US Bridges

Walnut ST/US13 NB over Shopping Plaza Drainage

Good

New Castle County, Delaware · S. of Wilmigton · Structure no. 1683 029

Built
2010
15 years old
Condition
Good
inspected April 2022
Type
Culvert
Concrete
Length
31 ft
2 main spans
Daily traffic
11,684
2020 count
Owner
State
State Highway Agency

About this bridge

Walnut ST/US13 NB over Shopping Plaza Drainage is a concrete culvert carrying Walnut ST/US13 NB over Shopping Plaza Drainage in New Castle County, Delaware. It was built in 2010, so it is 15 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 11,684 vehicles a day, roughly 7% of them trucks, projected to reach 35,944 by 2042. The structure is 31 ft (9.4 m) long and 101 ft wide.

Location

Open in Google Maps
CarriesWalnut ST/US13 NB
CrossesShopping Plaza Drainage
LocationS. of Wilmigton
RouteU.S. Route 13
CountyNew Castle County
StateDelaware
Coordinates39.73192, -75.55337
Functional classUrban Other Principal Arterial

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 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46.4 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, precast panels
Main spans2
Design loadHL 93
Structure length31 ft (9.4 m)
Longest span14 ft (4.4 m)
Deck width101 ft (30.8 m)
Roadway width56 ft (17.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,684 (2020)
Projected traffic35,944 by 2042
Trucks7%
Lanes on structure4
Traffic directionOne-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 Walnut ST/US13 NB over Shopping Plaza Drainage built?

It was built in 2010, making it 15 years old in 2025.

What condition is Walnut ST/US13 NB over Shopping Plaza Drainage 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 2022.

How much traffic does Walnut ST/US13 NB over Shopping Plaza Drainage carry?

About 11,684 vehicles per day (2020 count), of which roughly 7% are trucks.

How long is Walnut ST/US13 NB over Shopping Plaza Drainage?

The structure is 31 ft (9.4 m) long with a longest span of 14 ft (4.4 m) and a deck 101 ft wide.

Who owns Walnut ST/US13 NB over Shopping Plaza Drainage?

It is owned by the State Highway Agency.