US Bridges

Brennan Road over Griffus Creek

Fair

Saginaw County, Michigan · 0.4 MI N of Baldwin Road · Structure no. 000000000009303

Built
1987
38 years old
Condition
Fair
inspected August 2024
Type
Tee Beam
Prestressed Concrete
Length
51 ft
2 main spans
Daily traffic
46
2024 count
Owner
County
County Highway Agency

About this bridge

Brennan Road over Griffus Creek is a prestressed concrete tee beam carrying Brennan Road over Griffus Creek in Saginaw County, Michigan. It was built in 1987, so it is 38 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 46 vehicles a day, roughly 5% of them trucks, projected to reach 60 by 2034. The structure is 51 ft (15.5 m) long and 32 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesBrennan Road
CrossesGriffus Creek
Location0.4 MI N of Baldwin Road
RouteCounty Highway 0
Coordinates43.20736, -84.24799
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating82.1 US tons
Inventory rating49.6 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans2
Design loadHS 20 + Mod
Structure length51 ft (15.5 m)
Longest span25 ft (7.6 m)
Deck width32 ft (9.8 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic46 (2024)
Projected traffic60 by 2034
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 Brennan Road over Griffus Creek built?

It was built in 1987, making it 38 years old in 2025.

What condition is Brennan Road over Griffus Creek 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 August 2024.

How much traffic does Brennan Road over Griffus Creek carry?

About 46 vehicles per day (2024 count), of which roughly 5% are trucks.

How long is Brennan Road over Griffus Creek?

The structure is 51 ft (15.5 m) long with a longest span of 25 ft (7.6 m) and a deck 32 ft wide.

Who owns Brennan Road over Griffus Creek?

It is owned by the County Highway Agency.