US Bridges

Ggt Road over Boise Creek

Fair

Marquette County, Michigan · 3.7 MI SW of S10 HWY · Structure no. 000000000006588

Built
1935
90 years old, rebuilt 1993
Condition
Fair
inspected October 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
52 ft
1 main span
Daily traffic
50
2001 count
Owner
County
County Highway Agency

About this bridge

Ggt Road over Boise Creek is a steel stringer/multi-beam or girder carrying Ggt Road over Boise Creek in Marquette County, Michigan. It was built in 1935 and reconstructed in 1993, so it is 90 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 50 vehicles a day, projected to reach 50 by 2020. The structure is 52 ft (15.8 m) long and 16 ft wide. If it were closed, the detour would be 39.8 mi (64 km).

Location

Open in Google Maps
CarriesGgt Road
CrossesBoise Creek
Location3.7 MI SW of S10 HWY
RouteCounty Highway 0
CountyMarquette County
StateMichigan
Coordinates46.60952, -87.70188
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating110.1 US tons
Inventory rating66.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckWood or timber
Main spans1
Design loadHS 20 + Mod
Structure length52 ft (15.8 m)
Longest span46 ft (14 m)
Deck width16 ft (4.8 m)
Roadway width16 ft (4.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (2001)
Projected traffic50 by 2020
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed39.8 mi (64 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 Ggt Road over Boise Creek built?

It was built in 1935, making it 90 years old in 2025. It was reconstructed in 1993.

What condition is Ggt Road over Boise Creek 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 October 2024.

How much traffic does Ggt Road over Boise Creek carry?

About 50 vehicles per day (2001 count).

How long is Ggt Road over Boise Creek?

The structure is 52 ft (15.8 m) long with a longest span of 46 ft (14 m) and a deck 16 ft wide.

Who owns Ggt Road over Boise Creek?

It is owned by the County Highway Agency.