US Bridges

ST181 Mill Vlly RD over Water Jabish Brook

Fair

Hampshire County, Massachusetts · 1.8 MI SE of RTE 202 · Structure no. B050070L6MUNNBI

Built
1955
70 years old
Condition
Fair
inspected November 2023
Type
Slab
Prestressed Concrete
Length
31 ft
1 main span
Daily traffic
9,828
2019 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

ST181 Mill Vlly RD over Water Jabish Brook is a prestressed concrete slab carrying ST181 Mill Vlly RD over Water Jabish Brook in Hampshire County, Massachusetts. It was built in 1955, so it is 70 years old, older than the Massachusetts average of 63.8 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 9,828 vehicles a day, roughly 7% of them trucks, projected to reach 6,633 by 2032. The structure is 31 ft (9.6 m) long and 32 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

Open in Google Maps
CarriesST181 Mill Vlly RD
CrossesWater Jabish Brook
Location1.8 MI SE of RTE 202
RouteState Highway 181
CountyHampshire County
StateMassachusetts
Coordinates42.2638, -72.37589
Functional classUrban Other Principal Arterial

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating64.5 US tons
Inventory rating55.9 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadH 20
Structure length31 ft (9.6 m)
Longest span30 ft (9.1 m)
Deck width32 ft (9.8 m)
Roadway width29 ft (8.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,828 (2019)
Projected traffic6,633 by 2032
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerTown or Township Highway Agency
Maintained byTown or Township Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$1.1 million (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was ST181 Mill Vlly RD over Water Jabish Brook built?

It was built in 1955, making it 70 years old in 2025.

What condition is ST181 Mill Vlly RD over Water Jabish Brook 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 November 2023.

How much traffic does ST181 Mill Vlly RD over Water Jabish Brook carry?

About 9,828 vehicles per day (2019 count), of which roughly 7% are trucks.

How long is ST181 Mill Vlly RD over Water Jabish Brook?

The structure is 31 ft (9.6 m) long with a longest span of 30 ft (9.1 m) and a deck 32 ft wide.

Who owns ST181 Mill Vlly RD over Water Jabish Brook?

It is owned by the Town or Township Highway Agency.