US Bridges

ST 1 A/S Main ST over Water Ipswich River

Fair

Essex County, Massachusetts · .32 KM SE of County RD · Structure no. I010022PQMUNNBI

Built
1764
261 years old, rebuilt 1839
Condition
Fair
inspected June 2023
Type
Arch - Deck
Masonry
Length
68 ft
2 main spans
Daily traffic
26,250
2019 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

ST 1 A/S Main ST over Water Ipswich River is a masonry arch - deck carrying ST 1 A/S Main ST over Water Ipswich River in Essex County, Massachusetts. It was built in 1764 and reconstructed in 1839, so it is 261 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 6 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 26,250 vehicles a day, roughly 5% of them trucks, projected to reach 42,325 by 2032. The structure is 68 ft (20.7 m) long and 37 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesST 1 A/S Main ST
CrossesWater Ipswich River
Location.32 KM SE of County RD
RouteCity Street 1A
Coordinates42.67948, -70.83711
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
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating40.9 US tons
Inventory rating40.8 US tons

Structure

Structure typeArch - Deck
MaterialMasonry
DeckNot applicable
Main spans2
Design loadUnknown
Structure length68 ft (20.7 m)
Longest span30 ft (9.1 m)
Deck width37 ft (11.2 m)
Roadway width25 ft (7.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic26,250 (2019)
Projected traffic42,325 by 2032
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerTown or Township Highway Agency
Maintained byTown or Township Highway Agency
Historic statusListed on the National Register of Historic Places
Work proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$2.9 million (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was ST 1 A/S Main ST over Water Ipswich River built?

It was built in 1764, making it 261 years old in 2025. It was reconstructed in 1839.

What condition is ST 1 A/S Main ST over Water Ipswich 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 June 2023.

How much traffic does ST 1 A/S Main ST over Water Ipswich River carry?

About 26,250 vehicles per day (2019 count), of which roughly 5% are trucks.

How long is ST 1 A/S Main ST over Water Ipswich River?

The structure is 68 ft (20.7 m) long with a longest span of 30 ft (9.1 m) and a deck 37 ft wide.

Who owns ST 1 A/S Main ST over Water Ipswich River?

It is owned by the Town or Township Highway Agency.