US Bridges

County RD 400 over Forty Seven Mile Creek

Good

Menominee County, Michigan · 2.0 Mi. SW of Perronville · Structure no. 000000000012616

Built
1999
26 years old
Condition
Good
inspected June 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
59 ft
1 main span
Daily traffic
20
2005 count
Owner
County
County Highway Agency

About this bridge

County RD 400 over Forty Seven Mile Creek is a prestressed concrete box beam or girders - multiple carrying County RD 400 over Forty Seven Mile Creek in Menominee County, Michigan. It was built in 1999, so it is 26 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 20 vehicles a day, projected to reach 25 by 2015. The structure is 59 ft (18 m) long and 32 ft wide. If it were closed, the detour would be 124.3 mi (200 km).

CarriesCounty RD 400
CrossesForty Seven Mile Creek
Location2.0 Mi. SW of Perronville
RouteCounty Highway 0
Coordinates45.76879, -87.3707
Functional classRural Local

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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
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 rating73.2 US tons
Inventory rating44 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20 + Mod
Structure length59 ft (18 m)
Longest span57 ft (17.4 m)
Deck width32 ft (9.8 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20 (2005)
Projected traffic25 by 2015
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed124.3 mi (200 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 County RD 400 over Forty Seven Mile Creek built?

It was built in 1999, making it 26 years old in 2025.

What condition is County RD 400 over Forty Seven Mile 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 June 2023.

How much traffic does County RD 400 over Forty Seven Mile Creek carry?

About 20 vehicles per day (2005 count).

How long is County RD 400 over Forty Seven Mile Creek?

The structure is 59 ft (18 m) long with a longest span of 57 ft (17.4 m) and a deck 32 ft wide.

Who owns County RD 400 over Forty Seven Mile Creek?

It is owned by the County Highway Agency.