East Fork Trinity HUC8 12030106
A 3,375 km² sub-basin of the Texas-Gulf region in TX. Drought coverage is from the US Drought Monitor (map of 2026-09-01); streamflow classes place each USGS gauge's latest reading against its own day-of-year record.
Health score
64
Moderate
Drought index
231
Severe
Area in D2+
31.07%
0% exceptional (D4)
Gauges below normal
25%
of 8 reporting
Median flow
74%
p33 of record
Water assets
907
4 springs · 256 wells
USGS gauges (12)
- Muddy Ck at Creek Crossing Ln nr Sachse, TX080615480 cfsp10 · below normal
- Indian Ck at SH 78 nr Farmersville, TX0805935057 cfsp24 · below normal
- Wilson Ck Dws of Hwy 75 at McKinney, TX080595901 cfsp26 · normal
- E Fk Trinity Rv blw Lk Ray Hubbard nr Forney, TX0806155126 cfsp32 · normal
- Rowlett Ck nr Sachse, TX0806154025 cfsp34 · normal
- Sister Grove Ck nr Blue Ridge, TX080594000 cfsp51 · normal
- E Fk Trinity Rv nr Crandall, TX0806200074 cfsp58 · normal
- E Fk Trinity Rv nr McKinney, TX080590004 cfsp60 · normal
- E Fk Trinity Rv nr Lavon, TX08061000275 cfsno long-term record
- Squabble Ck at Shores Blvd nr Rockwall, TX080614800 cfsno long-term record
- E Fk Trinity Rv nr Forney, TX0806175061 cfsno long-term record
- E Fk Trinity Rv abv Seagoville, TX0806197076 cfsno long-term record
Recent conditions
| Date | DSCI | D2+ % | Gauges low | Flow pct |
|---|---|---|---|---|
| 2026-09-07 | 231 | 31.07 | 2/8 | p33 |
Top water assets
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- 66East Fork Above Lavon Ws Scs Site 39 Damreservoir
- 66Rowlett Creek Ws Scs Site 7 Damreservoir
- 66Sister Grove Creek Ws Scs Site 5 Damreservoir
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- 66East Fork Above Lavon Ws Scs Site 3B Damreservoir