US Bridges

Route 29 over C&o Canal N.W.

Fair

District of Columbia, District of Columbia · Ramp over C&o Canal · Structure no. 0032(TO KEY BR)

Built
1949
76 years old, rebuilt 1998
Condition
Fair
inspected January 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
94 ft
1 main span
Daily traffic
7,000
2018 count
Owner
State
State Highway Agency

About this bridge

Route 29 over C&o Canal N.W. is a steel stringer/multi-beam or girder carrying Route 29 over C&o Canal N.W. in District of Columbia, District of Columbia. It was built in 1949 and reconstructed in 1998, so it is 76 years old, older than the District of Columbia average of 63.7 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 7,000 vehicles a day, roughly 2% of them trucks, projected to reach 32,500 by 2026. The structure is 94 ft (28.7 m) long and 68 ft wide.

Location

Open in Google Maps
CarriesRoute 29
CrossesC&o Canal N.W.
LocationRamp over C&o Canal
RouteU.S. Route 29
CountyDistrict of Columbia
StateDistrict of Columbia
Coordinates38.90484, -77.07022
Functional classUrban Other Principal Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations on dry land well above flood water elevations
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating62.1 US tons
Inventory rating37.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length94 ft (28.7 m)
Longest span94 ft (28.7 m)
Deck width68 ft (20.7 m)
Roadway width57 ft (17.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,000 (2018)
Projected traffic32,500 by 2026
Trucks2%
Lanes on structure5
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 Route 29 over C&o Canal N.W. built?

It was built in 1949, making it 76 years old in 2025. It was reconstructed in 1998.

What condition is Route 29 over C&o Canal N.W. in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in January 2024.

How much traffic does Route 29 over C&o Canal N.W. carry?

About 7,000 vehicles per day (2018 count), of which roughly 2% are trucks.

How long is Route 29 over C&o Canal N.W.?

The structure is 94 ft (28.7 m) long with a longest span of 94 ft (28.7 m) and a deck 68 ft wide.

Who owns Route 29 over C&o Canal N.W.?

It is owned by the State Highway Agency.