US Bridges

Howell HWY over River Raisin

Fair

Lenawee County, Michigan · 0.5 MI North of Oakwood R · Structure no. 000000000005599

Built
1959
66 years old
Condition
Fair
inspected June 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
132 ft
3 main spans
Daily traffic
2,078
2011 count
Owner
County
County Highway Agency

About this bridge

Howell HWY over River Raisin is a prestressed concrete box beam or girders - multiple carrying Howell HWY over River Raisin in Lenawee County, Michigan. It was built in 1959, so it is 66 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 5 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 2,078 vehicles a day, roughly 4% of them trucks, projected to reach 3,000 by 2031. The structure is 132 ft (40.2 m) long and 31 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesHowell HWY
CrossesRiver Raisin
Location0.5 MI North of Oakwood R
RouteCounty Highway 2017
CountyLenawee County
StateMichigan
Coordinates41.91778, -84.01013
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating58.6 US tons
Inventory rating35.2 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans3
Design loadH 20
Structure length132 ft (40.2 m)
Longest span44 ft (13.4 m)
Deck width31 ft (9.3 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,078 (2011)
Projected traffic3,000 by 2031
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 Howell HWY over River Raisin built?

It was built in 1959, making it 66 years old in 2025.

What condition is Howell HWY over River Raisin 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 June 2023.

How much traffic does Howell HWY over River Raisin carry?

About 2,078 vehicles per day (2011 count), of which roughly 4% are trucks.

How long is Howell HWY over River Raisin?

The structure is 132 ft (40.2 m) long with a longest span of 44 ft (13.4 m) and a deck 31 ft wide.

Who owns Howell HWY over River Raisin?

It is owned by the County Highway Agency.