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Adams CR Rd over Mid Fk Black Rvr

Iron County, Missouri · rated Fair in the 2025 National Bridge Inventory

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

Adams CR Rd over Mid Fk Black Rvr in Iron County, Missouri, is rated in fair condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the substructure, rated 5 (fair condition) on the 0-9 scale.
It was built in 1991, making it 34 years old at the 2025 inventory.
It carries about 35 vehicles a day (traffic count year 2023).
Its listed owner is the county highway agency.
It is one of 76 of the 126 inventoried bridges in Iron County rated fair (60.3%); 13 (10.3%) are rated poor.
A fair rating means the lowest-rated major component scores 5 or 6 on FHWA's 0-9 scale: some deterioration or minor section loss, but the structure is sound. It is the middle class, not a warning.

Component ratings


Structure	Steel stringer or multi-beam girder
Length	about 63 ft
Location	S 12 T 34 N R 1 W
NBI structure number	14678
Condition class	Fair

Source: FHWA National Bridge Inventory, 2025 data as reported by the Missouri department of transportation.

Bridge	Built	Vehicles/day	Condition
Mo 21 S over Knob CR	1967	6,248	Fair
Old Rte 21 over Stouts CR	1926	4,000	Fair
Mo 21 S over Stouts CR	1967	3,870	Fair
Rt N N over UP RR	2007	3,718	Good
Rt N N over Indian CR	1932	3,718	Fair
Mo 21 S over Claybaugh CR	1985	3,513	Good