Oklahoma's National Register of Historic Places

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ID Number 3000883
Historic Name PENSACOLA DAM
Description of Significance THE PENSACOLA DAM NEAR LANGLEY WAS THE FIRST HYDROELECTRIC FACILITY IN OKLAHOMA AND IS ALSO THE ONLY EXAMPLE OF A MULTIPLE-ARCH DAM IN THE STATE. IT IS ACCLAIMED TO BE THE LONGEST MULTI-ARCHED DAM IN THE WORLD. THREE BUILDINGS - A POWERHOUSE, A SUBSTATION, AND AN OBSERVATION HOUSE - AND FOUR STRUCTURES - THE MULTI-ARCHED DAM, TWO SPILLWAYS, AND A PUMPING/INTAKE STRUCTURE - COMPOSE THE DISTRICT. LOCATED ON GRAND RIVER, THE DAM CONSISTS OF FIFTY-ONE ARCH BARRELS SPANNING 4,284 FEET. THE DAM IS REINFORCED CONCRETE. JOHN DUNCAN FORSYTHE DESIGNED THE MODERN STYLED POWERHOUSE, A FIVE-STORY CONCRETE-WALLED BUILDING. THE POWERHOUSE IS 279 FEET LONG, 72 FEET WIDE, AND 80 FEET HIGH. THE LISTED IN NATIONAL REGISTER 9/2/2003.
Current Name GRAND RIVER DAM
Address STATE HIGHWAY 28 OVER GRAND RIVER, 1/2 MILE EAST OF INTERSECTION WITH STATE HIGHWAY 82
City LANGLEY VICINITY
County MAYES
Lot
Block
Current Section
Township
Range
Type DISTRICT
Historic Function INDUSTRY/PROCESSING/EXTRACTION: ENERGY FACILITY
Current Function INDUSTRY/PROCESSING/EXTRACTION: ENERGY FACILITY
Area Signficance 1 ENGINEERING
Area Significance 2
Date Prepared JUNE 2003
Year Built 1938
Original Site YES
Architect/Builder FORSYTHE, JOHN DUNCAN - ARCHITECT; HOLWAY, W.R. - CONTRACTOR
Architectural Style OTHER: MULTIPLE ARCH DAMMODERN MOVEMENT: MODERNE
Roof Material ASPHALT
Wall Material CONCRETE
Window Material UNCOLLECTED
Door Material UNCOLLECTED
Decorative Details
Condition GOOD
Comments
Restricted N