US Bridges

Brown RD over Big Sewickley Creek EB

Fair

Allegheny County, Pennsylvania · SE01 S/Big Sew Crk RD · Structure no. 000000000002728

Built
1891
134 years old
Condition
Fair
inspected March 2023
Type
Arch - Deck
Masonry
Length
26 ft
1 main span
Daily traffic
118
2023 count
Owner
County
County Highway Agency

About this bridge

Brown RD over Big Sewickley Creek EB is a masonry arch - deck carrying Brown RD over Big Sewickley Creek EB in Allegheny County, Pennsylvania. It was built in 1891, so it is 134 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 118 vehicles a day, roughly 1% of them trucks, projected to reach 148 by 2043. The structure is 26 ft (7.9 m) long and 25 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesBrown RD
CrossesBig Sewickley Creek EB
LocationSE01 S/Big Sew Crk RD
RouteCounty Highway 0
CountyAllegheny County
StatePennsylvania
Coordinates40.60818, -80.135
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
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionMarch 2023
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 geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating54 US tons
Inventory rating36 US tons

Structure

Structure typeArch - Deck
MaterialMasonry
DeckNot applicable
Main spans1
Design loadUnknown
Structure length26 ft (7.9 m)
Longest span26 ft (7.9 m)
Deck width25 ft (7.6 m)
Roadway width20 ft (6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic118 (2023)
Projected traffic148 by 2043
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 proposedDeck rehabilitation with only incidental widening
Estimated improvement cost$65,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Brown RD over Big Sewickley Creek EB built?

It was built in 1891, making it 134 years old in 2025.

What condition is Brown RD over Big Sewickley Creek EB 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 March 2023.

How much traffic does Brown RD over Big Sewickley Creek EB carry?

About 118 vehicles per day (2023 count), of which roughly 1% are trucks.

How long is Brown RD over Big Sewickley Creek EB?

The structure is 26 ft (7.9 m) long with a longest span of 26 ft (7.9 m) and a deck 25 ft wide.

Who owns Brown RD over Big Sewickley Creek EB?

It is owned by the County Highway Agency.