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Local over Branch S Timber Creek

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

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

Local over Branch S Timber Creek in Marshall 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 1938, making it 87 years old at the 2025 inventory.
It carries about 11 vehicles a day (traffic count year 2022).
Its listed owner is the county highway agency.
It is one of 130 of the 303 inventoried bridges in Marshall County rated poor (42.9%); 130 (42.9%) 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	Steel stringer or multi-beam girder
Length	about 27 ft
Location	083172004
NBI structure number	000000000242450
Condition class	Poor

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

Bridge	Built	Vehicles/day	Condition
US 30 over Davisons Creek	1954	14,700	Fair
Ia 14 over Linn Creek	1985	13,300	Good
Ia 14 over UP RR Madison&market St	1985	13,300	Fair
So. 6TH St. over Linn Creek	1984	11,300	Fair
So Center St over Linn Creek	1951	10,448	Poor
So Center St over RR and Madison St	1951	9,491	Poor