US Bridges

I 495 over Water Mill Pond

Good

Middlesex County, Massachusetts · @mm 78.7 1.25 MI NE Rt 2 · Structure no. L130251UWDOTNBI

Built
1961
64 years old, rebuilt 1975
Condition
Good
inspected November 2024
Type
Culvert
Concrete Continuous
Length
35 ft
2 main spans
Daily traffic
116,909
2024 count
Owner
State
State Highway Agency

About this bridge

I 495 over Water Mill Pond is a concrete continuous culvert carrying I 495 over Water Mill Pond in Middlesex County, Massachusetts. It was built in 1961 and reconstructed in 1975, so it is 64 years old, older than the Massachusetts average of 63.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 116,909 vehicles a day, roughly 14% of them trucks, projected to reach 157,930 by 2031. The structure is 35 ft (10.7 m) long. If it were closed, the detour would be 0.6 mi (1 km).

CarriesI 495
CrossesWater Mill Pond
Location@mm 78.7 1.25 MI NE Rt 2
RouteInterstate 495
Coordinates42.53463, -71.49712
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert7 GoodSome minor problems.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating67.2 US tons
Inventory rating40.2 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadHS 20
Structure length35 ft (10.7 m)
Longest span16 ft (4.9 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic116,909 (2024)
Projected traffic157,930 by 2031
Trucks14%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$250,000 (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was I 495 over Water Mill Pond built?

It was built in 1961, making it 64 years old in 2025. It was reconstructed in 1975.

What condition is I 495 over Water Mill Pond in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in November 2024.

How much traffic does I 495 over Water Mill Pond carry?

About 116,909 vehicles per day (2024 count), of which roughly 14% are trucks.

How long is I 495 over Water Mill Pond?

The structure is 35 ft (10.7 m) long with a longest span of 16 ft (4.9 m).

Who owns I 495 over Water Mill Pond?

It is owned by the State Highway Agency.