City of Modesto Takes a Proactive Approach to Avoid Sanitary Sewer Spill in Dry Creek Constructing the Dry Creek / El Rio Sewer System

摘要

The City of Modesto realized the existing sewer line running along the east bank of Dry Creek was at "High Risk" for pipe failure due to creek erosion that could result in uncontrolled discharges, subsequent fines, and cleanup costs. The existing 6-inch line is more than 50 years old and was subject to constant erosion due to the frequent flooding in Dry Creek. The existing line was constructed through a riparian corridor with limited and/or no access for maintenance making it difficult to perform even routine monitoring of the pipe and bank condition. This paper will review the pre-design assumptions and the post construction lessons learned.