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

Find on map >>   Show street view

Structure Number: 7251,  Location: 076050501 (Lat: 41.330697,  Lng: -91.238369),  Route carried "on" structure: City street ,  Year Built: 1986,  Year Reconstructed: 2017,  Status: Open,  Structure Length: 1.74m (5.71ft),  Average Daily Traffic: 740 (year 2018),  Average Future Daily Traffic: 740 (year 2041),  Design Load: H 20,  Features Intersected: INDIAN CREEK,  Facility Carried by Structure: LINN ST
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 0.381,  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: 16.8m (55.1ft),  Curb-To-Curb Width: 9.1m (29.9ft),  Out-to-Out Width: 9.8m (32.2ft)

Condition: Deck: Poor,  Superstructure: Poor,  Substructure: Fair,  Channel: Good,  Operating Rating: 47.1 metric tons,  Method Used To Determine Operating Rating: Load Factor (LF),  Inventory Rating: 20.4 metric tons,  Method Used To Determine Inventory Rating: Load Factor (LF),  Structural Evaluation: Meets minimum limits,  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: 5.50m (18.04ft),  Designated Inspection Frequency: Every 24 months,  Inspection Date: August 2021,  Bridge Improvement Cost: $15,000,  Roadway Improvement Cost: $2,000,  Deck Structure Type: Concrete Cast-file-Place,  Wearing Surface/Protective System: Wearing Surface: Monolithic Concrete

Find on map >>   Show street view

Structure Number: 34031,  Location: 3.4 mi N of W Jct IA 92 (Lat: 41.324911,  Lng: -91.200950),  Route carried "on" structure: US 61,  Year Built: 1977,  Status: Open,  Structure Length: 5.49m (18.01ft),  Average Daily Traffic: 3,350 (year 2020),  Truck Traffic: 18%,  Average Future Daily Traffic: 3,350 (year 2041),  Design Load: HS 20,  Features Intersected: DME RR
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 123.028,  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: 19.8m (65.0ft),  Curb-To-Curb Width: 13.4m (44.0ft),  Out-to-Out Width: 14.4m (47.2ft)

Condition: Deck: Fair,  Superstructure: Good,  Substructure: Good,  Operating Rating: 71.6 metric tons,  Method Used To Determine Operating Rating: Load Factor (LF),  Inventory Rating: 36.5 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,  Underclear: Equal to present minimum criteria,  Approach Roadway Alignment: Better than present minimum criteria,  Designated Inspection Frequency: Every 24 months,  Inspection Date: January 2021,  Deck Structure Type: Concrete Cast-file-Place,  Wearing Surface/Protective System: Wearing Surface: Monolithic Concrete,  Deck Protection: Epoxy Coated Reinforcing

Find on map >>   Show street view

Structure Number: 34151,  Location: 1.1 mi. W of Jct. SR X43 (Lat: 41.277367,  Lng: -91.256228),  Route carried "on" structure: State highway 92,  Year Built: 1992,  Status: Open,  Structure Length: 3.14m (10.30ft),  Average Daily Traffic: 2,760 (year 2020),  Truck Traffic: 29%,  Average Future Daily Traffic: 2,760 (year 2040),  Design Load: HS 20,  Features Intersected: INDIAN CREEK
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 411.313,  Lanes on structure: 2,  Base Highway Network: Yes,  Owner: State Highway Agency,  Approaching Roadway Width: 13.4m (44.0ft),  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: 13.4m (44.0ft),  Out-to-Out Width: 14.4m (47.2ft)

Condition: Deck: Satisfactory,  Superstructure: Satisfactory,  Substructure: Good,  Channel: Satisfactory,  Operating Rating: 86.8 metric tons,  Method Used To Determine Operating Rating: Load Factor (LF),  Inventory Rating: 52.1 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 minimum 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

Find on map >>   Show street view

Structure Number: 2244,  Location: 075030603 (Lat: 41.328067,  Lng: -91.244833),  Route carried "on" structure: County highway ,  Year Built: 1960,  Status: Open,  Structure Length: 1.10m (3.61ft),  Average Daily Traffic: 590 (year 2018),  Truck Traffic: 22%,  Average Future Daily Traffic: 590 (year 2041),  Design Load: H 20,  Features Intersected: SMALL STREAM,  Facility Carried by Structure: FM
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 12.641,  Lanes on structure: 2,  Owner: County Highway Agency,  Approaching Roadway Width: 9.1m (29.9ft),  Skew: 4 degrees,  Material/Design: Concrete continuous,  Design/Construction: Culvert,  Number Of Spans In Main Unit: 2,  Length of Maximum Span: 5.2m (17.1ft)

Condition: Channel: Satisfactory,  Culverts: Fair,  Operating Rating: 69.1 metric tons,  Method Used To Determine Operating Rating: Load Factor (LF),  Inventory Rating: 41.5 metric tons,  Method Used To Determine Inventory Rating: Load Factor (LF),  Structural Evaluation: Somewhat better than minimum adequacy,  Waterway Adequacy: Better than present minimum criteria,  Approach Roadway Alignment: Better than present minimum criteria,  Length Of Structure Improvement: 3.60m (11.81ft),  Designated Inspection Frequency: Every 24 months,  Inspection Date: August 2021,  Bridge Improvement Cost: $115,000,  Roadway Improvement Cost: $10,000

Find on map >>   Show street view

Structure Number: 224501,  Location: 075041201 (Lat: 41.321036,  Lng: -91.259086),  Route carried "on" structure: County highway ,  Year Built: 1987,  Status: Open,  Structure Length: 0.64m (2.10ft),  Average Daily Traffic: 40 (year 2014),  Average Future Daily Traffic: 40 (year 2039),  Design Load: HS 20,  Features Intersected: INDIAN CREEK,  Facility Carried by Structure: LOCAL
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 7.707,  Lanes on structure: 2,  Owner: County Highway Agency,  Approaching Roadway Width: 6.4m (21.0ft),  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: 44.1 metric tons,  Method Used To Determine Operating Rating: Assigned rating based on Load Factor Design (LFD) reported in metric tons,  Inventory Rating: 32.7 metric tons,  Method Used To Determine Inventory Rating: Assigned rating based on Load Factor Design (LFD) reported in metric tons,  Structural Evaluation: Better than present minimum criteria,  Waterway Adequacy: Better than present minimum criteria,  Approach Roadway Alignment: Better than present minimum criteria,  Designated Inspection Frequency: Every 48 months,  Inspection Date: August 2019

Find on map >>   Show street view

Structure Number: 22451,  Location: 075041301 (Lat: 41.306456,  Lng: -91.273250),  Route carried "on" structure: County highway ,  Year Built: 1969,  Status: Open,  Structure Length: 0.91m (2.99ft),  Average Daily Traffic: 60 (year 2014),  Average Future Daily Traffic: 60 (year 2040),  Design Load: H 20,  Features Intersected: INDIAN CREEK,  Facility Carried by Structure: LOCAL
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 5.612,  Lanes on structure: 2,  Owner: County Highway Agency,  Approaching Roadway Width: 9.1m (29.9ft),  Skew: 4 degrees,  Material/Design: Concrete continuous,  Design/Construction: Culvert,  Number Of Spans In Main Unit: 2,  Length of Maximum Span: 4.6m (15.1ft)

Condition: Channel: Good,  Culverts: Fair,  Operating Rating: 63.0 metric tons,  Method Used To Determine Operating Rating: Load Factor (LF),  Inventory Rating: 37.7 metric tons,  Method Used To Determine Inventory Rating: Load Factor (LF),  Structural Evaluation: Somewhat better than minimum adequacy,  Waterway Adequacy: Equal to present minimum criteria,  Approach Roadway Alignment: Somewhat better than minimum adequacy,  Length Of Structure Improvement: 5.00m (16.40ft),  Designated Inspection Frequency: Every 24 months,  Inspection Date: August 2020,  Bridge Improvement Cost: $158,000,  Roadway Improvement Cost: $16,000

Find on map >>   Show street view

Structure Number: 224561,  Location: 075042401 (Lat: 41.292011,  Lng: -91.273017),  Route carried "on" structure: County highway ,  Year Built: 1980,  Status: Open,  Structure Length: 2.74m (8.99ft),  Average Daily Traffic: 35 (year 2014),  Average Future Daily Traffic: 35 (year 2040),  Design Load: H 20,  Features Intersected: INDIAN CREEK,  Facility Carried by Structure: LOCAL
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 5.506,  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: 10.4m (34.1ft),  Curb-To-Curb Width: 9.1m (29.9ft),  Out-to-Out Width: 9.8m (32.2ft)

Condition: Deck: Satisfactory,  Superstructure: Satisfactory,  Substructure: Satisfactory,  Channel: Satisfactory,  Operating Rating: 48.5 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: 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,  Designated Inspection Frequency: Every 24 months,  Inspection Date: August 2020,  Deck Structure Type: Concrete Cast-file-Place,  Wearing Surface/Protective System: Wearing Surface: Monolithic Concrete

Find on map >>   Show street view

Structure Number: 224571,  Location: 075042503 (Lat: 41.270350,  Lng: -91.259819),  Route carried "on" structure: County highway ,  Year Built: 1982,  Status: Open,  Structure Length: 3.14m (10.30ft),  Average Daily Traffic: 50 (year 2014),  Average Future Daily Traffic: 50 (year 2040),  Design Load: H 20,  Features Intersected: INDIAN CREEK,  Facility Carried by Structure: LOCAL
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 5.832,  Lanes on structure: 2,  Owner: County Highway Agency,  Approaching Roadway Width: 7.0m (23.0ft),  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: Good,  Superstructure: Good,  Substructure: Satisfactory,  Channel: Satisfactory,  Operating Rating: 49.6 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: Better than present minimum criteria,  Waterway Adequacy: Equal to present desirable criteria,  Approach Roadway Alignment: Better than present minimum criteria,  Designated Inspection Frequency: Every 24 months,  Inspection Date: August 2020,  Deck Structure Type: Concrete Cast-file-Place,  Wearing Surface/Protective System: Wearing Surface: Monolithic Concrete

Find on map >>   Show street view

Structure Number: 25705,  Location: 076031808 (Lat: 41.381436,  Lng: -91.253411),  Route carried "on" structure: County highway ,  Year Built: 1951,  Status: Open,  Structure Length: 0.67m (2.20ft),  Average Daily Traffic: 10 (year 2014),  Average Future Daily Traffic: 10 (year 2041),  Design Load: H 20,  Features Intersected: CREEK,  Facility Carried by Structure: LOCAL
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 2.675,  Lanes on structure: 2,  Owner: County Highway Agency,  Approaching Roadway Width: 10.1m (33.1ft),  Skew: 1 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: Satisfactory,  Culverts: Fair,  Inventory Rating: 69.3 metric tons,  Method Used To Determine Inventory Rating: Load Factor (LF),  Structural Evaluation: Somewhat better than minimum adequacy,  Waterway Adequacy: Better than present minimum criteria,  Approach Roadway Alignment: Equal to present minimum criteria,  Length Of Structure Improvement: 2.10m (6.89ft),  Designated Inspection Frequency: Every 24 months,  Inspection Date: September 2021,  Bridge Improvement Cost: $15,000,  Roadway Improvement Cost: $2,000

Find on map >>   Show street view

Structure Number: 25706,  Location: 076031813 (Lat: 41.379256,  Lng: -91.247239),  Route carried "on" structure: County highway ,  Year Built: 1970,  Status: Open,  Structure Length: 0.64m (2.10ft),  Average Daily Traffic: 180 (year 2018),  Average Future Daily Traffic: 180 (year 2041),  Design Load: H 20,  Features Intersected: CREEK,  Facility Carried by Structure: FM
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 3.568,  Lanes on structure: 2,  Owner: County Highway Agency,  Approaching Roadway Width: 9.1m (29.9ft),  Material/Design: Concrete continuous,  Design/Construction: Culvert,  Number Of Spans In Main Unit: 2,  Length of Maximum Span: 3.0m (9.8ft)

Condition: Channel: Poor,  Culverts: Poor,  Operating Rating: 30.8 metric tons,  Method Used To Determine Operating Rating: Field evaluation and documented engineering judgment,  Inventory Rating: 22.7 metric tons,  Method Used To Determine Inventory Rating: Field evaluation and documented engineering judgment,  Structural Evaluation: Meets minimum limits,  Waterway Adequacy: Equal to present minimum criteria,  Approach Roadway Alignment: Better than present minimum criteria,  Length Of Structure Improvement: 4.00m (13.12ft),  Designated Inspection Frequency: Every 24 months,  Inspection Date: September 2021,  Bridge Improvement Cost: $200,000,  Roadway Improvement Cost: $20,000

Find on map >>   Show street view

Structure Number: 2572,  Location: 076041308 (Lat: 41.386792,  Lng: -91.268042),  Route carried "on" structure: County highway ,  Year Built: 1954,  Status: Open,  Structure Length: 0.76m (2.49ft),  Average Daily Traffic: 180 (year 2018),  Average Future Daily Traffic: 180 (year 2041),  Design Load: H 20,  Features Intersected: CREEK,  Facility Carried by Structure: FM
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 1.003,  Lanes on structure: 2,  Owner: County Highway Agency,  Approaching Roadway Width: 6.4m (21.0ft),  Material/Design: Concrete continuous,  Design/Construction: Culvert,  Number Of Spans In Main Unit: 2,  Length of Maximum Span: 3.7m (12.1ft)

Condition: Channel: Fair,  Culverts: Fair,  Operating Rating: 54.9 metric tons,  Method Used To Determine Operating Rating: Load Factor (LF),  Inventory Rating: 32.8 metric tons,  Method Used To Determine Inventory Rating: Load Factor (LF),  Structural Evaluation: Somewhat better than minimum adequacy,  Waterway Adequacy: Better than present minimum criteria,  Approach Roadway Alignment: Somewhat better than minimum adequacy,  Length Of Structure Improvement: 2.50m (8.20ft),  Designated Inspection Frequency: Every 24 months,  Inspection Date: September 2021,  Bridge Improvement Cost: $15,000,  Roadway Improvement Cost: $2,000

Find on map >>   Show street view

Structure Number: 700265,  Location: 3.4 mi. N of W Jct. IA 92 (Lat: 41.325469,  Lng: -91.201594),  Route carried "on" structure: US 61,  Year Built: 2016,  Status: Open,  Structure Length: 5.47m (17.95ft),  Average Daily Traffic: 3,350 (year 2020),  Truck Traffic: 18%,  Average Future Daily Traffic: 3,350 (year 2041),  Design Load: HL 93,  Features Intersected: DME RR
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 186.016,  Lanes on structure: 2,  Owner: State Highway Agency,  Approaching Roadway Width: 12.2m (40.0ft),  Skew: 1 degrees,  Material/Design: Prestressed concrete,  Design/Construction: Stringer/Multi-beam,  Number Of Spans In Main Unit: 3,  Length of Maximum Span: 19.8m (65.0ft),  Curb-To-Curb Width: 12.2m (40.0ft),  Out-to-Out Width: 13.2m (43.3ft)

Condition: Deck: Good,  Superstructure: Very good,  Substructure: 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: Better than present minimum criteria,  Deck Geometry: Better than present minimum criteria,  Approach Roadway Alignment: Equal to present desirable criteria,  Designated Inspection Frequency: Every 24 months,  Inspection Date: January 2021,  Deck Structure Type: Concrete Cast-file-Place,  Wearing Surface/Protective System: Wearing Surface: Monolithic Concrete,  Deck Protection: Epoxy Coated Reinforcing