US Bridges

Eaa Road over Big Brook

Good

Marquette County, Michigan · 2.5 MI NW of 438 HWY · Structure no. 000000000006582

Built
2007
18 years old
Condition
Good
inspected October 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
44 ft
1 main span
Daily traffic
20
2006 count
Owner
County
County Highway Agency

About this bridge

Eaa Road over Big Brook is a prestressed concrete box beam or girders - multiple carrying Eaa Road over Big Brook in Marquette County, Michigan. It was built in 2007, so it is 18 years old, younger than the Michigan average of 48.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 20 vehicles a day, projected to reach 30 by 2026. The structure is 44 ft (13.4 m) long and 30 ft wide. If it were closed, the detour would be 19.9 mi (32 km).

Location

Open in Google Maps
CarriesEaa Road
CrossesBig Brook
Location2.5 MI NW of 438 HWY
RouteCounty Highway 0
CountyMarquette County
StateMichigan
Coordinates46.21216, -87.61248
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating50.7 US tons
Inventory rating39.2 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length44 ft (13.4 m)
Longest span40 ft (12.2 m)
Deck width30 ft (9.1 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20 (2006)
Projected traffic30 by 2026
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed19.9 mi (32 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 Eaa Road over Big Brook built?

It was built in 2007, making it 18 years old in 2025.

What condition is Eaa Road over Big Brook in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in October 2023.

How much traffic does Eaa Road over Big Brook carry?

About 20 vehicles per day (2006 count).

How long is Eaa Road over Big Brook?

The structure is 44 ft (13.4 m) long with a longest span of 40 ft (12.2 m) and a deck 30 ft wide.

Who owns Eaa Road over Big Brook?

It is owned by the County Highway Agency.