Daily Reservoir and Pass-Thru Status Report
October 1, 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%
10/01/2021 203.6 312,414 47.1% 92.2 221,752 86.5% 534,166 58.1% 42.9 151,018 93.8%
09/30/2021 203.6 312,414 47.1% 92.0 218,027 85.1% 530,441 57.7% 42.8 150,120 93.2%
09/01/2021 204.2 322,313 48.6% 92.8 233,068 90.9% 555,381 60.4% 43.6 157,385 97.7%
10/01/2020 199.7 251,884 38.0% 88.0 149,794 58.4% 401,678 43.7% 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
September YTD Remaining September YTD Remaining
09/30/2021 144 3,474 0 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
09/30/2021 0 865 10,193 1,530 25,978 10/01/2021 7:15 AM 8.13
WEATHER RELATED INFORMATION
  Choke Canyon Reservoir Lake Corpus Christi CCR/LCC Combined
  09/30/2021 MTD YTD 09/30/2021 MTD YTD 09/30/2021 MTD YTD
Air Temp 90     91        
Evaporation 248 9,964 61,387 174 8,006 53,852 422 17,970 115,239
Rainfall 1.03 2.9 26.92 1.40 3.63 34      
Stream Flows
Gauging Station 09/30/2021 MTD
NTRT Nueces River at Three Rivers, Texas 113 2,656
NRTT Nueces River at Tilden, Texas 0 1
FRTT Frio River at Tilden, Texas 0 15
SMTT San Miguel Creek at Tilden, Texas 0 0
ARWT Atascosa River at Whitsett, Texas 31 288
CCR Release from Choke Canyon Reservoir 58 1,727
NRMT Nueces River at Mathis, Texas (La Fruta Bridge) 148 7,470
NCAT Nueces River at Calallen, Texas 36 408
RBP Rincon Bayou Pipeline 0 1,893
Reservoir InFlow
Computed as: (NTRT+FRTT+SMTT)-Release from Choke Canyon 56 944
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   944
Reservoir Inflow 944
Estuary Inflows (NCAT + RBP) 2,301
Passthru Surplus / -Deficit 164
Report Generated 10/1/2021 at 8:06:07 AM