Amend_2_-_Attach_5_-_33_40_00_Drainage_Systems_0002.pdf

DIVISION 33 – UTILITIES

SECTION 33 40 00 – DRAINAGE SYSTEMS

Klamath Falls N.F.H. 33 40 00 - 1 New National Fish Hatchery

PART 1 - GENERAL

1.01 DESCRIPTION OF WORK

A. The location and extent of the Drainage Systems work is indicated on the Drawings. The work includes the requirements for furnishing and installing pipes, structures, and flow control components for pond drainage, re-use drainage and storm drainage.

1.02 QUALITY ASSURANCE

A. Qualification of Workmen: Employ at least one person who shall be present at all times during execution of this portion of the work, shall have all portions of the Drawings and Specifications applicable to that portion of the contract, shall be thoroughly familiar with the type of materials being installed and the best methods for their installation, and shall direct all work performed under this Section.

B. Codes and Standards: The Contractor shall comply with the applicable provisions of all pertinent codes and regulations. References made herein for manufactured materials such as pipes, fittings, and specialties refer to designations for the latest edition of materials published by the American Association of State Highway and Transportation Officials (AASHTO), the American Society for Testing Materials (ASTM), the American Public Works Association (APWA) Standard Specification for Municipal Public Works Construction, and the Oregon Standard Specifications for Construction, 2021 edition.

1.03 SUBMITTALS

A. Submit the following in accordance with Section 01 33 00 – “Submittal Procedures” for the following products:

1. Manufacturer's literature on pipe and fitting materials.

2. Manufacturer’s certificates of compliance for pipe and fitting materials.

3. Manufacturer’s literature on the composite or metal castings for manholes, catch basins and cleanouts.

4. Manufacturer’s literature on sluice gates.

5. Certificates of compliance with AASHTO HS-25 load rating requirements for precast structures and covers, grates and frames.

6. Shop drawings for catch basins and manholes.

PART 2 - PRODUCTS

2.01 POND DRAINAGE PIPE

Klamath Falls N.F.H. 33 40 00 - 2

A. Pond drainage pipe shall be polyvinyl chloride (PVC) storm drainage pipe, couplings and fittings shall comply with ASTM D 3034 SDR 35 for pipe diameters less than or equal to 15 inches. PVC storm drainage pipe larger than 15 inch diameter shall conform to ASTM F679. PVC pipe shall have integral bell joints complying with ASTM D 3212 and gaskets conforming to ASTM F477.

2.02 RE-USE DRAINAGE (RUD) PIPE

A. Re-use drainage pipe shall be polyvinyl chloride (PVC) storm drainage pipe, couplings and fittings shall comply with ASTM D 3034 SDR 35 for pipe diameters less than or equal to 15 inches. PVC storm drainage pipe larger than 15 inch diameter shall conform to ASTM F679. PVC pipe shall have integral bell joints complying with ASTM D 3212 and gaskets conforming to ASTM F477.

2.03 STORM DRAINAGE PIPE

A. Corrugated Polyethylene Pipe (CPEP) with diameters less than or equal to 30 inches shall be smooth interior annular exterior corrugations and shall meet or exceed the specifications of ASTM F2736 and AASHTO MP-21. CPEP with diameter greater than 30 inches shall have smooth interior and annular exterior corrugations and shall meet or exceed the specifications of ASTM F2881 and AASHTO MP-21. Polypropylene shall be an impact modified copolymer.

B. Polyvinyl chloride (PVC) storm drainage pipe, couplings and fittings shall comply with ASTM D 3034 SDR 35 for pipe diameters less than or equal to 15 inches.

PVC storm drainage pipe larger than 15 inch diameter shall conform to ASTM F679. PVC pipe shall have integral bell joints complying with ASTM D 3212 and gaskets conforming to ASTM F477.

C. Subdrain pipe shall be perforated high density polyethylene (HDPE) pipe with circular perforations conforming to the requirements of AASHTO M252/M294, Class 2.

D. Reinforced Concrete Pipe (RCP) shall be used at points noted on the Drawings.

RCP shall comply with ASTM C-76 for reinforced concrete storm drain pipe, Class III. Joints shall be rubber gasketed, conforming to ASTM C443.

2.04 RE-USE STRUCTURE

A. Re-use structures shall be 18-inch or 24-inch diameter rigid polyvinyl chloride drainage structures rated for HS-20 traffic loading and conforming the requirements of ASTM F1336, ASTM D3034 and ASTM F679.

B. Re-use structures shall have flexible elastomeric seals conforming to ASTM F477.

C. Polyvinyl chloride material shall conform to ASTM D1784 cell class 12454.

2.05 RE-USE STRUCTURE COVER

Klamath Falls N.F.H. 33 40 00 - 3

A. Re-use structure covers shall be composite, sealed flat lids with integrated central inspection port and matching composite frame, Fibrelite or approved equal.

B. Structure covers shall be rated for HS-20 traffic loading and frame shall be embedded in reinforced concrete collar not less than 12 inches thick and 20 inches wide on all sides of the frame.

C. Structure frames shall be positioned such that lid will be 1/2 inch higher than surrounding grade, reinforced concrete collar shall be sloped with a crown to match top of lid and surrounding grade.

2.06 MANHOLES AND CATCH BASINS

A. Catch Basins shall be of precast concrete and shall be made up from the components indicated on the Drawings and shall conform to the Oregon Department of Transportation Standard Specifications for Construction, most recent edition for dimensions and functionality.

B. Metal frame and grate or cover for catch basins and manholes shall be ductile iron of the size and style indicated on the Drawings.

C. All manholes and catch basins shall be furnished with flexible boot pipe connectors designed for the size of pipe that will be connected. Flexible boot pipe connectors shall conform to ASTM C923, Kor-N-Seal or approved equal.

D. Ladders and other steel components and hardware shall be coated with HDPE.

E. Mortar shall be mixed 1:1; Type I cement and sand.

2.07 PIPE COUPLING

A. Pipe couplings for joining new pipe to existing pipe shall conform to the performance requirements of ASTM C 1173 and shall include a PVC gasket, stainless steel clamps and stainless steel shear ring. Gasket shall conform to ASTM D 5926 with a minimum tensile strength of 1000 psi and minimum elongation at rupture of 250 percent. Shear ring shall be designed to resist heavy earth loads and shear forces, and retain pipe alignment. Shear ring shall be stainless steel, 0.012 inch or greater thickness.

2.08 SLUICE GATES

A. Sluice gates shall be constructed from stainless steel and shall conform to AWWA C561 and NSF 61 / NSF 372. Sluice gates shall be constructed with ultra high molecular weight (UHMW) polyethyelene sliding and seating surfaces.

Sluice gate anchor bolts shall be stainless steel. Sluice gates shall be Waterman SS-250 or approved equal.

B. Sluice gates shall be self contained and slab mounted or wall thimble mounted and pipe flange mounted, where noted, with hand crank actuator. Contractor shall procure thimbles for slide gates prior to casting or fabrication of concrete

Klamath Falls N.F.H. 33 40 00 - 4 structures so that thimbles can be cast into the walls of the water control structures. Exterior face of wall thimbles shall be configured for flange mounting.

C. Sluice gate frames, cover slides, wall thimbles, stems, stem guides, wall brackets, fasteners and all other metals components shall be stainless steel, Type 316L.

2.09 RE-USE DRAIN VALVES

A. Resilient seat gate valves, ANSI/AWWA C509, rated for 200 psi. Counter clockwise opening with ductile iron, epoxy coated body and flanged or mechanical joint ends.

B. Valves shall have non-rising, high strength bronze stem and O-ring stem seal.

C. Body-bonnet connections shall be bolted with corrosion resistant materials.

D. Manual operator: hand wheel for valves in structures, 2-inch square operating nut for buried or valve box installation.

E. Manufacturer: M&H Valve Model C509/C515, Clow Valve Model 2639/2640, American Flow Control Series 2500, or approved equal.

PART 3 - EXECUTION

3.01 GENERAL

A. It shall be the Contractor’s responsibility to verify the actual locations (horizontal and vertical) of all utilities prior to beginning trench excavation. If utilities are to remain in place, provide protection from damage during construction operations.

3.02 EARTHWORK

A. Excavation, bedding, and backfilling shall be as specified in Section 31 00 00, Earthwork, of these Specifications.

3.03 SURVEYS

A. Layout of alignment and grade of site drainage piping shall be established by a Land Surveyor State licensed in Oregon. Check the line and grade during installation to ensure that the Work is within the following allowable tolerances:

1. Fine-grade and prepare bedding so the pipe can be initially placed with a variation from true line or grade, measured at each joint, of not more than 1/32 inch per inch diameter or 1/2 inch maximum, provided that:

a. A resulting level or backsloping length of pipe does not occur; and

b. No more than one-half of the permissible variation shall be accumulated between successive joints.

Klamath Falls N.F.H. 33 40 00 - 5

c. Pipe laid within these tolerances shall not be subjected to any further adjustment. Measurement for grade shall be taken at the pipe invert, NOT TOP OF PIPE. Eccentricity of pipe barrels, with respect to jointing surfaces, shall not produce grade interruption adverse to flow of more than 1/4 inch maximum.

3.04 INSTALLATION OF UNDERGROUND PIPE

A. Contractor shall hold a pre-construction conference onsite with culvert manufacturer and Engineer a minimum of 2 weeks prior to beginning culvert installation.

B. Furnish all necessary machinery for the work and pump, bail, or otherwise remove any water which accumulates in the trench. Perform all work necessary to keep the trench clear of water while the foundation and the masonry are being constructed or the pipe is being laid.

C. Placing: Place the pipe from downstream to upstream with the bells pointing upstream in appropriate bedding graded to conform with the grades and alignment indicated on the Drawings and prepared as specified. Ensure that the pipe has a full, solid bearing along its entire length. Provide small depressions for pipe bells when utilized. Make minor adjustments to line and grade by scraping away, or filling in with, bedding material. Do not support pipes on blocks or mounds of any nature.

D. Jointing: Take care to properly align the pipe and clean the bell and spigot or tongue of the pipe. Gaskets must be straight, properly lubricated and without twist. The pipe shall be partially supported by hand, sling, or crane, as required, to minimize lateral pressure on the gasket and to maintain concentricity until the pipe has been forced into final longitudinal position in accordance with the manufacturer's recommendations. Pipe handling, after the gasket has been affixed, shall be carefully controlled to avoid bumping the gasket and, thus, knocking it out of position or loading it with dirt or other foreign material. Gaskets so disturbed shall be removed, cleaned, relubricated and replaced before the joint is attempted.

E. Apply sufficient restraint to the line to ensure that the joints, once home, are held so by tamping fill material under and alongside the pipe. At the end of the day's work, block the last pipe in such a manner as may be required to prevent creep during down time.

3.05 INSTALLATION OF SLUICE GATES

A. Install sluice gates in accordance with manufacturer’s recommendations.

B. Procure wall thimbles for sluice gates sufficiently prior to fabrication or construction of water control structures to allow the thimbles to be cast into the wall of water control structures.

3.06 INSTALLATION OF MANHOLES AND CATCH BASINS

Klamath Falls N.F.H. 33 40 00 - 6

A. Furnish all necessary labor, materials, or equipment to pump, bail, or otherwise dewater the trench or pit for the duration of the construction and backfill period.

B. Manholes/Catch Basins

1. Place manholes/catch basins at the elevation and location indicated on the Drawings upon the appropriate bedding prepared in accordance with Section 31 00 00 – “Earthwork”.

2. Carefully place precast manholes/catch basins on the riprap and aggregate base material as indicated on the Drawings so as to be fully and uniformly supported in true alignment, making sure that all entering pipes can be inserted on proper grade.

3. All lift holes and all joints between precast elements shall be thoroughly wetted and then completely filled with mortar, smoothed and point both inside and out, to ensure watertightness.

4. Place precast sections and align to provide vertical sides and vertical alignment of the ladder rungs. The completed catch basin shall be rigid, true to dimensions and watertight.

5. In precast manhole/catch basin sections where steel loops have been provided in lieu of lift holes, remove the loops flush with the inside wall surface after the catch basin has been completed. No sharp cutoff protrusions will be permitted. If concrete spalling occurs as a result of the loop removal, restore the spalled area with mortar to a uniformly smooth surface.

C. Grade Adjustment: The manhole/catch basin casting frame or casting ring may be either cast into a concrete collar or set flange down on pre-cast concrete adjustment rings and mortared, as directed by the Engineer. Casting frames or rings for structures located within roadways or paved surfaces shall not be grouted to final grade until the final elevation of the pavement or road surfacing in which it is to be placed has been established and permission has been given by the Engineer to grout the casting in place. Provide not less than eight inches or more than 16 inches between the top of the cone or slab and the underside of the manhole casting ring for adjustment of the casting ring to grade. Bricks for grade adjustment shall not be used. Location of manholes/catch basins will be staked by the Contractor.

D. Pipe Connections: Place all pipes entering or leaving the structure on firmly compacted bedding, particularly within the area of the structure excavation, which normally is deeper that that of the sewer trench. All openings in the walls of catch basins constructed with precast sections for the insertion of pipe connections and outlet trap castings shall, after pipe or castings have been placed to their final position, be grouted tight in place to present a smooth uniform surface inside and outside. Pipe placed through walls to which connections will be made shall be so placed that the socket end of the pipe is backed against the outside surface of the catch basin as closely as practicable

Klamath Falls N.F.H. 33 40 00 - 7 for the angle of entrance. The spigot end of the pipe shall be cut square with the last point of contact with the inside wall surface. Provide flexible joints within 12 inches of the catch basin structure.

E. Backfill: Hand-place backfill around the manhole, extending at least one pipe length into each trench and tamp with selected material up to an elevation of six inches above the crown of all entering pipes. Conform to the applicable provisions of Section 31 00 00 – “Earthwork”.

3.07 INSTALLATION OF RE-USE STRUCTURES

A. Complete installation of re-use structures and re-use structure covers in accordance with the manufacturer’s recommendations.

B. Position re-use structure covers within concrete collar embedment such that cover frame is fully embedded in concrete around the full perimeter of the frame.

C. Ensure that there is a gap of 1/8-inch to 3/8-inch between the bottom of the concrete cover frame collar and the top of the PVC re-use structure body.

3.08 ACCEPTANCE TESTING

A. After completion of the following, authorization from the Engineer shall be required before the Contractor can perform acceptance testing:

1. Acceptable placement of applicable pipe, bedding, and backfill material.

2. Acceptable completion of all applicable manhole channels and grout work.

3. Acceptable debris removal, cleaning, and flushing of all applicable pipes and structures.

B. Contractor shall perform a hydrostatic or low-pressure air test as required by Section 00445.72 Pipe Testing of the Oregon Department of Transportation, Oregon Standard Specifications for Construction, 2021 Edition. Infiltration Testing shall be required where the pipe is installed below the ground water table.

C. Before final acceptance, the Contractor shall inspect all drainage lines by the use of a television camera, utilizing an Owner approved independent inspection service company. The television inspection requirements shall include the provisions of:

1. A color analog/digital camera with pan and tilt capacity in order to view all main lines, lateral lines, and structures including channels.

2. A dye solution to be introduced in sufficient quantity to travel from the structure that is the highest point of inspection to the downstream terminus of the inspection limits. Red or purple dye shall be used for PVC pipe and green dye for ductile iron and concrete pipe.

Klamath Falls N.F.H. 33 40 00 - 8

3. A one-inch reference ball to be mounted to the camera in order to drag along the bottom of the pipe during the entire inspection procedure.

4. Linear measure references to be measured from the center of the beginning structure to the center of the next inline structure and include the direction of flow. The locations of lateral pipes and all distinctive pipe conditions shall be referenced to the centerline of the beginning structure.

All structure references shall utilize the designated structure reference numbers shown on the plans.

D. The following television inspection information shall be provided to the Engineer:

1. A clear movie format on DVD which encompasses the limits of the inspection area and including all reference data as described herein. A tape reference time and date for the start of each run shall also be indicated.

2. A written report shall be provided corresponding to the taped inspection and including all reference data as described herein. The report shall consist of a written narrative of all distinctive pipe conditions including ponding areas in excess of ¼ inch.

END OF SECTION