US Bridges

West Robbins Rd. over Gravelly Ditch

Good

Sussex County, Delaware · N.W. of Georgetown · Structure no. 3631 579

Built
2023
2 years old
Condition
Good
inspected June 2023
Type
Culvert
Concrete
Length
25 ft
1 main span
Daily traffic
518
2022 count
Owner
State
State Highway Agency

About this bridge

West Robbins Rd. over Gravelly Ditch is a concrete culvert carrying West Robbins Rd. over Gravelly Ditch in Sussex County, Delaware. It was built in 2023, so it is 2 years old, younger than the Delaware average of 47.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 9 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 518 vehicles a day, roughly 17% of them trucks, projected to reach 612 by 2042. The structure is 25 ft (7.6 m) long. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesWest Robbins Rd.
CrossesGravelly Ditch
LocationN.W. of Georgetown
RouteCounty Highway 579
CountySussex County
StateDelaware
Coordinates38.75285, -75.45097
Functional classRural 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 protection8 Very GoodNo problems noted.
Culvert9 ExcellentNo problems noted.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation9: Superior to present desirable criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating83.2 US tons
Inventory rating64.3 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans1
Design loadHL 93
Structure length25 ft (7.6 m)
Longest span25 ft (7.6 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic518 (2022)
Projected traffic612 by 2042
Trucks17%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

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 West Robbins Rd. over Gravelly Ditch built?

It was built in 2023, making it 2 years old in 2025.

What condition is West Robbins Rd. over Gravelly Ditch 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 June 2023.

How much traffic does West Robbins Rd. over Gravelly Ditch carry?

About 518 vehicles per day (2022 count), of which roughly 17% are trucks.

How long is West Robbins Rd. over Gravelly Ditch?

The structure is 25 ft (7.6 m) long with a longest span of 25 ft (7.6 m).

Who owns West Robbins Rd. over Gravelly Ditch?

It is owned by the State Highway Agency.