US Bridges

Old Boston Road over Withrow Branch

Fair

Nelson County, Kentucky · .7 MI W of W-Jct US 31E · Structure no. 090C00073N

Built
1934
91 years old
Condition
Fair
inspected July 2023
Type
Culvert
Concrete
Length
32 ft
3 main spans
Daily traffic
87
2010 count
Owner
County
County Highway Agency

About this bridge

Old Boston Road over Withrow Branch is a concrete culvert carrying Old Boston Road over Withrow Branch in Nelson County, Kentucky. It was built in 1934, so it is 91 years old, older than the Kentucky average of 46.6 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 87 vehicles a day, projected to reach 87 by 2030. The structure is 32 ft (9.8 m) long and 42 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesOld Boston Road
CrossesWithrow Branch
Location.7 MI W of W-Jct US 31E
RouteCounty Highway 1700
CountyNelson County
StateKentucky
Coordinates37.80917, -85.48611
Functional classUrban Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating92.5 US tons
Inventory rating55.6 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadH 15
Structure length32 ft (9.8 m)
Longest span10 ft (3 m)
Deck width42 ft (12.8 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic87 (2010)
Projected traffic87 by 2030
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Old Boston Road over Withrow Branch built?

It was built in 1934, making it 91 years old in 2025.

What condition is Old Boston Road over Withrow Branch 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 2023.

How much traffic does Old Boston Road over Withrow Branch carry?

About 87 vehicles per day (2010 count).

How long is Old Boston Road over Withrow Branch?

The structure is 32 ft (9.8 m) long with a longest span of 10 ft (3 m) and a deck 42 ft wide.

Who owns Old Boston Road over Withrow Branch?

It is owned by the County Highway Agency.