US Bridges

Twp Rd. 420 over Boswell Run

Good

Pike County, Ohio · .5 MI W.SR.104 · Structure no. 6633617

Built
2001
24 years old
Condition
Good
inspected January 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
30 ft
1 main span
Daily traffic
271
2015 count
Owner
County
County Highway Agency

About this bridge

Twp Rd. 420 over Boswell Run is a steel stringer/multi-beam or girder carrying Twp Rd. 420 over Boswell Run in Pike County, Ohio. It was built in 2001, so it is 24 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 271 vehicles a day, roughly 7% of them trucks, projected to reach 376 by 2035. The structure is 30 ft (9.1 m) long and 24 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesTwp Rd. 420
CrossesBoswell Run
Location.5 MI W.SR.104
RouteCounty Highway T0420
CountyPike County
StateOhio
Coordinates39.08797, -83.0359
Functional classRural Local

Condition and inspection

Good

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

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating82.9 US tons
Inventory rating49.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckCorrugated steel
Main spans1
Design loadHS 20 + Mod
Structure length30 ft (9.1 m)
Longest span29 ft (8.8 m)
Deck width24 ft (7.3 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic271 (2015)
Projected traffic376 by 2035
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 Twp Rd. 420 over Boswell Run built?

It was built in 2001, making it 24 years old in 2025.

What condition is Twp Rd. 420 over Boswell Run 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 January 2024.

How much traffic does Twp Rd. 420 over Boswell Run carry?

About 271 vehicles per day (2015 count), of which roughly 7% are trucks.

How long is Twp Rd. 420 over Boswell Run?

The structure is 30 ft (9.1 m) long with a longest span of 29 ft (8.8 m) and a deck 24 ft wide.

Who owns Twp Rd. 420 over Boswell Run?

It is owned by the County Highway Agency.