US Bridges

SR 405 over Limestone Run

Good

Northumberland County, Pennsylvania · Boro of Milton · Structure no. 000000000029104

Built
1978
47 years old
Condition
Good
inspected October 2023
Type
Culvert
Concrete
Length
20 ft
1 main span
Daily traffic
10,643
2024 count
Owner
State
State Highway Agency

About this bridge

SR 405 over Limestone Run is a concrete culvert carrying SR 405 over Limestone Run in Northumberland County, Pennsylvania. It was built in 1978, so it is 47 years old, younger than the Pennsylvania average of 54.8 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 10,643 vehicles a day, roughly 4% of them trucks, projected to reach 15,583 by 2032. The structure is 20 ft (6.1 m) long. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesSR 405
CrossesLimestone Run
LocationBoro of Milton
RouteState Highway 405
CountyNorthumberland County
StatePennsylvania
Coordinates41.01723, -76.85459
Functional classUrban Minor Arterial

Condition and inspection

Good

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

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert7 GoodSome minor problems.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60 US tons
Inventory rating36 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans1
Design loadHS 20
Structure length20 ft (6.1 m)
Longest span20 ft (6.1 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,643 (2024)
Projected traffic15,583 by 2032
Trucks4%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byTown or Township 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 SR 405 over Limestone Run built?

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

What condition is SR 405 over Limestone 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 October 2023.

How much traffic does SR 405 over Limestone Run carry?

About 10,643 vehicles per day (2024 count), of which roughly 4% are trucks.

How long is SR 405 over Limestone Run?

The structure is 20 ft (6.1 m) long with a longest span of 20 ft (6.1 m).

Who owns SR 405 over Limestone Run?

It is owned by the State Highway Agency and maintained by the Town or Township Highway Agency.