US Bridges

Cone RD over North Macon Creek

Fair

Monroe County, Michigan · .25 MI W of US 23 · Structure no. 000000000007261

Built
1950
75 years old, rebuilt 2021
Condition
Fair
inspected August 2023
Type
Box Beam or Girders - Single or Spread
Steel
Length
42 ft
1 main span
Daily traffic
1,770
2020 count
Owner
County
County Highway Agency

About this bridge

Cone RD over North Macon Creek is a steel box beam or girders - single or spread carrying Cone RD over North Macon Creek in Monroe County, Michigan. It was built in 1950 and reconstructed in 2021, so it is 75 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 1,770 vehicles a day, roughly 19% of them trucks, projected to reach 1,956 by 2040. The structure is 42 ft (12.8 m) long and 35 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

Open in Google Maps
CarriesCone RD
CrossesNorth Macon Creek
Location.25 MI W of US 23
RouteCounty Highway 5817
CountyMonroe County
StateMichigan
Coordinates42.0334, -83.68157
Functional classRural Major 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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2023
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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating107.1 US tons
Inventory rating105.4 US tons

Structure

Structure typeBox Beam or Girders - Single or Spread
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadGreater than HL 93
Structure length42 ft (12.8 m)
Longest span37 ft (11.4 m)
Deck width35 ft (10.7 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,770 (2020)
Projected traffic1,956 by 2040
Trucks19%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 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 Cone RD over North Macon Creek built?

It was built in 1950, making it 75 years old in 2025. It was reconstructed in 2021.

What condition is Cone RD over North Macon 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 August 2023.

How much traffic does Cone RD over North Macon Creek carry?

About 1,770 vehicles per day (2020 count), of which roughly 19% are trucks.

How long is Cone RD over North Macon Creek?

The structure is 42 ft (12.8 m) long with a longest span of 37 ft (11.4 m) and a deck 35 ft wide.

Who owns Cone RD over North Macon Creek?

It is owned by the County Highway Agency.