Section 298.225 - Environmental Flow Standards(a) A water right application in the Trinity or San Jacinto river basins, which increases the amount of water authorized to be stored, taken or diverted as described in § 298.10 of this title (relating to Applicability), shall not reduce the long-term frequency on either a seasonal or annual basis at which the volumes of freshwater inflows, to Galveston Bay, as described in the figure in this subsection, occur. Attached Graphic
(b) The freshwater inflow standards are subject to adjustment, in accordance with Texas Water Code, 11.147(e-1). The adjustment for each inflow level is calculated by adding the volumes for all of the seasons in that inflow level for the entire year and multiplying that annual total volume by 12.5% to generate the maximum adjustment amount. The maximum adjustment, including the effect of any previous adjustments, cannot increase the total volume for that inflow level above the sum of the annual total of the original volume requirement for that level plus the 12.5% adjustment.(c) The following environmental flow standards are established for the following described measurement points: (1) West Fork Trinity River near Grand Prairie, Texas, generally described as United States Geological Survey (USGS) gage 08049500, and more specifically described as Latitude 32° 45' 45"; Longitude 96° 59' 40". Attached Graphic
(2) Trinity River at Dallas, Texas, generally described as USGS gage 08057000, and more specifically described as Latitude 32° 46' 29"; Longitude 96° 49' 18". Attached Graphic
(3) Trinity River near Oakwood, Texas, generally described as USGS gage 08065000, and more specifically described as Latitude 31° 38' 54"; Longitude 95° 47' 21". Attached Graphic
(4) Trinity River near Romayor, Texas, generally described as USGS gage 08066500, and more specifically described as Latitude 30° 25' 30"; Longitude 94° 51' 02". Attached Graphic
(5) East Fork San Jacinto River near Cleveland, Texas, generally described as USGS gage 08070000, and more specifically described as Latitude 30° 20' 11"; Longitude 95° 06' 14". Attached Graphic
(6) West Fork San Jacinto River near Conroe, Texas, generally described as USGS gage 08068000, and more specifically described as Latitude 30° 14' 40"; Longitude 95° 27' 25". Attached Graphic
30 Tex. Admin. Code § 298.225
The provisions of this §298.225 adopted to be effective May 15, 2011, 36 TexReg 2908