US Bridges

Hill RD over I-475

Fair

Genesee County, Michigan · 2.5 MI S of Flint City Lt · Structure no. 000000000002649

Built
1971
54 years old, rebuilt 2009
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
230 ft
2 main spans
Daily traffic
28,640
1996 count
Owner
State
State Highway Agency

About this bridge

Hill RD over I-475 is a steel stringer/multi-beam or girder carrying Hill RD over I-475 in Genesee County, Michigan. It was built in 1971 and reconstructed in 2009, so it is 54 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 28,640 vehicles a day, roughly 5% of them trucks, projected to reach 34,700 by 2030. The structure is 230 ft (70.1 m) long and 105 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesHill RD
CrossesI-475
Location2.5 MI S of Flint City Lt
RouteCounty Highway 2002
CountyGenesee County
StateMichigan
Coordinates42.94405, -83.68139
Functional classUrban Other Principal Arterial

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating76.1 US tons
Inventory rating42.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length230 ft (70.1 m)
Longest span114 ft (34.7 m)
Deck width105 ft (31.9 m)
Roadway width80 ft (24.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic28,640 (1996)
Projected traffic34,700 by 2030
Trucks5%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed1.9 mi (3 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 proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Hill RD over I-475 built?

It was built in 1971, making it 54 years old in 2025. It was reconstructed in 2009.

What condition is Hill RD over I-475 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 July 2024.

How much traffic does Hill RD over I-475 carry?

About 28,640 vehicles per day (1996 count), of which roughly 5% are trucks.

How long is Hill RD over I-475?

The structure is 230 ft (70.1 m) long with a longest span of 114 ft (34.7 m) and a deck 105 ft wide.

Who owns Hill RD over I-475?

It is owned by the State Highway Agency.