US Bridges

Ridge Road over Macon Creek

Good

Washtenaw County, Michigan · York Twp Sec 31 · Structure no. 000000000010962

Built
2017
8 years old
Condition
Good
inspected November 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
42 ft
1 main span
Daily traffic
6,169
2016 count
Owner
County
County Highway Agency

About this bridge

Ridge Road over Macon Creek is a prestressed concrete stringer/multi-beam or girder carrying Ridge Road over Macon Creek in Washtenaw County, Michigan. It was built in 2017, so it is 8 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 6,169 vehicles a day, roughly 4% of them trucks, projected to reach 7,093 by 2036. The structure is 42 ft (12.8 m) long and 41 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesRidge Road
CrossesMacon Creek
LocationYork Twp Sec 31
RouteCounty Highway 8161
CountyWashtenaw County
StateMichigan
Coordinates42.08668, -83.76203
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.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation8: Equal to present desirable 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 rating107.1 US tons
Inventory rating87.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadGreater than HL 93
Structure length42 ft (12.8 m)
Longest span39 ft (12 m)
Deck width41 ft (12.5 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,169 (2016)
Projected traffic7,093 by 2036
Trucks4%
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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$230,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Ridge Road over Macon Creek built?

It was built in 2017, making it 8 years old in 2025.

What condition is Ridge Road over Macon Creek 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 November 2023.

How much traffic does Ridge Road over Macon Creek carry?

About 6,169 vehicles per day (2016 count), of which roughly 4% are trucks.

How long is Ridge Road over Macon Creek?

The structure is 42 ft (12.8 m) long with a longest span of 39 ft (12 m) and a deck 41 ft wide.

Who owns Ridge Road over Macon Creek?

It is owned by the County Highway Agency.