FISH CREEK SANITARY SEWER TRUNK
Since 1999, Stephl Engineering has completedCCTV camera condition assessments and designed repairs on the 19,000 LF Fish Creek Sanitary Sewer Trunk pipe for the Anchorage Water and Wastewater Utility. The 50-year-old 24 to 36-inch corrugated metal (CMP) sanitary sewer pipe was found to have many problems but was not in as poor of shape or as badly corroded as was described in earlier engineering studies. In the last 17 years Stephl has designed upgrades to this trunk sewer using technologies such as sliplining with HDPE pipe, annular space grouting, CIPP lining, open cut and replacement, realignment, sewer flow bypassing and manhole rehabilitation. Most of the pipe was located along a creek, near the railroad tracks, or in the tidal zone of Cook Inlet and required the use of sheet pile shoring and creek diversions and restoration to complete the improvements.