US Bridges

Logan Drive over Rock Run

Fair

Montgomery County, Maryland · 1.0 Mile South of Md 190 · Structure no. 200000M-0391020

Built
1972
53 years old
Condition
Fair
inspected November 2023
Type
Culvert
Concrete
Length
23 ft
Daily traffic
1,657
2021 count
Owner
County
County Highway Agency

About this bridge

Logan Drive over Rock Run is a concrete culvert carrying Logan Drive over Rock Run in Montgomery County, Maryland. It was built in 1972, so it is 53 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 6 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 1,657 vehicles a day, roughly 5% of them trucks, projected to reach 2,023 by 2041. The structure is 23 ft (7 m) long. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesLogan Drive
CrossesRock Run
Location1.0 Mile South of Md 190
RouteCounty Highway 3183
CountyMontgomery County
StateMaryland
Coordinates39.00782, -77.21209
Functional classRural Local

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 protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating36 US tons
Inventory rating36 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans0
Design loadUnknown
Structure length23 ft (7 m)
Longest span11 ft (3.4 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,657 (2021)
Projected traffic2,023 by 2041
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 Logan Drive over Rock Run built?

It was built in 1972, making it 53 years old in 2025.

What condition is Logan Drive over Rock Run 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 November 2023.

How much traffic does Logan Drive over Rock Run carry?

About 1,657 vehicles per day (2021 count), of which roughly 5% are trucks.

How long is Logan Drive over Rock Run?

The structure is 23 ft (7 m) long with a longest span of 11 ft (3.4 m).

Who owns Logan Drive over Rock Run?

It is owned by the County Highway Agency.