US Bridges

Harrison Road over Pine River

Good

Gratiot County, Michigan · Sec 8-17 Arcada Twp · Structure no. 000000000003180

Built
1977
48 years old
Condition
Good
inspected June 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
129 ft
2 main spans
Daily traffic
1,020
2003 count
Owner
County
County Highway Agency

About this bridge

Harrison Road over Pine River is a prestressed concrete box beam or girders - multiple carrying Harrison Road over Pine River in Gratiot County, Michigan. It was built in 1977, so it is 48 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 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 1,020 vehicles a day, projected to reach 1,380 by 2023. The structure is 129 ft (39.3 m) long and 33 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesHarrison Road
CrossesPine River
LocationSec 8-17 Arcada Twp
RouteCounty Highway 2966
CountyGratiot County
StateMichigan
Coordinates43.3499, -84.6908
Functional classRural Major Collector

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.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than 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 rating71.2 US tons
Inventory rating42.7 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans2
Design loadHS 20 + Mod
Structure length129 ft (39.3 m)
Longest span63 ft (19.2 m)
Deck width33 ft (10.2 m)
Roadway width33 ft (10.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,020 (2003)
Projected traffic1,380 by 2023
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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 Harrison Road over Pine River built?

It was built in 1977, making it 48 years old in 2025.

What condition is Harrison Road over Pine 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 June 2023.

How much traffic does Harrison Road over Pine River carry?

About 1,020 vehicles per day (2003 count).

How long is Harrison Road over Pine River?

The structure is 129 ft (39.3 m) long with a longest span of 63 ft (19.2 m) and a deck 33 ft wide.

Who owns Harrison Road over Pine River?

It is owned by the County Highway Agency.