Descriptions of typical BMPs prescribed for residential and commercial properties, as well a discussion of their applications and effects may be found below:

Paving Dirt Driveways and Roads

A paved driveway is one of the most effective BMPs a homeowner can implement. A paved driveway prevents sediment from leaving a property in two ways: first it prevents sediment from an unpaved driveway from flowing off the property with stormwater, and second it prevents vehicle tires, snow removal equipment, and other disturbances from carry dirt from unpaved driveways into the street and eventually into the storm drain system. Soil erosion and storm water runoff can be controlled with a properly designed paved driveway. Driveways should be designed to preserve natural vegetation and to blend with the natural landform. Slotted drains or other flow interceptors may be needed to convey surface runoff to infiltration structures or stabilized drainage areas, usually at the driveway edge. Properly designed paved driveways will collect and, ideally, infiltrate sheet flow runoff and will prevent any surface runoff from flowing into the streets and drainages. Paved driveways should be designed and installed by qualified professionals.

Infiltrating Stormwater Runoff From Impervious Surfaces

Whenever possible, naturally vegetated areas should be protected and used for infiltration. The natural plant-soil complex can treat runoff better than any artificial infiltration system. Artificial systems must be used along impervious surfaces and driplines when natural vegetation isn’t present or is inadequate to infiltrate all the flow. Infiltration systems allow water to percolate through the soil, a process that filters and cleanses surface runoff of sediment and nutrients before it is discharged into rivers, streams and lakes as groundwater. An infiltration trench is a shallow rock- or gravel-filled trench located at drip lines or adjacent to other impervious surfaces where runoff collects or concentrates. Dry wells, stone- or gravel-filled pits, or French Drains are used when additional storage capacity for runoff is needed or as alternatives to infiltration trenches on steeper slopes.

Stabilizing or Retaining Steep Slopes and Loose Soils

A retaining structure is a wall or other structure placed at the bottom of a steep slope to prevent erosion. Retaining structures, including terraces, steps and other landscaping techniques, can be made of wood, rock, brick, or concrete block. The use of native vegetation along the top of and around retaining structures can increase the structure’s effectiveness. Vegetation alone and rock rip-rap (a layer of loose rock placed on an erodible surface) are also effective slope stabilization techniques. Additional permitting may be required for implementation of these BMPs. Basile Management Practice staff will help you determine if permits are required, and assist you in obtaining any required permits.

Vegetating and Mulching Bare Soils

Vegetation stabilizes soil, reduces raindrop impact, reduces velocity of surface runoff, prevents wind and water erosion, and enhances natural beauty. A relatively simple plan to plant native grasses, shrubs and other plants can be a highly effective BMP. The use of native and adapted plants is a Best Management Practice because those species require less fertilizer and irrigation than other species. Fertilizer application must be carefully managed to prevent excess plant nutrients from reaching surface and groundwater. Irrigation must be monitored to prevent overwatering and added surface runoff. Wood chip and bark mulches may be used for temporary stabilization or as permanent ground cover around trees and shrubs.

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