US Bridges

Rock Ave over Midway Branch

Poor

Anne Arundel County, Maryland · .03 MI W Leonard Wood Ave · Structure no. DAPMDWMEA000007

Built
1984
41 years old
Condition
Poor
inspected April 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
52 ft
1 main span
Daily traffic
800
2017 count
Owner
Federal
Army

About this bridge

Rock Ave over Midway Branch is a steel stringer/multi-beam or girder carrying Rock Ave over Midway Branch in Anne Arundel County, Maryland. It was built in 1984, so it is 41 years old, younger than the Maryland average of 52.6 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 800 vehicles a day, roughly 10% of them trucks, projected to reach 1,500 by 2044. The structure is 52 ft (16 m) long and 36 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesRock Ave
CrossesMidway Branch
Location.03 MI W Leonard Wood Ave
CountyAnne Arundel County
StateMaryland
Coordinates39.0904, -76.73927
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating67.9 US tons
Inventory rating52.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length52 ft (16 m)
Longest span47 ft (14.3 m)
Deck width36 ft (10.9 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic800 (2017)
Projected traffic1,500 by 2044
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerArmy
Maintained byArmy
Historic statusNot eligible for the National Register of Historic Places
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$51,000 (2023 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Rock Ave over Midway Branch built?

It was built in 1984, making it 41 years old in 2025.

What condition is Rock Ave over Midway Branch in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in April 2023.

How much traffic does Rock Ave over Midway Branch carry?

About 800 vehicles per day (2017 count), of which roughly 10% are trucks.

How long is Rock Ave over Midway Branch?

The structure is 52 ft (16 m) long with a longest span of 47 ft (14.3 m) and a deck 36 ft wide.

Who owns Rock Ave over Midway Branch?

It is owned by the Army.