Daily Reservoir and Pass-Thru Status Report
August 31, 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%
08/31/2021 204.2 322,313 48.6% 92.8 233,068 90.9% 555,381 60.4% 43.7 158,306 98.3%
08/30/2021 204.2 322,313 48.6% 92.8 233,068 90.9% 555,381 60.4% 43.7 158,306 98.3%
07/31/2021 204.8 332,359 50.1% 93.1 238,806 93.2% 571,165 62.1% 44.0 161,085 100.0%
08/31/2020 199.8 253,336 38.2% 88.1 151,341 59.0% 404,677 44.0% 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
July YTD Remaining July YTD Remaining
08/30/2021 78 2,910 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
08/30/2021 68 1,410 8,394 439 33,366 08/31/2021 7:15 AM 7.88
WEATHER RELATED INFORMATION
  Choke Canyon Reservoir Lake Corpus Christi CCR/LCC Combined
  08/30/2021 MTD YTD 08/30/2021 MTD YTD 08/30/2021 MTD YTD
Air Temp 96     95        
Evaporation 358 10,378 50,987 421 8,339 45,513 779 18,717 96,500
Rainfall 0.00 0.69 24.02 0.00 1.43 30.37      
Stream Flows
Gauging Station 08/30/2021 MTD
NTRT Nueces River at Three Rivers, Texas 119 13,985
NRTT Nueces River at Tilden, Texas 5 4,623
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 4,023
CCR Release from Choke Canyon Reservoir 58 1,727
NRMT Nueces River at Mathis, Texas (La Fruta Bridge) 174 5,381
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 61 13,900
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   5,000
Reservoir Inflow 13,900
Estuary Inflows (NCAT + RBP) 307
Passthru Surplus / -Deficit -1,693
Report Generated 9/1/2021 at 4:44:38 PM