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


  • National Bridge Inventory (NBI) Statistics
  • 11Number of bridges
  • 135ft / 40.9mTotal length
  • 1,355Total average daily traffic
  • 288Total average daily truck traffic
  • 1,355Total future (year 2039) average daily traffic
  • National Bridge Inventory (NBI) Registered Bridges for Oto
  • No street view available for this location

New bridges in Oto, IA - historical statistics
  • New bridges - historical statistics
  • 11940-1949
  • 21950-1959
  • 11960-1969
  • 11980-1989
  • 41990-1999
  • 22010-2019
Bridge Condition - Deck
  • Bridge Condition - Deck
  • 40.0%Very good
  • 20.0%Good
  • 20.0%Satisfactory
  • 20.0%Fair
Bridge Condition - Superstructure
  • Bridge Condition - Superstructure
  • 30.0%Very good
  • 30.0%Good
  • 10.0%Satisfactory
  • 30.0%Fair
Bridge Condition - Substructure
  • Bridge Condition - Substructure
  • 30.0%Very good
  • 30.0%Good
  • 10.0%Fair
  • 20.0%Poor
  • 10.0%Serious
Bridge Condition - Channel
  • Bridge Condition - Channel
  • 9.1%Very good
  • 45.5%Good
  • 18.2%Satisfactory
  • 18.2%Fair
  • 9.1%Poor
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Structure Number: 53131,  Location: 2.2 mi S of jct SR D54 (Lat: 42.261936,  Lng: -95.920061),  Route carried "on" structure: State highway 31,  Year Built: 1988,  Status: Open,  Structure Length: 2.23m (7.32ft),  Average Daily Traffic: 770 (year 2020),  Truck Traffic: 28%,  Average Future Daily Traffic: 770 (year 2040),  Design Load: HS 20,  Features Intersected: DRY CREEK
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 3.935,  Lanes on structure: 2,  Base Highway Network: Yes,  Owner: State Highway Agency,  Approaching Roadway Width: 7.9m (25.9ft),  Material/Design: Concrete continuous,  Design/Construction: Slab,  Number Of Spans In Main Unit: 3,  Length of Maximum Span: 8.5m (27.9ft),  Curb-To-Curb Width: 11.0m (36.1ft),  Out-to-Out Width: 11.9m (39.0ft)

Condition: Deck: Good,  Superstructure: Good,  Substructure: Very good,  Channel: Good,  Operating Rating: 69.8 metric tons,  Method Used To Determine Operating Rating: Load Factor (LF),  Inventory Rating: 41.7 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,  Waterway Adequacy: Better than present minimum criteria,  Approach Roadway Alignment: Better than present minimum criteria,  Designated Inspection Frequency: Every 24 months,  Inspection Date: November 2020,  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: 350371,  Location: 086430403 (Lat: 42.298489,  Lng: -95.857436),  Route carried "on" structure: County highway ,  Year Built: 1997,  Status: Open,  Structure Length: 3.51m (11.52ft),  Average Daily Traffic: 5 (year 2019),  Average Future Daily Traffic: 5 (year 2041),  Features Intersected: MILLER CREEK,  Facility Carried by Structure: LOCAL
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 32.699,  Lanes on structure: 2,  Owner: County Highway Agency,  Approaching Roadway Width: 8.2m (26.9ft),  Material/Design: Steel,  Design/Construction: Stringer/Multi-beam,  Number Of Spans In Main Unit: 3,  Length of Maximum Span: 14.3m (46.9ft),  Curb-To-Curb Width: 7.5m (24.6ft),  Out-to-Out Width: 7.5m (24.6ft)

Condition: Deck: Good,  Superstructure: Good,  Substructure: Good,  Channel: Good,  Operating Rating: 42.8 metric tons,  Method Used To Determine Operating Rating: Load Factor (LF),  Inventory Rating: 25.7 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: Better than present minimum criteria,  Approach Roadway Alignment: Better than present minimum criteria,  Length Of Structure Improvement: 11.50m (37.73ft),  Designated Inspection Frequency: Every 24 months,  Inspection Date: May 2021,  Bridge Improvement Cost: $15,000,  Roadway Improvement Cost: $2,000,  Deck Structure Type: Wood or Timber,  Wearing Surface/Protective System: Wearing Surface: Gravel
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Structure Number: 350381,  Location: 086430506 (Lat: 42.287511,  Lng: -95.884358),  Route carried "on" structure: County highway ,  Year Built: 2016,  Status: Open,  Structure Length: 2.83m (9.28ft),  Average Daily Traffic: 40 (year 2019),  Average Future Daily Traffic: 40 (year 2039),  Design Load: HL 93,  Features Intersected: MILLER CREEK,  Facility Carried by Structure: MORGAN TRAIL
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 0.406,  Lanes on structure: 2,  Owner: County Highway Agency,  Approaching Roadway Width: 8.5m (27.9ft),  Skew: 3 degrees,  Material/Design: Prestressed concrete,  Design/Construction: Stringer/Multi-beam,  Number Of Spans In Main Unit: 1,  Length of Maximum Span: 27.4m (89.9ft),  Curb or Sidewalk Widths: Left: 0.4m (1.3ft),  Right: 0.4m (1.3ft),  Curb-To-Curb Width: 9.3m (30.5ft),  Out-to-Out Width: 10.1m (33.1ft)

Condition: Deck: Very good,  Superstructure: Very good,  Substructure: Very good,  Channel: 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: Better than present minimum criteria,  Waterway Adequacy: Equal to present desirable criteria,  Approach Roadway Alignment: Equal to present desirable criteria,  Designated Inspection Frequency: Every 48 months,  Inspection Date: July 2019,  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: 350391,  Location: 086430406 (Lat: 42.287250,  Lng: -95.864814),  Route carried "on" structure: County highway ,  Year Built: 1991,  Status: Open,  Structure Length: 5.09m (16.70ft),  Average Daily Traffic: 45 (year 2019),  Average Future Daily Traffic: 45 (year 2039),  Design Load: HS 20,  Features Intersected: MILLER CREEK,  Facility Carried by Structure: LOCAL
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 8.069,  Lanes on structure: 2,  Owner: County Highway Agency,  Approaching Roadway Width: 8.5m (27.9ft),  Skew: 1 degrees,  Material/Design: Prestressed concrete continuous,  Design/Construction: Stringer/Multi-beam,  Number Of Spans In Main Unit: 3,  Length of Maximum Span: 18.0m (59.1ft),  Curb-To-Curb Width: 9.1m (29.9ft),  Out-to-Out Width: 10.1m (33.1ft)

Condition: Deck: Very good,  Superstructure: Very good,  Substructure: Good,  Channel: Good,  Operating Rating: 64.3 metric tons,  Method Used To Determine Operating Rating: Load Factor (LF),  Inventory Rating: 39.5 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,  Waterway Adequacy: Equal to present desirable criteria,  Approach Roadway Alignment: Equal to present desirable criteria,  Length Of Structure Improvement: 16.70m (54.79ft),  Designated Inspection Frequency: Every 48 months,  Inspection Date: July 2019,  Bridge Improvement Cost: $15,000,  Roadway Improvement Cost: $2,000,  Deck Structure Type: Concrete Cast-file-Place,  Wearing Surface/Protective System: Wearing Surface: Monolithic Concrete
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Structure Number: 350405,  Location: 086430703 (Lat: 42.283856,  Lng: -95.889686),  Route carried "on" structure: County highway ,  Year Built: 1966,  Status: Open,  Structure Length: 8.60m (28.22ft),  Average Daily Traffic: 320 (year 2019),  Truck Traffic: 23%,  Average Future Daily Traffic: 320 (year 2041),  Design Load: H 20,  Features Intersected: LITTLE SIOUX RIVER,  Facility Carried by Structure: FM
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 31.704,  Lanes on structure: 2,  Owner: County Highway Agency,  Approaching Roadway Width: 11.6m (38.1ft),  Material/Design: Steel continuous,  Design/Construction: Stringer/Multi-beam,  Number Of Spans In Main Unit: 4,  Length of Maximum Span: 23.8m (78.1ft),  Curb-To-Curb Width: 8.5m (27.9ft),  Out-to-Out Width: 9.1m (29.9ft)

Condition: Deck: Fair,  Superstructure: Fair,  Substructure: Fair,  Channel: Poor,  Operating Rating: 39.2 metric tons,  Method Used To Determine Operating Rating: Allowable Stress (AS),  Inventory Rating: 27.1 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,  Waterway Adequacy: Meets minimum limits,  Approach Roadway Alignment: Equal to present desirable criteria,  Length Of Structure Improvement: 28.20m (92.52ft),  Designated Inspection Frequency: Every 24 months,  Inspection Date: May 2021,  Bridge Improvement Cost: $15,000,  Roadway Improvement Cost: $2,000,  Deck Structure Type: Concrete Cast-file-Place,  Wearing Surface/Protective System: Wearing Surface: Monolithic Concrete
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Structure Number: 350421,  Location: 086430805 (Lat: 42.283919,  Lng: -95.867106),  Route carried "on" structure: County highway ,  Year Built: 1991,  Status: Open,  Structure Length: 1.07m (3.51ft),  Average Daily Traffic: 45 (year 2019),  Average Future Daily Traffic: 45 (year 2039),  Design Load: HS 20,  Features Intersected: MILLER CREEK,  Facility Carried by Structure: LOCAL
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 33.566,  Lanes on structure: 2,  Owner: County Highway Agency,  Approaching Roadway Width: 9.1m (29.9ft),  Skew: 4 degrees,  Material/Design: Concrete continuous,  Design/Construction: Culvert,  Number Of Spans In Main Unit: 2,  Length of Maximum Span: 5.5m (18.0ft)

Condition: Channel: Satisfactory,  Culverts: Good,  Operating Rating: 44.1 metric tons,  Method Used To Determine Operating Rating: Assigned rating based on Load Factor Design (LFD) reported in metric tons,  Inventory Rating: 32.7 metric tons,  Method Used To Determine Inventory Rating: Assigned rating based on Load Factor Design (LFD) reported in metric tons,  Structural Evaluation: Better than present minimum criteria,  Waterway Adequacy: Better than present minimum criteria,  Approach Roadway Alignment: Equal to present desirable criteria,  Length Of Structure Improvement: 3.50m (11.48ft),  Designated Inspection Frequency: Every 48 months,  Inspection Date: July 2019,  Bridge Improvement Cost: $15,000,  Roadway Improvement Cost: $2,000
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Structure Number: 35043,  Location: 086430906 (Lat: 42.279606,  Lng: -95.850847),  Route carried "on" structure: County highway ,  Year Built: 1947,  Year Reconstructed: 2002,  Status: Open,  Structure Length: 1.19m (3.90ft),  Average Daily Traffic: 50 (year 2019),  Average Future Daily Traffic: 50 (year 2041),  Features Intersected: STREAM,  Facility Carried by Structure: MILLERS PATH
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 4.608,  Lanes on structure: 2,  Owner: County Highway Agency,  Approaching Roadway Width: 7.6m (24.9ft),  Material/Design: Steel continuous,  Design/Construction: Stringer/Multi-beam,  Number Of Spans In Main Unit: 2,  Length of Maximum Span: 5.8m (19.0ft),  Curb-To-Curb Width: 6.7m (22.0ft),  Out-to-Out Width: 6.8m (22.3ft)

Condition: Deck: Satisfactory,  Superstructure: Fair,  Substructure: Poor,  Channel: Fair,  Operating Rating: 52.6 metric tons,  Method Used To Determine Operating Rating: Allowable Stress (AS),  Inventory Rating: 35.0 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: Somewhat better than minimum adequacy,  Approach Roadway Alignment: Somewhat better than minimum adequacy,  Length Of Structure Improvement: 3.90m (12.80ft),  Designated Inspection Frequency: Every 24 months,  Inspection Date: May 2021,  Bridge Improvement Cost: $15,000,  Roadway Improvement Cost: $2,000,  Deck Structure Type: Wood or Timber,  Wearing Surface/Protective System: Wearing Surface: Gravel
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Structure Number: 350531,  Location: 0864318 (Lat: 42.266539,  Lng: -95.893950),  Route carried "on" structure: County highway ,  Year Built: 1994,  Status: Open,  Structure Length: 10.70m (35.10ft),  Average Daily Traffic: 45 (year 2019),  Average Future Daily Traffic: 45 (year 2041),  Design Load: HS 20,  Features Intersected: LITTLE SIOUX RIVER,  Facility Carried by Structure: LOCAL
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 6.021,  Lanes on structure: 2,  Owner: County Highway Agency,  Approaching Roadway Width: 9.1m (29.9ft),  Skew: 2 degrees,  Material/Design: Steel continuous,  Design/Construction: Girder and Floorbeam System,  Number Of Spans In Main Unit: 3,  Length of Maximum Span: 41.5m (136.2ft),  Curb-To-Curb Width: 9.1m (29.9ft),  Out-to-Out Width: 10.1m (33.1ft)

Condition: Deck: Very good,  Superstructure: Good,  Substructure: Good,  Channel: Good,  Operating Rating: 40.8 metric tons,  Method Used To Determine Operating Rating: Assigned rating based on Load Factor Design (LFD) reported in metric tons,  Inventory Rating: 32.7 metric tons,  Method Used To Determine Inventory Rating: Assigned rating based on Load Factor Design (LFD) reported in metric tons,  Structural Evaluation: Better than present minimum criteria,  Deck Geometry: Better than present minimum criteria,  Waterway Adequacy: Equal to present desirable criteria,  Approach Roadway Alignment: Better than present minimum criteria,  Length Of Structure Improvement: 35.10m (115.16ft),  Designated Inspection Frequency: Every 24 months,  Inspection Date: May 2021,  Bridge Improvement Cost: $15,000,  Roadway Improvement Cost: $2,000,  Deck Structure Type: Concrete Cast-file-Place,  Wearing Surface/Protective System: Wearing Surface: Monolithic Concrete
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Structure Number: 350781,  Location: 086441303 (Lat: 42.265950,  Lng: -95.922075),  Route carried "on" structure: County highway ,  Year Built: 2018,  Status: Open,  Structure Length: 1.22m (4.00ft),  Average Daily Traffic: 25 (year 2019),  Average Future Daily Traffic: 25 (year 2041),  Design Load: HL 93,  Features Intersected: STREAM,  Facility Carried by Structure: LEE AVE
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 5.842,  Lanes on structure: 2,  Owner: County Highway Agency,  Approaching Roadway Width: 7.3m (24.0ft),  Material/Design: Concrete,  Design/Construction: Stringer/Multi-beam,  Number Of Spans In Main Unit: 1,  Length of Maximum Span: 11.9m (39.0ft),  Curb-To-Curb Width: 7.7m (25.3ft),  Out-to-Out Width: 7.8m (25.6ft)

Condition: Deck: Very good,  Superstructure: Very good,  Substructure: Very good,  Channel: Very good,  Operating Rating: 45.0 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: 34.7 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 minimum criteria,  Designated Inspection Frequency: Every 48 months,  Inspection Date: May 2021,  Deck Structure Type: Concrete Precast Panels,  Wearing Surface/Protective System: Wearing Surface: Monolithic Concrete
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Structure Number: 35184,  Location: 087433406 (Lat: 42.312178,  Lng: -95.840503),  Route carried "on" structure: County highway ,  Year Built: 1951,  Status: Posted for load,  Structure Length: 3.14m (10.30ft),  Average Daily Traffic: 5 (year 2019),  Average Future Daily Traffic: 5 (year 2041),  Features Intersected: MILLER CREEK,  Facility Carried by Structure: LOCAL
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 7.491,  Lanes on structure: 2,  Owner: County Highway Agency,  Approaching Roadway Width: 8.2m (26.9ft),  Material/Design: Steel,  Design/Construction: Stringer/Multi-beam,  Number Of Spans In Main Unit: 3,  Length of Maximum Span: 12.5m (41.0ft),  Curb-To-Curb Width: 6.1m (20.0ft),  Out-to-Out Width: 6.7m (22.0ft)

Condition: Deck: Fair,  Superstructure: Satisfactory,  Substructure: Serious,  Channel: Satisfactory,  Operating Rating: 5.4 metric tons,  Method Used To Determine Operating Rating: Field evaluation and documented engineering judgment,  Structural Evaluation: High priority of replacement,  Deck Geometry: Somewhat better than minimum adequacy,  Waterway Adequacy: Better than present minimum criteria,  Approach Roadway Alignment: Better than present minimum criteria,  Bridge Posting: Required (Relationship of Operating Rating to Maximum Legal Load: > 39.9% below),  Length Of Structure Improvement: 13.90m (45.60ft),  Designated Inspection Frequency: Every 12 months,  Inspection Date: June 2021,  Bridge Improvement Cost: $375,000,  Roadway Improvement Cost: $38,000,  Deck Structure Type: Concrete Cast-file-Place,  Wearing Surface/Protective System: Wearing Surface: Monolithic Concrete
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Structure Number: 35217,  Location: 087442403 (Lat: 42.338411,  Lng: -95.918281),  Route carried "on" structure: County highway ,  Year Built: 1950,  Status: Posted for load,  Structure Length: 1.28m (4.20ft),  Average Daily Traffic: 5 (year 2019),  Average Future Daily Traffic: 5 (year 2041),  Features Intersected: STREAM,  Facility Carried by Structure: LOCAL
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 3.452,  Lanes on structure: 2,  Owner: County Highway Agency,  Approaching Roadway Width: 8.5m (27.9ft),  Material/Design: Steel,  Design/Construction: Stringer/Multi-beam,  Number Of Spans In Main Unit: 1,  Length of Maximum Span: 12.5m (41.0ft),  Curb-To-Curb Width: 5.2m (17.1ft),  Out-to-Out Width: 5.4m (17.7ft)

Condition: Deck: Satisfactory,  Superstructure: Fair,  Substructure: Poor,  Channel: Fair,  Operating Rating: 16.8 metric tons,  Method Used To Determine Operating Rating: Allowable Stress (AS),  Inventory Rating: 10.4 metric tons,  Method Used To Determine Inventory Rating: Allowable Stress (AS),  Structural Evaluation: High priority of replacement,  Deck Geometry: High priority of corrective action,  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: > 39.9% below),  Length Of Structure Improvement: 6.50m (21.33ft),  Designated Inspection Frequency: Every 24 months,  Inspection Date: June 2021,  Bridge Improvement Cost: $175,000,  Roadway Improvement Cost: $18,000,  Deck Structure Type: Wood or Timber,  Wearing Surface/Protective System: Wearing Surface: Gravel
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