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


  • National Bridge Inventory (NBI) Statistics
  • 12Number of bridges
  • 167ft / 50.7mTotal length
  • 3,030Total average daily traffic
  • 275Total average daily truck traffic
  • 3,030Total future (year 2041) average daily traffic
  • National Bridge Inventory (NBI) Registered Bridges for Riverton
  • No street view available for this location

New bridges in Riverton, IA - historical statistics
  • New bridges - historical statistics
  • 11920-1929
  • 21950-1959
  • 21960-1969
  • 51970-1979
  • 21980-1989
Bridge Condition - Deck
  • Bridge Condition - Deck
  • 63.6%Satisfactory
  • 27.3%Fair
  • 9.1%Poor
Bridge Condition - Superstructure
  • Bridge Condition - Superstructure
  • 9.1%Very good
  • 9.1%Good
  • 36.4%Satisfactory
  • 45.5%Fair
Bridge Condition - Substructure
  • Bridge Condition - Substructure
  • 36.4%Good
  • 18.2%Satisfactory
  • 27.3%Fair
  • 9.1%Poor
  • 9.1%Critical
Bridge Condition - Channel
  • Bridge Condition - Channel
  • 16.7%Good
  • 33.3%Satisfactory
  • 25.0%Fair
  • 16.7%Poor
  • 8.3%Serious
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Structure Number: 25441,  Location: 068413001 (Lat: 40.687078,  Lng: -95.600525),  Route carried "on" structure: County highway ,  Year Built: 1975,  Status: Open,  Structure Length: 7.50m (24.61ft),  Average Daily Traffic: 870 (year 2016),  Truck Traffic: 9%,  Average Future Daily Traffic: 870 (year 2041),  Design Load: H 20,  Features Intersected: W NISHWABOTNA RIVER,  Facility Carried by Structure: 250 STREET
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 6.592,  Lanes on structure: 2,  Owner: County Highway Agency,  Approaching Roadway Width: 9.4m (30.8ft),  Material/Design: Prestressed concrete,  Design/Construction: Stringer/Multi-beam,  Number Of Spans In Main Unit: 3,  Length of Maximum Span: 25.0m (82.0ft),  Curb-To-Curb Width: 9.1m (29.9ft),  Out-to-Out Width: 9.8m (32.2ft)

Condition: Deck: Satisfactory,  Superstructure: Very good,  Substructure: Good,  Channel: Satisfactory,  Operating Rating: 77.2 metric tons,  Method Used To Determine Operating Rating: Allowable Stress (AS),  Inventory Rating: 30.8 metric tons,  Method Used To Determine Inventory Rating: Allowable Stress (AS),  Structural Evaluation: Better than present minimum criteria,  Deck Geometry: Equal to present minimum criteria,  Waterway Adequacy: Meets minimum limits,  Approach Roadway Alignment: Equal to present desirable criteria,  Length Of Structure Improvement: 28.00m (91.86ft),  Designated Inspection Frequency: Every 24 months,  Inspection Date: May 2021,  Bridge Improvement Cost: $800,000,  Roadway Improvement Cost: $40,000,  Deck Structure Type: Concrete Cast-file-Place,  Wearing Surface/Protective System: Wearing Surface: Monolithic Concrete
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Structure Number: 25451,  Location: 068413001 (Lat: 40.687014,  Lng: -95.589664),  Route carried "on" structure: County highway ,  Year Built: 1975,  Status: Open,  Structure Length: 3.14m (10.30ft),  Average Daily Traffic: 870 (year 2016),  Truck Traffic: 9%,  Average Future Daily Traffic: 870 (year 2041),  Design Load: H 20,  Features Intersected: NISHNA RIVER OVERFLOW,  Facility Carried by Structure: 250 STREET
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 7.511,  Lanes on structure: 2,  Owner: County Highway Agency,  Approaching Roadway Width: 9.4m (30.8ft),  Material/Design: Concrete continuous,  Design/Construction: Slab,  Number Of Spans In Main Unit: 3,  Length of Maximum Span: 11.9m (39.0ft),  Curb-To-Curb Width: 9.1m (29.9ft),  Out-to-Out Width: 10.1m (33.1ft)

Condition: Deck: Satisfactory,  Superstructure: Satisfactory,  Substructure: Good,  Channel: Good,  Operating Rating: 49.8 metric tons,  Method Used To Determine Operating Rating: Allowable Stress (AS),  Inventory Rating: 30.0 metric tons,  Method Used To Determine Inventory Rating: Allowable Stress (AS),  Structural Evaluation: Equal to present minimum criteria,  Deck Geometry: Equal to present minimum criteria,  Waterway Adequacy: High priority of corrective action,  Approach Roadway Alignment: Equal to present desirable criteria,  Length Of Structure Improvement: 13.00m (42.65ft),  Designated Inspection Frequency: Every 24 months,  Inspection Date: May 2021,  Bridge Improvement Cost: $340,000,  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: 25461,  Location: 068412901 (Lat: 40.686994,  Lng: -95.578808),  Route carried "on" structure: County highway ,  Year Built: 1975,  Status: Open,  Structure Length: 9.81m (32.19ft),  Average Daily Traffic: 870 (year 2016),  Truck Traffic: 9%,  Average Future Daily Traffic: 870 (year 2041),  Design Load: H 20,  Features Intersected: E NISHNABOTNA RIVER,  Facility Carried by Structure: 250 STREET
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 8.428,  Lanes on structure: 2,  Owner: County Highway Agency,  Approaching Roadway Width: 9.4m (30.8ft),  Skew: 3 degrees,  Material/Design: Prestressed concrete,  Design/Construction: Stringer/Multi-beam,  Number Of Spans In Main Unit: 4,  Length of Maximum Span: 25.0m (82.0ft),  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: 9.8m (32.2ft)

Condition: Deck: Satisfactory,  Superstructure: Satisfactory,  Substructure: Good,  Channel: Satisfactory,  Operating Rating: 73.9 metric tons,  Method Used To Determine Operating Rating: Allowable Stress (AS),  Inventory Rating: 30.8 metric tons,  Method Used To Determine Inventory Rating: Allowable Stress (AS),  Structural Evaluation: Equal to present minimum criteria,  Deck Geometry: Equal to present minimum criteria,  Waterway Adequacy: Meets minimum limits,  Approach Roadway Alignment: Equal to present desirable criteria,  Length Of Structure Improvement: 35.00m (114.83ft),  Designated Inspection Frequency: Every 24 months,  Inspection Date: May 2021,  Bridge Improvement Cost: $1,000,000,  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: 158891,  Location: 067410401 (Lat: 40.654244,  Lng: -95.555383),  Route carried "on" structure: County highway ,  Year Built: 1982,  Status: Open,  Structure Length: 0.91m (2.99ft),  Average Daily Traffic: 10 (year 2016),  Average Future Daily Traffic: 10 (year 2041),  Features Intersected: MILL CREEK,  Facility Carried by Structure: 270 STREET
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 8.332,  Lanes on structure: 2,  Owner: County Highway Agency,  Approaching Roadway Width: 7.9m (25.9ft),  Material/Design: Steel,  Design/Construction: Culvert,  Number Of Spans In Main Unit: 1,  Length of Maximum Span: 9.1m (29.9ft)

Condition: Channel: Fair,  Culverts: Good,  Operating Rating: 44.4 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: Better than present minimum criteria,  Approach Roadway Alignment: Equal to present desirable criteria,  Designated Inspection Frequency: Every 24 months,  Inspection Date: May 2021
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Structure Number: 15892,  Location: 067410903 (Lat: 40.642883,  Lng: -95.548967),  Route carried "on" structure: County highway ,  Year Built: 1961,  Status: Open,  Structure Length: 3.26m (10.70ft),  Average Daily Traffic: 30 (year 2012),  Average Future Daily Traffic: 30 (year 2041),  Design Load: H 15,  Features Intersected: MILL CREEK,  Facility Carried by Structure: 280 STREET
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 4.480,  Lanes on structure: 2,  Owner: County Highway Agency,  Approaching Roadway Width: 9.4m (30.8ft),  Material/Design: Prestressed concrete,  Design/Construction: Stringer/Multi-beam,  Number Of Spans In Main Unit: 3,  Length of Maximum Span: 13.4m (44.0ft),  Curb-To-Curb Width: 6.2m (20.3ft),  Out-to-Out Width: 6.7m (22.0ft)

Condition: Deck: Satisfactory,  Superstructure: Satisfactory,  Substructure: Fair,  Channel: Serious,  Operating Rating: 37.7 metric tons,  Method Used To Determine Operating Rating: Allowable Stress (AS),  Inventory Rating: 24.3 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: Equal to present desirable criteria,  Approach Roadway Alignment: Equal to present minimum criteria,  Length Of Structure Improvement: 13.00m (42.65ft),  Designated Inspection Frequency: Every 24 months,  Inspection Date: May 2021,  Bridge Improvement Cost: $156,000,  Roadway Improvement Cost: $16,000,  Deck Structure Type: Concrete Cast-file-Place,  Wearing Surface/Protective System: Wearing Surface: Monolithic Concrete
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Structure Number: 15897,  Location: 067411501 (Lat: 40.628611,  Lng: -95.543047),  Route carried "on" structure: County highway ,  Year Built: 1920,  Status: Posted for load,  Structure Length: 4.69m (15.39ft),  Average Daily Traffic: 15 (year 2012),  Average Future Daily Traffic: 15 (year 2041),  Design Load: HS 20,  Features Intersected: MILL CREEK,  Facility Carried by Structure: 290 STREET
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 5.293,  Lanes on structure: 1,  Owner: County Highway Agency,  Approaching Roadway Width: 6.7m (22.0ft),  Material/Design: Steel,  Design/Construction: Truss - Thru,  Number Of Spans In Main Unit: 1,  Number Of Approach Spans: 2,  Length of Maximum Span: 21.3m (69.9ft),  Curb-To-Curb Width: 4.7m (15.4ft),  Out-to-Out Width: 4.8m (15.7ft)

Condition: Deck: Poor,  Superstructure: Fair,  Substructure: Fair,  Channel: Fair,  Operating Rating: 12.5 metric tons,  Method Used To Determine Operating Rating: Load Factor (LF),  Inventory Rating: 7.5 metric tons,  Method Used To Determine Inventory Rating: Load Factor (LF),  Structural Evaluation: High priority of replacement,  Deck Geometry: Better than present minimum criteria,  Waterway Adequacy: Equal to present desirable 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: 15.00m (49.21ft),  Designated Inspection Frequency: Every 24 months,  Critical Feature Inspection Frequency: Every 24 months,  Inspection Date: May 2021,  Critical Feature Inspection Date: May 2021,  Bridge Improvement Cost: $263,000,  Roadway Improvement Cost: $29,000,  Deck Structure Type: Wood or Timber,  Wearing Surface/Protective System: Wearing Surface: Wood or Timber
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Structure Number: 159321,  Location: 068412102 (Lat: 40.694125,  Lng: -95.562456),  Route carried "on" structure: County highway ,  Year Built: 1975,  Status: Open,  Structure Length: 10.73m (35.20ft),  Average Daily Traffic: 180 (year 2016),  Truck Traffic: 18%,  Average Future Daily Traffic: 180 (year 2041),  Design Load: H 20,  Features Intersected: E NISHNABOTNA RIVER,  Facility Carried by Structure: 330 AVENUE
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 12.604,  Lanes on structure: 2,  Owner: County Highway Agency,  Approaching Roadway Width: 9.4m (30.8ft),  Material/Design: Steel continuous,  Design/Construction: Stringer/Multi-beam,  Number Of Spans In Main Unit: 4,  Length of Maximum Span: 29.9m (98.1ft),  Curb-To-Curb Width: 9.1m (29.9ft),  Out-to-Out Width: 9.8m (32.2ft)

Condition: Deck: Satisfactory,  Superstructure: Good,  Substructure: Good,  Channel: Satisfactory,  Operating Rating: 47.8 metric tons,  Method Used To Determine Operating Rating: Allowable Stress (AS),  Inventory Rating: 30.4 metric tons,  Method Used To Determine Inventory Rating: Allowable Stress (AS),  Structural Evaluation: Better than present minimum 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: May 2021,  Deck Structure Type: Concrete Cast-file-Place,  Wearing Surface/Protective System: Wearing Surface: Monolithic Concrete
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Structure Number: 15935,  Location: 068412204 (Lat: 40.689400,  Lng: -95.538928),  Route carried "on" structure: County highway ,  Year Built: 1960,  Status: Open,  Structure Length: 0.73m (2.40ft),  Average Daily Traffic: 20 (year 2012),  Average Future Daily Traffic: 20 (year 2041),  Design Load: HS 20,  Features Intersected: DRAINAGE,  Facility Carried by Structure: 342 AVENUE
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 0.332,  Lanes on structure: 2,  Owner: County Highway Agency,  Approaching Roadway Width: 9.4m (30.8ft),  Material/Design: Steel,  Design/Construction: Stringer/Multi-beam,  Number Of Spans In Main Unit: 1,  Length of Maximum Span: 7.0m (23.0ft),  Curb-To-Curb Width: 6.8m (22.3ft),  Out-to-Out Width: 7.3m (24.0ft)

Condition: Deck: Fair,  Superstructure: Fair,  Substructure: Satisfactory,  Channel: Good,  Operating Rating: 43.4 metric tons,  Method Used To Determine Operating Rating: Load Factor (LF),  Inventory Rating: 26.0 metric tons,  Method Used To Determine Inventory Rating: Load Factor (LF),  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: 2.40m (7.87ft),  Designated Inspection Frequency: Every 24 months,  Inspection Date: May 2021,  Bridge Improvement Cost: $80,000,  Roadway Improvement Cost: $10,000,  Deck Structure Type: Concrete Cast-file-Place,  Wearing Surface/Protective System: Wearing Surface: Gravel
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Structure Number: 15941,  Location: 068413204 (Lat: 40.658433,  Lng: -95.578372),  Route carried "on" structure: County highway ,  Year Built: 1957,  Status: Open,  Structure Length: 3.38m (11.09ft),  Average Daily Traffic: 25 (year 2012),  Average Future Daily Traffic: 25 (year 2041),  Features Intersected: MILL CREEK,  Facility Carried by Structure: 322 AVENUE
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 0.050,  Lanes on structure: 2,  Owner: County Highway Agency,  Approaching Roadway Width: 9.4m (30.8ft),  Material/Design: Steel,  Design/Construction: Stringer/Multi-beam,  Number Of Spans In Main Unit: 3,  Length of Maximum Span: 12.8m (42.0ft),  Curb-To-Curb Width: 6.7m (22.0ft),  Out-to-Out Width: 6.7m (22.0ft)

Condition: Deck: Fair,  Superstructure: Fair,  Substructure: Poor,  Channel: Fair,  Operating Rating: 21.0 metric tons,  Method Used To Determine Operating Rating: Allowable Stress (AS),  Inventory Rating: 15.4 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 minimum criteria,  Length Of Structure Improvement: 14.40m (47.24ft),  Designated Inspection Frequency: Every 24 months,  Inspection Date: May 2021,  Bridge Improvement Cost: $378,000,  Roadway Improvement Cost: $21,000,  Deck Structure Type: Wood or Timber,  Wearing Surface/Protective System: Wearing Surface: Gravel
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Structure Number: 15942,  Location: 068413302 (Lat: 40.662269,  Lng: -95.563969),  Route carried "on" structure: County highway ,  Year Built: 1956,  Status: Open,  Structure Length: 4.57m (14.99ft),  Average Daily Traffic: 90 (year 2016),  Truck Traffic: 11%,  Average Future Daily Traffic: 90 (year 2041),  Design Load: H 15,  Features Intersected: MILL CREEK,  Facility Carried by Structure: 330 AVENUE
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 9.065,  Lanes on structure: 2,  Owner: County Highway Agency,  Approaching Roadway Width: 9.4m (30.8ft),  Material/Design: Steel,  Design/Construction: Stringer/Multi-beam,  Number Of Spans In Main Unit: 3,  Length of Maximum Span: 20.7m (67.9ft),  Curb-To-Curb Width: 6.1m (20.0ft),  Out-to-Out Width: 6.7m (22.0ft)

Condition: Deck: Satisfactory,  Superstructure: Fair,  Substructure: Fair,  Channel: Poor,  Operating Rating: 46.2 metric tons,  Method Used To Determine Operating Rating: Load Factor (LF),  Inventory Rating: 27.7 metric tons,  Method Used To Determine Inventory Rating: Load Factor (LF),  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: 18.00m (59.06ft),  Designated Inspection Frequency: Every 24 months,  Inspection Date: May 2021,  Bridge Improvement Cost: $464,000,  Roadway Improvement Cost: $29,000,  Deck Structure Type: Concrete Cast-file-Place,  Wearing Surface/Protective System: Wearing Surface: Low Slump Concrete
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Structure Number: 16024,  Location: 069413203 (Lat: 40.735944,  Lng: -95.580114),  Route carried "on" structure: County highway ,  Year Built: 1971,  Status: Posted for load,  Structure Length: 0.73m (2.40ft),  Average Daily Traffic: 5 (year 2012),  Average Future Daily Traffic: 5 (year 2041),  Design Load: HS 20,  Features Intersected: MINOR DRAINAGE,  Facility Carried by Structure: 215 STREET
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 6.653,  Lanes on structure: 2,  Owner: County 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: 1,  Length of Maximum Span: 7.0m (23.0ft),  Curb-To-Curb Width: 7.3m (24.0ft),  Out-to-Out Width: 7.3m (24.0ft)

Condition: Deck: Fair,  Superstructure: Fair,  Substructure: Critical,  Channel: Poor,  Operating Rating: 10.9 metric tons,  Method Used To Determine Operating Rating: Allowable Stress (AS),  Inventory Rating: 7.3 metric tons,  Method Used To Determine Inventory Rating: Allowable Stress (AS),  Structural Evaluation: High priority of replacement,  Deck Geometry: Equal to present minimum criteria,  Waterway Adequacy: Meets minimum limits,  Approach Roadway Alignment: Equal to present desirable criteria,  Bridge Posting: Required (Relationship of Operating Rating to Maximum Legal Load: > 39.9% below),  Length Of Structure Improvement: 2.40m (7.87ft),  Designated Inspection Frequency: Every 24 months,  Other Special Inspection Frequency: Every 24 months,  Inspection Date: May 2021,  Other Special Inspection Date: June 2020,  Bridge Improvement Cost: $101,000,  Roadway Improvement Cost: $15,000,  Deck Structure Type: Wood or Timber,  Wearing Surface/Protective System: Wearing Surface: Wood or Timber
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Structure Number: 160271,  Location: 069413303 (Lat: 40.735972,  Lng: -95.566178),  Route carried "on" structure: County highway ,  Year Built: 1984,  Status: Open,  Structure Length: 1.22m (4.00ft),  Average Daily Traffic: 45 (year 2012),  Average Future Daily Traffic: 45 (year 2041),  Design Load: HS 20,  Features Intersected: SPRING BRANCH,  Facility Carried by Structure: 215 STREET
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 7.831,  Lanes on structure: 2,  Owner: County Highway Agency,  Approaching Roadway Width: 6.7m (22.0ft),  Material/Design: Prestressed concrete,  Design/Construction: Tee Beam,  Number Of Spans In Main Unit: 1,  Length of Maximum Span: 11.6m (38.1ft),  Curb-To-Curb Width: 7.5m (24.6ft),  Out-to-Out Width: 7.6m (24.9ft)

Condition: Deck: Satisfactory,  Superstructure: Satisfactory,  Substructure: Satisfactory,  Channel: Satisfactory,  Operating Rating: 49.1 metric tons,  Method Used To Determine Operating Rating: Load Factor (LF),  Inventory Rating: 29.4 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: Equal to present desirable criteria,  Designated Inspection Frequency: Every 24 months,  Inspection Date: May 2021,  Deck Structure Type: Other,  Wearing Surface/Protective System: Wearing Surface: Gravel
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