Lake Austin · Austin, Texas
Hydrilla removal Lake Austin.
Hydrilla Removal Lake Austin for docks, swim lanes, and boat lifts. Manual, chemical-free, TPWD-aligned. We bag every fragment and haul weeds off the bank so cuttings do not restart a colony next door.
Lake Austin hydrilla vs. your dock
Lake Austin is a pass-through Highland Lakes reservoir between Mansfield Dam and Tom Miller Dam, and a drinking-water source for the City of Austin. When hydrilla chokes a slip, wraps a boat lift, or fills the swim area, lake-wide grass carp can reduce acreage over seasons. They rarely keep a private shoreline usable week to week. Herbicides are not allowed on this lake.
Hydrilla Hunters ATX handles the water in front of your house: hand removal, fragment control, haul-away, and optional lake blankets on cleared bottom. That is the practical layer while the City of Austin manages the reservoir as a whole.
How hydrilla grew here
Hydrilla first covered about an eighth of Lake Austin from 1999 to 2003. Sterile grass carp became the city’s lake-wide tool starting in 2003. After the 2010–2013 drought, overstocking wiped nearly all aquatic plants around 2014. The lake spent about a decade recovering — which is why the city now stocks cautiously.
Summer 2025 was a different problem. TPWD measured about 74 acres of hydrilla in June, then about 456 acres (~30% of the lake) by September. City staff point to the July 2025 floods: floodwater stored upstream in Lake Travis sent sediment and nutrients into Lake Austin during peak growing season, while warm, low-flow water let stands take hold instead of flushing them out.
The June 2026 TPWD survey found about 575 acres of hydrilla (~36%) plus 75 acres of Eurasian watermilfoil. Invasives covered about 40.6% of the lake. The city’s target band for aquatic vegetation is 10–30%.
Where it is worst
The upper five miles — Mansfield Dam to the Lake Austin Spa — is often dense bank to bank. Bull Creek and Bee Creek Cove increased in the 2026 surveys. Ski Shores declined. The middle lake from Commons Ford Park to Emma Long is generally thinner.
Hydrilla (Hydrilla verticillata) is the dominant invasive. It can canopy from the bottom to the surface, tangle props, and spread from a single fragment. Texas lists it as a prohibited exotic species.
Eurasian watermilfoil shows up in slower coves. Filamentous green algae often coats hydrilla in late winter and spring. Mats left to rot recycle nutrients that feed the next flush. We remove nuisance algae with the weeds when it is part of the same shoreline job.
Who regulates Lake Austin work
The City of Austin Watershed Protection Department sets lake-wide hydrilla policy — primarily sterile grass carp. Physical removal on public water still typically needs an approved nuisance aquatic vegetation treatment proposal from TPWD. That is different from other Highland Lakes, where LCRA is also a local controlling authority alongside TPWD.
Unpermitted commercial removal can put the property owner on the hook. Ask any contractor for the permit and the treatment proposal before anyone enters the water. Our hiring checklist covers the questions to ask.
Why cutting is not enough
Hydrilla stores energy in tubers. Cutting the canopy is like mowing a weed and leaving the root. Fragments drift, root, and start new colonies — often on your neighbor’s dock. City guidance for shoreline owners is mechanical or manual removal with proper disposal: dry, bag, or compost plants off the bank. We haul biomass out so it does not sit on the lawn or wash back in.
Grass carp help the lake. Stockings in July 2025, November 2025, and May 2026 brought the population toward about eight fish per acre of hydrilla. They graze slowly and do not replace a dock crew. If your lift, pump intake, or kids’ swim lane is packed, you still need localized work — which is the method the city itself recommends for dock relief.
- Lake Austin
- Steiner Ranch
- Westlake
- West Lake Hills
- Tarrytown
- Rollingwood
- Emma Long area
- Red Bud Isle
- Bull Creek
- Bee Creek
- Ski Shores
- Austin, TX
Fall 2026 drawdown
The City of Austin and LCRA scheduled a Lake Austin drawdown from October 12 through November 30, 2026, lowering the lake about 10 feet so owners can repair docks, bulkheads, and shoreline structures. Lower water can make hydrilla around docks easier to reach. It is not a lake-wide hydrilla cure — tubers survive, and city staff have said a drawdown can even favor hydrilla by reducing competing plants. If you plan to clear weeds while the lake is down, TPWD permits may still apply.
Read the Lake Austin drawdown hydrilla guide for dates, what owners can do, and how we work during low water.
Do you remove hydrilla on Lake Austin?
Yes. We clean Lake Austin docks, swim areas, and boat lifts for Austin lake houses, including Steiner Ranch, Westlake, West Lake Hills, Tarrytown, Rollingwood, and nearby shorelines. Chemical-free: bag fragments, haul weeds off the bank.
Is a permit required to clear hydrilla from a Lake Austin dock?
On public water, physical removal, treatments, or stocking biological controls typically requires TPWD approval. The City of Austin manages lake-wide policy. We work with permitted methods. See Texas hydrilla regulations.
Will the city’s grass carp clear the weeds at my dock?
Carp reduce hydrilla acreage over seasons. They do not keep a private slip or swim lane reliably clear. Localized manual removal is still the homeowner-scale tool the city itself points residents toward for dock relief.
Need hydrilla off a Lake Austin dock or swim area?