Home › Montana › Richland County › County Road 430 over Dunlap Creek 059

County Road 430 over Dunlap Creek 059

Richland County, Montana · rated Fair in the 2025 National Bridge Inventory

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

County Road 430 over Dunlap Creek 059 in Richland County, Montana, is rated in fair condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the superstructure, rated 6 (satisfactory condition) on the 0-9 scale.
It was built in 1951, making it 74 years old at the 2025 inventory.
It carries about 100 vehicles a day (traffic count year 2025).
Its listed owner is the county highway agency.
It is one of 66 of the 97 inventoried bridges in Richland County rated fair (68.0%); 4 (4.1%) 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


Structure	Steel stringer or multi-beam girder
Length	about 30 ft
Location	3M NW Savage
NBI structure number	L42430001+04001
Condition class	Fair

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

Bridge	Built	Vehicles/day	Condition
S 16-holly St over Usrs Canal	1999	5,874	Fair
S 200 over First Hay Creek	1986	4,499	Fair
S 200 over Second Hay Creek	1986	4,499	Good
S 16-s Central Ave over Lone Tree Creek	1974	3,968	Fair
14TH St SE over Lone Tree Creek	1973	3,099	Fair
S 16 over Usbr Main Canal	1984	2,821	Fair