2019.02.04 CC Packet - Laserfiche WebLink

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4.3. Flooding and Stormwater Rate Control Concerns Problem 4.3.A Drainage issue has been noted at 124'h Street and Falcon Avenue due to wetland capacity reduction due to the overgrowth of cattails. Corrective Action 4.3.A When feasible, the City will work with local residents and within its drainage and utility easement to alleviate drainage issues in this area. Problem 4.3.13 JD #2 has caused intermittent flooding. Corrective Action 4.3.13 The City will continue its maintenance plan for JD #2 and work with the RCWD to alleviate this drainage issue. Problem 4.3.0 The City is aware of intermittent flooding from two small ponds which straddle July Avenue south of 122" d Street in the southeast portion of the City. These small ponds may be landlocked basins as City staff have been unable to locate an outlet. Corrective Action 4.3.0 City staff will work with Brown's Creek Watershed District to aid in the identification of the outlet of these small ponds as well as the replacement of the equalizer culvert running underneath July Avenue connecting the two ponds that is beginning to fail. 4.4. Flooding or Stormwater Rate Control Concerns between the City of Hugo and Adjoining Communities. Problem 4.4.A The current capacity of ACD 55 and ACD 72, both of which are clay tile systems constructed in the early 1900 for agricultural purposes, are insufficient to convey runoff within the developing urban landscape for the areas contributing to this system. A portion of the drainage that directs runoff to ACD 55 is located in the City of Hugo. Corrective Action 4.4. The City of Lino Lakes is in the process of developing a Comprehensive Stormwater Management Plan and will be constructing a municipal drainage system of higher capacity to address this need. The City of Hugo further understands that once constructed, the design of this system has incorporated enough capacity to convey runoff from the areas in the City of Hugo as a rate of 0.1 cfs/acre. The City of Hugo will continue to manage its flow rates into the City of Lino Lakes and to not exceed these rates in the future. The City further understands that until the outlet is in place and functional, any new and redevelopment in this area that requires a stormwater permit from the City of Hugo will not only need to meet the 0.1 cfs per acre peak rate control standard along with applicable treatment standards of the City and District, but will also need to provide measures as necessary to not allow any increase in the volume of runoff generated from the site. If the volume control provision is not met, a petition will be required for an outlet to this ditch system, per Minnesota Statute 103E.401, along with information demonstrating no adverse impact will occur as a result of this increase in runoff volume. 4.5. Impacts of Stormwater Management Practices on Recreational Opportunities Problem 4.5.A The City is aware that current management practices associated with Individual Sewage Treatment Systems around area lakes may impact recreational use of local water bodies. Corrective Action 4.5.A The City of Hugo has adopted the Washington County Subsurface Sewage Treatment System Regulation Ordinance. This ordinance is in compliance with the SECTION 4 ' . •