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Bridge Statistics for Northwood, Iowa (IA)
Condition, Traffic, Stress, Structural Evaluation, Project Costs


  • National Bridge Inventory (NBI) Statistics
  • 11Number of bridges
  • 95ft / 29mTotal length
  • 11,172Total average daily traffic
  • 2,004Total average daily truck traffic
  • 11,172Total future (year 2036) average daily traffic
  • National Bridge Inventory (NBI) Registered Bridges for Northwood
  • No street view available for this location

New bridges in Northwood, IA - historical statistics
  • New bridges - historical statistics
  • 11940-1949
  • 41950-1959
  • 11960-1969
  • 11970-1979
  • 11980-1989
  • 11990-1999
  • 22010-2018
Reconstructed bridges in Northwood, IA - Historical Statistics
  • Reconstructed bridges - Historical Statistics
  • 12000-2009
  • 12010-2018
Average Bridge Truck Traffic in Northwood, IA
Bridge Condition - Deck
  • Bridge Condition - Deck
  • 30.0%Excellent
  • 20.0%Good
  • 40.0%Satisfactory
  • 10.0%Fair
Bridge Condition - Superstructure
  • Bridge Condition - Superstructure
  • 20.0%Excellent
  • 50.0%Good
  • 10.0%Satisfactory
  • 20.0%Fair
Bridge Condition - Substructure
  • Bridge Condition - Substructure
  • 10.0%Excellent
  • 40.0%Good
  • 10.0%Satisfactory
  • 40.0%Fair
Bridge Condition - Channel
  • Bridge Condition - Channel
  • 20.0%Excellent
  • 20.0%Very good
  • 50.0%Good
  • 10.0%Satisfactory
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Structure Number: 8795,  Location: 000000000 (Lat: 43.441472,  Lng: -93.223886),  Route carried "on" structure: City street ,  Year Built: 1959,  Status: Posted for load,  Structure Length: 2.74m (8.99ft),  Average Daily Traffic: 152 (year 1998),  Average Future Daily Traffic: 152 (year 2037),  Features Intersected: SHELL ROCK RIVER,  Facility Carried by Structure: 2ND AVE S
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 0.439,  Lanes on structure: 2,  Owner: City or Municipal Highway Agency,  Approaching Roadway Width: 0.7m (2.3ft),  Material/Design: Concrete continuous,  Design/Construction: Slab,  Number Of Spans In Main Unit: 7,  Length of Maximum Span: 4.3m (14.1ft),  Curb-To-Curb Width: 6.1m (20.0ft),  Out-to-Out Width: 6.7m (22.0ft)

Condition: Deck: Satisfactory,  Superstructure: Good,  Substructure: Good,  Channel: Good,  Operating Rating: 13.5 metric tons,  Method Used To Determine Operating Rating: Allowable Stress (AS),  Inventory Rating: 0.9 metric tons,  Method Used To Determine Inventory Rating: Allowable Stress (AS),  Structural Evaluation: High priority of replacement,  Deck Geometry: Meets minimum limits,  Waterway Adequacy: Equal to present minimum criteria,  Approach Roadway Alignment: Equal to present minimum criteria,  Bridge Posting: Required (Relationship of Operating Rating to Maximum Legal Load: 30.0 - 39.9% below),  Length Of Structure Improvement: 1.20m (3.94ft),  Designated Inspection Frequency: Every 24 months,  Inspection Date: November 2017,  Bridge Improvement Cost: $311,000,  Roadway Improvement Cost: $62,000,  Deck Structure Type: Concrete Cast-file-Place,  Wearing Surface/Protective System: Wearing Surface: Monolithic Concrete
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Structure Number: 8801,  Location: .58 m S of Central Ave (Lat: 43.435550,  Lng: -93.225753),  Route carried "on" structure: City street ,  Year Built: 2014,  Status: Open,  Structure Length: 2.48m (8.14ft),  Average Daily Traffic: 200 (year 2017),  Average Future Daily Traffic: 200 (year 2037),  Design Load: HL 93,  Features Intersected: DRAINAGE DITCH,  Facility Carried by Structure: 4TH ST
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 0.652,  Lanes on structure: 2,  Owner: City or Municipal Highway Agency,  Approaching Roadway Width: 93.0m (305.1ft),  Skew: 4 degrees,  Material/Design: Concrete continuous,  Design/Construction: Slab,  Number Of Spans In Main Unit: 3,  Length of Maximum Span: 9.4m (30.8ft),  Curb-To-Curb Width: 9.3m (30.5ft),  Out-to-Out Width: 10.1m (33.1ft)

Condition: Deck: Excellent,  Superstructure: Excellent,  Substructure: Excellent,  Channel: Excellent,  Operating Rating: 37.8 metric tons,  Method Used To Determine Operating Rating: Load Factor (LF),  Inventory Rating: 22.7 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: Superior to present desirable criteria,  Approach Roadway Alignment: Superior to present desirable criteria,  Designated Inspection Frequency: Every 24 months,  Inspection Date: November 2017,  Deck Structure Type: Concrete Cast-file-Place,  Wearing Surface/Protective System: Wearing Surface: Monolithic Concrete,  Deck Protection: Epoxy Coated Reinforcing
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Structure Number: 53971,  Location: 0.8 MI.N.OF SR S-34 (A34) (Lat: 43.398808,  Lng: -93.210653),  Route carried "on" structure: US 65,  Year Built: 1983,  Status: Open,  Structure Length: 5.85m (19.19ft),  Average Daily Traffic: 2,480 (year 2017),  Truck Traffic: 26%,  Average Future Daily Traffic: 2,480 (year 2037),  Design Load: HS 20,  Features Intersected: SHELLROCK RIVER
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 343.921,  Lanes on structure: 2,  Base Highway Network: Yes,  Owner: State Highway Agency,  Approaching Roadway Width: 146.0m (479.0ft),  Skew: 3 degrees,  Material/Design: Concrete continuous,  Design/Construction: Slab,  Number Of Spans In Main Unit: 4,  Length of Maximum Span: 16.2m (53.1ft),  Curb-To-Curb Width: 13.4m (44.0ft),  Out-to-Out Width: 14.4m (47.2ft)

Condition: Deck: Good,  Superstructure: Good,  Substructure: Good,  Channel: Good,  Operating Rating: 42.2 metric tons,  Method Used To Determine Operating Rating: Allowable Stress (AS),  Inventory Rating: 13.5 metric tons,  Method Used To Determine Inventory Rating: Allowable Stress (AS),  Structural Evaluation: Meets minimum limits,  Deck Geometry: Better than 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: August 2017,  Deck Structure Type: Concrete Cast-file-Place,  Wearing Surface/Protective System: Wearing Surface: Monolithic Concrete,  Deck Protection: Epoxy Coated Reinforcing
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Structure Number: 53981,  Location: 1.1 MI N JCT. SR 105 (Lat: 43.459908,  Lng: -93.220961),  Route carried "on" structure: US 65,  Year Built: 1990,  Status: Open,  Structure Length: 1.00m (3.28ft),  Average Daily Traffic: 2,380 (year 2017),  Truck Traffic: 27%,  Average Future Daily Traffic: 2,380 (year 2036),  Design Load: HS 20,  Features Intersected: UP RR
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 351.027,  Lanes on structure: 2,  Base Highway Network: Yes,  Owner: State Highway Agency,  Approaching Roadway Width: 134.0m (439.6ft),  Skew: 4 degrees,  Material/Design: Steel continuous,  Design/Construction: Stringer/Multi-beam,  Number Of Spans In Main Unit: 3,  Length of Maximum Span: 38.1m (125.0ft),  Curb-To-Curb Width: 13.4m (44.0ft),  Out-to-Out Width: 14.4m (47.2ft)

Condition: Deck: Satisfactory,  Superstructure: Good,  Substructure: Good,  Operating Rating: 56.7 metric tons,  Method Used To Determine Operating Rating: Load Factor (LF),  Inventory Rating: 3.4 metric tons,  Method Used To Determine Inventory Rating: Load Factor (LF),  Structural Evaluation: Better than present minimum criteria,  Deck Geometry: Better than present minimum criteria,  Underclear: Superior to present desirable criteria,  Approach Roadway Alignment: Equal to present desirable criteria,  Designated Inspection Frequency: Every 24 months,  Inspection Date: July 2016,  Deck Structure Type: Concrete Cast-file-Place,  Wearing Surface/Protective System: Wearing Surface: Monolithic Concrete,  Deck Protection: Epoxy Coated Reinforcing
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Structure Number: 5413,  Location: 100213503 (Lat: 43.444289,  Lng: -93.281831),  Route carried "on" structure: County highway ,  Year Built: 1949,  Year Reconstructed: 2016,  Status: Open,  Structure Length: 1.07m (3.51ft),  Average Daily Traffic: 1,700 (year 2017),  Truck Traffic: 22%,  Average Future Daily Traffic: 1,700 (year 2037),  Design Load: H 20,  Features Intersected: DRAINAGE DITCH,  Facility Carried by Structure: CO RD 105
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 19.316,  Lanes on structure: 2,  Owner: County Highway Agency,  Approaching Roadway Width: 67.0m (219.8ft),  Material/Design: Steel,  Design/Construction: Stringer/Multi-beam,  Number Of Spans In Main Unit: 1,  Length of Maximum Span: 9.8m (32.2ft),  Curb or Sidewalk Widths: Left: 0.3m (1.0ft),  Right: 0.3m (1.0ft),  Curb-To-Curb Width: 9.1m (29.9ft),  Out-to-Out Width: 10.6m (34.8ft)

Condition: Deck: Excellent,  Superstructure: Good,  Substructure: Fair,  Channel: Good,  Operating Rating: 40.5 metric tons,  Method Used To Determine Operating Rating: Allowable Stress (AS),  Inventory Rating: 23.3 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: Better than present minimum criteria,  Approach Roadway Alignment: Equal to present desirable criteria,  Length Of Structure Improvement: 0.57m (1.87ft),  Designated Inspection Frequency: Every 24 months,  Inspection Date: November 2017,  Bridge Improvement Cost: $160,000,  Roadway Improvement Cost: $32,000,  Deck Structure Type: Concrete Cast-file-Place,  Wearing Surface/Protective System: Wearing Surface: Monolithic Concrete
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Structure Number: 5417,  Location: 100203201 (Lat: 43.444250,  Lng: -93.237981),  Route carried "on" structure: County highway ,  Year Built: 1950,  Status: Open,  Structure Length: 1.98m (6.50ft),  Average Daily Traffic: 1,860 (year 2017),  Truck Traffic: 17%,  Average Future Daily Traffic: 1,860 (year 2037),  Design Load: H 20,  Features Intersected: DRAINAGE DITCH,  Facility Carried by Structure: CO RD 105
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 22.865,  Lanes on structure: 2,  Owner: County Highway Agency,  Approaching Roadway Width: 67.0m (219.8ft),  Skew: 3 degrees,  Material/Design: Steel,  Design/Construction: Stringer/Multi-beam,  Number Of Spans In Main Unit: 1,  Length of Maximum Span: 18.9m (62.0ft),  Curb or Sidewalk Widths: Left: 0.3m (1.0ft),  Right: 0.3m (1.0ft),  Curb-To-Curb Width: 9.1m (29.9ft),  Out-to-Out Width: 10.6m (34.8ft)

Condition: Deck: Satisfactory,  Superstructure: Fair,  Substructure: Fair,  Channel: Satisfactory,  Operating Rating: 37.7 metric tons,  Method Used To Determine Operating Rating: Allowable Stress (AS),  Inventory Rating: 19.8 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,  Length Of Structure Improvement: 0.89m (2.92ft),  Designated Inspection Frequency: Every 24 months,  Inspection Date: November 2017,  Bridge Improvement Cost: $250,000,  Roadway Improvement Cost: $50,000,  Deck Structure Type: Concrete Cast-file-Place,  Wearing Surface/Protective System: Wearing Surface: Monolithic Concrete
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Structure Number: 5418,  Location: 000000000 (Lat: 43.444158,  Lng: -93.230267),  Route carried "on" structure: City street ,  Year Built: 1950,  Status: Open,  Structure Length: 3.78m (12.40ft),  Average Daily Traffic: 1,860 (year 2017),  Average Future Daily Traffic: 1,860 (year 2037),  Design Load: H 20,  Features Intersected: SHELLROCK RIVER,  Facility Carried by Structure: CENTRAL AVE N
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 0.462,  Lanes on structure: 2,  Owner: City or Municipal Highway Agency,  Approaching Roadway Width: 104.0m (341.2ft),  Material/Design: Steel continuous,  Design/Construction: Stringer/Multi-beam,  Number Of Spans In Main Unit: 3,  Length of Maximum Span: 14.3m (46.9ft),  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: 9.8m (32.2ft)

Condition: Deck: Fair,  Superstructure: Fair,  Substructure: Satisfactory,  Channel: Good,  Operating Rating: 49.5 metric tons,  Method Used To Determine Operating Rating: Load Factor (LF),  Inventory Rating: 3.3 metric tons,  Method Used To Determine Inventory Rating: Load Factor (LF),  Structural Evaluation: Somewhat better than minimum adequacy,  Deck Geometry: Meets minimum limits,  Waterway Adequacy: Equal to present desirable criteria,  Approach Roadway Alignment: Equal to present desirable criteria,  Designated Inspection Frequency: Every 24 months,  Inspection Date: November 2017,  Deck Structure Type: Concrete Cast-file-Place,  Wearing Surface/Protective System: Wearing Surface: Monolithic Concrete
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Structure Number: 35605,  Location: 099200901 (Lat: 43.415086,  Lng: -93.220569),  Route carried "on" structure: County highway ,  Year Built: 1964,  Status: Open,  Structure Length: 5.15m (16.90ft),  Average Daily Traffic: 90 (year 2017),  Average Future Daily Traffic: 90 (year 2037),  Design Load: H 20,  Features Intersected: SHELLROCK RIVER,  Facility Carried by Structure: 450TH
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 14.436,  Lanes on structure: 2,  Owner: County Highway Agency,  Approaching Roadway Width: 104.0m (341.2ft),  Material/Design: Prestressed concrete,  Design/Construction: Stringer/Multi-beam,  Number Of Spans In Main Unit: 3,  Length of Maximum Span: 17.1m (56.1ft),  Curb-To-Curb Width: 8.5m (27.9ft),  Out-to-Out Width: 9.2m (30.2ft)

Condition: Deck: Good,  Superstructure: Good,  Substructure: Good,  Channel: Very good,  Operating Rating: 49.4 metric tons,  Method Used To Determine Operating Rating: Load Factor (LF),  Inventory Rating: 23.3 metric tons,  Method Used To Determine Inventory Rating: Load Factor (LF),  Structural Evaluation: Equal to present minimum criteria,  Deck Geometry: Better than 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: November 2017,  Deck Structure Type: Concrete Cast-file-Place,  Wearing Surface/Protective System: Wearing Surface: Monolithic Concrete
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Structure Number: 356431,  Location: 0.7 Mi N Marks Hill Rd (Lat: 43.476100,  Lng: -93.260839),  Route carried "on" structure: County highway ,  Year Built: 2016,  Status: Open,  Structure Length: 1.03m (3.38ft),  Average Daily Traffic: 90 (year 2013),  Truck Traffic: 9%,  Average Future Daily Traffic: 90 (year 2037),  Design Load: HL 93,  Features Intersected: GOOSE CREEK,  Facility Carried by Structure: MALLARD AVE
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 19.709,  Lanes on structure: 2,  Owner: County Highway Agency,  Approaching Roadway Width: 124.0m (406.8ft),  Material/Design: Concrete,  Design/Construction: Culvert,  Length of Maximum Span: 0.3m (1.0ft)

Condition: Channel: Excellent,  Culverts: Excellent,  Operating Rating: 42.1 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: 32.4 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: Equal to present desirable criteria,  Waterway Adequacy: Superior to present desirable criteria,  Approach Roadway Alignment: Superior to present desirable criteria,  Designated Inspection Frequency: Every 24 months,  Inspection Date: November 2017
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Structure Number: 35644,  Location: 100201807 (Lat: 43.480528,  Lng: -93.257406),  Route carried "on" structure: County highway ,  Year Built: 1955,  Status: Posted for load-capacity,  Structure Length: 3.87m (12.70ft),  Average Daily Traffic: 100 (year 2013),  Average Future Daily Traffic: 100 (year 2037),  Design Load: H 15,  Features Intersected: SHELLROCK RIVER,  Facility Carried by Structure: 495TH
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 1.883,  Lanes on structure: 2,  Owner: County Highway Agency,  Approaching Roadway Width: 73.0m (239.5ft),  Material/Design: Steel continuous,  Design/Construction: Stringer/Multi-beam,  Number Of Spans In Main Unit: 3,  Length of Maximum Span: 14.9m (48.9ft),  Curb-To-Curb Width: 6.1m (20.0ft),  Out-to-Out Width: 6.7m (22.0ft)

Condition: Deck: Satisfactory,  Superstructure: Satisfactory,  Substructure: Fair,  Channel: Very good,  Operating Rating: 25.1 metric tons,  Method Used To Determine Operating Rating: Allowable Stress (AS),  Inventory Rating: 15.2 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 desirable criteria,  Approach Roadway Alignment: Equal to present desirable criteria,  Bridge Posting: Required (Relationship of Operating Rating to Maximum Legal Load: 10.0 - 19.9% below),  Length Of Structure Improvement: 1.58m (5.18ft),  Designated Inspection Frequency: Every 24 months,  Inspection Date: November 2017,  Bridge Improvement Cost: $443,000,  Roadway Improvement Cost: $89,000,  Deck Structure Type: Concrete Cast-file-Place,  Wearing Surface/Protective System: Wearing Surface: Monolithic Concrete
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Structure Number: 35647,  Location: 100203102 (Lat: 43.443867,  Lng: -93.260906),  Route carried "on" structure: County highway ,  Year Built: 1973,  Year Reconstructed: 2013,  Status: Open,  Structure Length: 0.94m (3.08ft),  Average Daily Traffic: 260 (year 2013),  Truck Traffic: 8%,  Average Future Daily Traffic: 260 (year 2037),  Design Load: H 20,  Features Intersected: DRAINAGE DITCH,  Facility Carried by Structure: MALLARD AVE
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 16.129,  Lanes on structure: 2,  Owner: County Highway Agency,  Approaching Roadway Width: 91.0m (298.6ft),  Material/Design: Concrete,  Design/Construction: Channel Beam,  Number Of Spans In Main Unit: 1,  Length of Maximum Span: 9.1m (29.9ft),  Curb-To-Curb Width: 9.3m (30.5ft),  Out-to-Out Width: 9.4m (30.8ft)

Condition: Deck: Excellent,  Superstructure: Excellent,  Substructure: Fair,  Channel: Good,  Operating Rating: 47.3 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: 36.6 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: Superior to present desirable criteria,  Length Of Structure Improvement: 0.53m (1.74ft),  Designated Inspection Frequency: Every 24 months,  Inspection Date: November 2017,  Bridge Improvement Cost: $114,000,  Roadway Improvement Cost: $17,000,  Deck Structure Type: Concrete Cast-file-Place,  Wearing Surface/Protective System: Wearing Surface: Monolithic Concrete
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