US Bridges

M 34 over Snake River

FairPosted for load

Marshall County, Minnesota · 0.1 MI N of JCT TH 1 · Structure no. L4208

Built
1959
66 years old
Condition
Fair
inspected November 2023
Type
Slab
Wood or Timber
Length
78 ft
3 main spans
Daily traffic
100
1994 count
Owner
City
City or Municipal Highway Agency

About this bridge

M 34 over Snake River is a wood or timber slab carrying M 34 over Snake River in Marshall County, Minnesota. It was built in 1959, so it is 66 years old, older than the Minnesota average of 38.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: posted for load restriction.

It carries about 100 vehicles a day, projected to reach 100 by 2029. The structure is 78 ft (23.8 m) long and 21 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesM 34
CrossesSnake River
Location0.1 MI N of JCT TH 1
RouteCity Street 34
CountyMarshall County
StateMinnesota
Coordinates48.20076, -96.76772
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating28.2 US tons
Inventory rating21.8 US tons

Structure

Structure typeSlab
MaterialWood or Timber
DeckWood or timber
Main spans3
Design loadUnknown
Structure length78 ft (23.8 m)
Longest span26 ft (8 m)
Deck width21 ft (6.4 m)
Roadway width20 ft (6.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (1994)
Projected traffic100 by 2029
Trucks—
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost$279 million
NavigationNo navigation control on waterway

Frequently asked questions

When was M 34 over Snake River built?

It was built in 1959, making it 66 years old in 2025.

What condition is M 34 over Snake River in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in November 2023.

How much traffic does M 34 over Snake River carry?

About 100 vehicles per day (1994 count).

How long is M 34 over Snake River?

The structure is 78 ft (23.8 m) long with a longest span of 26 ft (8 m) and a deck 21 ft wide.

Who owns M 34 over Snake River?

It is owned by the City or Municipal Highway Agency.