Daily Reservoir and Pass-Thru Status Report
October 15, 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%
10/15/2021 203.4 309,146 46.6% 92.2 221,752 86.5% 530,898 57.8% 43.0 151,919 94.3%
10/14/2021 203.4 309,146 46.6% 92.1 219,887 85.8% 529,033 57.6% 42.5 147,442 91.5%
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%
10/15/2020 199.4 247,569 37.4% 87.7 145,198 56.6% 392,767 42.7% 43.7 158,306 98.3%
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
10/14/2021 133 1,966 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
10/14/2021 0 0 9,327 772 27,042 10/15/2021 7:15 AM 7.50
WEATHER RELATED INFORMATION
  Choke Canyon Reservoir Lake Corpus Christi CCR/LCC Combined
  10/14/2021 MTD YTD 10/14/2021 MTD YTD 10/14/2021 MTD YTD
Air Temp 86     82        
Evaporation 266 3,112 64,499 109 2,866 56,718 375 5,978 121,217
Rainfall 0.15 0.47 27.39 0.28 2.18 36.18      
Stream Flows
Gauging Station 10/14/2021 MTD
NTRT Nueces River at Three Rivers, Texas 90 1,753
NRTT Nueces River at Tilden, Texas 0 0
FRTT Frio River at Tilden, Texas 0 1
SMTT San Miguel Creek at Tilden, Texas 0 0
ARWT Atascosa River at Whitsett, Texas 19 654
CCR Release from Choke Canyon Reservoir 58 806
NRMT Nueces River at Mathis, Texas (La Fruta Bridge) 133 2,887
NCAT Nueces River at Calallen, Texas 0 4,233
RBP Rincon Bayou Pipeline 0 0
Reservoir InFlow
Computed as: (NTRT+FRTT+SMTT)-Release from Choke Canyon 32 949
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   949
Reservoir Inflow 949
Estuary Inflows (NCAT + RBP) 4,233
Passthru Surplus / -Deficit 3,948
Report Generated 10/15/2021 at 8:25:45 AM