US Bridges

Parkville Road over Portage River

Fair

St. Joseph County, Michigan · South of Parkville · Structure no. 000000000010312

Built
1961
64 years old
Condition
Fair
inspected November 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
80 ft
2 main spans
Daily traffic
1,127
2018 count
Owner
County
County Highway Agency

About this bridge

Parkville Road over Portage River is a prestressed concrete box beam or girders - multiple carrying Parkville Road over Portage River in St. Joseph County, Michigan. It was built in 1961, so it is 64 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 1,127 vehicles a day, roughly 10% of them trucks, projected to reach 1,197 by 2038. The structure is 80 ft (24.3 m) long and 33 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

Open in Google Maps
CarriesParkville Road
CrossesPortage River
LocationSouth of Parkville
RouteCounty Highway 0
CountySt. Joseph County
StateMichigan
Coordinates42.01425, -85.54786
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
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 protection7 GoodSome minor problems.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating60 US tons
Inventory rating35.9 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckOther
Main spans2
Design loadHS 20
Structure length80 ft (24.3 m)
Longest span40 ft (12.2 m)
Deck width33 ft (10.1 m)
Roadway width33 ft (10.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,127 (2018)
Projected traffic1,197 by 2038
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 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 Parkville Road over Portage River built?

It was built in 1961, making it 64 years old in 2025.

What condition is Parkville Road over Portage River 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 November 2023.

How much traffic does Parkville Road over Portage River carry?

About 1,127 vehicles per day (2018 count), of which roughly 10% are trucks.

How long is Parkville Road over Portage River?

The structure is 80 ft (24.3 m) long with a longest span of 40 ft (12.2 m) and a deck 33 ft wide.

Who owns Parkville Road over Portage River?

It is owned by the County Highway Agency.