Daily Reservoir and Pass-Thru Status Report
September 26, 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%
09/26/2021 203.5 310,778 46.9% 92.0 218,027 85.1% 528,805 57.5% 42.9 151,018 93.8%
09/25/2021 203.5 310,778 46.9% 92.1 219,887 85.8% 530,665 57.7% 42.9 151,018 93.8%
08/26/2021 204.3 323,977 48.9% 92.9 234,975 91.7% 558,952 60.8% 43.6 157,385 97.7%
09/26/2020 199.8 253,336 38.2% 88.2 152,896 59.6% 406,232 44.2% 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
August YTD Remaining August YTD Remaining
09/25/2021 145 2,754 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
09/25/2021 0 865 9,327 206 22,401 09/26/2021 7:15 AM 6.91
WEATHER RELATED INFORMATION
  Choke Canyon Reservoir Lake Corpus Christi CCR/LCC Combined
  09/25/2021 MTD YTD 09/25/2021 MTD YTD 09/25/2021 MTD YTD
Air Temp 87     86        
Evaporation 333 8,528 59,951 292 7,054 52,900 625 15,582 112,851
Rainfall 0.00 0.27 24.29 0.00 1.62 31.99      
Stream Flows
Gauging Station 09/25/2021 MTD
NTRT Nueces River at Three Rivers, Texas 71 2,217
NRTT Nueces River at Tilden, Texas 0 1
FRTT Frio River at Tilden, Texas 0 14
SMTT San Miguel Creek at Tilden, Texas 0 0
ARWT Atascosa River at Whitsett, Texas 5 223
CCR Release from Choke Canyon Reservoir 58 1,439
NRMT Nueces River at Mathis, Texas (La Fruta Bridge) 169 6,670
NCAT Nueces River at Calallen, Texas 3 349
RBP Rincon Bayou Pipeline 0 1,893
Reservoir InFlow
Computed as: (NTRT+FRTT+SMTT)-Release from Choke Canyon 14 792
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   792
Reservoir Inflow 792
Estuary Inflows (NCAT + RBP) 2,242
Passthru Surplus / -Deficit 257
Report Generated 9/26/2021 at 9:46:00 AM