US Bridges

Parmalee Road over Thornapple River

Poor

Barry County, Michigan · 3 MI N of Middleville · Structure no. 000000000000554

Built
1968
57 years old
Condition
Poor
inspected July 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
150 ft
3 main spans
Daily traffic
1,147
2015 count
Owner
County
County Highway Agency

About this bridge

Parmalee Road over Thornapple River is a prestressed concrete box beam or girders - multiple carrying Parmalee Road over Thornapple River in Barry County, Michigan. It was built in 1968, so it is 57 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.

It carries about 1,147 vehicles a day, roughly 2% of them trucks, projected to reach 1,205 by 2035. The structure is 150 ft (45.7 m) long and 33 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesParmalee Road
CrossesThornapple River
Location3 MI N of Middleville
RouteCounty Highway 892
Coordinates42.75571, -85.46125
Functional classRural Major Collector

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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2024
Inspection intervalevery 12 months
Operating statusOpen, no 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 adequacy6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating61.8 US tons
Inventory rating37.1 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans3
Design loadHS 20 + Mod
Structure length150 ft (45.7 m)
Longest span50 ft (15.2 m)
Deck width33 ft (10.1 m)
Roadway width31 ft (9.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,147 (2015)
Projected traffic1,205 by 2035
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$8,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Parmalee Road over Thornapple River built?

It was built in 1968, making it 57 years old in 2025.

What condition is Parmalee Road over Thornapple River 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 July 2024.

How much traffic does Parmalee Road over Thornapple River carry?

About 1,147 vehicles per day (2015 count), of which roughly 2% are trucks.

How long is Parmalee Road over Thornapple River?

The structure is 150 ft (45.7 m) long with a longest span of 50 ft (15.2 m) and a deck 33 ft wide.

Who owns Parmalee Road over Thornapple River?

It is owned by the County Highway Agency.