Erosion control facilities. Erosion control shall be required for all subdivisions or as required by the Village. The planning process, specifications and construction techniques will be done in accordance with specifications as stipulated by the Wisconsin Department of Natural Resources. Erosion control plans shall consist of the detailed soil survey map of the area indicating the site location as well as adjacent properties and the identification of any structures or natural features on the land adjacent to and within 250 feet of the site. The plan shall include a boundary line survey of the site, a location and description of the soil types which have been rated severe for erosion limitations by the USDA Soil Conservation Service and the elevation, dimension, location and extent of all proposed grading. It shall include the location and identification of any proposed additional structures or development on the site. It shall include plans for and specifications of drainage provisions, retaining walls, cribbing, planting, anti-erosion devices or other protective devices, whether temporary or permanent, to be constructed in connection with or as a part of the proposed work, together with a map showing the drainage area of the land tributary to the site, upstream culverts and other restrictions which may control the quantity and rate of runoff and a statement explaining the estimated runoff used to determine the design characteristics of any drainage device. Upstream drainage shall be considered and explained if any adverse effect is possible. Plans for removal, recontouring or other final disposition of sediment basins or other structural improvements or devices shall be included in the plan.
(1)
Factors which will be considered in reviewing land suitability and erosion control plans shall relate to the specific site conditions. The plan should reduce land grading and keep land disturbance to a minimum. Both surface runoff and stormwater drainage systems should be integrated to accommodate the increased runoff incurred during land grading. Existing temporary and future protective vegetation should be emphasized. The plan shall coordinate grading operation and sedimentation control measures so as to minimize land exposure to erosion to the briefest time. Sediment basins below high sediment producing areas should be planned, installed and maintained as safety devices to catch and trap excessive sediment from the development site. The plan should utilize available technologies to keep soil erosion to a minimum level.
(2)
The preparation of surface water, erosion and sediment control plans shall be undertaken by a qualified individual and shall be submitted to the Village Clerk. The Village Clerk shall transmit those plans to the Village planning or engineering consultant or Village staff who shall review and then transmit that information for review and recommendation by the Planning and Zoning Commission for action by the Village Board. Any comments or recommendations are advisory only, and the Village Board may, upon its own action, modify, adopt or reject any or all of the comments or recommendations. Upon consideration of the factors cited above and application of this section, conditions may be imposed for the approval of erosion control and runoff as are deemed necessary to accomplish the intent of this section. Among such conditions, without limitation because of specific enumeration, are:
(a)
All activities on the site shall be conducted in logical sequence to minimize the area of unstable soils at any one time.
(b)
Permanent grass and vegetative cover for the area.
(c)
Stabilization by means of mulching, nonvegetative materials, jute matte, excelsior, etc.
(d)
Sodding the area subject to erosion.
(e)
Staking of wetlands and the recording of a conservancy wetland easement and documentation on the property deed.
(f)
Use of low-growing plants, vines, shrubs, or other ground covers to stabilize sediment-producing areas.
(g)
Construction of structures that will stabilize the grade and water channels.
(h)
Construction of sediment basins shall be designed and built to ensure against failure of the structure resulting in loss of life or interruption of use or service of public utilities.
(i)
Use of grass waterways for the safe disposal of runoff water.
(j)
Utilization of existing topography and planning development to minimize erosion, such as planning roadways parallel to contours.
(k)
Leaving critical areas in an undisturbed condition or correction of critical areas that can cause erosion hazards.
(l)
Constructing diversionary channels and terraces across the slopes.