US Bridges

Sigler RD over I-75

Poor

Monroe County, Michigan · 2.8 MI SW of Wayne Col · Structure no. 000000000007202

Built
1954
71 years old
Condition
Poor
inspected September 2024
Type
Tee Beam
Concrete Continuous
Length
262 ft
4 main spans
Daily traffic
270
1995 count
Owner
State
State Highway Agency

About this bridge

Sigler RD over I-75 is a concrete continuous tee beam carrying Sigler RD over I-75 in Monroe County, Michigan. It was built in 1954, so it is 71 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 4 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.

It carries about 270 vehicles a day, roughly 3% of them trucks, projected to reach 270 by 2015. The structure is 262 ft (79.8 m) long and 31 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesSigler RD
CrossesI-75
Location2.8 MI SW of Wayne Col
RouteCounty Highway 0
CountyMonroe County
StateMichigan
Coordinates42.03729, -83.2872
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
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionSeptember 2024
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length262 ft (79.8 m)
Longest span78 ft (23.7 m)
Deck width31 ft (9.5 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic270 (1995)
Projected traffic270 by 2015
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusListed on the National Register of Historic Places
Work proposedDeck replacement with only incidental widening
Estimated improvement cost$107,000
NavigationNot applicable (no waterway)

Frequently asked questions

When was Sigler RD over I-75 built?

It was built in 1954, making it 71 years old in 2025.

What condition is Sigler RD over I-75 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 Sigler RD over I-75 carry?

About 270 vehicles per day (1995 count), of which roughly 3% are trucks.

How long is Sigler RD over I-75?

The structure is 262 ft (79.8 m) long with a longest span of 78 ft (23.7 m) and a deck 31 ft wide.

Who owns Sigler RD over I-75?

It is owned by the State Highway Agency.