US Bridges

SR 405 over Chillisquaque Creek

Good

Northumberland County, Pennsylvania · 3.5 MI S of Montandon · Structure no. 000000000029100

Built
1974
51 years old, rebuilt 2013
Condition
Good
inspected June 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
156 ft
2 main spans
Daily traffic
6,926
2024 count
Owner
State
State Highway Agency

About this bridge

SR 405 over Chillisquaque Creek is a prestressed concrete box beam or girders - multiple carrying SR 405 over Chillisquaque Creek in Northumberland County, Pennsylvania. It was built in 1974 and reconstructed in 2013, so it is 51 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 6,926 vehicles a day, roughly 10% of them trucks, projected to reach 6,327 by 2032. The structure is 156 ft (47.5 m) long and 52 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

Open in Google Maps
CarriesSR 405
CrossesChillisquaque Creek
Location3.5 MI S of Montandon
RouteState Highway 405
CountyNorthumberland County
StatePennsylvania
Coordinates40.94067, -76.85484
Functional classRural Major Collector

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.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating57.5 US tons
Inventory rating44 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2
Design loadHL 93
Structure length156 ft (47.5 m)
Longest span77 ft (23.5 m)
Deck width52 ft (15.9 m)
Roadway width48 ft (14.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,926 (2024)
Projected traffic6,327 by 2032
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$103,000
NavigationNo navigation control on waterway

Frequently asked questions

When was SR 405 over Chillisquaque Creek built?

It was built in 1974, making it 51 years old in 2025. It was reconstructed in 2013.

What condition is SR 405 over Chillisquaque 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 June 2023.

How much traffic does SR 405 over Chillisquaque Creek carry?

About 6,926 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is SR 405 over Chillisquaque Creek?

The structure is 156 ft (47.5 m) long with a longest span of 77 ft (23.5 m) and a deck 52 ft wide.

Who owns SR 405 over Chillisquaque Creek?

It is owned by the State Highway Agency.