Daily Reservoir and Pass-Thru Status Report
July 18, 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%
07/18/2021 205.0 335,741 50.7% 93.1 238,806 93.2% 574,547 62.5% 44.0 161,085 100.0%
07/17/2021 205.0 335,741 50.7% 93.1 238,806 93.2% 574,547 62.5% 43.9 160,156 99.4%
06/18/2021 204.5 327,318 49.4% 91.9 216,174 84.3% 543,492 59.1% 44.0 161,085 100.0%
07/18/2020 200.9 269,701 40.7% 88.8 162,385 63.3% 432,086 47.0% 43.7 158,306 98.3%
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
June YTD Remaining June YTD Remaining
07/17/2021 78 1,670 348 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
07/17/2021 0 428 6,454 3,216 100,715 07/18/2021 7:15 AM 10.77
WEATHER RELATED INFORMATION
  Choke Canyon Reservoir Lake Corpus Christi CCR/LCC Combined
  07/17/2021 MTD YTD 07/17/2021 MTD YTD 07/17/2021 MTD YTD
Air Temp 89     91        
Evaporation 346 3,804 36,036 280 3,352 32,808 626 7,156 68,844
Rainfall 0.00 5.84 22.96 0.00 7.8 27.73      
Stream Flows
Gauging Station 07/17/2021 MTD
NTRT Nueces River at Three Rivers, Texas 844 25,475
NRTT Nueces River at Tilden, Texas 194 3,190
FRTT Frio River at Tilden, Texas 173 3,092
SMTT San Miguel Creek at Tilden, Texas 35 6,787
ARWT Atascosa River at Whitsett, Texas 100 13,401
CCR Release from Choke Canyon Reservoir 58 941
NRMT Nueces River at Mathis, Texas (La Fruta Bridge) 187 6,114
NCAT Nueces River at Calallen, Texas 69 17,672
RBP Rincon Bayou Pipeline 0 2,296
Reservoir InFlow
Computed as: (NTRT+FRTT+SMTT)-Release from Choke Canyon 994 34,413
ESTUARY INFLOWS AND PASSTHRU REQUIREMENTS
Target Passthru Monthly Target 4,500   2,250
Salinity Relief Credit 2,250 Effective 07/11/2021
Credit / -Deficit From Previous Month Date Deficit Satisfied   -6,416
Return Flow Credit Effective   500
Required Passthru Monthly Target 2,250   2,250
Reservoir Inflow 34,413
Estuary Inflows (NCAT + RBP) 19,968
Passthru Surplus / -Deficit 11,802
Report Generated 7/18/2021 at 8:57:02 AM