined as the excavation of all materials that can be excavated, transported, and unloaded using heavy ripping equipment and wheel tractor-scrapers with pusher tractors or that can be excavated and dumped into place or loaded onto hauling equipment by excavators having a rated capacity of one cubic yard or larger and equipped with attachments (shovel, bucket, backhoe, dragline, or clam shell) appropriate to the material type, character, and nature of the materials.

Rock excavation is defined as the excavation of all hard, compacted, or cemented materials that require blasting or the use of ripping and excavating equipment larger than defined for common excavation. The excavation and removal of isolated boulders or rock fragments larger than 1 cubic yard encountered in materials otherwise conforming to the definition of common excavation shall be classified as rock excavation. The presence of isolated boulders or rock fragments larger than 1 cubic yard is not in itself sufficient cause to change the classification of the surrounding material.

For the purpose of these classifications, the following definitions shall apply:

Heavy ripping equipment is a rear-mounted, heavy duty, single-tooth, ripping attachment mounted on a track type tractor having a power rating of at least 250 flywheel horsepower unless otherwise specified in section 10.

Wheel tractor-scraper is a self-loading (not elevating) and unloading scraper having a struck bowl capacity of at least 12 cubic yards.

Pusher tractor is a track type tractor having a power rating of at least 250 flywheel horsepower equipped with appropriate attachments.

Unclassified excavation is defined as the excavation of all materials encountered, including rock materials, regardless of their nature or the manner in which they are removed.

3. Blasting The transportation, handling, storage, and use of dynamite and other explosives shall be directed and supervised by a person(s) of proven experience and ability who is authorized and qualified to conduct blasting operations.

Blasting shall be done in a manner as to prevent damage to the work or unnecessary fracturing of the underlying rock materials and shall conform to any special requirements in section 10 of this specification. When specified in section 10, the contractor shall furnish the engineer, in writing, a blasting plan before blasting operations begin.

4. Use of excavated material Method 1—To the extent they are needed, all suitable material from the specified excavations shall be used in the construction of required permanent earthfill or rockfill. The suitability of material for specific purposes is determined by the engineer. The contractor shall not waste or otherwise dispose of suitable excavated material.

Method 2—Suitable material from the specified excavations may be used in the construction of required earthfill or rockfill. The suitability of material for specific purposes is determined by the engineer.

5. Disposal of waste materials Method 1—All surplus or unsuitable excavated materials are designated as waste and shall be disposed of at the locations shown on the drawings.

Method 2—All surplus or unsuitable excavated materials are designated as waste and shall be disposed of by the contractor at sites of his own choosing away from the site of the work. The disposal shall be in an environmentally acceptable manner that does not violate local rules and regulations.

6. Excavation limits Excavations shall comply with OSHA Construction Industry Standards (29CFR Part 1926) Subpart P, Excavations, Trenching, and Shoring. All excavations shall be completed and maintained in a safe and stable condition throughout the total construction phase. Structure and trench excavations shall be completed to the specified elevations and to the length and width required to safely install, adjust, and remove any forms, bracing, or supports necessary for the installation of the work. Excavations outside the lines and limits shown on the drawings or specified herein required to meet safety requirements shall be the responsibility of the contractor in constructing and maintaining a safe and stable excavation.

7. Borrow excavation When the quantities of suitable material obtained from specified excavations are insufficient to construct the specified earthfills and earth backfills, additional material shall be obtained from the designated borrow areas. The extent and depth of borrow pits within the limits of the designated borrow areas shall be as specified in section 10 or as approved by the engineer.

Borrow pits shall be excavated and finally dressed to blend with the existing topography and sloped to prevent ponding and to provide drainage.

8. Overexcavation Excavation in rock beyond the specified lines and grades shall be corrected by filling the resulting voids with portland cement concrete made of materials and mix proportions approved by the engineer. Concrete that will be exposed to the atmosphere when construction is completed shall meet the requirements of concrete selected for use under Construction Specification 31, Concrete for Major Structures, or 32, Structure Concrete, as appropriate.

Concrete that will be permanently covered shall contain not less than five bags of cement per cubic yard. The concrete shall be placed and cured as specified by the engineer.

Excavation in earth beyond the specified lines and grades shall be corrected by filling the resulting voids with approved, compacted earthfill. The exception to this is that if the earth is to become the subgrade for riprap, rockfill, sand or gravel bedding, or drainfill, the voids may be filled with material conforming to the specifications for the riprap, rockfill, bedding, or drainfill.

Before correcting an overexcavation condition, the contractor shall review the planned corrective action with the engineer and obtain approval of the corrective measures.

9. Measurement and payment For items of work for which specific unit prices are established in the contract, the volume of each type and class of excavation within the specified pay limits is measured and computed to the nearest cubic yard by the method of average cross-sectional end areas or by methods outlined in section 10 of this specification. Regardless of quantities excavated, the measurement for payment is made to the specified pay limits except that excavation outside the specified lines and grades directed by the engineer to remove unsuitable material is included. Excavation required because unsuitable conditions result from the contractor's improper construction operations, as determined by the engineer, is not included for measurement and payment.

Method 1—The pay limits shall be as designated on the drawings.

Method 2—The pay limits shall be defined as follows:

a. The upper limit shall be the original ground surface as it existed before the start of construction operations except that where excavation is performed within areas designated for previous excavation or earthfill, the upper limit shall be the modified ground surface resulting from the specified previous excavation or earthfill.

b. The lower and lateral limits shall be the neat lines and grades shown on the drawings.

Method 3—The pay limits shall be defined as follows:

a. The upper limit shall be the original ground surface as it existed before the start of construction operations except that where excavation is performed within areas designated for previous excavation or earthfill, the upper limit shall be the modified ground surface resulting from the specified previous excavation or earthfill.

b. The lower and lateral limits shall be the true surface of the completed excavation as directed by the engineer.

Method 4—The pay limits shall be defined as follows:

a. The upper limit shall be the original ground surface as it existed before the start of construction operations except that where excavation is performed within areas designated for previous excavation or earthfill, the upper limit shall be the modified ground surface resulting from the specified previous excavation or earthfill.

b. The lower limit shall be at the bottom surface of the proposed structure.

c. The lateral limits shall be 18 inches outside of the outside surface of the proposed structure or shall be vertical planes 18 inches outside of and parallel to the footings, whichever gives the larger pay quantity, except as provided in d below.

d. For trapezoidal channel linings or similar structures that are to be supported upon the sides of the excavation without intervening forms, the lateral limits shall be at the underside of the proposed lining or structure.

e. For the purposes of the definitions in b, c, and d, above, any specified bedding or drainfill directly beneath or beside the structure will be considered to be a part of the structure.

All methods—The following provisions apply to all…