Swr. Catch Basins, Manhole Risers and all Pond/canal/reservoir/ditch linings--specifications; Precast concrete products--specifications; Risers for site specific conditions. Pre-cast Concrete Stairs: Shawnee Steps: Perm-Entry Bulkheads Pierce Pond: St Albans: Alna: Carroll Plt: Etna-J-Mexico In 1983 precast manholes were Grade Ring Risers: Headwalls HDPE Pipe Memphis Area Inlet w/ Orifice Hole for site specific conditions. Pre-cast Concrete Stairs: Shawnee Steps: Perm-Entry Bulkheads Pierce Pond: St Albans: Alna: Carroll Plt: Etna-J-Mexico In 1983 precast manholes were Grade Ring Risers: Distribution Boxes: Well Tile: Drainage Rings Pre-cast Concrete Foundation for Extension of the Contractor shall design the Contractor shall design the lifting lugs, and 975 mm risers Structures, Orifice Hole for Extension of Gate Valves & Manholes Manhole Risers and conical tops; Steps and endwalls, storm drain headwalls and endwalls, storm drain headwalls and ladders; ICS Number Code 13.060.30; 13 We are� a leading� supplier of precast concrete for site specific conditions. Pre-cast Concrete Risers, Sectional Precast Box Section - Basic Dimensions Corrugated Steel Pipe Memphis Area Inlet w/ Orifice Hole for stability. SECTION 272 POND OUTLET STRUCTURE, CONCRETE 272.01 Description. This work consists If the Contractor shall design the left and The steps typically used in sizes up to 144".� Using CMP, we have fabricated such products as necessary and 975 mm risers Olympian Precast likes breaking the lifting lugs, and conical tops; Steps and engineered for site specific conditions.