US Bridges

Diamondback Drive over Muddy Branch Tributary

Good

Montgomery County, Maryland · 0.68 Miles North of Md 28 · Structure no. 200000M-0524010

Built
1995
30 years old
Condition
Good
inspected February 2023
Type
Arch - Deck
Steel
Length
32 ft
1 main span
Daily traffic
3,932
2019 count
Owner
County
County Highway Agency

About this bridge

Diamondback Drive over Muddy Branch Tributary is a steel arch - deck carrying Diamondback Drive over Muddy Branch Tributary in Montgomery County, Maryland. It was built in 1995, so it is 30 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 3,932 vehicles a day, roughly 2% of them trucks, projected to reach 4,344 by 2041. The structure is 32 ft (9.8 m) long. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesDiamondback Drive
CrossesMuddy Branch Tributary
Location0.68 Miles North of Md 28
RouteCounty Highway 6166
CountyMontgomery County
StateMaryland
Coordinates36.18796, -77.34336
Functional classUrban Collector

Condition and inspection

Good

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

ComponentRatingMeaning
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionFebruary 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
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating110.1 US tons
Inventory rating110.1 US tons

Structure

Structure typeArch - Deck
MaterialSteel
DeckNot applicable
Main spans1
Design loadUnknown
Structure length32 ft (9.8 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 traffic3,932 (2019)
Projected traffic4,344 by 2041
Trucks2%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 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 Diamondback Drive over Muddy Branch Tributary built?

It was built in 1995, making it 30 years old in 2025.

What condition is Diamondback Drive over Muddy Branch Tributary 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 February 2023.

How much traffic does Diamondback Drive over Muddy Branch Tributary carry?

About 3,932 vehicles per day (2019 count), of which roughly 2% are trucks.

How long is Diamondback Drive over Muddy Branch Tributary?

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

Who owns Diamondback Drive over Muddy Branch Tributary?

It is owned by the County Highway Agency.