R2026-58 Resolution Authorizing Lake Decatur Watershed Farmland Conservation Program Agreement for Floodplain Reconnection Wetlands with Lawrence H. Shackelford Trust

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( ,SD, United States Natural Resources Conservation Service Department of Agriculture Operation & Maintenance Plan Constructed Wetland(Code 656) Landowner/Operator: Date NRCS Service Center Conservation District Practice Location: Tract/Field ID: (Lat/Long or UTM Coord, or Sec/TS/R) Expected Lifespan The minimum expected lifespan of this practice is at least 15 years Follow the operation and maintenance plan below to establish wetland plants and keep your constructed wetland functioning as intended: • Establishing wetland plants using the Transplanting method: • When construction of the wetland is completed, keep the wetland dry(water control structure open) until after the basin is planted with emergent herbaceous macrophytes in the spring. • For the first year after planting,adjust the water control structure(s)so that the topsoil is kept moist to saturated with fresh water,up to a maximum of 1 inch of ponded water, for the first growing season or until 75%of the plants in the wetland pool area show new growth. • Then gradually increase the water level to the normal operating level as the wetland plants mature, always leaving a minimum of 4 to 6 inches of plant tops out of the water. • After the permanent pool water depth has been reached, the constructed wetland is ready for normal operation. • After the first growing season, if there is an area larger than 20%of the wetland without satisfactory vegetation,then that part of the wetland should be replanted. • Establishing wetland plants using the Seeding method: • For the first year after seeding, adjust the water control structure(s)so that the topsoil is kept moist to saturated with fresh water,up to a maximum of 1 inch of ponded water. • Then gradually increase the water level to the normal operating level as the wetland plants mature,always leaving a minimum of 4 to 6 inches of plant tops out of the water. • After the permanent pool water depth has been reached, the constructed wetland is ready for normal operation • After the first growing season, if there is an area larger than 20%of the wetland without satisfactory vegetation,contact NRCS for assistance with a revegetation plan. • Establishing wetland plants using the Natural Regeneration method: • For the first year after construction,adjust the water control structure(s)so that the topsoil is kept moist to saturated with fresh water,up to a maximum of 1 inch of ponded water. • Then gradually increase the water level to the normal operating level as the wetland plants mature,always leaving a minimum of 4 to 6 inches of plant tops out of the water. • After the permanent pool water depth has been reached,the constructed wetland is ready for normal operation. • After the first growing season,if there is an area larger than 20%of the wetland without satisfactory vegetation,contact NRCS for assistance with a revegetation plan. • Lock structures when not in use to prevent tampering and or vandalism. • Inspect after significant storm events and at least twice a year to identify repair and maintenance needs. • Inspect the downstream face of embankments annually Wet areas,indicated by seeps,wetland plants or unusually vigorous vegetation the downstream face of an embankment could indicate a NRCS, IL O&M-Page 1 of 3 May 2013