c.CSI_Specifications.pdf

SECTION 02110

CLEARING

PART 1 GENERAL

1.1 WORK INCLUDED

A. The work within this section consists of removing all trees, root balls, shrubs, brush, tall grass and similar vegetation as necessary to complete the Work.

PART 2 PRODUCTS

NONE

PART 3 EXECUTION

3.1 REQUIREMENTS

A. Remove all trees, shrubs, brush, tall grass, and similar vegetation located on the embankment and auxiliary spillway. Perform all clearing in a safe, prudent and lawful manner and only within the construction limits indicated on the Drawings and flagged on the ground.

Flagging on the ground takes precedence over any discrepancy between drawings and flagging. Dispose of all trees onsite as directed by the C.O. at no additional cost to the GOVERNMENT. Do not remove trees from the site without approval from the C.O.

END OF SECTION 02110

SECTION 02620

SITE CONSTRUCTION HDPE DRAIN PIPE SPECIFICATIONS

PART 1 GENERAL

1.1 SECTION INCLUDES

A. Furnishing and installing slotted and non-slotted high density polyethylene (HDPE) drain pipes in locations indicated on the Drawings, and cleaning and performing video inspection of drain pipes after installation.

1.2 REFERENCES

A. American Society for Testing and Materials International (ASTM)

1. ASTM D 2321 Underground Installation of Thermoplastic Pipe for Sewers and Other Gravity- Flow Applications

2. ASTM D 3350 Standard Specification for Polyethylene Plastics Pipe and Fittings Materials

3. ASTM F 477 Standard Specification for Elastomeric Seals (Gaskets) for Joining Plastic Pipe

4. ASTM F 2306 Standard Specification for 12 to 60 in. [300 to 1500 mm] Annular Corrugated Profile- Wall Polyethylene (PE) Pipe and Fittings for Gravity-Flow Storm Sewer and Subsurface Drainage Applications

5. ASTM F 2917 Standard Specification for 6 to 60 inch (150 to 1,500mm) Annular Corrugated Profile- Wall Polyethylene (PE) Pipe and Fittings for Gravity-Flow Storm Sewer and Subsurface Drainage Applications

1.3 SUBMITTALS

A. Material Certifications

1. Manufacturer’s certification that raw materials and pipe to be furnished meet the requirements of this Section. The certification shall state that pipe complies with these specifications based on complete tests which the manufacturer has conducted on the lot.

2. Product data for piping materials, fittings, and jointing methods; and recommended method of installation of pipe and construction of branches in pipe.

3. National Transportation Product Evaluation Program audit report indicating approval of specified pipe.

B. Rodent screen materials and details.

C. Installation Plan

1. Installation plan outlining the proposed plan for constructing drains shall be submitted to the Engineer for approval at least 14 days prior to the anticipated commencement of the Work.

Plan shall include a proposed schedule, proposed products to be used during installation, and measures that will be put in place to protect the work during construction. Contractor shall include in the plan measures to keep drain materials from becoming contaminated with soil, or other materials during stockpiling and construction activities.

1.4 QUALITY ASSURANCE

A. Pipe manufacturer shall be a participating member of the National Transportation Product Evaluation Program. Only products from suppliers whose manufacturing plant and polyethylene (PE) pipe products comply with this specification will be approved.

1.5 STORAGE AND HANDLING

A. Handle materials to ensure delivery to installation locations in sound undamaged condition.

B. Unload and handle thermoplastic pipe with reasonable care. Do not drop pipe, for pipes smaller than 18 inches in diameter manual handling is acceptable. For pipes larger than 36 inches in diameter, lift with a sling at two points spaced 10 feet apart. Do not use a loading boom or forklift directly on or inside the pipe.

C. Non-palletized pipe may be temporarily stockpiled on a flat, clear area. Stack pipe no higher than 6 feet.

D. Do not drag or strike pipe ends against anything.

E. Store and block pipe in a manner that prevents warping or distortion.

PART 2 PRODUCTS

2.1 DRAIN PIPE

A. HDPE Resin

1. HDPE pipe and fittings shall be manufactured from virgin resin. HDPE pipe and fittings manufactured from reclaimed or recycled resin will be rejected.

2. Virgin material for pipe and fitting production shall be HDPE conforming with the minimum requirements of cell classification 424420C for 4- through 10-inch diameters, or 435400C for 12- through 60-inch diameters, as defined and described in the latest version of ASTM D3350, except that carbon black content shall not exceed 4 percent (%).

B. HDPE Pipe

1. Furnish pipe in the nominal sizes shown on the Drawings.

2. Slotted pipe

a. AASHTO M252, Type SP pipe with corrugated exterior and smooth interior.

b. Perforations

1) AASHTO Class 2 slotted holes with a width of 0.125 inches.

2) Clean and completely free of burrs, cuttings, frayed edges, tears and cracks, and other defects.

3) Pipe not meeting these requirements will be rejected. Pipe is not allowed to be slotted in the field.

3. Solid pipe (Non-slotted)

a. AASHTO M252, Type S pipe with corrugated exterior and smooth interior.

4. Pipe Joints

a. Join pipes using a bell and spigot joint meeting AASHTO M252, AASHTO M294, ASTM F2306 or ASTM F2947.

b. Gaskets shall meet the requirements of ASTM F477. Gaskets shall be installed by the pipe manufacturer and covered with a removable wrap to ensure the gasket is free from debris. A joint lubricant supplied by the manufacturer shall be used on the gasket and bell during assembly.

5. Pipe and Connection Type by Area:

a. Toe drain outfall: Solid, water-tight.

b. Spillway foundation drains and toe drains: Perforated and solid, soil-tight.

C. HDPE Fittings

1. Suitable for use in perforated and solid corrugated drain pipe.

2. Manufactured for the diameter of pipe being connected.

3. Water–tight or soil-tight connections as specified herein.

D. Manufacturer and product:

1. Manufacturer: Advanced Drainage Systems (ADS)/Hancor.

2. Product: N-12 WT1B or ST1B, or equal as approved by the Engineer.

2.2 LOCKING CLEANOUT CAP AND STEEL PIPE

A. In accordance with Section 05500: Metal Fabrications.

2.3 TOE AND HEADWALL DRAIN OUTFALL RODENT SCREENS

A. HDPE Pipe Manufacturers standard Rodent Screen, or Fabricated Rodent Screen below, as approved by the Engineer.

B. Fabricated Rodent Screen

1. Stainless steel wire mesh, 12-gage wire, with ½ - inch by ½ - inch clear openings.

2. Screen attachment hardware to be approved stainless steel hardware.

3. Wrap screens around pipe ends and attach with stainless steel bands around pipe.

PART 3 EXECUTION

3.1 GENERAL INSTALLATION REQUIREMENTS

A. Install drain pipes in accordance with this Section, ASTM D 2321 and the manufacturer’s written installation instructions. In case of a conflict, this Specification shall govern.

B. Place fill materials carefully around the drainage pipe so as not to disturb the drainage pipe and to hold it securely in position while the overlying material is being placed.

C. Due to the polyethylene corrugated drainage pipe’s light weight and buoyancy, exercise special care in laying the drainage pipe and placing materials adjacent to the pipe to ensure that the pipe is laid in a manner to remain on grade and in alignment.

D. Method of laying the drainage pipe shall prevent stretching of the pipe during laying operations.

E. Install couplings with a close fit and in accordance with the manufacturer’s deflection tolerances.

Install in a manner that maintains alignment of the pipe, prevents separation of the joints, and maintains gasket integrity.

F. Remove and replace any drainage pipe which is broken, cracked, or otherwise unsuitable for use, as determined by the Engineer, at no cost to the Government.

G. Check interior of pipes before making connections. Keep the drainage pipe free from deposits of snow, ice, mud, sand, gravel, or other foreign matter and in good working condition for the duration of the Work.

H. Remove and replace damaged sections of pipe.

I. Use straight pipe sections and elbows not exceeding 22.5°. Provide a minimum length of 5 feet between angled connections to allow for camera inspection equipment access.

J. Do not drop drain materials directly on pipe.

K. Support drain pipe circumferentially with drain material prior to backfilling above pipe.

L. Do not compact drain material directly over the drain pipe.

M. Prevent introduction of contaminants in drain materials.

N. Install screens at pipe outfalls at locations shown on Drawings using approved attachment hardware in accordance with manufacturer’s recommendations and as approved by the Engineer.

3.2 FIELD INSPECTION AND TESTS

A. Do not bury, cover, or conceal piping until it has been inspected, tested and approved by the Engineer.

B. Deflection Test

1. The pipe shall evaluated to determine whether the internal diameter of the barrel has been reduced more than 5% of nominal internal diameter when measured not less than 30 days after installation. Deflection testing may be waived at the discretion of the Engineer if video inspection can demonstrate that deflection has not occurred.

2. Pipes shall be checked for deflection using a mandrel or any other device approved by the Engineer. The mandrel shall be a nine arm mandrel and shall be sized and inspected by the Engineer prior to testing. The mandrel shall be pulled through the pipe with a force not exceeding 1,000 pounds.

3. For locations where the pipe exceeds 5% of nominal internal diameter, an evaluation of the deflection shall be conducted by the Contractor and submitted to the Engineer for review. Pipe remediation or replacement is required for locations where the Engineer determines that the deflection may compromise the drain integrity. For pipe deflections greater than 7.5% of the nominal inside diameter, remediation or replacement of the pipe is required.

3.3 PROTECTION AND CLEANING

A. Do not allow traffic loads on pipe and structures until the pipe has been covered to a depth sufficient to prevent damage or breakage.

B. All drain pipes shall be clear and free from debris at the time of final acceptance.

END OF SECTION 02620