US Bridges

HWY Birnam RD over Water Mill Brook

PoorPosted for load

Franklin County, Massachusetts · 900 N of JCT Warwick RD · Structure no. N220100RJMUNNBI

Built
1937
88 years old
Condition
Poor
inspected July 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
66 ft
1 main span
Daily traffic
258
2017 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

HWY Birnam RD over Water Mill Brook is a steel stringer/multi-beam or girder carrying HWY Birnam RD over Water Mill Brook in Franklin County, Massachusetts. It was built in 1937, so it is 88 years old, older than the Massachusetts average of 63.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.

It carries about 258 vehicles a day, roughly 3% of them trucks, projected to reach 474 by 2032. The structure is 66 ft (20.1 m) long and 28 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesHWY Birnam RD
CrossesWater Mill Brook
Location900 N of JCT Warwick RD
RouteCity Street 0
Coordinates42.69363, -72.44489
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
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 inspectionJuly 2023
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation2: Basically intolerable, requiring high priority of replacement
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating10.6 US tons
Inventory rating6.4 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length66 ft (20.1 m)
Longest span63 ft (19.2 m)
Deck width28 ft (8.4 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic258 (2017)
Projected traffic474 by 2032
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$4.8 million (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was HWY Birnam RD over Water Mill Brook built?

It was built in 1937, making it 88 years old in 2025.

What condition is HWY Birnam RD over Water Mill Brook in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in July 2023.

How much traffic does HWY Birnam RD over Water Mill Brook carry?

About 258 vehicles per day (2017 count), of which roughly 3% are trucks.

How long is HWY Birnam RD over Water Mill Brook?

The structure is 66 ft (20.1 m) long with a longest span of 63 ft (19.2 m) and a deck 28 ft wide.

Who owns HWY Birnam RD over Water Mill Brook?

It is owned by the Town or Township Highway Agency.