US Bridges

Redstone Road over Pine River

Fair

Midland County, Michigan · 0.2 MI E of Pine River RD · Structure no. 000000000006927

Built
1979
46 years old
Condition
Fair
inspected August 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
134 ft
2 main spans
Daily traffic
1,074
2022 count
Owner
County
County Highway Agency

About this bridge

Redstone Road over Pine River is a prestressed concrete stringer/multi-beam or girder carrying Redstone Road over Pine River in Midland County, Michigan. It was built in 1979, so it is 46 years old, younger 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 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 1,074 vehicles a day, roughly 7% of them trucks, projected to reach 1,596 by 2042. The structure is 134 ft (40.8 m) long and 34 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesRedstone Road
CrossesPine River
Location0.2 MI E of Pine River RD
RouteCounty Highway 0
CountyMidland County
StateMichigan
Coordinates43.48061, -84.53373
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
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
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 inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
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 alignment8: Equal to present desirable criteria
Operating rating83.8 US tons
Inventory rating50.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20 + Mod
Structure length134 ft (40.8 m)
Longest span67 ft (20.4 m)
Deck width34 ft (10.4 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,074 (2022)
Projected traffic1,596 by 2042
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Redstone Road over Pine River built?

It was built in 1979, making it 46 years old in 2025.

What condition is Redstone Road over Pine 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 August 2023.

How much traffic does Redstone Road over Pine River carry?

About 1,074 vehicles per day (2022 count), of which roughly 7% are trucks.

How long is Redstone Road over Pine River?

The structure is 134 ft (40.8 m) long with a longest span of 67 ft (20.4 m) and a deck 34 ft wide.

Who owns Redstone Road over Pine River?

It is owned by the County Highway Agency.