US Bridges

Copps Mine Road over Presque Isle River

PoorClosed to traffic

Gogebic County, Michigan · Sec 28 Marenisco Twp · Structure no. 000000000002998

Built
1906
119 years old
Condition
Poor
inspected September 2024
Type
Truss - Thru
Steel
Length
70 ft
1 main span
Daily traffic
10
1998 count
Owner
County
County Highway Agency

About this bridge

Copps Mine Road over Presque Isle River is a steel truss - thru carrying Copps Mine Road over Presque Isle River in Gogebic County, Michigan. It was built in 1906, so it is 119 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 1 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: closed to all traffic.

It carries about 10 vehicles a day, projected to reach 10 by 2018. The structure is 70 ft (21.3 m) long and 14 ft wide. If it were closed, the detour would be 124.3 mi (200 km).

Location

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CarriesCopps Mine Road
CrossesPresque Isle River
LocationSec 28 Marenisco Twp
RouteCounty Highway 0
CountyGogebic County
StateMichigan
Coordinates46.44511, -89.69415
Functional classRural Major Collector

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
Deck1 Imminent FailureMajor deterioration or section loss present in critical structural components. Bridge is closed to traffic but corrective action may put it back in light service.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure2 CriticalAdvanced deterioration of primary structural elements. Bridge may be closed until corrective action is taken.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2024
Inspection intervalevery 12 months
Operating statusClosed to all traffic
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation0: Immediate repair necessary to put back in service
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating0 US tons
Inventory rating0 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckWood or timber
Main spans1
Design loadH 10
Structure length70 ft (21.3 m)
Longest span68 ft (20.7 m)
Deck width14 ft (4.2 m)
Roadway width12 ft (3.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10 (1998)
Projected traffic10 by 2018
Trucks0%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed124.3 mi (200 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$494,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Copps Mine Road over Presque Isle River built?

It was built in 1906, making it 119 years old in 2025.

What condition is Copps Mine Road over Presque Isle 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 September 2024.

How much traffic does Copps Mine Road over Presque Isle River carry?

About 10 vehicles per day (1998 count).

How long is Copps Mine Road over Presque Isle River?

The structure is 70 ft (21.3 m) long with a longest span of 68 ft (20.7 m) and a deck 14 ft wide.

Who owns Copps Mine Road over Presque Isle River?

It is owned by the County Highway Agency.