US Bridges

Ramp Wn to US29 NB over Ramp NB to Briggs Chaney

Good

Montgomery County, Maryland · 0.8 MI S Briggs Chaney RD · Structure no. 300000M-V166020

Built
2011
14 years old
Condition
Good
inspected August 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
221 ft
1 main span
Daily traffic
309
2019 count
Owner
Toll Authority
State Toll Authority

About this bridge

Ramp Wn to US29 NB over Ramp NB to Briggs Chaney is a steel stringer/multi-beam or girder carrying Ramp Wn to US29 NB over Ramp NB to Briggs Chaney in Montgomery County, Maryland. It was built in 2011, so it is 14 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 309 vehicles a day, roughly 2% of them trucks, projected to reach 605 by 2041. The structure is 221 ft (67.4 m) long and 35 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
CarriesRamp Wn to US29 NB
CrossesRamp NB to Briggs Chaney
Location0.8 MI S Briggs Chaney RD
RouteState Highway 0
CountyMontgomery County
StateMaryland
Coordinates39.0788, -76.95073
Functional classUrban Principal Arterial - Other Freeway or Expressway

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.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating72 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length221 ft (67.4 m)
Longest span214 ft (65.2 m)
Deck width35 ft (10.7 m)
Roadway width31 ft (9.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic309 (2019)
Projected traffic605 by 2041
Trucks2%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed98.8 mi (159 km)
TollOn a toll road
National Highway SystemYes

Ownership and planned work

OwnerState Toll Authority
Maintained byState Toll Authority
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Ramp Wn to US29 NB over Ramp NB to Briggs Chaney built?

It was built in 2011, making it 14 years old in 2025.

What condition is Ramp Wn to US29 NB over Ramp NB to Briggs Chaney 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 Ramp Wn to US29 NB over Ramp NB to Briggs Chaney carry?

About 309 vehicles per day (2019 count), of which roughly 2% are trucks.

How long is Ramp Wn to US29 NB over Ramp NB to Briggs Chaney?

The structure is 221 ft (67.4 m) long with a longest span of 214 ft (65.2 m) and a deck 35 ft wide.

Who owns Ramp Wn to US29 NB over Ramp NB to Briggs Chaney?

It is owned by the State Toll Authority.