US Bridges

Is 464 Nbl over Milldam Creek

Fair

Chesapeake city, Virginia · 0.73 MI FR Int US 13 · Structure no. 000000000021955

Built
1986
39 years old
Condition
Fair
inspected May 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
606 ft
7 main spans
Daily traffic
24,637
2022 count
Owner
State
State Highway Agency

About this bridge

Is 464 Nbl over Milldam Creek is a prestressed concrete continuous stringer/multi-beam or girder carrying Is 464 Nbl over Milldam Creek in Chesapeake city, Virginia. It was built in 1986, so it is 39 years old, younger than the Virginia average of 50.7 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 24,637 vehicles a day, projected to reach 33,887 by 2042. The structure is 606 ft (184.8 m) long and 66 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesIs 464 Nbl
CrossesMilldam Creek
Location0.73 MI FR Int US 13
RouteInterstate 464
CountyChesapeake city
StateVirginia
Coordinates36.78334, -76.28455
Functional classUrban Principal Arterial - Interstate

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating103 US tons
Inventory rating80 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, precast panels
Main spans7 (+4 approach)
Design loadHS 20 + Mod
Structure length606 ft (184.8 m)
Longest span58 ft (17.8 m)
Deck width66 ft (20.1 m)
Roadway width62 ft (19 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic24,637 (2022)
Projected traffic33,887 by 2042
Trucks0%
Lanes on structure4
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Is 464 Nbl over Milldam Creek built?

It was built in 1986, making it 39 years old in 2025.

What condition is Is 464 Nbl over Milldam 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 May 2024.

How much traffic does Is 464 Nbl over Milldam Creek carry?

About 24,637 vehicles per day (2022 count).

How long is Is 464 Nbl over Milldam Creek?

The structure is 606 ft (184.8 m) long with a longest span of 58 ft (17.8 m) and a deck 66 ft wide.

Who owns Is 464 Nbl over Milldam Creek?

It is owned by the State Highway Agency.