US Bridges

Avery Road over Rock Creek

Good

Montgomery County, Maryland · 0.75 Miles North of Md 28 · Structure no. 200000M-0049010

Built
1994
31 years old
Condition
Good
inspected August 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
150 ft
2 main spans
Daily traffic
3,894
2022 count
Owner
County
County Highway Agency

About this bridge

Avery Road over Rock Creek is a steel continuous stringer/multi-beam or girder carrying Avery Road over Rock Creek 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 good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 3,894 vehicles a day, roughly 3% of them trucks, projected to reach 4,673 by 2042. The structure is 150 ft (45.7 m) long and 31 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesAvery Road
CrossesRock Creek
Location0.75 Miles North of Md 28
RouteCounty Highway 139
CountyMontgomery County
StateMaryland
Coordinates39.10161, -77.12493
Functional classUrban Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than 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 alignment6: Equal to present minimum criteria
Operating rating110.1 US tons
Inventory rating82.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length150 ft (45.7 m)
Longest span73 ft (22.3 m)
Deck width31 ft (9.5 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,894 (2022)
Projected traffic4,673 by 2042
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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$10,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Avery Road over Rock Creek built?

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

What condition is Avery Road over Rock Creek in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in August 2023.

How much traffic does Avery Road over Rock Creek carry?

About 3,894 vehicles per day (2022 count), of which roughly 3% are trucks.

How long is Avery Road over Rock Creek?

The structure is 150 ft (45.7 m) long with a longest span of 73 ft (22.3 m) and a deck 31 ft wide.

Who owns Avery Road over Rock Creek?

It is owned by the County Highway Agency.