US Bridges

Riverside Drive over Big Munuscong R

Fair

Chippewa County, Michigan · 18 MI S of Sault Ste Mari · Structure no. 000000000001630

Built
1976
49 years old
Condition
Fair
inspected June 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete Continuous
Length
161 ft
2 main spans
Daily traffic
110
1986 count
Owner
County
County Highway Agency

About this bridge

Riverside Drive over Big Munuscong R is a prestressed concrete continuous box beam or girders - multiple carrying Riverside Drive over Big Munuscong R in Chippewa County, Michigan. It was built in 1976, so it is 49 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 110 vehicles a day, projected to reach 190 by 2019. The structure is 161 ft (49 m) long and 34 ft wide. If it were closed, the detour would be 21.7 mi (35 km).

Location

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CarriesRiverside Drive
CrossesBig Munuscong R
Location18 MI S of Sault Ste Mari
RouteCounty Highway 1763
CountyChippewa County
StateMichigan
Coordinates46.21617, -84.29022
Functional classRural Major Collector

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.
Superstructure8 Very GoodNo problems noted.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating106.5 US tons
Inventory rating38.9 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20 + Mod
Structure length161 ft (49 m)
Longest span79 ft (24 m)
Deck width34 ft (10.4 m)
Roadway width33 ft (10.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic110 (1986)
Projected traffic190 by 2019
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed21.7 mi (35 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$15,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Riverside Drive over Big Munuscong R built?

It was built in 1976, making it 49 years old in 2025.

What condition is Riverside Drive over Big Munuscong R 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 Riverside Drive over Big Munuscong R carry?

About 110 vehicles per day (1986 count).

How long is Riverside Drive over Big Munuscong R?

The structure is 161 ft (49 m) long with a longest span of 79 ft (24 m) and a deck 34 ft wide.

Who owns Riverside Drive over Big Munuscong R?

It is owned by the County Highway Agency.