Daily Reservoir and Pass-Thru Status Report
September 13, 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%
09/13/2021 203.8 315,698 47.6% 92.3 223,623 87.2% 539,321 58.7% 43.4 155,551 96.6%
09/12/2021 203.9 317,346 47.9% 92.3 223,623 87.2% 540,969 58.9% 43.4 155,551 96.6%
08/13/2021 204.7 330,674 49.9% 93.0 236,887 92.4% 567,561 61.7% 43.9 160,156 99.4%
09/13/2020 199.9 254,794 38.4% 88.3 154,458 60.3% 409,252 44.5% 42.7 149,224 92.6%
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
09/12/2021 78 923 2,987 12,844 18,596 0 12,000 0
COLORADO RIVER WATER SUPPLY (CRWT)
Date Daily
Intake
MTD YTD Daily Flow MTD Flow Date Time Gage Height
09/12/2021 68 812 9,274 1,221 11,330 09/13/2021 7:15 AM 8.30
WEATHER RELATED INFORMATION
  Choke Canyon Reservoir Lake Corpus Christi CCR/LCC Combined
  09/12/2021 MTD YTD 09/12/2021 MTD YTD 09/12/2021 MTD YTD
Air Temp 87     89        
Evaporation 153 4,055 55,478 153 3,398 49,244 306 7,453 104,722
Rainfall 0.14 0.27 24.29 0.90 0.94 31.31      
Stream Flows
Gauging Station 09/12/2021 MTD
NTRT Nueces River at Three Rivers, Texas 92 1,191
NRTT Nueces River at Tilden, Texas 0 1
FRTT Frio River at Tilden, Texas 0 13
SMTT San Miguel Creek at Tilden, Texas 0 0
ARWT Atascosa River at Whitsett, Texas 8 135
CCR Release from Choke Canyon Reservoir 58 691
NRMT Nueces River at Mathis, Texas (La Fruta Bridge) 296 4,349
NCAT Nueces River at Calallen, Texas 5 8
RBP Rincon Bayou Pipeline 186 1,750
Reservoir InFlow
Computed as: (NTRT+FRTT+SMTT)-Release from Choke Canyon 34 514
ESTUARY INFLOWS AND PASSTHRU REQUIREMENTS
Target Passthru Monthly Target 11,500   11,500
Salinity Relief Credit 0 Effective  
Credit / -Deficit From Previous Month Date Deficit Satisfied 09/12/2021 -1,693
Return Flow Credit Effective   500
Required Passthru Monthly Target 11,500   514
Reservoir Inflow 514
Estuary Inflows (NCAT + RBP) 1,758
Passthru Surplus / -Deficit 51
Report Generated 9/13/2021 at 10:57:23 AM