R2026-136 Resolution Authorizing Lake Decatur Watershed Farmland Conservation Program Agreement With Lynn Clarkson for a Bioreactor Drainage Water Treatment Structure

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Water Control Structure and Pipe The materials and manufacture of the water control structure,pipe,anti-seep collars,coupling bands, coatings,and other appurtenances must be as shown on the construction plans and conform to the NRCS material specifications in the approved design.The following reference specifications pertain to conduit materials currently acceptable for use with this practice: REFERENCE SPECIFICATIONS FOR CONDUIT MATERIALS Description ASTM Plastic Corrugated Polyethylene(PE)Pipe and Fittings F667 Poly Vinyl Chloride(PVC)Pipe and Fittings F949,D1785,D2241 Styrene-Rubber(SR)Plastic Drain Pipe and Fittings D2852 Dual Wall Polyethylene Pipe Corrugated Polyethylene(PE)Pipe and Fittings F2306,F2648,F667 Elastomeric Seals and Joints (Gaskets) D3212 Clay Clay Drain Tile and Pipe IC4,C700,C301 Concrete Concrete Drain Tile and PipeC412,C118,C14,C76,C444 Test Methods for Concrete Pipe C497 Portland Cement C150 Metal Corrugated Aluminum Pipe B745 Corrugated Steel Pipe A760 Place the water control structure and pipe couplers on a stable base. The stable base may be compacted earth,compacted fill sand,or concrete pad. Extend the stable base no less than 1 foot around the structure. Install structure with all stop boards in tracks. Place impervious backfill material around the structure and appurtenances by hand and in layers not more than 6 inches thick before compaction. Thoroughly compact each layer,by means of hand tamping,to the same density as the surrounding materials. Achieve proper compaction without the use of mechanical compaction.Increase height of fill at approximately the same rate on all sides of the structure. Lay the pipe to the line,grade and elevations shown on the drawings and firmly and uniformly bed the pipe throughout its entire length. Use hand tamping methods around pipes that are within 20 feet of the water control structure Beyond that distance,the pipe may be laid with a tile plow or trencher designed for proper bedding of the pipe,and the disturbed soil allowed to naturally subside back into place. Outlet Where the construction plans call for a free outlet,use a continuous section of non-perforated conduit at the outlet,unless a headwall is used. All outlets must have an animal guard,installed to allow passage of debris. The continuous section of non-perforated conduit must be long enough to satisfy all requirements of Conservation Practice Standard 606-Subsurface Drain: • Al least two-thirds of the pipe must be buried in the ditch bank. • The cantilever section must extend to the toe of the ditch side slope or to the side slope protected from erosion. NRCS,IL SPECIFICATION-Page 2 of 4 April 2021 own CLARKSON CEMETERY 200-BIO 12 "oe'Ep"""" 004127ae ~Mr Mree�wn oW+/9me *S4. 1'I'1 I \1.111111x;1' 01410=3 IN • 1.,1u1ng c,,,,,.„n„, L NRCS 605 PRACTICE SPECFICAT1ON /MOM VI