US Bridges

Is 464 Sbl over NS RR & Br Milldam Creek

Fair

Chesapeake city, Virginia · 0.28MI FR RTE13/0.25TO460 · Structure no. 000000000021954

Built
1984
41 years old
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
280 ft
4 main spans
Daily traffic
27,666
2022 count
Owner
State
State Highway Agency

About this bridge

Is 464 Sbl over NS RR & Br Milldam Creek is a prestressed concrete stringer/multi-beam or girder carrying Is 464 Sbl over NS RR & Br Milldam Creek in Chesapeake city, Virginia. It was built in 1984, so it is 41 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 27,666 vehicles a day, projected to reach 40,392 by 2042. The structure is 280 ft (85.3 m) long and 62 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesIs 464 Sbl
CrossesNS RR & Br Milldam Creek
Location0.28MI FR RTE13/0.25TO460
RouteInterstate 464
CountyChesapeake city
StateVirginia
Coordinates36.77759, -76.28087
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJuly 2024
Inspection intervalevery 21 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 adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99 US tons
Inventory rating85 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20 + Mod
Structure length280 ft (85.3 m)
Longest span70 ft (21.3 m)
Deck width62 ft (19 m)
Roadway width59 ft (18 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic27,666 (2022)
Projected traffic40,392 by 2042
Trucks0%
Lanes on structure4
Traffic directionOne-way traffic
CarriesHighway
CrossesRailroad and waterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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 Sbl over NS RR & Br Milldam Creek built?

It was built in 1984, making it 41 years old in 2025.

What condition is Is 464 Sbl over NS RR & Br 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 July 2024.

How much traffic does Is 464 Sbl over NS RR & Br Milldam Creek carry?

About 27,666 vehicles per day (2022 count).

How long is Is 464 Sbl over NS RR & Br Milldam Creek?

The structure is 280 ft (85.3 m) long with a longest span of 70 ft (21.3 m) and a deck 62 ft wide.

Who owns Is 464 Sbl over NS RR & Br Milldam Creek?

It is owned by the State Highway Agency.