US Bridges

Northern Parkway over Powder Mill Run

Good

Baltimore city, Maryland · Northern Pkwy/Powder Mill · Structure no. 200000BC2256020

Built
1965
60 years old
Condition
Good
inspected December 2023
Type
Culvert
Concrete
Length
41 ft
2 main spans
Daily traffic
31,395
2007 count
Owner
City
City or Municipal Highway Agency

About this bridge

Northern Parkway over Powder Mill Run is a concrete culvert carrying Northern Parkway over Powder Mill Run in Baltimore city, Maryland. It was built in 1965, so it is 60 years old, older than the Maryland average of 52.6 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 31,395 vehicles a day, roughly 5% of them trucks, projected to reach 39,060 by 2027. The structure is 41 ft (12.5 m) long and 15 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesNorthern Parkway
CrossesPowder Mill Run
LocationNorthern Pkwy/Powder Mill
RouteCity Street 1022
Coordinates39.33706, -76.70946
Functional classUrban Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating36 US tons
Inventory rating36 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadUnknown
Structure length41 ft (12.5 m)
Longest span14 ft (4.3 m)
Deck width15 ft (4.7 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic31,395 (2007)
Projected traffic39,060 by 2027
Trucks5%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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 proposedOther structural work, including hydraulic replacements
Estimated improvement cost$26,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Northern Parkway over Powder Mill Run built?

It was built in 1965, making it 60 years old in 2025.

What condition is Northern Parkway over Powder Mill Run in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in December 2023.

How much traffic does Northern Parkway over Powder Mill Run carry?

About 31,395 vehicles per day (2007 count), of which roughly 5% are trucks.

How long is Northern Parkway over Powder Mill Run?

The structure is 41 ft (12.5 m) long with a longest span of 14 ft (4.3 m) and a deck 15 ft wide.

Who owns Northern Parkway over Powder Mill Run?

It is owned by the City or Municipal Highway Agency.