US Bridges

Dorwood Road over Birch Run Creek

PoorPosted for load

Saginaw County, Michigan · 0.5 MI N of Busch Road · Structure no. 000000000009420

Built
1973
52 years old
Condition
Poor
inspected May 2024
Type
Tee Beam
Prestressed Concrete
Length
40 ft
1 main span
Daily traffic
467
2017 count
Owner
County
County Highway Agency

About this bridge

Dorwood Road over Birch Run Creek is a prestressed concrete tee beam carrying Dorwood Road over Birch Run Creek in Saginaw County, Michigan. It was built in 1973, so it is 52 years old, older than the Michigan average of 48.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.

It carries about 467 vehicles a day, roughly 5% of them trucks, projected to reach 490 by 2027. The structure is 40 ft (12.2 m) long and 28 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesDorwood Road
CrossesBirch Run Creek
Location0.5 MI N of Busch Road
RouteCounty Highway 0
Coordinates43.30559, -83.91405
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2024
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment7: Better than present minimum criteria
Operating rating39.6 US tons
Inventory rating23.8 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadH 20
Structure length40 ft (12.2 m)
Longest span37 ft (11.2 m)
Deck width28 ft (8.5 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic467 (2017)
Projected traffic490 by 2027
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Dorwood Road over Birch Run Creek built?

It was built in 1973, making it 52 years old in 2025.

What condition is Dorwood Road over Birch Run Creek in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in May 2024.

How much traffic does Dorwood Road over Birch Run Creek carry?

About 467 vehicles per day (2017 count), of which roughly 5% are trucks.

How long is Dorwood Road over Birch Run Creek?

The structure is 40 ft (12.2 m) long with a longest span of 37 ft (11.2 m) and a deck 28 ft wide.

Who owns Dorwood Road over Birch Run Creek?

It is owned by the County Highway Agency.