US Bridges

Broomfield Road over Potter Creek Drain

Fair

Isabella County, Michigan · Sec 21 Chippewa Twp · Structure no. 000000000004277

Built
1969
56 years old
Condition
Fair
inspected May 2024
Type
Culvert
Steel
Length
33 ft
1 main span
Daily traffic
2,019
2015 count
Owner
County
County Highway Agency

About this bridge

Broomfield Road over Potter Creek Drain is a steel culvert carrying Broomfield Road over Potter Creek Drain in Isabella County, Michigan. It was built in 1969, so it is 56 years old, older 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 2,019 vehicles a day, roughly 2% of them trucks. The structure is 33 ft (10 m) long. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesBroomfield Road
CrossesPotter Creek Drain
LocationSec 21 Chippewa Twp
RouteCounty Highway 3732
CountyIsabella County
StateMichigan
Coordinates43.58269, -84.66923
Functional classRural Major Collector

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 protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMay 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
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating55 US tons
Inventory rating32.8 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans1
Design loadH 20
Structure length33 ft (10 m)
Longest span28 ft (8.5 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,019 (2015)
Projected traffic—
Trucks2%
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 Broomfield Road over Potter Creek Drain built?

It was built in 1969, making it 56 years old in 2025.

What condition is Broomfield Road over Potter Creek 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 May 2024.

How much traffic does Broomfield Road over Potter Creek Drain carry?

About 2,019 vehicles per day (2015 count), of which roughly 2% are trucks.

How long is Broomfield Road over Potter Creek Drain?

The structure is 33 ft (10 m) long with a longest span of 28 ft (8.5 m).

Who owns Broomfield Road over Potter Creek Drain?

It is owned by the County Highway Agency.