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Poplar Grove Ave over US 20

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

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

Poplar Grove Ave over US 20 in Hamilton County, Iowa, is rated in good condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the substructure, rated 7 (good condition) on the 0-9 scale.
It was built in 1975, making it 50 years old at the 2025 inventory.
It carries about 26 vehicles a day (traffic count year 2022).
Its listed owner is the state highway agency.
It is one of 61 of the 165 inventoried bridges in Hamilton County rated good (37.0%); 32 (19.4%) 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 268 ft
Location	2.0 Miles W of Jct US 69
NBI structure number	000000000603370
Condition class	Good

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

Bridge	Built	Vehicles/day	Condition
I 35 over Drainage Ditch	1966	27,200	Fair
I 35 over Stream	1965	26,900	Good
I-35 over Tuttle Creek	1967	17,400	Fair
I-35 over Drainage Ditch 23 & 31	1972	16,600	Good
I 35 NB over Ia 175	1966	11,850	Fair
I 35 SB over Ia 175	1966	11,850	Fair