2001-01-04_AgendaPacket - Laserfiche WebLink

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The GLWMO plan includes a map of the major subwatersheds. The map is a good start at providing the necessary hydrologic information.. Minnesota Rules Chapter 8410.0060, subp. 4e, requires either the watershed plan or the local water plans to include additional pertinent information such as the existing stormwater ponds, outfall locations, storage areas, and the direction of flow through the system. The GLWMO plan states that this information is included in the local water plans for Roseville and Shoreview. . Minnesota Rules Chapter 8410 requires the watershed plan to include information on 100-year flood levels and peak discharges of existing and proposed stormwater ponds and flood profile information that corresponds to the peak discharges of channelized flow passing through the watershed. The GLWMO plan indicates that some of the required information for this section is included in the GLWMO Level Control Plan (1990).. Without having a copy of this plan, it is impossible to determine if the 1990 plan includes information on peak flow rates and storage volume capacity for each subwatershed, where all of the individual systems drain, areas where improvements fan be made, areas where runoff can be diverted to reduce either flooding issues or improve water quality issues. The GLWMO defers to the member communities to complete wetland function and value assessments. Metropolitan Council staff is encouraging the watershed to take the lead in completing awatershed-wide wetland function and values assessment. A watershed-wide function and value assessment would allow for consistent categorization of the u~etiands into various classes, thus allowing for a rational basis for protecting or utilizing the wetlands for stormwater treatment. Such a comprehensive watershed-wide analysis would allow for comparison between wetlands, provide for a needs assessment on a drainage or subdrainage basis, provide for the consistent application of evaluation criteria and is more likely to develop consistent goals and policies related to wetlands. Regulatory Framework The main concern with this section is that the GLWMO does not intend to have a permitting program. The GLWMO relies on its member cities to maintain regulatory control and responsibility for water resource management related activities. Council staff encourages the GLWMO to consider a permitting program. This could be adual-permit program with the member communities or a stand alone permit program. A permit program would help ensure that the GLWMO had some oversight or input into the local programs, policies, and standards. Page 3-6 states that the NPDES Phase II rules require operators of construction sites disturbing one to five acres to obtain an NPDES permit. The new rules actually require that all sites disturbing more than one-acre need an NPDES permit. Assessment. of Problems The problems and issues can be lumped into four categories: 1. Resources specific water quality issues 2. Resource specific flooding and stormwater runoff rate issues 3. Watershed-wide issues 4. Adequacy of existing programs. The plan does a good job of generally assessing the problems.. The plan puts a lot of emphasis of the problems associated with water quality of the lakes. However, the plan fails to make it clear whether there are any other types of specific problems in the watershed such as areas prone to flooding or erosion and sediment control problems. If there are such problems, the problems should be identified in this plan. The plan should also include solutions to the problems and include the projects and costs for the projects in Table 6-1 in the Implementation Program section..