US Bridges

Darr Road over S Br Lincoln River

Good

Mason County, Michigan · 4 MI N 1 MI E Scottville · Structure no. 000000000006681

Built
2018
7 years old
Condition
Good
inspected April 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
36 ft
1 main span
Daily traffic
167
2018 count
Owner
County
County Highway Agency

About this bridge

Darr Road over S Br Lincoln River is a prestressed concrete box beam or girders - multiple carrying Darr Road over S Br Lincoln River in Mason County, Michigan. It was built in 2018, so it is 7 years old, younger than the Michigan average of 48.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 167 vehicles a day, roughly 5% of them trucks, projected to reach 297 by 2038. The structure is 36 ft (11 m) long and 29 ft wide. If it were closed, the detour would be 5 mi (8 km).

CarriesDarr Road
CrossesS Br Lincoln River
Location4 MI N 1 MI E Scottville
RouteCounty Highway 0
Coordinates44.01316, -86.26071
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
Deck8 Very GoodNo problems noted.
Superstructure9 ExcellentNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation8: Equal to present desirable criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating79.3 US tons
Inventory rating61.1 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadGreater than HL 93
Structure length36 ft (11 m)
Longest span36 ft (11 m)
Deck width29 ft (8.9 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic167 (2018)
Projected traffic297 by 2038
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$128,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Darr Road over S Br Lincoln River built?

It was built in 2018, making it 7 years old in 2025.

What condition is Darr Road over S Br Lincoln 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 April 2023.

How much traffic does Darr Road over S Br Lincoln River carry?

About 167 vehicles per day (2018 count), of which roughly 5% are trucks.

How long is Darr Road over S Br Lincoln River?

The structure is 36 ft (11 m) long with a longest span of 36 ft (11 m) and a deck 29 ft wide.

Who owns Darr Road over S Br Lincoln River?

It is owned by the County Highway Agency.