Daily Reservoir and Pass-Thru Status Report
May 17, 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%
05/17/2021 198.7 237,738 35.9% 86.2 123,267 48.1% 361,005 39.3% 44.5 161,085 100.0%
05/16/2021 198.2 230,875 34.8% 85.8 117,754 45.9% 348,629 37.9% 43.9 160,156 99.4%
04/17/2021 197.1 216,196 32.6% 85.5 113,719 44.4% 329,915 35.9% 42.7 149,224 92.6%
05/17/2020 202.0 286,713 43.3% 89.5 173,834 67.8% 460,547 50.1% 43.9 160,156 99.4%
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
April YTD Remaining April YTD Remaining
05/16/2021 67 1,692 2,289 6,497 24,943 0 4,500 7,500
COLORADO RIVER WATER SUPPLY (CRWT)
Date Daily
Intake
MTD YTD Daily Flow MTD Flow Date Time Gage Height
05/16/2021 68 450 4,893 1,199 124,410 05/17/2021 7:15 AM 8.31
WEATHER RELATED INFORMATION
  Choke Canyon Reservoir Lake Corpus Christi CCR/LCC Combined
  05/16/2021 MTD YTD 05/16/2021 MTD YTD 05/16/2021 MTD YTD
Air Temp 80     79        
Evaporation 194 3,741 20,370 0 3,037 18,561 194 6,778 38,931
Rainfall 0.24 5.61 8.56 1.52 4.58 8.47      
Stream Flows
Gauging Station 05/16/2021 MTD
NTRT Nueces River at Three Rivers, Texas 3,017 11,368
NRTT Nueces River at Tilden, Texas 254 254
FRTT Frio River at Tilden, Texas 875 5,427
SMTT San Miguel Creek at Tilden, Texas 2,263 8,771
ARWT Atascosa River at Whitsett, Texas 1,036 9,425
CCR Release from Choke Canyon Reservoir 58 921
NRMT Nueces River at Mathis, Texas (La Fruta Bridge) 468 2,777
NCAT Nueces River at Calallen, Texas 111 1,190
RBP Rincon Bayou Pipeline 0 0
Reservoir InFlow
Computed as: (NTRT+FRTT+SMTT)-Release from Choke Canyon 6,098 24,645
ESTUARY INFLOWS AND PASSTHRU REQUIREMENTS
Target Passthru Monthly Target 1,200   1,200
Salinity Relief Credit 0 Effective  
Credit / -Deficit From Previous Month Date Deficit Satisfied   85
Return Flow Credit Effective   500
Required Passthru Monthly Target 1,200   1,200
Reservoir Inflow 24,645
Estuary Inflows (NCAT + RBP) 1,190
Passthru Surplus / -Deficit 575
Report Generated 5/17/2021 at 8:22:24 AM