US Bridges

T 84 over Marsh River

Good

Norman County, Minnesota · 0.5 MI S of JCT Csah 19 · Structure no. 54525

Built
1978
47 years old
Condition
Good
inspected November 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
226 ft
3 main spans
Daily traffic
12
1986 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

T 84 over Marsh River is a steel continuous stringer/multi-beam or girder carrying T 84 over Marsh River in Norman County, Minnesota. It was built in 1978, so it is 47 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.

It carries about 12 vehicles a day, projected to reach 12 by 2029. The structure is 226 ft (68.9 m) long and 33 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesT 84
CrossesMarsh River
Location0.5 MI S of JCT Csah 19
RouteCounty Highway 84
Coordinates47.35378, -96.68406
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.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating73.4 US tons
Inventory rating44 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length226 ft (68.9 m)
Longest span85 ft (25.9 m)
Deck width33 ft (10.2 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic12 (1986)
Projected traffic12 by 2029
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerTown or Township Highway Agency
Maintained byTown or Township Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was T 84 over Marsh River built?

It was built in 1978, making it 47 years old in 2025.

What condition is T 84 over Marsh River 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 November 2023.

How much traffic does T 84 over Marsh River carry?

About 12 vehicles per day (1986 count).

How long is T 84 over Marsh River?

The structure is 226 ft (68.9 m) long with a longest span of 85 ft (25.9 m) and a deck 33 ft wide.

Who owns T 84 over Marsh River?

It is owned by the Town or Township Highway Agency.