Daily Reservoir and Pass-Thru Status Report
October 22, 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%
10/22/2021 203.2 305,894 46.2% 92.2 221,752 86.5% 527,646 57.4% 43.4 155,551 96.6%
10/21/2021 203.3 307,518 46.4% 92.2 221,752 86.5% 529,270 57.6% 43.5 156,467 97.1%
09/22/2021 203.6 312,414 47.1% 92.2 221,752 86.5% 534,166 58.1% 43.1 152,823 94.9%
10/22/2020 199.3 246,145 37.1% 87.8 146,723 57.2% 392,868 42.7% 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
10/21/2021 137 2,932 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
10/21/2021 0 0 9,327 4,367 128,495 10/22/2021 7:15 AM 11.06
WEATHER RELATED INFORMATION
  Choke Canyon Reservoir Lake Corpus Christi CCR/LCC Combined
  10/21/2021 MTD YTD 10/21/2021 MTD YTD 10/21/2021 MTD YTD
Air Temp 83     86        
Evaporation 161 4,657 66,044 174 4,390 58,242 335 9,047 124,286
Rainfall 0.00 0.47 27.39 0.00 2.75 36.75      
Stream Flows
Gauging Station 10/21/2021 MTD
NTRT Nueces River at Three Rivers, Texas 92 3,557
NRTT Nueces River at Tilden, Texas 0 0
FRTT Frio River at Tilden, Texas 4 11
SMTT San Miguel Creek at Tilden, Texas 0 99
ARWT Atascosa River at Whitsett, Texas 11 1,422
CCR Release from Choke Canyon Reservoir 58 1,209
NRMT Nueces River at Mathis, Texas (La Fruta Bridge) 166 3,682
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 38 2,457
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   2,457
Reservoir Inflow 2,457
Estuary Inflows (NCAT + RBP) 4,287
Passthru Surplus / -Deficit 2,494
Report Generated 10/22/2021 at 8:39:42 AM