US Bridges

Filbert ST over Limestone Run

Fair

Northumberland County, Pennsylvania · Milton Boro · Structure no. 000000000029408

Built
1910
115 years old
Condition
Fair
inspected June 2023
Type
Arch - Deck
Concrete
Length
32 ft
1 main span
Daily traffic
4,900
2019 count
Owner
County
County Highway Agency

About this bridge

Filbert ST over Limestone Run is a concrete arch - deck carrying Filbert ST over Limestone Run in Northumberland County, Pennsylvania. It was built in 1910, so it is 115 years old, older than the Pennsylvania average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 4,900 vehicles a day, roughly 2% of them trucks, projected to reach 7,575 by 2039. The structure is 32 ft (9.8 m) long and 64 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesFilbert ST
CrossesLimestone Run
LocationMilton Boro
RouteCity Street 0
CountyNorthumberland County
StatePennsylvania
Coordinates41.01704, -76.8532
Functional classUrban Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
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
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating69 US tons
Inventory rating41 US tons

Structure

Structure typeArch - Deck
MaterialConcrete
DeckNot applicable
Main spans1
Design loadHS 20
Structure length32 ft (9.8 m)
Longest span32 ft (9.8 m)
Deck width64 ft (19.4 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,900 (2019)
Projected traffic7,575 by 2039
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusListed on the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$8.4 million
NavigationNo navigation control on waterway

Frequently asked questions

When was Filbert ST over Limestone Run built?

It was built in 1910, making it 115 years old in 2025.

What condition is Filbert ST over Limestone Run in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in June 2023.

How much traffic does Filbert ST over Limestone Run carry?

About 4,900 vehicles per day (2019 count), of which roughly 2% are trucks.

How long is Filbert ST over Limestone Run?

The structure is 32 ft (9.8 m) long with a longest span of 32 ft (9.8 m) and a deck 64 ft wide.

Who owns Filbert ST over Limestone Run?

It is owned by the County Highway Agency.