Trans 207.04(11)(11) “Ordinary high watermark” means the point on the banks or shore up to which the presence and action of water is so continuous as to leave a distinct mark either by erosion or destruction of terrestrial vegetation, or other easily recognizable characteristics.

Trans 207.04 NoteNote: “Ordinary high watermark” originated in a 1914 Wisconsin supreme court case (Diana Shooting Club v. Husting) and has been a principal consideration in state regulation of navigable waterways since that time. It is the landward limit of the bed of a navigable body of water. This standard relies directly on the ordinary high watermark concept.

Trans 207.04(12)(12) “Overflow section” in a highway-water crossing means a segment of the highway gradeline which will be low enough to allow a portion of the streamflow to pass over the top of the roadway as a relief to the structure during periods of high water.

Trans 207.04(13)(13) “Public highway” means any highway, road, street or alley which is open for public use and is maintained and administered by any county, town, village or city.

Trans 207.04(14)(14) “Regional flood” means a flood determined to be representative of large floods known to have generally occurred in Wisconsin and which may be expected to occur on a particular stream because of like physical characteristics. This definition is intended to parallel the definition of “regional flood” found in s. NR 116.03 (24) as of August 1, 1980.

Trans 207.04(15)(15) “Riprap” means a quantity of durable stones or concrete pieces of varying size and shape, placed as a protective layer over soil in such a manner that the smaller pieces fill the spaces between the larger pieces. Concrete pieces are less desirable than stones for this use and those with exposed reinforcing rods shall not be used.

Trans 207.04(15)(a)(a) Regular riprap stone pieces for regular riprap, except those used for chinking, shall range in weight from approximately 25 to 150 pounds, with not less than approximately 50% of the pieces weighing more than 60 pounds. Regular riprap shall be at least 12 inches in thickness, measured perpendicular to the slope.

Trans 207.04(15)(b)(b) Heavy riprap stone pieces shall range in weight up to 400 pounds or more. Not less than approximately 50% of the total volume shall consist of pieces weighing 150 pounds or more, and not less than approximately 80% of the total volume shall consist of pieces weighing 40 pounds or more. Heavy riprap may be placed by any mechanical means which will produce a reasonably uniform surface texture. Heavy riprap shall be not less than 24 inches in thickness.

Trans 207.04(16)(16) “Waterway” means any stream which is navigable pursuant to s. 30.10, Stats.

Trans 207.05(1)(1) If a highway-water crossing is a minor replacement as described under s. Trans 207.04 (10), the conceptual plan need only consist of a county map noting the site location and sufficient information to establish that the proposal meets the conditions set forth under s. Trans 207.04 (10). As a minimum, this would be a description of the existing and proposed structure with a comparative flowline elevation.

Trans 207.05(2)(2) All other replacements shall require the following information as part of the conceptual plan:

Trans 207.05(2)(a)(a) Site Map with a minimum scale of 1″= 660′ and a minimum area of coverage must include the width of the floodplain and extend 1⁄4 mile upstream and 1⁄4 mile downstream from site. Principal topographic features and the proposed highway and structure layout shall be shown. Contours are desirable but not mandatory. They can be aerial photos or based on an aerial photo.

Trans 207.05(2)(b)(b) Profiles along centerline of roadway and center of stream bed, showing groundline, stream bottom, finished grade of road, elevation of upstream regional flood water if known, datum elevation, and at least one identifiable bench mark and reference elevation.

Trans 207.05(2)(c)(c) Sketch of proposed structure, minimum scale 1″ = 50′, plan and profile view, major dimensions shown.

Trans 207.05(2)(d)(d) If the proposed structure is the replacement of an existing structure, sketch and describe the existing structure. Show an existing hydraulic cross-section of the structure including any related roadway overflow sections which form the waterway opening passing the regional flood.

Trans 207.05(2)(e)(e) Data shall include general dimensions, type and material of proposed structure, hydraulic data including regional flood backwater at the structure, if known, type of roadway fill, temporary and permanent erosion control features, elevation of water surface profile which has been established by zoning ordinance if any, and muck and peat excavation and disposal.

Trans 207.05 NoteNote: All or part of these requirements may be waived as stated in s. Trans 207.11.

Trans 207.06(1)(1) New structures or replacements of existing highway structures in or over navigable waterways shall, except as set forth herein, maintain a clearance of not less than 5 feet.

Trans 207.06(2)(2) More clearance than 5 feet is necessary when the waterway has been, or is likely to be navigated when water levels are above the ordinary high watermark elevation or when the waterway is used by craft requiring greater clearance.

Trans 207.06(3)(a)(a) The waterway is known to have little or no navigational use;

Trans 207.06(3)(b)(b) The waterway is not anticipated to have navigational use by other than lightweight craft;