Professional Services for Water Rerouting

Work will involve the study of the existing drainage systems between the Hwy. 501 and 8th Ave North, Cedar Street corridors and the Hwy. 501, Alder Street and Balsam Street corridors. The project will include the installation of appropriately sized drainage pipes, culvert boxes, headwalls and outfall structures. The design of a large retention pond will also be part of this project. Water distribution lines and sanitary sewer with in this drainage area should be reviewed as well to see how they interact with the project. Work for this project includes phase 1, which is the further study and surveying of the Page 1 of 5 existing system. Anticipated project work includes the upsizing of storm piping, running additional storm piping (for capacity), upgrading storm structures to accept dual storm pipes, regrading a section of ditch line, and the addition of a retention basin to attenuate flows. Two of the pipes upgraded are being replaced with 6' x 4' box culverts. The 501 improvements show remedy of much of the flooding on the 10 year storm event and a significant improvement on the 100 year event. Hwy 501: Recurrent flooding of US Highway 501 necessitates the proposed Hwy 501 Drainage Improvement Project. This project includes replacing several undersized stormwater pipes with appropriately sized reinforced concrete pipes and a 6' x 4' and 8' x 4' box culvert. This project also includes an optional proposed retention pond for additional storage capacity. If the retention pond is included, the box culverts can be replaced with a 36" and 48" reinforced concrete pipe respectively.