Finally, it shall be noted that stabilization requires more than seed alone.In those cases, Permittees must immediately initiate stabilization of exposed soil areas, as described in item 8.4, and complete the stabilization within seven (7) calendar days after the construction activity in that portion of the site temporarily or permanently ceases. Other permit requirements exist during the construction of post-construction/permanent stormwater and temperature control BMPs discharging to special waters and impaired waters.For Public Waters that the Minnesota DNR has promulgated work in water restrictions during specified fish spawning time frames, permittees must complete stabilization of all exposed soil areas within 200 feet of the water's edge, and that drain to these waters, within 24 hours during the restriction period.Stabilization is not required on temporary stockpiles without significant silt, clay or organic components (e.g., clean aggregate stockpiles, demolition concrete stockpiles, sand stockpiles) but must provide sediment controls at the base of the stockpile. Stabilization is not required on constructed base components of roads, parking lots and similar surfaces. Stabilization must be completed no later than 14 calendar days after the construction activity has ceased. Stabilization must be initiated immediately to limit soil erosion when construction activity has permanently or temporarily ceased on any portion of the site and will not resume for a period exceeding 14 calendar days. Permittees must stabilize all exposed soil areas, including stockpiles.The MPCA Construction General Permit has several requirements regarding temporary stabilization.

Tackifiers and soil stabilizers can be used in conjunction with seed and mulch materials to achieve temporary and/or permanent stabilization. Applicable areas include topsoil stockpiles, rough graded areas, sediment basin dikes, temporary earthen structures, and graded areas. Tackifiers and soil stabilizers are applied hydraulically to reduce erosion by binding soil particles or mulch materials, often in conjunction with temporary or permanent seeding. Bare areas that are not actively being worked need some type of cover or stabilization practice to prevent or minimize erosion in the event of rainfall or snowmelt. Site stabilization with soil binders and tackifier bonded mulch (e.g., straw, other fibers) applies to 1) areas of construction sites where soil disturbing activities have temporarily ceased, and measures are needed to prevent erosion and sediment runoff during rainfall or snowmelt and 2) areas of the site that require permanent stabilization.Д¬onstruction sites often have areas where soil disturbing activities such as clearing, grading, or cut/fill work has stopped for a period of time. While they are effective for a wide range of soil, slope, temperature, and rainfall conditions, they are not intended for use in concentrated flow locations, such as ditches and channels. Stabilizers and tackifiers are temporary measures, designed to prevent short-term (e.g., two to four weeks) erosion between construction periods, and during seed germination and early growth for permanent stabilization. The use of tackifiers to prevent the movement of mulch material by wind and rain helps to keep straw and/or other mulches in place, preventing soil erosion.

4.5 Products used primarily for unpaved roadway stabilization:Д¬hemical-based soil stabilization is intended to counteract the erosive influences of rainfall, snowmelt, and wind on bare soil.

4.2 Binders from plant materials, lasting six to twelve months.

4.1 Binders from plant materials, lasting less than six months.

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