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Ia 136 over Deep Creek

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

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

Ia 136 over Deep Creek in Clinton County, Iowa, is rated in fair condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the deck, rated 5 (fair condition) on the 0-9 scale.
It was built in 1976, making it 49 years old at the 2025 inventory.
It carries about 840 vehicles a day (traffic count year 2022).
Its listed owner is the state highway agency.
It is one of 102 of the 375 inventoried bridges in Clinton County rated fair (27.2%); 12 (3.2%) 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

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