Daily Reservoir and Pass-Thru Status Report
May 1, 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%
05/01/2021 197.1 216,196 32.6% 85.2 109,768 42.8% 325,964 35.5% 43.0 151,919 94.3%
04/30/2021 196.9 213,589 32.2% 85.2 109,768 42.8% 323,357 35.2% 42.4 146,555 91.0%
04/01/2021 197.4 220,142 33.2% 85.8 117,754 45.9% 337,896 36.8% 42.9 151,018 93.8%
05/01/2020 202.1 288,289 43.5% 89.6 175,504 68.5% 463,793 50.5% 41.0 134,434 83.5%
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
04/30/2021 72 2,289 0 4,208 27,232 0 4,500 7,500
COLORADO RIVER WATER SUPPLY (CRWT)
Date Daily
Intake
MTD YTD Daily Flow MTD Flow Date Time Gage Height
04/30/2021 57 1,494 5,936 2,799 40,484 05/01/2021 7:15 AM 9.40
WEATHER RELATED INFORMATION
  Choke Canyon Reservoir Lake Corpus Christi CCR/LCC Combined
  04/30/2021 MTD YTD 04/30/2021 MTD YTD 04/30/2021 MTD YTD
Air Temp 71     73        
Evaporation 38 5,794 16,629 53 4,589 15,524 91 10,383 32,153
Rainfall 0.82 0.95 2.95 1.51 1.61 3.89      
Stream Flows
Gauging Station 04/30/2021 MTD
NTRT Nueces River at Three Rivers, Texas 54 1,662
NRTT Nueces River at Tilden, Texas 0 0
FRTT Frio River at Tilden, Texas 1 2
SMTT San Miguel Creek at Tilden, Texas 0 0
ARWT Atascosa River at Whitsett, Texas 4 38
CCR Release from Choke Canyon Reservoir 58 1,727
NRMT Nueces River at Mathis, Texas (La Fruta Bridge) 172 4,602
NCAT Nueces River at Calallen, Texas 0 82
RBP Rincon Bayou Pipeline 0 0
Reservoir InFlow
Computed as: NRTT+FRTT+SMTT+ARWT 4 41
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   15
Return Flow Credit Effective   500
Required Passthru Monthly Target 1,200   41
Reservoir Inflow 41
Estuary Inflows (NCAT + RBP) 82
Passthru Surplus / -Deficit 0
Report Generated 5/1/2021 at 7:43:05 AM