US Bridges

Norwich Road FH53 over W Br Ontonagon River

Fair

Ontonagon County, Michigan · 15 MI S of Ontonagon · Structure no. 000000000008523

Built
1994
31 years old
Condition
Fair
inspected October 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
130 ft
2 main spans
Daily traffic
110
1997 count
Owner
County
County Highway Agency

About this bridge

Norwich Road FH53 over W Br Ontonagon River is a prestressed concrete box beam or girders - multiple carrying Norwich Road FH53 over W Br Ontonagon River in Ontonagon County, Michigan. It was built in 1994, so it is 31 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 110 vehicles a day, projected to reach 250 by 2017. The structure is 130 ft (39.6 m) long and 31 ft wide. If it were closed, the detour would be 24.9 mi (40 km).

Location

Open in Google Maps
CarriesNorwich Road FH53
CrossesW Br Ontonagon River
Location15 MI S of Ontonagon
RouteCounty Highway 6647
CountyOntonagon County
StateMichigan
Coordinates46.65299, -89.38545
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating90.3 US tons
Inventory rating54.1 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length130 ft (39.6 m)
Longest span65 ft (19.8 m)
Deck width31 ft (9.4 m)
Roadway width30 ft (9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic110 (1997)
Projected traffic250 by 2017
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed24.9 mi (40 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 Norwich Road FH53 over W Br Ontonagon River built?

It was built in 1994, making it 31 years old in 2025.

What condition is Norwich Road FH53 over W Br Ontonagon 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 October 2023.

How much traffic does Norwich Road FH53 over W Br Ontonagon River carry?

About 110 vehicles per day (1997 count).

How long is Norwich Road FH53 over W Br Ontonagon River?

The structure is 130 ft (39.6 m) long with a longest span of 65 ft (19.8 m) and a deck 31 ft wide.

Who owns Norwich Road FH53 over W Br Ontonagon River?

It is owned by the County Highway Agency.