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FM over Rock Creek

Jefferson County, Iowa · rated Poor in the 2025 National Bridge Inventory

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

FM over Rock Creek in Jefferson County, Iowa, is rated in poor condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the deck, rated 4 (poor condition) on the 0-9 scale.
It was built in 1964, making it 61 years old at the 2025 inventory.
It carries about 270 vehicles a day (traffic count year 2022).
Its listed owner is the county highway agency.
It is one of 31 of the 156 inventoried bridges in Jefferson County rated poor (19.9%); 31 (19.9%) are rated poor.
A poor rating means at least one major component - deck, superstructure, or substructure - is rated 4 or lower on FHWA's 0-9 scale. It does not by itself mean the bridge is unsafe; bridges judged unsafe are closed or load-restricted by their owners.

Component ratings


Structure	Prestressed concrete stringer or multi-beam girder
Length	about 49 ft
Location	071110610
NBI structure number	000000000200590
Condition class	Poor

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

Bridge	Built	Vehicles/day	Condition
US 34 EB over BNSF RR	2008	7,800	Good
US 34 WB over BNSF RR	2008	7,800	Good
US 34 over Mitchell Creek	2009	4,360	Good
Ia 1 over Crow Creek	1928	4,100	Fair
US 34 EB over Big Cedar Creek	2016	3,900	Fair
US 34 WB over Big Cedar Creek	2006	3,900	Good