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French Lake (FL) Subwatershed Imnrovements <br />Currently, no localized stormwater management improvement projects have been <br />identified for the French Lake (FR) subwatershed. Should any improvement sites be <br />identified in the future, this plan should be updated to include proposed sites. <br />Hadley Lake (HA) Subwatershed Improvements <br />HA -1. Chevy Chase Drive <br />Runoff draining along the north loop of Chevy Chase Drive flows to a low area at 132 <br />Chevy Chase Drive, then through a 12" RCP across the road without any treatment, <br />ultimately flowing to Hadley Lake in Plymouth, MN. Due to lack of conveyance <br />capacity along Chevy Chase Drive, surface flooding is observed in several yards during <br />larger rain events. In order to provide water quality, volume reduction, and storage <br />capacity improvement, rain gardens and storm sewer improvements should be <br />considered for this area. Retrofit rain gardens would treat stormwater runoff from a <br />previously untreated area of Orono, improving the quality of runoff reaching Hadley <br />Lake, and ultimately Minnehaha Creek. In addition, flooding potential would be <br />minimized due to improved conveyance infrastructure, increased storage capacity, and <br />volume reduction. <br />Prioritization: High <br />Estimated Cost: $69,148.75 <br />Project Partner(s): MCWD, Private Landowners <br />Funding Source(s): City, MCWD, Grant funding <br />Timeframe: Unknown <br />HA -2. Ferndale Green <br />Runoff from Ferndale Green drains along the edge of the pavement to an inlet in the <br />low area in the northwest corner of the intersection with North Ferndale Road without <br />any treatment, then through the storm system on Ferndale Road, and ultimately to <br />Hadley Lake in Plymouth, MN. Due to increased precipitation and lack of conveyance, <br />surface flooding is observed on the road during even smaller rain events. In order to <br />provide water quality, volume reduction, and storage capacity improvement, rain <br />gardens and storm sewer improvements should be considered for this area. Retrofit <br />rain gardens would treat stormwater runoff from a previously untreated area of Orono, <br />improving the quality of runoff reaching Hadley Lake, and ultimately Minnehaha <br />Creek. In addition, flooding potential would be minimized due to improved conveyance <br />infrastructure, increased storage capacity, and volume reduction. <br />Prioritization: Medium <br />Estimated Cost: Unknown <br />Project Partner(s): MCWD, Private Landowners <br />Funding Source(s): City, MCWD, Grant funding <br />Timeframe: Unknown <br />Laayette Bay (LF) Subwatershed Improvements <br />Currently, no localized stormwater management improvement projects have been <br />identified for the Lafayette Bay (LF) subwatershed. Should any improvement sites be <br />identified in the future, this plan should be updated to include proposed sites. <br />City of Orono <br />Surface Water Management Plan February 2019 39 <br />