US Bridges

Arch Street over Saw Mill Run

Fair

Montgomery County, Pennsylvania · 900 SE of 202NB 3367-F2 · Structure no. 000000000028222

Built
1900
125 years old
Condition
Fair
inspected April 2024
Type
Arch - Deck
Masonry
Length
25 ft
1 main span
Daily traffic
5,600
2015 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

Arch Street over Saw Mill Run is a masonry arch - deck carrying Arch Street over Saw Mill Run in Montgomery County, Pennsylvania. It was built in 1900, so it is 125 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 5,600 vehicles a day, roughly 2% of them trucks, projected to reach 6,000 by 2035. The structure is 25 ft (7.6 m) long and 51 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesArch Street
CrossesSaw Mill Run
Location900 SE of 202NB 3367-F2
RouteCity Street 0
CountyMontgomery County
StatePennsylvania
Coordinates40.11574, -75.33724
Functional classUrban Collector

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 protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
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 rating66 US tons
Inventory rating39 US tons

Structure

Structure typeArch - Deck
MaterialMasonry
DeckNot applicable
Main spans1
Design loadUnknown
Structure length25 ft (7.6 m)
Longest span24 ft (7.3 m)
Deck width51 ft (15.4 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,600 (2015)
Projected traffic6,000 by 2035
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

OwnerTown or Township Highway Agency
Maintained byTown or Township 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$203,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Arch Street over Saw Mill Run built?

It was built in 1900, making it 125 years old in 2025.

What condition is Arch Street over Saw Mill 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 April 2024.

How much traffic does Arch Street over Saw Mill Run carry?

About 5,600 vehicles per day (2015 count), of which roughly 2% are trucks.

How long is Arch Street over Saw Mill Run?

The structure is 25 ft (7.6 m) long with a longest span of 24 ft (7.3 m) and a deck 51 ft wide.

Who owns Arch Street over Saw Mill Run?

It is owned by the Town or Township Highway Agency.