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NCSCO—RF (GP-001—MN) , techniques whose primary purpose is to enhance or create fish and wildlife habitat. To qualify for this general permit the following special conditions must be met: 1. The permit area must not be harvested for agricultural purposes before July 15 of any year. 2. The permit area must not be grazed by domestic livestock, used as a source of irrigation water, or serve as a dumping area or outlet for draining other wetlands. 3. The permit area must not be drained, filled, mowed, or managed in any manner which would destroy or reduce the long—term wetland character of the permit area or adjacent wetland areas. 4. Level ditches must not have an outlet. 5. The construction of the structure must be regulated and approved under appropriate state laws and rules. g. Fish Habitat Improvement -Structures or Fills (Includes rock reefs, :ish cribs, artificial fish—spaw ning beds, boulder placement, and bank cover) Rock reefs are created by the placement of select size rock in a selected pattern at a specific location on a waterbody as a fisheries management technique. (Rock size, placement pattern, and location, will depend on project purpose (i.e., to provide spawning substrate, increase desired productivity, provide cover or feeding stations, or to congregate fish for recreational fishing) and/or species of fish being managed.) Fish cribs are usually box —like log structures filled with brush, weighted down by rock or concrete blocks, but are sometimes constructed of used tires. Their main purpose is usually to improve angler success, by providing structures at which game fish would congregate. Artificial fish —spawning beds could be rock reefs as described above or lake they may consist of gravel, "astroturf", or other material placed on a or streambed to provide spawning habitat or they may be any of a number of different types of egg incubation chambers (chambers filled with hatchery or stripped fish eggs and placed at or near the bed of a lake or stream). Boulder placement is normally associated with fast —flowing streams to M`. provide trout cover and scour silt from the stream bottom. Bank cover is a device to provide trout with stream bank cove_". The banks are faced with rock to prevent Prosloa. Bank covers are placed just under the water surface to increase the life —span of wood planks and for aesthetic purposes. 1 C s a