US Bridges

Thompson RD over US-23

Poor

Genesee County, Michigan · 3.2 MI N of Fenton · Structure no. 000000000002479

Built
1957
68 years old
Condition
Poor
inspected October 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
224 ft
4 main spans
Daily traffic
9,650
1996 count
Owner
State
State Highway Agency

About this bridge

Thompson RD over US-23 is a steel stringer/multi-beam or girder carrying Thompson RD over US-23 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 9,650 vehicles a day, roughly 5% of them trucks, projected to reach 17,430 by 2016. The structure is 224 ft (68.4 m) long and 33 ft wide.

CarriesThompson RD
CrossesUS-23
Location3.2 MI N of Fenton
RouteCounty Highway 2541
Coordinates42.86302, -83.73968
Functional classUrban Minor 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.
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 inspectionOctober 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 rating57.9 US tons
Inventory rating34.6 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans4
Design loadH 15
Structure length224 ft (68.4 m)
Longest span59 ft (18.1 m)
Deck width33 ft (10.1 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,650 (1996)
Projected traffic17,430 by 2016
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$167,000
NavigationNot applicable (no waterway)

Frequently asked questions

When was Thompson RD over US-23 built?

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

What condition is Thompson RD over US-23 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 October 2024.

How much traffic does Thompson RD over US-23 carry?

About 9,650 vehicles per day (1996 count), of which roughly 5% are trucks.

How long is Thompson RD over US-23?

The structure is 224 ft (68.4 m) long with a longest span of 59 ft (18.1 m) and a deck 33 ft wide.

Who owns Thompson RD over US-23?

It is owned by the State Highway Agency.