Daily Reservoir and Pass-Thru Status Report
July 12, 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%
07/12/2021 204.8 332,359 50.1% 92.6 229,272 89.4% 561,631 61.1% 43.9 160,156 99.4%
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%
06/12/2021 204.5 327,318 49.4% 91.9 216,174 84.3% 543,492 59.1% 44.0 161,085 100.0%
07/12/2020 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
07/11/2021 78 1,203 348 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
07/11/2021 0 428 6,454 11,573 73,322 07/12/2021 7:15 AM 16.53
WEATHER RELATED INFORMATION
  Choke Canyon Reservoir Lake Corpus Christi CCR/LCC Combined
  07/11/2021 MTD YTD 07/11/2021 MTD YTD 07/11/2021 MTD YTD
Air Temp 89     90        
Evaporation 265 2,115 34,347 287 1,944 31,400 552 4,059 65,747
Rainfall 0.00 5.83 22.95 0.00 7.76 27.69      
Stream Flows
Gauging Station 07/11/2021 MTD
NTRT Nueces River at Three Rivers, Texas 3,236 11,380
NRTT Nueces River at Tilden, Texas 316 857
FRTT Frio River at Tilden, Texas 399 1,295
SMTT San Miguel Creek at Tilden, Texas 1,320 4,842
ARWT Atascosa River at Whitsett, Texas 3,732 7,751
CCR Release from Choke Canyon Reservoir 58 633
NRMT Nueces River at Mathis, Texas (La Fruta Bridge) 93 5,128
NCAT Nueces River at Calallen, Texas 2,184 15,558
RBP Rincon Bayou Pipeline 0 2,296
Reservoir InFlow
Computed as: (NTRT+FRTT+SMTT)-Release from Choke Canyon 4,897 16,883
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 16,883
Estuary Inflows (NCAT + RBP) 17,854
Passthru Surplus / -Deficit 9,688
Report Generated 7/12/2021 at 9:01:01 AM