Daily Reservoir and Pass-Thru Status Report
July 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%
07/31/2021 204.8 332,359 50.1% 93.1 238,806 93.2% 571,165 62.1% 44.0 161,085 100.0%
07/30/2021 204.8 332,359 50.1% 93.1 238,806 93.2% 571,165 62.1% 44.0 161,085 100.0%
07/01/2021 204.2 322,313 48.6% 91.4 206,995 80.8% 529,308 57.6% 43.7 158,306 98.3%
07/31/2020 200.6 265,171 40.0% 89.0 165,614 64.6% 430,785 46.9% 44.1 161,085 100.0%
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
July YTD Remaining July YTD Remaining
07/30/2021 141 2,872 348 6,844 24,596 3,816 12,000 0
COLORADO RIVER WATER SUPPLY (CRWT)
Date Daily
Intake
MTD YTD Daily Flow MTD Flow Date Time Gage Height
07/30/2021 0 959 6,984 1,255 125,208 07/31/2021 7:15 AM 8.74
WEATHER RELATED INFORMATION
  Choke Canyon Reservoir Lake Corpus Christi CCR/LCC Combined
  07/30/2021 MTD YTD 07/30/2021 MTD YTD 07/30/2021 MTD YTD
Air Temp 92     92        
Evaporation 334 7,964 40,196 381 7,361 36,817 715 15,325 77,013
Rainfall 0.00 6.21 23.33 0.00 9.01 28.94      
Stream Flows
Gauging Station 07/30/2021 MTD
NTRT Nueces River at Three Rivers, Texas 441 35,486
NRTT Nueces River at Tilden, Texas 12 3,904
FRTT Frio River at Tilden, Texas 1 3,258
SMTT San Miguel Creek at Tilden, Texas 4 7,450
ARWT Atascosa River at Whitsett, Texas 54 15,260
CCR Release from Choke Canyon Reservoir 58 1,689
NRMT Nueces River at Mathis, Texas (La Fruta Bridge) 262 8,196
NCAT Nueces River at Calallen, Texas 0 17,891
RBP Rincon Bayou Pipeline 0 2,296
Reservoir InFlow
Computed as: (NTRT+FRTT+SMTT)-Release from Choke Canyon 388 44,562
ESTUARY INFLOWS AND PASSTHRU REQUIREMENTS
Target Passthru Monthly Target 4,500   1,125
Salinity Relief Credit 3,375 Effective 07/19/2021
Credit / -Deficit From Previous Month Date Deficit Satisfied   -6,416
Return Flow Credit Effective   500
Required Passthru Monthly Target 1,125   1,125
Reservoir Inflow 44,562
Estuary Inflows (NCAT + RBP) 20,186
Passthru Surplus / -Deficit 13,145
Report Generated 7/31/2021 at 7:43:19 AM