2005-01-12 CC Packet - Laserfiche WebLink

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CSAH 14, I-35W to I-35E Water Resource Meeting Minutes -6- January 5, 2005 . Ponding is planned on the south side of CSAH 14 behind the Centerville City Hall. Clearwater Creek borders the southern portion of this property. The proposed design may avoid the creek floodway but requires further analysis. . Two ponds are planned east of County Road 54/CSAH 21 (20th Avenue) instead of one large pond because of the physical constraints of County Ditch 55, which runs north/south in this area. The Watershed District suggested SRF review the County Ditch 55 plans because the surface features may not reflect the subsurface tile locations. The following suggestions/clarifications were provided by the meeting participants with regard to Segment 2: . Watershed District prefers stormwater ponds to be sized for the entire drainage area if possible and not just the CSAH 14 right-of-way. Otherwise, off site areas should be routed around ponds in order to increase pond efficiencies. . Potential excess capacity in the development pond south ofCSAH 14 at Dupre Road should be reviewed. Watershed District has the plans from this 1995 pond project. · Difference between Phase II NPDES requirements and Watershed District requirements were briefly discussed recognizing the Phase II's emphasis on active pool treatment and the Watershed District's focus on dead pool treatment. · City ofCenterville noted that a 30-inch storm sewer line extends from the 1-35E SB/CSAH 14 EB ramp northeast to CSAH 14. The pipe is part ofMnlDOT's drainage system for the interchange. This will be reviewed by SRF. · SRF should obtain the Main Street Bank Plans (vicinity of County Ditch 55) from the Watershed District. 4. Floodplain ManagementlMitigation Following are the issues that were discussed by the meeting participants: · SRF described the existing versus proposed roadway profile and the changes that have been made with the proposed project to pull the roadway profile up out of the floodplain, particularly in Segment 1. . The proposed project may impact the Clearwater Creek f100dway at the Centerville City Hall. This will be researched further by SRF. · FIRM was last updated in 1982 for Lino Lakes and in 1999 for Centerville.