US Bridges

Muncaster Road over Rock Creek

Good

Montgomery County, Maryland · 1 Mile North of Md 115 · Structure no. 200000M-0058010

Built
2006
19 years old
Condition
Good
inspected March 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
64 ft
1 main span
Daily traffic
7,803
2021 count
Owner
County
County Highway Agency

About this bridge

Muncaster Road over Rock Creek is a steel stringer/multi-beam or girder carrying Muncaster Road over Rock Creek in Montgomery County, Maryland. It was built in 2006, so it is 19 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 7,803 vehicles a day, roughly 5% of them trucks, projected to reach 10,830 by 2043. The structure is 64 ft (19.4 m) long and 37 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesMuncaster Road
CrossesRock Creek
Location1 Mile North of Md 115
RouteCounty Highway 62
CountyMontgomery County
StateMaryland
Coordinates39.1542, -77.1318
Functional classRural Minor Collector

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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
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 rating75 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length64 ft (19.4 m)
Longest span58 ft (17.7 m)
Deck width37 ft (11.2 m)
Roadway width33 ft (10.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,803 (2021)
Projected traffic10,830 by 2043
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 proposedOther structural work, including hydraulic replacements
Estimated improvement cost$8,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Muncaster Road over Rock Creek built?

It was built in 2006, making it 19 years old in 2025.

What condition is Muncaster 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 March 2023.

How much traffic does Muncaster Road over Rock Creek carry?

About 7,803 vehicles per day (2021 count), of which roughly 5% are trucks.

How long is Muncaster Road over Rock Creek?

The structure is 64 ft (19.4 m) long with a longest span of 58 ft (17.7 m) and a deck 37 ft wide.

Who owns Muncaster Road over Rock Creek?

It is owned by the County Highway Agency.