US Bridges

Friendship RD.636 over Rte. I 81

Good

Montgomery County, Virginia · 1.15-RT 11;0.15-RT820 · Structure no. 000000000029535

Built
2012
13 years old
Condition
Good
inspected April 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
214 ft
2 main spans
Daily traffic
280
2020 count
Owner
State
State Highway Agency

About this bridge

Friendship RD.636 over Rte. I 81 is a prestressed concrete continuous stringer/multi-beam or girder carrying Friendship RD.636 over Rte. I 81 in Montgomery County, Virginia. It was built in 2012, so it is 13 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 280 vehicles a day, projected to reach 420 by 2045. The structure is 214 ft (65.3 m) long and 29 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesFriendship RD.636
CrossesRte. I 81
Location1.15-RT 11;0.15-RT820
RouteCounty Highway 636
CountyMontgomery County
StateVirginia
Coordinates37.17475, -80.30083
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.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating88 US tons
Inventory rating57 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHL 93
Structure length214 ft (65.3 m)
Longest span107 ft (32.6 m)
Deck width29 ft (8.9 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic280 (2020)
Projected traffic420 by 2045
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed3.7 mi (6 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Friendship RD.636 over Rte. I 81 built?

It was built in 2012, making it 13 years old in 2025.

What condition is Friendship RD.636 over Rte. I 81 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 April 2023.

How much traffic does Friendship RD.636 over Rte. I 81 carry?

About 280 vehicles per day (2020 count).

How long is Friendship RD.636 over Rte. I 81?

The structure is 214 ft (65.3 m) long with a longest span of 107 ft (32.6 m) and a deck 29 ft wide.

Who owns Friendship RD.636 over Rte. I 81?

It is owned by the State Highway Agency.