US Bridges

Michigan Bar RD over Cosumnes River

FairPosted for load

Sacramento County, California · 1.2 MI N of S.R. 16 · Structure no. 24C0056

Built
1909
116 years old, rebuilt 1958
Condition
Fair
inspected April 2024
Type
Truss - Deck
Steel
Length
354 ft
2 main spans
Daily traffic
21
2011 count
Owner
County
County Highway Agency

About this bridge

Michigan Bar RD over Cosumnes River is a steel truss - deck carrying Michigan Bar RD over Cosumnes River in Sacramento County, California. It was built in 1909 and reconstructed in 1958, so it is 116 years old, older than the California average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: posted for load restriction.

It carries about 21 vehicles a day, roughly 10% of them trucks, projected to reach 37 by 2043. The structure is 354 ft (108 m) long and 11 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

Location

Open in Google Maps
CarriesMichigan Bar RD
CrossesCosumnes River
Location1.2 MI N of S.R. 16
RouteCounty Highway 0
CountySacramento County
StateCalifornia
Coordinates38.49994, -121.04509
Functional classRural 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
Deck7 GoodSome minor problems.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionApril 2024
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating27.1 US tons
Inventory rating16.1 US tons

Structure

Structure typeTruss - Deck
MaterialSteel
DeckConcrete, precast panels
Main spans2 (+2 approach)
Design loadUnknown
Structure length354 ft (108 m)
Longest span138 ft (42.1 m)
Deck width11 ft (3.4 m)
Roadway width10 ft (3.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic21 (2011)
Projected traffic37 by 2043
Trucks10%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.7 mi (14 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 Michigan Bar RD over Cosumnes River built?

It was built in 1909, making it 116 years old in 2025. It was reconstructed in 1958.

What condition is Michigan Bar RD over Cosumnes River 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 April 2024.

How much traffic does Michigan Bar RD over Cosumnes River carry?

About 21 vehicles per day (2011 count), of which roughly 10% are trucks.

How long is Michigan Bar RD over Cosumnes River?

The structure is 354 ft (108 m) long with a longest span of 138 ft (42.1 m) and a deck 11 ft wide.

Who owns Michigan Bar RD over Cosumnes River?

It is owned by the County Highway Agency.