US Bridges

Service Road over Thief Bay

Good

Marshall County, Minnesota · Sec 36 T157N R42W · Structure no. 000032510-00030

Built
1979
46 years old
Condition
Good
inspected August 2023
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
65 ft
3 main spans
Daily traffic
—
2023 count
Owner
Federal
Bureau of Fish and Wildlife

About this bridge

Service Road over Thief Bay is a wood or timber stringer/multi-beam or girder carrying Service Road over Thief Bay in Marshall County, Minnesota. It was built in 1979, so it is 46 years old, older than the Minnesota average of 38.5 years.

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

No traffic count is recorded. The structure is 65 ft (19.8 m) long and 12 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

Open in Google Maps
CarriesService Road
CrossesThief Bay
LocationSec 36 T157N R42W
RouteFederal Lands Road 0
CountyMarshall County
StateMinnesota
Coordinates48.3745, -96.001
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation6: Equal to present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating32 US tons
Inventory rating23 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckWood or timber
Main spans3
Design loadUnknown
Structure length65 ft (19.8 m)
Longest span21 ft (6.4 m)
Deck width12 ft (3.7 m)
Roadway width11 ft (3.4 m)
Vertical clearance over deck107 ft (32.7 m)

Traffic and service

Average daily traffic—
Projected traffic1 by 2043
Trucks0%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerBureau of Fish and Wildlife
Maintained byBureau of Fish and Wildlife
Historic statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Service Road over Thief Bay built?

It was built in 1979, making it 46 years old in 2025.

What condition is Service Road over Thief Bay 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 August 2023.

How much traffic does Service Road over Thief Bay carry?

No traffic count is recorded for this structure.

How long is Service Road over Thief Bay?

The structure is 65 ft (19.8 m) long with a longest span of 21 ft (6.4 m) and a deck 12 ft wide.

Who owns Service Road over Thief Bay?

It is owned by the Bureau of Fish and Wildlife.