US Bridges

Sbl N. Sycamore ST over Four Mile Run

Good

Arlington County, Virginia · 0.3 SFR66 /0 .7TOWIL Blvd · Structure no. 000000000000022

Built
1971
54 years old
Condition
Good
inspected March 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
64 ft
1 main span
Daily traffic
7,944
2020 count
Owner
County
County Highway Agency

About this bridge

Sbl N. Sycamore ST over Four Mile Run is a steel stringer/multi-beam or girder carrying Sbl N. Sycamore ST over Four Mile Run in Arlington County, Virginia. It was built in 1971, so it is 54 years old, older than the Virginia average of 50.7 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 7,944 vehicles a day, projected to reach 11,122 by 2040. The structure is 64 ft (19.5 m) long and 37 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesSbl N. Sycamore ST
CrossesFour Mile Run
Location0.3 SFR66 /0 .7TOWIL Blvd
RouteCounty Highway 0
CountyArlington County
StateVirginia
Coordinates38.88318, -77.15538
Functional classUrban Minor Arterial

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 protection7 GoodSome minor problems.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation7: Better than present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating75.3 US tons
Inventory rating58.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length64 ft (19.5 m)
Longest span64 ft (19.5 m)
Deck width37 ft (11.3 m)
Roadway width27 ft (8.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,944 (2020)
Projected traffic11,122 by 2040
Trucks0%
Lanes on structure2
Traffic directionOne-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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$2.5 million
NavigationNo navigation control on waterway

Frequently asked questions

When was Sbl N. Sycamore ST over Four Mile Run built?

It was built in 1971, making it 54 years old in 2025.

What condition is Sbl N. Sycamore ST over Four Mile Run 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 Sbl N. Sycamore ST over Four Mile Run carry?

About 7,944 vehicles per day (2020 count).

How long is Sbl N. Sycamore ST over Four Mile Run?

The structure is 64 ft (19.5 m) long with a longest span of 64 ft (19.5 m) and a deck 37 ft wide.

Who owns Sbl N. Sycamore ST over Four Mile Run?

It is owned by the County Highway Agency.