US Bridges

Northern Parkway over Herring Run Perring Pkw

Fair

Baltimore city, Maryland · 0.4 MI E Loch Raven Blvd · Structure no. 200000BC3201010

Built
1957
68 years old, rebuilt 1989
Condition
Fair
inspected January 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
484 ft
5 main spans
Daily traffic
1,171
2016 count
Owner
City
City or Municipal Highway Agency

About this bridge

Northern Parkway over Herring Run Perring Pkw is a steel stringer/multi-beam or girder carrying Northern Parkway over Herring Run Perring Pkw in Baltimore city, Maryland. It was built in 1957 and reconstructed in 1989, so it is 68 years old, older than the Maryland average of 52.6 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 1,171 vehicles a day, roughly 5% of them trucks, projected to reach 1,460 by 2036. The structure is 484 ft (147.5 m) long and 68 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesNorthern Parkway
CrossesHerring Run Perring Pkw
Location0.4 MI E Loch Raven Blvd
RouteCity Street 1022
CountyBaltimore city
StateMaryland
Coordinates39.36853, -76.57484
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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJanuary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating93 US tons
Inventory rating56 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20
Structure length484 ft (147.5 m)
Longest span112 ft (34.1 m)
Deck width68 ft (20.7 m)
Roadway width56 ft (17.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,171 (2016)
Projected traffic1,460 by 2036
Trucks5%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway and waterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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$288,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Northern Parkway over Herring Run Perring Pkw built?

It was built in 1957, making it 68 years old in 2025. It was reconstructed in 1989.

What condition is Northern Parkway over Herring Run Perring Pkw 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 January 2023.

How much traffic does Northern Parkway over Herring Run Perring Pkw carry?

About 1,171 vehicles per day (2016 count), of which roughly 5% are trucks.

How long is Northern Parkway over Herring Run Perring Pkw?

The structure is 484 ft (147.5 m) long with a longest span of 112 ft (34.1 m) and a deck 68 ft wide.

Who owns Northern Parkway over Herring Run Perring Pkw?

It is owned by the City or Municipal Highway Agency.