ST 99 Alford ST over Water Mystic River
Fair Condition63 years old40,000 vehicles/day
Location
| State | Massachusetts |
| County | Suffolk |
| Location | At Mystic River |
| Carries | ST 99 Alford ST |
| Crosses | Water Mystic River |
| Coordinates | 42.38891, -71.07178 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 7 (Good) |
| Superstructure | 7 (Good) |
| Substructure | 6 (Satisfactory) |
| Channel/Waterway | 5 (Fair) |
| Scour Critical | 4 — Foundations need monitoring |
Physical Characteristics
| Material | Steel |
| Design | Movable - Bascule |
| Total Length | 825.1 ft (251.5 m) |
| Max Span | 159.4 ft (48.6 m) |
| Deck Width | 95.1 ft (29 m) |
| Deck Area | 7293.5 sq m |
| Main Spans | 1 |
| Year Built | 1963 (reconstructed 2014) |
Traffic
| Avg Daily Traffic | 40,000 (2022) |
| Truck Traffic | 6% |
| Lanes On Bridge | 4 |
Inspection & Ownership
| Last Inspection | 624 |
| Inspection Frequency | Every 24 months |
| Owner | City/Municipal Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | B16029388MUNNBI |