US Bridges

Carpenter RD over I-75

Poor

Genesee County, Michigan · 5.4 MI N of M-21 · Structure no. 000000000002506

Built
1957
68 years old
Condition
Poor
inspected January 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
202 ft
4 main spans
Daily traffic
2,967
1996 count
Owner
State
State Highway Agency

About this bridge

Carpenter RD over I-75 is a steel stringer/multi-beam or girder carrying Carpenter RD over I-75 in Genesee County, Michigan. It was built in 1957, so it is 68 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 2,967 vehicles a day, roughly 3% of them trucks, projected to reach 5,300 by 2016. The structure is 202 ft (61.6 m) long and 33 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesCarpenter RD
CrossesI-75
Location5.4 MI N of M-21
RouteCounty Highway 2002
CountyGenesee County
StateMichigan
Coordinates43.07524, -83.76258
Functional classUrban 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.
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 inspectionJanuary 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 geometry3: Basically intolerable, requiring high priority of corrective action
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60.4 US tons
Inventory rating32.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans4
Design loadH 15
Structure length202 ft (61.6 m)
Longest span70 ft (21.2 m)
Deck width33 ft (10.2 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,967 (1996)
Projected traffic5,300 by 2016
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 statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Carpenter RD over I-75 built?

It was built in 1957, making it 68 years old in 2025.

What condition is Carpenter 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 January 2024.

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

About 2,967 vehicles per day (1996 count), of which roughly 3% are trucks.

How long is Carpenter RD over I-75?

The structure is 202 ft (61.6 m) long with a longest span of 70 ft (21.2 m) and a deck 33 ft wide.

Who owns Carpenter RD over I-75?

It is owned by the State Highway Agency.