US Bridges

Md 586 over Branch of Rock Creek

Fair

Montgomery County, Maryland · 0.06 M E of Andrew Street · Structure no. 100000150165030

Built
1956
69 years old
Condition
Fair
inspected August 2024
Type
Culvert
Steel
Length
21 ft
1 main span
Daily traffic
37,752
2009 count
Owner
State
State Highway Agency

About this bridge

Md 586 over Branch of Rock Creek is a steel culvert carrying Md 586 over Branch of Rock Creek in Montgomery County, Maryland. It was built in 1956, so it is 69 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 37,752 vehicles a day, projected to reach 47,540 by 2026. The structure is 21 ft (6.4 m) long. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesMd 586
CrossesBranch of Rock Creek
Location0.06 M E of Andrew Street
RouteState Highway 586
CountyMontgomery County
StateMaryland
Coordinates39.04946, -77.07076
Functional classUrban Other Principal 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
Channel and channel protection7 GoodSome minor problems.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating110.1 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans1
Design loadHS 20
Structure length21 ft (6.4 m)
Longest span21 ft (6.4 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic37,752 (2009)
Projected traffic47,540 by 2026
Trucks—
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

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 586 over Branch of Rock Creek built?

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

What condition is Md 586 over Branch of Rock Creek 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 586 over Branch of Rock Creek carry?

About 37,752 vehicles per day (2009 count).

How long is Md 586 over Branch of Rock Creek?

The structure is 21 ft (6.4 m) long with a longest span of 21 ft (6.4 m).

Who owns Md 586 over Branch of Rock Creek?

It is owned by the State Highway Agency.