US Bridges

Swamp Creek Road over Swamp Creek

Good

Lincoln County, Montana · Swamp Creek · Structure no. 011403000001087

Built
1995
30 years old
Condition
Good
inspected July 2023
Type
Culvert
Steel
Length
23 ft
1 main span
Daily traffic
50
Owner
Federal
U.S. Forest Service

About this bridge

Swamp Creek Road over Swamp Creek is a steel culvert carrying Swamp Creek Road over Swamp Creek in Lincoln County, Montana. It was built in 1995, so it is 30 years old, younger than the Montana average of 47 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 50 vehicles a day, projected to reach 75 by 2045. The structure is 23 ft (7 m) long. If it were closed, the detour would be 14.9 mi (24 km).

CarriesSwamp Creek Road
CrossesSwamp Creek
LocationSwamp Creek
RouteFederal Lands Road 3553
StateMontana
Coordinates48.59696, -115.06195
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert8 Very GoodNo problems noted.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation8: Equal to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating100 US tons
Inventory rating77.2 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans1
Design loadUnknown
Structure length23 ft (7 m)
Longest span23 ft (6.9 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (—)
Projected traffic75 by 2045
Trucks—
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.9 mi (24 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerU.S. Forest Service
Maintained byU.S. Forest Service
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Swamp Creek Road over Swamp Creek built?

It was built in 1995, making it 30 years old in 2025.

What condition is Swamp Creek Road over Swamp Creek in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in July 2023.

How much traffic does Swamp Creek Road over Swamp Creek carry?

About 50 vehicles per day (latest count).

How long is Swamp Creek Road over Swamp Creek?

The structure is 23 ft (7 m) long with a longest span of 23 ft (6.9 m).

Who owns Swamp Creek Road over Swamp Creek?

It is owned by the U.S. Forest Service.