US Bridges

M-47 NB over CSX RR

Fair

Saginaw County, Michigan · 1.7 MI S of N CO Line · Structure no. 000000000009104

Built
1960
65 years old, rebuilt 2004
Condition
Fair
inspected February 2024
Type
Box Beam or Girders - Single or Spread
Prestressed Concrete
Length
182 ft
3 main spans
Daily traffic
4,151
2007 count
Owner
State
State Highway Agency

About this bridge

M-47 NB over CSX RR is a prestressed concrete box beam or girders - single or spread carrying M-47 NB over CSX RR in Saginaw County, Michigan. It was built in 1960 and reconstructed in 2004, so it is 65 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 5 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 4,151 vehicles a day, roughly 6% of them trucks, projected to reach 6,941 by 2018. The structure is 182 ft (55.6 m) long and 47 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesM-47 NB
CrossesCSX RR
Location1.7 MI S of N CO Line
RouteState Highway 47
CountySaginaw County
StateMichigan
Coordinates43.54361, -84.1387
Functional classRural Principal Arterial - Other

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating82.5 US tons
Inventory rating49.3 US tons

Structure

Structure typeBox Beam or Girders - Single or Spread
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 25 or greater
Structure length182 ft (55.6 m)
Longest span61 ft (18.6 m)
Deck width47 ft (14.2 m)
Roadway width43 ft (13.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,151 (2007)
Projected traffic6,941 by 2018
Trucks6%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesRailroad
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedDeck replacement with only incidental widening
Estimated improvement cost$122,000
NavigationNot applicable (no waterway)

Frequently asked questions

When was M-47 NB over CSX RR built?

It was built in 1960, making it 65 years old in 2025. It was reconstructed in 2004.

What condition is M-47 NB over CSX RR 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 February 2024.

How much traffic does M-47 NB over CSX RR carry?

About 4,151 vehicles per day (2007 count), of which roughly 6% are trucks.

How long is M-47 NB over CSX RR?

The structure is 182 ft (55.6 m) long with a longest span of 61 ft (18.6 m) and a deck 47 ft wide.

Who owns M-47 NB over CSX RR?

It is owned by the State Highway Agency.