Daily Reservoir and Pass-Thru Status Report
January 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%
01/01/2021 198.4 233,606 35.2% 86.8 131,815 51.4% 365,421 39.8% 44.0 161,085 100.0%
12/31/2020 198.4 233,606 35.2% 86.8 131,815 51.4% 365,421 39.8% 44.0 161,085 100.0%
12/01/2020 198.9 240,518 36.3% 87.2 137,687 53.7% 378,205 41.1% 43.8 159,229 98.8%
01/01/2020 202.8 299,436 45.2% 90.7 194,426 75.8% 493,862 53.7% 39.2 119,655 74.3%
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
December YTD Remaining December YTD Remaining
12/31/2020 101 3,197 2,559 27,600 3,840 0 4,500 7,500
COLORADO RIVER WATER SUPPLY (CRWT)
Date Daily
Intake
MTD YTD Daily Flow MTD Flow Date Time Gage Height
12/31/2020 33 978 14,502 9,588 38,072 01/01/2021 7:15 AM 14.20
WEATHER RELATED INFORMATION
  Choke Canyon Reservoir Lake Corpus Christi CCR/LCC Combined
  12/31/2020 MTD YTD 12/31/2020 MTD YTD 12/31/2020 MTD YTD
Air Temp 45     48        
Evaporation 128 2,939 78,074 85 3,300 69,721 213 6,239 147,795
Rainfall 0.18 0.55 24.14 0.10 0.93 31.9      
Stream Flows
Gauging Station 12/31/2020 MTD
NTRT Nueces River at Three Rivers, Texas 66 1,962
NRTT Nueces River at Tilden, Texas 0 0
FRTT Frio River at Tilden, Texas 1 3
SMTT San Miguel Creek at Tilden, Texas 0 0
ARWT Atascosa River at Whitsett, Texas 7 245
CCR Release from Choke Canyon Reservoir 58 1,785
NRMT Nueces River at Mathis, Texas (La Fruta Bridge) 166 4,254
NCAT Nueces River at Calallen, Texas 0 231
RBP Rincon Bayou Pipeline 0 0
Reservoir InFlow
Computed as: (NTRT+FRTT+SMTT)-Release from Choke Canyon 9 199
ESTUARY INFLOWS AND PASSTHRU REQUIREMENTS
Target Passthru Monthly Target 3,745   3,745
Salinity Relief Credit 0 Effective  
Credit / -Deficit From Previous Month Date Deficit Satisfied   221
Return Flow Credit Effective   500
Required Passthru Monthly Target 3,745   199
Reservoir Inflow 199
Estuary Inflows (NCAT + RBP) 231
Passthru Surplus / -Deficit 0
Report Generated 1/2/2021 at 10:38:15 AM