US Bridges

Route 577 over Little River

PoorPosted for load

Menominee County, Michigan · 2.5 MI W of Birch Creek · Structure no. 000000000006827

Built
1920
105 years old, rebuilt 1950
Condition
Poor
inspected June 2024
Type
Culvert
Concrete
Length
41 ft
4 main spans
Daily traffic
216
1998 count
Owner
County
County Highway Agency

About this bridge

Route 577 over Little River is a concrete culvert carrying Route 577 over Little River in Menominee County, Michigan. It was built in 1920 and reconstructed in 1950, so it is 105 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 3 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. Its operating status is: posted for load restriction.

It carries about 216 vehicles a day, roughly 2% of them trucks, projected to reach 350 by 2019. The structure is 41 ft (12.5 m) long. If it were closed, the detour would be 14.9 mi (24 km).

CarriesRoute 577
CrossesLittle River
Location2.5 MI W of Birch Creek
RouteCounty Highway 5523
Coordinates45.20476, -87.65907
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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
Last inspectionJune 2024
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating20 US tons
Inventory rating11.8 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans4
Design loadUnknown
Structure length41 ft (12.5 m)
Longest span9 ft (2.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic216 (1998)
Projected traffic350 by 2019
Trucks2%
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 Route 577 over Little River built?

It was built in 1920, making it 105 years old in 2025. It was reconstructed in 1950.

What condition is Route 577 over Little 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 June 2024.

How much traffic does Route 577 over Little River carry?

About 216 vehicles per day (1998 count), of which roughly 2% are trucks.

How long is Route 577 over Little River?

The structure is 41 ft (12.5 m) long with a longest span of 9 ft (2.7 m).

Who owns Route 577 over Little River?

It is owned by the County Highway Agency.