Daily Reservoir and Pass-Thru Status Report
August 7, 2021
Reservoir Supply (AcFt); Stream Flow (AcFt); Evaporation (AcFt); Elevation (Ft); Rainfall (Inches); Temperature (°F); Gage Height (Ft MSL)
RESERVOIR STATISTICS
Effective June 24, 2017, updated total reservor capacities for Choke Canyon Reservoir (2012 TWDB Volumetric Survey) and
Lake Corpus Christi (2016 TWDB Volumetric Survey) are being reflected in the Daily Reservoir System and Pass-Thru Status Report
  Choke Canyon Reservoir Lake Corpus Christi CCR/LCC Combined Lake Texana
Date Elevation Volume % Capacity Elevation Volume % Capacity Volume % Capacity Elevation Volume % Capacity
FULL 220.5 662,821 100% 94.0 256,339 100% 919,160 100% 44.0 161,085 100%
08/07/2021 204.8 332,359 50.1% 93.0 236,887 92.4% 569,246 61.9% 44.0 161,085 100.0%
08/06/2021 204.7 330,674 49.9% 93.0 236,887 92.4% 567,561 61.7% 43.9 160,156 99.4%
07/07/2021 204.2 322,313 48.6% 91.4 206,995 80.8% 529,308 57.6% 44.0 161,085 100.0%
08/07/2020 200.5 263,671 39.8% 88.8 162,385 63.3% 426,056 46.4% 44.0 161,085 100.0%
LAKE TEXANA WATER SUPPLY*
* The split between Non-Interruptible and Interruptible amounts are updated monthly, usually the first working day of the month, so they reflect the total and remaining amounts as of the end of the previous month
Date Daily Intake MTD Non-Interuptible Interruptible
July YTD Remaining July YTD Remaining
08/06/2021 142 849 3,013 9,857 21,583 0 12,000 0
COLORADO RIVER WATER SUPPLY (CRWT)
Date Daily
Intake
MTD YTD Daily Flow MTD Flow Date Time Gage Height
08/06/2021 0 0 6,984 3,930 10,064 08/07/2021 7:15 AM 11.13
WEATHER RELATED INFORMATION
  Choke Canyon Reservoir Lake Corpus Christi CCR/LCC Combined
  08/06/2021 MTD YTD 08/06/2021 MTD YTD 08/06/2021 MTD YTD
Air Temp 88     90        
Evaporation 226 1,597 42,206 167 1,450 38,624 393 3,047 80,830
Rainfall 0.01 0.43 23.76 0.00 0.7 29.64      
Stream Flows
Gauging Station 08/06/2021 MTD
NTRT Nueces River at Three Rivers, Texas 953 3,228
NRTT Nueces River at Tilden, Texas 1 19
FRTT Frio River at Tilden, Texas 0 0
SMTT San Miguel Creek at Tilden, Texas 949 1,093
ARWT Atascosa River at Whitsett, Texas 316 1,002
CCR Release from Choke Canyon Reservoir 58 345
NRMT Nueces River at Mathis, Texas (La Fruta Bridge) 124 1,024
NCAT Nueces River at Calallen, Texas 46 174
RBP Rincon Bayou Pipeline 0 0
Reservoir InFlow
Computed as: (NTRT+FRTT+SMTT)-Release from Choke Canyon 1,844 3,975
ESTUARY INFLOWS AND PASSTHRU REQUIREMENTS
Target Passthru Monthly Target 5,000   5,000
Salinity Relief Credit 0 Effective  
Credit / -Deficit From Previous Month Date Deficit Satisfied   2,500
Return Flow Credit Effective 08/01/2021 500
Required Passthru Monthly Target 5,000   3,975
Reservoir Inflow 3,975
Estuary Inflows (NCAT + RBP) 174
Passthru Surplus / -Deficit -801
Report Generated 9/1/2021 at 4:22:10 PM