US Bridges

Black River Falls over Black River

PoorPosted for load

Marquette County, Michigan · 1.3 MI W of CR 581 · Structure no. 000000000013723

Built
1930
95 years old
Condition
Poor
inspected October 2024
Type
Girder and Floorbeam System
Steel
Length
33 ft
1 main span
Daily traffic
10
2013 count
Owner
State
Other State Agency

About this bridge

Black River Falls over Black River is a steel girder and floorbeam system carrying Black River Falls over Black River in Marquette County, Michigan. It was built in 1930, so it is 95 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 2 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. Its operating status is: posted for load restriction.

It carries about 10 vehicles a day, projected to reach 10 by 2033. The structure is 33 ft (10.2 m) long and 12 ft wide. If it were closed, the detour would be 198.8 mi (320 km).

CarriesBlack River Falls
CrossesBlack River
Location1.3 MI W of CR 581
RouteState Lands Road 0
Coordinates46.3927, -87.7986
Functional classRural Local

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
Deck2 CriticalAdvanced deterioration of primary structural elements. Bridge may be closed until corrective action is taken.
Superstructure2 CriticalAdvanced deterioration of primary structural elements. Bridge may be closed until corrective action is taken.
Substructure2 CriticalAdvanced deterioration of primary structural elements. Bridge may be closed until corrective action is taken.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionOctober 2024
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation2: Basically intolerable, requiring high priority of replacement
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating38.9 US tons
Inventory rating23.3 US tons

Structure

MaterialSteel
DeckWood or timber
Main spans1
Design loadUnknown
Structure length33 ft (10.2 m)
Longest span31 ft (9.6 m)
Deck width12 ft (3.7 m)
Roadway width11 ft (3.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10 (2013)
Projected traffic10 by 2033
Trucks0%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed198.8 mi (320 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerOther State Agency
Maintained byOther State 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 Black River Falls over Black River built?

It was built in 1930, making it 95 years old in 2025.

What condition is Black River Falls over Black 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 Black River Falls over Black River carry?

About 10 vehicles per day (2013 count).

How long is Black River Falls over Black River?

The structure is 33 ft (10.2 m) long with a longest span of 31 ft (9.6 m) and a deck 12 ft wide.

Who owns Black River Falls over Black River?

It is owned by the Other State Agency.