Bridge Statistics for Durham, New Hampshire (NH)
Condition, Traffic, Stress, Structural Evaluation, Project Costs

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Structure Number: 7000740013,  Location: .5 MI. FROM LEE T.L. (Lat: 43.145303,  Lng: -70.956211),  Route carried "on" structure: US 4,  Year Built: 1968,  Year Reconstructed: 2014,  Status: Open,  Structure Length: 2.53m (8.30ft),  Average Daily Traffic: 11,113 (year 2020),  Truck Traffic: 7%,  Average Future Daily Traffic: 16,447 (year 2042),  Design Load: HS 20,  Features Intersected: NH155A
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 153.350,  Lanes on structure: 2,  Lanes under structure: 2,  Base Highway Network: Yes,  Owner: State Highway Agency,  Approaching Roadway Width: 13.4m (44.0ft),  Skew: 2 degrees,  Material/Design: Steel,  Design/Construction: Stringer/Multi-beam,  Number Of Spans In Main Unit: 1,  Length of Maximum Span: 23.8m (78.1ft),  Curb or Sidewalk Widths: Left: 0.2m (0.7ft),  Right: 0.2m (0.7ft),  Curb-To-Curb Width: 13.7m (44.9ft),  Out-to-Out Width: 15.2m (49.9ft)

Condition: Deck: Satisfactory,  Superstructure: Fair,  Substructure: Satisfactory,  Operating Rating: 66.8 metric tons,  Method Used To Determine Operating Rating: Load Factor (LF),  Inventory Rating: 45.5 metric tons,  Method Used To Determine Inventory Rating: Load Factor (LF),  Structural Evaluation: Somewhat better than minimum adequacy,  Deck Geometry: Superior to present desirable criteria,  Underclear: High priority of replacement,  Approach Roadway Alignment: Equal to present desirable criteria,  Length Of Structure Improvement: 2.53m (8.30ft),  Designated Inspection Frequency: Every 24 months,  Inspection Date: June 2020,  Bridge Improvement Cost: $2,718,000,  Roadway Improvement Cost: $200,000,  Total Project Cost: $3,142,000 ( 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: 70009200107,  Location: TOWN RD (Lat: 43.128625,  Lng: -70.938889),  Route carried "on" structure: Other road ,  Year Built: 1973,  Status: Open,  Structure Length: 1.13m (3.71ft),  Average Daily Traffic: 1,854 (year 2020),  Truck Traffic: 10%,  Average Future Daily Traffic: 2,743 (year 2042),  Design Load: HS 20,  Features Intersected: PAR,  Facility Carried by Structure: MILL ROAD
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 2.717,  Lanes on structure: 2,  Owner: City or Municipal Highway Agency,  Approaching Roadway Width: 7.3m (24.0ft),  Material/Design: Prestressed concrete,  Design/Construction: Slab,  Number Of Spans In Main Unit: 1,  Length of Maximum Span: 8.2m (26.9ft),  Curb or Sidewalk Widths: Left: 0.5m (1.6ft),  Right: 1.5m (4.9ft),  Curb-To-Curb Width: 7.3m (24.0ft),  Out-to-Out Width: 10.1m (33.1ft)

Condition: Deck: Satisfactory,  Superstructure: Satisfactory,  Substructure: Satisfactory,  Operating Rating: 54.5 metric tons,  Method Used To Determine Operating Rating: Load Factor (LF),  Inventory Rating: 32.7 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 replacement,  Approach Roadway Alignment: Better than present minimum criteria,  Length Of Structure Improvement: 1.13m (3.71ft),  Designated Inspection Frequency: Every 24 months,  Inspection Date: September 2021,  Bridge Improvement Cost: $2,718,000,  Roadway Improvement Cost: $200,000,  Total Project Cost: $3,142,000 ( Estimate for 2022),  Deck Structure Type: Concrete Precast Panels,  Wearing Surface/Protective System: Wearing Surface: Bituminous,  Membrane: Preformed Fabric

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Structure Number: 7000930008,  Location: 0.9MI. RTE 108 (Lat: 43.109122,  Lng: -70.939719),  Route carried "on" structure: Other road ,  Year Built: 1910,  Year Reconstructed: 2020,  Status: Posted for load,  Structure Length: 1.02m (3.35ft),  Average Daily Traffic: 445 (year 2020),  Truck Traffic: 4%,  Average Future Daily Traffic: 658 (year 2042),  Features Intersected: PAR,  Facility Carried by Structure: BENNETT ROAD
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 1.255,  Lanes on structure: 2,  Owner: State Highway Agency,  Approaching Roadway Width: 6.1m (20.0ft),  Skew: 2 degrees,  Material/Design: Wood or Timber,  Design/Construction: Stringer/Multi-beam,  Number Of Spans In Main Unit: 1,  Length of Maximum Span: 9.4m (30.8ft),  Curb-To-Curb Width: 6.2m (20.3ft),  Out-to-Out Width: 6.6m (21.7ft)

Condition: Deck: Very good,  Superstructure: Satisfactory,  Substructure: Fair,  Operating Rating: 17.2 metric tons,  Method Used To Determine Operating Rating: Allowable Stress (AS),  Inventory Rating: 12.7 metric tons,  Method Used To Determine Inventory Rating: Allowable Stress (AS),  Structural Evaluation: Meets minimum limits,  Deck Geometry: High priority of corrective action,  Underclear: High priority of replacement,  Approach Roadway Alignment: Somewhat better than minimum adequacy,  Bridge Posting: Required (Relationship of Operating Rating to Maximum Legal Load: 30.0 - 39.9% below),  Length Of Structure Improvement: 1.02m (3.35ft),  Designated Inspection Frequency: Every 24 months,  Inspection Date: November 2020,  Bridge Improvement Cost: $2,718,000,  Roadway Improvement Cost: $200,000,  Total Project Cost: $3,142,000 ( Estimate for 2022),  Deck Structure Type: Wood or Timber

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Structure Number: 70009500121,  Location: 1.6 MI SE LEE T.L. (Lat: 43.138958,  Lng: -70.936350),  Route carried "on" structure: City street ,  Year Built: 1936,  Status: Open,  Structure Length: 1.31m (4.30ft),  Average Daily Traffic: 8,437 (year 2020),  Truck Traffic: 5%,  Average Future Daily Traffic: 12,486 (year 2042),  Design Load: H 15,  Features Intersected: PAR,PEDESTRIAN,  Facility Carried by Structure: MAIN STREET
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 2.493,  Lanes on structure: 2,  Owner: City or Municipal Highway Agency,  Approaching Roadway Width: 10.4m (34.1ft),  Skew: 2 degrees,  Material/Design: Concrete,  Design/Construction: Frame,  Number Of Spans In Main Unit: 1,  Length of Maximum Span: 11.3m (37.1ft),  Curb or Sidewalk Widths: Left: 3.0m (9.8ft),  Right: 1.8m (5.9ft),  Curb-To-Curb Width: 10.4m (34.1ft),  Out-to-Out Width: 16.2m (53.1ft)

Condition: Deck: Satisfactory,  Superstructure: Satisfactory,  Substructure: Satisfactory,  Operating Rating: 63.7 metric tons,  Method Used To Determine Operating Rating: Allowable Stress (AS),  Inventory Rating: 45.9 metric tons,  Method Used To Determine Inventory Rating: Allowable Stress (AS),  Structural Evaluation: Equal to present minimum criteria,  Deck Geometry: Meets minimum limits,  Underclear: High priority of replacement,  Approach Roadway Alignment: Equal to present desirable criteria,  Length Of Structure Improvement: 1.31m (4.30ft),  Designated Inspection Frequency: Every 24 months,  Inspection Date: September 2021,  Bridge Improvement Cost: $2,718,000,  Roadway Improvement Cost: $200,000,  Total Project Cost: $3,142,000 ( Estimate for 2022),  Deck Structure Type: Concrete Cast-file-Place,  Wearing Surface/Protective System: Wearing Surface: Bituminous

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Structure Number: 70009700141,  Location: 1.5 MI. FROM JCT. RTE 108 (Lat: 43.153450,  Lng: -70.932644),  Route carried "on" structure: US 4,  Year Built: 1966,  Year Reconstructed: 2012,  Status: Open,  Structure Length: 2.50m (8.20ft),  Average Daily Traffic: 10,472 (year 2020),  Truck Traffic: 5%,  Average Future Daily Traffic: 15,498 (year 2042),  Design Load: HS 20,  Features Intersected: PAR
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 155.752,  Lanes on structure: 2,  Base Highway Network: Yes,  Owner: State Highway Agency,  Approaching Roadway Width: 14.0m (45.9ft),  Material/Design: Steel,  Design/Construction: Stringer/Multi-beam,  Number Of Spans In Main Unit: 1,  Length of Maximum Span: 23.8m (78.1ft),  Curb or Sidewalk Widths: Left: 0.2m (0.7ft),  Right: 0.2m (0.7ft),  Curb-To-Curb Width: 14.6m (47.9ft),  Out-to-Out Width: 16.5m (54.1ft)

Condition: Deck: Good,  Superstructure: Very good,  Substructure: Good,  Operating Rating: 45.5 metric tons,  Method Used To Determine Operating Rating: Load Factor (LF),  Inventory Rating: 27.3 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: Superior to present desirable criteria,  Approach Roadway Alignment: Equal to present desirable criteria,  Length Of Structure Improvement: 2.50m (8.20ft),  Designated Inspection Frequency: Every 24 months,  Inspection Date: June 2020,  Bridge Improvement Cost: $2,718,000,  Roadway Improvement Cost: $200,000,  Total Project Cost: $3,142,000 ( 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: 70010000143,  Location: .2 MI JCT RTE 4 (Lat: 43.155508,  Lng: -70.931906),  Route carried "on" structure: State highway ,  Year Built: 1980,  Status: Open,  Structure Length: 5.88m (19.29ft),  Average Daily Traffic: 4,369 (year 2020),  Truck Traffic: 4%,  Average Future Daily Traffic: 6,466 (year 2042),  Design Load: HS 20,  Features Intersected: PAR,  Facility Carried by Structure: MADBURY ROAD
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 0.006,  Lanes on structure: 2,  Owner: State Highway Agency,  Approaching Roadway Width: 9.8m (32.2ft),  Skew: 5 degrees,  Material/Design: Steel,  Design/Construction: Stringer/Multi-beam,  Number Of Spans In Main Unit: 3,  Length of Maximum Span: 26.2m (86.0ft),  Curb or Sidewalk Widths: Left: 1.5m (4.9ft),  Right: 0.2m (0.7ft),  Curb-To-Curb Width: 9.8m (32.2ft),  Out-to-Out Width: 12.0m (39.4ft)

Condition: Deck: Fair,  Superstructure: Satisfactory,  Substructure: Good,  Operating Rating: 43.3 metric tons,  Method Used To Determine Operating Rating: Load Factor (LF),  Inventory Rating: 25.9 metric tons,  Method Used To Determine Inventory Rating: Load Factor (LF),  Structural Evaluation: Equal to present minimum criteria,  Deck Geometry: Meets minimum limits,  Underclear: Better than present minimum criteria,  Approach Roadway Alignment: Better than present minimum criteria,  Length Of Structure Improvement: 5.88m (19.29ft),  Designated Inspection Frequency: Every 24 months,  Inspection Date: June 2020,  Bridge Improvement Cost: $2,718,000,  Roadway Improvement Cost: $200,000,  Total Project Cost: $3,142,000 ( 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: 7001070011,  Location: .2 MI WEST NH108 JCT (Lat: 43.129947,  Lng: -70.923342),  Route carried "on" structure: City street ,  Year Built: 1998,  Status: Open,  Structure Length: 0.70m (2.30ft),  Average Daily Traffic: 1,507 (year 2020),  Truck Traffic: 5%,  Average Future Daily Traffic: 2,230 (year 2042),  Design Load: HS 25 or greater,  Features Intersected: COLLEGE BROOK,  Facility Carried by Structure: MILL POND ROAD
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 0.404,  Lanes on structure: 2,  Owner: City or Municipal Highway Agency,  Approaching Roadway Width: 8.0m (26.2ft),  Skew: 1 degrees,  Material/Design: Concrete,  Design/Construction: Arch - Deck,  Number Of Spans In Main Unit: 1,  Length of Maximum Span: 6.6m (21.7ft),  Curb or Sidewalk Widths: Left: 0.2m (0.7ft),  Right: 1.4m (4.6ft),  Curb-To-Curb Width: 8.0m (26.2ft),  Out-to-Out Width: 12.0m (39.4ft)

Condition: Deck: Very good,  Superstructure: Very good,  Substructure: Very good,  Channel: Good,  Operating Rating: 51.3 metric tons,  Method Used To Determine Operating Rating: Field evaluation and documented engineering judgment,  Inventory Rating: 30.7 metric tons,  Method Used To Determine Inventory Rating: Field evaluation and documented engineering judgment,  Structural Evaluation: Better than present minimum criteria,  Deck Geometry: Meets minimum limits,  Waterway Adequacy: Equal to present desirable criteria,  Approach Roadway Alignment: Equal to present minimum criteria,  Length Of Structure Improvement: 0.70m (2.30ft),  Designated Inspection Frequency: Every 24 months,  Inspection Date: September 2021,  Bridge Improvement Cost: $2,718,000,  Roadway Improvement Cost: $200,000,  Total Project Cost: $3,142,000 ( Estimate for 2022),  Deck Structure Type: Concrete Precast Panels,  Wearing Surface/Protective System: Wearing Surface: Bituminous,  Membrane: Preformed Fabric

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Structure Number: 70011400111,  Location: .2 MI FR JCT. RTE. 4 (Lat: 43.130922,  Lng: -70.918425),  Route carried "on" structure: State highway 108,  Year Built: 1991,  Status: Open,  Structure Length: 0.95m (3.12ft),  Average Daily Traffic: 9,860 (year 2020),  Truck Traffic: 4%,  Average Future Daily Traffic: 14,592 (year 2042),  Design Load: HS 25 or greater,  Features Intersected: OYSTER RIVER
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 43.756,  Lanes on structure: 2,  Owner: State Highway Agency,  Approaching Roadway Width: 8.5m (27.9ft),  Material/Design: Concrete,  Design/Construction: Frame,  Number Of Spans In Main Unit: 1,  Length of Maximum Span: 7.6m (24.9ft),  Curb or Sidewalk Widths: Left: 0.2m (0.7ft),  Right: 0.2m (0.7ft),  Curb-To-Curb Width: 12.3m (40.4ft),  Out-to-Out Width: 13.8m (45.3ft)

Condition: Deck: Good,  Superstructure: Very good,  Substructure: Very good,  Channel: Very good,  Operating Rating: 61.2 metric tons,  Method Used To Determine Operating Rating: Load Factor (LF),  Inventory Rating: 40.8 metric tons,  Method Used To Determine Inventory Rating: Load Factor (LF),  Structural Evaluation: Equal to present desirable criteria,  Deck Geometry: Somewhat better than minimum adequacy,  Waterway Adequacy: Equal to present desirable criteria,  Approach Roadway Alignment: Better than present minimum criteria,  Length Of Structure Improvement: 0.95m (3.12ft),  Designated Inspection Frequency: Every 24 months,  Inspection Date: June 2020,  Bridge Improvement Cost: $2,718,000,  Roadway Improvement Cost: $200,000,  Total Project Cost: $3,142,000 ( 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: 70011400128,  Location: .4 MI. FROM JCT. NH 108 (Lat: 43.142889,  Lng: -70.916839),  Route carried "on" structure: Other road ,  Year Built: 1966,  Status: Open,  Structure Length: 6.58m (21.59ft),  Average Daily Traffic: 1,492 (year 2020),  Truck Traffic: 5%,  Average Future Daily Traffic: 2,208 (year 2042),  Design Load: HS 20,  Features Intersected: US 4,  Facility Carried by Structure: BAGDAD ROAD
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 1.051,  Lanes on structure: 2,  Lanes under structure: 2,  Owner: State Highway Agency,  Approaching Roadway Width: 9.8m (32.2ft),  Material/Design: Steel continuous,  Design/Construction: Stringer/Multi-beam,  Number Of Spans In Main Unit: 4,  Length of Maximum Span: 18.3m (60.0ft),  Curb or Sidewalk Widths: Left: 1.6m (5.2ft),  Right: 1.6m (5.2ft),  Curb-To-Curb Width: 9.8m (32.2ft),  Out-to-Out Width: 13.6m (44.6ft)

Condition: Deck: Good,  Superstructure: Good,  Substructure: Good,  Operating Rating: 45.4 metric tons,  Method Used To Determine Operating Rating: Load Factor (LF),  Inventory Rating: 32.7 metric tons,  Method Used To Determine Inventory Rating: Load Factor (LF),  Structural Evaluation: Better than present minimum criteria,  Deck Geometry: Somewhat better than minimum adequacy,  Underclear: Equal to present minimum criteria,  Approach Roadway Alignment: Equal to present desirable criteria,  Length Of Structure Improvement: 6.58m (21.59ft),  Designated Inspection Frequency: Every 24 months,  Inspection Date: June 2020,  Bridge Improvement Cost: $2,718,000,  Roadway Improvement Cost: $200,000,  Total Project Cost: $3,142,000 ( 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: 70012000122,  Location: .7 MI FROM MADBURY T.L. (Lat: 43.138481,  Lng: -70.911156),  Route carried "on" structure: US 4,  Year Built: 1966,  Status: Open,  Structure Length: 4.79m (15.72ft),  Average Daily Traffic: 11,885 (year 2020),  Truck Traffic: 5%,  Average Future Daily Traffic: 17,589 (year 2042),  Design Load: HS 20,  Features Intersected: NH108
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 158.224,  Lanes on structure: 2,  Lanes under structure: 2,  Base Highway Network: Yes,  Owner: State Highway Agency,  Approaching Roadway Width: 13.4m (44.0ft),  Skew: 1 degrees,  Material/Design: Steel continuous,  Design/Construction: Stringer/Multi-beam,  Number Of Spans In Main Unit: 3,  Length of Maximum Span: 19.8m (65.0ft),  Curb or Sidewalk Widths: Left: 0.2m (0.7ft),  Right: 0.2m (0.7ft),  Curb-To-Curb Width: 13.8m (45.3ft),  Out-to-Out Width: 15.6m (51.2ft)

Condition: Deck: Good,  Superstructure: Good,  Substructure: Good,  Operating Rating: 47.2 metric tons,  Method Used To Determine Operating Rating: Load Factor (LF),  Inventory Rating: 28.1 metric tons,  Method Used To Determine Inventory Rating: Load Factor (LF),  Structural Evaluation: Better than present minimum criteria,  Deck Geometry: Superior to present desirable criteria,  Underclear: Better than present minimum criteria,  Approach Roadway Alignment: Equal to present desirable criteria,  Length Of Structure Improvement: 4.79m (15.72ft),  Designated Inspection Frequency: Every 24 months,  Inspection Date: June 2020,  Bridge Improvement Cost: $2,718,000,  Roadway Improvement Cost: $200,000,  Total Project Cost: $3,142,000 ( 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: 70014500117,  Location: 1.8 MI W. MADBURY T.L. (Lat: 43.133586,  Lng: -70.886122),  Route carried "on" structure: US 4,  Year Built: 2020,  Status: Open,  Structure Length: 1.93m (6.33ft),  Average Daily Traffic: 14,100 (year 2020),  Truck Traffic: 5%,  Average Future Daily Traffic: 20,868 (year 2042),  Design Load: HL 93,  Features Intersected: BUNKER CREEK
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 160.386,  Lanes on structure: 2,  Base Highway Network: Yes,  Owner: State Highway Agency,  Approaching Roadway Width: 10.4m (34.1ft),  Material/Design: Steel,  Design/Construction: Stringer/Multi-beam,  Number Of Spans In Main Unit: 1,  Length of Maximum Span: 18.3m (60.0ft),  Curb or Sidewalk Widths: Left: 0.2m (0.7ft),  Right: 0.2m (0.7ft),  Curb-To-Curb Width: 10.1m (33.1ft),  Out-to-Out Width: 11.3m (37.1ft)

Condition: Deck: Excellent,  Superstructure: Excellent,  Substructure: Excellent,  Channel: Very good,  Operating Rating: 55.9 metric tons,  Method Used To Determine Operating Rating: Load and Resistance Factor (LRFR),  Inventory Rating: 43.1 metric tons,  Method Used To Determine Inventory Rating: Load and Resistance Factor (LRFR),  Structural Evaluation: Superior to present desirable criteria,  Deck Geometry: Meets minimum limits,  Waterway Adequacy: Superior to present desirable criteria,  Approach Roadway Alignment: Equal to present minimum criteria,  Length Of Structure Improvement: 1.93m (6.33ft),  Designated Inspection Frequency: Every 24 months,  Inspection Date: November 2020,  Bridge Improvement Cost: $2,718,000,  Roadway Improvement Cost: $200,000,  Total Project Cost: $3,142,000 ( Estimate for 2022),  Deck Structure Type: Concrete Cast-file-Place,  Wearing Surface/Protective System: Wearing Surface: Monolithic Concrete,  Deck Protection: Other

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Structure Number: 70011400128,  Location: .4 MI. FROM JCT. NH 108 (Lat: 43.142889,  Lng: -70.916839),  Route carried "under" structure: US 4,  Year Built: 1966,  Structure Length: 0. m,  Average Daily Traffic: 15,000 (year 2015),  Truck Traffic: 5%,  Features Intersected: US 4,  Facility Carried by Structure: BAGDAD ROAD
Minimum Vertical Clearance: 5.04m (16.54ft),  Kilometerpoint: 0.000,  Lanes on structure: 2,  Lanes under structure: 2,  Material/Design: Steel continuous,  Design/Construction: Stringer/Multi-beam,  Length of Maximum Span: 18.3m (60.0ft)