US Bridges

Glenrock DR over South Branch Naamans Ck

Fair

New Castle County, Delaware · West of Claymont · Structure no. 1061 000

Built
1958
67 years old
Condition
Fair
inspected February 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
35 ft
1 main span
Daily traffic
99
2021 count
Owner
State
State Highway Agency

About this bridge

Glenrock DR over South Branch Naamans Ck is a steel stringer/multi-beam or girder carrying Glenrock DR over South Branch Naamans Ck in New Castle County, Delaware. It was built in 1958, so it is 67 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 5 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 99 vehicles a day, roughly 8% of them trucks, projected to reach 124 by 2042. The structure is 35 ft (10.7 m) long and 45 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesGlenrock DR
CrossesSouth Branch Naamans Ck
LocationWest of Claymont
RouteCity Street 0
CountyNew Castle County
StateDelaware
Coordinates39.80408, -75.47056
Functional classUrban Local

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating107.1 US tons
Inventory rating84.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length35 ft (10.7 m)
Longest span33 ft (10.1 m)
Deck width45 ft (13.7 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic99 (2021)
Projected traffic124 by 2042
Trucks8%
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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$235,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Glenrock DR over South Branch Naamans Ck built?

It was built in 1958, making it 67 years old in 2025.

What condition is Glenrock DR over South Branch Naamans Ck 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 February 2023.

How much traffic does Glenrock DR over South Branch Naamans Ck carry?

About 99 vehicles per day (2021 count), of which roughly 8% are trucks.

How long is Glenrock DR over South Branch Naamans Ck?

The structure is 35 ft (10.7 m) long with a longest span of 33 ft (10.1 m) and a deck 45 ft wide.

Who owns Glenrock DR over South Branch Naamans Ck?

It is owned by the State Highway Agency.