US Bridges

Old Mill RD./752 over Back Creek

Good

Roanoke County, Virginia · 0.20 RTE221; 0.05 RTE1765 · Structure no. 000000000015101

Built
1989
36 years old
Condition
Good
inspected February 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
122 ft
2 main spans
Daily traffic
484
2018 count
Owner
State
State Highway Agency

About this bridge

Old Mill RD./752 over Back Creek is a steel stringer/multi-beam or girder carrying Old Mill RD./752 over Back Creek in Roanoke County, Virginia. It was built in 1989, so it is 36 years old, younger than the Virginia average of 50.7 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 484 vehicles a day, projected to reach 658 by 2042. The structure is 122 ft (37.2 m) long and 32 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesOld Mill RD./752
CrossesBack Creek
Location0.20 RTE221; 0.05 RTE1765
RouteCounty Highway 752
CountyRoanoke County
StateVirginia
Coordinates37.1971, -80.05831
Functional classUrban Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionFebruary 2024
Inspection intervalevery 24 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 rating86 US tons
Inventory rating66 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans2
Design loadHL 93
Structure length122 ft (37.2 m)
Longest span71 ft (21.6 m)
Deck width32 ft (9.8 m)
Roadway width29 ft (8.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic484 (2018)
Projected traffic658 by 2042
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 Old Mill RD./752 over Back Creek built?

It was built in 1989, making it 36 years old in 2025.

What condition is Old Mill RD./752 over Back Creek 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 February 2024.

How much traffic does Old Mill RD./752 over Back Creek carry?

About 484 vehicles per day (2018 count).

How long is Old Mill RD./752 over Back Creek?

The structure is 122 ft (37.2 m) long with a longest span of 71 ft (21.6 m) and a deck 32 ft wide.

Who owns Old Mill RD./752 over Back Creek?

It is owned by the State Highway Agency.