Daily Reservoir and Pass-Thru Status Report
May 19, 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%
05/19/2021 199.5 249,001 37.6% 87.0 134,734 52.6% 383,735 41.7% 44.0 161,085 100.0%
05/18/2021 198.9 240,518 36.3% 86.7 130,369 50.9% 370,887 40.4% 44.0 161,085 100.0%
04/19/2021 197.1 216,196 32.6% 85.3 111,076 43.3% 327,272 35.6% 42.5 147,442 91.5%
05/19/2020 202.0 286,713 43.3% 89.5 173,834 67.8% 460,547 50.1% 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
April YTD Remaining April YTD Remaining
05/18/2021 132 1,915 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
05/18/2021 0 494 4,937 1,677 127,366 05/19/2021 7:15 AM 8.95
WEATHER RELATED INFORMATION
  Choke Canyon Reservoir Lake Corpus Christi CCR/LCC Combined
  05/18/2021 MTD YTD 05/18/2021 MTD YTD 05/18/2021 MTD YTD
Air Temp 86     85        
Evaporation 234 4,211 20,840 334 3,562 19,086 568 7,773 39,926
Rainfall 0.87 6.66 9.61 0.04 5.95 9.84      
Stream Flows
Gauging Station 05/18/2021 MTD
NTRT Nueces River at Three Rivers, Texas 2,124 16,767
NRTT Nueces River at Tilden, Texas 208 1,038
FRTT Frio River at Tilden, Texas 6,650 15,272
SMTT San Miguel Creek at Tilden, Texas 397 9,791
ARWT Atascosa River at Whitsett, Texas 506 11,605
CCR Release from Choke Canyon Reservoir 58 1,036
NRMT Nueces River at Mathis, Texas (La Fruta Bridge) 158 3,312
NCAT Nueces River at Calallen, Texas 721 2,756
RBP Rincon Bayou Pipeline 49 49
Reservoir InFlow
Computed as: (NTRT+FRTT+SMTT)-Release from Choke Canyon 9,113 40,795
ESTUARY INFLOWS AND PASSTHRU REQUIREMENTS
Target Passthru Monthly Target 10,551   10,551
Salinity Relief Credit 0 Effective  
Credit / -Deficit From Previous Month Date Deficit Satisfied   85
Return Flow Credit Effective   500
Required Passthru Monthly Target 10,551   10,551
Reservoir Inflow 40,795
Estuary Inflows (NCAT + RBP) 2,806
Passthru Surplus / -Deficit -7,160
Report Generated 5/19/2021 at 9:22:40 AM