US Bridges

ST 21 Jabish ST over Water Jabish Brook

Fair

Hampshire County, Massachusetts · .1 M W JCT ST 9 · Structure no. B050160VMMUNNBI

Built
1956
69 years old
Condition
Fair
inspected June 2024
Type
Slab
Prestressed Concrete
Length
41 ft
1 main span
Daily traffic
5,560
2024 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

ST 21 Jabish ST over Water Jabish Brook is a prestressed concrete slab carrying ST 21 Jabish ST over Water Jabish Brook in Hampshire County, Massachusetts. It was built in 1956, so it is 69 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 5,560 vehicles a day, roughly 14% of them trucks, projected to reach 7,344 by 2031. The structure is 41 ft (12.6 m) long and 44 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesST 21 Jabish ST
CrossesWater Jabish Brook
Location.1 M W JCT ST 9
RouteState Highway 21
CountyHampshire County
StateMassachusetts
Coordinates42.28283, -72.39297
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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation6: Equal to 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 alignment8: Equal to present desirable criteria
Operating rating92.3 US tons
Inventory rating81.2 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadH 20
Structure length41 ft (12.6 m)
Longest span40 ft (12.2 m)
Deck width44 ft (13.4 m)
Roadway width42 ft (12.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,560 (2024)
Projected traffic7,344 by 2031
Trucks14%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemYes

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$184,000 (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was ST 21 Jabish ST over Water Jabish Brook built?

It was built in 1956, making it 69 years old in 2025.

What condition is ST 21 Jabish ST 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 June 2024.

How much traffic does ST 21 Jabish ST over Water Jabish Brook carry?

About 5,560 vehicles per day (2024 count), of which roughly 14% are trucks.

How long is ST 21 Jabish ST over Water Jabish Brook?

The structure is 41 ft (12.6 m) long with a longest span of 40 ft (12.2 m) and a deck 44 ft wide.

Who owns ST 21 Jabish ST over Water Jabish Brook?

It is owned by the Town or Township Highway Agency.