Boathouses and retaining walls on Lake Cypress Springs.

That structure changes the whole transaction. The person applying for a shoreline permit here is a tenant of the District, not an owner whose deed runs to the water. FCWD permits every structure on the lake from its office at 112 N. Houston St. in Mount Vernon, on the east side of the square — 903-537-4536, open 8:30 a.m. to 4:30 p.m. Monday through Friday and closed 11:30 to 12:30 for lunch.

The District issues a separate permit for each project: an On Water Facilities Permit for boathouses, piers, EZ Ports and jet ski lifts; a Retaining Wall Dredge Permit for retaining walls, bulkheads and dredging; plus a Paint and Stain Permit, a Building Permit, a Demolition Permit, a Water Pump Permit and a Commercial Work Permit. One permit per permitted project — a boathouse and the wall beneath it are two applications.

And there is a rule that decides who can even bid your job. Under Rules 15.9 and 15.30, only contractors listed on the District's Contractor Registry and in good standing may perform permitted work on District Property. Registration carries an application fee plus an annual update and renewal fee, and requires proof of ownership or authorization for all equipment, including work vessels. Any unresolved permit violation puts a contractor out of good standing and blocks new permits — which means on this lake a contractor's paperwork history is part of what you are buying.

Rule 15.3 adds a federal layer on top: all dredging, filling and retaining wall activities must be performed in accordance with all applicable U.S. Army Corps of Engineers regulations and permits, and soil-disturbing work has to use erosion controls such as silt fencing and rock gabions.

An on-water facility is capped at 40 feet of total combined length including porches and decks, 2,000 square feet of covered area and 3,000 square feet in total, one story, and 25 feet above 378 msl. Only one fixed facility is permitted per lot, and only on a lot that already carries a single-family residence — an empty lot does not get a boathouse first.

Below that, the details are just as specific. The deck floor must be at least 24 inches above 378.00 ft msl. Boat lifts must maintain a 16-foot internal range and jet ski lifts 12 feet. A 40-foot clear channel has to be preserved. Note the second elevation running through the Rules: 385.0 to 385.50 feet msl is the reference for backfill sourcing, for floating lift flotation and for finished floor. Two governing datums, not one — and mixing them up is how a design gets rejected.

The bottom is sand and clay. Water is clear under normal conditions, and Lake Cypress Springs is one of the few East Texas lakes without established hydrilla, thanks to grass carp stocking — aquatic vegetation covers under 10 percent of the surface. Structure is riprap near the dam, terrestrial brush and trees along the shorelines, and a great many boat houses.

FCWD releases downstream to meet its water supply obligation, primarily to the City of Mount Pleasant at 3,590 acre-feet a year, and its Drought Contingency Plan suspends lakeside water pumping permits at the severe stage — worth knowing if a project includes an irrigation intake.

Two scheduling constraints matter before anyone quotes a job. No permitted commercial activity is allowed during Memorial Day, Independence Day or Labor Day weekends. And no more than two commercial work barges may be on the lake at any one time — on a lake with roughly 850 waterfront homes, that is a genuine queue in the busy season. Between the barge cap, the holiday blackouts, the pre- and post-dredge inspections and the As-Built Survey at the end, a Lake Cypress Springs project is planned around the District's calendar, not just the weather.