Daily Reservoir and Pass-Thru Status Report
August 23, 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%
08/23/2021 204.4 325,645 49.1% 93.0 236,887 92.4% 562,532 61.2% 43.8 159,229 98.8%
08/22/2021 204.4 325,645 49.1% 93.0 236,887 92.4% 562,532 61.2% 43.8 159,229 98.8%
07/23/2021 204.9 334,048 50.4% 93.1 238,806 93.2% 572,854 62.3% 43.9 160,156 99.4%
08/23/2020 200.0 256,259 38.7% 88.3 154,458 60.3% 410,717 44.7% 43.4 155,551 96.6%
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
July YTD Remaining July YTD Remaining
08/22/2021 77 2,285 3,013 9,857 21,583 0 12,000 0
COLORADO RIVER WATER SUPPLY (CRWT)
Date Daily
Intake
MTD YTD Daily Flow MTD Flow Date Time Gage Height
08/22/2021 68 877 7,862 512 31,043 08/23/2021 7:15 AM 7.36
WEATHER RELATED INFORMATION
  Choke Canyon Reservoir Lake Corpus Christi CCR/LCC Combined
  08/22/2021 MTD YTD 08/22/2021 MTD YTD 08/22/2021 MTD YTD
Air Temp 95     94        
Evaporation 389 7,625 48,234 379 6,361 43,535 768 13,986 91,769
Rainfall 0.00 0.68 24.01 0.00 1.29 30.23      
Stream Flows
Gauging Station 08/22/2021 MTD
NTRT Nueces River at Three Rivers, Texas 222 12,810
NRTT Nueces River at Tilden, Texas 80 4,416
FRTT Frio River at Tilden, Texas 0 185
SMTT San Miguel Creek at Tilden, Texas 0 1,457
ARWT Atascosa River at Whitsett, Texas 28 3,851
CCR Release from Choke Canyon Reservoir 58 1,266
NRMT Nueces River at Mathis, Texas (La Fruta Bridge) 158 3,878
NCAT Nueces River at Calallen, Texas 0 307
RBP Rincon Bayou Pipeline 0 0
Reservoir InFlow
Computed as: (NTRT+FRTT+SMTT)-Release from Choke Canyon 165 13,185
ESTUARY INFLOWS AND PASSTHRU REQUIREMENTS
Target Passthru Monthly Target 5,000   5,000
Salinity Relief Credit 0 Effective  
Credit / -Deficit From Previous Month Date Deficit Satisfied   2,500
Return Flow Credit Effective 08/01/2021 500
Required Passthru Monthly Target 5,000   5,000
Reservoir Inflow 13,185
Estuary Inflows (NCAT + RBP) 307
Passthru Surplus / -Deficit -1,693
Report Generated 9/1/2021 at 4:40:29 PM