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Greg, Steve and Chad This is on regards to the culvert placements as a part of the proposed disc golf. Greg and Steve we can discuss this at our meeting today. We will also likely discuss this at our storm water meeting on Thursday. Any questions Let me know Thanks Nick Fleischhacker City of Mounds View -----Original Message----- From: Carl Almer [mailto:calmer@eorinc.com] Sent: Monday, October 22, 2007 1:21 PM To: Nick Fleischhacker Cc: Doug Thomas Subject: RE: City Of Mounds View Disc Golf Nick, The District conducted XP-SWMM modeling as part a 2002 EAW contemplating a regional pond within the area in question. I would anticipate the District could assist the city with modeling needs for the proposed crossings. In consideration of permitting for the proposed crossings, several issues would need to be addressed including: * Official ditch profile – The District adopted in 2006 the Official Profile for the Main Branch and Branch 2 of Anoka/Ramsey Judicial Ditch 1. The Official profile at proposed crossing locations may be as much as 1-foot below the existing ditch bottom. * Official ditch capacity – Design Criteria for the crossings would need to demonstrate no increase in flood elevations and convey anticipated flow rates (180±CFS) in a stable manner. * Floodplain impact – Plans would need to quantify fill below the FEMA flood elevation (901.0) and provisions for 1:1 compensatory storage would need to be provided. * Wetland impact – Plans would need to ID wetland, impacts (if any) and mitigation (as necessary per WCA). Given the significance of this drainage way, I would suggest that the City and District meet to discuss the project in more detail. Considering the potential design issues, it may be that footbridges should be an option for the City to consider. Also, while the District’s 2002 EAW was shelved, there may still be interest by the District in pursuing regional ponding at this location. I’ve copied the District Administrator, Doug Thomas, in this response so that he is aware of our discussions. Doug should be included in any potential meetings for this project. Feel free to call with any questions. Carl K. Almer Water Resources Engineer Emmons & Olivier Resources, Inc. 651 Hale Ave N, Oakdale, MN 55128 651.770.8448 651.203.6024 (direct) 651.770.2552 (fax) calmer@eorinc.com www.eorinc.com <file:///C:\Documents%20and%20Settings\calmer\Application%20Data\Microsoft\Signatures\www.eorinc.com> ________________________________ From: Nick Fleischhacker [mailto:nick.fleischhacker@ci.mounds-view.mn.us] Sent: Wednesday, October 17, 2007 2:16 PM To: Carl Almer Subject: City Of Mounds View Disc Golf Carl I contacted you a few weeks back regarding a proposed disc golf area in the City. As a part of this project several culverts will need to be installed. The City needs to determine whether modeling will be required as a part of this project. If simple hydrology calculations are all that's needed the city will likely apply for a permit from the watershed district. However, if expensive modeling is required we will likely explore other options. Attached is a map of the proposed culvert locations along JD 1. The proposed culvert locations are signified by a small water rapids symbol. Please note only the three northern most symbols are to be culverts, the southernmost symbol is proposed to be a bridge crossing. I hope form this map you can give you a good idea as to the extent of information the Watershed District will require when a permit is applied for. If you require any other information don't hesitate to e-mail or call me at 763-717-4063 Thanks Nick Fleischhacker City of Mounds View Public Works Department