Daily Reservoir and Pass-Thru Status Report
September 16, 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%
09/16/2021 203.7 314,054 47.4% 92.3 223,623 87.2% 537,677 58.5% 43.3 154,639 96.0%
09/15/2021 203.7 314,054 47.4% 92.3 223,623 87.2% 537,677 58.5% 43.3 154,639 96.0%
08/16/2021 204.5 327,318 49.4% 93.0 236,887 92.4% 564,205 61.4% 44.0 161,085 100.0%
09/16/2020 199.9 254,794 38.4% 88.5 157,605 61.5% 412,399 44.9% 42.6 148,332 92.1%
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
09/15/2021 144 1,305 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
09/15/2021 1 865 9,327 1,798 15,936 09/16/2021 7:15 AM 8.94
WEATHER RELATED INFORMATION
  Choke Canyon Reservoir Lake Corpus Christi CCR/LCC Combined
  09/15/2021 MTD YTD 09/15/2021 MTD YTD 09/15/2021 MTD YTD
Air Temp 86     86        
Evaporation 325 4,954 56,377 371 4,141 49,987 696 9,095 106,364
Rainfall 0.00 0.27 24.29 0.00 1.54 31.91      
Stream Flows
Gauging Station 09/15/2021 MTD
NTRT Nueces River at Three Rivers, Texas 93 1,474
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 8 160
CCR Release from Choke Canyon Reservoir 58 863
NRMT Nueces River at Mathis, Texas (La Fruta Bridge) 179 4,776
NCAT Nueces River at Calallen, Texas 2 166
RBP Rincon Bayou Pipeline 0 1,893
Reservoir InFlow
Computed as: (NTRT+FRTT+SMTT)-Release from Choke Canyon 35 625
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   625
Reservoir Inflow 625
Estuary Inflows (NCAT + RBP) 2,059
Passthru Surplus / -Deficit 242
Report Generated 9/16/2021 at 9:05:16 AM