2025 2 18 Regular Session Packet 1

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(17) Ecoregion is a relatively homogeneous area defined by similarity of climate, 
landform, soil, potential natural vegetation, hydrology, or other ecologically relevant 
variables. Ecoregions can be determined for specific stream segments by using 
Tennessee’s Online Water Quality Assessment Data viewer http://tdeconline.tn.gov/dwr. 
(18) Exceptional Tennessee Waters are surface waters designated by the Tennessee 
Department of Environment and Conservation as having the characteristics set forth at 
Tennessee Rules, Chapter 0400-40-03-.06(4). Characteristics include waters within parks 
or refuges; scenic rivers; waters with threatened or endangered species; waters that 
provide specialized recreational opportunities; waters within areas designated as lands 
unsuitable for mining; waters with naturally reproducing trout; waters with exceptional 
biological diversity and other waters with outstanding ecological or recreational value. 
(19) Hot spot means an area where land use or activities generate highly contaminated 
runoff, with concentrations of pollutants in excess of those typically found in stormwater. 
Examples might include operations producing concrete or asphalt, auto repair shops, auto 
supply shops, large commercial parking areas and restaurants. 
(20) Improved sinkhole is a natural surface depression that has been altered in order to 
direct fluids into the hole opening. Improved sinkhole is a type of injection well regulated 
under the Underground Injection Control (UIC) program of the Tennessee Department of 
Environment and Conservation. Underground injection constitutes an intentional disposal 
of waste waters in natural depressions, open fractures and crevices, such as those 
commonly associated with weathering of limestone. 
(21) Level 1 EPSC Certification - Fundamentals of Erosion Prevention and Sediment 
Control training and certification program administered by University of Tennessee Water 
Resources Research Center (https://tnepsc.org/index.asp).  
(22) Level 2 EPSC Design Certification - Design Principles for Erosion Prevention 
and Sediment Control for Construction Sites training and certification program 
administered by University of Tennessee Water Resources Research Center 
(https://tnepsc.org/index.asp). 
(23) Linear Project is a land disturbing activity as conducted by an 
underground/overhead utility or highway department, including, but not limited to, any 
cable line or wire for the transmission of electrical energy; any conveyance pipeline for 
transportation of gaseous or liquid substance; any cable line or wire for communications; 
or any other energy resource transmission ROW or utility infrastructure, e.g., roads and 
highways. Activities include the construction and installation of these utilities within a 
corridor. Linear project activities also include the construction of access roads, staging 
areas and borrow/spoil sites associated with the linear project. Land disturbance specific 
to the development of residential and commercial subdivisions or high-rise structures is 
not considered a linear project. 
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