Deep Eddy is the oldest swimming pool in Texas and features a bathhouse built during the Depression era by the Works Progress Administration.

[6] George Rowley, a partner of Eilers and a former movie theater owner from San Antonio, was hired to manage the business; he and his family moved into the caretaker's house on the property.

The act, which was performed regularly each evening, saw Lorena, astride her horse, dive off a specially built platform into a canvas-lined tank 30 to 50 feet below.

[11] Less than a month after the purchase, a massive flood on the Colorado River destroyed the bathhouse and other improvements, and filled the pool with mud and debris.

[7] The new bathhouse was a mixture of Moderne and Rustic architectural styles; a relatively simple, L-shaped, single story building of rough-hewn and locally quarried limestone.

[12] The "pagoda-like roof",[13] consisting of three metal platforms of decreasing size topped with a twenty-foot spire, covered only the reception area at the intersection of the two wings where swimmers paid their entry fees.

At the center of this area sat an octagonal wood and limestone ticket counter, and above it hung a "wagon wheel, ringed with lights, suspended by chains.

[14] Using less space, the new bathhouse could accommodate more bathers than the private dressing rooms or cabanas which it replaced, and this economy was "passed on to the public through lower usages fees.

[18] After the Natural Science Center moved to Zilker Park in the 1980s, the building was used as office space until it was discovered that structural problems with the roof made it unsafe to occupy.

The project also included the widening of the pool deck, the addition of another pump outlet, as well as a new wrought iron fence and new lifeguard stands.

[29] Over time, the repurposed portions of the bathhouse, namely the original entryway and women's dressing room, fell into disrepair and were boarded up.

In 2002, the Friends of Deep Eddy, a non-profit association of swimmers and other parks advocates, began a fundraising campaign to renovate the bathhouse to its historic condition.

[30] At that point the group had raised $315,000 of the $1 million needed to restore the bathhouse, with most of the money coming from individual donors, proceeds from special events, and T-shirt sales.

A concrete-cooling system, which pumps cold water from the pool beneath the floor of the lobby, was installed to keep the room comfortable during the summertime without the use of air conditioning.