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Bridge Statistics for Ishpeming, Michigan (MI)
Condition, Traffic, Stress, Structural Evaluation, Project Costs


  • National Bridge Inventory (NBI) Statistics
  • 10Number of bridges
  • 26ft / 8.4mTotal length
  • 39,426Total average daily traffic
  • 1,782Total average daily truck traffic
  • National Bridge Inventory (NBI) Registered Bridges for Ishpeming
  • No street view available for this location

New bridges in Ishpeming, MI - historical statistics
  • New bridges - historical statistics
  • 31960-1969
  • 11970-1979
  • 21980-1989
  • 21990-1999
  • 12000-2009
  • 12010-2019
Average Bridge Daily Traffic in Ishpeming, MI
Average Bridge Truck Traffic in Ishpeming, MI
Bridge Condition - Deck
  • Bridge Condition - Deck
  • 66.7%Good
  • 33.3%Satisfactory
Bridge Condition - Substructure
  • Bridge Condition - Substructure
  • 66.7%Good
  • 33.3%Satisfactory
Bridge Condition - Channel
  • Bridge Condition - Channel
  • 42.9%Very good
  • 42.9%Good
  • 14.3%Fair
Bridge Condition - Culverts
  • Bridge Condition - Culverts
  • 25.0%Very good
  • 75.0%Good
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Structure Number: 6498,  Location: IN ISHPEMING (Lat: 46.498383,  Lng: -87.683156),  Route carried "on" structure: US 41,  Year Built: 1979,  Status: Open,  Structure Length: 1.22m (4.00ft),  Average Daily Traffic: 13,542 (year 2007),  Truck Traffic: 3%,  Average Future Daily Traffic: 14,998 (year 2018),  Design Load: HS 25 or greater,  Features Intersected: CARP RIVER
Minimum Vertical Clearance: 30.48m (100.00ft),  Kilometerpoint: 61.922,  Lanes on structure: 5,  Base Highway Network: Yes (Inventory Route: 156,  Subroute: 9),  Owner: State Highway Agency,  Approaching Roadway Width: 25.9m (85.0ft),  Skew: 2 degrees,  Material/Design: Steel,  Design/Construction: Stringer/Multi-beam,  Number Of Spans In Main Unit: 1,  Length of Maximum Span: 12.2m (40.0ft),  Curb-To-Curb Width: 25.9m (85.0ft),  Out-to-Out Width: 26.8m (87.9ft)

Condition: Deck: Satisfactory,  Superstructure: Good,  Substructure: Good,  Channel: Good,  Operating Rating: 94.9 metric tons,  Method Used To Determine Operating Rating: Load Factor (LF) rating reported by rating factor (RF) method using MS18 loading,  Inventory Rating: 56.7 metric tons,  Method Used To Determine Inventory Rating: Load Factor (LF) rating reported by rating factor (RF) method using MS18 loading,  Structural Evaluation: Better than present minimum criteria,  Deck Geometry: Superior to present desirable criteria,  Waterway Adequacy: Equal to present desirable criteria,  Approach Roadway Alignment: Equal to present desirable criteria,  Designated Inspection Frequency: Every 24 months,  Inspection Date: June 2021,  Deck Structure Type: Concrete Cast-file-Place,  Wearing Surface/Protective System: Wearing Surface: Latex Concrete,  Deck Protection: Epoxy Coated Reinforcing
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Structure Number: 6521,  Location: W LIMITS OF ISHPEMING (Lat: 46.486358,  Lng: -87.689433),  Route carried "on" structure: City street ,  Year Built: 2010,  Status: Open,  Structure Length: 0.63m (2.07ft),  Average Daily Traffic: 4,187 (year 2003),  Truck Traffic: 30%,  Average Future Daily Traffic: 4,800 (year 2023),  Features Intersected: CARP RIVER CHANNEL,  Facility Carried by Structure: OLD M-28 BR
Minimum Vertical Clearance: 30.48m (100.00ft),  Kilometerpoint: 3.024,  Lanes on structure: 2,  Owner: City or Municipal Highway Agency,  Approaching Roadway Width: 12.2m (40.0ft),  Material/Design: Concrete,  Design/Construction: Culvert,  Number Of Spans In Main Unit: 1,  Length of Maximum Span: 6.2m (20.3ft),  Curb-To-Curb Width: 12.2m (40.0ft),  Out-to-Out Width: 15.2m (49.9ft)

Condition: Channel: Very good,  Culverts: Very good,  Operating Rating: 64.8 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: 51.8 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: Equal to present desirable criteria,  Deck Geometry: Equal to present minimum criteria,  Waterway Adequacy: Equal to present desirable criteria,  Approach Roadway Alignment: Equal to present desirable criteria,  Designated Inspection Frequency: Every 24 months,  Inspection Date: October 2021,  Wearing Surface/Protective System: Wearing Surface: Bituminous,  Membrane: Preformed Fabric
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Structure Number: 6547,  Location: 1 MILE NORTH OF US-41 (Lat: 46.515125,  Lng: -87.674928),  Route carried "on" structure: County highway 5239,  Year Built: 1982,  Status: Open,  Structure Length: 2.80m (9.19ft),  Average Daily Traffic: 995 (year 2001),  Average Future Daily Traffic: 1,005 (year 2020),  Design Load: HS 20+Mod,  Features Intersected: CARP RIVER,  Facility Carried by Structure: COUNTY RD 573
Minimum Vertical Clearance: 30.48m (100.00ft),  Kilometerpoint: 1.254,  Lanes on structure: 2,  Owner: County Highway Agency,  Approaching Roadway Width: 8.5m (27.9ft),  Skew: 4 degrees,  Material/Design: Prestressed concrete,  Design/Construction: Box Beam or Girders - Multiple,  Number Of Spans In Main Unit: 1,  Length of Maximum Span: 27.4m (89.9ft),  Curb-To-Curb Width: 10.3m (33.8ft),  Out-to-Out Width: 10.4m (34.1ft)

Condition: Deck: Good,  Superstructure: Good,  Substructure: Good,  Channel: Very good,  Operating Rating: 66.4 metric tons,  Method Used To Determine Operating Rating: Load Factor (LF),  Inventory Rating: 29.1 metric tons,  Method Used To Determine Inventory Rating: Load Factor (LF),  Structural Evaluation: Better than present minimum criteria,  Deck Geometry: Equal to present minimum criteria,  Waterway Adequacy: Better than present minimum criteria,  Approach Roadway Alignment: Somewhat better than minimum adequacy,  Designated Inspection Frequency: Every 24 months,  Inspection Date: October 2020,  Deck Structure Type: Concrete Cast-file-Place,  Wearing Surface/Protective System: Wearing Surface: Bituminous,  Deck Protection: Epoxy Coated Reinforcing
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Structure Number: 6548,  Location: 6 MILES N OF ISHPEMING (Lat: 46.560711,  Lng: -87.698869),  Route carried "on" structure: County highway 5239,  Year Built: 1983,  Status: Open,  Structure Length: 1.18m (3.87ft),  Average Daily Traffic: 693 (year 2001),  Average Future Daily Traffic: 707 (year 2020),  Design Load: HS 20+Mod,  Features Intersected: LITTLE DEAD RIVER,  Facility Carried by Structure: COUNTY RD 573
Minimum Vertical Clearance: 30.48m (100.00ft),  Kilometerpoint: 10.332,  Lanes on structure: 2,  Owner: County Highway Agency,  Approaching Roadway Width: 10.3m (33.8ft),  Material/Design: Prestressed concrete,  Design/Construction: Box Beam or Girders - Multiple,  Number Of Spans In Main Unit: 1,  Length of Maximum Span: 10.9m (35.8ft),  Curb-To-Curb Width: 10.3m (33.8ft),  Out-to-Out Width: 10.4m (34.1ft)

Condition: Deck: Good,  Superstructure: Good,  Substructure: Satisfactory,  Channel: Fair,  Inventory Rating: 49.1 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,  Waterway Adequacy: Equal to present desirable criteria,  Approach Roadway Alignment: Better than present minimum criteria,  Designated Inspection Frequency: Every 24 months,  Inspection Date: October 2020,  Deck Structure Type: Concrete Cast-file-Place,  Wearing Surface/Protective System: Wearing Surface: Bituminous,  Deck Protection: Epoxy Coated Reinforcing
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Structure Number: 6621,  Location: 0.1 MI N OF US-41/M-28 (Lat: 46.498914,  Lng: -87.683175),  Route carried "on" structure: City street ,  Year Built: 1993,  Status: Open,  Structure Length: 0.88m (2.89ft),  Average Daily Traffic: 4,750 (year 1993),  Average Future Daily Traffic: 7,160 (year 2012),  Design Load: HS 20,  Features Intersected: CARP CREEK,  Facility Carried by Structure: LAKESHORE DRIVE
Minimum Vertical Clearance: 30.48m (100.00ft),  Kilometerpoint: 0.052,  Lanes on structure: 2,  Owner: City or Municipal Highway Agency,  Approaching Roadway Width: 7.3m (24.0ft),  Skew: 4 degrees,  Material/Design: Concrete,  Design/Construction: Culvert,  Number Of Spans In Main Unit: 2,  Length of Maximum Span: 4.4m (14.4ft),  Out-to-Out Width: 48.8m (160.1ft)

Condition: Channel: Very good,  Culverts: Good,  Operating Rating: 54.5 metric tons,  Method Used To Determine Operating Rating: Field evaluation and documented engineering judgment,  Inventory Rating: 32.7 metric tons,  Method Used To Determine Inventory Rating: Field evaluation and documented engineering judgment,  Structural Evaluation: Better than 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 2021
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Structure Number: 6623,  Location: 0.1 MI W OF LAKESHORE DR (Lat: 46.496344,  Lng: -87.681517),  Route carried "on" structure: City street ,  Year Built: 2006,  Status: Open,  Structure Length: 0.91m (2.99ft),  Average Daily Traffic: 121 (year 2003),  Truck Traffic: 15%,  Average Future Daily Traffic: 232 (year 2025),  Design Load: HS 20+Mod,  Features Intersected: CARP RIVER,  Facility Carried by Structure: CARSON ROAD
Minimum Vertical Clearance: 30.48m (100.00ft),  Kilometerpoint: 0.023,  Lanes on structure: 1,  Owner: City or Municipal Highway Agency,  Approaching Roadway Width: 9.1m (29.9ft),  Material/Design: Concrete,  Design/Construction: Culvert,  Number Of Spans In Main Unit: 1,  Length of Maximum Span: 8.5m (27.9ft),  Curb-To-Curb Width: 10.4m (34.1ft),  Out-to-Out Width: 14.6m (47.9ft)

Condition: Channel: Good,  Culverts: Good,  Operating Rating: 84.2 metric tons,  Method Used To Determine Operating Rating: Load Factor (LF) rating reported by rating factor (RF) method using MS18 loading,  Inventory Rating: 53.1 metric tons,  Method Used To Determine Inventory Rating: Load Factor (LF) rating reported by rating factor (RF) method using MS18 loading,  Structural Evaluation: Better than present minimum criteria,  Deck Geometry: Better than present minimum criteria,  Waterway Adequacy: Equal to present desirable criteria,  Approach Roadway Alignment: Superior to present desirable criteria,  Designated Inspection Frequency: Every 24 months,  Inspection Date: October 2021
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Structure Number: 13479,  Location: 0.1 M E OF N LAKESHORE DR (Lat: 46.502147,  Lng: -87.681489),  Route carried "on" structure: City street ,  Year Built: 1996,  Status: Open,  Structure Length: 0.79m (2.59ft),  Average Daily Traffic: 1,000 (year 2008),  Truck Traffic: 5%,  Average Future Daily Traffic: 2,000 (year 2018),  Design Load: HS 20,  Features Intersected: CARP RIVER,  Facility Carried by Structure: RIVER PARK RD
Minimum Vertical Clearance: 30.48m (100.00ft),  Kilometerpoint: 0.410,  Lanes on structure: 2,  Owner: City or Municipal Highway Agency,  Approaching Roadway Width: 12.2m (40.0ft),  Material/Design: Concrete,  Design/Construction: Culvert,  Number Of Spans In Main Unit: 2,  Length of Maximum Span: 3.7m (12.1ft),  Curb-To-Curb Width: 11.9m (39.0ft),  Out-to-Out Width: 12.2m (40.0ft)

Condition: Channel: Good,  Culverts: Good,  Operating Rating: 65.6 metric tons,  Method Used To Determine Operating Rating: Field evaluation and documented engineering judgment,  Inventory Rating: 39.2 metric tons,  Method Used To Determine Inventory Rating: Field evaluation and documented engineering judgment,  Structural Evaluation: Better than present minimum criteria,  Deck Geometry: Better than present minimum criteria,  Waterway Adequacy: Superior to present desirable criteria,  Approach Roadway Alignment: Superior to present desirable criteria,  Designated Inspection Frequency: Every 24 months,  Inspection Date: October 2021,  Deck Structure Type: Concrete Precast Panels,  Wearing Surface/Protective System: Wearing Surface: Bituminous
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Structure Number: 6619,  Location: 0.1 MI S OF US 41 OR M-28 (Lat: 46.502378,  Lng: -87.666092),  Route carried "under" structure: City street ,  Year Built: 1963,  Structure Length: 0. m,  Average Daily Traffic: 2,500 (year 1977),  Features Intersected: SECOND STREET,  Facility Carried by Structure: WCL RR
Minimum Vertical Clearance: 4.34m (14.24ft),  Kilometerpoint: 0.698,  Lanes under structure: 2,  Material/Design: Steel,  Design/Construction: Stringer/Multi-beam,  Length of Maximum Span: 14.6m (47.9ft)

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Structure Number: 662,  Location: 0.1 MI S OF US-41 OR M-28 (Lat: 46.502511,  Lng: -87.664844),  Route carried "under" structure: City street ,  Year Built: 1963,  Structure Length: 0. m,  Average Daily Traffic: 6,400 (year 1977),  Features Intersected: THIRD STREET,  Facility Carried by Structure: WCL RR
Minimum Vertical Clearance: 4.59m (15.06ft),  Kilometerpoint: 0.410,  Lanes under structure: 2,  Material/Design: Steel,  Design/Construction: Stringer/Multi-beam,  Length of Maximum Span: 14.6m (47.9ft)

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Structure Number: 6622,  Location: 0.1 MI S OF US-41 OR M-28 (Lat: 46.498089,  Lng: -87.682517),  Route carried "under" structure: Business State highway 28,  Year Built: 1963,  Structure Length: 0. m,  Average Daily Traffic: 5,238 (year 2007),  Truck Traffic: 1%,  Features Intersected: M-28 BR (LAKESHORE DR),  Facility Carried by Structure: WCL RR
Minimum Vertical Clearance: 4.93m (16.17ft),  Kilometerpoint: 0.053,  Lanes under structure: 2,  Material/Design: Steel,  Design/Construction: Stringer/Multi-beam,  Length of Maximum Span: 14.9m (48.9ft)

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