US Bridges

Irwin Simpson Road over Simpson Creek

Good

Warren County, Ohio · 0.32 MI W of CR 15 · Structure no. 8332258

Built
1978
47 years old
Condition
Good
inspected December 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
26 ft
1 main span
Daily traffic
7,264
2015 count
Owner
County
County Highway Agency

About this bridge

Irwin Simpson Road over Simpson Creek is a prestressed concrete box beam or girders - multiple carrying Irwin Simpson Road over Simpson Creek in Warren County, Ohio. It was built in 1978, so it is 47 years old, younger than the Ohio average of 47.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 7,264 vehicles a day, roughly 5% of them trucks, projected to reach 10,082 by 2035. The structure is 26 ft (7.9 m) long and 28 ft wide. If it were closed, the detour would be 5 mi (8 km).

CarriesIrwin Simpson Road
CrossesSimpson Creek
Location0.32 MI W of CR 15
RouteCounty Highway T0055
StateOhio
Coordinates39.31293, -84.28958
Functional classUrban Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation7: Better than present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating100 US tons
Inventory rating60.7 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length26 ft (7.9 m)
Longest span23 ft (7 m)
Deck width28 ft (8.5 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,264 (2015)
Projected traffic10,082 by 2035
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Irwin Simpson Road over Simpson Creek built?

It was built in 1978, making it 47 years old in 2025.

What condition is Irwin Simpson Road over Simpson Creek in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in December 2024.

How much traffic does Irwin Simpson Road over Simpson Creek carry?

About 7,264 vehicles per day (2015 count), of which roughly 5% are trucks.

How long is Irwin Simpson Road over Simpson Creek?

The structure is 26 ft (7.9 m) long with a longest span of 23 ft (7 m) and a deck 28 ft wide.

Who owns Irwin Simpson Road over Simpson Creek?

It is owned by the County Highway Agency.