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US 30 EB over Otter Creek

Tama County, Iowa · rated Good in the 2025 National Bridge Inventory

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

US 30 EB over Otter Creek in Tama County, Iowa, is rated in good condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the deck, rated 8 (very good condition) on the 0-9 scale.
It was built in 2019, making it 6 years old at the 2025 inventory.
It carries about 3,250 vehicles a day (traffic count year 2022).
Its listed owner is the state highway agency.
It is one of 124 of the 337 inventoried bridges in Tama County rated good (36.8%); 107 (31.8%) 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	Prestressed concrete stringer or multi-beam girder
Length	about 307 ft
Location	6.0 Mi. E OF US 63
NBI structure number	000000000049532
Condition class	Good

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

Bridge	Built	Vehicles/day	Condition
US 30 over Stream	1996	11,500	Good
US 30 WB over Slip Bridge Ramp	2010	7,600	Good
US 30 WB over Salt Creek	2019	6,600	Good
US 30 over Trib to Iowa River	2008	6,500	Good
US 30 WB over Iowa River	2002	5,950	Good
US 30 WB over Iowa River East Overflow	2021	5,950	Good