US Bridges

Knight Road over Green Lane Reservoir

Fair

Montgomery County, Pennsylvania · 0.7 MI E SR 0663 2916-J2 · Structure no. 000000000027936

Built
1956
69 years old, rebuilt 1998
Condition
Fair
inspected August 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete Continuous
Length
391 ft
6 main spans
Daily traffic
2,769
2019 count
Owner
County
County Highway Agency

About this bridge

Knight Road over Green Lane Reservoir is a prestressed concrete continuous box beam or girders - multiple carrying Knight Road over Green Lane Reservoir in Montgomery County, Pennsylvania. It was built in 1956 and reconstructed in 1998, so it is 69 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 2,769 vehicles a day, roughly 34% of them trucks, projected to reach 2,201 by 2018. The structure is 391 ft (119.2 m) long and 41 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesKnight Road
CrossesGreen Lane Reservoir
Location0.7 MI E SR 0663 2916-J2
RouteCounty Highway 663
CountyMontgomery County
StatePennsylvania
Coordinates40.36641, -75.51
Functional classRural Major 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating65 US tons
Inventory rating39 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans6
Design loadHS 25 or greater
Structure length391 ft (119.2 m)
Longest span72 ft (21.9 m)
Deck width41 ft (12.4 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,769 (2019)
Projected traffic2,201 by 2018
Trucks34%
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 proposedNone recorded
Estimated improvement cost$879,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Knight Road over Green Lane Reservoir built?

It was built in 1956, making it 69 years old in 2025. It was reconstructed in 1998.

What condition is Knight Road over Green Lane Reservoir 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 August 2023.

How much traffic does Knight Road over Green Lane Reservoir carry?

About 2,769 vehicles per day (2019 count), of which roughly 34% are trucks.

How long is Knight Road over Green Lane Reservoir?

The structure is 391 ft (119.2 m) long with a longest span of 72 ft (21.9 m) and a deck 41 ft wide.

Who owns Knight Road over Green Lane Reservoir?

It is owned by the County Highway Agency.