A. 
The elevation of a lot shall not be substantially changed from the approved grading plan on file with the Village so as to materially affect the flow of water from the lot to adjacent lands, or materially affect the flow of water from adjacent lands across the lot to other adjacent lands, without the written approval of the Village Engineer.
B. 
No owner shall grade or obstruct any swale or drainageway, whether protected by easement or not, which exists at the time of adoption of this chapter, so as to impede the flow of surface water between lots or to and from adjacent lots through such swale or drainageways. This shall include any swales or drainageways along a public road.
C. 
No structure, planting or other materials shall be placed or permitted to remain which may change the direction or impede the flow of surface water in drainage channels in the easement, unless such materials are designed as an integral part of an overall stormwater management plan, such as rain gardens to provide for water infiltration.
D. 
Any stormwater management easement area on a lot and all stormwater improvements therein shall be maintained continuously by the lot owner, except for those improvements for which a public authority, utility company or cable company is responsible.
E. 
All downspouts shall be directed to pervious surfaces.
F. 
The site shall be graded so stormwater is directed as indicated on the final grading plan. In the event an owner or purchaser does not complete the site grading according to the approved grading plan or subsequent to completion modifies the site grading so that the site is no longer in compliance with the approved plan, the Village of Johnson Creek shall not be responsible for any loss suffered by an owner as a result of the owner's failure to create or maintain proper grading on the lot.
Maintaining the water quality in our creeks and rivers is a benefit to all Johnson Creek property owners. A major stormwater management concern prior to and during construction is erosion control. Bare soil, easily eroded by moderate rains, can wash into rivers, lakes and streams, polluting these critical areas. Many effective techniques have been developed to reduce the harmful effects of erosion and restore the site's natural infiltration capability following construction.
A. 
Prior to home construction, the area of the lot that will be disturbed by construction shall be defined and kept to a minimum. All portions of the lot that will not be affected by construction shall be left with existing vegetation permanently, or until landscaping is ready to occur, and shall not be used for storage of equipment or materials. By retaining the existing vegetation, the soil will have less chance of washing out by heavy rains. By not allowing storage and equipment in this area, the chance of soil becoming compacted is reduced and is more likely to allow water to infiltrate into the ground rather than run off.
B. 
A temporary diversion berm using salvaged topsoil shall be constructed along the lowest sides of the lot. The diversion will act as a barrier for sediment that could potentially wash from the site during heavy rains. Stone weeps within the diversion allow the water to be filtered of sediment prior to being released off site, reducing the amount of sediment and pollution that reaches rivers and other bodies of water.
C. 
A stone tracking pad is required at the entrance of each lot. The large stones allow mud and soil from the tires of construction vehicles to fall off prior to the vehicles leaving the construction site.
D. 
On lots adjoining environmentally sensitive areas, such as wetlands and environmental corridors, the installation of a four-foot snow fence will be required at the boundary between the area of disturbance and the adjacent sensitive area. The fence is required to protect the environmentally sensitive areas from windblown construction debris.
E. 
Once all construction equipment and materials have been removed from the disturbed portion of the lot, the entire disturbed area shall be deep-tilled. Deep tilling, or chisel plowing, will loosen up the soil from the compaction of the heavy construction equipment. This makes the soil a better growing environment for lawn and plantings and helps reduce the amount of potential run off by allowing better infiltration into the soil. Once the soil has been loosened, no equipment or storage other than landscape equipment shall be allowed on this portion of the site.
F. 
Deep tilling shall not be done below the dripline of any mature trees that are to be kept, as this can damage the root system of the tree.