US Bridges

Carnation Drive over Watts Branch Tributary

Good

Montgomery County, Maryland · 1.25 Miles North of Md 28 · Structure no. 200000M-R-10030

Built
1969
56 years old
Condition
Good
inspected March 2024
Type
Culvert
Steel
Length
27 ft
Daily traffic
490
2024 count
Owner
City
City or Municipal Highway Agency

About this bridge

Carnation Drive over Watts Branch Tributary is a steel culvert carrying Carnation Drive over Watts Branch Tributary in Montgomery County, Maryland. It was built in 1969, so it is 56 years old, older 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 490 vehicles a day, roughly 5% of them trucks, projected to reach 655 by 2044. The structure is 27 ft (8.1 m) long. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
CarriesCarnation Drive
CrossesWatts Branch Tributary
Location1.25 Miles North of Md 28
RouteCity Street 555
CountyMontgomery County
StateMaryland
Coordinates39.10143, -77.17406
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
Channel and channel protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating110.1 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans0
Design loadHS 20
Structure length27 ft (8.1 m)
Longest span12 ft (3.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic490 (2024)
Projected traffic655 by 2044
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed98.8 mi (159 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Carnation Drive over Watts Branch Tributary built?

It was built in 1969, making it 56 years old in 2025.

What condition is Carnation Drive over Watts 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 March 2024.

How much traffic does Carnation Drive over Watts Branch Tributary carry?

About 490 vehicles per day (2024 count), of which roughly 5% are trucks.

How long is Carnation Drive over Watts Branch Tributary?

The structure is 27 ft (8.1 m) long with a longest span of 12 ft (3.7 m).

Who owns Carnation Drive over Watts Branch Tributary?

It is owned by the City or Municipal Highway Agency.