US Bridges

Forbes Mill RD 640 over Br. of Big Otter River

Good

Bedford County, Virginia · 0.40 Rt 122; 1.00 Rt 682 · Structure no. 000000000002735

Built
1932
93 years old
Condition
Good
inspected August 2023
Type
Slab
Concrete
Length
32 ft
1 main span
Daily traffic
541
2016 count
Owner
State
State Highway Agency

About this bridge

Forbes Mill RD 640 over Br. of Big Otter River is a concrete slab carrying Forbes Mill RD 640 over Br. of Big Otter River in Bedford County, Virginia. It was built in 1932, so it is 93 years old, older 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 541 vehicles a day, projected to reach 706 by 2045. The structure is 32 ft (9.8 m) long and 16 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesForbes Mill RD 640
CrossesBr. of Big Otter River
Location0.40 Rt 122; 1.00 Rt 682
RouteCounty Highway 640
CountyBedford County
StateVirginia
Coordinates37.39273, -79.51095
Functional classRural 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 inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating89 US tons
Inventory rating69 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckOther
Main spans1
Design loadHL 93
Structure length32 ft (9.8 m)
Longest span30 ft (9.2 m)
Deck width16 ft (4.9 m)
Roadway width15 ft (4.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic541 (2016)
Projected traffic706 by 2045
Trucks0%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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 Forbes Mill RD 640 over Br. of Big Otter River built?

It was built in 1932, making it 93 years old in 2025.

What condition is Forbes Mill RD 640 over Br. of Big Otter River 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 August 2023.

How much traffic does Forbes Mill RD 640 over Br. of Big Otter River carry?

About 541 vehicles per day (2016 count).

How long is Forbes Mill RD 640 over Br. of Big Otter River?

The structure is 32 ft (9.8 m) long with a longest span of 30 ft (9.2 m) and a deck 16 ft wide.

Who owns Forbes Mill RD 640 over Br. of Big Otter River?

It is owned by the State Highway Agency.