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


  • National Bridge Inventory (NBI) Statistics
  • 11Number of bridges
  • 135ft / 40.6mTotal length
  • 3,440Total average daily traffic
  • 491Total average daily truck traffic
  • 3,440Total future (year 2038) average daily traffic
  • National Bridge Inventory (NBI) Registered Bridges for Benton
  • No street view available for this location

New bridges in Benton, IA - historical statistics
  • New bridges - historical statistics
  • 21930-1939
  • 11940-1949
  • 21950-1959
  • 11970-1979
  • 21980-1989
  • 21990-1999
  • 12000-2009
Bridge Condition - Deck
  • Bridge Condition - Deck
  • 9.1%Very good
  • 36.4%Good
  • 18.2%Satisfactory
  • 18.2%Fair
  • 9.1%Poor
  • 9.1%Serious
Bridge Condition - Superstructure
  • Bridge Condition - Superstructure
  • 36.4%Very good
  • 18.2%Good
  • 27.3%Satisfactory
  • 9.1%Fair
  • 9.1%Serious
Bridge Condition - Substructure
  • Bridge Condition - Substructure
  • 18.2%Very good
  • 36.4%Good
  • 18.2%Satisfactory
  • 27.3%Fair
Bridge Condition - Channel
  • Bridge Condition - Channel
  • 20.0%Good
  • 70.0%Satisfactory
  • 10.0%Fair
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Structure Number: 46341,  Location: 1.7 MI. W OF Jct. SR P33 (Lat: 40.711556,  Lng: -94.361533),  Route carried "on" structure: State highway 2,  Year Built: 1988,  Status: Open,  Structure Length: 2.83m (9.28ft),  Average Daily Traffic: 1,050 (year 2020),  Truck Traffic: 16%,  Average Future Daily Traffic: 1,050 (year 2040),  Design Load: HS 20,  Features Intersected: DRAINAGE DITCH
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 140.835,  Lanes on structure: 2,  Base Highway Network: Yes,  Owner: State Highway Agency,  Approaching Roadway Width: 12.2m (40.0ft),  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-To-Curb Width: 12.2m (40.0ft),  Out-to-Out Width: 13.2m (43.3ft)

Condition: Deck: Good,  Superstructure: Very good,  Substructure: Very good,  Channel: Satisfactory,  Operating Rating: 90.5 metric tons,  Method Used To Determine Operating Rating: Allowable Stress (AS),  Inventory Rating: 36.6 metric tons,  Method Used To Determine Inventory Rating: Allowable Stress (AS),  Structural Evaluation: Equal to present desirable criteria,  Deck Geometry: Better than present minimum criteria,  Waterway Adequacy: Equal to present minimum criteria,  Approach Roadway Alignment: Equal to present desirable criteria,  Designated Inspection Frequency: Every 24 months,  Inspection Date: September 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: 46371,  Location: 0.8 MI. W OF Jct. SR P33 (Lat: 40.711492,  Lng: -94.344600),  Route carried "on" structure: State highway 2,  Year Built: 1976,  Status: Open,  Structure Length: 6.89m (22.60ft),  Average Daily Traffic: 1,070 (year 2020),  Truck Traffic: 17%,  Average Future Daily Traffic: 1,070 (year 2040),  Design Load: HS 20,  Features Intersected: W FORK OF GRAND RIVER
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 142.266,  Lanes on structure: 2,  Base Highway Network: Yes,  Owner: State Highway Agency,  Approaching Roadway Width: 13.4m (44.0ft),  Skew: 1 degrees,  Material/Design: Prestressed concrete,  Design/Construction: Stringer/Multi-beam,  Number Of Spans In Main Unit: 3,  Length of Maximum Span: 29.6m (97.1ft),  Curb-To-Curb Width: 13.4m (44.0ft),  Out-to-Out Width: 14.4m (47.2ft)

Condition: Deck: Good,  Superstructure: Very good,  Substructure: Good,  Channel: Satisfactory,  Operating Rating: 84.0 metric tons,  Method Used To Determine Operating Rating: Load Factor (LF),  Inventory Rating: 30.4 metric tons,  Method Used To Determine Inventory Rating: Load Factor (LF),  Structural Evaluation: Better than present minimum criteria,  Deck Geometry: Equal to present desirable criteria,  Waterway Adequacy: Equal to present minimum criteria,  Approach Roadway Alignment: Equal to present desirable criteria,  Designated Inspection Frequency: Every 24 months,  Inspection Date: September 2020,  Deck Structure Type: Concrete Cast-file-Place,  Wearing Surface/Protective System: Wearing Surface: Low Slump Concrete
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Structure Number: 46511,  Location: 069303206 (Lat: 40.729908,  Lng: -94.328581),  Route carried "on" structure: County highway ,  Year Built: 1985,  Status: Open,  Structure Length: 5.33m (17.49ft),  Average Daily Traffic: 740 (year 2016),  Truck Traffic: 10%,  Average Future Daily Traffic: 740 (year 2040),  Design Load: HS 20,  Features Intersected: CROOKED CREEK,  Facility Carried by Structure: HWY 66
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 2.033,  Lanes on structure: 2,  Owner: County Highway Agency,  Approaching Roadway Width: 6.7m (22.0ft),  Material/Design: Prestressed concrete,  Design/Construction: Stringer/Multi-beam,  Number Of Spans In Main Unit: 3,  Length of Maximum Span: 21.0m (68.9ft),  Curb-To-Curb Width: 11.0m (36.1ft),  Out-to-Out Width: 12.0m (39.4ft)

Condition: Deck: Satisfactory,  Superstructure: Very good,  Substructure: Good,  Channel: Satisfactory,  Operating Rating: 42.4 metric tons,  Method Used To Determine Operating Rating: Load Factor (LF),  Inventory Rating: 25.4 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,  Length Of Structure Improvement: 17.50m (57.41ft),  Designated Inspection Frequency: Every 24 months,  Inspection Date: December 2020,  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,  Deck Protection: Epoxy Coated Reinforcing
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Structure Number: 29647,  Location: 068310103 (Lat: 40.725978,  Lng: -94.364000),  Route carried "on" structure: County highway ,  Year Built: 1930,  Status: Posted for load-capacity,  Structure Length: 1.22m (4.00ft),  Average Daily Traffic: 30 (year 2016),  Average Future Daily Traffic: 30 (year 2041),  Design Load: HS 20+Mod,  Features Intersected: STREAM,  Facility Carried by Structure: LOCAL
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 9.096,  Lanes on structure: 2,  Owner: County Highway Agency,  Approaching Roadway Width: 8.5m (27.9ft),  Material/Design: Wood or Timber,  Design/Construction: Stringer/Multi-beam,  Number Of Spans In Main Unit: 2,  Length of Maximum Span: 5.8m (19.0ft),  Curb-To-Curb Width: 4.9m (16.1ft),  Out-to-Out Width: 4.9m (16.1ft)

Condition: Deck: Satisfactory,  Superstructure: Satisfactory,  Substructure: Fair,  Channel: Fair,  Operating Rating: 54.7 metric tons,  Method Used To Determine Operating Rating: Allowable Stress (AS),  Inventory Rating: 44.6 metric tons,  Method Used To Determine Inventory Rating: Allowable Stress (AS),  Structural Evaluation: Somewhat better than minimum adequacy,  Deck Geometry: High priority of corrective action,  Waterway Adequacy: Better than present minimum criteria,  Approach Roadway Alignment: Better than present minimum criteria,  Length Of Structure Improvement: 7.50m (24.61ft),  Designated Inspection Frequency: Every 24 months,  Inspection Date: December 2021,  Bridge Improvement Cost: $156,000,  Roadway Improvement Cost: $16,000,  Deck Structure Type: Wood or Timber,  Wearing Surface/Protective System: Wearing Surface: Gravel
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Structure Number: 296501,  Location: 068311304 (Lat: 40.696528,  Lng: -94.366836),  Route carried "on" structure: County highway ,  Year Built: 1996,  Status: Open,  Structure Length: 1.31m (4.30ft),  Average Daily Traffic: 10 (year 2016),  Average Future Daily Traffic: 10 (year 2040),  Design Load: H 20,  Features Intersected: STREAM,  Facility Carried by Structure: LOCAL
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 3.758,  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: 12.2m (40.0ft),  Curb-To-Curb Width: 7.3m (24.0ft),  Out-to-Out Width: 7.5m (24.6ft)

Condition: Deck: Good,  Superstructure: Satisfactory,  Substructure: Good,  Channel: Satisfactory,  Operating Rating: 40.5 metric tons,  Method Used To Determine Operating Rating: Allowable Stress (AS),  Inventory Rating: 25.1 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: Equal to present desirable criteria,  Approach Roadway Alignment: Equal to present minimum criteria,  Length Of Structure Improvement: 4.30m (14.11ft),  Designated Inspection Frequency: Every 24 months,  Inspection Date: December 2020,  Bridge Improvement Cost: $15,000,  Roadway Improvement Cost: $2,000,  Deck Structure Type: Concrete Cast-file-Place
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Structure Number: 296511,  Location: 068311303 (Lat: 40.697094,  Lng: -94.360489),  Route carried "on" structure: County highway ,  Year Built: 1996,  Status: Open,  Structure Length: 2.32m (7.61ft),  Average Daily Traffic: 10 (year 2016),  Average Future Daily Traffic: 10 (year 2040),  Design Load: H 20,  Features Intersected: STREAM,  Facility Carried by Structure: LOCAL
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 7.743,  Lanes on structure: 2,  Owner: County Highway Agency,  Approaching Roadway Width: 9.1m (29.9ft),  Material/Design: Steel,  Design/Construction: Stringer/Multi-beam,  Number Of Spans In Main Unit: 1,  Length of Maximum Span: 21.3m (69.9ft),  Curb-To-Curb Width: 7.4m (24.3ft),  Out-to-Out Width: 7.6m (24.9ft)

Condition: Deck: Good,  Superstructure: Good,  Substructure: Good,  Channel: Good,  Operating Rating: 37.5 metric tons,  Method Used To Determine Operating Rating: Load Factor (LF),  Inventory Rating: 22.4 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: Equal to present desirable criteria,  Approach Roadway Alignment: Equal to present desirable criteria,  Length Of Structure Improvement: 7.60m (24.93ft),  Designated Inspection Frequency: Every 24 months,  Inspection Date: December 2020,  Bridge Improvement Cost: $15,000,  Roadway Improvement Cost: $2,000,  Deck Structure Type: Concrete Cast-file-Place
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Structure Number: 29652,  Location: 068311404 (Lat: 40.694056,  Lng: -94.385742),  Route carried "on" structure: County highway ,  Year Built: 1940,  Status: Posted for load,  Structure Length: 4.39m (14.40ft),  Average Daily Traffic: 380 (year 2016),  Truck Traffic: 18%,  Average Future Daily Traffic: 380 (year 2040),  Design Load: H 15,  Features Intersected: UP RR,  Facility Carried by Structure: FM
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 8.885,  Lanes on structure: 2,  Owner: County Highway Agency,  Approaching Roadway Width: 10.4m (34.1ft),  Skew: 2 degrees,  Material/Design: Steel continuous,  Design/Construction: Stringer/Multi-beam,  Number Of Spans In Main Unit: 3,  Length of Maximum Span: 17.1m (56.1ft),  Curb-To-Curb Width: 7.3m (24.0ft),  Out-to-Out Width: 8.5m (27.9ft)

Condition: Deck: Serious,  Superstructure: Serious,  Substructure: Fair,  Operating Rating: 28.6 metric tons,  Method Used To Determine Operating Rating: Load Factor (LF),  Inventory Rating: 17.1 metric tons,  Method Used To Determine Inventory Rating: Load Factor (LF),  Structural Evaluation: High priority of corrective action,  Deck Geometry: Somewhat better than minimum adequacy,  Underclear: High priority of replacement,  Approach Roadway Alignment: Equal to present minimum criteria,  Bridge Posting: Required (Relationship of Operating Rating to Maximum Legal Load: 0.1 - 9.9% below),  Length Of Structure Improvement: 16.10m (52.82ft),  Designated Inspection Frequency: Every 24 months,  Critical Feature Inspection Frequency: Every 24 months,  Inspection Date: December 2020,  Critical Feature Inspection Date: June 2021,  Bridge Improvement Cost: $417,000,  Roadway Improvement Cost: $41,000,  Deck Structure Type: Concrete Cast-file-Place,  Wearing Surface/Protective System: Wearing Surface: Monolithic Concrete
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Structure Number: 29731,  Location: 069301902 (Lat: 40.756461,  Lng: -94.357697),  Route carried "on" structure: County highway ,  Year Built: 1936,  Year Reconstructed: 1984,  Status: Posted for load,  Structure Length: 2.80m (9.19ft),  Average Daily Traffic: 40 (year 2016),  Average Future Daily Traffic: 40 (year 2040),  Features Intersected: WOLF CREEK,  Facility Carried by Structure: LOCAL
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 13.292,  Lanes on structure: 2,  Owner: County Highway Agency,  Approaching Roadway Width: 7.3m (24.0ft),  Skew: 1 degrees,  Material/Design: Steel,  Design/Construction: Stringer/Multi-beam,  Number Of Spans In Main Unit: 3,  Length of Maximum Span: 12.2m (40.0ft),  Curb-To-Curb Width: 7.3m (24.0ft),  Out-to-Out Width: 7.3m (24.0ft)

Condition: Deck: Fair,  Superstructure: Fair,  Substructure: Fair,  Channel: Satisfactory,  Operating Rating: 24.9 metric tons,  Method Used To Determine Operating Rating: Allowable Stress (AS),  Inventory Rating: 16.3 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: Equal to present minimum criteria,  Approach Roadway Alignment: Better than present minimum criteria,  Bridge Posting: Required (Relationship of Operating Rating to Maximum Legal Load: 10.0 - 19.9% below),  Length Of Structure Improvement: 12.50m (41.01ft),  Designated Inspection Frequency: Every 24 months,  Inspection Date: December 2020,  Bridge Improvement Cost: $260,000,  Roadway Improvement Cost: $26,000,  Deck Structure Type: Wood or Timber,  Wearing Surface/Protective System: Wearing Surface: Gravel
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Structure Number: 2974,  Location: 069303205 (Lat: 40.733033,  Lng: -94.324161),  Route carried "on" structure: County highway ,  Year Built: 1957,  Status: Open,  Structure Length: 4.02m (13.19ft),  Average Daily Traffic: 50 (year 2016),  Average Future Daily Traffic: 50 (year 2040),  Features Intersected: CROOKED CREEK,  Facility Carried by Structure: LOCAL
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 0.369,  Lanes on structure: 2,  Owner: County Highway Agency,  Approaching Roadway Width: 8.5m (27.9ft),  Skew: 3 degrees,  Material/Design: Steel,  Design/Construction: Stringer/Multi-beam,  Number Of Spans In Main Unit: 3,  Length of Maximum Span: 13.1m (43.0ft),  Curb-To-Curb Width: 6.2m (20.3ft),  Out-to-Out Width: 6.2m (20.3ft)

Condition: Deck: Fair,  Superstructure: Good,  Substructure: Satisfactory,  Channel: Satisfactory,  Operating Rating: 26.2 metric tons,  Method Used To Determine Operating Rating: Load Factor (LF),  Inventory Rating: 15.7 metric tons,  Method Used To Determine Inventory Rating: Load Factor (LF),  Structural Evaluation: Meets minimum limits,  Deck Geometry: Somewhat better than minimum adequacy,  Waterway Adequacy: Equal to present desirable criteria,  Approach Roadway Alignment: Better than present minimum criteria,  Length Of Structure Improvement: 20.10m (65.94ft),  Designated Inspection Frequency: Every 24 months,  Inspection Date: December 2020,  Bridge Improvement Cost: $418,000,  Roadway Improvement Cost: $42,000,  Deck Structure Type: Concrete Cast-file-Place,  Wearing Surface/Protective System: Wearing Surface: Monolithic Concrete
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Structure Number: 297621,  Location: 069313401 (Lat: 40.740381,  Lng: -94.413228),  Route carried "on" structure: County highway ,  Year Built: 2009,  Status: Open,  Structure Length: 4.05m (13.29ft),  Average Daily Traffic: 30 (year 2016),  Average Future Daily Traffic: 30 (year 2038),  Design Load: HL 93,  Features Intersected: TURKEY CREEK,  Facility Carried by Structure: LOCAL
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 4.920,  Lanes on structure: 2,  Owner: County Highway Agency,  Approaching Roadway Width: 8.5m (27.9ft),  Material/Design: Concrete continuous,  Design/Construction: Slab,  Number Of Spans In Main Unit: 3,  Length of Maximum Span: 15.5m (50.9ft),  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: 72.3 metric tons,  Method Used To Determine Operating Rating: Load Factor (LF),  Inventory Rating: 43.3 metric tons,  Method Used To Determine Inventory Rating: Load Factor (LF),  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: December 2018,  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: 29763,  Location: 069313401 (Lat: 40.740369,  Lng: -94.410306),  Route carried "on" structure: County highway ,  Year Built: 1955,  Status: Posted for load-capacity,  Structure Length: 5.46m (17.91ft),  Average Daily Traffic: 30 (year 2016),  Average Future Daily Traffic: 30 (year 2040),  Design Load: H 15,  Features Intersected: PLATTE RIVER,  Facility Carried by Structure: LOCAL
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 5.166,  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: 3,  Length of Maximum Span: 20.7m (67.9ft),  Curb-To-Curb Width: 6.2m (20.3ft),  Out-to-Out Width: 6.6m (21.7ft)

Condition: Deck: Poor,  Superstructure: Satisfactory,  Substructure: Satisfactory,  Channel: Satisfactory,  Operating Rating: 28.9 metric tons,  Method Used To Determine Operating Rating: Load Factor (LF),  Inventory Rating: 17.3 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: Better than present minimum criteria,  Bridge Posting: Required (Relationship of Operating Rating to Maximum Legal Load: 0.1 - 9.9% below),  Length Of Structure Improvement: 22.60m (74.15ft),  Designated Inspection Frequency: Every 24 months,  Inspection Date: November 2020,  Bridge Improvement Cost: $470,000,  Roadway Improvement Cost: $47,000,  Deck Structure Type: Concrete Cast-file-Place,  Wearing Surface/Protective System: Wearing Surface: Monolithic Concrete
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