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<br />IV. Best Manaoement Practices
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<br />Best management Practices (BMP's) are both structural and nonstructural
<br />techniques which either prevent or reduce pollution from nonpoint sources.
<br />Section 319 requires that the state include a list of BMP's for use in each
<br />significant category (agriculture, silviculture, mining, urban and
<br />construction runoff, and hydrologic modifications) of nonpointsource
<br />generating activity. Attached to each management program (Chapters IV, V, and
<br />VI) is a list of BMP's for use in Colorado. These recommended BMP's represent
<br />the work of the Task Force, and its subcommittees, to determine the best
<br />available practices at this time. These BMP's may be modified or new BMP's
<br />added to the list by the Task Force as necessary.
<br />
<br />The list of BMP's represent the first stage of a two stage system of selecting
<br />BMP's for use through Section 319. The lists found in the management programs
<br />are general, although specifications for these practices are available in
<br />Appendix A, Band C of this document. The second stage of BMP's require
<br />tailoring a selectedBMP or combinations of BMP's to achieve water/stream
<br />quality goals in a specific situation. This tailoring of BMP's should be
<br />considered in a broad framework of water/stream quality goals, various
<br />alternatives to achieve those goals, costs of alternatives, and the long term
<br />operation and maintenance of such systems.
<br />
<br />Implementation of BMP's to correct nonpoint source water quality problems is
<br />intended to be a voluntary program in Colorado. The nature of nonpoint source
<br />pollution, a diffuse and ephemeral source, makes institution of a permit
<br />program for dischargers impractical. It is therefore the intent of the
<br />nonpoint source program to encourage installation of ,BMP's in areas of
<br />critical nonpoint source problems through the use of grants, loans and
<br />voluntary efforts for construction. In some cases, benefits derived from'
<br />treating nonpoint sources may well encourage point source permit holders to be
<br />actively involved in nonpoint source projects.
<br />
<br />In the event that these BMP's are adopted by other regulatory agencies or are
<br />incorporated in other regulatory schemes, and the BMP's are thus imposed
<br />through independent legal authority, there is a third stage of BMP selection.
<br />In such cases the third stage of BMP selection requires that the agency
<br />imposing the BMP's must assess whether imposing BMP's is allowed by law.
<br />While the BMP's listed in this management program'may be useful if voluntarily
<br />accepted, additional rulemaking'may be required prior to imposition of BMP's
<br />in a regulatory scheme.
<br />
<br />A long term commitment to operation, maintenance and replacement of BMP's is a
<br />requirement of any project for nonpoint source improvement. Although initial
<br />capital costs for construction of BMP's may be low when compared to
<br />traditional point source treatment projects, the cost of'operation,
<br />maintenance and replacement may lead to ongoing expenses which must be
<br />considered during the planning of a project. Without proper operation,
<br />maintenance, and replacement, many BMP's and water quality improvements will
<br />be lost over time.
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<br />Page 21
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