Daily Reservoir and Pass-Thru Status Report
September 28, 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%
09/28/2021 203.4 309,146 46.6% 92.0 218,027 85.1% 527,173 57.4% 42.8 150,120 93.2%
09/27/2021 203.4 309,146 46.6% 92.0 218,027 85.1% 527,173 57.4% 42.8 150,120 93.2%
08/28/2021 204.2 322,313 48.6% 92.9 234,975 91.7% 557,288 60.6% 43.5 156,467 97.1%
09/28/2020 199.7 251,884 38.0% 88.2 152,896 59.6% 404,780 44.0% 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
09/27/2021 144 3,044 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
09/27/2021 0 865 9,327 296 22,895 09/28/2021 7:15 AM 6.87
WEATHER RELATED INFORMATION
  Choke Canyon Reservoir Lake Corpus Christi CCR/LCC Combined
  09/27/2021 MTD YTD 09/27/2021 MTD YTD 09/27/2021 MTD YTD
Air Temp 92     91        
Evaporation 294 9,145 60,568 216 7,562 53,408 510 16,707 113,976
Rainfall 0.00 0.27 24.29 0.00 1.62 31.99      
Stream Flows
Gauging Station 09/27/2021 MTD
NTRT Nueces River at Three Rivers, Texas 71 2,360
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 5 234
CCR Release from Choke Canyon Reservoir 58 1,554
NRMT Nueces River at Mathis, Texas (La Fruta Bridge) 169 7,009
NCAT Nueces River at Calallen, Texas 0 351
RBP Rincon Bayou Pipeline 0 1,893
Reservoir InFlow
Computed as: (NTRT+FRTT+SMTT)-Release from Choke Canyon 14 820
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   820
Reservoir Inflow 820
Estuary Inflows (NCAT + RBP) 2,244
Passthru Surplus / -Deficit 231
Report Generated 9/28/2021 at 8:17:06 AM