US Bridges

Airpark Road over Rock Creek Tributary

Fair

Montgomery County, Maryland · 0.6 Miles North of Md 115 · Structure no. 200000M-0238010

Built
1994
31 years old
Condition
Fair
inspected August 2024
Type
Arch - Deck
Steel
Length
33 ft
1 main span
Daily traffic
20,070
2024 count
Owner
County
County Highway Agency

About this bridge

Airpark Road over Rock Creek Tributary is a steel arch - deck carrying Airpark Road over Rock Creek Tributary in Montgomery County, Maryland. It was built in 1994, so it is 31 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 20,070 vehicles a day, roughly 5% of them trucks, projected to reach 21,418 by 2044. The structure is 33 ft (10 m) long. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesAirpark Road
CrossesRock Creek Tributary
Location0.6 Miles North of Md 115
RouteCounty Highway 3283
CountyMontgomery County
StateMaryland
Coordinates39.15453, -77.14192
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
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
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 rating78.5 US tons
Inventory rating47 US tons

Structure

Structure typeArch - Deck
MaterialSteel
DeckNot applicable
Main spans1
Design loadHS 20
Structure length33 ft (10 m)
Longest span32 ft (9.8 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20,070 (2024)
Projected traffic21,418 by 2044
Trucks5%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed3.7 mi (6 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 Airpark Road over Rock Creek Tributary built?

It was built in 1994, making it 31 years old in 2025.

What condition is Airpark Road over Rock Creek Tributary 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 Airpark Road over Rock Creek Tributary carry?

About 20,070 vehicles per day (2024 count), of which roughly 5% are trucks.

How long is Airpark Road over Rock Creek Tributary?

The structure is 33 ft (10 m) long with a longest span of 32 ft (9.8 m).

Who owns Airpark Road over Rock Creek Tributary?

It is owned by the County Highway Agency.