Daily Reservoir and Pass-Thru Status Report
July 11, 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%
07/11/2021 204.7 330,674 49.9% 92.5 227,383 88.7% 558,057 60.7% 43.9 160,156 99.4%
07/10/2021 204.6 328,994 49.6% 92.3 223,623 87.2% 552,617 60.1% 43.9 160,156 99.4%
06/11/2021 204.5 327,318 49.4% 91.9 216,174 84.3% 543,492 59.1% 44.0 161,085 100.0%
07/11/2020 201.1 272,748 41.1% 89.0 165,614 64.6% 438,362 47.7% 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
07/10/2021 78 1,125 348 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
07/10/2021 0 428 6,454 10,183 61,749 07/11/2021 7:15 AM 14.11
WEATHER RELATED INFORMATION
  Choke Canyon Reservoir Lake Corpus Christi CCR/LCC Combined
  07/10/2021 MTD YTD 07/10/2021 MTD YTD 07/10/2021 MTD YTD
Air Temp 87     88        
Evaporation 186 1,850 34,082 165 1,657 31,113 351 3,507 65,195
Rainfall 0.00 5.83 22.95 0.00 7.76 27.69      
Stream Flows
Gauging Station 07/10/2021 MTD
NTRT Nueces River at Three Rivers, Texas 2,561 8,144
NRTT Nueces River at Tilden, Texas 328 541
FRTT Frio River at Tilden, Texas 728 896
SMTT San Miguel Creek at Tilden, Texas 1,155 3,522
ARWT Atascosa River at Whitsett, Texas 1,796 4,020
CCR Release from Choke Canyon Reservoir 58 576
NRMT Nueces River at Mathis, Texas (La Fruta Bridge) 121 5,034
NCAT Nueces River at Calallen, Texas 3,831 13,375
RBP Rincon Bayou Pipeline 231 2,296
Reservoir InFlow
Computed as: (NTRT+FRTT+SMTT)-Release from Choke Canyon 4,387 11,986
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 11,986
Estuary Inflows (NCAT + RBP) 15,671
Passthru Surplus / -Deficit 7,505
Report Generated 7/11/2021 at 10:41:43 AM