Daily Reservoir and Pass-Thru Status Report
August 20, 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%
08/20/2021 204.5 327,318 49.4% 93.0 236,887 92.4% 564,205 61.4% 43.8 159,229 98.8%
08/19/2021 204.4 325,645 49.1% 93.0 236,887 92.4% 562,532 61.2% 43.9 160,156 99.4%
07/20/2021 204.9 334,048 50.4% 93.1 238,806 93.2% 572,854 62.3% 44.0 161,085 100.0%
08/20/2020 200.2 259,206 39.1% 88.4 156,028 60.9% 415,234 45.2% 43.5 156,467 97.1%
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
08/19/2021 77 2,055 3,013 9,857 21,583 0 12,000 0
COLORADO RIVER WATER SUPPLY (CRWT)
Date Daily
Intake
MTD YTD Daily Flow MTD Flow Date Time Gage Height
08/19/2021 68 674 7,659 377 28,790 08/20/2021 7:15 AM 7.60
WEATHER RELATED INFORMATION
  Choke Canyon Reservoir Lake Corpus Christi CCR/LCC Combined
  08/19/2021 MTD YTD 08/19/2021 MTD YTD 08/19/2021 MTD YTD
Air Temp 96     94        
Evaporation 410 6,438 47,047 234 5,391 42,565 644 11,829 89,612
Rainfall 0.00 0.68 24.01 0.00 1.29 30.23      
Stream Flows
Gauging Station 08/19/2021 MTD
NTRT Nueces River at Three Rivers, Texas 421 12,002
NRTT Nueces River at Tilden, Texas 208 4,084
FRTT Frio River at Tilden, Texas 0 185
SMTT San Miguel Creek at Tilden, Texas 0 1,457
ARWT Atascosa River at Whitsett, Texas 32 3,763
CCR Release from Choke Canyon Reservoir 58 1,094
NRMT Nueces River at Mathis, Texas (La Fruta Bridge) 188 3,396
NCAT Nueces River at Calallen, Texas 15 283
RBP Rincon Bayou Pipeline 0 0
Reservoir InFlow
Computed as: (NTRT+FRTT+SMTT)-Release from Choke Canyon 363 12,550
ESTUARY INFLOWS AND PASSTHRU REQUIREMENTS
Target Passthru Monthly Target 5,000   5,000
Salinity Relief Credit 0 Effective  
Credit / -Deficit From Previous Month Date Deficit Satisfied   2,500
Return Flow Credit Effective 08/01/2021 500
Required Passthru Monthly Target 5,000   5,000
Reservoir Inflow 12,550
Estuary Inflows (NCAT + RBP) 283
Passthru Surplus / -Deficit -1,717
Report Generated 9/1/2021 at 4:39:20 PM