US Bridges

P Drive South over Lampson Run

Fair

Calhoun County, Michigan · Homer Twp Sec 8 · Structure no. 000000000001299

Built
1973
52 years old, rebuilt 2019
Condition
Fair
inspected July 2023
Type
Slab
Wood or Timber
Length
32 ft
1 main span
Daily traffic
681
1995 count
Owner
County
County Highway Agency

About this bridge

P Drive South over Lampson Run is a wood or timber slab carrying P Drive South over Lampson Run in Calhoun County, Michigan. It was built in 1973 and reconstructed in 2019, so it is 52 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 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 681 vehicles a day, roughly 14% of them trucks, projected to reach 1,219 by 2023. The structure is 32 ft (9.7 m) long and 32 ft wide. If it were closed, the detour would be 14.9 mi (24 km).

Location

Open in Google Maps
CarriesP Drive South
CrossesLampson Run
LocationHomer Twp Sec 8
RouteCounty Highway 1316
CountyCalhoun County
StateMichigan
Coordinates42.13017, -84.79628
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating52.5 US tons
Inventory rating40.3 US tons

Structure

Structure typeSlab
MaterialWood or Timber
DeckWood or timber
Main spans1
Design loadHL 93
Structure length32 ft (9.7 m)
Longest span32 ft (9.7 m)
Deck width32 ft (9.8 m)
Roadway width15 ft (4.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic681 (1995)
Projected traffic1,219 by 2023
Trucks14%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.9 mi (24 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 P Drive South over Lampson Run built?

It was built in 1973, making it 52 years old in 2025. It was reconstructed in 2019.

What condition is P Drive South over Lampson Run 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 2023.

How much traffic does P Drive South over Lampson Run carry?

About 681 vehicles per day (1995 count), of which roughly 14% are trucks.

How long is P Drive South over Lampson Run?

The structure is 32 ft (9.7 m) long with a longest span of 32 ft (9.7 m) and a deck 32 ft wide.

Who owns P Drive South over Lampson Run?

It is owned by the County Highway Agency.