30.2023(7)(7) The structure is secured into the bank of the navigable water in a manner that prevents erosion or scouring.

30.2023(8)(8) The riparian owner places riprap at the base of the waterward side of the structure up to the waterline or, if the structure is placed in a location where watercraft are moored, the riparian owner places riprap at the base of the waterward side of the structure up to a point that allows adequate space for the mooring of watercraft.

30.2023(9)(9) The structure is constructed of treated wood and built so that the top of the structure meets the lower of the following:

30.2023(9)(a)(a) The natural topography of the bank of the navigable water.

30.2023(9)(b)(b) A point that is 4 feet above the ordinary high-water mark of the navigable water.

30.2023(9)(c)(c) The minimum height required to prevent overtopping by wave action.

30.2025(1)(1) Definition. In this section, “district” means the Rock-Koshkonong public inland lake protection and rehabilitation district.

30.2025(2)(2) Authorization. The district may implement a project developed and approved by the U.S. army corps of engineers to place structures, or fill, or both on the bed of Lake Koshkonong for any of the following purposes:

30.2025(2)(a)(a) To improve navigation or to provide navigation aids.

30.2025(2)(b)(b) To restore or protect wetland habitat or water quality.

30.2025(2)(c)(c) To create, restore, or protect fish and wildlife habitat.

30.2025(2)(d)(d) To enhance the natural aesthetic value or improve the recreational use of the lake.

30.2025(3)(3) Location of structures and fill. Any structure or fill placed as part of the project authorized under sub. (2) shall be located in Lake Koshkonong within the area that consists of Secs. 10, 13, 18, 19, 20, 24, 33, and 35, T 5 N., R 13.

30.2025(4)(4) Preliminary requirements.

30.2025(4)(a)(a) Before beginning any activity involving the placement of a structure or fill as part of the project authorized under sub. (2), the district shall submit plans and specifications for the project to the department and obtain the department’s approval for the project.

30.2025(4)(b)(b) Before the department gives its approval for a project authorized under sub. (2), the department shall do all of the following:

30.2025(4)(b)2.2. Review the plans and specifications submitted to the department under par. (a) and obtain any other information that it determines is necessary to effectively evaluate the structural and functional integrity of the structure or fill.

30.2025(4)(b)3.3. Hold a public informational meeting to discuss the plans and specifications submitted under par. (a).

30.2025(4)(b)4.4. Determine that the structure or fill is structurally and functionally sound and that the structure or fill will comply with the requirements under sub. (5).

30.2025(5)(5) Requirements for structures and fill. A structure or fill placed as part of a project authorized under sub. (2) shall meet all of the following requirements:

30.2025(5)(a)(a) It may not materially affect the flood flow capacity of the Rock River.

30.2025(5)(c)(c) It may not cause material injury to the rights of an owner of lands underlying the structure or fill or to the rights of a riparian owner who owns lands affected by the project.

30.2025(5)(d)(d) It may not cause environmental pollution, as defined in s. 299.01 (4).