US Bridges

Md 146 over Loch Raven Reservoir

Fair

Baltimore County, Maryland · 0.48 M N of Old Bosley RD · Structure no. 100000030298010

Built
1976
49 years old
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
1,157 ft
6 main spans
Daily traffic
20,421
2023 count
Owner
State
State Highway Agency

About this bridge

Md 146 over Loch Raven Reservoir is a steel continuous stringer/multi-beam or girder carrying Md 146 over Loch Raven Reservoir in Baltimore County, Maryland. It was built in 1976, so it is 49 years old, younger 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 20,421 vehicles a day, roughly 8% of them trucks, projected to reach 20,458 by 2043. The structure is 1,157 ft (352.7 m) long and 73 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

No coordinates are recorded for this structure.

CarriesMd 146
CrossesLoch Raven Reservoir
Location0.48 M N of Old Bosley RD
RouteState Highway 146
CountyBaltimore County
StateMaryland
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 inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
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 rating65 US tons
Inventory rating39 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans6
Design loadHS 20 + Mod
Structure length1,157 ft (352.7 m)
Longest span230 ft (70.1 m)
Deck width73 ft (22.1 m)
Roadway width56 ft (17.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20,421 (2023)
Projected traffic20,458 by 2043
Trucks8%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Md 146 over Loch Raven Reservoir built?

It was built in 1976, making it 49 years old in 2025.

What condition is Md 146 over Loch Raven 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 2024.

How much traffic does Md 146 over Loch Raven Reservoir carry?

About 20,421 vehicles per day (2023 count), of which roughly 8% are trucks.

How long is Md 146 over Loch Raven Reservoir?

The structure is 1,157 ft (352.7 m) long with a longest span of 230 ft (70.1 m) and a deck 73 ft wide.

Who owns Md 146 over Loch Raven Reservoir?

It is owned by the State Highway Agency.