Ridges, rock and septic
Lake lots from the 1930s, septic tanks on rocky ground
A town laid out for a lake that did not exist yet.
Brothers Emmet A. and Warren Jones established the community in the late 1930s, a few years before Mansfield Dam was finished in 1942. The city incorporated in the 1980s. It grew from 1,250 people in 1990 to 2,365 in 2020, and most houses date from the 1970s through the 1990s.
The lots are hilly limestone, often a thin layer of soil over ledge rock. Gravity helps a drain line running downhill to a tank. But the pitch, the rock and roots chasing moisture all decide where a sewer or yard line can go and how it gets repaired.
Near the shore, septic systems answer to LCRA. Since September 1971 it has regulated on-site sewage facilities within a 2,000-foot zone around Lake Travis. A new system needs a soil analysis and a site inspection before LCRA issues an Authorization to Construct, then a Permit to Operate once it passes.
Lake Travis is considered full at 681 feet. In July 2026 it climbed above that line, and LCRA opened Mansfield Dam floodgates for the first time since 2019. A drain field near the water soaks up that rise, and slow drains in the weeks after usually point to the field rather than the pipe.
Local knowledge
From RM 1431 down to Jones Brothers Park
Roads, parks and the jobs that come up along this part of the north shore.
RM 1431 is the main street, and City Hall sits right on it. Cedar Park is about eight miles east, Marble Falls about 30 miles west, and Lago Vista is the next town along the shore. Depending on the street, children attend Leander ISD or Lago Vista ISD.
Jones Brothers Park, on the Sandy Creek arm, holds the city’s three public boat ramps and a trailhead for the Canyonlands Trail. After the summer rise, the city’s ramp page still listed two of the three ramps closed while the lake receded.
Most calls here are shaped by the slope and the tank. A toilet that gurgles every time the washer drains. A house-to-tank line that sagged where fill was placed on a cut slope. A water heater in a lower-level garage now well into its second decade.
