Daily Reservoir and Pass-Thru Status Report
October 23, 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%
10/23/2021 203.2 305,894 46.2% 92.1 219,887 85.8% 525,781 57.2% 43.4 155,551 96.6%
10/22/2021 203.2 305,894 46.2% 92.2 221,752 86.5% 527,646 57.4% 43.4 155,551 96.6%
09/23/2021 203.5 310,778 46.9% 92.1 219,887 85.8% 530,665 57.7% 43.0 151,919 94.3%
10/23/2020 199.3 246,145 37.1% 87.7 145,198 56.6% 391,343 42.6% 43.5 156,467 97.1%
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
September YTD Remaining September YTD Remaining
10/22/2021 137 3,069 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
10/22/2021 0 0 9,327 3,712 132,207 10/23/2021 7:15 AM 10.54
WEATHER RELATED INFORMATION
  Choke Canyon Reservoir Lake Corpus Christi CCR/LCC Combined
  10/22/2021 MTD YTD 10/22/2021 MTD YTD 10/22/2021 MTD YTD
Air Temp 83     84        
Evaporation 161 4,818 66,205 152 4,542 58,394 313 9,360 124,599
Rainfall 0.00 0.47 27.39 0.00 2.75 36.75      
Stream Flows
Gauging Station 10/22/2021 MTD
NTRT Nueces River at Three Rivers, Texas 86 3,643
NRTT Nueces River at Tilden, Texas 0 0
FRTT Frio River at Tilden, Texas 2 13
SMTT San Miguel Creek at Tilden, Texas 0 99
ARWT Atascosa River at Whitsett, Texas 9 1,431
CCR Release from Choke Canyon Reservoir 58 1,266
NRMT Nueces River at Mathis, Texas (La Fruta Bridge) 196 3,878
NCAT Nueces River at Calallen, Texas 0 4,287
RBP Rincon Bayou Pipeline 0 0
Reservoir InFlow
Computed as: (NTRT+FRTT+SMTT)-Release from Choke Canyon 31 2,488
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   2,488
Reservoir Inflow 2,488
Estuary Inflows (NCAT + RBP) 4,287
Passthru Surplus / -Deficit 2,463
Report Generated 10/23/2021 at 9:19:52 AM