Pishkun Road over Sun River
PoorPosted for loadLewis and Clark County, Montana · 19 Miles NW of Augusta · Structure no. MTA-SR-001
- Built
- 1916
- 109 years old
- Condition
- Poor
- inspected September 2023
- Type
- Truss - Thru
- Steel
- Length
- 250 ft
- 2 main spans
- Daily traffic
- 40
- 2023 count
- Owner
- Federal
- Bureau of Reclamation
About this bridge
Pishkun Road over Sun River is a steel truss - thru carrying Pishkun Road over Sun River in Lewis and Clark County, Montana. It was built in 1916, so it is 109 years old, older than the Montana average of 47 years.
The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 3 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.
It carries about 40 vehicles a day, projected to reach 33 by 2041. The structure is 250 ft (76.1 m) long and 13 ft wide. If it were closed, the detour would be 49.7 mi (80 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Superstructure | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Substructure | 3 Serious | Loss of section, deterioration, spalling or scour have seriously affected primary structural components. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Pishkun Road over Sun River built?
It was built in 1916, making it 109 years old in 2025.
What condition is Pishkun Road over Sun River in?
The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in September 2023.
How much traffic does Pishkun Road over Sun River carry?
About 40 vehicles per day (2023 count).
How long is Pishkun Road over Sun River?
The structure is 250 ft (76.1 m) long with a longest span of 110 ft (33.5 m) and a deck 13 ft wide.
Who owns Pishkun Road over Sun River?
It is owned by the Bureau of Reclamation and maintained by the Other Local Agency.