US Bridges

HWY Union ST over Water North Canal

Poor

Essex County, Massachusetts · .32 KM North Merrimac R · Structure no. L040042PXMUNNBI

Built
1860
165 years old, rebuilt 1939
Condition
Poor
inspected April 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
76 ft
1 main span
Daily traffic
18,300
2024 count
Owner
City
City or Municipal Highway Agency

About this bridge

HWY Union ST over Water North Canal is a steel stringer/multi-beam or girder carrying HWY Union ST over Water North Canal in Essex County, Massachusetts. It was built in 1860 and reconstructed in 1939, so it is 165 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 3 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.

It carries about 18,300 vehicles a day, roughly 3% of them trucks, projected to reach 45,168 by 2032. The structure is 76 ft (23.2 m) long and 50 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesHWY Union ST
CrossesWater North Canal
Location.32 KM North Merrimac R
RouteCity Street 0
Coordinates42.70632, -71.15341
Functional classUrban Minor Arterial

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
Deck3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2024
Inspection intervalevery 6 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating70.8 US tons
Inventory rating42.4 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length76 ft (23.2 m)
Longest span72 ft (22 m)
Deck width50 ft (15.2 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic18,300 (2024)
Projected traffic45,168 by 2032
Trucks3%
Lanes on structure3
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

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$3.6 million (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was HWY Union ST over Water North Canal built?

It was built in 1860, making it 165 years old in 2025. It was reconstructed in 1939.

What condition is HWY Union ST over Water North Canal 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 April 2024.

How much traffic does HWY Union ST over Water North Canal carry?

About 18,300 vehicles per day (2024 count), of which roughly 3% are trucks.

How long is HWY Union ST over Water North Canal?

The structure is 76 ft (23.2 m) long with a longest span of 72 ft (22 m) and a deck 50 ft wide.

Who owns HWY Union ST over Water North Canal?

It is owned by the City or Municipal Highway Agency.