MS4 Retrofit in Districts 3 & 4

The State of Connecticut Department of Transportation is soliciting bids for MS4 Retrofit projects in Districts 3 and 4. These projects involve the design, furnishing, and installation of underground stormwater infiltration systems, including chambers, end caps, manifolds, and sediment isolator rows. Additionally, the projects require the installation and maintenance of sediment control systems at catch basins, also known as SiltSacks, to prevent sediment from entering the stormwater drainage system. The scope also includes work related to modified riprap with grouting and wildflower establishment in various areas. Key components of the stormwater infiltration systems include products from StormTech, Contech Engineered Solutions, or Cultec, with specific requirements for stone backfill and geotextile materials. The sediment control systems must be commercially produced, UV-resistant, and capable of handling specific flow rates, with features like dump straps for emptying and lifting straps. The projects also detail requirements for special manholes, modified riprap with grouting, and wildflower establishment, including specific seed mixtures and establishment periods. Bidders must adhere to strict material specifications, construction methods, and quality control procedures outlined in the provided documents. The projects also involve extensive requirements for traffic control, environmental compliance, and adherence to prevailing wage laws.