Lake Austin is the exception among the Highland Lakes. The City of Austin writes the shoreline rules here — and one sentence in the Land Development Code means the vertical seawall you may have seen on other lakes is generally not available on this one.
Section 25-2-1174(C): “A bulkhead with a greater than 45 degree vertical slope for any portion greater than one foot in height is not permitted on or adjacent to the shoreline of a lake listed in Section 25-2-1171 unless the shoreline is located within an existing man-made channel.” Outside a man-made channel, Lake Austin gets sloped revetment — not a vertical wall. Everything else follows from that.
Section 25-2-1174(D) bars a wall from capturing or recapturing land beyond the lesser of the shoreline as it existed 10 years before the application, or the platted lot line. A wall here holds a bank; it does not add lot.
A dock may not extend more than 30 feet from the shoreline without Austin Parks and Recreation Board approval, and no lot gets more than two residential docks.
Parks Board approval is required for any structure other than a retaining wall placed within 10 feet of a side property line, or wider than 20 percent of the lot's shoreline width. That governs how a boathouse gets positioned on a narrow lot.
Section 25-2-1176(I) prohibits boat ramp construction outright. If a lot needs launch capability, that conversation starts with the public ramps, not with a private one.
Docks, Bulkheads, and Shoreline Access lives in Land Development Code Chapter 25-2, Article 13, administered by the Development Services Department.
LCRA operates Tom Miller Dam under a long-term lease from the City, which owns the dam site — but LCRA refers Lake Austin dock questions to the City, and Lake Austin is deliberately excluded from LCRA's Highland Lakes Dredge and Fill Ordinance, which names only Buchanan, Inks, LBJ, Marble Falls and Travis. If you have built on one of those lakes, none of that process applies here.
Article 13 reaches every structure and every piece of shoreline work below elevation 504.9 feet msl — roughly twelve feet above the 492.8-foot normal pool. Under §25-2-1173 a person may not modify a shoreline or construct a dock, bulkhead or shoreline access without first obtaining a site plan and a building permit. In practice that means one of two routes: a Site Plan Exemption for straightforward repair and maintenance, or a full Site Plan Permit for new construction and structural change — and then, in both cases, the building permit.
After construction, the structure enters the City's Boat Dock Registration Program: docks carry a registration tag and amber navigation lighting, and registration renews every five years for residential docks and every two for commercial. Useful contacts are Environmental Review at DSDZoningSitePlan@austintexas.gov, Boat Dock Inspections at 512-978-4687, and Austin Parks and Recreation at 512-974-6700 for the approvals the Parks Board holds.
The restriction on vertical walls does not remove the work — it changes its shape. Here is where the effort goes on this lake.
Riprap and sloped revetment at the waterline where a vertical wall is not permitted, plus retaining walls set back on private ground above the shoreline. Inside an existing man-made channel, a conventional bulkhead is back on the table.
New docks and replacements inside the 30-foot reach limit and the two-dock cap, with stairs, walkways and access down the bluff on lots where the house sits well above the water.
Covered structures positioned around the side-setback and lot-width thresholds that trigger Parks Board review, then detailed for a lake that barely moves.
Slip and access dredging in a canyon lake where usable depth is often a matter of clearing rock slide debris and brush rather than moving sediment.
Twenty miles of Colorado River between Tom Miller Dam and Mansfield Dam, with steep rock coming down to the water.
Lake Austin's banks are bluff and ledge. Rock slides come off the bluff faces, boulders and submerged brush piles sit at the toe, and weed beds of watermilfoil and pondweed line the shallows. The water runs clear to slightly stained. Zebra mussels are established, which matters for anything left submerged — flotation, lift cables, hardware and intake screens all get specified with that in mind.
The level, by contrast, is about as friendly as Texas gets. Normal elevation is 492.8 feet msl, with an LCRA target operating range of 491.8 to 492.8 feet. The lake moves only slightly with turbine releases from Mansfield Dam, 21 miles upstream, so a fixed pier or a fixed-height structure can be built tight to the waterline without designing for a large seasonal swing. LCRA does lower Lake Austin periodically for maintenance — sometimes in tandem with Lake LBJ — and those windows are when shoreline and slip work gets done in the dry.
Some of the most expensive waterfront in Texas, running from downtown out to the Travis County line.
Lake Austin impounds the Colorado River behind Tom Miller Dam in Travis County; the dam was built between 1938 and 1940. Published surface acreage differs — LCRA gives 1,830 acres at normal elevation and Texas Parks & Wildlife lists 1,599 — and no agency publishes a total shoreline mileage, only the lake's 20.25-mile length and 1,300-foot maximum width.
Usually not. Section 25-2-1174(C) says a bulkhead with a greater than 45 degree vertical slope, for any portion greater than one foot in height, is not permitted on or adjacent to the shoreline unless the shoreline is located within an existing man-made channel. Outside a man-made channel, Lake Austin gets sloped revetment, riprap and set-back retaining structures rather than a conventional vertical wall.
For dock and shoreline permitting it is a City of Austin lake. LCRA operates Tom Miller Dam under a long-term lease from the City, which owns the dam site, but LCRA refers Lake Austin dock questions to the City. Lake Austin is also deliberately excluded from LCRA's Highland Lakes Dredge and Fill Ordinance, which names only Buchanan, Inks, LBJ, Marble Falls and Travis.
A dock may not extend more than 30 feet from the shoreline without approval from the Austin Parks and Recreation Board, and no more than two residential docks are allowed per lot. Parks Board approval is also required for a structure other than a retaining wall built within 10 feet of a side property line, or wider than 20 percent of the lot's shoreline width. Building a boat ramp is prohibited outright under Section 25-2-1176(I).
Yes. Lake Austin sits at a normal elevation of 492.8 feet msl with an LCRA target operating range of 491.8 to 492.8 feet, moving only slightly with turbine releases from Mansfield Dam 21 miles upstream. A fixed-height structure can be built tight to the waterline without designing around a large seasonal swing. LCRA does lower the lake periodically for maintenance, sometimes in tandem with Lake LBJ, and that is the window for work in the dry.
Yes. Shoretech is based in Trinity and works across Texas and western Louisiana, and Dave travels as far as a project warrants. Call 936-662-5100 to talk through access, scope and the Article 13 route for your frontage.
Tell Dave whether your frontage is open lake or an existing man-made channel, how the bank falls to the water, and what you want at the waterline. That single distinction decides most of the design here.