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200TH Ave over Small

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

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

200TH Ave over Small in Clinton 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 9 (excellent condition) on the 0-9 scale.
It was built in 2023, making it 2 years old at the 2025 inventory.
It carries about 104 vehicles a day (traffic count year 2022).
Its listed owner is the county highway agency.
It is one of 261 of the 375 inventoried bridges in Clinton County rated good (69.6%); 12 (3.2%) are rated poor.
Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
It does not appear under this structure number in the 2024 inventory (a new or renumbered structure).
Its most recent inspection on record is dated January 2024, on a 24-month routine inspection cycle.
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	Steel stringer or multi-beam girder
Length	about 41 ft
Location	On 200th Ave
NBI structure number	000000000121542
Condition class	Good
Traffic status (item 41)	Open, no restriction
Last inspection (item 90)	January 2024
Inspection interval (item 91)	24 months
Scour (item 113)	6: scour evaluation not yet made

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

Bridge	Built	Vehicles/day	Condition
US 61 over Dd #15	1981	17,600	Good
US 30 & 67 over Mill Creek	2000	17,300	Fair
US 30 & US 67 over over UPRR	2000	17,200	Good
US 67 over over UP RR	1978	11,200	Fair
US 30 over Mississippi Rvr RR S 2ND	1956	11,100	Fair
Ia 136 over Mississippi River & RR	1974	11,000	Fair