Daily Reservoir and Pass-Thru Status Report
July 13, 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%
07/13/2021 205.0 335,741 50.7% 92.8 233,068 90.9% 568,809 61.9% 43.9 160,156 99.4%
07/12/2021 204.8 332,359 50.1% 92.6 229,272 89.4% 561,631 61.1% 43.9 160,156 99.4%
06/13/2021 204.5 327,318 49.4% 91.9 216,174 84.3% 543,492 59.1% 44.0 161,085 100.0%
07/13/2020 201.1 272,748 41.1% 88.9 163,995 64.0% 436,743 47.5% 44.0 161,085 100.0%
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
June YTD Remaining June YTD Remaining
07/12/2021 78 1,281 348 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
07/12/2021 0 428 6,454 7,106 80,428 07/13/2021 7:15 AM 13.83
WEATHER RELATED INFORMATION
  Choke Canyon Reservoir Lake Corpus Christi CCR/LCC Combined
  07/12/2021 MTD YTD 07/12/2021 MTD YTD 07/12/2021 MTD YTD
Air Temp 89     90        
Evaporation 277 2,392 34,624 166 2,110 31,566 443 4,502 66,190
Rainfall 0.00 5.83 22.95 0.00 7.76 27.69      
Stream Flows
Gauging Station 07/12/2021 MTD
NTRT Nueces River at Three Rivers, Texas 4,605 15,985
NRTT Nueces River at Tilden, Texas 292 1,149
FRTT Frio River at Tilden, Texas 486 1,781
SMTT San Miguel Creek at Tilden, Texas 1,237 6,078
ARWT Atascosa River at Whitsett, Texas 3,057 10,808
CCR Release from Choke Canyon Reservoir 20 653
NRMT Nueces River at Mathis, Texas (La Fruta Bridge) 0 5,128
NCAT Nueces River at Calallen, Texas 1,010 16,569
RBP Rincon Bayou Pipeline 0 2,296
Reservoir InFlow
Computed as: (NTRT+FRTT+SMTT)-Release from Choke Canyon 6,308 23,192
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 23,192
Estuary Inflows (NCAT + RBP) 18,864
Passthru Surplus / -Deficit 10,698
Report Generated 7/13/2021 at 10:39:29 AM