Villa Park Municipal Code Art. 10-13 Erosion Control

a. The faces of cut and fill slopes and project site shall be prepared and maintained to control against erosion in accordance with this section. Where cut slopes are not subject to erosion due to the erosion-resistant character of the materials, such protection may be omitted upon approval by the Building Official.

b. Where necessary, temporary and/or permanent erosion control devices such as desilting basins, check dams, riprap or other devices or methods, as approved by the Building Official, shall be employed to control erosion and provide safety during the rainy season from October 15th to April 15th.

c. No grading work in excess of two hundred (200) cubic yards will be allowed between October 15th and April 15 on any single grading site under permit unless an erosion control system has been approved or waived by the Building Official.

d. Paved streets, sidewalks, and other improvements shall be maintained in a neat and clean condition free of loose soil, construction debris and trash. Street sweeping or other equally effective means shall be used on a regular basis to prevent storm flows from carrying sediment and debris outside the project boundaries. Watering shall not be used to clean streets except for fine material not otherwise removed by sweeping or other mechanical means.

e. The civil engineer or other qualified individual who prepared the grading plan and designed the erosion control devices shall be responsible for inspection and modification of the devices, as necessary, during the rainy season.

f. Desilting facilities shall be provided at drainage outlets from the graded site.

g. Desilting basins shall be designed to provide a minimum desilting capacity equal to the current City of Villa Park standards.

h. Desilting basins shall be constructed around the perimeter of projects whenever feasible when it provides improved maintenance access from paved roads during wet weather.

i. Desilting basins constructed of compacted earth shall be compacted to a relative compaction of ninety (90) percent of maximum density. A soil engineering report, prepared by the soil engineer, which includes the type of field testing performed, location and results of testing shall be submitted to the Building Official for approval upon completion of the desilting basins.

j. Equipment and workers for emergency work shall be made available at all times during the rainy season. Necessary materials shall be available on-site and stockpiled at convenient locations to facilitate rapid construction of temporary devices when rain is imminent.

k. Erosion protection shall consist of effective planting of all slopes in excess of five (5) feet high unless otherwise approved by the Building Official. Slopes exceeding fifteen (15) feet high may require an adequate sprinkler system, as determined by the Building Official.

Protection for the slopes shall be installed as soon as practicable which may be prior to rough grade approval. Effective planting shall be installed, fully germinated and effectively cover the required slopes prior to final approval unless otherwise approved by the Building Official.

l. The erosion control provisions shall take into account drainage patterns during the current and future phases of grading throughout the rainy season.

m. All removable protective devices shown shall be in place at the end of each working day when the five (5) day rain probability forecast exceeds forty (40) percent.

n. Graded areas around the tract perimeter must drain away from the face of the slopes at the conclusion of each working day.

Erosion control plans prepared in accordance with Subarticle 13 of the Grading Manual shall be submitted to the Building Official for approval by September 15 each year for projects under grading permit. The erosion control plan may be waived for grading projects on single residential lot projects providing that an erosion control system, meeting the approval of the Building Official, has been installed, placed, planted or constructed before October 15.

a. After each rainstorm, silt and debris shall be removed from check berms and desilting basins and the basins pumped dry.

b. After each rainstorm, the performance of the erosion control system shall be evaluated and revised and repaired as necessary.

c. Devices shall not be moved or modified without the approval of the Building Official.

d. The contractor shall be responsible and shall take necessary precautions to prevent trespass only areas where impounded water creates a hazardous condition.

e. The contractor and permittee or project owner shall be responsible for continual maintenance of the devices during the rainy season. In the event of failure or refusal by the contractor, permittee or project owner to properly maintain the devices, the Building Official may cause emergency maintenance work to be done to protect adjacent private and public property. The cost shall be charged to the owner and shall include an initial mobilization cost plus the cost of doing the work as contained in Subarticle 6 of this Chapter.

f. In the event the Building Official must cause emergency maintenance work to be done, he may revoke the grading permit in writing. The permit shall not be renewed until an erosion control system approved by the Building Official is installed and a fee of one-half the amount required for the original permit paid by the owner. The Building Official may waive installation of an erosion control system after April 15.

g. If any grading subject to subsection 10-3.1, Grading Permits, of this Chapter has commenced on private property without a valid grading permit, the property owner may be required to prepare and implement an erosion control plan which has been approved by the Building Official. In the event of failure by the property owner to install an approved erosion control system, the Building Official may cause emergency work to be done to protect adjacent private and public property. The procedures of subsection 10-4.3 Hazardous Conditions of this Chapter need not apply for emergency erosion control work between October 15 and April 15. The cost shall be charged to the owner in accordance with item e. of this section.