City of Manistee Sanitary Sewer Lining Project

Spicer Group assisted Manistee with designing improvements to its sanitary sewer collection system which experienced significant storm water inflow and groundwater infiltration during precipitation events. Spicer Group facilitated an extensive flow metering effort, and the sanitary sewer system was divided strategically into 12 distinct flow metering districts. The data was analyzed using EPA Sanitary Sewer Overflow Analysis and Planning Toolbox and the hydraulic modeling was performed in Autodesk Sanitary Analysis (SSA) software.

While studying the City’s system, Spicer Group discovered there was an excess amount of stormwater infiltration meaning the City was conveying stormwater to the wastewater treatment plant and treating water that did not need to be treated and contributed to the overflow issues. To eliminate this infiltration and inflow into the system, the City applied received a loan from the U.S. Rural Development Fund to use cured-in-place pipe and manhole lining. Spicer Group was responsible for the preparation of plans and construction inspection of all cured-in-place pipe lining tasks including: approximately 5.6 miles of existing 6-inch to 30-inch diameter sanitary sewer, sanitary sewer repairs, miscellaneous trenchless sewer spot repairs, viewing and inspecting closed circuit televising (CCTV) of existing sanitary sewer, 90 cured-in-place manhole lining (CIPM), replacement of 66 manhole castings, creating construction maps in GIS for the contractor to use as reference for convenience, assisting design of approximately 3,700 feet of road reconstruction, installing new storm sewer ranging from 12 to 24-inch diameter, and replacing existing water main with 8-inch watermain.