Lake Texoma lies on the Red River at and below its confluence with the Washita, behind Denison Dam. Construction began in 1939, impoundment followed in 1943–44, and the project came into service in 1944. It spans Grayson and Cooke counties in Texas and Bryan, Marshall, Johnston and Love counties in Oklahoma — and the federal government owns the shoreline around essentially all of it.
That reshapes what a Texoma "waterfront" lot actually is. The lot normally stops well short of the water. The strip between your property line and the lake is government land, and a dock or boathouse reaching across it exists under a revocable permit rather than as an improvement to real estate you own.
Private docks, boathouses and vegetation modification are authorized through a Shoreline Use Permit, applied for on SWT Form 1133 and filed with the U.S. Army Corps of Engineers, Tulsa District — Lake Texoma Project Office, 351 Corps Rd., Denison, TX 75020, (903) 465-4990. The submittal is specific: two sets of structural plans on 8.5 x 11 paper, proof of legal access to the site, a detailed site map showing the proposed location, and notarized copies of boat registrations.
Recent history matters here too. The Corps imposed a moratorium on new shoreline use permits in March 2020 while it rewrote the Shoreline Management Plan. The 2021 plan was finalized and applications reopened on 1 May 2021, with new private floating facilities taken first come, first served.
The decisive detail is allocation. Permits are issued only where the Shoreline Management Plan classifies that reach for limited development, and neighbouring properties can fall on opposite sides of that line. Confirming the classification for your specific frontage is the first phone call, before a drawing exists. What the current plan allows for private bulkheads and retaining walls on Corps ground is a question for the project office as well — it does not follow from what is ordinary on a privately owned Texas lake, and Shoretech will not assume an answer on your behalf.