Specifications include, but are not limited to: The Town of Colchester is requesting proposals from engineering firms (Consultants) for design engineering services for the proposed Smith Creek Stormwater Improvements project in the Town of Colchester (the Town). This project consists of three project areas within the Smith Creek drainage area and will be funded through a combination of grants and local stormwater fees. The purpose of the Malletts Bay Stormwater Management System project is to reduce public roadway and private property damage due to inadequate management of stormwater from Town-owned roadways within watersheds draining to the easterly and southern shores of Inner Malletts Bay, and to reduce the volume of stormwater, sediment and phosphorus currently being discharged from roadways to Malletts Bay. The comprehensive suite of stormwater management strategies for Town-owned roadways will support Colchester’s Clean Water and Malletts Bay Initiatives and will leverage future transportation and utility-related infrastructure projects to protect and enhance water quality. Project needs, as defined by the Town of Colchester, project team members, and the public at the Local Concerns Meeting include: Insufficient roadway drainage infrastructure: Roadways and sidewalks have standing water following rain events or periods of snowmelt. Significant roadway deterioration has occurred as a result of poor drainage. Private properties in portions of the project area are negatively impacted by uncontrolled runoff from roadways during rain events. Excessive loadings of stormwater volume, sediment, and nutrients: During rainfall events, insufficient, aging, or missing stormwater management measures in the project area result in delivery of untreated or insufficiently treated runoff from roadways to tributary streams and to Inner Malletts Bay. Where runoff is channeled from roadways via ditches or closed drainage systems to streams without treatment, erosion and gullying results in transport of sediment into streams, and creates channel and streambank instability with additional transport of sediment and nutrients to Malletts Bay.
