Daily Reservoir and Pass-Thru Status Report
September 1, 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%
09/01/2021 204.2 322,313 48.6% 92.8 233,068 90.9% 555,381 60.4% 43.6 157,385 97.7%
08/31/2021 204.2 322,313 48.6% 92.8 233,068 90.9% 555,381 60.4% 43.7 158,306 98.3%
08/01/2021 204.8 332,359 50.1% 93.0 236,887 92.4% 569,246 61.9% 43.9 160,156 99.4%
09/01/2020 199.8 253,336 38.2% 88.0 149,794 58.4% 403,130 43.9% 43.0 151,919 94.3%
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
August YTD Remaining August YTD Remaining
08/31/2021 77 2,987 0 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
08/31/2021 67 1,477 9,939 814 34,180 09/01/2021 7:15 AM 7.88
WEATHER RELATED INFORMATION
  Choke Canyon Reservoir Lake Corpus Christi CCR/LCC Combined
  08/31/2021 MTD YTD 08/31/2021 MTD YTD 08/31/2021 MTD YTD
Air Temp 96     95        
Evaporation 436 10,814 51,423 333 8,672 45,846 769 19,486 97,269
Rainfall 0.00 0.69 24.02 0.00 1.43 30.37      
Stream Flows
Gauging Station 08/31/2021 MTD
NTRT Nueces River at Three Rivers, Texas 127 14,112
NRTT Nueces River at Tilden, Texas 2 4,626
FRTT Frio River at Tilden, Texas 0 185
SMTT San Miguel Creek at Tilden, Texas 0 1,457
ARWT Atascosa River at Whitsett, Texas 21 4,044
CCR Release from Choke Canyon Reservoir 58 1,785
NRMT Nueces River at Mathis, Texas (La Fruta Bridge) 199 5,579
NCAT Nueces River at Calallen, Texas 0 307
RBP Rincon Bayou Pipeline 0 0
Reservoir InFlow
Computed as: (NTRT+FRTT+SMTT)-Release from Choke Canyon 70 13,970
ESTUARY INFLOWS AND PASSTHRU REQUIREMENTS
Target Passthru Monthly Target 2,500   2,500
Salinity Relief Credit 0 Effective  
Credit / -Deficit From Previous Month Date Deficit Satisfied   0
Return Flow Credit Effective   500
Required Passthru Monthly Target 2,500   2,500
Reservoir Inflow 13,970
Estuary Inflows (NCAT + RBP) 307
Passthru Surplus / -Deficit -1,693
Report Generated 9/1/2021 at 2:36:17 PM