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Co Rd NW 621 over N Fk Blackwater Rv

Johnson County, Missouri · rated Good in the 2025 National Bridge Inventory

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

Co Rd NW 621 over N Fk Blackwater Rv in Johnson County, Missouri, is rated in good condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the deck, rated 7 (good condition) on the 0-9 scale.
It was built in 1900 and reconstructed in 1987, making it 125 years old at the 2025 inventory.
It carries about 93 vehicles a day (traffic count year 2023).
Its listed owner is the county highway agency.
It is one of 166 of the 475 inventoried bridges in Johnson County rated good (34.9%); 33 (6.9%) are rated poor.
A good rating means every major component - deck, superstructure, substructure, or culvert - is rated 7 or higher on FHWA's 0-9 scale: no more than minor problems.

Component ratings


Structure	Continuous prestressed concrete stringer or multi-beam girder
Length	about 194 ft
Location	S 2 T 46 N R 27 W
NBI structure number	15264
Condition class	Good

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

Bridge	Built	Vehicles/day	Condition
US 50 E over Mayes Br	1968	18,503	Fair
US 50 E over Trib Blackwater Rv	1924	17,553	Fair
Bu 13 S over US 50	1959	17,494	Fair
US 50 W over Post Oak CR	1967	14,542	Fair
Bu 13 S over UP RR	1963	14,241	Fair
US 50 W over Devils Br	1967	10,624	Fair