US Bridges

Fed Forest HWY 13 over Sturgeon River

Fair

Delta County, Michigan · 7 MI N of Nahma JCT · Structure no. 000000000002140

Built
1941
84 years old, rebuilt 2015
Condition
Fair
inspected July 2023
Type
Tee Beam
Concrete
Length
105 ft
3 main spans
Daily traffic
467
2021 count
Owner
County
County Highway Agency

About this bridge

Fed Forest HWY 13 over Sturgeon River is a concrete tee beam carrying Fed Forest HWY 13 over Sturgeon River in Delta County, Michigan. It was built in 1941 and reconstructed in 2015, so it is 84 years old, older than the Michigan average of 48.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 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 467 vehicles a day, roughly 1% of them trucks, projected to reach 480 by 2041. The structure is 105 ft (32 m) long and 34 ft wide. If it were closed, the detour would be 24.2 mi (39 km).

Location

Open in Google Maps
CarriesFed Forest HWY 13
CrossesSturgeon River
Location7 MI N of Nahma JCT
RouteCounty Highway 2167
CountyDelta County
StateMichigan
Coordinates45.98918, -86.6799
Functional classRural Major Collector

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating63.9 US tons
Inventory rating38.3 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length105 ft (32 m)
Longest span35 ft (10.7 m)
Deck width34 ft (10.4 m)
Roadway width29 ft (8.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic467 (2021)
Projected traffic480 by 2041
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed24.2 mi (39 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$65,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Fed Forest HWY 13 over Sturgeon River built?

It was built in 1941, making it 84 years old in 2025. It was reconstructed in 2015.

What condition is Fed Forest HWY 13 over Sturgeon 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 July 2023.

How much traffic does Fed Forest HWY 13 over Sturgeon River carry?

About 467 vehicles per day (2021 count), of which roughly 1% are trucks.

How long is Fed Forest HWY 13 over Sturgeon River?

The structure is 105 ft (32 m) long with a longest span of 35 ft (10.7 m) and a deck 34 ft wide.

Who owns Fed Forest HWY 13 over Sturgeon River?

It is owned by the County Highway Agency.