Daily Reservoir and Pass-Thru Status Report
October 19, 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%
10/19/2021 203.3 307,518 46.4% 92.2 221,752 86.5% 529,270 57.6% 43.7 158,306 98.3%
10/18/2021 203.3 307,518 46.4% 92.2 221,752 86.5% 529,270 57.6% 43.8 159,229 98.8%
09/19/2021 203.6 312,414 47.1% 92.2 221,752 86.5% 534,166 58.1% 43.2 153,730 95.4%
10/19/2020 199.4 247,569 37.4% 87.8 146,723 57.2% 394,292 42.9% 43.6 157,385 97.7%
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
September YTD Remaining September YTD Remaining
10/18/2021 138 2,519 3,474 16,318 15,122 0 12,000 0
COLORADO RIVER WATER SUPPLY (CRWT)
Date Daily
Intake
MTD YTD Daily Flow MTD Flow Date Time Gage Height
10/18/2021 0 0 9,327 13,498 111,126 10/19/2021 7:15 AM 17.27
WEATHER RELATED INFORMATION
  Choke Canyon Reservoir Lake Corpus Christi CCR/LCC Combined
  10/18/2021 MTD YTD 10/18/2021 MTD YTD 10/18/2021 MTD YTD
Air Temp 78     79        
Evaporation 199 4,127 65,514 163 3,868 57,720 362 7,995 123,234
Rainfall 0.00 0.47 27.39 0.00 2.75 36.75      
Stream Flows
Gauging Station 10/18/2021 MTD
NTRT Nueces River at Three Rivers, Texas 170 3,241
NRTT Nueces River at Tilden, Texas 0 0
FRTT Frio River at Tilden, Texas 0 2
SMTT San Miguel Creek at Tilden, Texas 41 86
ARWT Atascosa River at Whitsett, Texas 46 1,352
CCR Release from Choke Canyon Reservoir 58 1,036
NRMT Nueces River at Mathis, Texas (La Fruta Bridge) 114 3,370
NCAT Nueces River at Calallen, Texas 1 4,287
RBP Rincon Bayou Pipeline 0 0
Reservoir InFlow
Computed as: (NTRT+FRTT+SMTT)-Release from Choke Canyon 154 2,292
ESTUARY INFLOWS AND PASSTHRU REQUIREMENTS
Target Passthru Monthly Target 9,000   9,000
Salinity Relief Credit 0 Effective  
Credit / -Deficit From Previous Month Date Deficit Satisfied 10/01/2021 164
Return Flow Credit Effective   500
Required Passthru Monthly Target 9,000   2,292
Reservoir Inflow 2,292
Estuary Inflows (NCAT + RBP) 4,287
Passthru Surplus / -Deficit 2,659
Report Generated 10/19/2021 at 9:13:06 AM