US Bridges

Needwood Road over Rock Creek

Fair

Montgomery County, Maryland · .6 MI W of Muncaster Mill · Structure no. 200000M-0055010

Built
1965
60 years old
Condition
Fair
inspected July 2023
Type
Slab
Concrete
Length
33 ft
1 main span
Daily traffic
6,446
2023 count
Owner
County
County Highway Agency

About this bridge

Needwood Road over Rock Creek is a concrete slab carrying Needwood Road over Rock Creek in Montgomery County, 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 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 6,446 vehicles a day, roughly 3% of them trucks, projected to reach 8,286 by 2043. The structure is 33 ft (10.1 m) long and 48 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesNeedwood Road
CrossesRock Creek
Location.6 MI W of Muncaster Mill
RouteCounty Highway 138
CountyMontgomery County
StateMaryland
Coordinates39.12765, -77.12989
Functional classRural Minor Collector

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating70 US tons
Inventory rating41.4 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length33 ft (10.1 m)
Longest span30 ft (9.1 m)
Deck width48 ft (14.6 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,446 (2023)
Projected traffic8,286 by 2043
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
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 Needwood Road over Rock Creek built?

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

What condition is Needwood Road over 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 July 2023.

How much traffic does Needwood Road over Rock Creek carry?

About 6,446 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is Needwood Road over Rock Creek?

The structure is 33 ft (10.1 m) long with a longest span of 30 ft (9.1 m) and a deck 48 ft wide.

Who owns Needwood Road over Rock Creek?

It is owned by the County Highway Agency.