US Bridges

HWY S Main ST over Water Mill River

FairPosted for load

Hampshire County, Massachusetts · SW of RT9 .5MI N of Nhptn · Structure no. W360170J9MUNNBI

Built
1957
68 years old
Condition
Fair
inspected May 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
67 ft
1 main span
Daily traffic
600
2009 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

HWY S Main ST over Water Mill River is a steel stringer/multi-beam or girder carrying HWY S Main ST over Water Mill River in Hampshire County, Massachusetts. It was built in 1957, so it is 68 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. Its operating status is: posted for load restriction.

It carries about 600 vehicles a day, roughly 6% of them trucks, projected to reach 948 by 2032. The structure is 67 ft (20.4 m) long and 30 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesHWY S Main ST
CrossesWater Mill River
LocationSW of RT9 .5MI N of Nhptn
RouteCity Street 0
CountyHampshire County
StateMassachusetts
Coordinates42.37471, -72.70391
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating44.2 US tons
Inventory rating26.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length67 ft (20.4 m)
Longest span58 ft (17.7 m)
Deck width30 ft (9.1 m)
Roadway width21 ft (6.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic600 (2009)
Projected traffic948 by 2032
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed0.6 mi (1 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$1.9 million (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was HWY S Main ST over Water Mill River built?

It was built in 1957, making it 68 years old in 2025.

What condition is HWY S Main ST over Water Mill River 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 May 2024.

How much traffic does HWY S Main ST over Water Mill River carry?

About 600 vehicles per day (2009 count), of which roughly 6% are trucks.

How long is HWY S Main ST over Water Mill River?

The structure is 67 ft (20.4 m) long with a longest span of 58 ft (17.7 m) and a deck 30 ft wide.

Who owns HWY S Main ST over Water Mill River?

It is owned by the Town or Township Highway Agency.