Repair and Extension of an Existing Storm Sewer Outfall

Description: Extend the existing 12" storm sewer approx. 20 LF toward the creek. Provide a watertight and structurally sound connection to the existing 12" corrugated steel storm sewer pipe with a double-wall HDPE storm sewer pipe (A-2000 or approved equivalent); Backfill the eroded area surrounding the pipe with suitable crushed stone and compact as necessary to restore grades; Install erosion protection at the outlet using RR6 riprap or equivalent large rock to minimize future scour and erosion; Site shall be graded and hydroseeded to a neat and stable condition upon completion.