US Bridges

ST 41 N Undermtn R over Water Karner Brook

Good

Berkshire County, Massachusetts · At Int. W/ Route 23 · Structure no. E080058M4DOTNBI

Built
2010
15 years old
Condition
Good
inspected January 2025
Type
Stringer/Multi-beam or Girder
Steel
Length
30 ft
1 main span
Daily traffic
2,643
2023 count
Owner
State
State Highway Agency

About this bridge

ST 41 N Undermtn R over Water Karner Brook is a steel stringer/multi-beam or girder carrying ST 41 N Undermtn R over Water Karner Brook in Berkshire County, Massachusetts. It was built in 2010, so it is 15 years old, younger than the Massachusetts average of 63.8 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 2,643 vehicles a day, roughly 8% of them trucks, projected to reach 4,422 by 2032. The structure is 30 ft (9.2 m) long and 53 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesST 41 N Undermtn R
CrossesWater Karner Brook
LocationAt Int. W/ Route 23
RouteState Highway 41
CountyBerkshire County
StateMassachusetts
Coordinates42.1588, -73.42167
Functional classRural Major Collector

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.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJanuary 2025
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 adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating110.1 US tons
Inventory rating102.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length30 ft (9.2 m)
Longest span26 ft (8 m)
Deck width53 ft (16.2 m)
Roadway width37 ft (11.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,643 (2023)
Projected traffic4,422 by 2032
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$493,000 (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was ST 41 N Undermtn R over Water Karner Brook built?

It was built in 2010, making it 15 years old in 2025.

What condition is ST 41 N Undermtn R over Water Karner Brook 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 January 2025.

How much traffic does ST 41 N Undermtn R over Water Karner Brook carry?

About 2,643 vehicles per day (2023 count), of which roughly 8% are trucks.

How long is ST 41 N Undermtn R over Water Karner Brook?

The structure is 30 ft (9.2 m) long with a longest span of 26 ft (8 m) and a deck 53 ft wide.

Who owns ST 41 N Undermtn R over Water Karner Brook?

It is owned by the State Highway Agency.