US Bridges

Gga Road over Boise Creek

Fair

Marquette County, Michigan · 2.0 MI W of 510 HWY · Structure no. 000000000006586

Built
1980
45 years old, rebuilt 2019
Condition
Fair
inspected October 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
42 ft
1 main span
Daily traffic
10
1994 count
Owner
County
County Highway Agency

About this bridge

Gga Road over Boise Creek is a steel stringer/multi-beam or girder carrying Gga Road over Boise Creek in Marquette County, Michigan. It was built in 1980 and reconstructed in 2019, so it is 45 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 5 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 10 vehicles a day, projected to reach 10 by 2020. The structure is 42 ft (12.8 m) long and 20 ft wide. If it were closed, the detour would be 124.9 mi (201 km).

Location

Open in Google Maps
CarriesGga Road
CrossesBoise Creek
Location2.0 MI W of 510 HWY
RouteCounty Highway 0
CountyMarquette County
StateMichigan
Coordinates46.64136, -87.70139
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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure8 Very GoodNo problems noted.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating38.3 US tons
Inventory rating29.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckWood or timber
Main spans1
Design loadHS 20 + Mod
Structure length42 ft (12.8 m)
Longest span38 ft (11.6 m)
Deck width20 ft (6.1 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10 (1994)
Projected traffic10 by 2020
Trucks0%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed124.9 mi (201 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$67,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Gga Road over Boise Creek built?

It was built in 1980, making it 45 years old in 2025. It was reconstructed in 2019.

What condition is Gga 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 2023.

How much traffic does Gga Road over Boise Creek carry?

About 10 vehicles per day (1994 count).

How long is Gga Road over Boise Creek?

The structure is 42 ft (12.8 m) long with a longest span of 38 ft (11.6 m) and a deck 20 ft wide.

Who owns Gga Road over Boise Creek?

It is owned by the County Highway Agency.