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Bridge conditions in Logan County, Oklahoma

280 inventoried bridges · 55 rated poor · 2025 National Bridge Inventory

United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled August 20, 2026

Logan County has 55 bridges rated poor out of 280 inventoried, a 19.6% share that puts it well above the national rate of about 7%.

55 of the 280 bridges in Logan County, Oklahoma, are rated in poor condition (19.6%) in the 2025 National Bridge Inventory, as of August 20, 2026.
56 bridges (20.0%) are rated good and 169 (60.4%) fair.
The median Logan County bridge was built in 1982.
The busiest poor-rated bridge is S.H. 74 over Cottonwood Creek (built 1947), carrying about 5,400 vehicles a day.

Good 20.0% · Fair 60.4% · Poor 19.6% of 280 bridges

Bridges rated poor

Every bridge in the county with a poor rating, busiest first. Poor means a major component is rated 4 or lower on FHWA's 0-9 scale; it is a repair flag, not a closure notice.

Bridge	Built	Vehicles/day	Condition
S.H. 74 over Cottonwood Creek	1947	5,400	Poor
E0740 (old S.H. 33 over Fitzgerald Creek	1927	500	Poor
Triple X Rd. over Fitzgerald Creek	1954	450	Poor
E0590 over Horse Creek	1925	300	Poor
N3150 over Creek	1950	150	Poor
E0610 over West Beaver Creek	1916	100	Poor
E0660 over Bridge Creek	1920	100	Poor
E0600 over Otter Creek	1960	100	Poor
N3160 over Creek	1930	100	Poor
E0630 over Horse Creek	1938	100	Poor
N3270 over Bear Creek	1908	100	Poor
E0610 over East Beaver Creek	1936	100	Poor
E0750 over Creek	1937	100	Poor
E0690 over Creek	1949	100	Poor
E0750 over Creek	1940	100	Poor
N3000 over Creek	1940	100	Poor
E0600 over Horse Creek	1940	100	Poor
E0630 over Spring Creek	1940	100	Poor
E0600 over Otter Creek	1986	100	Poor
E0630 over Creek	1940	100	Poor
E0760 over Creek	1946	100	Poor
N3200 over Fitzgerald Creek	1948	100	Poor
E0680 over Shawnee Creek	1950	100	Poor
E0640 over Creek	1950	100	Poor
E0670 over Shawnee Creek	1950	100	Poor
E0650 over Bridge Creek	1950	100	Poor
N3020 over Cottonwood Creek	1950	100	Poor
E0720 over Creek	1952	100	Poor
E0590 over Creek	1952	100	Poor
N3140 over Creek	1957	100	Poor
N3040 over Creek	1957	100	Poor
N3060 over Elkhorn Creek	1960	100	Poor
E0640 over Bridge Creek	1960	100	Poor
N3120 over Skeleton Creek	1960	100	Poor
N3210 over Coon Creek	1970	100	Poor
E0820 over Pawnee Creek	1990	100	Poor
N3170 over Creek	1940	100	Poor
E0640 over Middle Beaver Creek	1947	100	Poor
E0810 over Creek	1950	50	Poor
N3150 over E. Branch Beaver Creek	1920	30	Poor
E0590 over Creek	1954	25	Poor
E0740 over Soldier Creek	1910	25	Poor
N3030 over Creek	2003	25	Poor
N3030 over Creek	2003	25	Poor
E0650 over Creek	1914	24	Poor
E0730 over Antelope Creek	1920	24	Poor
N3210 over Fitzgerald Creek	1921	24	Poor
N3110 over Creek	1929	24	Poor
N3030 over Spring Creek	1936	24	Poor
E0770 over Gar Creek	1934	24	Poor
E0840 over Bear Creek	1940	24	Poor
E0810 over Grant Creek	1950	24	Poor
E0800 over Creek	1950	24	Poor
N3020 over Boggy Creek	1988	24	Poor
E0640 over West Beaver Creek	2000	24	Poor

Busiest bridges in the county

Bridge	Built	Vehicles/day	Condition
I-35 over Creek	1959	33,500	Fair
I-35 over Bird Creek	1959	25,900	Fair
I-35 over Pin Creek	1959	18,300	Fair
I-35 NB over Creek	1959	17,200	Fair
I-35 S.B. over Creek	1959	17,150	Fair
SB I-35 over Triplett Rd. Under	1998	16,900	Fair
U.S. 77 over Creek	1925	14,400	Fair
U.S. 77 Ramp W-n over I-35 Under	2001	13,600	Fair
U.S. 77 over Snake Creek	1939	13,000	Fair
I-35 over S.H. 33 Under	1959	12,950	Fair

Source: FHWA National Bridge Inventory, 2025. Counts cover inventoried highway bridges over 20 feet; ratings are reported by the state DOT.

Every bridge in Logan County → - all 280, busiest first, each with its own condition record.

All of Oklahoma: Oklahoma bridge conditions by county · every download on the data page.

Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.