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Bridge Statistics for Somerville, Massachusetts (MA)
Condition, Traffic, Stress, Structural Evaluation, Project Costs


  • National Bridge Inventory (NBI) Statistics
  • 26Number of bridges
  • 738ft / 225mTotal length
  • $313,594,000Total costs
  • 764,503Total average daily traffic
  • 72,305Total average daily truck traffic
  • 933,067Total future (year 2031) average daily traffic
  • National Bridge Inventory (NBI) Registered Bridges for Somerville
  • No street view available for this location

New bridges in Somerville, MA - historical statistics
  • New bridges - historical statistics
  • 3Before 1900
  • 21900-1909
  • 41910-1919
  • 21920-1929
  • 11930-1939
  • 31950-1959
  • 61970-1979
  • 11980-1989
  • 11990-1999
  • 12000-2009
  • 12010-2019
  • 12020-2022
Reconstructed bridges in Somerville, MA - Historical Statistics
  • Reconstructed bridges - Historical Statistics
  • 51970-1979
  • 31980-1989
  • 21990-1999
  • 32000-2009
  • 12010-2019
Average Bridge Daily Traffic in Somerville, MA
Bridge Condition - Deck
  • Bridge Condition - Deck
  • 30.8%Good
  • 42.3%Satisfactory
  • 26.9%Fair
Bridge Condition - Superstructure
  • Bridge Condition - Superstructure
  • 7.7%Very good
  • 23.1%Good
  • 38.5%Satisfactory
  • 15.4%Fair
  • 11.5%Poor
  • 3.8%Serious
Bridge Condition - Substructure
  • Bridge Condition - Substructure
  • 3.8%Very good
  • 15.4%Good
  • 38.5%Satisfactory
  • 38.5%Fair
  • 3.8%Poor
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Structure Number: S170053G2DOT634,  Location: 1.6 KM S JCT SR28&38 (Lat: 42.382917,  Lng: -71.090000),  Route carried "on" structure: City street ,  Year Built: 1928,  Year Reconstructed: 2014,  Status: Open,  Structure Length: 3.44m (11.29ft),  Average Daily Traffic: 8,500 (year 2018),  Truck Traffic: 5%,  Average Future Daily Traffic: 16,267 (year 2032),  Design Load: HS 25 or greater,  Features Intersected: RR MBTA/BMRR,  Facility Carried by Structure: HWY CROSS ST
Minimum Vertical Clearance: 4.57m (14.99ft),  Kilometerpoint: 0.000,  Lanes on structure: 2,  Owner: State Highway Agency,  Approaching Roadway Width: 8.5m (27.9ft),  Skew: 3 degrees,  Material/Design: Steel,  Design/Construction: Truss - Thru,  Number Of Spans In Main Unit: 1,  Length of Maximum Span: 32.9m (107.9ft),  Curb or Sidewalk Widths: Left: 1.9m (6.2ft),  Right: 1.9m (6.2ft),  Curb-To-Curb Width: 8.4m (27.6ft),  Out-to-Out Width: 14.3m (46.9ft)

Condition: Deck: Good,  Superstructure: Good,  Substructure: Good,  Operating Rating: 95.9 metric tons,  Method Used To Determine Operating Rating: Load Factor (LF),  Inventory Rating: 57.4 metric tons,  Method Used To Determine Inventory Rating: Load Factor (LF),  Structural Evaluation: Better than present minimum criteria,  Deck Geometry: High priority of replacement,  Underclear: High priority of corrective action,  Approach Roadway Alignment: High priority of corrective action,  Designated Inspection Frequency: Every 24 months,  Critical Feature Inspection Frequency: Every 24 months,  Inspection Date: September 2020,  Critical Feature Inspection Date: September 2020,  Deck Structure Type: Concrete Cast-file-Place,  Wearing Surface/Protective System: Wearing Surface: Bituminous
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Structure Number: S170063G3DOT634,  Location: 1.1 KM SW JCT SR28&3 (Lat: 42.386381,  Lng: -71.093494),  Route carried "on" structure: City street ,  Year Built: 1902,  Year Reconstructed: 2003,  Status: Open,  Structure Length: 2.49m (8.17ft),  Average Daily Traffic: 3,900 (year 2019),  Truck Traffic: 6%,  Average Future Daily Traffic: 6,949 (year 2032),  Design Load: HS 20,  Features Intersected: RR MBTA/BMRR,  Facility Carried by Structure: HWY WALNUT ST
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 0.660,  Lanes on structure: 2,  Owner: State Highway Agency,  Approaching Roadway Width: 7.6m (24.9ft),  Skew: 2 degrees,  Material/Design: Prestressed concrete,  Design/Construction: Box Beam or Girders - Multiple,  Number Of Spans In Main Unit: 1,  Length of Maximum Span: 23.7m (77.8ft),  Curb or Sidewalk Widths: Left: 1.8m (5.9ft),  Right: 1.8m (5.9ft),  Curb-To-Curb Width: 7.9m (25.9ft),  Out-to-Out Width: 12.3m (40.4ft)

Condition: Deck: Satisfactory,  Superstructure: Satisfactory,  Substructure: Satisfactory,  Operating Rating: 73.3 metric tons,  Method Used To Determine Operating Rating: Load Factor (LF),  Inventory Rating: 48.1 metric tons,  Method Used To Determine Inventory Rating: Load Factor (LF),  Structural Evaluation: Equal to present minimum criteria,  Deck Geometry: High priority of replacement,  Underclear: High priority of corrective action,  Approach Roadway Alignment: Better than present minimum criteria,  Length Of Structure Improvement: 2.50m (8.20ft),  Designated Inspection Frequency: Every 24 months,  Inspection Date: October 2021,  Bridge Improvement Cost: $1,155,000,  Roadway Improvement Cost: $116,000,  Total Project Cost: $1,733,000 ( Estimate for 2022),  Deck Structure Type: Concrete Precast Panels,  Wearing Surface/Protective System: Wearing Surface: Latex Concrete,  Deck Protection: Epoxy Coated Reinforcing
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Structure Number: S170073G4DOT634,  Location: .7 MI SW OF JCT SR28&38 (Lat: 42.387431,  Lng: -71.095403),  Route carried "on" structure: City street ,  Year Built: 1910,  Year Reconstructed: 1983,  Status: Closed,  Structure Length: 4.57m (14.99ft),  Average Daily Traffic: 15,000 (year 2017),  Truck Traffic: 10%,  Average Future Daily Traffic: 19,741 (year 2032),  Design Load: HS 20,  Features Intersected: RR MBTA/BMRR,  Facility Carried by Structure: HWY MEDFORD ST
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 0.370,  Lanes on structure: 2,  Owner: State Highway Agency,  Approaching Roadway Width: 11.0m (36.1ft),  Skew: 2 degrees,  Material/Design: Steel,  Design/Construction: Girder and Floorbeam System,  Number Of Spans In Main Unit: 1,  Length of Maximum Span: 42.7m (140.1ft),  Curb or Sidewalk Widths: Left: 1.7m (5.6ft),  Right: 1.6m (5.2ft),  Curb-To-Curb Width: 10.1m (33.1ft),  Out-to-Out Width: 15.2m (49.9ft)

Condition: Deck: Satisfactory,  Superstructure: Satisfactory,  Substructure: Fair,  Operating Rating: 50.1 metric tons,  Method Used To Determine Operating Rating: Allowable Stress (AS),  Inventory Rating: 26.4 metric tons,  Method Used To Determine Inventory Rating: Allowable Stress (AS),  Structural Evaluation: Somewhat better than minimum adequacy,  Deck Geometry: Meets minimum limits,  Approach Roadway Alignment: Equal to present minimum criteria,  Length Of Structure Improvement: 4.60m (15.09ft),  Designated Inspection Frequency: Every 24 months,  Critical Feature Inspection Frequency: Every 24 months,  Inspection Date: October 2021,  Critical Feature Inspection Date: October 2021,  Bridge Improvement Cost: $2,747,000,  Roadway Improvement Cost: $275,000,  Total Project Cost: $4,121,000 ( Estimate for 2022),  Deck Structure Type: Concrete Cast-file-Place,  Wearing Surface/Protective System: Wearing Surface: Bituminous,  Membrane: Other
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Structure Number: S170083G5DOT634,  Location: 1.3 KM SW OF JCT SR28&38 (Lat: 42.388439,  Lng: -71.097644),  Route carried "on" structure: City street ,  Year Built: 1898,  Year Reconstructed: 2001,  Status: Open,  Structure Length: 2.37m (7.78ft),  Average Daily Traffic: 9,700 (year 2018),  Truck Traffic: 7%,  Average Future Daily Traffic: 14,056 (year 2033),  Design Load: HS 20,  Features Intersected: RR MBTA/BMRR,  Facility Carried by Structure: HWY SCHOOL ST
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 0.756,  Lanes on structure: 2,  Owner: State Highway Agency,  Approaching Roadway Width: 9.7m (31.8ft),  Material/Design: Prestressed concrete,  Design/Construction: Box Beam or Girders - Multiple,  Number Of Spans In Main Unit: 1,  Length of Maximum Span: 22.9m (75.1ft),  Curb or Sidewalk Widths: Left: 1.8m (5.9ft),  Right: 1.8m (5.9ft),  Curb-To-Curb Width: 9.7m (31.8ft),  Out-to-Out Width: 14.0m (45.9ft)

Condition: Deck: Fair,  Superstructure: Fair,  Substructure: Satisfactory,  Operating Rating: 77.9 metric tons,  Method Used To Determine Operating Rating: Load Factor (LF),  Inventory Rating: 57.3 metric tons,  Method Used To Determine Inventory Rating: Load Factor (LF),  Structural Evaluation: Somewhat better than minimum adequacy,  Deck Geometry: Meets minimum limits,  Underclear: High priority of corrective action,  Approach Roadway Alignment: Equal to present desirable criteria,  Length Of Structure Improvement: 2.40m (7.87ft),  Designated Inspection Frequency: Every 24 months,  Inspection Date: January 2022,  Bridge Improvement Cost: $1,320,000,  Roadway Improvement Cost: $133,000,  Total Project Cost: $1,981,000 ( Estimate for 2022),  Deck Structure Type: Concrete Precast Panels,  Wearing Surface/Protective System: Wearing Surface: Latex Concrete,  Membrane: Other,  Deck Protection: Epoxy Coated Reinforcing
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Structure Number: S170093G6DOT634,  Location: 1.3 KM W OF JCT SR28&38 (Lat: 42.389747,  Lng: -71.100531),  Route carried "on" structure: City street ,  Year Built: 1902,  Year Reconstructed: 2006,  Status: Open,  Structure Length: 2.37m (7.78ft),  Average Daily Traffic: 1,160 (year 2018),  Truck Traffic: 11%,  Average Future Daily Traffic: 2,843 (year 2031),  Design Load: HS 20,  Features Intersected: RR MBTA/BMRR,  Facility Carried by Structure: HWY SYCAMORE ST
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 0.193,  Lanes on structure: 1,  Owner: State Highway Agency,  Approaching Roadway Width: 7.9m (25.9ft),  Material/Design: Prestressed concrete,  Design/Construction: Box Beam or Girders - Multiple,  Number Of Spans In Main Unit: 1,  Length of Maximum Span: 22.3m (73.2ft),  Curb or Sidewalk Widths: Left: 2.1m (6.9ft),  Right: 2.1m (6.9ft),  Curb-To-Curb Width: 7.9m (25.9ft),  Out-to-Out Width: 12.9m (42.3ft)

Condition: Deck: Good,  Superstructure: Good,  Substructure: Fair,  Operating Rating: 72.1 metric tons,  Method Used To Determine Operating Rating: Load Factor (LF),  Inventory Rating: 61.1 metric tons,  Method Used To Determine Inventory Rating: Load Factor (LF),  Structural Evaluation: Somewhat better than minimum adequacy,  Deck Geometry: Meets minimum limits,  Underclear: High priority of corrective action,  Approach Roadway Alignment: Better than present minimum criteria,  Length Of Structure Improvement: 2.40m (7.87ft),  Designated Inspection Frequency: Every 24 months,  Inspection Date: November 2020,  Bridge Improvement Cost: $1,217,000,  Roadway Improvement Cost: $122,000,  Total Project Cost: $1,826,000 ( Estimate for 2022),  Deck Structure Type: Concrete Precast Panels,  Wearing Surface/Protective System: Wearing Surface: Bituminous,  Membrane: Built-up,  Deck Protection: Epoxy Coated Reinforcing
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Structure Number: S170103G7DOT634,  Location: 1.6 KM W OF JCT SR28&38 (Lat: 42.390367,  Lng: -71.102039),  Route carried "on" structure: City street ,  Year Built: 1889,  Year Reconstructed: 1985,  Status: Open,  Structure Length: 2.41m (7.91ft),  Average Daily Traffic: 7,600 (year 2016),  Truck Traffic: 5%,  Average Future Daily Traffic: 15,793 (year 2031),  Design Load: HS 20,  Features Intersected: RR MBTA/BMRR,  Facility Carried by Structure: HWY CENTRAL ST
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 0.837,  Lanes on structure: 2,  Owner: State Highway Agency,  Approaching Roadway Width: 8.7m (28.5ft),  Material/Design: Steel,  Design/Construction: Stringer/Multi-beam,  Number Of Spans In Main Unit: 1,  Length of Maximum Span: 20.7m (67.9ft),  Curb or Sidewalk Widths: Left: 1.6m (5.2ft),  Right: 1.6m (5.2ft),  Curb-To-Curb Width: 8.7m (28.5ft),  Out-to-Out Width: 12.4m (40.7ft)

Condition: Deck: Satisfactory,  Superstructure: Good,  Substructure: Satisfactory,  Operating Rating: 75.6 metric tons,  Method Used To Determine Operating Rating: Load Factor (LF),  Inventory Rating: 45.3 metric tons,  Method Used To Determine Inventory Rating: Load Factor (LF),  Structural Evaluation: Equal to present minimum criteria,  Deck Geometry: High priority of replacement,  Underclear: High priority of corrective action,  Approach Roadway Alignment: Equal to present desirable criteria,  Length Of Structure Improvement: 2.50m (8.20ft),  Designated Inspection Frequency: Every 24 months,  Inspection Date: October 2020,  Bridge Improvement Cost: $1,108,000,  Roadway Improvement Cost: $111,000,  Total Project Cost: $1,663,000 ( Estimate for 2022),  Deck Structure Type: Concrete Cast-file-Place,  Wearing Surface/Protective System: Wearing Surface: Bituminous,  Membrane: Built-up,  Deck Protection: Epoxy Coated Reinforcing
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Structure Number: S17011AW2DOT634,  Location: 1.8 KM NW OF JCT SR28&38 (Lat: 42.393186,  Lng: -71.105842),  Route carried "on" structure: City street ,  Year Built: 2006,  Status: Open,  Structure Length: 2.59m (8.50ft),  Average Daily Traffic: 6,077 (year 2018),  Truck Traffic: 4%,  Average Future Daily Traffic: 3,948 (year 2031),  Design Load: HS 20,  Features Intersected: RR MBTA/BMRR,  Facility Carried by Structure: HWY LOWELL ST
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 0.000,  Lanes on structure: 2,  Owner: State Highway Agency,  Approaching Roadway Width: 7.3m (24.0ft),  Skew: 3 degrees,  Material/Design: Prestressed concrete,  Design/Construction: Box Beam or Girders - Multiple,  Number Of Spans In Main Unit: 1,  Length of Maximum Span: 24.5m (80.4ft),  Curb or Sidewalk Widths: Left: 1.8m (5.9ft),  Right: 1.8m (5.9ft),  Curb-To-Curb Width: 7.9m (25.9ft),  Out-to-Out Width: 12.4m (40.7ft)

Condition: Deck: Good,  Superstructure: Good,  Substructure: Good,  Operating Rating: 59.1 metric tons,  Method Used To Determine Operating Rating: Load Factor (LF),  Inventory Rating: 49.6 metric tons,  Method Used To Determine Inventory Rating: Load Factor (LF),  Structural Evaluation: Better than present minimum criteria,  Deck Geometry: High priority of replacement,  Underclear: High priority of corrective action,  Approach Roadway Alignment: Equal to present desirable criteria,  Length Of Structure Improvement: 2.60m (8.53ft),  Designated Inspection Frequency: Every 24 months,  Inspection Date: October 2020,  Bridge Improvement Cost: $1,349,000,  Roadway Improvement Cost: $135,000,  Total Project Cost: $2,024,000 ( Estimate for 2022),  Deck Structure Type: Concrete Cast-file-Place,  Wearing Surface/Protective System: Wearing Surface: Integral Concrete,  Membrane: Other,  Deck Protection: Other
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Structure Number: S17012AE7DOT634,  Location: 1.9 KM NW OF JCT SR28&38 (Lat: 42.397147,  Lng: -71.108889),  Route carried "on" structure: City street ,  Year Built: 1999,  Status: Open,  Structure Length: 2.37m (7.78ft),  Average Daily Traffic: 9,400 (year 2017),  Truck Traffic: 7%,  Average Future Daily Traffic: 13,424 (year 2032),  Design Load: HS 20,  Features Intersected: RR MBTA/BMRR,  Facility Carried by Structure: HWY CEDAR ST
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 0.724,  Lanes on structure: 2,  Owner: State Highway Agency,  Approaching Roadway Width: 7.9m (25.9ft),  Skew: 3 degrees,  Material/Design: Prestressed concrete,  Design/Construction: Box Beam or Girders - Multiple,  Number Of Spans In Main Unit: 1,  Length of Maximum Span: 22.2m (72.8ft),  Curb or Sidewalk Widths: Left: 1.6m (5.2ft),  Right: 1.6m (5.2ft),  Curb-To-Curb Width: 7.9m (25.9ft),  Out-to-Out Width: 11.8m (38.7ft)

Condition: Deck: Satisfactory,  Superstructure: Satisfactory,  Substructure: Fair,  Operating Rating: 68.4 metric tons,  Method Used To Determine Operating Rating: Load Factor (LF),  Inventory Rating: 41.0 metric tons,  Method Used To Determine Inventory Rating: Load Factor (LF),  Structural Evaluation: Somewhat better than minimum adequacy,  Deck Geometry: High priority of replacement,  Underclear: High priority of corrective action,  Approach Roadway Alignment: Better than present minimum criteria,  Length Of Structure Improvement: 2.40m (7.87ft),  Designated Inspection Frequency: Every 24 months,  Inspection Date: October 2021,  Bridge Improvement Cost: $1,113,000,  Roadway Improvement Cost: $112,000,  Total Project Cost: $1,670,000 ( Estimate for 2022),  Deck Structure Type: Concrete Precast Panels,  Wearing Surface/Protective System: Wearing Surface: Bituminous,  Membrane: Built-up,  Deck Protection: Epoxy Coated Reinforcing
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Structure Number: S17013BGEDOTNBI,  Location: 2.4 KM NW OF JCT SR28&38 (Lat: 42.399450,  Lng: -71.110589),  Route carried "on" structure: City street ,  Year Built: 2020,  Status: Open,  Structure Length: 4.57m (14.99ft),  Average Daily Traffic: 28,000 (year 2008),  Truck Traffic: 7%,  Design Load: HL 93,  Features Intersected: RR MBTA/BMRR,  Facility Carried by Structure: HWY BROADWAY
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 3.138,  Lanes on structure: 2,  Owner: State Highway Agency,  Approaching Roadway Width: 21.3m (69.9ft),  Skew: 3 degrees,  Material/Design: Steel continuous,  Design/Construction: Girder and Floorbeam System,  Number Of Spans In Main Unit: 2,  Length of Maximum Span: 28.2m (92.5ft),  Curb or Sidewalk Widths: Left: 3.0m (9.8ft),  Right: 2.7m (8.9ft),  Curb-To-Curb Width: 21.3m (69.9ft),  Out-to-Out Width: 27.0m (88.6ft)

Condition: Deck: Good,  Superstructure: Very good,  Substructure: Very good,  Operating Rating: 42.1 metric tons,  Method Used To Determine Operating Rating: Assigned ratings based on Load and Resistance Factor Design (LRFD) reported by rating factor (RF) using HL93 loadings,  Inventory Rating: 32.4 metric tons,  Method Used To Determine Inventory Rating: Assigned ratings based on Load and Resistance Factor Design (LRFD) reported by rating factor (RF) using HL93 loadings,  Structural Evaluation: Equal to present desirable criteria,  Deck Geometry: Superior to present desirable criteria,  Approach Roadway Alignment: Superior to present desirable criteria,  Designated Inspection Frequency: Every 24 months,  Inspection Date: August 2021,  Deck Structure Type: Concrete Cast-file-Place,  Wearing Surface/Protective System: Wearing Surface: Bituminous
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Structure Number: S170153GGDOT634,  Location: 1.5 MI SW OF JCT SR28&38 (Lat: 42.392778,  Lng: -71.106167),  Route carried "on" structure: City street ,  Year Built: 1910,  Year Reconstructed: 2006,  Status: Open,  Structure Length: 1.46m (4.79ft),  Average Daily Traffic: 6,000 (year 2018),  Truck Traffic: 2%,  Average Future Daily Traffic: 3,948 (year 2031),  Design Load: HS 20,  Features Intersected: RR BMRR SPUR,  Facility Carried by Structure: HWY LOWELL ST
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 0.998,  Lanes on structure: 2,  Owner: State Highway Agency,  Approaching Roadway Width: 7.3m (24.0ft),  Material/Design: Prestressed concrete,  Design/Construction: Box Beam or Girders - Multiple,  Number Of Spans In Main Unit: 1,  Length of Maximum Span: 13.4m (44.0ft),  Curb or Sidewalk Widths: Left: 1.9m (6.2ft),  Right: 1.9m (6.2ft),  Curb-To-Curb Width: 7.2m (23.6ft),  Out-to-Out Width: 12.3m (40.4ft)

Condition: Deck: Good,  Superstructure: Very good,  Substructure: Satisfactory,  Operating Rating: 76.5 metric tons,  Method Used To Determine Operating Rating: Load Factor (LF),  Inventory Rating: 57.5 metric tons,  Method Used To Determine Inventory Rating: Load Factor (LF),  Structural Evaluation: Equal to present minimum criteria,  Deck Geometry: High priority of replacement,  Approach Roadway Alignment: Equal to present desirable criteria,  Length Of Structure Improvement: 1.50m (4.92ft),  Designated Inspection Frequency: Every 24 months,  Inspection Date: October 2020,  Bridge Improvement Cost: $877,000,  Roadway Improvement Cost: $88,000,  Total Project Cost: $1,316,000 ( Estimate for 2022),  Deck Structure Type: Concrete Cast-file-Place,  Wearing Surface/Protective System: Wearing Surface: Monolithic Concrete,  Membrane: Built-up,  Deck Protection: Epoxy Coated Reinforcing
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Structure Number: S170163GFDOT634,  Location: OVER RAILROAD (Lat: 42.377797,  Lng: -71.095817),  Route carried "on" structure: City street ,  Year Built: 1911,  Status: Posted for load,  Structure Length: 2.91m (9.55ft),  Average Daily Traffic: 27,350 (year 2017),  Truck Traffic: 8%,  Average Future Daily Traffic: 17,609 (year 2032),  Features Intersected: RR MBTA/BMRR,  Facility Carried by Structure: HWY WEBSTER AVE
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 0.241,  Lanes on structure: 4,  Owner: State Highway Agency,  Approaching Roadway Width: 8.7m (28.5ft),  Skew: 9 degrees,  Material/Design: Steel,  Design/Construction: Girder and Floorbeam System,  Number Of Spans In Main Unit: 1,  Length of Maximum Span: 27.1m (88.9ft),  Curb or Sidewalk Widths: Left: 1.8m (5.9ft),  Right: 2.3m (7.5ft),  Curb-To-Curb Width: 12.2m (40.0ft),  Out-to-Out Width: 21.0m (68.9ft)

Condition: Deck: Fair,  Superstructure: Serious,  Substructure: Fair,  Operating Rating: 27.3 metric tons,  Method Used To Determine Operating Rating: Load Factor (LF),  Inventory Rating: 17.6 metric tons,  Method Used To Determine Inventory Rating: Load Factor (LF),  Structural Evaluation: High priority of corrective action,  Deck Geometry: High priority of replacement,  Underclear: High priority of replacement,  Approach Roadway Alignment: High priority of corrective action,  Length Of Structure Improvement: 3.90m (12.80ft),  Designated Inspection Frequency: Every 6 months,  Critical Feature Inspection Frequency: Every 24 months,  Other Special Inspection Frequency: Every 6 months,  Inspection Date: September 2021,  Critical Feature Inspection Date: September 2021,  Other Special Inspection Date: September 2021,  Bridge Improvement Cost: $6,313,000,  Roadway Improvement Cost: $632,000,  Total Project Cost: $9,470,000 ( Estimate for 2022),  Deck Structure Type: Concrete Cast-file-Place,  Wearing Surface/Protective System: Wearing Surface: Bituminous
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Structure Number: S170173GEDOT634,  Location: 2.4 KM N OF HARVARD BR. (Lat: 42.379397,  Lng: -71.098783),  Route carried "on" structure: City street ,  Year Built: 1982,  Status: Open,  Structure Length: 1.98m (6.50ft),  Average Daily Traffic: 13,500 (year 2018),  Truck Traffic: 10%,  Average Future Daily Traffic: 48,169 (year 2031),  Design Load: HS 20,  Features Intersected: RR MBTA/BMRR,  Facility Carried by Structure: HWY WASHNGTON ST
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 0.724,  Lanes on structure: 2,  Owner: State Highway Agency,  Approaching Roadway Width: 12.2m (40.0ft),  Skew: 4 degrees,  Material/Design: Steel,  Design/Construction: Girder and Floorbeam System,  Number Of Spans In Main Unit: 1,  Length of Maximum Span: 18.0m (59.1ft),  Curb or Sidewalk Widths: Left: 2.0m (6.6ft),  Right: 1.5m (4.9ft),  Curb-To-Curb Width: 12.2m (40.0ft),  Out-to-Out Width: 18.1m (59.4ft)

Condition: Deck: Satisfactory,  Superstructure: Satisfactory,  Substructure: Fair,  Operating Rating: 67.1 metric tons,  Method Used To Determine Operating Rating: Load Factor (LF),  Inventory Rating: 40.2 metric tons,  Method Used To Determine Inventory Rating: Load Factor (LF),  Structural Evaluation: Somewhat better than minimum adequacy,  Deck Geometry: Somewhat better than minimum adequacy,  Underclear: High priority of corrective action,  Approach Roadway Alignment: Better than present minimum criteria,  Length Of Structure Improvement: 2.00m (6.56ft),  Designated Inspection Frequency: Every 24 months,  Critical Feature Inspection Frequency: Every 24 months,  Inspection Date: October 2020,  Critical Feature Inspection Date: October 2020,  Bridge Improvement Cost: $1,422,000,  Roadway Improvement Cost: $143,000,  Total Project Cost: $2,134,000 ( Estimate for 2022),  Deck Structure Type: Concrete Cast-file-Place,  Wearing Surface/Protective System: Wearing Surface: Bituminous,  Membrane: Built-up,  Deck Protection: Epoxy Coated Reinforcing
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Structure Number: S170183GDDOT634,  Location: 3.2 KM N OF HARVARD BR. (Lat: 42.380936,  Lng: -71.104319),  Route carried "on" structure: City street ,  Year Built: 1913,  Year Reconstructed: 1993,  Status: Open,  Structure Length: 2.33m (7.64ft),  Average Daily Traffic: 10,900 (year 2019),  Truck Traffic: 10%,  Average Future Daily Traffic: 15,319 (year 2032),  Design Load: HS 20,  Features Intersected: RR MBTA/BMRR,  Facility Carried by Structure: HWY DANE ST
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 0.209,  Lanes on structure: 2,  Owner: State Highway Agency,  Approaching Roadway Width: 8.2m (26.9ft),  Material/Design: Prestressed concrete,  Design/Construction: Box Beam or Girders - Multiple,  Number Of Spans In Main Unit: 1,  Length of Maximum Span: 22.4m (73.5ft),  Curb or Sidewalk Widths: Left: 1.9m (6.2ft),  Right: 1.5m (4.9ft),  Curb-To-Curb Width: 8.5m (27.9ft),  Out-to-Out Width: 13.0m (42.7ft)

Condition: Deck: Satisfactory,  Superstructure: Satisfactory,  Substructure: Fair,  Operating Rating: 72.0 metric tons,  Method Used To Determine Operating Rating: Allowable Stress (AS),  Inventory Rating: 48.1 metric tons,  Method Used To Determine Inventory Rating: Allowable Stress (AS),  Structural Evaluation: Somewhat better than minimum adequacy,  Deck Geometry: High priority of replacement,  Underclear: High priority of corrective action,  Approach Roadway Alignment: Better than present minimum criteria,  Length Of Structure Improvement: 2.40m (7.87ft),  Designated Inspection Frequency: Every 24 months,  Inspection Date: October 2021,  Bridge Improvement Cost: $1,226,000,  Roadway Improvement Cost: $123,000,  Total Project Cost: $1,840,000 ( Estimate for 2022),  Deck Structure Type: Concrete Precast Panels,  Wearing Surface/Protective System: Wearing Surface: Bituminous,  Membrane: Built-up,  Deck Protection: Epoxy Coated Reinforcing
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Structure Number: S170193GCDOT634,  Location: 305 M E OF SR2A (Lat: 42.386756,  Lng: -71.116239),  Route carried "on" structure: City street ,  Year Built: 1899,  Year Reconstructed: 1992,  Status: Open,  Structure Length: 1.97m (6.46ft),  Average Daily Traffic: 13,250 (year 2018),  Truck Traffic: 8%,  Average Future Daily Traffic: 16,519 (year 2031),  Design Load: HS 20,  Features Intersected: RR MBTA/BMRR,  Facility Carried by Structure: HWY BEACON ST
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 1.625,  Lanes on structure: 3,  Base Highway Network: Yes,  Owner: State Highway Agency,  Approaching Roadway Width: 19.5m (64.0ft),  Skew: 3 degrees,  Material/Design: Steel,  Design/Construction: Frame,  Number Of Spans In Main Unit: 1,  Length of Maximum Span: 18.5m (60.7ft),  Curb or Sidewalk Widths: Left: 3.0m (9.8ft),  Right: 3.0m (9.8ft),  Curb-To-Curb Width: 15.2m (49.9ft),  Out-to-Out Width: 21.9m (71.9ft)

Condition: Deck: Good,  Superstructure: Satisfactory,  Substructure: Satisfactory,  Operating Rating: 60.3 metric tons,  Method Used To Determine Operating Rating: Load Factor (LF),  Inventory Rating: 36.3 metric tons,  Method Used To Determine Inventory Rating: Load Factor (LF),  Structural Evaluation: Equal to present minimum criteria,  Deck Geometry: Equal to present minimum criteria,  Underclear: High priority of corrective action,  Approach Roadway Alignment: Equal to present minimum criteria,  Length Of Structure Improvement: 2.00m (6.56ft),  Designated Inspection Frequency: Every 24 months,  Inspection Date: May 2020,  Bridge Improvement Cost: $604,000,  Roadway Improvement Cost: $61,000,  Total Project Cost: $907,000 ( Estimate for 2022),  Deck Structure Type: Concrete Cast-file-Place,  Wearing Surface/Protective System: Wearing Surface: Bituminous,  Membrane: Built-up,  Deck Protection: Epoxy Coated Reinforcing
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Structure Number: S170203GBDOT634,  Location: 1.5 MI N OF HARVARD BR. (Lat: 42.377472,  Lng: -71.095219),  Route carried "on" structure: City street ,  Year Built: 1933,  Year Reconstructed: 1984,  Status: Open,  Structure Length: 1.22m (4.00ft),  Average Daily Traffic: 14,900 (year 2018),  Truck Traffic: 11%,  Average Future Daily Traffic: 32,534 (year 2033),  Design Load: HS 20,  Features Intersected: RR MBTA/BMRR,  Facility Carried by Structure: HWY PROSPECT ST
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 0.000,  Lanes on structure: 2,  Base Highway Network: Yes,  Owner: State Highway Agency,  Approaching Roadway Width: 11.0m (36.1ft),  Material/Design: Prestressed concrete,  Design/Construction: Box Beam or Girders - Multiple,  Number Of Spans In Main Unit: 1,  Length of Maximum Span: 11.9m (39.0ft),  Curb or Sidewalk Widths: Left: 1.5m (4.9ft),  Right: 1.5m (4.9ft),  Curb-To-Curb Width: 11.0m (36.1ft),  Out-to-Out Width: 14.9m (48.9ft)

Condition: Deck: Fair,  Superstructure: Fair,  Substructure: Satisfactory,  Operating Rating: 77.4 metric tons,  Method Used To Determine Operating Rating: Allowable Stress (AS),  Inventory Rating: 45.4 metric tons,  Method Used To Determine Inventory Rating: Allowable Stress (AS),  Structural Evaluation: Somewhat better than minimum adequacy,  Deck Geometry: Equal to present minimum criteria,  Underclear: High priority of corrective action,  Approach Roadway Alignment: Superior to present desirable criteria,  Length Of Structure Improvement: 1.30m (4.27ft),  Designated Inspection Frequency: Every 24 months,  Inspection Date: January 2022,  Bridge Improvement Cost: $761,000,  Roadway Improvement Cost: $77,000,  Total Project Cost: $1,142,000 ( Estimate for 2022),  Deck Structure Type: Concrete Precast Panels,  Wearing Surface/Protective System: Wearing Surface: Bituminous,  Membrane: Preformed Fabric,  Deck Protection: Epoxy Coated Reinforcing
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Structure Number: S170224E2DOTNBI,  Location: .1 MI S OF PEARL ST (Lat: 42.384383,  Lng: -71.091389),  Route carried "on" structure: State highway 28,  Year Built: 1926,  Year Reconstructed: 1983,  Status: Temporarily open,  Structure Length: 5.30m (17.39ft),  Average Daily Traffic: 53,800 (year 2017),  Truck Traffic: 4%,  Average Future Daily Traffic: 59,540 (year 2031),  Design Load: H 20,  Features Intersected: RR MBTA/BMRR
Minimum Vertical Clearance: 4.57m (14.99ft),  Kilometerpoint: 200.128,  Lanes on structure: 6,  Base Highway Network: Yes,  Owner: State Highway Agency,  Approaching Roadway Width: 25.6m (84.0ft),  Skew: 34 degrees,  Material/Design: Steel,  Design/Construction: Truss - Thru,  Number Of Spans In Main Unit: 1,  Length of Maximum Span: 52.3m (171.6ft),  Curb or Sidewalk Widths: Left: 2.4m (7.9ft),  Right: 2.4m (7.9ft),  Curb-To-Curb Width: 24.4m (80.1ft),  Out-to-Out Width: 32.9m (107.9ft)

Condition: Deck: Satisfactory,  Superstructure: Poor,  Substructure: Fair,  Operating Rating: 10.8 metric tons,  Method Used To Determine Operating Rating: Load Factor (LF),  Inventory Rating: 6.4 metric tons,  Method Used To Determine Inventory Rating: Load Factor (LF),  Structural Evaluation: High priority of replacement,  Deck Geometry: Somewhat better than minimum adequacy,  Underclear: High priority of replacement,  Approach Roadway Alignment: Somewhat better than minimum adequacy,  Bridge Posting: Required (Relationship of Operating Rating to Maximum Legal Load: > 39.9% below),  Length Of Structure Improvement: 6.40m (21.00ft),  Designated Inspection Frequency: Every 12 months,  Critical Feature Inspection Frequency: Every 24 months,  Other Special Inspection Frequency: Every 12 months,  Inspection Date: January 2021,  Critical Feature Inspection Date: January 2021,  Other Special Inspection Date: January 2022,  Bridge Improvement Cost: $12,739,000,  Roadway Improvement Cost: $1,274,000,  Total Project Cost: $19,109,000 ( Estimate for 2022),  Deck Structure Type: Concrete Cast-file-Place,  Wearing Surface/Protective System: Wearing Surface: Bituminous
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Structure Number: S170244E3DOTNBI,  Location: .1 MI S OF MEDFORD ST (Lat: 42.375444,  Lng: -71.085597),  Route carried "on" structure: State highway 28,  Year Built: 1958,  Year Reconstructed: 1983,  Status: Temporarily open,  Structure Length: 12.19m (39.99ft),  Average Daily Traffic: 32,700 (year 2019),  Truck Traffic: 10%,  Average Future Daily Traffic: 82,124 (year 2032),  Design Load: H 20,  Features Intersected: COMB POPLAR ST & MBTA
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 0.000,  Lanes on structure: 6,  Lanes under structure: 1,  Base Highway Network: Yes,  Owner: State Highway Agency,  Approaching Roadway Width: 11.0m (36.1ft),  Skew: 20 degrees,  Material/Design: Steel,  Design/Construction: Girder and Floorbeam System,  Number Of Spans In Main Unit: 4,  Number Of Approach Spans: 27,  Length of Maximum Span: 38.4m (126.0ft),  Curb or Sidewalk Widths: Left: 1.7m (5.6ft),  Right: 1.7m (5.6ft),  Curb-To-Curb Width: 21.9m (71.9ft),  Out-to-Out Width: 26.8m (87.9ft)

Condition: Deck: Fair,  Superstructure: Poor,  Substructure: Poor,  Structural Evaluation: High priority of replacement,  Deck Geometry: High priority of replacement,  Underclear: High priority of replacement,  Approach Roadway Alignment: Equal to present desirable criteria,  Length Of Structure Improvement: 13.10m (42.98ft),  Designated Inspection Frequency: Every 12 months,  Critical Feature Inspection Frequency: Every 24 months,  Other Special Inspection Frequency: Every 12 months,  Inspection Date: July 2021,  Critical Feature Inspection Date: July 2021,  Other Special Inspection Date: July 2021,  Bridge Improvement Cost: $23,605,000,  Roadway Improvement Cost: $2,361,000,  Total Project Cost: $35,408,000 ( Estimate for 2022),  Deck Structure Type: Concrete Cast-file-Place,  Wearing Surface/Protective System: Wearing Surface: Bituminous
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Structure Number: S17025BDWDOTNBI,  Location: .1 MI S OF EVERETT AVE (Lat: 42.385167,  Lng: -71.091014),  Route carried "on" structure: State highway 28,  Year Built: 2016,  Status: Open,  Structure Length: 1.42m (4.66ft),  Average Daily Traffic: 45,425 (year 2016),  Truck Traffic: 10%,  Design Load: HL 93,  Features Intersected: HWY GILMAN ST
Minimum Vertical Clearance: 4.57m (14.99ft),  Kilometerpoint: 200.189,  Lanes on structure: 6,  Lanes under structure: 2,  Owner: State Highway Agency,  Approaching Roadway Width: 27.3m (89.6ft),  Skew: 22 degrees,  Material/Design: Steel,  Design/Construction: Stringer/Multi-beam,  Number Of Spans In Main Unit: 1,  Length of Maximum Span: 12.9m (42.3ft),  Curb or Sidewalk Widths: Left: 2.3m (7.5ft),  Right: 2.3m (7.5ft),  Curb-To-Curb Width: 27.3m (89.6ft),  Out-to-Out Width: 33.4m (109.6ft)

Condition: Deck: Good,  Superstructure: Good,  Substructure: Good,  Operating Rating: 42.1 metric tons,  Method Used To Determine Operating Rating: Assigned ratings based on Load and Resistance Factor Design (LRFD) reported by rating factor (RF) using HL93 loadings,  Inventory Rating: 32.4 metric tons,  Method Used To Determine Inventory Rating: Assigned ratings based on Load and Resistance Factor Design (LRFD) reported by rating factor (RF) using HL93 loadings,  Structural Evaluation: Better than present minimum criteria,  Deck Geometry: Better than present minimum criteria,  Underclear: High priority of corrective action,  Approach Roadway Alignment: Equal to present desirable criteria,  Designated Inspection Frequency: Every 24 months,  Inspection Date: November 2020,  Deck Structure Type: Concrete Precast Panels,  Wearing Surface/Protective System: Wearing Surface: Bituminous,  Deck Protection: Epoxy Coated Reinforcing
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Structure Number: S170293BNDOTNBI,  Location: .8 KM S OF JCT 193&SR16 (Lat: 42.397425,  Lng: -71.091064),  Route carried "on" structure: Interstate 93,  Year Built: 1973,  Status: Open,  Structure Length: 2.62m (8.60ft),  Average Daily Traffic: 147,366 (year 2020),  Truck Traffic: 10%,  Average Future Daily Traffic: 221,102 (year 2031),  Design Load: HS 20,  Features Intersected: HWY SHORE DR
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 0.000,  Lanes on structure: 8,  Lanes under structure: 2,  Base Highway Network: Yes,  Owner: State Highway Agency,  Approaching Roadway Width: 40.8m (133.9ft),  Skew: 20 degrees,  Material/Design: Steel,  Design/Construction: Stringer/Multi-beam,  Number Of Spans In Main Unit: 1,  Length of Maximum Span: 25.0m (82.0ft),  Curb-To-Curb Width: 40.7m (133.5ft),  Out-to-Out Width: 42.4m (139.1ft)

Condition: Deck: Fair,  Superstructure: Satisfactory,  Substructure: Good,  Operating Rating: 57.3 metric tons,  Method Used To Determine Operating Rating: Load Factor (LF),  Inventory Rating: 34.3 metric tons,  Method Used To Determine Inventory Rating: Load Factor (LF),  Structural Evaluation: Equal to present minimum criteria,  Deck Geometry: Superior to present desirable criteria,  Underclear: High priority of corrective action,  Approach Roadway Alignment: Equal to present desirable criteria,  Length Of Structure Improvement: 2.70m (8.86ft),  Designated Inspection Frequency: Every 24 months,  Inspection Date: August 2020,  Bridge Improvement Cost: $2,159,000,  Roadway Improvement Cost: $216,000,  Total Project Cost: $3,239,000 ( Estimate for 2022),  Deck Structure Type: Concrete Cast-file-Place,  Wearing Surface/Protective System: Wearing Surface: Bituminous,  Membrane: Preformed Fabric,  Deck Protection: Epoxy Coated Reinforcing
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Structure Number: S170313BHDOTNBI,  Location: 3.2 KM N OF JCT I93&US1 (Lat: 42.393708,  Lng: -71.085833),  Route carried "on" structure: Interstate 93,  Year Built: 1973,  Status: Temporarily open,  Structure Length: 71.69m (235.20ft),  Average Daily Traffic: 203,588 (year 2018),  Truck Traffic: 12%,  Average Future Daily Traffic: 228,998 (year 2032),  Design Load: HS 20+Mod,  Features Intersected: ST 28 & ST38 & TEMPLE ST
Minimum Vertical Clearance: 4.65m (15.26ft),  Kilometerpoint: 0.000,  Lanes on structure: 8,  Lanes under structure: 11,  Base Highway Network: Yes,  Owner: State Highway Agency,  Approaching Roadway Width: 38.1m (125.0ft),  Skew: 30 degrees,  Material/Design: Steel continuous,  Design/Construction: Stringer/Multi-beam,  Number Of Spans In Main Unit: 28,  Length of Maximum Span: 32.6m (107.0ft),  Curb-To-Curb Width: 37.9m (124.3ft),  Out-to-Out Width: 42.4m (139.1ft)

Condition: Deck: Fair,  Superstructure: Fair,  Substructure: Fair,  Operating Rating: 43.5 metric tons,  Method Used To Determine Operating Rating: Load Factor (LF),  Inventory Rating: 26.0 metric tons,  Method Used To Determine Inventory Rating: Load Factor (LF),  Structural Evaluation: Somewhat better than minimum adequacy,  Deck Geometry: High priority of corrective action,  Underclear: High priority of corrective action,  Approach Roadway Alignment: Equal to present desirable criteria,  Length Of Structure Improvement: 71.70m (235.24ft),  Designated Inspection Frequency: Every 24 months,  Critical Feature Inspection Frequency: Every 24 months,  Inspection Date: April 2021,  Critical Feature Inspection Date: April 2021,  Bridge Improvement Cost: $119,415,000,  Roadway Improvement Cost: $11,942,000,  Total Project Cost: $179,123,000 ( Estimate for 2022),  Deck Structure Type: Concrete Cast-file-Place,  Wearing Surface/Protective System: Wearing Surface: Bituminous,  Membrane: Built-up,  Deck Protection: Other Coated Reinforcing
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Structure Number: S170333BLDOTNBI,  Location: 3.2 KM N OF JCT I93&US1 (Lat: 42.392556,  Lng: -71.084200),  Route carried "on" structure: Ramp Interstate 93,  Year Built: 1973,  Status: Open,  Structure Length: 15.18m (49.80ft),  Average Daily Traffic: 21,700 (year 2020),  Truck Traffic: 8%,  Average Future Daily Traffic: 12,003 (year 2031),  Design Load: H 20,  Features Intersected: OTHER PEDESTRIAN
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 0.000,  Lanes on structure: 1,  Base Highway Network: Yes,  Owner: State Highway Agency,  Approaching Roadway Width: 7.3m (24.0ft),  Material/Design: Steel,  Design/Construction: Stringer/Multi-beam,  Number Of Spans In Main Unit: 6,  Length of Maximum Span: 26.2m (86.0ft),  Curb-To-Curb Width: 7.2m (23.6ft),  Out-to-Out Width: 8.8m (28.9ft)

Condition: Deck: Satisfactory,  Superstructure: Fair,  Substructure: Fair,  Operating Rating: 98.2 metric tons,  Method Used To Determine Operating Rating: Load Factor (LF),  Inventory Rating: 58.6 metric tons,  Method Used To Determine Inventory Rating: Load Factor (LF),  Structural Evaluation: Somewhat better than minimum adequacy,  Deck Geometry: Equal to present minimum criteria,  Approach Roadway Alignment: Equal to present desirable criteria,  Length Of Structure Improvement: 15.20m (49.87ft),  Designated Inspection Frequency: Every 24 months,  Critical Feature Inspection Frequency: Every 24 months,  Inspection Date: May 2020,  Critical Feature Inspection Date: May 2020,  Bridge Improvement Cost: $5,255,000,  Roadway Improvement Cost: $526,000,  Total Project Cost: $7,883,000 ( Estimate for 2022),  Deck Structure Type: Concrete Cast-file-Place,  Wearing Surface/Protective System: Wearing Surface: Bituminous,  Membrane: Built-up
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Structure Number: S170353BJDOTNBI,  Location: 3.2 KM N OF JCT I93&US1 (Lat: 42.391894,  Lng: -71.084539),  Route carried "on" structure: Ramp Interstate 93,  Year Built: 1973,  Status: Open,  Structure Length: 17.62m (57.81ft),  Average Daily Traffic: 13,700 (year 2018),  Truck Traffic: 9%,  Average Future Daily Traffic: 18,794 (year 2031),  Design Load: H 20,  Features Intersected: I 93 CONNECTORS
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 0.000,  Lanes on structure: 1,  Lanes under structure: 4,  Base Highway Network: Yes,  Owner: State Highway Agency,  Approaching Roadway Width: 7.3m (24.0ft),  Material/Design: Steel continuous,  Design/Construction: Stringer/Multi-beam,  Number Of Spans In Main Unit: 7,  Length of Maximum Span: 32.9m (107.9ft),  Curb-To-Curb Width: 7.2m (23.6ft),  Out-to-Out Width: 8.8m (28.9ft)

Condition: Deck: Satisfactory,  Superstructure: Satisfactory,  Substructure: Satisfactory,  Operating Rating: 39.0 metric tons,  Method Used To Determine Operating Rating: Load Factor (LF),  Inventory Rating: 23.4 metric tons,  Method Used To Determine Inventory Rating: Load Factor (LF),  Structural Evaluation: Somewhat better than minimum adequacy,  Deck Geometry: Equal to present minimum criteria,  Underclear: High priority of corrective action,  Approach Roadway Alignment: Equal to present desirable criteria,  Length Of Structure Improvement: 17.70m (58.07ft),  Designated Inspection Frequency: Every 24 months,  Critical Feature Inspection Frequency: Every 24 months,  Inspection Date: May 2020,  Critical Feature Inspection Date: May 2020,  Bridge Improvement Cost: $6,119,000,  Roadway Improvement Cost: $612,000,  Total Project Cost: $9,179,000 ( Estimate for 2022),  Deck Structure Type: Concrete Cast-file-Place,  Wearing Surface/Protective System: Wearing Surface: Bituminous,  Membrane: Built-up
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Structure Number: S170363BKDOTNBI,  Location: 3.2 KM N OF JCT I93&US1 (Lat: 42.391778,  Lng: -71.083472),  Route carried "on" structure: Ramp Interstate 93,  Year Built: 1973,  Status: Open,  Structure Length: 11.34m (37.20ft),  Average Daily Traffic: 13,603 (year 2019),  Truck Traffic: 6%,  Average Future Daily Traffic: 19,267 (year 2031),  Design Load: H 20,  Features Intersected: ST 38 NB/MYSTIC AVE
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 0.000,  Lanes on structure: 1,  Lanes under structure: 3,  Base Highway Network: Yes,  Owner: State Highway Agency,  Approaching Roadway Width: 8.8m (28.9ft),  Material/Design: Steel,  Design/Construction: Stringer/Multi-beam,  Number Of Spans In Main Unit: 5,  Length of Maximum Span: 24.4m (80.1ft),  Curb or Sidewalk Widths: Left: 0.0m,  Right: 0.5m (1.6ft),  Curb-To-Curb Width: 8.8m (28.9ft),  Out-to-Out Width: 11.7m (38.4ft)

Condition: Deck: Fair,  Superstructure: Poor,  Substructure: Fair,  Operating Rating: 52.7 metric tons,  Method Used To Determine Operating Rating: Load Factor (LF),  Inventory Rating: 31.6 metric tons,  Method Used To Determine Inventory Rating: Load Factor (LF),  Structural Evaluation: Meets minimum limits,  Deck Geometry: Superior to present desirable criteria,  Underclear: High priority of replacement,  Approach Roadway Alignment: Equal to present minimum criteria,  Length Of Structure Improvement: 12.30m (40.35ft),  Designated Inspection Frequency: Every 12 months,  Critical Feature Inspection Frequency: Every 24 months,  Other Special Inspection Frequency: Every 12 months,  Inspection Date: August 2020,  Critical Feature Inspection Date: August 2020,  Other Special Inspection Date: August 2021,  Bridge Improvement Cost: $6,959,000,  Roadway Improvement Cost: $696,000,  Total Project Cost: $10,439,000 ( Estimate for 2022),  Deck Structure Type: Concrete Cast-file-Place,  Wearing Surface/Protective System: Wearing Surface: Bituminous,  Membrane: Preformed Fabric,  Deck Protection: Epoxy Coated Reinforcing
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Structure Number: S170373A4DOTNBI,  Location: .16 KM S OF JCT SR28&ST38 (Lat: 42.386653,  Lng: -71.078464),  Route carried "on" structure: State highway 38,  Year Built: 1973,  Status: Open,  Structure Length: 5.64m (18.50ft),  Average Daily Traffic: 21,400 (year 2021),  Truck Traffic: 10%,  Average Future Daily Traffic: 32,534 (year 2032),  Design Load: H 20,  Features Intersected: HWY CONNECTOR RAMP D&K
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 0.000,  Lanes on structure: 2,  Lanes under structure: 5,  Owner: State Highway Agency,  Approaching Roadway Width: 9.1m (29.9ft),  Skew: 9 degrees,  Material/Design: Steel,  Design/Construction: Stringer/Multi-beam,  Number Of Spans In Main Unit: 2,  Length of Maximum Span: 27.4m (89.9ft),  Curb-To-Curb Width: 9.0m (29.5ft),  Out-to-Out Width: 10.7m (35.1ft)

Condition: Deck: Good,  Superstructure: Good,  Substructure: Satisfactory,  Operating Rating: 53.9 metric tons,  Method Used To Determine Operating Rating: Load Factor (LF),  Inventory Rating: 32.3 metric tons,  Method Used To Determine Inventory Rating: Load Factor (LF),  Structural Evaluation: Equal to present minimum criteria,  Deck Geometry: High priority of corrective action,  Underclear: Meets minimum limits,  Approach Roadway Alignment: Equal to present desirable criteria,  Length Of Structure Improvement: 5.70m (18.70ft),  Designated Inspection Frequency: Every 24 months,  Inspection Date: March 2021,  Bridge Improvement Cost: $2,396,000,  Roadway Improvement Cost: $240,000,  Total Project Cost: $3,595,000 ( Estimate for 2022),  Deck Structure Type: Concrete Cast-file-Place,  Wearing Surface/Protective System: Wearing Surface: Bituminous,  Membrane: Preformed Fabric
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Structure Number: S170394E5DOTNBI,  Location: .1 MI W OF ALLSTON ST (Lat: 42.380244,  Lng: -71.089744),  Route carried "on" structure: State highway 28,  Year Built: 1951,  Year Reconstructed: 1983,  Status: Open,  Structure Length: 19.81m (64.99ft),  Average Daily Traffic: 17,849 (year 2021),  Truck Traffic: 10%,  Average Future Daily Traffic: 6,317 (year 2033),  Design Load: HS 20,  Features Intersected: HWY WASHINGTON ST
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 0.016,  Lanes on structure: 4,  Lanes under structure: 6,  Base Highway Network: Yes,  Owner: State Highway Agency,  Approaching Roadway Width: 17.2m (56.4ft),  Skew: 30 degrees,  Material/Design: Steel,  Design/Construction: Stringer/Multi-beam,  Number Of Spans In Main Unit: 9,  Length of Maximum Span: 22.5m (73.8ft),  Curb or Sidewalk Widths: Left: 0.6m (2.0ft),  Right: 0.6m (2.0ft),  Curb-To-Curb Width: 17.2m (56.4ft),  Out-to-Out Width: 20.9m (68.6ft)

Condition: Deck: Satisfactory,  Superstructure: Satisfactory,  Substructure: Satisfactory,  Operating Rating: 45.1 metric tons,  Method Used To Determine Operating Rating: Load Factor (LF),  Inventory Rating: 32.4 metric tons,  Method Used To Determine Inventory Rating: Load Factor (LF),  Structural Evaluation: Equal to present minimum criteria,  Deck Geometry: Meets minimum limits,  Underclear: High priority of corrective action,  Approach Roadway Alignment: Equal to present desirable criteria,  Length Of Structure Improvement: 19.90m (65.29ft),  Designated Inspection Frequency: Every 24 months,  Critical Feature Inspection Frequency: Every 24 months,  Inspection Date: January 2022,  Critical Feature Inspection Date: January 2022,  Bridge Improvement Cost: $9,194,000,  Roadway Improvement Cost: $920,000,  Total Project Cost: $13,792,000 ( Estimate for 2022),  Deck Structure Type: Concrete Cast-file-Place,  Wearing Surface/Protective System: Wearing Surface: Bituminous
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Structure Number: S170394E6DOTNBI,  Location: .1 MI W OF ALLSTON ST (Lat: 42.377378,  Lng: -71.088789),  Route carried "on" structure: State highway 28,  Year Built: 1951,  Year Reconstructed: 2015,  Status: Temporarily open,  Structure Length: 23.59m (77.40ft),  Average Daily Traffic: 18,135 (year 2020),  Truck Traffic: 10%,  Average Future Daily Traffic: 25,269 (year 2033),  Design Load: HS 20,  Features Intersected: HWY MEDFORD ST
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 0.016,  Lanes on structure: 2,  Lanes under structure: 6,  Base Highway Network: Yes,  Owner: State Highway Agency,  Approaching Roadway Width: 8.5m (27.9ft),  Material/Design: Steel,  Design/Construction: Stringer/Multi-beam,  Number Of Spans In Main Unit: 13,  Number Of Approach Spans: 1,  Length of Maximum Span: 27.5m (90.2ft),  Curb or Sidewalk Widths: Left: 0.6m (2.0ft),  Right: 0.6m (2.0ft),  Curb-To-Curb Width: 8.5m (27.9ft),  Out-to-Out Width: 10.4m (34.1ft)

Condition: Deck: Satisfactory,  Superstructure: Satisfactory,  Substructure: Satisfactory,  Operating Rating: 60.0 metric tons,  Method Used To Determine Operating Rating: Load Factor (LF),  Inventory Rating: 35.9 metric tons,  Method Used To Determine Inventory Rating: Load Factor (LF),  Structural Evaluation: Equal to present minimum criteria,  Deck Geometry: High priority of corrective action,  Underclear: High priority of corrective action,  Approach Roadway Alignment: Equal to present desirable criteria,  Designated Inspection Frequency: Every 24 months,  Critical Feature Inspection Frequency: Every 24 months,  Inspection Date: Febuary 2022,  Critical Feature Inspection Date: Febuary 2022,  Deck Structure Type: Concrete Cast-file-Place,  Wearing Surface/Protective System: Wearing Surface: Bituminous
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