US Bridges

Millbrook Road over Cedar Creek

Fair

Isabella County, Michigan · 0.6 M E SW Cor Sec 34 T14 · Structure no. 000000000004345

Built
1979
46 years old
Condition
Fair
inspected July 2024
Type
Tee Beam
Prestressed Concrete
Length
28 ft
1 main span
Daily traffic
83
2002 count
Owner
County
County Highway Agency

About this bridge

Millbrook Road over Cedar Creek is a prestressed concrete tee beam carrying Millbrook Road over Cedar Creek in Isabella County, Michigan. It was built in 1979, so it is 46 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 5 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 83 vehicles a day, projected to reach 102 by 2022. The structure is 28 ft (8.5 m) long and 32 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesMillbrook Road
CrossesCedar Creek
Location0.6 M E SW Cor Sec 34 T14
RouteCounty Highway 0
CountyIsabella County
StateMichigan
Coordinates43.55316, -84.89565
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating69.9 US tons
Inventory rating41.9 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadH 20
Structure length28 ft (8.5 m)
Longest span24 ft (7.3 m)
Deck width32 ft (9.7 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic83 (2002)
Projected traffic102 by 2022
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 Millbrook Road over Cedar Creek built?

It was built in 1979, making it 46 years old in 2025.

What condition is Millbrook Road over Cedar 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 July 2024.

How much traffic does Millbrook Road over Cedar Creek carry?

About 83 vehicles per day (2002 count).

How long is Millbrook Road over Cedar Creek?

The structure is 28 ft (8.5 m) long with a longest span of 24 ft (7.3 m) and a deck 32 ft wide.

Who owns Millbrook Road over Cedar Creek?

It is owned by the County Highway Agency.