Daily Reservoir and Pass-Thru Status Report
November 20, 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%
11/20/2021 202.6 296,231 44.7% 91.6 210,649 82.2% 506,880 55.1% 43.4 155,551 96.6%
11/19/2021 202.7 297,831 44.9% 91.7 212,485 82.9% 510,316 55.5% 43.4 155,551 96.6%
10/20/2021 203.3 307,518 46.4% 92.2 221,752 86.5% 529,270 57.6% 43.6 157,385 97.7%
11/20/2020 198.8 239,125 36.1% 87.2 137,687 53.7% 376,812 41.0% 42.7 149,224 92.6%
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
October YTD Remaining October YTD Remaining
11/19/2021 131 2,522 4,285 20,603 10,837 0 12,000 0
COLORADO RIVER WATER SUPPLY (CRWT)
Date Daily
Intake
MTD YTD Daily Flow MTD Flow Date Time Gage Height
11/19/2021 0 0 9,327 1,677 47,193 11/20/2021 7:15 AM 8.69
WEATHER RELATED INFORMATION
  Choke Canyon Reservoir Lake Corpus Christi CCR/LCC Combined
  11/19/2021 MTD YTD 11/19/2021 MTD YTD 11/19/2021 MTD YTD
Air Temp 67     68        
Evaporation 130 2,927 71,353 107 3,016 63,821 237 5,943 135,174
Rainfall 0.00 0.78 28.22 0.00 0.33 37.09      
Stream Flows
Gauging Station 11/19/2021 MTD
NTRT Nueces River at Three Rivers, Texas 77 1,515
NRTT Nueces River at Tilden, Texas 0 0
FRTT Frio River at Tilden, Texas 0 4
SMTT San Miguel Creek at Tilden, Texas 0 0
ARWT Atascosa River at Whitsett, Texas 2 106
CCR Release from Choke Canyon Reservoir 58 1,094
NRMT Nueces River at Mathis, Texas (La Fruta Bridge) 179 3,147
NCAT Nueces River at Calallen, Texas 0 63
RBP Rincon Bayou Pipeline 0 0
Reservoir InFlow
Computed as: (NTRT+FRTT+SMTT)-Release from Choke Canyon 19 425
ESTUARY INFLOWS AND PASSTHRU REQUIREMENTS
Target Passthru Monthly Target 4,000   4,000
Salinity Relief Credit 0 Effective  
Credit / -Deficit From Previous Month Date Deficit Satisfied 11/01/2021 2,000
Return Flow Credit Effective   500
Required Passthru Monthly Target 4,000   425
Reservoir Inflow 425
Estuary Inflows (NCAT + RBP) 63
Passthru Surplus / -Deficit 0
Report Generated 11/20/2021 at 8:54:17 AM