Control of erosion and sediment is the responsibility of the applicant. Design criteria, details, and specifications are located in the Stormwater Development Manual. Applicability and general requirements are defined as follows:
(A) Applicability. This section applies to the following sites with land-disturbing activities:
(1) Those requiring a subdivision plat approval or local improvement location permit for the construction of commercial, residential or institutional buildings on lots of approved subdivision plats;
(2) Those involving grading, removal of protective ground cover or vegetation, excavation, land filling, or other land-disturbing activity affecting a surface area of 10,000 square feet or more;
(3) Those involving excavation, filling, or a combination of excavation and filling affecting 400 cubic yards or more of soil, sand, gravel, stone, or other material;
(4) Those involving street, highway, road, or bridge construction, enlargement, relocation, or reconstruction; and
(5) Those involving the laying, repairing, replacing, or enlarging of an underground pipe or utility for a distance of 300 feet or more.
(B) Erosion and other sediment control requirements. The following requirements shall be met on all sites, regardless of size:
(1) Site dewatering. Sediment-laden water from dewatering activities flowing from the site shall be detained by temporary sediment basins or other appropriate measures. Also, water shall not be discharged in a manner that causes erosion in the receiving channel.
(2) Waste and material disposal. Wastes or unused building materials including, but not limited to, garbage, debris, cleaning wastes, wastewater, toxic materials, and hazardous substances, shall not be carried by runoff from a site. Proper disposal of all wastes and used building materials, in line with the nature of the waste material, is required.
(3) Tracking. Sediment being tracked from a site onto public or private roadways shall be minimized. This can be accomplished initially by a well-planned layout of roads, construction entrances, access drives, and parking areas of sufficient width and length. However, protective covering also may be necessary.
(4) Sediment removal. Public or private roadways shall be kept cleared of accumulated sediment. If appreciable sedimentation occurs after a storm event, the sediment shall be deposited on the parcels of land, if in the site, from where it likely originated so that the erosion and sedimentation does not recur.
(5) Drain inlet protection. All storm drain inlets shall be protected against sedimentation with straw bales, filter fabric, or equivalent barriers meeting accepted design criteria, standards, and specifications. During winter months other methods may be incorporated as approved by the city.
(6) Site erosion control. The following items apply only to the time period when land-disturbing activities are taking place:
(a) Runoff passing through a site from adjacent area shall be controlled by diverting it around disturbed areas.
(b) Runoff from a disturbed area shall be controlled by one or more of the following measures:
1. Unvegetated areas that are scheduled or likely to be left inactive for 15 days or more must be temporarily or permanently stabilized with measures appropriate for the season to minimize erosion potential. Alternative measures to site stabilization are acceptable if the project site owner or their representative can demonstrate they have implemented erosion and sediment control measures adequate to prevent sediment discharge. Vegetated areas with a density of less than 70% shall be restabilized using appropriate methods to minimize the erosion potential.
2. With disturbed areas within a site of 10 acres or more, where drainage is in the same direction or where runoff will result in loss of soil, an abatement or recovery program is required.
3. With disturbed areas within a site of less than 10 acres, filter fences, straw bales, or equivalent erosion control measures placed along all sideslope and downslope sides of the site shall be required.
(C) Barriers. Erosion from all storage piles shall be controlled by placing straw bales, filter fence or other appropriate barriers around the piles. Adjacent storm drain inlets shall be protected using similar filter barriers.
(Ord. 2004-46, passed 1-11-2005)