Daily Reservoir and Pass-Thru Status Report
September 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%
09/07/2021 204.0 318,997 48.1% 92.5 227,383 88.7% 546,380 59.4% 43.7 158,306 98.3%
09/06/2021 204.0 318,997 48.1% 92.6 229,272 89.4% 548,269 59.6% 43.7 158,306 98.3%
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%
09/07/2020 199.7 251,884 38.0% 87.9 148,255 57.8% 400,139 43.5% 42.9 151,018 93.8%
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
09/06/2021 78 458 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
09/06/2021 68 406 8,867 1,080 4,873 09/07/2021 7:15 AM 8.10
WEATHER RELATED INFORMATION
  Choke Canyon Reservoir Lake Corpus Christi CCR/LCC Combined
  09/06/2021 MTD YTD 09/06/2021 MTD YTD 09/06/2021 MTD YTD
Air Temp 96     96        
Evaporation 376 2,170 53,593 297 1,820 47,666 673 3,990 101,259
Rainfall 0.13 0.13 24.15 0.00 0 30.37      
Stream Flows
Gauging Station 09/06/2021 MTD
NTRT Nueces River at Three Rivers, Texas 94 638
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 9 79
CCR Release from Choke Canyon Reservoir 58 345
NRMT Nueces River at Mathis, Texas (La Fruta Bridge) 383 2,078
NCAT Nueces River at Calallen, Texas 0 2
RBP Rincon Bayou Pipeline 195 600
Reservoir InFlow
Computed as: (NTRT+FRTT+SMTT)-Release from Choke Canyon 37 305
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   -1,693
Return Flow Credit Effective   0
Required Passthru Monthly Target 11,500   305
Reservoir Inflow 305
Estuary Inflows (NCAT + RBP) 603
Passthru Surplus / -Deficit -1,395
Report Generated 9/7/2021 at 8:50:00 AM