Subdrain, Plastic Pipe, 12" Diameter (Please provide PER FOOT pricing): These items shall be non-perforated, dual wall, HDPE pipe and comply with Section 4146. Removal and disposal of existing subdrain tile and other accessories shall be incidental to these items. All fittings required to make connections or angles shall be included. Contractor shall note that not all subdrain items may be used but are included in case any one of these diameters are encountered. It is anticipated that work will include a 10" and 12" size subdrain pipe but sizes will need to be verified in the field. Payment will be per foot and will include pipe, fittings, collars, and all other materials necessary to complete the connections. (Response required) Quantity: 100 UOM: Foot; Steel Encasement for Subdrain Tile, Trenchless, 15" Diameter (Please provide PER FOOT pricing): Item is for boring a 15" steel encasement across IA 150 to house the subdrain tile. Steel encasement shall be a minimum 1/4" wall thickness. Installation will be in accordance to Standard Road Plan DR-302. Item shall include all costs to install steel encasement including encasement pipe, jacking pit, boring, labor and any other materials required to provide encasement. Method of Measurement: Iowa DOT will measure the length of encasement installed to the nearest foot. Basis of Payment: Payment to contractor shall be based on the contract unit price per foot of encasement installed. (Response required) Quantity: 100 UOM: Foot...
