US Bridges

N County Line Road over Pine River

Fair

Gratiot County, Michigan · Sec 3 Bethany Twp · Structure no. 000000000003187

Built
1985
40 years old
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
156 ft
2 main spans
Daily traffic
77
2004 count
Owner
County
County Highway Agency

About this bridge

N County Line Road over Pine River is a prestressed concrete stringer/multi-beam or girder carrying N County Line Road over Pine River in Gratiot County, Michigan. It was built in 1985, so it is 40 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 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 77 vehicles a day, projected to reach 98 by 2024. The structure is 156 ft (47.5 m) long and 31 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesN County Line Road
CrossesPine River
LocationSec 3 Bethany Twp
RouteCounty Highway 0
CountyGratiot County
StateMichigan
Coordinates43.46611, -84.54248
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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating76.9 US tons
Inventory rating42.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20 + Mod
Structure length156 ft (47.5 m)
Longest span76 ft (23.1 m)
Deck width31 ft (9.4 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic77 (2004)
Projected traffic98 by 2024
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 N County Line Road over Pine River built?

It was built in 1985, making it 40 years old in 2025.

What condition is N County Line 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 July 2024.

How much traffic does N County Line Road over Pine River carry?

About 77 vehicles per day (2004 count).

How long is N County Line Road over Pine River?

The structure is 156 ft (47.5 m) long with a longest span of 76 ft (23.1 m) and a deck 31 ft wide.

Who owns N County Line Road over Pine River?

It is owned by the County Highway Agency.