US Bridges

Herr Road over Plum Creek

Fair

Monroe County, Michigan · 0.1 MI N of Dunbar Road · Structure no. 000000000007389

Built
1965
60 years old, rebuilt 2000
Condition
Fair
inspected September 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
35 ft
1 main span
Daily traffic
3,320
2014 count
Owner
County
County Highway Agency

About this bridge

Herr Road over Plum Creek is a prestressed concrete box beam or girders - multiple carrying Herr Road over Plum Creek in Monroe County, Michigan. It was built in 1965 and reconstructed in 2000, so it is 60 years old, older 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 3,320 vehicles a day, roughly 2% of them trucks, projected to reach 3,818 by 2034. The structure is 35 ft (10.6 m) long and 27 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesHerr Road
CrossesPlum Creek
Location0.1 MI N of Dunbar Road
RouteCounty Highway 2016
CountyMonroe County
StateMichigan
Coordinates41.91015, -83.44434
Functional classUrban Collector

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 inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating83.9 US tons
Inventory rating50.4 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadH 15
Structure length35 ft (10.6 m)
Longest span33 ft (10 m)
Deck width27 ft (8.3 m)
Roadway width27 ft (8.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,320 (2014)
Projected traffic3,818 by 2034
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 Herr Road over Plum Creek built?

It was built in 1965, making it 60 years old in 2025. It was reconstructed in 2000.

What condition is Herr Road over Plum Creek 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 2024.

How much traffic does Herr Road over Plum Creek carry?

About 3,320 vehicles per day (2014 count), of which roughly 2% are trucks.

How long is Herr Road over Plum Creek?

The structure is 35 ft (10.6 m) long with a longest span of 33 ft (10 m) and a deck 27 ft wide.

Who owns Herr Road over Plum Creek?

It is owned by the County Highway Agency.