US Bridges

NW 20th St. EB over Lwdd E-4 (el Rio) Canal

Good

Palm Beach County, Florida · 0.5MI W of N Dixie HWY · Structure no. 934420

Built
1964
61 years old
Condition
Good
inspected October 2024
Type
Slab
Prestressed Concrete
Length
60 ft
3 main spans
Daily traffic
9,050
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

NW 20th St. EB over Lwdd E-4 (el Rio) Canal is a prestressed concrete slab carrying NW 20th St. EB over Lwdd E-4 (el Rio) Canal in Palm Beach County, Florida. It was built in 1964, so it is 61 years old, older than the Florida average of 41.3 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 9,050 vehicles a day, roughly 8% of them trucks, projected to reach 15,702 by 2045. The structure is 60 ft (18.3 m) long and 36 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesNW 20th St. EB
CrossesLwdd E-4 (el Rio) Canal
Location0.5MI W of N Dixie HWY
RouteCity Street 0
CountyPalm Beach County
StateFlorida
Coordinates26.36958, -80.0947
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
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 alignment7: Better than present minimum criteria
Operating rating65.6 US tons
Inventory rating39.4 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans3
Design loadUnknown
Structure length60 ft (18.3 m)
Longest span20 ft (6.1 m)
Deck width36 ft (11 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,050 (2023)
Projected traffic15,702 by 2045
Trucks8%
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

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 NW 20th St. EB over Lwdd E-4 (el Rio) Canal built?

It was built in 1964, making it 61 years old in 2025.

What condition is NW 20th St. EB over Lwdd E-4 (el Rio) Canal 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 October 2024.

How much traffic does NW 20th St. EB over Lwdd E-4 (el Rio) Canal carry?

About 9,050 vehicles per day (2023 count), of which roughly 8% are trucks.

How long is NW 20th St. EB over Lwdd E-4 (el Rio) Canal?

The structure is 60 ft (18.3 m) long with a longest span of 20 ft (6.1 m) and a deck 36 ft wide.

Who owns NW 20th St. EB over Lwdd E-4 (el Rio) Canal?

It is owned by the City or Municipal Highway Agency.