US Bridges

Guyencourt RD over Waterway

Good

New Castle County, Delaware · S/E of Centreville · Structure no. 1536 231

Built
2011
14 years old
Condition
Good
inspected April 2021
Type
Culvert
Concrete
Length
21 ft
1 main span
Daily traffic
308
2020 count
Owner
State
State Highway Agency

About this bridge

Guyencourt RD over Waterway is a concrete culvert carrying Guyencourt RD over Waterway in New Castle County, Delaware. It was built in 2011, so it is 14 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 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 308 vehicles a day, roughly 10% of them trucks, projected to reach 382 by 2042. The structure is 21 ft (6.3 m) long. If it were closed, the detour would be 0.6 mi (1 km).

CarriesGuyencourt RD
CrossesWaterway
LocationS/E of Centreville
RouteCounty Highway 231
Coordinates39.81492, -75.58675
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.
Culvert7 GoodSome minor problems.
Last inspectionApril 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating67.9 US tons
Inventory rating46.4 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans1
Design loadHS 20
Structure length21 ft (6.3 m)
Longest span21 ft (6.3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic308 (2020)
Projected traffic382 by 2042
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed0.6 mi (1 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 Guyencourt RD over Waterway built?

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

What condition is Guyencourt RD over Waterway 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 April 2021.

How much traffic does Guyencourt RD over Waterway carry?

About 308 vehicles per day (2020 count), of which roughly 10% are trucks.

How long is Guyencourt RD over Waterway?

The structure is 21 ft (6.3 m) long with a longest span of 21 ft (6.3 m).

Who owns Guyencourt RD over Waterway?

It is owned by the State Highway Agency.