Qualla: Pensacola Dam

Pensacola Dam: Introduction

Fri, 06 Feb 2026 00:00:00 GMT

Photo credit USGS, Public domain. Fifty-one concrete arches march across the Grand River in Mayes County, Oklahoma, forming the longest multiple-arch dam in the world. The Pensacola Dam is a monument to Depression-era determination -- conceived by a teenager who left Oklahoma at 16 to study dam construction in India and Africa, funded by Franklin Roosevelt's New Deal, and built by 3,000 workers who earned about $16 a week. When it was completed in 1940, it created Grand Lake o' the Cherokees and became Oklahoma's first hydroelectric power plant, transforming a flood-prone river valley into an engine of electricity and recreation.

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Image: USGS | Public domain

Pensacola Dam: A Dream Built on Borrowed Money

Fri, 06 Feb 2026 00:00:00 GMT

Photo credit USGS, Public domain. The story of Pensacola Dam begins with Henry Holderman, who left Oklahoma as a teenager to work on dam projects in India and Africa. When he returned, he sold his land holdings and borrowed money from friends to purchase rights to the dam sites he had prospected along the Grand R...

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Image: USGS | Public domain

Pensacola Dam: Fifty-One Arches

Fri, 06 Feb 2026 00:00:00 GMT

Photo credit USGS, Public domain. Pensacola Dam is a multiple-arch buttress design consisting of 51 arches, a main spillway, and two auxiliary spillways. The Massman Construction Company of Kansas City, Missouri, built the major superstructures. Thousands of workers relocated to the area before construction began...

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Image: USGS | Public domain

Pensacola Dam: Power Versus Nature

Fri, 06 Feb 2026 00:00:00 GMT

Photo credit USGS, Public domain. Managing Pensacola Dam means balancing competing demands: flood control, hydroelectric generation, recreation, and environmental conservation. When the reservoir's elevation exceeds certain levels, the U.S. Army Corps of Engineers takes over discharge control. In hot mid-summer p...

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Image: USGS | Public domain

Pensacola Dam: A New Deal Legacy on the Grand

Fri, 06 Feb 2026 00:00:00 GMT

Photo credit USGS, Public domain. Between Memorial Day and Labor Day, the Grand River Dam Authority offers free tours of the dam, and visitation has been steadily growing -- more than 9,000 people came in 2010 alone. The Ecosystems and Education Center, completed that same year, serves as both a water and fish mo...

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Image: USGS | Public domain