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

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Structure Number: 6721,  Location: 000000000 (Lat: 41.672775,  Lng: -93.726036),  Route carried "on" structure: City street ,  Year Built: 1979,  Status: Open,  Structure Length: 6.61m (21.69ft),  Average Daily Traffic: 2,210 (year 2016),  Average Future Daily Traffic: 2,210 (year 2040),  Design Load: H 20,  Features Intersected: BEAVER CREEK,  Facility Carried by Structure: NW 62ND AVE EB
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 3.306,  Lanes on structure: 2,  Owner: City or Municipal Highway Agency,  Approaching Roadway Width: 11.0m (36.1ft),  Skew: 3 degrees,  Material/Design: Prestressed concrete continuous,  Design/Construction: Stringer/Multi-beam,  Number Of Spans In Main Unit: 3,  Length of Maximum Span: 22.6m (74.1ft),  Curb-To-Curb Width: 9.1m (29.9ft),  Out-to-Out Width: 10.1m (33.1ft)

Condition: Deck: Good,  Superstructure: Very good,  Substructure: Very good,  Channel: Good,  Operating Rating: 37.9 metric tons,  Method Used To Determine Operating Rating: Load Factor (LF),  Inventory Rating: 22.5 metric tons,  Method Used To Determine Inventory Rating: Load Factor (LF),  Structural Evaluation: Equal to present minimum criteria,  Deck Geometry: Meets minimum limits,  Waterway Adequacy: Equal to present desirable criteria,  Approach Roadway Alignment: Equal to present desirable criteria,  Designated Inspection Frequency: Every 24 months,  Inspection Date: September 2020,  Deck Structure Type: Concrete Cast-file-Place,  Wearing Surface/Protective System: Wearing Surface: Low Slump Concrete

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Structure Number: 4103,  Location: 000000000 (Lat: 41.652931,  Lng: -93.697519),  Route carried "on" structure: City street ,  Year Built: 1957,  Year Reconstructed: 1999,  Status: Open,  Structure Length: 6.46m (21.19ft),  Average Daily Traffic: 15,600 (year 2018),  Average Future Daily Traffic: 15,600 (year 2040),  Design Load: H 20,  Features Intersected: BEAVER CREEK,  Facility Carried by Structure: MERLE HAY RD
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 0.000,  Lanes on structure: 4,  Owner: City or Municipal Highway Agency,  Approaching Roadway Width: 41.8m (137.1ft),  Material/Design: Steel continuous,  Design/Construction: Stringer/Multi-beam,  Number Of Spans In Main Unit: 3,  Length of Maximum Span: 25.0m (82.0ft),  Curb-To-Curb Width: 30.2m (99.1ft),  Out-to-Out Width: 30.5m (100.1ft)

Condition: Deck: Good,  Superstructure: Satisfactory,  Substructure: Good,  Channel: Fair,  Operating Rating: 41.8 metric tons,  Method Used To Determine Operating Rating: Load and Resistance Factor Rating (LRFR) rating reported by rating factor(RF) method using HL-93 loadings,  Inventory Rating: 32.4 metric tons,  Method Used To Determine Inventory Rating: Load and Resistance Factor Rating (LRFR) rating reported by rating factor(RF) method using HL-93 loadings,  Structural Evaluation: Equal to present minimum criteria,  Deck Geometry: Superior 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,  Deck Protection: Epoxy Coated Reinforcing

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Structure Number: 415,  Location: 1.6 MI. E OF JCT. IA 28 (Lat: 41.650694,  Lng: -93.667850),  Route carried "on" structure: Interstate 80,  Year Built: 1958,  Year Reconstructed: 1991,  Status: Open,  Structure Length: 21.70m (71.19ft),  Average Daily Traffic: 42,800 (year 2020),  Truck Traffic: 19%,  Average Future Daily Traffic: 42,800 (year 2041),  Design Load: HS 20,  Features Intersected: DES MOINES RIVER & BIKE
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 213.573,  Lanes on structure: 3,  Base Highway Network: Yes,  Owner: State Highway Agency,  Approaching Roadway Width: 20.7m (67.9ft),  Material/Design: Prestressed concrete,  Design/Construction: Stringer/Multi-beam,  Number Of Spans In Main Unit: 7,  Length of Maximum Span: 31.1m (102.0ft),  Curb-To-Curb Width: 19.0m (62.3ft),  Out-to-Out Width: 19.9m (65.3ft)

Condition: Deck: Satisfactory,  Superstructure: Fair,  Substructure: Satisfactory,  Channel: Good,  Operating Rating: 44.0 metric tons,  Method Used To Determine Operating Rating: Load Factor (LF),  Inventory Rating: 32.3 metric tons,  Method Used To Determine Inventory Rating: Load Factor (LF),  Structural Evaluation: Somewhat better than minimum adequacy,  Deck Geometry: Superior 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: March 2021,  Deck Structure Type: Concrete Cast-file-Place,  Wearing Surface/Protective System: Wearing Surface: Low Slump Concrete

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Structure Number: 4151,  Location: 1.6 MI. E OF JCT. IA 28 (Lat: 41.650764,  Lng: -93.665256),  Route carried "on" structure: Interstate 80,  Year Built: 1958,  Year Reconstructed: 2019,  Status: Open,  Structure Length: 21.70m (71.19ft),  Average Daily Traffic: 42,800 (year 2020),  Truck Traffic: 19%,  Average Future Daily Traffic: 42,800 (year 2041),  Design Load: HS 20,  Features Intersected: DES MOINES RIVER & BIKE
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 279.350,  Lanes on structure: 3,  Owner: State Highway Agency,  Approaching Roadway Width: 19.8m (65.0ft),  Material/Design: Prestressed concrete,  Design/Construction: Stringer/Multi-beam,  Number Of Spans In Main Unit: 7,  Length of Maximum Span: 31.1m (102.0ft),  Curb-To-Curb Width: 26.3m (86.3ft),  Out-to-Out Width: 27.3m (89.6ft)

Condition: Deck: Good,  Superstructure: Very good,  Substructure: Good,  Channel: Satisfactory,  Operating Rating: 78.5 metric tons,  Method Used To Determine Operating Rating: Load Factor (LF),  Inventory Rating: 35.7 metric tons,  Method Used To Determine Inventory Rating: Load Factor (LF),  Structural Evaluation: Better than present minimum criteria,  Deck Geometry: Superior 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: March 2021,  Deck Structure Type: Concrete Cast-file-Place,  Wearing Surface/Protective System: Wearing Surface: Low Slump Concrete

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Structure Number: 281371,  Location: NW 66th over Des Moines (Lat: 41.680478,  Lng: -93.670742),  Route carried "on" structure: County highway ,  Year Built: 2016,  Status: Open,  Structure Length: 25.42m (83.40ft),  Average Daily Traffic: 11,400 (year 2016),  Average Future Daily Traffic: 11,400 (year 2042),  Design Load: HL 93,  Features Intersected: DES MOINES RIVER,  Facility Carried by Structure: FM
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 0.435,  Lanes on structure: 4,  Owner: County Highway Agency,  Approaching Roadway Width: 24.1m (79.1ft),  Skew: 1 degrees,  Material/Design: Prestressed concrete,  Design/Construction: Stringer/Multi-beam,  Number Of Spans In Main Unit: 8,  Length of Maximum Span: 32.6m (107.0ft),  Curb or Sidewalk Widths: Left: 0.0m,  Right: 3.0m (9.8ft),  Curb-To-Curb Width: 17.1m (56.1ft),  Out-to-Out Width: 21.3m (69.9ft)

Condition: Deck: Good,  Superstructure: Very good,  Substructure: Very good,  Channel: Very good,  Operating Rating: 57.3 metric tons,  Method Used To Determine Operating Rating: Load and Resistance Factor Rating (LRFR) rating reported by rating factor(RF) method using HL-93 loadings,  Inventory Rating: 44.4 metric tons,  Method Used To Determine Inventory Rating: Load and Resistance Factor Rating (LRFR) rating reported by rating factor(RF) method using HL-93 loadings,  Structural Evaluation: Equal to present desirable criteria,  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 24 months,  Inspection Date: Febuary 2022,  Deck Structure Type: Concrete Cast-file-Place

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Structure Number: 281456,  Location: 000000000 (Lat: 41.688397,  Lng: -93.735883),  Route carried "on" structure: County highway ,  Year Built: 1994,  Year Reconstructed: 2008,  Status: Open,  Structure Length: 7.04m (23.10ft),  Average Daily Traffic: 5,300 (year 2021),  Average Future Daily Traffic: 5,300 (year 2040),  Design Load: HS 20,  Features Intersected: BEAVER CREEK,  Facility Carried by Structure: NW 70TH AVENUE
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 0.295,  Lanes on structure: 4,  Owner: City or Municipal Highway Agency,  Approaching Roadway Width: 21.6m (70.9ft),  Material/Design: Prestressed concrete continuous,  Design/Construction: Stringer/Multi-beam,  Number Of Spans In Main Unit: 3,  Length of Maximum Span: 29.3m (96.1ft),  Curb or Sidewalk Widths: Left: 0.0m,  Right: 4.3m (14.1ft),  Curb-To-Curb Width: 21.6m (70.9ft),  Out-to-Out Width: 27.1m (88.9ft)

Condition: Deck: Very good,  Superstructure: Good,  Substructure: Very good,  Channel: Very good,  Operating Rating: 70.6 metric tons,  Method Used To Determine Operating Rating: Load Factor (LF),  Inventory Rating: 42.1 metric tons,  Method Used To Determine Inventory Rating: Load Factor (LF),  Structural Evaluation: Better than present minimum criteria,  Deck Geometry: Superior to present desirable criteria,  Waterway Adequacy: Equal to present desirable criteria,  Approach Roadway Alignment: Better than present minimum criteria,  Designated Inspection Frequency: Every 24 months,  Underwater Inspection Frequency: Every 60 months,  Inspection Date: September 2020,  Underwater Inspection Date: September 2020,  Deck Structure Type: Concrete Cast-file-Place

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Structure Number: 282261,  Location: 0.1 MI. S. OF NW 82ND AVE (Lat: 41.709378,  Lng: -93.755794),  Route carried "on" structure: City street ,  Year Built: 2017,  Status: Open,  Structure Length: 1.56m (5.12ft),  Average Daily Traffic: 230 (year 2008),  Average Future Daily Traffic: 230 (year 2040),  Design Load: HL 93,  Features Intersected: LITTLE BEAVER CREEK,  Facility Carried by Structure: NW 100TH STREET
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 5.686,  Lanes on structure: 2,  Owner: City or Municipal Highway Agency,  Approaching Roadway Width: 9.4m (30.8ft),  Skew: 3 degrees,  Material/Design: Concrete continuous,  Design/Construction: Culvert,  Number Of Spans In Main Unit: 3,  Length of Maximum Span: 4.9m (16.1ft),  Curb or Sidewalk Widths: Left: 0.0m,  Right: 2.7m (8.9ft)

Condition: Channel: Very good,  Culverts: Good,  Operating Rating: 47.3 metric tons,  Method Used To Determine Operating Rating: Load and Resistance Factor Rating (LRFR) rating reported by rating factor(RF) method using HL-93 loadings,  Inventory Rating: 36.6 metric tons,  Method Used To Determine Inventory Rating: Load and Resistance Factor Rating (LRFR) rating reported by rating factor(RF) method using HL-93 loadings,  Structural Evaluation: 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: September 2020

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Structure Number: 28229,  Location: 080253504 (Lat: 41.695372,  Lng: -93.736394),  Route carried "on" structure: County highway ,  Year Built: 1926,  Status: Posted for load,  Structure Length: 1.65m (5.41ft),  Average Daily Traffic: 200 (year 2016),  Average Future Daily Traffic: 200 (year 2041),  Features Intersected: LITTLE BEAVER CREEK,  Facility Carried by Structure: LOCAL
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 0.589,  Lanes on structure: 2,  Owner: County Highway Agency,  Approaching Roadway Width: 9.1m (29.9ft),  Material/Design: Steel,  Design/Construction: Truss - Thru,  Number Of Spans In Main Unit: 1,  Length of Maximum Span: 15.2m (49.9ft),  Curb-To-Curb Width: 5.9m (19.4ft),  Out-to-Out Width: 6.1m (20.0ft)

Condition: Deck: Fair,  Superstructure: Fair,  Substructure: Satisfactory,  Channel: Satisfactory,  Operating Rating: 23.5 metric tons,  Method Used To Determine Operating Rating: Allowable Stress (AS),  Inventory Rating: 15.3 metric tons,  Method Used To Determine Inventory Rating: Allowable Stress (AS),  Structural Evaluation: Meets minimum limits,  Deck Geometry: High priority of corrective action,  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: 20.0 - 29.9% below),  Length Of Structure Improvement: 7.70m (25.26ft),  Designated Inspection Frequency: Every 24 months,  Critical Feature Inspection Frequency: Every 24 months,  Inspection Date: March 2021,  Critical Feature Inspection Date: March 2021,  Bridge Improvement Cost: $185,000,  Roadway Improvement Cost: $19,000,  Deck Structure Type: Concrete Cast-file-Place,  Wearing Surface/Protective System: Wearing Surface: Monolithic Concrete

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Structure Number: 50514,  Location: 000000000 (Lat: 41.672844,  Lng: -93.725125),  Route carried "on" structure: City street ,  Year Built: 2012,  Status: Open,  Structure Length: 6.62m (21.72ft),  Average Daily Traffic: 2,060 (year 2016),  Average Future Daily Traffic: 2,060 (year 2040),  Design Load: HS 20,  Features Intersected: BEAVER CREEK,  Facility Carried by Structure: NW 62ND AVE WB
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 3.774,  Lanes on structure: 2,  Owner: City or Municipal Highway Agency,  Approaching Roadway Width: 9.1m (29.9ft),  Skew: 3 degrees,  Material/Design: Prestressed concrete continuous,  Design/Construction: Stringer/Multi-beam,  Number Of Spans In Main Unit: 3,  Length of Maximum Span: 23.1m (75.8ft),  Curb or Sidewalk Widths: Left: 0.0m,  Right: 4.3m (14.1ft),  Curb-To-Curb Width: 9.1m (29.9ft),  Out-to-Out Width: 14.6m (47.9ft)

Condition: Deck: Good,  Superstructure: Very good,  Substructure: Very good,  Channel: Good,  Operating Rating: 58.1 metric tons,  Method Used To Determine Operating Rating: Load Factor (LF),  Inventory Rating: 34.9 metric tons,  Method Used To Determine Inventory Rating: Load Factor (LF),  Structural Evaluation: Equal to present desirable criteria,  Deck Geometry: Meets minimum limits,  Waterway Adequacy: Superior to present desirable 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: 70042,  Location: 1.0 MI. E OF JCT. IA 28 (Lat: 41.651039,  Lng: -93.680603),  Route carried "on" structure: County highway ,  Year Built: 2016,  Status: Open,  Structure Length: 27.54m (90.35ft),  Average Daily Traffic: 8,400 (year 2016),  Average Future Daily Traffic: 8,400 (year 2040),  Design Load: HL 93,  Features Intersected: I 35 I 80 BEAVER CREEK,  Facility Carried by Structure: NW BEAVER DR
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 0.444,  Lanes on structure: 2,  Lanes under structure: 6,  Owner: State Highway Agency,  Approaching Roadway Width: 14.9m (48.9ft),  Skew: 2 degrees,  Material/Design: Prestressed concrete,  Design/Construction: Stringer/Multi-beam,  Number Of Spans In Main Unit: 7,  Length of Maximum Span: 47.9m (157.2ft),  Curb or Sidewalk Widths: Left: 1.7m (5.6ft),  Right: 0.0m,  Curb-To-Curb Width: 12.2m (40.0ft),  Out-to-Out Width: 14.9m (48.9ft)

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,  Underclear: Equal to present minimum criteria,  Waterway Adequacy: Superior to present desirable criteria,  Approach Roadway Alignment: Equal to present desirable criteria,  Designated Inspection Frequency: Every 24 months,  Inspection Date: July 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: 70042,  Location: 1.0 MI. E OF JCT. IA 28 (Lat: 41.651039,  Lng: -93.680603),  Route carried "under" structure: Interstate 80,  Year Built: 2016,  Structure Length: 0. m,  Average Daily Traffic: 85,600 (year 2020),  Truck Traffic: 19%,  Features Intersected: I 35 I 80 BEAVER CREEK,  Facility Carried by Structure: NW BEAVER DR
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 212.490,  Lanes on structure: 2,  Lanes under structure: 6,  Material/Design: Prestressed concrete,  Design/Construction: Stringer/Multi-beam,  Length of Maximum Span: 47.9m (157.2ft)