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Floatability Levels
# Below minimum
1 Minimum water available for floating, some portaging or lining through shallows necessary
2 Satisfactory water conditions, no lining necessary
3 Ideal water conditions for floating
4 Water level approaching hazardous conditions
5 Maximum water flow - for experts only
F River in flood

Observation Point Floatability levels Reference
segment
Forecast
group
1 2 3 4 5 F
Northeast Waterways
Neches River
Alto @ SH 21 500 1,000 1,500 2,000 5,000 12,000 ATOT2
Sabine River
Gladewater @ US 271 500 1,000 1,500 2,000 5,000 6,000 GDWT2
North Central Waterways
Brazos River
Possum Kingdom Dam 200 500 1,200 3,000 5,000 20,000 PSMT2
Dennis @ FM 1543 200 500 1,200 3,000 5,000 20,000 DNNT2
Granbury Dam 200 500 1,200 3,000 5,000 20,000 GBYT2
Whitney Dam 200 500 1,200 3,000 5,000 20,000 WTYT2
Trinity River
Clear Fork - Benbrook Dam 70 140 280 500 1,200 3,000 BNBT2
Denton Creek - Grapevine Dam 60 125 280 350 500 2,000 GPVT2
Elm Fork - Lewisville Dam 100 400 700 1,000 2,000 3,000 LEWT2
Southeast Waterways
Angelina River
Sam Rayburn Dam 500 1,000 2,000 5,000 10,000 12,000 JSPT2
Neches River
Town Bluff Dam 500 1,000 2,000 5,000 10,000 15,000 TBLT2
Village Creek
Kountze @ FM 418 200 400 700 1,500 2,000 5,000 KOUT2
Sabine River
Toledo Bend 500 1,000 2,000 5,000 10,000 20,000 BKLT2
Trinity River
Livingston Dam 500 1,000 2,000 5,000 10,000 20,000 LVDT2
South Central Waterways
Colorado River
San Saba @ US 190 100 250 750 2,000 5,000 15,000 SNBT2
Austin @ US 183 200 500 1,000 3,000 5,000 12,000 ACRT2
Frio River
Garner State Park 60 100 120 450 650 1,000 CNCT2
Guadalupe River
Spring Branch @ FM 311 125 250 450 750 1,200 2,000 SRGT2
Canyon Dam 125 250 450 750 1,200 5,000 SMCT2
Cuero @ US 77A/87/183 200 800 1,000 2,000 3,000 5,000 CUET2
Lampasas River
Stillhouse Hollow Dam 100 200 300 700 1,000 3,000 STIT2
Llano River
Llano @ SH 16 250 500 1,000 2,000 3,000 5,000 LLAT2
Pedernales River
Johnson City @ US 281 125 250 400 700 1,200 5,000 JOCT2
San Antonio River
Falls City @ FM 791 250 450 600 1,000 1,500 3,000 FACT2
San Marcos River
San Marcos (below Blanco) 100 150 300 700 1,200 3,000 LLGT2
Luling @ SH 80 100 150 300 700 1,200 3,000 LLGT2
Western Waterways
Rio Grande
Presidio @ International Bridge 300 500 1,000 1,200 1,500 3,000 PRST2
Boquillas 300 500 1,000 1,200 1,500 3,000 BOQT2
Pecos River
Pandale Crossing @ FM 1865 125 300 500 900 1,500 3,000 PDAT2

National Weather Service
West Gulf River Forecast Center
3401 Northern Cross Blvd.
Fort Worth, TX 76137
Web Master's E-mail: SR-FWR.Webmaster@noaa.gov
Page last modified: August 07, 2006
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