Attachment 1 APH - ACEP Const Mat Specs Sept 15-25.docx

Marion Area Office 502 Comfort Dr Suite E Marion, IL 62959

APH ACEP Easement Restoration Structural Measures Monroe County, Illinois

INDEX OF CONSTRUCTION SPECFICIATIONS

Spec # Description

8 Mobilization and Demobilization

2 Clearing and Grubbing

21 Excavation

23 Earthfill

45 Plastic Pipe

51 Corrugated Metal Pipe

6 Seeding, Sprigging, and Mulching

INDEX OF MATERIAL SPECFICIATIONS

552 Material Specification 552 – Aluminum Corrugated Pipe

547 Material Specification 547 - Plastic Pipe

NRCS-07/25

IL-APH ACEP-WRE Restoration Monroe County, Illinois

Construction Specification 8—Mobilization and Demobilization

1. Scope 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.

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 compensation 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 supplies.

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

IL-APH ACEP-WRE Restoration Monroe County, Illinois

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A. Bid Item #1, Mobilization and Demobilization

1. This item shall consist of the mobilization and demobilization of the contractor’s forces and equipment as well as all permitting, bonding, and insurance requirements necessary to perform the work required under this contract.

2. During all operations it will be the contractor’s responsibility to keep all public roads open and clear of debris and soil.

3. Access to portions of the work requires travel under a railroad trestle with a clearance of 14 feet wide by 11.5 feet high. All equipment access under the railroad trestle must follow the designated access easement.

4. All earthmoving equipment utilized for the work shall meet the requirements of OSHA, Paragraph 1926.602. In addition, roll-over protection and safety belts shall be installed, maintained, and utilized regardless of the equipment age or struck capacity. This includes earthmoving equipment as mentioned in Part 1926, Subpart 0, Sections 1926.602 and Subpart W, Sections 1000, 1001, and 1002, to include skid-steer and self-propelled compactor equipment.

5. Prior to commencement of construction, the contractor is responsible for contracting John Grab, COR, at 618-791-1436 a minimum of 48 hours before operations on-site begin. Alternate COR contact is David Webber, COR, at 618-998-6121 or Kenneth Rexing, Construction Inspector, at 618-998-6122.

6. All invoices submitted by the contractor shall be subject to the approval of the Contracting Officer.

7. The contractor shall perform the work in such a manner as to control erosion and minimize the production of sediments and other pollutants to the water and air during construction operations.

8. The contractor should take all precautions necessary to protect existing utilities, including proper notifications of the Illinois 1-call system.

9. Access to the construction area shall be as documented at the post-award meeting.

10. Payment for Bid Item #1, Mobilization and Demobilization shall be lump sum. Such payment shall constitute full compensation for all labor, equipment, materials, tools, and other items necessary to complete the work.

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Construction Specification 2—Clearing and Grubbing Scope The work consists of clearing and grubbing and disposal of trees, snags, logs, brush, stumps, shrubs, and rubbish from the designated areas.

Protection of Existing Vegetation

1. Protect trees and other vegetation designated to remain undisturbed from damage throughout the duration of the construction period. Any damages resulting from the contractor’s operations or neglect must be repaired by the contractor.

Earthfill, stockpiling of materials, vehicular parking, and excessive foot or vehicular traffic must not be allowed within the drip line of vegetation designated to remain in place. Vegetation damaged by any of these or similar actions must 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 must be carefully trimmed, and local nursery-accepted procedures must be 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 must 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 must have the ends smoothly cut perpendicular to the root. Roots exposed during excavation or other operations must be covered with moist earth or backfilled as soon as possible to prevent the roots from drying out.

Marking

1. The limits of the areas 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.

Clearing and Grubbing

1. Clear all trees not marked for preservation and all snags, logs, brush, stumps, shrubs, rubbish, and similar materials 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 must be grubbed out to a depth of at least 2 feet below the subgrade for concrete structures and 1 foot below the ground surface at embankment sites and other designated areas.

Disposal

1. Dispose of all materials cleared and grubbed from the designated areas at locations shown on the drawings or in a manner specified in Section G. The contractor is responsible for complying with all local rules and regulations and the payment of any fees that may result from disposal at locations away from the project site.

Measurement and Payment

1. Method 1.

For items of work for which specific unit 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 other items necessary and incidental to the completion of the work.

Method 2.

1. 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 other items necessary and incidental to the completion of the work.

Method 3.

1. 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 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 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 figure 2-1.

Figure 2-1 Size Designation for Tree Removal Measured Diameter (in) Size Designation (in)

The sum of such payments constitutes 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 constitutes full compensation for all labor, equipment, tools, and 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 constitutes full compensation for all labor, equipment, tools, and other items necessary and incidental to the completion of the work

5. 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 G.

Items of Work and Construction Details

i. This item shall consist of clearing and grubbing all trees, stumps, brush and debris from the area of the construction of earthfill dikes in Cell 1, 2 and 3 and other areas as required to complete the work.

ii. Disposal of materials shall be by stacking in the pool area of Cell 1, 2 and 3 and burning. Materials not able to be burned will be spread out not to exceed a height of 2 feet. The contractor is responsible for obtaining any required burn permits from the county and also observing any burn bans in effect.

iii. Measurement and payment method shall be by Method 4 – lump sum. Such payment shall constitute full compensation for all labor, equipment, tools, permits, oversight and other items required to accomplish the work.

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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.

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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 methods of measurement and payment.

Payment for each type and class of excavation is made at the contract unit price for that type and class of excavation. Such payment will constitute full compensation for all labor, materials, equipment, and all other items necessary and incidental to the performance of the work except that extra payment for backfilling overexcavation will be made in accordance with the following provisions.

Payment for backfilling overexcavation, as specified in section 8 of this specification, is made only if the excavation outside specified lines and grades is directed by the engineer to remove unsuitable material and if the unsuitable condition is not a result of the contractor's improper construction operations as determined by the engineer.

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 10 of this specification.

10. Items of work and construction details

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

A. Bid Item #3, Excavation, Cell 1 B. Bid Item #4, Excavation, Cell 2 C. Bid Item #5, Excavation, Cell 3

1. This item shall consist of excavation in order to remove the existing dikes to the lines on the drawing in order to construct the Wetland Berm to the depth and grade as shown on the plans. Measurement and payment for Bid Items #3-5 are as shown below.

a. Excavation of existing wetland berm, Cell 1 –740 cu yds

b. Excavation of existing wetland berm, Cell 2 & rework of berm between RR and Cell #2 – 2013 cu yds

c. Excavation of existing wetland berm and sections of existing cross berm as shown on the drawings, Cell 3 – 3,450 cu yds

2. All excavation in this contract is anticipated to meet the definition of common excavation as described in Section 2 of this specification.

3. The Contractor shall take great care to not over excavate beyond the specified maximum depth in the areas required for berm construction.

4. Use of excavated material shall be by Method 2.

5. Disposal of waste materials shall be by Method 1 – materials can be used to top dress the top 6 inches of the wetland berms before seeding.

6. The measurement and payment for Bid Item #3-5 – Excavation shall be by Method 2. No separate payment shall be made for this item. All compensation for all work, tools, and equipment shall fall under Bid Item 2, Earthfill.

D. Subsidiary Item, Excavation, Water Control Structures

a. This item shall consist of all excavation required to install the plastic pipe, aluminum pipe and corresponding water control structures and anti-seep collars as shown on the drawings.

b. No separate payment shall be made for this item. Payment for all labor, equipment, tools and materials necessary to complete the work shall be included in Bid Items 9 & 10 as applicable.

E. Subsidiary Item, Excavation, Beaver Tunnels

1. This item shall consist of all excavation required to prepare the two areas damaged by beaver tunnels in Wetland Berm 3, Cell 3 for earthfill as shown on the drawings.

2. No separate payment shall be made for this item. Payment for all labor, equipment, tools and materials necessary to complete the work shall be included in Bid Items 5.

Construction Specification 45 – Plastic Pipe

The work consists of furnishing and installing plastic pipe (except corrugated polyethylene pipe) and the necessary fittings and appurtenances as shown on the drawings or as specified herein.

Material

1. Pipe, fittings, and gaskets must conform to the requirements of Material Specification 547, Plastic Pipe, and as specified in Section N of this specification or as shown on the drawings.

Perforated pipe must conform to the requirements of Material Specification 547, Plastic Pipe, and as specified in Section N of this specification or as shown on the drawings.

Unless otherwise specified, concrete must conform to the requirements of Construction Specification 32, Structure Concrete, and Section H of this specification.

Unless otherwise specified, earth backfill must conform to the requirements of Construction Specification 23, Earthfill.

Unless otherwise specified, drainfill must conform to the requirements of Construction Specification 24, Drainfill.

Handling and Storage

1. Deliver pipe to the job site and handled by means that provide adequate support to the pipe and do not subject it to undue stresses or damage. When handling and placing plastic pipe, take care to prevent impact blows, abrasion damage, and gouging or cutting by metal edges, surfaces or rocks. The manufacturer’s special handling requirements must be strictly observed. Special care must be taken to avoid impact when the pipe must be handled at a temperature of 40 degrees Fahrenheit or less.

Store pipe on a relatively flat surface so that the barrels are evenly supported. Unless the pipe is specifically manufactured to withstand exposure to ultraviolet radiation, cover it with an opaque material when stored outdoors for 15 days or longer.

Excavation

1. Excavate in accordance with Construction Specification 21, Excavation, and Section N of this specification or as shown on the drawings.

Excavate the pipe foundation a minimum of 4 inches lower than the pipe grade shown on the drawings or staked in the field whenever bedrock, boulders, cobbles, or other material that may cause pipe damage is encountered at planned pipe grade.

Laying the Pipe

1. Install plastic pipe conduits complete with fittings and other related appurtenances to the lines and grades shown on the drawings or specified in Section N of this specification. Install the pipe so that there is no reversal of grade between joints unless otherwise shown on the drawings. The pipe must not be dropped or dumped on the bedding or into the pipe trench. The ground surface near the pipe trench must be free of loose rocks and stones greater than 1 inch in diameter. This ensures that rock will not be displaced and impact the pipe.

Just before placement, inspect each pipe section to ensure that all foreign material is removed from inside the pipe. The pipe ends and the couplings must be free of foreign material when assembled. At the completion of a work shift, all open ends of the pipeline must be temporarily closed off using a suitable cover or plug.

Take care to prevent distortion and damage during hot or cold weather. During unusually hot weather (daytime high temperature of more than 90 °F), lightly backfill the pipe assembled in the trench or shade to keep it as near to ground temperature as possible until final backfill is placed. Backfill operations must be performed during daily construction periods when the ground temperature and the temperature of the pipe do not vary more than 40 degrees Fahrenheit.

Install perforated pipe with the perforations down and oriented symmetrically about the vertical centerline. Perforations must be clear of any obstructions on the inside and outside of the pipe when the pipe is approved by the engineer for backfill.

During installation, firmly and uniformly bed the pipe throughout its entire length to the depth and in the manner specified in Section N of this specification or as shown on the drawings. Place bell-holes in bedding material under bells, couplings, and other fittings to ensure the pipe is uniformly supported throughout its entire length. Blocking or mounding beneath the pipe to bring the pipe to final grade is not permitted.

Pipe Embedment

1. Earth bedding.

Firmly and uniformly place the pipe on compacted earthfill bedding or an in-place earth material bedding of ample bearing strength to support the pipe without noticeable settlement. The earth material on which the pipe is placed must have uniform density to prevent differential settlement.

Unless otherwise specified, form a groove that closely conforms to the outside surface of the pipe in the bedding. The depth of the groove must be equal to or greater than 0.3 of the pipe diameter.

Compact earth bedding to a density not less than adjacent, undisturbed, in-place earth material or be compacted earth backfill. Earthfill material used for compacted earth bedding must be free of rocks or stones greater than 1 inch in diameter and earth clods greater than 2 inches in diameter. The pipe must be loaded sufficiently during the compaction of bedding under the haunches and around the sides of the pipe to prevent displacement from its final approved placement.

Sand, gravel, or crushed rock bedding. When sand, gravel, or crushed rock bedding is specified, firmly and uniformly place the pipe on the bedding material. Material for bedding must not exceed 1 inch in diameter. Unless otherwise specified in Section N of this specification or shown on the drawings, the coarse-grained bedding material must be carefully placed and compacted to a depth equal to or greater than 0.3 of the diameter of the pipe above the bottom of the pipe. The pipe must be loaded sufficiently during backfilling and compaction around the sides to prevent displacement of the pipe from its final approved placement.

Pipe encased in drainfill. Firmly and uniformly place the pipe on bedding of specified drainfill, which must be placed and compacted as specified in Section N of this specification or as shown on the drawings to form a continuous, uniform support around the entire circumference of the pipe. The pipe must be loaded sufficiently during backfilling around the sides and during compaction to prevent displacement of the pipe.

Backfill

1. Initial backfill.

1. Unless otherwise specified, initial backfill to 6 inches above the top of the conduit is required. Earth haunching and initial backfill material must consist of soil material free of rocks, stones, or hard clods more than 1 inch in diameter. Coarse backfill material must be the specified sand, gravel, crushed rock, or drainfill material.

Initial backfill must be placed in two stages. In the first stage (haunching), backfill is placed to the pipe spring line (center of pipe). In the second stage, it is placed to 6 inches above the top of the pipe.

The first stage material must be worked carefully under the haunches of the pipe to provide continuous support throughout the entire pipe length. The haunching backfill material must be placed in layers that have a maximum thickness of about 6 inches and are compacted as specified in Section N of this specification or as shown on the drawings. During compaction operations, care must be taken to ensure that the tamping or vibratory equipment does not come in contact with the pipe, and the pipe is not deformed or displaced.

When pressure testing is not specified, cover the pipe with a minimum of 6 inches of backfill material as soon as possible following assembly of the pipe in the trench but not later than within the same day that placement has occurred. When pressure testing is specified, place sufficient backfill material over the pipe to anchor the conduit against movement during pressure testing activities.

Final backfill.

1. Final backfill consists of placing the remaining material required to complete the backfill from the top of the initial backfill to the ground surface, including mounding at the top of the trench. Final backfill material within 2 feet of the top of the pipe must be free of debris or rocks larger than 3 inches nominal diameter. Coarse backfill material must be the specified sand, gravel, crushed rock, or drainfill. Final backfill must be placed in approximately uniform, compacted layers. Final backfill compaction requirements must be as specified in Section N of this specification or as shown on the drawings.

Vehicles or construction equipment must not be allowed to cross the pipe until the minimum earth cover and required density as specified in Section 14 of this specification have been obtained.

Pipe Encasement in Concrete

1. Concrete encasement must be carefully placed to form a continuous, uniform support around the entire circumference of the pipe as specified in Section N of this specification or as shown on the drawings. Pipes encased in concrete must be securely anchored to prevent movement of the pipe during concrete placement. A clear distance of 1.5 inch must be maintained between the pipe and the reinforcing steel.

The concrete for the encasement must conform to the requirements of Construction Specification 32, Structure Concrete, for Class 3000M concrete unless otherwise specified.

Joints

1. Unless otherwise specified in Section N of this specification or shown on the drawings, joints must be either bell-and-spigot types with elastomeric gaskets, coupling types, solvent cement bell and spigot, or jointed by butt heat fusion. When a lubricant is required to facilitate joint assembly, it must be a type having no deleterious effect on the gasket or pipe material.

Pipe joints must be watertight at the pressures specified except where unsealed joints are indicated.

Install pipe and join in accordance with the manufacturer’s recommendations. Laying deflections and joint fitting or stab depths must be within the manufacturer’s recommended tolerances.

When solvent cement joints are specified for PVC or ABS pipe and fittings, they must be made in accordance with the following ASTMs and the related appendix of each ASTM: D2855 for PVC pipe and fittings and D2235 for ABS pipe and fittings.

Flanged, banded, heat-fusion, or elastomeric-sealed mechanical joints must be used when joining polyethylene (PE) and high-density polyethylene (HDPE) pipe and fittings unless otherwise specified in Section N of this specification or as shown on the drawings.

Cut pipe ends square and debur to provide a uniform, smooth surface for the jointing process. Place reference marks on the spigot ends to assist in determining when proper seating depth has been achieved within the joint.

Fittings

1. Unless otherwise specified, steel fittings, valves, and bolted connections must be painted or coated as recommended by the manufacturer.

Fittings for non-pressure pipe must be of the same or similar material as the pipe and must provide the same durability, watertightness, and strength as the pipe unless otherwise specified.

Thrust Blocks and Anchors

1. When specified, install concrete thrust blocks and anchors as shown on the drawings or as specified in Section N of this specification.

The concrete for thrust blocks and anchors must conform to the requirements of Construction Specification 32, Structure Concrete, for Class 3000M concrete unless otherwise specified in Section N of this specification.

The thrust block cavity must be hand-dug into undisturbed soil or previously placed, compacted backfill. The cavity must be formed with soil or wood to hold the freshly placed concrete without displacement until an initial set has occurred.

When excavation beyond the designated trench widths and depths as shown on the drawings or specified in Section N of this specification occurs at locations where installation of concrete thrust blocks is required, the contractor must install an alternative thrust block provision. The concrete thrust block must have a thickness of one pipe diameter and a contact face area that must be formed against the pipe as shown on the drawings or as specified in Section N of this specification. Place backfill on all sides of the thrust block and to the sides of the excavation. It must be compacted as specified for initial backfill.

Pressure Testing

1. Method 1. Pressure testing of the completed conduit is not required.

Method 2. Test the conduit for leaks in the following manner:

1. Before pressure testing:

Joints of the assembled pipeline must be allowed to cure as recommended by the manufacturer.

Flush and clean the pipeline.

Place all concrete anchors and thrust blocks and allowed to cure for a minimum of 3 days.

Earth backfill must be sufficient to anchor the conduit against movement during the pressure testing and must be compacted as specified in Section N of this specification or as shown on the drawings.

The conduit must be braced, anchored, or both at each end to restrict all potential pipe movement.

Plug the ends of the conduit. The upstream plug must have a standpipe installed vertically with a minimum diameter of 2 inches and must be equipped with a shutoff valve. All high points in the line must be vented to evacuate air pockets. The conduit and the standpipe must be slowly filled with water so no air is entrapped during the filling operation. After filling is complete, all vents must be closed.

During pressure testing, the water level in the standpipe must be continuously maintained at a minimum of 10 feet above the highest invert elevation of the conduit for no less than 2 hours unless otherwise specified in Section N of this specification or as shown on the drawings.

1. The volume of water leakage in the 2-hour test period must be recorded. The maximum allowable leakage (L) in gallons per hour must not exceed 0.02 times the nominal pipe diameter (D) in inches for each 1,000 feet of pipeline, which is about 50 pipe joints (L = 0.02 x D).

When observed leakage exceeds the allowable amount, leaks must be sealed by replacement of pipe and fittings as necessary. The conduit must be retested as described above. This procedure must be repeated until the conduit leakage does not exceed the allowable volume specified above.

1. The contractor must be fully responsible for any and all work required to correct leakage exceeding the amount specified.

Method 3. Test the conduit for leaks in the following manner:

1. Before pressure testing:

1. Joints of the assembled pipeline must be allowed to cure as recommended by the manufacturer.

Flush and clean the pipeline.

All concrete anchor and thrust blocks must be in place and allowed to cure for at least 3 days.

Earth backfill must be sufficient to anchor the conduit against movement during the pressure testing and compacted as specified in Section N of this specification or as shown on the drawings.

The conduit must be braced or anchored at each end to prevent all potential pipe movement.

Plug the ends of the conduit and attach a pressure gauge to the upstream and downstream ends. All high points along the pipeline must be vented to permit the complete removal of all air within the pipeline. Slowly fill the conduit with water so no air is entrapped during the filling operations.

The testing pressure specified in Section N of this specification must be continuously maintained at the upstream gauge for a minimum of 2 hours. The pressure at the downstream gauge must not exceed the pressure rating of the pipe.

The volume of water leakage for the 2-hour test period must be recorded. Maximum allowable leakage must be in accordance with figure 45-1 or equation 45.1:

Figure 45-1 Allowable leakage for plastic pipe (gal/hr/1,000 feet, or 50 pipe joints) 1/

-----------------Allowable Leakage ------------------

1/ Computation basis

Eq: 45.1 where:

L = allowable leakage in gallons per hour N = number of joints (pipe and fittings) D = nominal diameter of pipe in inches P = test pressure in pounds per square inch When observed leakage exceeds the allowable volume, leaks must be sealed by replacement of pipe and fittings as necessary. The conduit must be retested as described in this section. The procedure must be repeated until the conduit leakage does not exceed the allowable amount specified above.

The contractor must be fully responsible for all work required to correct leakage exceeding the amount specified.

Measurement and Payment

1. Method 1. For items of work for which specific unit prices are established in the contract, the quantity of each kind, size, and class of pipe is determined to the nearest foot by measurement of the laid length along the crown centerline of the conduit. Payment for each kind, size, and class of pipe is made at the contract unit price for that kind, size, and class. Such payment constitutes full compensation for furnishing, transporting, and installing the pipe including excavation, shoring, backfill, bedding, thrust blocks, and all fittings, appurtenances, and other items necessary and incidental to the completion of the work. Payment for appurtenances listed separately in the bid schedule is made at the contract prices for those items.

Method 2. For items of work for which specific unit prices are established in the contract, the quantity of each kind, size, and class of pipe is determined as the sum of the nominal laying lengths of the sections used. Payment for each kind, size, and class of pipe is made at the contract unit price for the kind, size, and class. Such payment constitutes full compensation for furnishing, transporting, and installing the pipe including excavation, shoring, backfill, bedding, thrust blocks, and all fittings, appurtenances, and other items necessary and incidental to the completion of the work. Payment for appurtenances listed separately in the bid schedule is made at the contract prices for those items.

Method 3. For items of work for which specific unit prices are established in the contract, the quantity of each kind, size, and class of pipe is determined to the nearest foot by measurement of the laid length along the crown centerline of the conduit. Payment for each kind, size, and class of pipe is made at the contract unit price for the kind, size, and class. Such payment constitutes full compensation for furnishing, transporting, and installing the pipe including shoring, all fittings, thrust blocks, appurtenances, and other items necessary and incidental to the completion of the work. Payment for appurtenances listed separately in the bid schedule is made at the contract prices for those items.

Method 4. For items of work for which specific unit prices are established in the contract, the quantity of each kind, size, and class of pipe is determined as the sum of the nominal laying lengths of the pipe sections used. Payment for each kind, size, and class of pipe is made at the contract unit price for that kind, size, and class. Such payment constitutes full compensation for furnishing, transporting, and installing the pipe including shoring, all fittings, thrust blocks, appurtenances, and other items necessary and incidental to the completion of the work. Payment for appurtenances listed separately in the bid schedule is made at the contract prices for those items.

Methods 3 and 4. Excavation, backfill, and bedding are paid separately under their respective bid items.

All Measurement and Payment Methods. Compensation for any items 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 items to which they are made subsidiary are identified in Section N of this specification.

Items of Work and Construction Details

. Bid Item #9, Water Control Structures – Plastic Pipe – Wetland Cell 1 & 2

1. Bid Item #9 shall consist of placing 96 ft. and 75 ft of 10-inch diameter Schedule 40 PVC or SDR21 pipe as per Material Specification 547 and 2 each PVC 72” x 72” anti-seep collars or 2 each PVC 60” x 60” anti-seep collars at designated area with the depth and grade as shown on the drawings. Measurement and payment for Bid Item #9 are as shown below.

2. Bid Item #9 shall also consist of an inline stoplog water control structure for 10-inch diameter pipe, 3 ft height and 4 ft height (as shown on drawing), and 14-inch weir length with 10-inch animal guard and 10-inch heavy duty trash rack as shown on drawings.

3. The materials and manufacture of water control structures, pipe, and coupling bands, and other appurtenances must conform to the NRCS material specifications.

4. Place water control structure and pipe couplers on a stable base. The base may be compacted earth, compacted fill sand, or concrete pad. Extend the stable base no less than 1 foot around structure. Install structure with all stop boards in tracks. Place impervious backfill material around the structure and other appurtenances by hand and in layers not more than four (4) inches thick before compaction. Thoroughly compact each layer by means of hand tamping, to the same density requirements as specified for the adjacent embankment. Achieve proper compaction around structure without the use of mechanical compaction. Increase height of fill at approximately the same rate on all sides of the structure. Heavy equipment must not be operated within 6 feet of any structure. Lay the pipe to the lines, grades and elevations shown on the drawings and bed the pipe firmly and uniformly throughout the entire length. Install the pipe according to the manufacturer’s instructions. Select anti-seep collars composed of materials compatible with that of the pipe and install anti-seep collars so that they are watertight. Install pipe with the outside laps of circumferential joints pointing upstream and with longitudinal laps on the sides at approximately the vertical mid-height of the pipe. Join pipe sections with coupling bands or other approved methods, as shown on the construction drawings. All pipe connections must be watertight.

5. The measurement and payment methods listed above for this item shall not be used. Measurement and payment for Bid Item #9 will be by lump sum. Payment shall constitute reimbursement for all labor, materials, installation, tools and other items necessary to perform the work as described.

6. Items of work subsidiary to Bid Item 9 are shown in Construction Specifications 21 and 23, Excavation and Earthfill.

45-1

Construction Specification 51—Corrugated Metal Pipe

The work consists of furnishing and placing circular, arched, or elliptical corrugated metal pipe and the necessary fittings.

2. Material Pipe and fittings shall conform to the requirements of Material Specification 551, Coated Corrugated Steel Pipe, or Material Specification 552, Aluminum Corrugated Pipe, whichever is specified.

Unless otherwise specified in section 11 of this specification, perforated pipe furnished shall conform to the requirements for Class I perforations as described in ASTM A 760 or A 762.

3. Coupling bands and hardware Pipe joint coupling bands shall be provided meeting the requirements specified in section 11 of this specification.

Hardware consisting of coupling bands and band fastening devices, such as connecting bolts, rods, lugs, and angles used in conjunction with zinc-coated iron or steel pipe, shall be galvanized by the hot-dip method. Hardware used in conjunction with aluminum pipe and aluminum or aluminum-zinc alloy-coated iron and steel pipe shall be of the same material as the pipe except that hot-dip galvanized or cadmium- plated fasteners may be used. The surface of all band-fastening devices for pipe specified with bituminous or polymer coating shall be coated with asphalt-mastic material meeting the requirements of ASTM A 849. The coupling band shall be coated similar to that specified for the pipe unless otherwise specified in section 11 of this specification.

Coupling bands shall be installed to provide straight alignment of the connecting pipe ends. Unless otherwise specified in section 11 of this specification, the bandwidth shall be as specified in ASTM A 760 and A 762. The bands shall be positioned to overlap adjacent pipe ends equally. The coupling bands shall be corrugated to match the corrugations of the pipe section ends being connected.

4. Fabrication Fabrication of appurtenant sections shall be performed as shown on the drawings and described in section 11 of this specification. The items may consist of inlet sections, outlet sections, end sections, elbows, skew or beveled sections, rod reinforced ends, cut-off collars, or headwalls. Fabrication of these appurtenant sections shall be made from metallic-coated material identical to that from which the attached pipe is fabricated. Fabrication shall be of a quality and finished workmanship equal to that required for the pipe.

5. Handling the pipe The contractor shall furnish equipment as necessary to install the pipe without damaging the pipe or coating. The pipe shall be transported and handled in a manner to prevent damage to the pipe and coating.

6. Laying and bedding the pipe Unless otherwise specified, the pipe shall be installed in accordance with the manufacturer's recommendations. Pipe shall be installed so no reversal of grade between joints results unless otherwise

51-1 shown on the drawings. The pipe shall be installed with the outside laps of circumferential joints pointing upstream and with longitudinal laps at the sides near the vertical mid-height of the pipe.

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