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HomeMy WebLinkAbout7.b. Vermillion River Watershed Update4ROSEMOUNTEXECUTIVE SUMMARY UTILITY COMMISSION Utility Commission Meeting: April 20, 2015 AGENDA ITEM: Vermillion River Watershed Update AGENDA SECTION: New Business PREPARED BY: Phil Olson, PE, Assistant City Engineer AGENDA NO. 7.b. ATTACHMENTS: Proposed Overflow Location Map APPROVED BY: RECOMMENDED ACTION: Discussion ISSUE Staff would like to provide an update on the City's coordination with Vermillion River Watershed District "WD) related to a storm water outlet from Rosemount. BACKGROUND WSB & Associates has been working with City staff and performing hydrologic studies to determine required discharges and logical discharge points to alleviate the potential for localized flooding in the 100 - Year 10 -Day Snowmelt event. In January, WSB informally submiitted a request to the VRWD Manager that outlined peak flow rates at 4 locations totaling 840 cfs for discharge into the VRWD during the above-mentioned peak event. Following discussions regarding the request, it was determined the next steps should be to coordinate a meeting between the watershed and city. In February, a meeting was held at City hall that included City staff, WSB, VRWD staff, and their consultant, Barr Engineering. Through those discussions it was determined that the next appropriate steps would be for Barr Engineering to incorporate Rosemount's hydrologic data into the VRWD overall watershed model to determine the downstream impacts of the requested discharges. It was agreed that the model would be based on the land use in 2005. In early March, WSB compiled the Rosemount hydrologic model for 2005 land use and submitted to the VRWD. Barr Engineering has been working to incorporate that information into the VRWD watershed model since that time. It was agreed in the February meeting that the next steps would be for the parties to meet in May to discuss the model outcomes and potential outlet opportunities. No meeting is set at this time. SUMMARY Jeff Sanberg with WSB & Associates will also be available at the Utility Commission meeting to discuss the history and current status of the City's coordination efforts with VRWD. gAutility commission\uc information\20150420 uc vermillion river watershed update.docx { zx ,. .�v, }; :r"7�' ,w a -+.. .♦ v;,7 `E,+ 'en'1 ;Z' ?•< r • i'i+.�-'" s' :�'1,:''''' 1:.;',', ♦i p1,; ik -.•it�.•,,',r Via.,a°' °�3. � «., �atof�`'•r �.•. , -fad+y t' ! - '�t✓� r. �*t�1�. ^ K.�'S�: • il � �'r"• X i�l A;`i Y Ys i .1'� s- a g i:: , .a.' 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