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I 80 & US 6 over Little Mosquito Creek

Pottawattamie County, Iowa · rated Fair in the 2025 National Bridge Inventory

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

I 80 & US 6 over Little Mosquito Creek in Pottawattamie County, Iowa, is rated in fair condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the culvert, rated 6 (satisfactory condition) on the 0-9 scale.
It was built in 1966, making it 59 years old at the 2025 inventory.
It carries about 31,100 vehicles a day (traffic count year 2022).
Its listed owner is the state highway agency.
It is one of 288 of the 557 inventoried bridges in Pottawattamie County rated fair (51.7%); 50 (9.0%) are rated poor.
A fair rating means the lowest-rated major component scores 5 or 6 on FHWA's 0-9 scale: some deterioration or minor section loss, but the structure is sound. It is the middle class, not a warning.

Component ratings

Component	Rating (2025)	FHWA scale meaning
Culvert	6	Satisfactory condition


Structure	Continuous concrete culvert
Length	about 40 ft
Location	1.6 mi. W of Jct. U.S. 6
NBI structure number	000000000045250
Condition class	Fair

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

Bridge	Built	Vehicles/day	Condition
I-480 & US 6 over Missouri River & RR	1966	53,700	Fair
I-80 EB over Missouri River Rd & RR	1972	31,550	Fair
I 80 WB over Missouri Rvr Rd RR	2010	25,250	Good
I 29 SB over I-80 & I-29 Interchange	2014	23,900	Good
I-80 over Bedell Creek	1965	23,800	Fair
I-80 over Stream	1965	23,600	Fair