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Idea

Deep Eddy Pool

One-line summary: Texas's oldest swimming pool (1915), built into a natural eddy of the Colorado River on the south face of a limestone bluff — spring-fed, hand-built by the Civilian Conservation Corps in 1936, ~30 yds long with a separate wading pool, refreshingly cold even in August, and a much smaller, less crowded counterpart to Barton Springs.

Deep Eddy Pool

One-line summary: Texas's oldest swimming pool (1915), built into a natural eddy of the Colorado River on the south face of a limestone bluff — spring-fed, hand-built by the Civilian Conservation Corps in 1936, ~30 yds long with a separate wading pool, refreshingly cold even in August, and a much smaller, less crowded counterpart to Barton Springs.

Scope note: this template covers steps 1–3 of the adventures pipeline (identify, support Maxine's research, shape goals). The deliverable webpage

  • video at step 6 is Maxine's own work — don't scaffold it here.

Links & Maps

Official:

Maps:

Reference & background:

  • Deep Eddy began as a private "Resort" with bathhouses, a Ferris wheel, and zip lines in the 1910s–1930s. The CCC rebuilt it into the public pool in 1936.
  • Deep Eddy: An Austin Legend (Sara K. Hines; local self-published history, available in Austin libraries).

Must-See / Big Items

  1. The 1936 CCC bathhouse — National Register-listed; native limestone, heavy timber. Architecture lesson in the CCC vernacular found in nearly every Texas state park.
  2. The pool's water source — fed by an artesian well drilled into the Edwards/Trinity aquifer, plus a small natural spring. Cold (~65–70°F) and clear. Not chlorinated municipal water.
  3. The separate wading pool — kid-shallow, but the construction (mosaic floor, stone coping) is original CCC work, worth a close look.
  4. The bluff face above the pool — exposed limestone, you can see the bedding planes. Same Cretaceous strata as Barton Springs and Mount Bonnell.
  5. The wood platform / observation deck — old photos in the bathhouse show this used to be where the high dive was. Compare then/now.
  6. The little lawn south of the pool — the spot for the towel-and-book afternoon. Hill Country live oaks overhead.

Stretch goals (do if time allows):

  • Walk west on the Roy & Ann Butler Hike and Bike Trail to the Pfluger Pedestrian Bridge.
  • Cross MoPac to Eilers Park for the historic spring outflow.
  • Pair with a Lake Austin Blvd lunch (Hula Hut, Mozart's).

Research angles for Maxine

The research is hers — list questions to investigate and sources to start from, not answers. Pitch above grade level.

Hook into Maxine's current interests: (ask before finalizing — what is she into right now? bend the questions to that.)

Questions worth chasing:

  • Science / hydrology: Deep Eddy's water comes from a well drilled into the same aquifer system as Barton Springs but on the other side of the Colorado River. How does the Balcones Fault Zone divide the local groundwater into separate compartments? Where does the well draw from — Edwards, Glen Rose, or Trinity?
  • History: The CCC (1933–1942) built dozens of Texas swimming pools, parks, and infrastructure. Pick three CCC-built sites in central Texas (Bastrop, Pedernales Falls, Garner) and compare construction technique. What did the CCC standardize, and what was site-specific?
  • Writing: Find a 1920s newspaper article on the old Deep Eddy Resort (Austin History Center has them). Use one as primary source for a 500-word essay on early Austin leisure culture.
  • Math: Estimate the pool's volume (~30 yd long × 20 yd wide × avg 5 ft deep). Convert to gallons. At the published well discharge rate, how long to fill?
  • Art: Photograph the 1936 stone-and-timber bathhouse from three angles. The CCC architectural style is replicated dozens of times in Texas — what makes it instantly recognizable?

Starting sources (not exhaustive — she'll find more):

Observable field goals

  • Measure water temperature on entry; compare to air temperature.
  • Identify the well outlet vs. the spring outflow — confirm with staff.
  • Photograph one CCC stonework detail (e.g., a quoin, a window arch, a corner stair) at high resolution.
  • Sketch one bedding plane on the bluff above the pool; estimate thickness.
  • Find one CCC tool mark or chisel signature in the masonry (they exist).

Suggested itinerary

  1. 9:00 a.m. Arrive; mid-morning is empty.
  2. 9:15 a.m. Cold-water swim — full lap if she can, document temperature.
  3. 10:30 a.m. CCC bathhouse + bluff geology survey.
  4. 11:30 a.m. Lawn break.
  5. 12:30 p.m. Out; lunch on Lake Austin Blvd; afternoon at Mount Bonnell or Mayfield Park.

Family roles:

  • Chris leads: the CCC history / Balcones Fault hydrology read.
  • Heather leads: the swim; water-safety call.
  • Maxine drives: the temperature/volume math; the bathhouse architectural photo set.
  • Solo vs. both parents: fine with one.

Connections

Combines well with:

Feeds into home projects / future adventures:

  • A CCC-in-Texas project — survey several CCC sites, write the architectural-history essay.
  • A Balcones aquifer-compartment project, contrasting Deep Eddy (north of Colorado River) with Barton Springs (south).

Open questions / still to research (Chris's side)

  • 2026 annual cleaning dates.
  • Charging-season start/end (same schedule as Barton Springs).
  • Whether the historic photos / interpretive signage in the bathhouse are still up.