A 1928 experimental concrete reservoir for storing Permian Basin oil became a water park in 1958 — for one day.
Travelers on I-20 in West Texas should not miss the petroleum museum at Monahans southwest of Odessa and Midland. Not just a collection of Permian Basin artifacts, the Million Barrel Museum’s biggest attraction is a former experimental oil tank the size of three football fields.
The Permian Basin once was called a “petroleum graveyard” — until a series of oilfield discoveries beginning in 1920 brought exploration companies to the vast, arid region. Completed near Big Lake in 1923, the Santa Rita No. 1 well alone would endow the University of Texas with millions of dollars.
However, as the giant basin’s oilfield discoveries grew, the lack of infrastructure for storing and transporting growing volumes of oil proved to be an equally big problem.
The Million Barrel Museum’s 525-foot by 422-foot main attraction, originally built to store Permian Basin oil in 1928, became a water park for one day in 1958. Photo courtesy newswest9.com 2024 video, “Exploring Million Barrel Tank and its Museum of Memories.”
“There were great oil discoveries around 1926 and few places to put the oil. No pipelines or tanks,” explained Elizabeth Heath, chairwoman of the Ward County Historical Commission, in 2010.
A single well in the Hendricks field could produce 500 barrels of oil a day. “Unfortunately, the Roxana Petroleum Company — later absorbed by Shell Oil — did not have a pipeline to get all that oil to a refinery,” added journalist Mike Cox in his 2006 “Texas Tales” column. To solve the problem, the company decided to build a giant concrete reservoir.
Paved with cement, the experimental 35-foot-deep tank covers eight acres. It once included a domed roof of California redwood and a network of lightning rods. Photo courtesy Top of Texas Gazette.
Using mule-drawn equipment, workers completed an excavation and laid wire mesh over the packed earth, Cox explained. Contractors then started pouring tons of concrete.
The museum in Monahans, Texas, tells the story of how a lack of pipelines during 1920s West Texas oil discoveries led to construction of the massive tank. Photo courtesy Texas Historical Commission.
“By late April 1928 workers hammered away at a wooden cover for the colossal tank, placing creosote-soaked support timbers at 14-foot intervals across the sprawling reservoir floor,” Cox reported. The timbers supported a domed redwood roof covered with tar paper. Completion of the walls, pillars, and roof took just three months because construction took place 24 hours a day.
“When Roxana injected a million barrels of oil into the tank, the weight bearing down on the concrete amounted to four hundred million pounds of pressure,” Cox noted. “One thing Roxana’s engineers forgot to take into consideration was the weight of crude.” One gallon of oil weighs nearly eight pounds.
Founded in 1881, Monahans incorporated two years after oil was discovered in 1926.
“It seemed like a good idea at the time,” added Ward County historian Elizabeth Heath. She said a Monahans High School math teacher measured the dimensions of the storage tank at 525 feet by 422 feet. Its concrete-covered earthen walls rose 30 feet tall with a slope of 45 degrees. When finished, problems quickly emerged.
“It didn’t work. It leaked from too many places, and the company couldn’t seal it properly,” Heath explained. “When workers poured the cement, they did it in sections, so it made seams all around. You didn’t have caulking like we have today, so oil seeped into the sand.”
Artist’s conception of the million-barrel reservoir with timbers at 14-foot intervals supporting a redwood roof. Courtesy Ward County Historical Commission.
Although the Monahans oil storage facility soon became known as the “million barrel reservoir,” engineers had designed it to hold “a staggering five million barrels of oil,” Cox claimed. It was filled with one million barrels just once.
Despite the tank’s domed, California redwood roof — which included a network of lightning rods — oil also began to evaporate. According to Heath, Shell Oil pumped out the oil and dismantled the wooden structures soon after the start of the Great Depression. Much of the tank’s redwood lumber reportedly ended up in Monahans homes and businesses.
Empty and abandoned, the tank gaped on Monahans’ east side for decades.
Water Park for a Day
Then in 1954, Wayne and Amalie Long purchased the concrete reservoir from Shell. The entrepreneurial Monahans couple had an idea. The Longs believed in the tank’s potential as a community attraction — a water park. To fill the tank, Wayne Long pumped water from wells he drilled nearby.
About 35 miles west of Odessa, Texas, the Million Barrel Museum features railroad memorabilia in addition to artifacts from the surrounding oilfields.
Workers constructed a boat ramp from an opening oil company engineers had carved to remove the interior pillars and the roof. On opening day, October 5, 1958, the one-of-a-kind, man-made lake, which the Longs named “Melody Park,” attracted swimmers, boaters, skiers, and anglers. A professional ski team from Austin put on an exhibition.
Leaks at the seams forced the water park to close after just one day.
Ward County’s Oil Museum
A 2006 letter by Wallace Dickey Jr., nephew of the Longs, offered a first-hand account of what happened next. “I was there in the summer of 1958, when I was in high school, when they tried to turn it into a stock car racetrack after it would not hold water long enough for fishing and swimming,” Dickey explained. The reservoir was no more.
After his uncle died in 1980, his aunt eventually donated it to Ward County. Left unattended for a few years, Monahans High School students enjoyed visiting the site at night, some adding graffiti to the concrete.
A new chance for life arrived in 1986, when Amalie Long donated the structure and the more than 14 acres surrounding it to the Ward County Historical Commission.
The museum includes a hotel once at the terminus of Monahans-Ft. Stockton Stage Line.
“Her husband wanted it to be a community project, something we could work on for local history,” Heath noted. The community rallied behind the idea of creating a museum. With the help of local teachers and historians, construction of the Million Barrel Museum began in 1986 as part of the Ward County sesquicentennial.
The museum opened with much fanfare on May 30, 1987.
Geologist’s House
By the early 2000s, the museum grounds included the Holman House, carefully moved from west Monahans, farming equipment, a railroad caboose and memorabilia – and oilfield artifacts from the surrounding oilfields. The Holman House, built in 1909, became a hotel and, for a time, a hospital.
Eugene Holman, who grew up in Monahans, was chief geologist for Humble Oil Company in 1926. As president of Standard Oil Company of New Jersey, he appeared on the cover of TIME, which proclaimed the Monahanian its International Oilman of 1947.
In 1960, the American Petroleum Institute awarded Holman the API gold medal of distinguished achievement, which “recognizes exceptional leadership and service to the natural gas and oil industry, the communities in which the industry operates, and the broader nation.”
API’s first gold medal was awarded in 1946 to Henry Ford, founder of Ford Motor Company.
Eugene Holman, who grew up in Monahans, was president of Standard Oil of New Jersey when TIME featured him in 1947.
A section of the tank’s wall is now the Meadows Amphitheater and includes a rebuilt roof similar to the original. The imposing concrete walls have witnessed class reunions, craft shows, and other community events, including an annual Fajita Cook-off and Tejano Dance held in May. The former oil tank also has hosted rock concerts.
On the first weekend of December, the Million Barrel Museum has hosted a Christmas lighting and holiday activities. It is open 10 a.m. to 8 p.m. Tuesday through Saturday, 2 p.m. to 8 p.m. on Sundays in the summer. Admission is free.
Million Barrel Timeline
1923 – The Santa Rita No. 1 uncovers the Big Lake oilfield on land owned by the University of Texas. The discovery led to one of the largest oil booms in the United States. Learn more in Santa Rita taps Permian Basin.
1926-1928 – More discoveries in Ward and Winkler counties (notably the Hendricks oilfield) increase oil production. Storage problems result from a lack of pipelines to reach refineries. In 90 days a 179,500-square-foot concrete oil tank is built in Monahans.
Stretching across the Texas-New Mexico border, Monahans Sandhills State Park attracts tourists to its 200 miles of sand dunes with 70-foot mounds. Photo courtesy Michael Murphy.
1930 – Shell Oil Company abandons use of the tank because of leaks, evaporation – and higher taxes on stored oil.
1935 – Shell Oil removes the roof, pillars, and superstructure.
1940s – The tank becomes a parade ground. Former Monahans resident Eugene Holman is president of Standard Oil Company of New Jersey.
1950s – Dancers and spectators gather in the tank for square dancing and community events.
1954 – Monahan residents Wayne and Amalie Long purchase the tank. They consider its potential for the community.
Concerts at the Monahans oil tank included a 2013 Labor Day “Tribute to a Texas historical treasure.”
1958 – Wayne Long uses water pumped from wells he drilled to create a water park. Professional water skiers from Austin put on a show at the grand opening, October 5. “Melody Park” closes the next day because of leaks.
1960s – 1970s The abandoned tank remains a community landmark — and a site for high school graffiti artists.
1986 – In honor of her late husband, Amalie Long donates the tank and surrounding 14.5 acres to the Ward County Historical Commission. As a class project, local teacher Deolece Parmalee encouraged her students to research the tank’s history and build a scale model.
May 30, 1987 – Grand opening of the Million Barrel Museum. The entrance, funded by the Sid Richardson Foundation, includes two pillars of red sandstone, the same used to build the first Ward County courthouse. Brick paving is from an old carbon black plant. A segment of the tank was later transformed into a 400-seat amphitheater.
2004 Historic Marker
On June 26, 2004, the Texas Historical Commission dedicated a the Million Barrel Tank historic marker at 400 Museum Boulevard in Monahans.
A “Million Barrel Tank” marker was dedicated in 2004. Photo courtesy the Center for Land Use Interpretation (CLUI).
The marker reads: A project of the Shell Oil Company, the construction of this oil storage tank in 1928 was the result of an oil boom in the area. Built to accommodate crude oil until it could be shipped to refineries, the tank was constructed by crews working on a 24-hour schedule using hand operated and horse-drawn equipment. Covering eight acres of land, the tank was able to hold over one million barrels of oil. It was filled to capacity only once. Efforts to convert it into a water-filled recreation center in the 1950s were unsuccessful, and it became a museum in 1986.
It Came from Outer Space
East of the Monahans Sandhills State Park is another attraction. Not to be overlooked by I-20 travelers, the outdoor exhibit rivals the Million Barrel Museum’s in size, but it has an alien origin.
The Odessa Meteor Crater Museum, 30 miles from Monahans, educates visitors about an eroding impact crater 550 feet across and 15 feet deep. Discovered in 1926 and still visible despite wind and rain erosion, the Permian Basin meteor impact site is a national landmark, earning that distinction from the U.S. Department of the Interior in 1965.
“Many residents of Odessa claim they never knew it was in their area, even if they were born and raised here,” notes the museum. which opened in 2002. The crater is ranked 27th out of the nation’s 29 impact craters in size — including one in Oklahoma that in 1991 led to an oilfield discovery that attracted global attention (see Ames Astrobleme Museum).
More oil-patch history stops for Texas I-20 travelers can be found, beginning with Midland’s Permian Basin Petroleum Museum, celebrating its 50th anniversary in 2025. Traveling eastward brings still more oil history, including the town of Cisco (see Oil Boom brings First Hilton Hotel) and a museum preserving the 1917 “Roaring Ranger” oilfield.
Petroleum history exhibits continue at the Fort Worth Museum of Science and History, and in Dallas, where the Perot Museum of Nature and Science opened in 2012 with oil and gas exhibits.
Finally, another I-20 exit east of Dallas leads to the Van Area Oil and Historical Museum in an old warehouse built in 1930 by the Pure Oil Company. Fifty miles farther, travelers can learn the history of the Great Depression’s “Black Giant” oilfield at the East Texas Oil Museum in Kilgore.
No matter which U.S. interstate traveled, there’s often a petroleum museum nearby.
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Recommended Reading: Chronicles of an Oil Boom: Unlocking the Permian Basin
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The American Oil & Gas Historical Society (AOGHS) preserves U.S. petroleum history. Please become an AOGHS annual supporter and help maintain this energy education website and expand historical research. For more information, contact bawells@aoghs.org. © 2025 Bruce A. Wells. All rights reserved.
Citation Information: Article Title: “Million Barrel Museum.” Authors: B.A. Wells and K.L. Wells. Website Name: American Oil & Gas Historical Society. URL: https://aoghs.org/energy-education-resources/monahans-oil-museum. Last Updated: September 28, 2025. Original Published Date: May 31, 2013.