6.6 LGU Requirements (per 103B.205 subd.7)
This Plan includes a number of requirements of LGUs, as detailed in Section 7.1 below. In general, this Plan establishes performance goals and requirements but provides cities with flexibility to incorporate those requirements into their land use planning and operations and management programs to meet those subwatershed goals.
Subwatershed Phosphorus Load Reductions
Each subwatershed plan includes a required reduction by the LGUs in the subwatershed of the phosphorus load contributed by existing land uses. These load reductions are incorporated into the phosphorus load reduction plans for each lake that does not meet water quality goals. Where the receiving water does meet goals, the reduction is part of the District’s strategy to minimize future degradation of the water resource.
The requirement is a 15 percent reduction in loading from existing residential land use; 25 percent from agricultural land use; and 10 percent from other developed land use. This reduction can be accomplished through: application of BMPs such as additional street sweeping, local water quality ponds, rain gardens and infiltration swales, and agricultural BMPs that reduce erosion or treat runoff or drain tile discharge; prevention of future load increases through the conservation of lands previously identified for development; or achieving load removals in excess of the minimum required. The LGUs must identify in their local water management plans specific steps to accomplish these minimum reductions. Credits for existing BMPs in-place will be considered through the Local Surface Water Management Plan and evaluated on a case-by-case basis. The LGUs must also annually report to the District their progress toward accomplishing this requirement.
As noted above, a key element in achieving ecological integrity and other goals in the watershed is the conservation of key conservation areas, including high-value wetlands and uplands. As a requirement of this Plan, LGUs must identify in their local water management plans the Key Conservation Areas identified in each subwatershed plan and on Figure 33. The local plan must also identify strategies the LGU will undertake to protect the ecological and hydrological values of those areas. These may include such strategies as land use regulation; acquisition and management; and property owner education regarding land management strategies to maintain ecological integrity. The District will provide technical assistance to the LGUs to support their efforts to accomplish conservation to help attain the District’s and their own local conservation and natural resources management goals.
The wetland management classification system and wetland classifications set forth in the Functional Assessment of Wetlands will be the basis of wetland regulation by the District. Each local plan must review local wetland management policies and practices for consistency with the FAW and proposed management standards by classification.
Other issues include the management of landlocked basins in the watershed, groundwater protection, management of modeled or observed flooding locations, and stream velocity or erosion issues.
This Plan generally prohibits new outlets to landlocked basins to preserve the quality of downstream water resources. Outletting landlocked basins would discharge new volumes of water and new pollutant loads to downstream resources. This Plan establishes a minimum water resource management goal of no further degradation of water resources. New volumes and loads would be contrary to that goal. LGUs should plan to manage existing landlocked basins as closed basins, and develop suitable strategies for managing stormwater volumes and pollutant loads within the basin. Outletting will generally be discouraged unless there is a demonstrated threat to property structures or public safety.
Many of the LGUs in the District have completed Wellhead Protection Plans detailing how they will protect groundwater resources providing drinking water to their community. The District will work collaboratively with the LGUs to develop infiltration and filtration strategies appropriate to wellhead protection areas as well as areas of general groundwater sensitivity.
The HHPLS identified locations throughout the watershed of observed or modeled flooding issues, potential erosive velocities, and observed or potential erosion. Each LGU is required by this Plan to identify those locations, evaluate impacts, and determine appropriate strategies for improving or mitigating impacts.