The Double Bayou watershed starts in southern Liberty County and drains to the East and West forks of Double Bayou, which join at the southern part of the watershed and discharge into Trinity Bay at Oak Island.
The total Watershed area is 60,723 acres (about 94 square miles). Of that total, 93% of the watershed is in Chambers County and 7% is in Liberty County.
The east and west forks of Double Bayou run through the heart of mid Chambers County and have served witness to some key developments in Texas history, including the founding in 1847 of what became the 26,000-acre JHK Ranch along the East Fork; the birth of a future Texas governor in 1875 along the West Fork; the move of the Chambers County seat to Anahuac in 1907; and the development of the Anahuac oil field in the 1930s.
Today, the lands and waters that make up the Double Bayou watershed provide a snapshot of the much-prized rural Chambers County life: rice farming, cattle grazing, oil production, small town and country living, industry and commercial navigation, sailing, paddling, crabbing, recreational fishing, and wildlife watching. In addition, the waters of Double Bayou drain into Trinity Bay, just up-current from the largest oyster harvesting operation in Texas.