PERMFILE48500

• Permit No: M2001001
• IBM Index Class Name: Permit File
• Doc Date: 3/21/2001
• Doc Name: STATEMENT OF ISSUES
• Media Type: D
• Archive: No

' seasonal, but must be of sufficient extent and duration to normally reoccur annually.
Tributary wetlands do not include constructed or created wetlands.
' (30) "USE ATTAINABILITY ANALYSIS" means an assessment of the factors affecting the
attainment of aquatic life uses or other beneficial uses, which may include physical,
chemical, biological, and economic factors.
1 (31) "USES" see Beneficial Uses.
' (32) "WARM WATER BIOTA" means aquatic life normally found in waters where the summer
temperature frequently exceeds 20o C.
' (33) "WATER QUALITY-BASED DESIGNATION" means a designation adopted by the
Commission for specific state surface waters pursuant to section 31.8(2), to identify
which level of water quality protection such waters will receive under the Antidegradation
' Rule in section 31.8{1). Such designations are adopted pursuant to the Commission's
authority to classify state waters, as set forth in section 25-8-203, C.R.S., and the
procedural requirements for classifying state waters shall be applied in adopting such
designations.
(34) "WATER EFFECT RATIO" means a ratio that is computed as a specific pollutant's acute
or chronic toxicity value measured in water from the site covered by a standard, divided
' by the respective acute or chronic toxicity value in laboratory dilution water, as more
specifically defined in 40 C.F.R. subsection 131.36(c) (1993).
' (35) "WATER QUALITY STANDARD" see Standard.
(36) "WETLANDS" means those areas that are inundated or saturated by surface or ground
water at a frequency and duration sufficient to support, and that under normal
circumstances do support, a prevalence of vegetation typically adapted for life in
saturated soil conditions.
' 31.6 PROCESS FOR ASSIGNING CLASSIFICATIONS
The Commission is responsible for classifying state waters as set forth in sections
25-8-202(1)(a), and 25-8-203, C.R.S. All state surface waters may be classified in one or more
of the use classifications as set forth in section 31.13.
Waters shall be classified for the present beneficial uses of the water, or the beneficial uses that
may be reasonably expected in the future for which the water is suitable in its present condition
or the beneficial uses for which it is to become suitable as a goal. The assignment of one or
' more classifications to a portion of the state surface waters is based upon its current suitability
for the designated uses or goals for future uses. Where the use classification is based upon a
future use for which the waters are to become suitable, the numeric standards assigned to such
waters to protect the use classification may require a temporary modification to the underlying
numeric standard and an implementation plan for eliminating the temporary modification.
' When assigning classifications to waters of a given area, the Commission will consider the
goals, objectives, and requirements of federal and state statutes and regulations,

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