US Bridges

Brennan Road over Whitmore Drain

Fair

Saginaw County, Michigan · 0.2 MI N of Lunney · Structure no. 000000000009390

Built
1992
33 years old
Condition
Fair
inspected September 2024
Type
Culvert
Concrete
Length
34 ft
1 main span
Daily traffic
172
2008 count
Owner
County
County Highway Agency

About this bridge

Brennan Road over Whitmore Drain is a concrete culvert carrying Brennan Road over Whitmore Drain in Saginaw County, Michigan. It was built in 1992, so it is 33 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 172 vehicles a day, roughly 5% of them trucks, projected to reach 181 by 2018. The structure is 34 ft (10.3 m) long. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesBrennan Road
CrossesWhitmore Drain
Location0.2 MI N of Lunney
RouteCounty Highway 0
CountySaginaw County
StateMichigan
Coordinates43.44504, -84.24975
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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating85.3 US tons
Inventory rating51 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, precast panels
Main spans1
Design loadUnknown
Structure length34 ft (10.3 m)
Longest span22 ft (6.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic172 (2008)
Projected traffic181 by 2018
Trucks5%
Lanes on structure2
Traffic directionOne-lane bridge for two-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 Brennan Road over Whitmore Drain built?

It was built in 1992, making it 33 years old in 2025.

What condition is Brennan Road over Whitmore Drain 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 September 2024.

How much traffic does Brennan Road over Whitmore Drain carry?

About 172 vehicles per day (2008 count), of which roughly 5% are trucks.

How long is Brennan Road over Whitmore Drain?

The structure is 34 ft (10.3 m) long with a longest span of 22 ft (6.7 m).

Who owns Brennan Road over Whitmore Drain?

It is owned by the County Highway Agency.