US Bridges

Darley RD over Naamans Creek

Fair

New Castle County, Delaware · Claymont · Structure no. 1054 207

Built
1964
61 years old, rebuilt 2003
Condition
Fair
inspected March 2022
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
46 ft
1 main span
Daily traffic
6,438
2020 count
Owner
State
State Highway Agency

About this bridge

Darley RD over Naamans Creek is a prestressed concrete box beam or girders - multiple carrying Darley RD over Naamans Creek in New Castle County, Delaware. It was built in 1964 and reconstructed in 2003, so it is 61 years old, older than the Delaware average of 47.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 6,438 vehicles a day, roughly 7% of them trucks, projected to reach 9,697 by 2042. The structure is 46 ft (14.1 m) long and 54 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesDarley RD
CrossesNaamans Creek
LocationClaymont
RouteCounty Highway 207
CountyNew Castle County
StateDelaware
Coordinates39.8102, -75.45922
Functional classUrban Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMarch 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating71.8 US tons
Inventory rating56.1 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length46 ft (14.1 m)
Longest span41 ft (12.5 m)
Deck width54 ft (16.5 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,438 (2020)
Projected traffic9,697 by 2042
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 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 Darley RD over Naamans Creek built?

It was built in 1964, making it 61 years old in 2025. It was reconstructed in 2003.

What condition is Darley RD over Naamans Creek in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in March 2022.

How much traffic does Darley RD over Naamans Creek carry?

About 6,438 vehicles per day (2020 count), of which roughly 7% are trucks.

How long is Darley RD over Naamans Creek?

The structure is 46 ft (14.1 m) long with a longest span of 41 ft (12.5 m) and a deck 54 ft wide.

Who owns Darley RD over Naamans Creek?

It is owned by the State Highway Agency.