Structure L150102NEDOT634 · Middlesex County, MA

HWY School ST over Water Pawtucket Canal

Carries HWY School ST over Water Pawtucket Canal, 0.40 Km S School & Brdway.

Overall conditionFair

Set by its lowest-rated component: Substructure at 6 of 9.

How ratings work
Deck7/9 · Good
Superstructure7/9 · Good
Substructuresets the rating6/9 · Satisfactory
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT149 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 6/9 · sets the rating

149 ft end to end: about 2 semi-trucks nose to tail. Lengths and the semi-truck on the deck are drawn to the same scale. Each part is colored by its latest inspection rating. The inventory records lengths but not heights or the layout of the shorter spans, so those are drawn as typical for a multi-beam bridge.

Built199531 years old
Length149.0 ft45.4 m
Daily traffic17,457counted 2019
Last inspectedSeptember 2023every 24 months

Location

StateMassachusetts
CountyMiddlesex
Location0.40 Km S School & Brdway
CarriesHWY School ST
CrossesWater Pawtucket Canal
Coordinates42.64027, -71.32503

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length149.0 ft (45.4 m)
Max Span147.0 ft (44.8 m)
Deck Width48.6 ft (14.8 m)
Deck Area671.9 sq m
Main Spans1
Year Built1995

Traffic

Avg Daily Traffic17,457 (2019)
Truck Traffic5%
Lanes On Bridge2

Inspection & Ownership

Last InspectionSeptember 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is possibly eligible (requires evaluation)
Scour Critical8 — Stable, low risk
Structure NumberL150102NEDOT634

How Bridge Ratings Work

Inspectors rate each major part of a bridge (the deck you drive on, the superstructure of beams that holds it up, and the substructure of piers and abutments beneath) on a 0–9 scale. A bridge's overall condition is its lowest of those ratings, so one deteriorated component makes the whole bridge "poor."

0Failed
1Imminent failure
2Critical
3Serious
4Poor
5Fair
6Satisfactory
7Good
8Very good
9Excellent
Good · lowest component 7–9
Fair · lowest component 5–6
Poor · lowest component 0–4

A poor rating is not a closure. It means the bridge is flagged for priority repair or replacement; bridges judged unsafe are closed or posted with weight limits. The waterway (channel) rating is reported, but it does not count toward the overall classification.

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