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County Road over Mosquito Creek

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

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

County Road over Mosquito Creek in Dallas 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 2008, making it 17 years old at the 2025 inventory.
It carries about 62 vehicles a day (traffic count year 2022).
Its listed owner is the county highway agency.
It is one of 96 of the 206 inventoried bridges in Dallas County rated good (46.6%); 18 (8.7%) 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 153 ft
Location	079292701
NBI structure number	000000000131871
Condition class	Good

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

Bridge	Built	Vehicles/day	Condition
I-80 over Panther Creek	1965	32,100	Good
I-80 over Bear Creek	1965	29,500	Good
EB I-80 over over UP RR	1966	27,550	Fair
WB I-80 over over UP RR	1966	26,850	Fair
EB I-80 over Sugar Creek	1966	24,500	Fair
WB I-80 over Sugar Creek	1966	24,050	Fair