US Bridges

T 15 over Marsh Creek (jd # 91)

Fair

Mahnomen County, Minnesota · 1.2 MI N of JCT Csah 1 · Structure no. L9837

Built
1978
47 years old
Condition
Fair
inspected September 2024
Type
Culvert
Steel
Length
34 ft
3 main spans
Daily traffic
7
1986 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

T 15 over Marsh Creek (jd # 91) is a steel culvert carrying T 15 over Marsh Creek (jd # 91) in Mahnomen 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 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.

It carries about 7 vehicles a day, projected to reach 7 by 2029. The structure is 34 ft (10.3 m) long. If it were closed, the detour would be 6.8 mi (11 km).

Location

Open in Google Maps
CarriesT 15
CrossesMarsh Creek (jd # 91)
Location1.2 MI N of JCT Csah 1
RouteCounty Highway 15
CountyMahnomen County
StateMinnesota
Coordinates47.45803, -95.93317
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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating46.4 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans3
Design loadUnknown
Structure length34 ft (10.3 m)
Longest span9 ft (2.8 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7 (1986)
Projected traffic7 by 2029
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerTown or Township Highway Agency
Maintained byCounty 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 15 over Marsh Creek (jd # 91) built?

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

What condition is T 15 over Marsh Creek (jd # 91) 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 September 2024.

How much traffic does T 15 over Marsh Creek (jd # 91) carry?

About 7 vehicles per day (1986 count).

How long is T 15 over Marsh Creek (jd # 91)?

The structure is 34 ft (10.3 m) long with a longest span of 9 ft (2.8 m).

Who owns T 15 over Marsh Creek (jd # 91)?

It is owned by the Town or Township Highway Agency and maintained by the County Highway Agency.