US Bridges

Dickerson Road over Allen Drain

Good

Tuscola County, Michigan · Sec 17-20 Akron Twp · Structure no. 000000000010477

Built
1971
54 years old
Condition
Good
inspected April 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
30 ft
1 main span
Daily traffic
1,300
2009 count
Owner
County
County Highway Agency

About this bridge

Dickerson Road over Allen Drain is a prestressed concrete box beam or girders - multiple carrying Dickerson Road over Allen Drain in Tuscola County, Michigan. It was built in 1971, so it is 54 years old, older 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 1,300 vehicles a day, projected to reach 2,350 by 2029. The structure is 30 ft (9.1 m) long and 36 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesDickerson Road
CrossesAllen Drain
LocationSec 17-20 Akron Twp
RouteCounty Highway 7986
CountyTuscola County
StateMichigan
Coordinates43.60928, -83.56476
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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating72.1 US tons
Inventory rating43.2 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length30 ft (9.1 m)
Longest span28 ft (8.4 m)
Deck width36 ft (11.1 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,300 (2009)
Projected traffic2,350 by 2029
Trucks0%
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 Dickerson Road over Allen Drain built?

It was built in 1971, making it 54 years old in 2025.

What condition is Dickerson Road over Allen Drain 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 April 2023.

How much traffic does Dickerson Road over Allen Drain carry?

About 1,300 vehicles per day (2009 count).

How long is Dickerson Road over Allen Drain?

The structure is 30 ft (9.1 m) long with a longest span of 28 ft (8.4 m) and a deck 36 ft wide.

Who owns Dickerson Road over Allen Drain?

It is owned by the County Highway Agency.