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SB I-29 over Pony Creek

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

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

SB I-29 over Pony Creek in Mills 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 7 (good condition) on the 0-9 scale.
It was built in 2010, making it 15 years old at the 2025 inventory.
It carries about 6,800 vehicles a day (traffic count year 2022).
Its listed owner is the state highway agency.
It is one of 54 of the 184 inventoried bridges in Mills County rated good (29.3%); 35 (19.0%) 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 154 ft
Location	0.7 Mile N of S Jct US 34
NBI structure number	000000000036281
Condition class	Good

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

Bridge	Built	Vehicles/day	Condition
I-29 over Fulsom Lake Outlet	2010	19,700	Good
NB I-29 over St Marys Creek	2009	9,850	Good
SB I-29 over St Marys Creek	2009	9,850	Good
Locust Street over Tinkle Branch	1976	8,957	Fair
US 34 over Missouri River	2014	7,100	Good
NB I-29 over Drainage Ditch	2009	6,850	Good