Daily Reservoir and Pass-Thru Status Report
October 31, 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%
10/31/2021 203.0 302,657 45.7% 91.9 216,174 84.3% 518,831 56.4% 43.7 158,306 98.3%
10/30/2021 203.0 302,657 45.7% 92.0 218,027 85.1% 520,684 56.6% 43.7 158,306 98.3%
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%
10/31/2020 199.1 243,319 36.7% 87.5 142,172 55.5% 385,491 41.9% 43.3 154,639 96.0%
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
October YTD Remaining October YTD Remaining
10/30/2021 134 4,145 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
10/30/2021 0 0 9,327 2,104 152,950 10/31/2021 7:15 AM 9.13
WEATHER RELATED INFORMATION
  Choke Canyon Reservoir Lake Corpus Christi CCR/LCC Combined
  10/30/2021 MTD YTD 10/30/2021 MTD YTD 10/30/2021 MTD YTD
Air Temp 82     81        
Evaporation 169 6,813 68,200 226 6,673 60,525 395 13,486 128,725
Rainfall 0.00 0.52 27.44 0.00 2.76 36.76      
Stream Flows
Gauging Station 10/30/2021 MTD
NTRT Nueces River at Three Rivers, Texas 75 4,261
NRTT Nueces River at Tilden, Texas 0 0
FRTT Frio River at Tilden, Texas 0 22
SMTT San Miguel Creek at Tilden, Texas 0 99
ARWT Atascosa River at Whitsett, Texas 2 1,463
CCR Release from Choke Canyon Reservoir 58 1,727
NRMT Nueces River at Mathis, Texas (La Fruta Bridge) 170 5,102
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 18 2,655
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   2,655
Reservoir Inflow 2,655
Estuary Inflows (NCAT + RBP) 4,287
Passthru Surplus / -Deficit 2,296
Report Generated 10/31/2021 at 9:07:24 AM