US Bridges

Hemphill RD over I-475

Poor

Genesee County, Michigan · @ S Flint City Lts · Structure no. 000000000002652

Built
1971
54 years old
Condition
Poor
inspected April 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
140 ft
2 main spans
Daily traffic
15,000
1988 count
Owner
State
State Highway Agency

About this bridge

Hemphill RD over I-475 is a steel continuous stringer/multi-beam or girder carrying Hemphill RD over I-475 in Genesee County, Michigan. It was built in 1971, 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 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 15,000 vehicles a day, roughly 3% of them trucks, projected to reach 17,250 by 2008. The structure is 140 ft (42.6 m) long and 66 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesHemphill RD
CrossesI-475
Location@ S Flint City Lts
RouteCity Street 2002
CountyGenesee County
StateMichigan
Coordinates42.98154, -83.68211
Functional classUrban Other Principal Arterial

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionApril 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 geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating80.7 US tons
Inventory rating48.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length140 ft (42.6 m)
Longest span70 ft (21.3 m)
Deck width66 ft (20.2 m)
Roadway width52 ft (15.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15,000 (1988)
Projected traffic17,250 by 2008
Trucks3%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
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 statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Hemphill RD over I-475 built?

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

What condition is Hemphill RD over I-475 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 April 2024.

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

About 15,000 vehicles per day (1988 count), of which roughly 3% are trucks.

How long is Hemphill RD over I-475?

The structure is 140 ft (42.6 m) long with a longest span of 70 ft (21.3 m) and a deck 66 ft wide.

Who owns Hemphill RD over I-475?

It is owned by the State Highway Agency.