Specifications include, but are not limited to: The Lang Impoundment Rehabilitation Project consists of improvements to the existing Lang Impoundment perimeter dike from Station 0+00 to Sta. 40+95 as shown on the plans. Fill for construction will be provided from offsite borrow sources to be determined by the Contractor and approved by the Engineer. The base bid dike construction template will provide for a dike with a crown width of 20’ and a crown elevation of 8.5’ NAVD 88 from Sta. 0+00 to Sta. 25+00, transition to a crown elevation of 7.0’ between Sta. 25+00 and Sta. 27+00, and a crown elevation of 7.0’ between Sta. 27+00 and Sta. 40+50. From Sta. 40+50 to Sta. 40+95, the dike crown will transition to meet the existing Rte. 9 grade. Interior side slopes will be constructed on a 1V:3H angle. Exterior side slopes will be constructed on a 1V:2.5H angle to tie into existing grade where required. The base bid will also include installation of a cofferdam surrounding the water control structure on the Delaware River side and a dewatering system to provide for the inspection of the subaqueous elements of the structure, replacing the water control structure, installing chain link fence, and seeding and mulching all dike slopes as shown on the drawings for the Lang Impoundment.
