Daily Reservoir and Pass-Thru Status Report
August 19, 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%
08/19/2021 204.4 325,645 49.1% 93.0 236,887 92.4% 562,532 61.2% 43.9 160,156 99.4%
08/18/2021 204.5 327,318 49.4% 93.0 236,887 92.4% 564,205 61.4% 43.9 160,156 99.4%
07/19/2021 205.0 335,741 50.7% 93.1 238,806 93.2% 574,547 62.5% 44.0 161,085 100.0%
08/19/2020 200.1 257,729 38.9% 88.4 156,028 60.9% 413,757 45.0% 43.6 157,385 97.7%
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
08/18/2021 80 1,978 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
08/18/2021 65 607 7,591 502 28,413 08/19/2021 7:15 AM 7.57
WEATHER RELATED INFORMATION
  Choke Canyon Reservoir Lake Corpus Christi CCR/LCC Combined
  08/18/2021 MTD YTD 08/18/2021 MTD YTD 08/18/2021 MTD YTD
Air Temp 96     96        
Evaporation 350 6,028 46,637 368 5,157 42,331 718 11,185 88,968
Rainfall 0.00 0.68 24.01 0.00 1.29 30.23      
Stream Flows
Gauging Station 08/18/2021 MTD
NTRT Nueces River at Three Rivers, Texas 594 11,581
NRTT Nueces River at Tilden, Texas 292 3,875
FRTT Frio River at Tilden, Texas 0 185
SMTT San Miguel Creek at Tilden, Texas 0 1,457
ARWT Atascosa River at Whitsett, Texas 33 3,732
CCR Release from Choke Canyon Reservoir 58 1,036
NRMT Nueces River at Mathis, Texas (La Fruta Bridge) 200 3,208
NCAT Nueces River at Calallen, Texas 17 268
RBP Rincon Bayou Pipeline 0 0
Reservoir InFlow
Computed as: (NTRT+FRTT+SMTT)-Release from Choke Canyon 536 12,187
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 12,187
Estuary Inflows (NCAT + RBP) 268
Passthru Surplus / -Deficit -1,732
Report Generated 9/1/2021 at 4:38:59 PM