US Bridges

Hill RD over I-75

Fair

Genesee County, Michigan · 1.2 MI SE of US-23 · Structure no. 000000000002632

Built
1962
63 years old, rebuilt 2002
Condition
Fair
inspected June 2024
Type
Box Beam or Girders - Single or Spread
Prestressed Concrete
Length
286 ft
4 main spans
Daily traffic
25,344
1996 count
Owner
State
State Highway Agency

About this bridge

Hill RD over I-75 is a prestressed concrete box beam or girders - single or spread carrying Hill RD over I-75 in Genesee County, Michigan. It was built in 1962 and reconstructed in 2002, so it is 63 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 25,344 vehicles a day, roughly 3% of them trucks, projected to reach 45,770 by 2016. The structure is 286 ft (87.3 m) long and 55 ft wide.

CarriesHill RD
CrossesI-75
Location1.2 MI SE of US-23
RouteCounty Highway 2002
Coordinates42.94419, -83.71294
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating85.3 US tons
Inventory rating30.8 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadH 20
Structure length286 ft (87.3 m)
Longest span98 ft (29.8 m)
Deck width55 ft (16.8 m)
Roadway width52 ft (15.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic25,344 (1996)
Projected traffic45,770 by 2016
Trucks3%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
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-75 built?

It was built in 1962, making it 63 years old in 2025. It was reconstructed in 2002.

What condition is Hill RD over I-75 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 2024.

How much traffic does Hill RD over I-75 carry?

About 25,344 vehicles per day (1996 count), of which roughly 3% are trucks.

How long is Hill RD over I-75?

The structure is 286 ft (87.3 m) long with a longest span of 98 ft (29.8 m) and a deck 55 ft wide.

Who owns Hill RD over I-75?

It is owned by the State Highway Agency.