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Pensacola Dam

Mayes County, Oklahoma

Map 

Facts 

Overview
Dam carrying S.H. 28 over Neosho (Grand) River between Langley & Disney.
Location
Mayes County, Oklahoma
Status
Open to traffic
History
Built 1940 by the Grand River Dam Authority.
Builders
- John Duncan Forsythe
- W. R. Holway
Design
Concrete multiple-arch (51) dam across the Neosho (Grand) River carrying S.H. 28. World's longet multiple-ach dam.
Dimensions
Length of largest span: 61.4 ft.
Total length: 4,284.3 ft. (0.8 mi.)
Deck width: 19.7 ft.
Recognition
Posted to the National Register of Historic Places on September 2, 2003
Also called
Grand River Dam
Approximate latitude, longitude
+36.47333, -95.04167   (decimal degrees)
36°28'24" N, 95°02'30" W   (degrees°minutes'seconds")
Approximate UTM coordinates
15/317083/4038387 (zone/easting/northing)
Quadrangle map:
Spavinaw
Elevation
780 ft. above sea level
Average daily traffic (as of 2015)
3,000
Inventory numbers
NRHP 03000883 (National Register of Historic Places reference number)
OKNBI 275690000000000 (Oklahoma bridge number on the National Bridge Inventory)
BH 37900 (Bridgehunter.com ID)
Inspection report (as of October 2016)
Overall condition: Fair
Superstructure condition rating: Fair (5 out of 9)
Substructure condition rating: Fair (5 out of 9)
Deck condition rating: Fair (5 out of 9)
Sufficiency rating: 28.4 (out of 100)
View more at BridgeReports.com

Categories 

Built 1940 (997)
Built during 1940s (3,805)
Dam (43)
Functionally obsolete (7,568)
John Duncan Forsythe (1)
Mayes County, Oklahoma (29)
NR-listed (2,860)
 OK 28 (2)
Oklahoma (1,960)
Open (38,111)
Span length 50-75 feet (9,410)
Total length over 2500 feet (801)
W. R. Holway (1)

Update Log 

  • October 28, 2008: Added by Rick Mattioni

Sources 

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