US Bridges

Harrington Road over Speaker-Maple Valley Drn

FairPosted for load

Sanilac County, Michigan · Sec 21-28 Elk Twp · Structure no. 000000000009593

Built
1960
65 years old
Condition
Fair
inspected June 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
28 ft
1 main span
Daily traffic
300
2010 count
Owner
County
County Highway Agency

About this bridge

Harrington Road over Speaker-Maple Valley Drn is a steel stringer/multi-beam or girder carrying Harrington Road over Speaker-Maple Valley Drn in Sanilac County, Michigan. It was built in 1960, so it is 65 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. Its operating status is: posted for load restriction.

It carries about 300 vehicles a day, roughly 10% of them trucks, projected to reach 540 by 2030. The structure is 28 ft (8.5 m) long and 25 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesHarrington Road
CrossesSpeaker-Maple Valley Drn
LocationSec 21-28 Elk Twp
RouteCounty Highway 0
CountySanilac County
StateMichigan
Coordinates43.2725, -82.84552
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusPosted for load 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 adequacy6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating40.3 US tons
Inventory rating24.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length28 ft (8.5 m)
Longest span27 ft (8.1 m)
Deck width25 ft (7.6 m)
Roadway width24 ft (7.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic300 (2010)
Projected traffic540 by 2030
Trucks10%
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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$310,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Harrington Road over Speaker-Maple Valley Drn built?

It was built in 1960, making it 65 years old in 2025.

What condition is Harrington Road over Speaker-Maple Valley Drn 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 2024.

How much traffic does Harrington Road over Speaker-Maple Valley Drn carry?

About 300 vehicles per day (2010 count), of which roughly 10% are trucks.

How long is Harrington Road over Speaker-Maple Valley Drn?

The structure is 28 ft (8.5 m) long with a longest span of 27 ft (8.1 m) and a deck 25 ft wide.

Who owns Harrington Road over Speaker-Maple Valley Drn?

It is owned by the County Highway Agency.