US Bridges

Bonifas RD over Marina Outlet

Fair

Delta County, Michigan · Escanaba Marina · Structure no. 000000000013324

Built
1934
91 years old
Condition
Fair
inspected June 2023
Type
Culvert
Steel
Length
42 ft
2 main spans
Daily traffic
1,500
1960 count
Owner
City
City or Municipal Highway Agency

About this bridge

Bonifas RD over Marina Outlet is a steel culvert carrying Bonifas RD over Marina Outlet in Delta County, Michigan. It was built in 1934, so it is 91 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 1,500 vehicles a day, projected to reach 1,725 by 1980. The structure is 42 ft (12.8 m) long. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesBonifas RD
CrossesMarina Outlet
LocationEscanaba Marina
RouteCity Street 0
CountyDelta County
StateMichigan
Coordinates45.7397, -87.04834
Functional classUrban 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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans2
Design loadH 20
Structure length42 ft (12.8 m)
Longest span20 ft (6.1 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,500 (1960)
Projected traffic1,725 by 1980
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 Bonifas RD over Marina Outlet built?

It was built in 1934, making it 91 years old in 2025.

What condition is Bonifas RD over Marina Outlet 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 June 2023.

How much traffic does Bonifas RD over Marina Outlet carry?

About 1,500 vehicles per day (1960 count).

How long is Bonifas RD over Marina Outlet?

The structure is 42 ft (12.8 m) long with a longest span of 20 ft (6.1 m).

Who owns Bonifas RD over Marina Outlet?

It is owned by the City or Municipal Highway Agency.