US Bridges

S Harper Drive over Little Manistee River

Fair

Lake County, Michigan · 3 Miles SW of Irons · Structure no. 000000000005292

Built
1979
46 years old
Condition
Fair
inspected May 2023
Type
Box Beam or Girders - Multiple
Concrete
Length
52 ft
1 main span
Daily traffic
115
2007 count
Owner
County
County Highway Agency

About this bridge

S Harper Drive over Little Manistee River is a concrete box beam or girders - multiple carrying S Harper Drive over Little Manistee River in Lake 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 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 115 vehicles a day, projected to reach 210 by 2027. The structure is 52 ft (15.8 m) long and 31 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesS Harper Drive
CrossesLittle Manistee River
Location3 Miles SW of Irons
RouteCounty Highway 0
CountyLake County
StateMichigan
Coordinates44.11551, -85.97305
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 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 geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating62.2 US tons
Inventory rating37.1 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length52 ft (15.8 m)
Longest span47 ft (14.3 m)
Deck width31 ft (9.3 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic115 (2007)
Projected traffic210 by 2027
Trucks0%
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 S Harper Drive over Little Manistee River built?

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

What condition is S Harper Drive over Little Manistee 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 May 2023.

How much traffic does S Harper Drive over Little Manistee River carry?

About 115 vehicles per day (2007 count).

How long is S Harper Drive over Little Manistee River?

The structure is 52 ft (15.8 m) long with a longest span of 47 ft (14.3 m) and a deck 31 ft wide.

Who owns S Harper Drive over Little Manistee River?

It is owned by the County Highway Agency.