Daily Reservoir and Pass-Thru Status Report
October 30, 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%
10/30/2021 203.0 302,657 45.7% 92.0 218,027 85.1% 520,684 56.6% 43.7 158,306 98.3%
10/29/2021 203.0 302,657 45.7% 92.0 218,027 85.1% 520,684 56.6% 43.6 157,385 97.7%
09/30/2021 203.6 312,414 47.1% 92.0 218,027 85.1% 530,441 57.7% 42.8 150,120 93.2%
10/30/2020 199.1 243,319 36.7% 87.6 143,682 56.1% 387,001 42.1% 43.3 154,639 96.0%
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
September YTD Remaining September YTD Remaining
10/29/2021 134 4,012 3,474 16,318 15,122 0 12,000 0
COLORADO RIVER WATER SUPPLY (CRWT)
Date Daily
Intake
MTD YTD Daily Flow MTD Flow Date Time Gage Height
10/29/2021 0 0 9,327 2,263 150,846 10/30/2021 7:15 AM 9.13
WEATHER RELATED INFORMATION
  Choke Canyon Reservoir Lake Corpus Christi CCR/LCC Combined
  10/29/2021 MTD YTD 10/29/2021 MTD YTD 10/29/2021 MTD YTD
Air Temp 77     77        
Evaporation 310 6,644 68,031 292 6,447 60,299 602 13,091 128,330
Rainfall 0.00 0.52 27.44 0.00 2.76 36.76      
Stream Flows
Gauging Station 10/29/2021 MTD
NTRT Nueces River at Three Rivers, Texas 75 4,186
NRTT Nueces River at Tilden, Texas 0 0
FRTT Frio River at Tilden, Texas 1 21
SMTT San Miguel Creek at Tilden, Texas 0 99
ARWT Atascosa River at Whitsett, Texas 2 1,460
CCR Release from Choke Canyon Reservoir 58 1,669
NRMT Nueces River at Mathis, Texas (La Fruta Bridge) 179 4,933
NCAT Nueces River at Calallen, Texas 0 4,287
RBP Rincon Bayou Pipeline 0 0
Reservoir InFlow
Computed as: (NTRT+FRTT+SMTT)-Release from Choke Canyon 18 2,637
ESTUARY INFLOWS AND PASSTHRU REQUIREMENTS
Target Passthru Monthly Target 9,000   9,000
Salinity Relief Credit 0 Effective  
Credit / -Deficit From Previous Month Date Deficit Satisfied 10/01/2021 164
Return Flow Credit Effective   500
Required Passthru Monthly Target 9,000   2,637
Reservoir Inflow 2,637
Estuary Inflows (NCAT + RBP) 4,287
Passthru Surplus / -Deficit 2,314