US Bridges

Grassmere Road over East Br. Pigeon River

Fair

Huron County, Michigan · Sec. 19 Sheridan Twp. · Structure no. 000000000003661

Built
2003
22 years old
Condition
Fair
inspected September 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
38 ft
1 main span
Daily traffic
20
2009 count
Owner
County
County Highway Agency

About this bridge

Grassmere Road over East Br. Pigeon River is a prestressed concrete box beam or girders - multiple carrying Grassmere Road over East Br. Pigeon River in Huron County, Michigan. It was built in 2003, so it is 22 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 20 vehicles a day, roughly 1% of them trucks, projected to reach 36 by 2029. The structure is 38 ft (11.6 m) long and 31 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

Location

Open in Google Maps
CarriesGrassmere Road
CrossesEast Br. Pigeon River
LocationSec. 19 Sheridan Twp.
RouteCounty Highway 0
CountyHuron County
StateMichigan
Coordinates43.70755, -83.11873
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionSeptember 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 geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating94.2 US tons
Inventory rating56.4 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length38 ft (11.6 m)
Longest span33 ft (10.1 m)
Deck width31 ft (9.5 m)
Roadway width29 ft (8.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20 (2009)
Projected traffic36 by 2029
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.7 mi (14 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 Grassmere Road over East Br. Pigeon River built?

It was built in 2003, making it 22 years old in 2025.

What condition is Grassmere Road over East Br. Pigeon 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 September 2023.

How much traffic does Grassmere Road over East Br. Pigeon River carry?

About 20 vehicles per day (2009 count), of which roughly 1% are trucks.

How long is Grassmere Road over East Br. Pigeon River?

The structure is 38 ft (11.6 m) long with a longest span of 33 ft (10.1 m) and a deck 31 ft wide.

Who owns Grassmere Road over East Br. Pigeon River?

It is owned by the County Highway Agency.