Marina Structures
Slips, walkways, breakwater and access structures for the lake's marina operators — commercial work, on commercial terms, under the applicable Corps authorization.
Lakes We Serve · Hill Country, TX
Canyon Lake: what can actually be built on this shoreline.
Start with the fact nobody selling waterfront wants to lead with — there are no private docks on Canyon Lake, and the Corps of Engineers removes the ones that appear anyway. Here is the honest map of what is possible instead.
The Rule That Governs Everything
The Corps owns the water's edge, and it is closed.
This is the opposite of most Texas lakes, and it is the single most important thing to understand before buying, planning or hiring here.
1
No private or exclusive use of public land
The Corps states that any type of private or exclusive use of public land is prohibited — specifically including docks, boat houses, boat ramps and cart paths. There is a moratorium on constructing anything on federal property: no gazebos, steps, ramps, roads, docks or porches. Unauthorized existing structures are required to be removed at the owner's expense.
2
And a longer list besides
Also prohibited on public land: leaving personal property out for more than 24 hours, constructing buildings, roads or improved pathways, restricting public access, operating motorized vehicles including golf carts and ATVs, and removing trees or shrubs to improve a lake view.
3
Three things you may apply for
A permit to mow a 3-foot path down to the 909 line — two cuts a year, renewed annually. A permit to remove flood debris, with no heavy equipment. And a License to run a water intake line to the lake, which requires Guadalupe-Blanco River Authority water rights first and prohibits submersible pumps. That is the list.
4
Where the door actually opens: flowage easement land
Below roughly the 948-foot contour lies private land the government holds a perpetual flooding easement over. With a written Consent issued by the Corps, most structures may be built there — excluding habitable or commercial buildings, anything causing a loss of flood storage capacity, and petroleum or hazardous product storage. Fill added must be offset by removing the same amount, and no work of any kind may start before the Consent is signed by all parties.
Reading Your Own Ground
Three different rulebooks apply between your house and the water.
Federal fee land, flowage easement land and ordinary private upland — and the lines between them are not always where people assume.
Federal fee land is everything inundated at the 909.0-foot conservation pool plus a strip of varying width around it, bounded by the U.S. boundary line and marked on the ground with brass-capped concrete monuments. This is the closed ground described above.
Flowage easement land is private property subject to a perpetual government flooding easement, generally below the 948-foot contour. But the easement is often described by metes and bounds rather than following that contour, so a deed history review is frequently necessary before anyone can say where it ends. Mowing, clearing, planting that does not alter the natural grade, and permeable fencing to the boundary line are allowed without consent. Structures for human habitation or commercial purposes are prohibited outright, as is placing fill or altering the easement contour. Septic systems must sit at least 75 horizontal feet upslope of the 940-foot contour, and the Corps will not allow septic tanks below 948. The 50-year floodplain is 940 feet.
Private upland above the government boundary is ordinary property, and Comal County handles permits there. Retaining walls, slope stabilization and erosion control on that ground do not depend on a Corps Consent at all — which is why, on a lake like this, most of the honest private work sits above the line rather than below it. If you are unsure which category your frontage falls into, the Canyon Lake Project Office will arrange a field appointment with a ranger to walk the boundary.
909.0′
Conservation pool, ft msl
940′
50-year floodplain
948′
Approx. flowage easement contour
0
Private docks permitted
Scope of Work
What Shoretech can honestly do at Canyon Lake.
Not private docks. Commercial and public marine work, and private work above the government line.
Public & Commercial Facilities
Boat ramps, park facilities and bank protection under Corps contract, in a lake with 23 ramps and eight Corps lakeside parks to maintain.
Retaining Walls & Erosion Control
Slope stabilization and retaining walls on private upland above the government boundary — steel, vinyl, FRP composite or heavy timber, matched to rock and soil.
Flowage-Easement Structures
Non-habitable structures on flowage easement land where the Corps issues a written Consent — designed to the flood storage and fill-offset conditions that Consent carries.
Around the Lake
Limestone, clear water and a big residential community.
Canyon Lake impounds the Guadalupe River in Comal County — 8,308 acres at conservation pool, deep, clear and walled in rock.
Construction began in 1958, deliberate impoundment on June 16, 1964, and the project was complete by 1968; the dam is generally dated to 1964. The banks are Hill Country limestone — rock ledges, rock piles, steep drop-offs and steep rocky shoreline, with isolated flooded timber and laydowns up in the river section. Water is clear to slightly stained, more stained in the upper reservoir. Because it is rock rather than soil, foundations are drilled and pinned rather than driven. TPWD gives maximum depth as about 125 feet, while some secondary sources say 134; shoreline is commonly cited at 80 miles, with about 93 miles appearing elsewhere, and the Corps does not publish a figure.
Communities
- Canyon Lake, the census-designated place
- Sattler
- Startzville
- Cranes Mill
- Hancock and Canyon City
- Fischer
- Spring Branch
- New Braunfels, about 16 miles southeast
Parks, ramps and marinas
- Eight Corps lakeside parks in all
- Comal Park, near Startzville
- Canyon Park, on the north shore
- Overlook Park, where the Corps project office sits
- 23 boat ramps
- Cranes Mill Marina and Canyon Lake Marina
- Campgrounds, hiking trails, golf courses and a country club
Whether any facility predating the Corps' 1986 shoreline rules remains permitted at Canyon Lake specifically is not something this page will claim either way — the Canyon Lake Project Office is the authority on that, and the published FAQ describes a flat construction moratorium.
Questions We Hear
Canyon Lake FAQ.
Can I build a private dock or boathouse on Canyon Lake?
No. The Corps of Engineers prohibits any private or exclusive use of public land at Canyon Lake, specifically including docks, boat houses, boat ramps and cart paths, and there is a moratorium on constructing anything on federal property — no gazebos, steps, ramps, roads, docks or porches. Unauthorized structures are required to be removed at the owner's expense. Anyone telling you otherwise is mistaken.
What can an adjacent landowner do on the public land in front of the house?
A narrow, permit-based list: mow a 3-foot path down to the 909 line, cut twice a year and renewed annually; remove flood debris, with no heavy equipment; and a License to run a water intake line, which needs GBRA water rights first and prohibits submersible pumps. Leaving property out more than 24 hours, restricting public access, driving golf carts or ATVs, and cutting trees for a lake view are all prohibited.
What is flowage easement land, and can I build on it?
It is private land the government holds a perpetual flooding easement over, generally below the 948-foot contour — though the easement is often written by metes and bounds rather than following that contour, so a deed history review is frequently needed. With a written Corps Consent most structures may be built there, excluding habitable or commercial buildings, anything causing a loss of flood storage capacity, and petroleum or hazardous product storage. No work may start before the Consent is signed by all parties.
Who do I talk to about the boundary line?
The Canyon Lake Project Office, 601 C.O.E. Road, Canyon Lake, TX 78133, (830) 964-3341, weekdays 8:00 to 4:30. Boundary questions can be resolved with a field appointment with a Corps ranger — the U.S. boundary line is marked on the ground with brass-capped concrete monuments. The Guadalupe-Blanco River Authority holds the water rights but does not control shoreline construction, and Comal County handles permits on private upland. For the wider picture, see Can I build on my lake?
Nearby Water
Guadalupe River lakes and Hill Country neighbours.
Start With a Conversation
Working on something at Canyon Lake?
If it is a marina, a public facility, a flowage-easement structure or bank work above the government line, Dave can help. If someone has told you a private dock is possible here, call before you spend anything.