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Bridge Statistics for Swan Lake, Montana (MT)
Condition, Traffic, Stress, Structural Evaluation, Project Costs


  • National Bridge Inventory (NBI) Statistics
  • 10Number of bridges
  • 56ft / 16.9mTotal length
  • $57,000Total costs
  • 5,570Total average daily traffic
  • 449Total average daily truck traffic
  • 6,198Total future (year 2040) average daily traffic
  • National Bridge Inventory (NBI) Registered Bridges for Swan Lake
  • No street view available for this location

New bridges in Swan Lake, MT - historical statistics
  • New bridges - historical statistics
  • 61950-1959
  • 11990-1999
  • 12000-2009
  • 22010-2019
Bridge Condition - Deck
  • Bridge Condition - Deck
  • 30.0%Very good
  • 40.0%Good
  • 30.0%Satisfactory
Bridge Condition - Superstructure
  • Bridge Condition - Superstructure
  • 30.0%Very good
  • 60.0%Good
  • 10.0%Satisfactory
Bridge Condition - Substructure
  • Bridge Condition - Substructure
  • 30.0%Very good
  • 10.0%Good
  • 30.0%Fair
  • 30.0%Poor
Bridge Condition - Channel
  • Bridge Condition - Channel
  • 10.0%Excellent
  • 60.0%Very good
  • 30.0%Good
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Structure Number: 11001000000109,  Location: PORCUPINE CREEK ROAD (Lat: 47.886664,  Lng: -113.860467),  Route carried "on" structure: Federal lands road 10229,  Year Built: 1956,  Status: Open,  Structure Length: 7.04m (23.10ft),  Average Daily Traffic: 20 (year 1992),  Average Future Daily Traffic: 30 (year 2042),  Design Load: HS 25 or greater,  Features Intersected: SWAN RIVER,  Facility Carried by Structure: FOREST ROAD
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 2.088,  Lanes on structure: 1,  Owner: U.S. Forest Service,  Approaching Roadway Width: 4.9m (16.1ft),  Material/Design: Steel,  Design/Construction: Stringer/Multi-beam,  Number Of Spans In Main Unit: 3,  Length of Maximum Span: 27.7m (90.9ft),  Curb or Sidewalk Widths: Left: 0.2m (0.7ft),  Right: 0.2m (0.7ft),  Curb-To-Curb Width: 4.3m (14.1ft),  Out-to-Out Width: 4.7m (15.4ft)

Condition: Deck: Satisfactory,  Superstructure: Satisfactory,  Substructure: Poor,  Channel: Good,  Operating Rating: 53.1 metric tons,  Method Used To Determine Operating Rating: Load and Resistance Factor Rating (LRFR) rating reported by rating factor(RF) method using HL-93 loadings,  Inventory Rating: 40.8 metric tons,  Method Used To Determine Inventory Rating: Load and Resistance Factor Rating (LRFR) rating reported by rating factor(RF) method using HL-93 loadings,  Structural Evaluation: Meets minimum limits,  Deck Geometry: Equal to present minimum criteria,  Waterway Adequacy: Superior to present desirable criteria,  Approach Roadway Alignment: Equal to present desirable criteria,  Designated Inspection Frequency: Every 24 months,  Inspection Date: September 2021,  Deck Structure Type: Wood or Timber,  Wearing Surface/Protective System: Wearing Surface: Wood or Timber
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Structure Number: 11001000001254,  Location: SWAN LAKE CAMPGROUND (Lat: 47.935981,  Lng: -113.844242),  Route carried "on" structure: Federal lands road 1073,  Year Built: 1997,  Status: Open,  Structure Length: 0.85m (2.79ft),  Average Daily Traffic: 50 (year 1997),  Average Future Daily Traffic: 75 (year 2042),  Design Load: H 20,  Features Intersected: HALL CREEK,  Facility Carried by Structure: FOREST ROAD
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 0.712,  Lanes on structure: 1,  Owner: U.S. Forest Service,  Approaching Roadway Width: 5.5m (18.0ft),  Skew: 1 degrees,  Material/Design: Prestressed concrete,  Design/Construction: Stringer/Multi-beam,  Number Of Spans In Main Unit: 1,  Length of Maximum Span: 8.0m (26.2ft),  Curb or Sidewalk Widths: Left: 0.3m (1.0ft),  Right: 1.5m (4.9ft),  Curb-To-Curb Width: 4.3m (14.1ft),  Out-to-Out Width: 6.1m (20.0ft)

Condition: Deck: Good,  Superstructure: Good,  Substructure: Good,  Channel: Good,  Operating Rating: 25.9 metric tons,  Method Used To Determine Operating Rating: Load and Resistance Factor Rating (LRFR) rating reported by rating factor(RF) method using HL-93 loadings,  Inventory Rating: 20.4 metric tons,  Method Used To Determine Inventory Rating: Load and Resistance Factor Rating (LRFR) rating reported by rating factor(RF) method using HL-93 loadings,  Structural Evaluation: Somewhat better than minimum adequacy,  Deck Geometry: Equal to present minimum criteria,  Waterway Adequacy: Superior to present desirable criteria,  Approach Roadway Alignment: Equal to present desirable criteria,  Designated Inspection Frequency: Every 24 months,  Inspection Date: October 2020,  Deck Structure Type: Concrete Precast Panels,  Wearing Surface/Protective System: Wearing Surface: Monolithic Concrete
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Structure Number: 11001000003027,  Location: NORTH FORK LOST CREEK (Lat: 47.897731,  Lng: -113.738536),  Route carried "on" structure: Federal lands road 5206,  Year Built: 2005,  Status: Open,  Structure Length: 1.04m (3.41ft),  Average Daily Traffic: 30 (year 2003),  Average Future Daily Traffic: 45 (year 2042),  Design Load: HS 20,  Features Intersected: CREEK,  Facility Carried by Structure: FOREST ROAD
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 5.728,  Lanes on structure: 1,  Owner: U.S. Forest Service,  Approaching Roadway Width: 4.9m (16.1ft),  Material/Design: Prestressed concrete,  Design/Construction: Slab,  Number Of Spans In Main Unit: 1,  Length of Maximum Span: 10.1m (33.1ft),  Curb or Sidewalk Widths: Left: 0.3m (1.0ft),  Right: 0.3m (1.0ft),  Curb-To-Curb Width: 4.3m (14.1ft),  Out-to-Out Width: 4.9m (16.1ft)

Condition: Deck: Very good,  Superstructure: Very good,  Substructure: Very good,  Channel: Very good,  Operating Rating: 33.7 metric tons,  Method Used To Determine Operating Rating: Load and Resistance Factor Rating (LRFR) rating reported by rating factor(RF) method using HL-93 loadings,  Inventory Rating: 25.9 metric tons,  Method Used To Determine Inventory Rating: Load and Resistance Factor Rating (LRFR) rating reported by rating factor(RF) method using HL-93 loadings,  Structural Evaluation: Equal to present minimum criteria,  Deck Geometry: Equal to present minimum criteria,  Waterway Adequacy: Superior to present desirable criteria,  Approach Roadway Alignment: Equal to present desirable criteria,  Designated Inspection Frequency: Every 48 months,  Inspection Date: August 2021,  Deck Structure Type: Concrete Precast Panels,  Wearing Surface/Protective System: Wearing Surface: Monolithic Concrete,  Membrane: Epoxy
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Structure Number: 11001000016329,  Location: SOUTH LOST (Lat: 47.884939,  Lng: -113.798850),  Route carried "on" structure: Federal lands road 680,  Year Built: 2014,  Status: Open,  Structure Length: 1.83m (6.00ft),  Average Daily Traffic: 40 (year 0000),  Average Future Daily Traffic: 60 (year 2042),  Design Load: HL 93,  Features Intersected: NORTH FORK LOST CREEK,  Facility Carried by Structure: FOREST ROAD
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 3.736,  Lanes on structure: 1,  Owner: U.S. Forest Service,  Approaching Roadway Width: 4.3m (14.1ft),  Material/Design: Prestressed concrete,  Design/Construction: Stringer/Multi-beam,  Number Of Spans In Main Unit: 1,  Length of Maximum Span: 17.4m (57.1ft),  Curb or Sidewalk Widths: Left: 0.3m (1.0ft),  Right: 0.3m (1.0ft),  Curb-To-Curb Width: 4.3m (14.1ft),  Out-to-Out Width: 4.9m (16.1ft)

Condition: Deck: Very good,  Superstructure: Very good,  Substructure: Very good,  Channel: Very good,  Operating Rating: 38.9 metric tons,  Method Used To Determine Operating Rating: Load and Resistance Factor Rating (LRFR) rating reported by rating factor(RF) method using HL-93 loadings,  Inventory Rating: 30.1 metric tons,  Method Used To Determine Inventory Rating: Load and Resistance Factor Rating (LRFR) rating reported by rating factor(RF) method using HL-93 loadings,  Structural Evaluation: Better than present minimum criteria,  Deck Geometry: Equal to present minimum criteria,  Waterway Adequacy: Superior to present desirable criteria,  Approach Roadway Alignment: Equal to present desirable criteria,  Designated Inspection Frequency: Every 48 months,  Inspection Date: August 2018,  Deck Structure Type: Concrete Precast Panels,  Wearing Surface/Protective System: Wearing Surface: Monolithic Concrete
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Structure Number: 11001000016919,  Location: NORTH LOST (Lat: 47.895125,  Lng: -113.745186),  Route carried "on" structure: Federal lands road 5206,  Year Built: 2015,  Status: Open,  Structure Length: 1.83m (6.00ft),  Average Daily Traffic: 40 (year 0000),  Average Future Daily Traffic: 60 (year 2042),  Design Load: HL 93,  Features Intersected: NORTH FORK LOST CREEK,  Facility Carried by Structure: FOREST ROAD
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 5.160,  Lanes on structure: 1,  Owner: U.S. Forest Service,  Approaching Roadway Width: 4.3m (14.1ft),  Skew: 2 degrees,  Material/Design: Prestressed concrete,  Design/Construction: Stringer/Multi-beam,  Number Of Spans In Main Unit: 1,  Length of Maximum Span: 17.7m (58.1ft),  Curb or Sidewalk Widths: Left: 0.3m (1.0ft),  Right: 0.3m (1.0ft),  Curb-To-Curb Width: 4.9m (16.1ft),  Out-to-Out Width: 5.5m (18.0ft)

Condition: Deck: Very good,  Superstructure: Very good,  Substructure: Very good,  Channel: Excellent,  Operating Rating: 36.3 metric tons,  Method Used To Determine Operating Rating: Load and Resistance Factor Rating (LRFR) rating reported by rating factor(RF) method using HL-93 loadings,  Inventory Rating: 28.2 metric tons,  Method Used To Determine Inventory Rating: Load and Resistance Factor Rating (LRFR) rating reported by rating factor(RF) method using HL-93 loadings,  Structural Evaluation: Better than present minimum criteria,  Deck Geometry: High priority of corrective action,  Waterway Adequacy: Equal to present desirable criteria,  Approach Roadway Alignment: Equal to present minimum criteria,  Designated Inspection Frequency: Every 48 months,  Inspection Date: August 2021,  Deck Structure Type: Concrete Precast Panels,  Wearing Surface/Protective System: Wearing Surface: Bituminous
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Structure Number: P00083067+02881,  Location: 3M S SWAN LAKE (Lat: 47.873794,  Lng: -113.834261),  Route carried "on" structure: State highway 83,  Year Built: 1953,  Status: Open,  Structure Length: 1.77m (5.81ft),  Average Daily Traffic: 938 (year 2020),  Truck Traffic: 10%,  Average Future Daily Traffic: 1,032 (year 2040),  Design Load: HS 20,  Features Intersected: LOST CREEK
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 108.267,  Lanes on structure: 2,  Base Highway Network: Yes,  Owner: State Highway Agency,  Approaching Roadway Width: 7.3m (24.0ft),  Material/Design: Wood or Timber,  Design/Construction: Stringer/Multi-beam,  Number Of Spans In Main Unit: 3,  Length of Maximum Span: 5.8m (19.0ft),  Curb or Sidewalk Widths: Left: 0.6m (2.0ft),  Right: 0.6m (2.0ft),  Curb-To-Curb Width: 7.9m (25.9ft),  Out-to-Out Width: 9.4m (30.8ft)

Condition: Deck: Good,  Superstructure: Good,  Substructure: Fair,  Channel: Very good,  Operating Rating: 41.5 metric tons,  Method Used To Determine Operating Rating: Allowable Stress (AS),  Inventory Rating: 28.9 metric tons,  Method Used To Determine Inventory Rating: Allowable Stress (AS),  Structural Evaluation: Somewhat better than minimum adequacy,  Deck Geometry: Somewhat better than minimum adequacy,  Waterway Adequacy: Equal to present desirable criteria,  Approach Roadway Alignment: Equal to present desirable criteria,  Designated Inspection Frequency: Every 24 months,  Inspection Date: July 2020,  Deck Structure Type: Wood or Timber,  Wearing Surface/Protective System: Wearing Surface: Bituminous
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Structure Number: P00083070+06501,  Location: SWAN LAKE (Lat: 47.916828,  Lng: -113.838572),  Route carried "on" structure: State highway 83,  Year Built: 1958,  Status: Open,  Structure Length: 0.64m (2.10ft),  Average Daily Traffic: 1,113 (year 2020),  Truck Traffic: 8%,  Average Future Daily Traffic: 1,224 (year 2040),  Design Load: HS 20,  Features Intersected: BOND CREEK
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 113.231,  Lanes on structure: 2,  Base Highway Network: Yes,  Owner: State Highway Agency,  Approaching Roadway Width: 7.9m (25.9ft),  Material/Design: Wood or Timber,  Design/Construction: Stringer/Multi-beam,  Number Of Spans In Main Unit: 1,  Length of Maximum Span: 5.8m (19.0ft),  Curb or Sidewalk Widths: Left: 0.6m (2.0ft),  Right: 0.6m (2.0ft),  Curb-To-Curb Width: 8.0m (26.2ft),  Out-to-Out Width: 9.4m (30.8ft)

Condition: Deck: Good,  Superstructure: Good,  Substructure: Fair,  Channel: Good,  Operating Rating: 64.0 metric tons,  Method Used To Determine Operating Rating: Allowable Stress (AS),  Inventory Rating: 45.7 metric tons,  Method Used To Determine Inventory Rating: Allowable Stress (AS),  Structural Evaluation: Somewhat better than minimum adequacy,  Deck Geometry: Meets minimum limits,  Waterway Adequacy: High priority of corrective action,  Approach Roadway Alignment: Equal to present desirable criteria,  Length Of Structure Improvement: 1.30m (4.27ft),  Designated Inspection Frequency: Every 24 months,  Inspection Date: July 2020,  Bridge Improvement Cost: $38,000,  Roadway Improvement Cost: $19,000,  Total Project Cost: $57,000,  Deck Structure Type: Wood or Timber,  Wearing Surface/Protective System: Wearing Surface: Bituminous
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Structure Number: P00083070+09001,  Location: SWAN LAKE (Lat: 47.922092,  Lng: -113.841114),  Route carried "on" structure: State highway 83,  Year Built: 1958,  Year Reconstructed: 1991,  Status: Open,  Structure Length: 0.64m (2.10ft),  Average Daily Traffic: 1,113 (year 2020),  Truck Traffic: 8%,  Average Future Daily Traffic: 1,224 (year 2040),  Design Load: HS 20,  Features Intersected: NORTH FORK BOND CREEK
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 113.866,  Lanes on structure: 2,  Base Highway Network: Yes,  Owner: State Highway Agency,  Approaching Roadway Width: 9.8m (32.2ft),  Material/Design: Wood or Timber,  Design/Construction: Stringer/Multi-beam,  Number Of Spans In Main Unit: 1,  Length of Maximum Span: 5.8m (19.0ft),  Curb-To-Curb Width: 9.2m (30.2ft),  Out-to-Out Width: 12.1m (39.7ft)

Condition: Deck: Good,  Superstructure: Good,  Substructure: Fair,  Channel: Very good,  Operating Rating: 64.0 metric tons,  Method Used To Determine Operating Rating: Allowable Stress (AS),  Inventory Rating: 45.7 metric tons,  Method Used To Determine Inventory Rating: Allowable Stress (AS),  Structural Evaluation: Somewhat better than minimum adequacy,  Deck Geometry: Somewhat better than minimum adequacy,  Waterway Adequacy: Equal to present minimum criteria,  Approach Roadway Alignment: Equal to present desirable criteria,  Designated Inspection Frequency: Every 24 months,  Inspection Date: July 2020,  Deck Structure Type: Wood or Timber,  Wearing Surface/Protective System: Wearing Surface: Bituminous
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Structure Number: P00083071+04501,  Location: 1M W SWAN LAKE (Lat: 47.931022,  Lng: -113.847272),  Route carried "on" structure: State highway 83,  Year Built: 1958,  Year Reconstructed: 1991,  Status: Open,  Structure Length: 0.64m (2.10ft),  Average Daily Traffic: 1,113 (year 2020),  Truck Traffic: 8%,  Average Future Daily Traffic: 1,224 (year 2040),  Design Load: HS 20,  Features Intersected: GROOM CREEK
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 114.964,  Lanes on structure: 2,  Base Highway Network: Yes,  Owner: State Highway Agency,  Approaching Roadway Width: 9.8m (32.2ft),  Material/Design: Wood or Timber,  Design/Construction: Stringer/Multi-beam,  Number Of Spans In Main Unit: 1,  Length of Maximum Span: 5.8m (19.0ft),  Curb-To-Curb Width: 9.2m (30.2ft),  Out-to-Out Width: 12.2m (40.0ft)

Condition: Deck: Satisfactory,  Superstructure: Good,  Substructure: Poor,  Channel: Very good,  Operating Rating: 64.0 metric tons,  Method Used To Determine Operating Rating: Allowable Stress (AS),  Inventory Rating: 45.7 metric tons,  Method Used To Determine Inventory Rating: Allowable Stress (AS),  Structural Evaluation: Meets minimum limits,  Deck Geometry: Somewhat better than minimum adequacy,  Waterway Adequacy: Equal to present minimum criteria,  Approach Roadway Alignment: Equal to present desirable criteria,  Designated Inspection Frequency: Every 24 months,  Other Special Inspection Frequency: Every 6 months,  Inspection Date: July 2020,  Other Special Inspection Date: September 2021,  Deck Structure Type: Wood or Timber,  Wearing Surface/Protective System: Wearing Surface: Bituminous
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Structure Number: P00083071+07001,  Location: 1M W SWAN LAKE (Lat: 47.933700,  Lng: -113.849697),  Route carried "on" structure: State highway 83,  Year Built: 1958,  Year Reconstructed: 1991,  Status: Open,  Structure Length: 0.64m (2.10ft),  Average Daily Traffic: 1,113 (year 2020),  Truck Traffic: 8%,  Average Future Daily Traffic: 1,224 (year 2040),  Design Load: HS 20,  Features Intersected: HALL CREEK
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 115.311,  Lanes on structure: 2,  Base Highway Network: Yes,  Owner: State Highway Agency,  Approaching Roadway Width: 9.8m (32.2ft),  Material/Design: Wood or Timber,  Design/Construction: Stringer/Multi-beam,  Number Of Spans In Main Unit: 1,  Length of Maximum Span: 5.8m (19.0ft),  Curb-To-Curb Width: 9.7m (31.8ft),  Out-to-Out Width: 12.2m (40.0ft)

Condition: Deck: Satisfactory,  Superstructure: Good,  Substructure: Poor,  Channel: Very good,  Operating Rating: 64.0 metric tons,  Method Used To Determine Operating Rating: Allowable Stress (AS),  Inventory Rating: 45.7 metric tons,  Method Used To Determine Inventory Rating: Allowable Stress (AS),  Structural Evaluation: Meets minimum limits,  Deck Geometry: Somewhat better than minimum adequacy,  Waterway Adequacy: Meets minimum limits,  Approach Roadway Alignment: Better than present minimum criteria,  Designated Inspection Frequency: Every 24 months,  Inspection Date: July 2020,  Deck Structure Type: Wood or Timber,  Wearing Surface/Protective System: Wearing Surface: Bituminous
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