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


  • National Bridge Inventory (NBI) Statistics
  • 21Number of bridges
  • 249ft / 76.2mTotal length
  • 15,365Total average daily traffic
  • 3,282Total average daily truck traffic
  • 15,365Total future (year 2035) average daily traffic
  • National Bridge Inventory (NBI) Registered Bridges for Elberon
  • No street view available for this location

New bridges in Elberon, IA - historical statistics
  • New bridges - historical statistics
  • 1Before 1900
  • 11920-1929
  • 21950-1959
  • 11960-1969
  • 21970-1979
  • 41980-1989
  • 31990-1999
  • 32000-2009
  • 32010-2019
  • 12020-2022
Reconstructed bridges in Elberon, IA - Historical Statistics
  • Reconstructed bridges - Historical Statistics
  • 11930-1939
  • 01940-1949
  • 01950-1959
  • 01960-1969
  • 01970-1979
  • 01980-1989
  • 01990-1999
  • 02000-2009
  • 12010-2019
Average Bridge Daily Traffic in Elberon, IA
Bridge Condition - Deck
  • Bridge Condition - Deck
  • 15.8%Excellent
  • 26.3%Very good
  • 21.1%Good
  • 5.3%Satisfactory
  • 10.5%Fair
  • 10.5%Poor
  • 5.3%Serious
  • 5.3%Failed
Bridge Condition - Superstructure
  • Bridge Condition - Superstructure
  • 15.8%Excellent
  • 31.6%Very good
  • 5.3%Good
  • 31.6%Satisfactory
  • 5.3%Fair
  • 5.3%Poor
  • 5.3%Failed
Bridge Condition - Substructure
  • Bridge Condition - Substructure
  • 15.8%Excellent
  • 21.1%Very good
  • 21.1%Good
  • 10.5%Satisfactory
  • 10.5%Fair
  • 10.5%Poor
  • 5.3%Serious
  • 5.3%Failed
Bridge Condition - Channel
  • Bridge Condition - Channel
  • 9.5%Excellent
  • 19.0%Very good
  • 33.3%Good
  • 33.3%Satisfactory
  • 4.8%Serious
Bridge Condition - Culverts
  • Bridge Condition - Culverts
  • 50.0%Good
  • 50.0%Serious
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Structure Number: 4431,  Location: 083131108 (Lat: 42.007014,  Lng: -92.322608),  Route carried "on" structure: City street ,  Year Built: 2016,  Status: Open,  Structure Length: 2.77m (9.09ft),  Average Daily Traffic: 310 (year 2021),  Average Future Daily Traffic: 310 (year 2038),  Design Load: HL 93,  Features Intersected: DRAINAGE,  Facility Carried by Structure: E44 1ST ST
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 0.188,  Lanes on structure: 2,  Owner: County Highway Agency,  Approaching Roadway Width: 8.8m (28.9ft),  Skew: 1 degrees,  Material/Design: Concrete continuous,  Design/Construction: Slab,  Number Of Spans In Main Unit: 3,  Length of Maximum Span: 10.7m (35.1ft),  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: Very 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: Equal to present minimum criteria,  Waterway Adequacy: Better than present minimum criteria,  Approach Roadway Alignment: Equal to present desirable criteria,  Designated Inspection Frequency: Every 48 months,  Inspection Date: October 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: 14421,  Location: 0.3 mi. S of Jct. SR E44 (Lat: 42.002647,  Lng: -92.297764),  Route carried "on" structure: State highway 21,  Year Built: 1983,  Status: Open,  Structure Length: 0.73m (2.40ft),  Average Daily Traffic: 1,430 (year 2020),  Truck Traffic: 26%,  Average Future Daily Traffic: 1,430 (year 2040),  Design Load: HS 20,  Features Intersected: BRANCH SALT CREEK
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 102.116,  Lanes on structure: 2,  Base Highway Network: Yes,  Owner: State Highway Agency,  Approaching Roadway Width: 14.6m (47.9ft),  Skew: 3 degrees,  Material/Design: Concrete continuous,  Design/Construction: Culvert,  Number Of Spans In Main Unit: 2,  Length of Maximum Span: 3.0m (9.8ft)

Condition: Channel: Good,  Culverts: Good,  Operating Rating: 44.0 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: Equal to present minimum criteria,  Approach Roadway Alignment: Equal to present desirable criteria,  Designated Inspection Frequency: Every 24 months,  Inspection Date: November 2020
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Structure Number: 14431,  Location: 0.8 mi. S OF Jct. SR E36 (Lat: 42.068225,  Lng: -92.298892),  Route carried "on" structure: State highway 21,  Year Built: 1979,  Status: Open,  Structure Length: 5.76m (18.90ft),  Average Daily Traffic: 1,430 (year 2020),  Truck Traffic: 26%,  Average Future Daily Traffic: 1,430 (year 2039),  Design Load: HS 20,  Features Intersected: BRANCH SALT CREEK
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 109.398,  Lanes on structure: 2,  Base Highway Network: Yes,  Owner: State Highway Agency,  Approaching Roadway Width: 13.4m (44.0ft),  Skew: 4 degrees,  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: 13.4m (44.0ft),  Out-to-Out Width: 14.4m (47.2ft)

Condition: Deck: Good,  Superstructure: Very good,  Substructure: Good,  Channel: Satisfactory,  Operating Rating: 76.3 metric tons,  Method Used To Determine Operating Rating: Load Factor (LF),  Inventory Rating: 45.7 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 desirable criteria,  Approach Roadway Alignment: Equal to present desirable criteria,  Designated Inspection Frequency: Every 24 months,  Inspection Date: April 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: 49541,  Location: 0.8 mi. W of Jct. IA #21 (Lat: 41.964000,  Lng: -92.314083),  Route carried "on" structure: US 8830,  Year Built: 1989,  Status: Open,  Structure Length: 12.47m (40.91ft),  Average Daily Traffic: 4,540 (year 2020),  Truck Traffic: 27%,  Average Future Daily Traffic: 4,540 (year 2040),  Design Load: HS 20,  Features Intersected: SALT CREEK,  Facility Carried by Structure: US 30
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 18.017,  Lanes on structure: 2,  Base Highway Network: Yes,  Owner: State Highway Agency,  Approaching Roadway Width: 14.6m (47.9ft),  Material/Design: Prestressed concrete,  Design/Construction: Stringer/Multi-beam,  Number Of Spans In Main Unit: 5,  Length of Maximum Span: 25.0m (82.0ft),  Curb-To-Curb Width: 13.3m (43.6ft),  Out-to-Out Width: 14.3m (46.9ft)

Condition: Deck: Good,  Superstructure: Very good,  Substructure: Very good,  Channel: Good,  Operating Rating: 86.2 metric tons,  Method Used To Determine Operating Rating: Allowable Stress (AS),  Inventory Rating: 58.0 metric tons,  Method Used To Determine Inventory Rating: Allowable Stress (AS),  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 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: 49721,  Location: 083131301 (Lat: 42.007025,  Lng: -92.309678),  Route carried "on" structure: City street ,  Year Built: 2015,  Status: Open,  Structure Length: 2.80m (9.19ft),  Average Daily Traffic: 520 (year 2021),  Average Future Daily Traffic: 520 (year 2038),  Design Load: HL 93,  Features Intersected: TROUBLESOME CREEK,  Facility Carried by Structure: E44 1ST ST
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 1.081,  Lanes on structure: 2,  Owner: County Highway Agency,  Maintenance Responsibility: City or Municipal Highway Agency,  Approaching Roadway Width: 10.4m (34.1ft),  Material/Design: Concrete continuous,  Design/Construction: Slab,  Number Of Spans In Main Unit: 3,  Length of Maximum Span: 10.7m (35.1ft),  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: 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: Equal to present minimum criteria,  Waterway Adequacy: Superior to present desirable criteria,  Approach Roadway Alignment: Equal to present desirable criteria,  Designated Inspection Frequency: Every 48 months,  Inspection Date: October 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: 71371,  Location: 083120901 (Lat: 42.022258,  Lng: -92.260325),  Route carried "on" structure: County highway ,  Year Built: 2000,  Status: Open,  Structure Length: 0.79m (2.59ft),  Average Daily Traffic: 15 (year 2017),  Average Future Daily Traffic: 15 (year 2039),  Design Load: HS 20,  Features Intersected: SMALL STREAM,  Facility Carried by Structure: 69TH ST
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 3.135,  Lanes on structure: 2,  Owner: County Highway Agency,  Approaching Roadway Width: 7.9m (25.9ft),  Material/Design: Steel,  Design/Construction: Slab,  Number Of Spans In Main Unit: 1,  Length of Maximum Span: 7.0m (23.0ft),  Curb-To-Curb Width: 9.4m (30.8ft),  Out-to-Out Width: 9.5m (31.2ft)

Condition: Deck: Very good,  Superstructure: Good,  Substructure: Good,  Channel: Good,  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: 3.00m (9.84ft),  Designated Inspection Frequency: Every 48 months,  Inspection Date: April 2019,  Bridge Improvement Cost: $15,000,  Roadway Improvement Cost: $2,000,  Deck Structure Type: Concrete Cast-file-Place,  Wearing Surface/Protective System: Wearing Surface: Gravel
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Structure Number: 71511,  Location: 083123001 (Lat: 41.978656,  Lng: -92.286614),  Route carried "on" structure: County highway ,  Year Built: 1997,  Status: Open,  Structure Length: 0.76m (2.49ft),  Average Daily Traffic: 30 (year 2017),  Average Future Daily Traffic: 30 (year 2039),  Features Intersected: BR SALT CREEK,  Facility Carried by Structure: LOCAL
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 0.884,  Lanes on structure: 2,  Owner: County Highway Agency,  Approaching Roadway Width: 7.9m (25.9ft),  Material/Design: Steel,  Design/Construction: Slab,  Number Of Spans In Main Unit: 1,  Length of Maximum Span: 6.4m (21.0ft),  Curb-To-Curb Width: 9.3m (30.5ft),  Out-to-Out Width: 9.4m (30.8ft)

Condition: Deck: Good,  Superstructure: Satisfactory,  Substructure: Satisfactory,  Channel: Satisfactory,  Inventory Rating: 88.6 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: Better than present minimum criteria,  Approach Roadway Alignment: Better than present minimum criteria,  Length Of Structure Improvement: 2.50m (8.20ft),  Designated Inspection Frequency: Every 48 months,  Inspection Date: April 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: 72341,  Location: 084122902 (Lat: 42.063008,  Lng: -92.280200),  Route carried "on" structure: County highway ,  Year Built: 2020,  Status: Open,  Structure Length: 2.47m (8.10ft),  Average Daily Traffic: 15 (year 2017),  Average Future Daily Traffic: 15 (year 2041),  Design Load: HL 93,  Features Intersected: TRIBUTARY TO STEIN CREEK,  Facility Carried by Structure: 11TH AVE
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 17.402,  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: 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: Very 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: Better than present minimum criteria,  Approach Roadway Alignment: Equal to present minimum criteria,  Designated Inspection Frequency: Every 24 months,  Inspection Date: April 2021,  Deck Structure Type: Concrete Cast-file-Place,  Wearing Surface/Protective System: Wearing Surface: Monolithic Concrete
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Structure Number: 72351,  Location: 084123001 (Lat: 42.065378,  Lng: -92.283467),  Route carried "on" structure: County highway ,  Year Built: 1971,  Status: Open,  Structure Length: 0.76m (2.49ft),  Average Daily Traffic: 5 (year 2017),  Average Future Daily Traffic: 5 (year 2041),  Design Load: H 15,  Features Intersected: BR STEIN CK,  Facility Carried by Structure: LOCAL
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 1.271,  Lanes on structure: 2,  Owner: County Highway Agency,  Approaching Roadway Width: 7.9m (25.9ft),  Material/Design: Concrete,  Design/Construction: Channel Beam,  Number Of Spans In Main Unit: 1,  Length of Maximum Span: 7.3m (24.0ft),  Curb-To-Curb Width: 7.0m (23.0ft),  Out-to-Out Width: 7.9m (25.9ft)

Condition: Deck: Satisfactory,  Superstructure: Satisfactory,  Substructure: Poor,  Channel: Satisfactory,  Operating Rating: 40.8 metric tons,  Method Used To Determine Operating Rating: Allowable Stress (AS),  Inventory Rating: 25.8 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 minimum criteria,  Approach Roadway Alignment: Equal to present minimum criteria,  Length Of Structure Improvement: 2.50m (8.20ft),  Designated Inspection Frequency: Every 24 months,  Inspection Date: April 2021,  Bridge Improvement Cost: $15,000,  Roadway Improvement Cost: $2,000,  Deck Structure Type: Concrete Precast Panels,  Wearing Surface/Protective System: Wearing Surface: Gravel
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Structure Number: 31742,  Location: 083130303 (Lat: 42.028981,  Lng: -92.353406),  Route carried "on" structure: County highway ,  Year Built: 1955,  Status: Posted for load,  Structure Length: 1.77m (5.81ft),  Average Daily Traffic: 45 (year 2017),  Average Future Daily Traffic: 45 (year 2041),  Features Intersected: SALT CREEK,  Facility Carried by Structure: LOCAL
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 10.776,  Lanes on structure: 2,  Owner: County Highway Agency,  Approaching Roadway Width: 9.4m (30.8ft),  Material/Design: Wood or Timber,  Design/Construction: Stringer/Multi-beam,  Number Of Spans In Main Unit: 3,  Length of Maximum Span: 5.8m (19.0ft),  Curb-To-Curb Width: 5.5m (18.0ft),  Out-to-Out Width: 5.5m (18.0ft)

Condition: Deck: Poor,  Superstructure: Fair,  Substructure: Serious,  Channel: Satisfactory,  Operating Rating: 4.5 metric tons,  Method Used To Determine Operating Rating: Field evaluation and documented engineering judgment,  Structural Evaluation: High priority of replacement,  Deck Geometry: Meets minimum limits,  Waterway Adequacy: Somewhat better than minimum adequacy,  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: 8.00m (26.25ft),  Designated Inspection Frequency: Every 12 months,  Inspection Date: September 2021,  Bridge Improvement Cost: $211,000,  Roadway Improvement Cost: $21,000,  Deck Structure Type: Wood or Timber,  Wearing Surface/Protective System: Wearing Surface: Bituminous
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Structure Number: 31743,  Location: 083130303 (Lat: 42.028964,  Lng: -92.355411),  Route carried "on" structure: County highway ,  Year Built: 1897,  Year Reconstructed: 1935,  Status: Closed,  Structure Length: 3.75m (12.30ft),  Average Daily Traffic: 45 (year 2017),  Average Future Daily Traffic: 45 (year 2035),  Features Intersected: SALT CREEK,  Facility Carried by Structure: LOCAL
Minimum Vertical Clearance: 4.37m (14.34ft),  Kilometerpoint: 10.610,  Lanes on structure: 1,  Owner: County Highway Agency,  Approaching Roadway Width: 9.4m (30.8ft),  Material/Design: Steel,  Design/Construction: Truss - Thru,  Number Of Spans In Main Unit: 1,  Length of Maximum Span: 36.6m (120.1ft),  Curb-To-Curb Width: 4.7m (15.4ft),  Out-to-Out Width: 4.9m (16.1ft)

Condition: Deck: Failed,  Superstructure: Failed,  Substructure: Failed,  Channel: Satisfactory,  Deck Geometry: Somewhat better than minimum adequacy,  Waterway Adequacy: Somewhat better than minimum adequacy,  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: 15.00m (49.21ft),  Designated Inspection Frequency: Every 24 months,  Inspection Date: January 2015,  Bridge Improvement Cost: $405,000,  Roadway Improvement Cost: $41,000,  Deck Structure Type: Wood or Timber,  Wearing Surface/Protective System: Wearing Surface: Bituminous
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Structure Number: 31747,  Location: 083131106 (Lat: 42.017814,  Lng: -92.322353),  Route carried "on" structure: County highway ,  Year Built: 1950,  Year Reconstructed: 2015,  Status: Posted for load-capacity,  Structure Length: 0.94m (3.08ft),  Average Daily Traffic: 35 (year 2017),  Average Future Daily Traffic: 35 (year 2040),  Features Intersected: TROUBLESOME CREEK,  Facility Carried by Structure: LOCAL
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 15.656,  Lanes on structure: 2,  Owner: County Highway Agency,  Approaching Roadway Width: 7.6m (24.9ft),  Material/Design: Steel,  Design/Construction: Stringer/Multi-beam,  Number Of Spans In Main Unit: 1,  Length of Maximum Span: 9.1m (29.9ft),  Curb-To-Curb Width: 6.1m (20.0ft),  Out-to-Out Width: 6.5m (21.3ft)

Condition: Deck: Fair,  Superstructure: Satisfactory,  Substructure: Satisfactory,  Channel: Satisfactory,  Operating Rating: 37.0 metric tons,  Method Used To Determine Operating Rating: Load Factor (LF),  Inventory Rating: 22.1 metric tons,  Method Used To Determine Inventory Rating: Load Factor (LF),  Structural Evaluation: Equal to present minimum criteria,  Deck Geometry: Somewhat better than minimum adequacy,  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: 0.1 - 9.9% below),  Length Of Structure Improvement: 5.00m (16.40ft),  Designated Inspection Frequency: Every 24 months,  Inspection Date: September 2020,  Bridge Improvement Cost: $171,000,  Roadway Improvement Cost: $17,000,  Deck Structure Type: Concrete Cast-file-Place,  Wearing Surface/Protective System: Wearing Surface: Monolithic Concrete
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Structure Number: 31748,  Location: 083131403 (Lat: 42.006944,  Lng: -92.326597),  Route carried "on" structure: County highway ,  Year Built: 1964,  Status: Open,  Structure Length: 0.73m (2.40ft),  Average Daily Traffic: 230 (year 2021),  Truck Traffic: 26%,  Average Future Daily Traffic: 230 (year 2041),  Features Intersected: TROUBLESOME CREEK,  Facility Carried by Structure: FM
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 5.362,  Lanes on structure: 2,  Owner: County Highway Agency,  Approaching Roadway Width: 10.4m (34.1ft),  Material/Design: Wood or Timber,  Design/Construction: Culvert,  Number Of Spans In Main Unit: 4,  Length of Maximum Span: 1.8m (5.9ft)

Condition: Channel: Serious,  Culverts: Serious,  Operating Rating: 20.0 metric tons,  Method Used To Determine Operating Rating: Allowable Stress (AS),  Inventory Rating: 11.3 metric tons,  Method Used To Determine Inventory Rating: Allowable Stress (AS),  Structural Evaluation: High priority of corrective action,  Waterway Adequacy: High priority of corrective action,  Approach Roadway Alignment: Better than present minimum criteria,  Length Of Structure Improvement: 5.00m (16.40ft),  Designated Inspection Frequency: Every 12 months,  Inspection Date: September 2021,  Bridge Improvement Cost: $114,000,  Roadway Improvement Cost: $12,000
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Structure Number: 317491,  Location: 083131501 (Lat: 42.007225,  Lng: -92.348294),  Route carried "on" structure: County highway ,  Year Built: 1998,  Status: Open,  Structure Length: 8.35m (27.40ft),  Average Daily Traffic: 230 (year 2021),  Truck Traffic: 26%,  Average Future Daily Traffic: 230 (year 2038),  Design Load: HS 20,  Features Intersected: SALT CREEK,  Facility Carried by Structure: FM
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 3.508,  Lanes on structure: 2,  Owner: County Highway Agency,  Approaching Roadway Width: 10.1m (33.1ft),  Material/Design: Concrete continuous,  Design/Construction: Slab,  Number Of Spans In Main Unit: 6,  Length of Maximum Span: 14.9m (48.9ft),  Curb-To-Curb Width: 9.0m (29.5ft),  Out-to-Out Width: 9.3m (30.5ft)

Condition: Deck: Very good,  Superstructure: Very good,  Substructure: Good,  Channel: Very good,  Operating Rating: 77.1 metric tons,  Method Used To Determine Operating Rating: Load Factor (LF),  Inventory Rating: 46.2 metric tons,  Method Used To Determine Inventory Rating: Load Factor (LF),  Structural Evaluation: Better than present minimum criteria,  Waterway Adequacy: Equal to present desirable criteria,  Approach Roadway Alignment: Equal to present desirable criteria,  Length Of Structure Improvement: 27.40m (89.90ft),  Designated Inspection Frequency: Every 48 months,  Inspection Date: October 2018,  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: 31759,  Location: 083132307 (Lat: 41.984469,  Lng: -92.326861),  Route carried "on" structure: County highway ,  Year Built: 1927,  Status: Posted for load,  Structure Length: 6.25m (20.51ft),  Average Daily Traffic: 60 (year 2017),  Average Future Daily Traffic: 60 (year 2040),  Features Intersected: SALT CREEK,  Facility Carried by Structure: LOCAL
Minimum Vertical Clearance: 3.61m (11.84ft),  Kilometerpoint: 3.244,  Lanes on structure: 2,  Owner: County Highway Agency,  Approaching Roadway Width: 7.6m (24.9ft),  Material/Design: Steel,  Design/Construction: Truss - Thru,  Number Of Spans In Main Unit: 1,  Number Of Approach Spans: 2,  Length of Maximum Span: 36.6m (120.1ft),  Curb-To-Curb Width: 5.1m (16.7ft),  Out-to-Out Width: 5.5m (18.0ft)

Condition: Deck: Poor,  Superstructure: Poor,  Substructure: Fair,  Channel: Good,  Operating Rating: 31.1 metric tons,  Method Used To Determine Operating Rating: Allowable Stress (AS),  Inventory Rating: 17.5 metric tons,  Method Used To Determine Inventory Rating: Allowable Stress (AS),  Structural Evaluation: Meets minimum limits,  Deck Geometry: High priority of replacement,  Waterway Adequacy: Better than present minimum criteria,  Approach Roadway Alignment: Somewhat better than minimum adequacy,  Bridge Posting: Required (Relationship of Operating Rating to Maximum Legal Load: 10.0 - 19.9% below),  Length Of Structure Improvement: 23.50m (77.10ft),  Designated Inspection Frequency: Every 24 months,  Critical Feature Inspection Frequency: Every 24 months,  Inspection Date: September 2020,  Critical Feature Inspection Date: August 2021,  Bridge Improvement Cost: $620,000,  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: 317621,  Location: 083132506 (Lat: 41.974436,  Lng: -92.307181),  Route carried "on" structure: County highway ,  Year Built: 1987,  Status: Posted for load-capacity,  Structure Length: 0.98m (3.22ft),  Average Daily Traffic: 30 (year 2017),  Average Future Daily Traffic: 30 (year 2040),  Features Intersected: SMALL STREAM,  Facility Carried by Structure: LOCAL
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 11.991,  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: 9.1m (29.9ft),  Curb-To-Curb Width: 7.2m (23.6ft),  Out-to-Out Width: 7.3m (24.0ft)

Condition: Deck: Fair,  Superstructure: Satisfactory,  Substructure: Poor,  Channel: Good,  Operating Rating: 33.3 metric tons,  Method Used To Determine Operating Rating: Load Factor (LF),  Inventory Rating: 20.0 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: Better than 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: 3.20m (10.50ft),  Designated Inspection Frequency: Every 24 months,  Inspection Date: September 2020,  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: 318661,  Location: 084132404 (Lat: 42.067286,  Lng: -92.318344),  Route carried "on" structure: County highway ,  Year Built: 2002,  Status: Open,  Structure Length: 2.13m (6.99ft),  Average Daily Traffic: 35 (year 2017),  Average Future Daily Traffic: 35 (year 2040),  Design Load: HS 20,  Features Intersected: EAST BRANCH SALT CREEK,  Facility Carried by Structure: LOCAL
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 21.147,  Lanes on structure: 2,  Owner: County Highway Agency,  Approaching Roadway Width: 7.9m (25.9ft),  Material/Design: Steel,  Design/Construction: Slab,  Number Of Spans In Main Unit: 1,  Length of Maximum Span: 20.7m (67.9ft),  Curb-To-Curb Width: 9.1m (29.9ft),  Out-to-Out Width: 9.1m (29.9ft)

Condition: Deck: Very good,  Superstructure: Very good,  Substructure: Very good,  Channel: Good,  Operating Rating: 50.8 metric tons,  Method Used To Determine Operating Rating: Load Factor (LF),  Inventory Rating: 30.5 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: Better than present minimum criteria,  Approach Roadway Alignment: Better than present minimum criteria,  Length Of Structure Improvement: 7.00m (22.97ft),  Designated Inspection Frequency: Every 24 months,  Inspection Date: September 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
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Structure Number: 318681,  Location: 084132703 (Lat: 42.057667,  Lng: -92.339942),  Route carried "on" structure: County highway ,  Year Built: 1987,  Status: Open,  Structure Length: 2.50m (8.20ft),  Average Daily Traffic: 25 (year 2017),  Average Future Daily Traffic: 25 (year 2040),  Features Intersected: EAST BRANCH SALT CREEK,  Facility Carried by Structure: LOCAL
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 3.030,  Lanes on structure: 2,  Owner: County Highway Agency,  Approaching Roadway Width: 7.3m (24.0ft),  Material/Design: Steel,  Design/Construction: Stringer/Multi-beam,  Number Of Spans In Main Unit: 2,  Length of Maximum Span: 12.2m (40.0ft),  Curb-To-Curb Width: 7.2m (23.6ft),  Out-to-Out Width: 7.3m (24.0ft)

Condition: Deck: Serious,  Superstructure: Satisfactory,  Substructure: Fair,  Channel: Satisfactory,  Operating Rating: 37.5 metric tons,  Method Used To Determine Operating Rating: Allowable Stress (AS),  Inventory Rating: 26.1 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 minimum criteria,  Approach Roadway Alignment: Better than present minimum criteria,  Length Of Structure Improvement: 8.20m (26.90ft),  Designated Inspection Frequency: Every 24 months,  Inspection Date: September 2020,  Bridge Improvement Cost: $15,000,  Roadway Improvement Cost: $2,000,  Deck Structure Type: Wood or Timber,  Wearing Surface/Protective System: Wearing Surface: Bituminous
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Structure Number: 318741,  Location: 084133402 (Lat: 42.040094,  Lng: -92.356839),  Route carried "on" structure: County highway ,  Year Built: 2003,  Status: Open,  Structure Length: 4.69m (15.39ft),  Average Daily Traffic: 15 (year 2021),  Average Future Daily Traffic: 15 (year 2038),  Design Load: HS 20,  Features Intersected: SALT CREEK,  Facility Carried by Structure: FM
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 15.459,  Lanes on structure: 2,  Owner: County Highway Agency,  Approaching Roadway Width: 7.9m (25.9ft),  Skew: 4 degrees,  Material/Design: Concrete continuous,  Design/Construction: Slab,  Number Of Spans In Main Unit: 3,  Length of Maximum Span: 17.7m (58.1ft),  Curb-To-Curb Width: 9.1m (29.9ft),  Out-to-Out Width: 10.0m (32.8ft)

Condition: Deck: Very good,  Superstructure: Very good,  Substructure: Very good,  Channel: Very good,  Operating Rating: 70.6 metric tons,  Method Used To Determine Operating Rating: Load Factor (LF),  Inventory Rating: 42.3 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,  Length Of Structure Improvement: 15.00m (49.21ft),  Designated Inspection Frequency: Every 48 months,  Inspection Date: September 2018,  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: 36397,  Location: 083120402 (Lat: 42.023003,  Lng: -92.260858),  Route carried "on" structure: County highway ,  Year Built: 1997,  Status: Open,  Structure Length: 0.76m (2.49ft),  Average Daily Traffic: 20 (year 2017),  Average Future Daily Traffic: 20 (year 2039),  Features Intersected: BR PRAIRIE CREEK,  Facility Carried by Structure: LOCAL
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 8.148,  Lanes on structure: 2,  Owner: County Highway Agency,  Approaching Roadway Width: 7.3m (24.0ft),  Material/Design: Steel,  Design/Construction: Slab,  Number Of Spans In Main Unit: 1,  Length of Maximum Span: 6.4m (21.0ft),  Curb-To-Curb Width: 9.3m (30.5ft),  Out-to-Out Width: 9.4m (30.8ft)

Condition: Deck: Good,  Superstructure: Satisfactory,  Substructure: Good,  Channel: Good,  Inventory Rating: 88.6 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: 2.50m (8.20ft),  Designated Inspection Frequency: Every 48 months,  Inspection Date: April 2019,  Bridge Improvement Cost: $15,000,  Roadway Improvement Cost: $2,000,  Deck Structure Type: Concrete Cast-file-Place,  Wearing Surface/Protective System: Wearing Surface: Gravel
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Structure Number: 70086,  Location: 0.9 Mi. W of IA 21 (Lat: 41.964247,  Lng: -92.312489),  Route carried "on" structure: US 30,  Year Built: 2019,  Status: Open,  Structure Length: 14.05m (46.10ft),  Average Daily Traffic: 6,300 (year 2020),  Truck Traffic: 19%,  Average Future Daily Traffic: 6,300 (year 2041),  Design Load: HL 93,  Features Intersected: SALT CREEK
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 348.162,  Lanes on structure: 2,  Base Highway Network: Yes,  Owner: State Highway Agency,  Approaching Roadway Width: 14.6m (47.9ft),  Material/Design: Prestressed concrete,  Design/Construction: Stringer/Multi-beam,  Number Of Spans In Main Unit: 5,  Length of Maximum Span: 31.1m (102.0ft),  Curb-To-Curb Width: 12.2m (40.0ft),  Out-to-Out Width: 13.2m (43.3ft)

Condition: Deck: Excellent,  Superstructure: Excellent,  Substructure: Excellent,  Channel: Excellent,  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: Somewhat better than minimum adequacy,  Waterway Adequacy: Superior to present desirable criteria,  Approach Roadway Alignment: Equal to present desirable criteria,  Designated Inspection Frequency: Every 23 months,  Inspection Date: December 2021,  Deck Structure Type: Concrete Cast-file-Place,  Wearing Surface/Protective System: Wearing Surface: Monolithic Concrete,  Deck Protection: Epoxy Coated Reinforcing
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