Agenda - Council - 05/27/2003 - Laserfiche WebLink

Home

I I I I I I I I I I I I I I I I Comment 7.1.: Since all options assume discharge to the (Mississippi) River in one Corridor location or another (ex. page 17-17), and since there are recommendations, as well as text and figure references, for potential stormwater and wetland mitigation projects within the Mississippi River Critical Area CorridoffWSR/MNRRA, the City of Ramsey should also include a permit for "Environmental Permit Review and Approval as applicable for projects within the Mississippi River Critical Area Corridor/Wild and Scenic River District" in Table 8.1. Response: The applicable City of Ramsey permit, as required by the City of Ra~nsey Comprehensive Plan (as amended February 26th, 2002) for placement of a stormwater outfall within the Mississippi River Critical Area Corridor, will be obtained before work on the outfall structure is initiated. Comment 7.2: On page 9-2, paragraph 4, in the list of nearby envir0mnental resources, we suggest that the Mississippi River citation should also note that it is "designated a state Critical Area and Wild, Scenic and Recreational River". Response: The document has been changed to reflect the comment. Comment 7.3: The DNR strongly encourages the implementation of proposals mentioned to mitigate impacts associated with the storrnwater outfall to the Mississippi Rivet', including high use at multiple scales of on-site retention and infiltration into the project; minimization of scour, erosion and velocities; and directional boring, erosion control and native re-vegetation. The proposed stormwater out£all to the Mississippi River will likely require a Public Waters work permit. This discussion of response to impact mitigation fbr the outfall should also reference the mitigation to improve the water quality of runoff prior to discharge to the River. The DNR appreciates that proposed outlets for public waters wetland 2-670W (on-site) and Lake Itasca (off-site) will be above the ordinary high water levels and above the 100- year flood elevation for Lake Itasca. This will allow the natural storage of these basins to be utilized and permits for working in public waters will not be necessary'for these two outlets. Response: The City is currently working with the County to determine the route and character o:f the ultimate River discharge. Once these items are determined, the City can begin to work in earnest with the regulatory agencies to define the protection needed. Currently, as pointed out in Item 17 of the AUAR, there is no discharge from the RTC site to the Mississippi River. Revisions within Item 17 in the AUAR document and the added Appendix J discuss the means that are proposed to handle runoff from the RTC site under some new drainage area and outlet assumptions. Negotiations on outlet alignment/character and further consideration of outlet options continue. The discussion of the drainage system does not include details on. the specific B, MPs that will be introduced into each block as they are constructed. The AUAR document looked instead at the overall need to address drainage under high flow conditions, and route that water such that 34-7 -155-