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CES, Inc was retained by the Town of Milford in 2002 to conduct a feasibility study for an alternate pipe line route for the Town's main sanitary sewer line which discharges to the City of Old Town. The study was commissioned in part because of a pending Maine Department of Transportation (MDOT) bridge reconstruction project for the existing bridge which crosses the Penobscot River and links the Town of Milford with French Island and Old Town, Maine. As part of the feasibility study, approximately 10 different options were provided to the Town including a description of each proposed route, anticipated obstacles, a list of necessary permits, cost estimates and recommendations. The end result of the feasibility study was the selection of installing a new line across the proposed MDOT bridge. This option proved to be the least expensive to construct due to minimal changes with the existing sanitary sewer system.
Once the Town had selected the proposed route, CES, Inc. was retained to develop construction plans for the project. CES, Inc. worked closely with the Maine Department of Transportation utilizing survey data of the area already collected by MDOT. Between 2004 and 2006 CES, Inc. attended regular MDOT project planning meetings on behalf of the Town to review the project plans and to determine if on-going design changes would effect the installation of the proposed sewer. As a result the final plans were incorporated into the MDOT project and the proposed sewer line installation included as part of the bid process for the bridge.
In the Spring of 2006, MDOT moved forward with the bridge replacement project and the Town of Milford elected to incorporate the installation of the new sanitary sewer line within the MDOT project. The line includes a 15" PVC gravity sewer line on either side of the bridge approaches. The line across the bridge is an insulated 16" mechanical joint ductile iron pipe with expansion joints located on each end of the bridge. The pipe is supported with dual threaded rods which are connected to cross member diaphragms under the bridge deck. The pipe sits on rollers, allowing the pipe to move during expansion and contraction of the bridge throughout the year. The approximate length of pipe installation is 1,260 lineal feet of pipe, including the bridge work, plus 7 new manholes.
The next step in this phased construction project is to install a new sanitary flow system meter. The meter will be placed at the end of the system and will record discharge flows for billing purposes. The previous system had an inflow sensor which continually required maintenance and cleaning. The proposed system will sit above the flow and require less maintenance. The transfer of data will also occur above ground, reducing confined space entry.
The design and installation of this new main sewer line proved to be challenging due to the large amount of buried and overhead utilities in the area. Total cost of the sewer project is approximately $483,000.00.
Once the Town had selected the proposed route, CES, Inc. was retained to develop construction plans for the project. CES, Inc. worked closely with the Maine Department of Transportation utilizing survey data of the area already collected by MDOT. Between 2004 and 2006 CES, Inc. attended regular MDOT project planning meetings on behalf of the Town to review the project plans and to determine if on-going design changes would effect the installation of the proposed sewer. As a result the final plans were incorporated into the MDOT project and the proposed sewer line installation included as part of the bid process for the bridge.
In the Spring of 2006, MDOT moved forward with the bridge replacement project and the Town of Milford elected to incorporate the installation of the new sanitary sewer line within the MDOT project. The line includes a 15" PVC gravity sewer line on either side of the bridge approaches. The line across the bridge is an insulated 16" mechanical joint ductile iron pipe with expansion joints located on each end of the bridge. The pipe is supported with dual threaded rods which are connected to cross member diaphragms under the bridge deck. The pipe sits on rollers, allowing the pipe to move during expansion and contraction of the bridge throughout the year. The approximate length of pipe installation is 1,260 lineal feet of pipe, including the bridge work, plus 7 new manholes.
The next step in this phased construction project is to install a new sanitary flow system meter. The meter will be placed at the end of the system and will record discharge flows for billing purposes. The previous system had an inflow sensor which continually required maintenance and cleaning. The proposed system will sit above the flow and require less maintenance. The transfer of data will also occur above ground, reducing confined space entry.
The design and installation of this new main sewer line proved to be challenging due to the large amount of buried and overhead utilities in the area. Total cost of the sewer project is approximately $483,000.00.
Town of Milford | Feasbility Study for New Sanitary Sewer Main Intercept Line
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