US Bridges

County RD 557 over Little West River

Poor

Marquette County, Michigan · 5 Miles N of Mashek · Structure no. 000000000006524

Built
1928
97 years old
Condition
Poor
inspected October 2024
Type
Tee Beam
Concrete
Length
23 ft
1 main span
Daily traffic
525
2001 count
Owner
County
County Highway Agency

About this bridge

County RD 557 over Little West River is a concrete tee beam carrying County RD 557 over Little West River in Marquette County, Michigan. It was built in 1928, so it is 97 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 525 vehicles a day, projected to reach 530 by 2020. The structure is 23 ft (7 m) long and 38 ft wide. If it were closed, the detour would be 29.8 mi (48 km).

Location

Open in Google Maps
CarriesCounty RD 557
CrossesLittle West River
Location5 Miles N of Mashek
RouteCounty Highway 5271
CountyMarquette County
StateMichigan
Coordinates46.12155, -87.47032
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48 US tons
Inventory rating36 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length23 ft (7 m)
Longest span20 ft (6.1 m)
Deck width38 ft (11.5 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic525 (2001)
Projected traffic530 by 2020
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed29.8 mi (48 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 County RD 557 over Little West River built?

It was built in 1928, making it 97 years old in 2025.

What condition is County RD 557 over Little West 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 October 2024.

How much traffic does County RD 557 over Little West River carry?

About 525 vehicles per day (2001 count).

How long is County RD 557 over Little West River?

The structure is 23 ft (7 m) long with a longest span of 20 ft (6.1 m) and a deck 38 ft wide.

Who owns County RD 557 over Little West River?

It is owned by the County Highway Agency.