US Bridges

ST 9 West Main ST over Water Muddy Brook

Fair

Hampshire County, Massachusetts · 100 E JCT Vernon ST · Structure no. W050180UXDOTNBI

Built
1958
67 years old
Condition
Fair
inspected September 2024
Type
Slab
Prestressed Concrete
Length
44 ft
1 main span
Daily traffic
6,331
2018 count
Owner
State
State Highway Agency

About this bridge

ST 9 West Main ST over Water Muddy Brook is a prestressed concrete slab carrying ST 9 West Main ST over Water Muddy Brook in Hampshire County, Massachusetts. It was built in 1958, so it is 67 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 5 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 6,331 vehicles a day, roughly 4% of them trucks, projected to reach 10,739 by 2031. The structure is 44 ft (13.4 m) long and 52 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesST 9 West Main ST
CrossesWater Muddy Brook
Location100 E JCT Vernon ST
RouteState Highway 9
CountyHampshire County
StateMassachusetts
Coordinates42.25939, -72.25011
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
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 rating78 US tons
Inventory rating46.7 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadH 20
Structure length44 ft (13.4 m)
Longest span43 ft (13 m)
Deck width52 ft (15.8 m)
Roadway width42 ft (12.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,331 (2018)
Projected traffic10,739 by 2031
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$2.2 million (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was ST 9 West Main ST over Water Muddy Brook built?

It was built in 1958, making it 67 years old in 2025.

What condition is ST 9 West Main ST over Water Muddy 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 September 2024.

How much traffic does ST 9 West Main ST over Water Muddy Brook carry?

About 6,331 vehicles per day (2018 count), of which roughly 4% are trucks.

How long is ST 9 West Main ST over Water Muddy Brook?

The structure is 44 ft (13.4 m) long with a longest span of 43 ft (13 m) and a deck 52 ft wide.

Who owns ST 9 West Main ST over Water Muddy Brook?

It is owned by the State Highway Agency.