Home › Montana › Powder River County › S 59 over Mizpah Creek

S 59 over Mizpah Creek

Powder River County, Montana · rated Good in the 2025 National Bridge Inventory

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

S 59 over Mizpah Creek in Powder River County, Montana, 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 2001, making it 24 years old at the 2025 inventory.
It carries about 742 vehicles a day (traffic count year 2023).
Its listed owner is the state highway agency.
It is one of 12 of the 23 inventoried bridges in Powder River County rated good (52.2%); 0 (0.0%) 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 91 ft
Location	9M NW Broadus
NBI structure number	P00023069+07971
Condition class	Good

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

Bridge	Built	Vehicles/day	Condition
US 212 over Little Powder River	1976	2,594	Fair
US 212 over E Fk Little Powder River	1983	2,594	Fair
US 212 over E Fork Otter Creek	1992	2,305	Good
US 212 over Pumpkin Creek	2012	2,197	Good
US 212 over Powder River	1985	2,084	Good
S 59 over Road Creek-stockpass	2001	742	Good