US Bridges

Mcneilly Road over Saw Mill Run

Fair

Allegheny County, Pennsylvania · SW09 Saw Mill Run No. 9 · Structure no. 000000000002511

Built
1932
93 years old, rebuilt 2018
Condition
Fair
inspected November 2023
Type
Frame
Concrete
Length
40 ft
1 main span
Daily traffic
15,683
2019 count
Owner
County
County Highway Agency

About this bridge

Mcneilly Road over Saw Mill Run is a concrete frame carrying Mcneilly Road over Saw Mill Run in Allegheny County, Pennsylvania. It was built in 1932 and reconstructed in 2018, so it is 93 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 6 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 15,683 vehicles a day, roughly 3% of them trucks, projected to reach 18,211 by 2039. The structure is 40 ft (12.2 m) long and 31 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesMcneilly Road
CrossesSaw Mill Run
LocationSW09 Saw Mill Run No. 9
RouteCounty Highway 0
CountyAllegheny County
StatePennsylvania
Coordinates40.37808, -80.00404
Functional classUrban Minor Arterial

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation6: Equal to present minimum criteria
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 rating45 US tons
Inventory rating27 US tons

Structure

Structure typeFrame
MaterialConcrete
DeckNot applicable
Main spans1
Design loadUnknown
Structure length40 ft (12.2 m)
Longest span40 ft (12.2 m)
Deck width31 ft (9.6 m)
Roadway width23 ft (7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15,683 (2019)
Projected traffic18,211 by 2039
Trucks3%
Lanes on structure2
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

OwnerCounty Highway Agency
Maintained byCounty 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$52,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Mcneilly Road over Saw Mill Run built?

It was built in 1932, making it 93 years old in 2025. It was reconstructed in 2018.

What condition is Mcneilly Road 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 November 2023.

How much traffic does Mcneilly Road over Saw Mill Run carry?

About 15,683 vehicles per day (2019 count), of which roughly 3% are trucks.

How long is Mcneilly Road over Saw Mill Run?

The structure is 40 ft (12.2 m) long with a longest span of 40 ft (12.2 m) and a deck 31 ft wide.

Who owns Mcneilly Road over Saw Mill Run?

It is owned by the County Highway Agency.