The “official” birthdate occurs sometime later in 2020, but since this year marks the 80th anniversary of Pensacola Dam, we (GRDA) plan to share information all year long about this historic structure and the important role it has played in the development of Oklahoma and the surrounding region.

Much of the dirt work for Pensacola Dam was just getting underway when this photograph (above) was taken in September of 1938.

It would be approximately two more years before the dam was completed in 1940.

Since then, it has produced renewable electricity for 80 years and, of course, become a featured Grand Lake attraction.

Today, the six hydroelectric turbine-generators located inside the Pensacola Dam powerhouse continue to produce electricity in the same way that the dam’s original builders intended, all the way back in 1940.

In the late 1990s/early 2000s, those generators were upgraded with new components so that both generation capacity and efficiency would increase, but still, capturing the power of falling water to create renewable hydroelectricity continues as it always has throughout Pensacola Dam’s lifetime.

However, the importance of Pensacola Dam goes beyond just power production, and also includes other areas like economic development.

Of course news of its construction beginning in 1938 fell like much-needed rain on the ears of those struggling to find work during the Great Depression.

Thousands of men and women flocked to the region surrounding the construction site in those early days to help turn the dream of a mile-long dam across the Grand River Valley into a reality.

Today, everyone who enjoys the waters of Grand Lake and relies on the electricity the dam produces, still benefit from the work done by so many people, so long ago.

Pensacola Dam Electric Powerhouse

Remembering Those Who Made It Possible

It would be difficult in a limited space like this to list all of the individuals who left an indelible mark on Oklahoma by bringing the Pensacola Dam from an idea to a reality in 1940.

However, as the Grand River Dam Authority celebrates the dam’s 80th birthday all year long, we will continue to use this space to tell the stories of the people and the issues and interesting facts surrounding Oklahoma’s first hydroelectric facility.

During the free tours of Pensacola Dam offered by GRDA, visitors can learn more about Henry Holderman, the man credited with being the first to envision a dam across the Grand River Valley.

A Cherokee, Holderman wanted to provide hydroelectric power to Indian Territory and he worked many years to try to make that dream a reality.

In later years others, including a group of Grove and Vinita businessmen known as the Rainbow Chasers, would also pick up the cause and help secure funding for the project.

Along the way there were plenty of others as well, with names like Thomas and Rorschach, Schaefer and Babb, Butler, Disney, Langley and more.

Some were the “Rainbow Chasers” and others were civic and political leaders who also supported the cause in Oklahoma City and Washington, D.C. and all across the region.

There were also engineers, construction workers, early-day GRDA officials and citizens living near the construction site who helped bring hydroelectricity, recreational opportunity and, most of all, economic development to the region by playing some role in the completion of Pensacola Dam.

Pensacola Dam construction 1938

A “Grand” Lake For a New Dam


If things had gone like Mr. Wm. P. Appleby of Claremore suggested in the late 1930s, there would be no Grand Lake.

Don’t get the wrong idea; Mr. Appleby wasn’t against Grand Lake; he was just in favor of another name.

Appleby was just one of many interested parties who submitted name ideas for the new lake, back in the days when GRDA was still building Pensacola Dam.

Appleby’s letter to GRDA, dated February 16, 1938, reveals “Chouteau Lake” was his choice for the new body of water that would forever change the landscape of Northeast Oklahoma.

He wasn’t alone.

In fact, a group called the Pioneers of Oklahoma took a vote and out of 12,000 ballots, 98 percent agreed with Appleby.

Why? Likely because Chouteau was a pioneer in Oklahoma and in 1796 he established a trading post on the shores of the Grand River, near present-day Salina.

But there were other suggestions too.

Among them were Oklahoma Roosevelt Lake, Will Rogers Lake, Tulsahoma Lake, Wiley Post Lake and even Electric Power Lake.

In the end though, this 46,500 surface acres of water, impounded by the brand-new Pensacola Dam would become the Grand Lake O’ the Cherokees.

The rest, as they say, is 80 years of history.

Grand Lake 1940

The Right Mix To Build The Pensacola Dam

The construction of Pensacola Dam in the late 1930s called for a lot of earth excavation, a lot of steel and a lot of concrete in cement.

In fact, it took 625,000 barrels of cement and 510,000 cubic yards of concrete to bring the dam’s 51 iconic arches and its powerhouse out of the ground and into completed reality.

Still, W.R. Holway, the chief engineer on the construction project, knew that getting the right materials to the construction site – especially the right type of cement mixture – may prove challenging.

However, thanks to important pre-planning and cooperation on the part of many suppliers, the materials and manpower all came together at the right place and time.

Here’s how Holway recalled that effort in his book, A History of the Grand River Dam Authority (1968):

“… It was necessary to obtain cement of a special type in order to maintain a fast schedule of pouring the arches and buttresses. We arranged as several-day conference in Tulsa with the managers and chief chemists of all the cement plants in the area (Oklahoma, Texas, Missouri and Kansas). No one  plant in this area was equipped to produce the quantity of this special type of cement (Type 2), but at this conference it was arranged that several plants would join to furnish the necessary quantity in the time required.”

That little bit of teamwork is another reason we can celebrate Pensacola Dam’s 80th birthday in 2020.

About the photo: A powerful mix – Nearly 81 years ago, these construction workers were hard at work pouring the concrete to help construct Pensacola Dam. The right mixture of materials like concrete, cement and structural steel – along with the efforts of workers like these – was vitally important in bringing the dam from vision to reality.

Pouring of concrete at Pensacola Dam 1939

Be looking for more stories here that celebrate the 80th anniversary of Pensacola Dam, its past, present, and its future.

Some of those stories you may know well, but others will be new. We hope they all are of interest to you.

And, don’t forget about the FREE Pensacola Dam tours that are available daily from Memorial Day through Labor Day and are available throughout the year by appointment.

GRDA is Oklahoma’s state-owned electric utility, funded by revenues from electric and water sales. GRDA strives to be an “Oklahoma agency of excellence” by focusing on the 5E’s: electricity, economic development, environmental stewardship, employees and efficiency.

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