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Bridge Statistics for Healdsburg, California (CA)
Condition, Traffic, Stress, Structural Evaluation, Project Costs


  • National Bridge Inventory (NBI) Statistics
  • 47Number of bridges
  • 745ft / 227mTotal length
  • $15,297,000Total costs
  • 574,666Total average daily traffic
  • 63,716Total average daily truck traffic
  • National Bridge Inventory (NBI) Registered Bridges for Healdsburg
  • No street view available for this location

New bridges in Healdsburg, CA - historical statistics
  • New bridges - historical statistics
  • 11910-1919
  • 51920-1929
  • 11930-1939
  • 11940-1949
  • 11950-1959
  • 251960-1969
  • 71970-1979
  • 31980-1989
  • 31990-1999
Reconstructed bridges in Healdsburg, CA - Historical Statistics
  • Reconstructed bridges - Historical Statistics
  • 21960-1969
  • 21970-1979
  • 01980-1989
  • 01990-1999
  • 12000-2009
  • 12010-2019
Average Bridge Daily Traffic in Healdsburg, CA
Bridge Condition - Deck
  • Bridge Condition - Deck
  • 37.1%Good
  • 14.3%Satisfactory
  • 40.0%Fair
  • 8.6%Poor
Bridge Condition - Superstructure
  • Bridge Condition - Superstructure
  • 60.0%Good
  • 2.9%Satisfactory
  • 37.1%Fair
Bridge Condition - Substructure
  • Bridge Condition - Substructure
  • 65.7%Good
  • 2.9%Satisfactory
  • 28.6%Fair
  • 2.9%Poor
Bridge Condition - Channel
  • Bridge Condition - Channel
  • 15.0%Excellent
  • 10.0%Very good
  • 55.0%Good
  • 10.0%Satisfactory
  • 10.0%Fair
Bridge Condition - Culverts
  • Bridge Condition - Culverts
  • 33.3%Good
  • 66.7%Satisfactory
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Structure Number: 20 004,  Location: 04-SON-128-12.19 (Lat: 38.669531,  Lng: -122.810394),  Route carried "on" structure: State highway 128,  Year Built: 1984,  Status: Open,  Structure Length: 3.26m (10.70ft),  Average Daily Traffic: 2,750 (year 2016),  Truck Traffic: 6%,  Average Future Daily Traffic: 3,200 (year 2038),  Design Load: HS 20+Mod,  Features Intersected: SAUSAL CREEK
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 12.190,  Lanes on structure: 2,  Base Highway Network: Yes (Inventory Route: 1,  Subroute: 1),  Owner: State Highway Agency,  Approaching Roadway Width: 7.6m (24.9ft),  Skew: 3 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: 0.2m (0.7ft),  Right: 0.2m (0.7ft),  Curb-To-Curb Width: 9.8m (32.2ft),  Out-to-Out Width: 10.8m (35.4ft)

Condition: Deck: Fair,  Superstructure: Fair,  Substructure: Good,  Channel: Very good,  Operating Rating: 54.1 metric tons,  Method Used To Determine Operating Rating: Assigned rating based on Load Factor Design (LFD) reported in metric tons,  Inventory Rating: 32.4 metric tons,  Method Used To Determine Inventory Rating: Assigned rating based on Load Factor Design (LFD) reported in metric tons,  Structural Evaluation: Somewhat better than minimum adequacy,  Deck Geometry: Meets minimum limits,  Waterway Adequacy: Equal to present desirable criteria,  Approach Roadway Alignment: Superior to present desirable criteria,  Designated Inspection Frequency: Every 24 months,  Inspection Date: October 2020,  Deck Structure Type: Concrete Cast-file-Place
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Structure Number: 20 0066,  Location: 04-SON-101-32.79 (Lat: 38.587469,  Lng: -122.844225),  Route carried "on" structure: County highway ,  Year Built: 1962,  Status: Open,  Structure Length: 5.67m (18.60ft),  Average Daily Traffic: 1,800 (year 2015),  Truck Traffic: 2%,  Average Future Daily Traffic: 6,244 (year 2038),  Design Load: HS 20,  Features Intersected: US HIGHWAY 101,  Facility Carried by Structure: LIMERICK LANE
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 0.000,  Lanes on structure: 2,  Lanes under structure: 4,  Owner: State Highway Agency,  Approaching Roadway Width: 7.3m (24.0ft),  Skew: 3 degrees,  Material/Design: Concrete continuous,  Design/Construction: Box Beam or Girders - Multiple,  Number Of Spans In Main Unit: 2,  Length of Maximum Span: 27.4m (89.9ft),  Curb or Sidewalk Widths: Left: 1.5m (4.9ft),  Right: 0.0m,  Curb-To-Curb Width: 9.8m (32.2ft),  Out-to-Out Width: 12.3m (40.4ft)

Condition: Deck: Fair,  Superstructure: Good,  Substructure: Good,  Operating Rating: 40.2 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: 30.8 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,  Deck Geometry: Somewhat better than minimum adequacy,  Underclear: High priority of corrective action,  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
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Structure Number: 20 0067L,  Location: 04-SON-101-33.48 (Lat: 38.594578,  Lng: -122.852481),  Route carried "on" structure: US 101,  Year Built: 1962,  Status: Open,  Structure Length: 7.50m (24.61ft),  Average Daily Traffic: 22,750 (year 2015),  Truck Traffic: 13%,  Average Future Daily Traffic: 43,153 (year 2038),  Design Load: HS 20,  Features Intersected: HEALDSBURG AVENUE
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 33.480,  Lanes on structure: 2,  Lanes under structure: 4,  Base Highway Network: Yes (Inventory Route: 1,  Subroute: 1),  Owner: State Highway Agency,  Approaching Roadway Width: 11.3m (37.1ft),  Skew: 5 degrees,  Material/Design: Prestressed concrete,  Design/Construction: Stringer/Multi-beam,  Number Of Spans In Main Unit: 2,  Number Of Approach Spans: 2,  Length of Maximum Span: 23.2m (76.1ft),  Curb-To-Curb Width: 11.3m (37.1ft),  Out-to-Out Width: 12.1m (39.7ft)

Condition: Deck: Fair,  Superstructure: Good,  Substructure: Good,  Operating Rating: 35.3 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: 20.1 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: Somewhat better than minimum adequacy,  Deck Geometry: Somewhat better than minimum adequacy,  Underclear: Meets minimum limits,  Approach Roadway Alignment: Equal to present desirable criteria,  Designated Inspection Frequency: Every 24 months,  Inspection Date: April 2021,  Deck Structure Type: Concrete Cast-file-Place
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Structure Number: 20 0067R,  Location: 04-SON-101-33.48 (Lat: 38.594894,  Lng: -122.852633),  Route carried "on" structure: US 101,  Year Built: 1962,  Status: Open,  Structure Length: 7.50m (24.61ft),  Average Daily Traffic: 22,750 (year 2013),  Truck Traffic: 13%,  Average Future Daily Traffic: 43,153 (year 2039),  Design Load: HS 20,  Features Intersected: HEALDSBURG AVENUE
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 33.480,  Lanes on structure: 2,  Lanes under structure: 4,  Base Highway Network: Yes (Inventory Route: 1,  Subroute: 1),  Owner: State Highway Agency,  Approaching Roadway Width: 11.0m (36.1ft),  Skew: 5 degrees,  Material/Design: Prestressed concrete,  Design/Construction: Stringer/Multi-beam,  Number Of Spans In Main Unit: 2,  Number Of Approach Spans: 2,  Length of Maximum Span: 23.2m (76.1ft),  Curb-To-Curb Width: 11.3m (37.1ft),  Out-to-Out Width: 12.1m (39.7ft)

Condition: Deck: Fair,  Superstructure: Good,  Substructure: Good,  Operating Rating: 43.1 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: 22.0 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: Somewhat better than minimum adequacy,  Deck Geometry: Somewhat better than minimum adequacy,  Underclear: Meets minimum limits,  Approach Roadway Alignment: Equal to present desirable criteria,  Length Of Structure Improvement: 7.50m (24.61ft),  Designated Inspection Frequency: Every 24 months,  Inspection Date: April 2021,  Deck Structure Type: Concrete Cast-file-Place
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Structure Number: 20 0082,  Location: 04-SON-101-14.02-RNPK (Lat: 38.350481,  Lng: -122.712914),  Route carried "on" structure: US 101,  Year Built: 1968,  Year Reconstructed: 1970,  Status: Open,  Structure Length: 1.46m (4.79ft),  Average Daily Traffic: 92,000 (year 2016),  Truck Traffic: 6%,  Average Future Daily Traffic: 166,227 (year 2038),  Design Load: HS 20+Mod,  Features Intersected: HINEBAUGH CREEK
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 14.020,  Lanes on structure: 11,  Base Highway Network: Yes (Inventory Route: 1,  Subroute: 1),  Owner: State Highway Agency,  Approaching Roadway Width: 89.5m (293.6ft),  Skew: 10 degrees,  Material/Design: Concrete continuous,  Design/Construction: Culvert,  Number Of Spans In Main Unit: 4,  Length of Maximum Span: 3.4m (11.2ft)

Condition: Channel: Excellent,  Culverts: Satisfactory,  Operating Rating: 54.1 metric tons,  Method Used To Determine Operating Rating: Field evaluation and documented engineering judgment,  Inventory Rating: 32.4 metric tons,  Method Used To Determine Inventory Rating: Field evaluation and documented engineering judgment,  Structural Evaluation: 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: April 2020
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Structure Number: 20 0085L,  Location: 04-SON-101-34.55-HLBG (Lat: 38.603906,  Lng: -122.868433),  Route carried "on" structure: US 101,  Year Built: 1960,  Status: Open,  Structure Length: 3.78m (12.40ft),  Average Daily Traffic: 22,500 (year 2015),  Truck Traffic: 13%,  Average Future Daily Traffic: 34,158 (year 2038),  Design Load: HS 20+Mod,  Features Intersected: HEALDSBURG AV-S101 ON-RP
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 34.550,  Lanes on structure: 2,  Lanes under structure: 1,  Base Highway Network: Yes (Inventory Route: 1,  Subroute: 1),  Owner: State Highway Agency,  Approaching Roadway Width: 11.3m (37.1ft),  Skew: 3 degrees,  Material/Design: Concrete continuous,  Design/Construction: Tee Beam,  Number Of Spans In Main Unit: 3,  Length of Maximum Span: 16.5m (54.1ft),  Curb or Sidewalk Widths: Left: 0.6m (2.0ft),  Right: 0.6m (2.0ft),  Curb-To-Curb Width: 11.3m (37.1ft),  Out-to-Out Width: 12.7m (41.7ft)

Condition: Deck: Fair,  Superstructure: Good,  Substructure: Good,  Operating Rating: 36.6 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: 28.5 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,  Deck Geometry: Somewhat better than minimum adequacy,  Underclear: High priority of corrective action,  Approach Roadway Alignment: Equal to present desirable criteria,  Designated Inspection Frequency: Every 24 months,  Inspection Date: April 2021,  Deck Structure Type: Concrete Cast-file-Place
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Structure Number: 20 0085R,  Location: 04-SON-101-34.55-HLBG (Lat: 38.604144,  Lng: -122.868381),  Route carried "on" structure: US 101,  Year Built: 1960,  Status: Open,  Structure Length: 3.78m (12.40ft),  Average Daily Traffic: 22,750 (year 2015),  Truck Traffic: 13%,  Average Future Daily Traffic: 43,153 (year 2039),  Design Load: HS 20,  Features Intersected: HEALDSBURG AV-S101 ON-RP
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 34.550,  Lanes on structure: 2,  Lanes under structure: 4,  Base Highway Network: Yes (Inventory Route: 1,  Subroute: 1),  Owner: State Highway Agency,  Approaching Roadway Width: 11.3m (37.1ft),  Skew: 3 degrees,  Material/Design: Concrete continuous,  Design/Construction: Tee Beam,  Number Of Spans In Main Unit: 3,  Length of Maximum Span: 16.5m (54.1ft),  Curb or Sidewalk Widths: Left: 0.6m (2.0ft),  Right: 0.6m (2.0ft),  Curb-To-Curb Width: 11.3m (37.1ft),  Out-to-Out Width: 12.7m (41.7ft)

Condition: Deck: Fair,  Superstructure: Good,  Substructure: Good,  Operating Rating: 36.6 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: 28.5 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,  Deck Geometry: Somewhat better than minimum adequacy,  Underclear: Somewhat better than minimum adequacy,  Approach Roadway Alignment: Equal to present desirable criteria,  Designated Inspection Frequency: Every 24 months,  Inspection Date: April 2021,  Deck Structure Type: Concrete Cast-file-Place
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Structure Number: 20 0088L,  Location: 04-SON-101-33.22 (Lat: 38.592464,  Lng: -122.848556),  Route carried "on" structure: US 101,  Year Built: 1962,  Status: Open,  Structure Length: 7.16m (23.49ft),  Average Daily Traffic: 22,750 (year 2019),  Truck Traffic: 15%,  Average Future Daily Traffic: 50,753 (year 2038),  Design Load: HS 20+Mod,  Features Intersected: NWP RR/NCRRA
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 33.220,  Lanes on structure: 2,  Base Highway Network: Yes (Inventory Route: 1,  Subroute: 1),  Owner: State Highway Agency,  Approaching Roadway Width: 12.5m (41.0ft),  Skew: 5 degrees,  Material/Design: Prestressed concrete,  Design/Construction: Stringer/Multi-beam,  Number Of Spans In Main Unit: 3,  Length of Maximum Span: 23.2m (76.1ft),  Curb-To-Curb Width: 12.5m (41.0ft),  Out-to-Out Width: 13.8m (45.3ft)

Condition: Deck: Fair,  Superstructure: Good,  Substructure: Good,  Operating Rating: 42.1 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: 22.7 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: Somewhat better than minimum adequacy,  Deck Geometry: Better than present minimum criteria,  Underclear: Somewhat better than minimum adequacy,  Approach Roadway Alignment: Equal to present desirable criteria,  Designated Inspection Frequency: Every 24 months,  Inspection Date: April 2021,  Deck Structure Type: Concrete Cast-file-Place
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Structure Number: 20 0088R,  Location: 04-SON-101-33.22 (Lat: 38.592800,  Lng: -122.848678),  Route carried "on" structure: US 101,  Year Built: 1962,  Status: Open,  Structure Length: 6.98m (22.90ft),  Average Daily Traffic: 22,750 (year 2017),  Truck Traffic: 15%,  Average Future Daily Traffic: 50,753 (year 2039),  Design Load: HS 20+Mod,  Features Intersected: NWP RR/NCRRA
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 33.220,  Lanes on structure: 2,  Base Highway Network: Yes (Inventory Route: 1,  Subroute: 1),  Owner: State Highway Agency,  Approaching Roadway Width: 11.3m (37.1ft),  Skew: 5 degrees,  Material/Design: Prestressed concrete,  Design/Construction: Stringer/Multi-beam,  Number Of Spans In Main Unit: 3,  Length of Maximum Span: 22.6m (74.1ft),  Curb-To-Curb Width: 11.3m (37.1ft),  Out-to-Out Width: 12.1m (39.7ft)

Condition: Deck: Satisfactory,  Superstructure: Good,  Substructure: Good,  Operating Rating: 38.6 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: 21.1 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: Somewhat better than minimum adequacy,  Deck Geometry: Somewhat better than minimum adequacy,  Underclear: Somewhat better than minimum adequacy,  Approach Roadway Alignment: Better than present minimum criteria,  Designated Inspection Frequency: Every 24 months,  Inspection Date: April 2021,  Deck Structure Type: Concrete Cast-file-Place
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Structure Number: 20 0144,  Location: 04-SON-101-36.27 (Lat: 38.626025,  Lng: -122.878028),  Route carried "on" structure: US 101,  Year Built: 1960,  Status: Open,  Structure Length: 5.39m (17.68ft),  Average Daily Traffic: 45,500 (year 2015),  Truck Traffic: 13%,  Average Future Daily Traffic: 86,306 (year 2038),  Design Load: HS 20,  Features Intersected: DRY CREEK ROAD
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 36.270,  Lanes on structure: 4,  Lanes under structure: 2,  Base Highway Network: Yes (Inventory Route: 1,  Subroute: 1),  Owner: State Highway Agency,  Approaching Roadway Width: 26.2m (86.0ft),  Skew: 30 degrees,  Material/Design: Concrete continuous,  Design/Construction: Box Beam or Girders - Multiple,  Number Of Spans In Main Unit: 3,  Length of Maximum Span: 26.5m (86.9ft),  Curb-To-Curb Width: 22.6m (74.1ft),  Out-to-Out Width: 27.8m (91.2ft)

Condition: Deck: Poor,  Superstructure: Good,  Substructure: Good,  Operating Rating: 42.8 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: 33.0 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,  Deck Geometry: Superior to present desirable criteria,  Underclear: Better than present minimum criteria,  Approach Roadway Alignment: Equal to present desirable criteria,  Length Of Structure Improvement: 5.39m (17.68ft),  Designated Inspection Frequency: Every 24 months,  Inspection Date: April 2021,  Deck Structure Type: Concrete Cast-file-Place
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Structure Number: 20 0146L,  Location: 04-SON-101-36.95 (Lat: 38.635886,  Lng: -122.877558),  Route carried "on" structure: US 101,  Year Built: 1960,  Status: Open,  Structure Length: 4.27m (14.01ft),  Average Daily Traffic: 22,500 (year 2019),  Truck Traffic: 13%,  Average Future Daily Traffic: 34,158 (year 2038),  Design Load: HS 20,  Features Intersected: CHIQUITA ROAD
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 36.950,  Lanes on structure: 2,  Lanes under structure: 2,  Base Highway Network: Yes (Inventory Route: 1,  Subroute: 1),  Owner: State Highway Agency,  Approaching Roadway Width: 11.4m (37.4ft),  Skew: 2 degrees,  Material/Design: Concrete continuous,  Design/Construction: Tee Beam,  Number Of Spans In Main Unit: 3,  Length of Maximum Span: 18.9m (62.0ft),  Curb or Sidewalk Widths: Left: 0.6m (2.0ft),  Right: 0.0m,  Curb-To-Curb Width: 11.4m (37.4ft),  Out-to-Out Width: 12.8m (42.0ft)

Condition: Deck: Poor,  Superstructure: Good,  Substructure: Good,  Operating Rating: 39.5 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: 30.5 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,  Deck Geometry: Somewhat better than minimum adequacy,  Underclear: Somewhat better than minimum adequacy,  Approach Roadway Alignment: Equal to present desirable criteria,  Length Of Structure Improvement: 4.27m (14.01ft),  Designated Inspection Frequency: Every 24 months,  Inspection Date: April 2021,  Bridge Improvement Cost: $547,000,  Roadway Improvement Cost: $109,000,  Total Project Cost: $918,000 ( Estimate for 2020),  Deck Structure Type: Concrete Cast-file-Place
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Structure Number: 20 0146R,  Location: 04-SON-101-36.95 (Lat: 38.635800,  Lng: -122.877392),  Route carried "on" structure: US 101,  Year Built: 1960,  Status: Open,  Structure Length: 4.27m (14.01ft),  Average Daily Traffic: 22,750 (year 2015),  Truck Traffic: 13%,  Average Future Daily Traffic: 43,153 (year 2039),  Design Load: HS 20,  Features Intersected: CHIQUITA ROAD
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 36.950,  Lanes on structure: 2,  Lanes under structure: 2,  Base Highway Network: Yes (Inventory Route: 1,  Subroute: 1),  Owner: State Highway Agency,  Approaching Roadway Width: 11.4m (37.4ft),  Skew: 2 degrees,  Material/Design: Concrete continuous,  Design/Construction: Tee Beam,  Number Of Spans In Main Unit: 3,  Length of Maximum Span: 18.9m (62.0ft),  Curb or Sidewalk Widths: Left: 0.0m,  Right: 0.6m (2.0ft),  Curb-To-Curb Width: 11.4m (37.4ft),  Out-to-Out Width: 12.8m (42.0ft)

Condition: Deck: Fair,  Superstructure: Good,  Substructure: Good,  Operating Rating: 39.5 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: 30.5 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,  Deck Geometry: Somewhat better than minimum adequacy,  Underclear: Somewhat better than minimum adequacy,  Approach Roadway Alignment: Equal to present desirable criteria,  Designated Inspection Frequency: Every 24 months,  Inspection Date: April 2021,  Deck Structure Type: Concrete Cast-file-Place
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Structure Number: 20 0147,  Location: 04-SON-101-34.88 (Lat: 38.607158,  Lng: -122.872703),  Route carried "on" structure: US 101,  Year Built: 1960,  Status: Open,  Structure Length: 5.55m (18.21ft),  Average Daily Traffic: 45,500 (year 2017),  Truck Traffic: 13%,  Average Future Daily Traffic: 86,306 (year 2039),  Design Load: HS 20+Mod,  Features Intersected: WESTSIDE RD
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 34.880,  Lanes on structure: 4,  Lanes under structure: 2,  Base Highway Network: Yes (Inventory Route: 1,  Subroute: 1),  Owner: State Highway Agency,  Approaching Roadway Width: 26.2m (86.0ft),  Skew: 31 degrees,  Material/Design: Concrete continuous,  Design/Construction: Box Beam or Girders - Multiple,  Number Of Spans In Main Unit: 3,  Length of Maximum Span: 28.0m (91.9ft),  Curb-To-Curb Width: 22.6m (74.1ft),  Out-to-Out Width: 27.8m (91.2ft)

Condition: Deck: Poor,  Superstructure: Good,  Substructure: Good,  Operating Rating: 41.1 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: 31.8 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,  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: April 2021,  Deck Structure Type: Concrete Cast-file-Place
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Structure Number: 20 0233R,  Location: 04-SON-101-R38.56 (Lat: 38.659328,  Lng: -122.874139),  Route carried "on" structure: US 101,  Year Built: 1974,  Status: Open,  Structure Length: 4.97m (16.31ft),  Average Daily Traffic: 14,250 (year 2015),  Truck Traffic: 11%,  Average Future Daily Traffic: 26,575 (year 2039),  Design Load: HS 20,  Features Intersected: LYTTON SPRINGS ROAD
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 38.560,  Lanes on structure: 2,  Lanes under structure: 2,  Base Highway Network: Yes (Inventory Route: 1,  Subroute: 1),  Owner: State Highway Agency,  Approaching Roadway Width: 11.9m (39.0ft),  Skew: 3 degrees,  Material/Design: Prestressed concrete,  Design/Construction: Box Beam or Girders - Multiple,  Number Of Spans In Main Unit: 1,  Length of Maximum Span: 49.1m (161.1ft),  Curb-To-Curb Width: 11.9m (39.0ft),  Out-to-Out Width: 12.5m (41.0ft)

Condition: Deck: Good,  Superstructure: Good,  Substructure: Fair,  Operating Rating: 51.5 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: 32.1 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: Somewhat better than minimum adequacy,  Deck Geometry: Better than present minimum criteria,  Underclear: Better than present minimum criteria,  Approach Roadway Alignment: Superior to present desirable criteria,  Designated Inspection Frequency: Every 24 months,  Inspection Date: April 2021,  Deck Structure Type: Concrete Cast-file-Place
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Structure Number: 20 0273L,  Location: 04-SON-101-33.78-HLBG (Lat: 38.597003,  Lng: -122.857175),  Route carried "on" structure: US 101,  Year Built: 1999,  Status: Open,  Structure Length: 23.56m (77.30ft),  Average Daily Traffic: 22,750 (year 2019),  Truck Traffic: 13%,  Average Future Daily Traffic: 43,153 (year 2038),  Design Load: HS 20+Mod,  Features Intersected: RUSSIAN RIVER
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 33.780,  Lanes on structure: 2,  Base Highway Network: Yes (Inventory Route: 1,  Subroute: 1),  Owner: State Highway Agency,  Approaching Roadway Width: 11.9m (39.0ft),  Material/Design: Prestressed concrete continuous,  Design/Construction: Box Beam or Girders - Multiple,  Number Of Spans In Main Unit: 4,  Length of Maximum Span: 66.4m (217.8ft),  Curb-To-Curb Width: 11.9m (39.0ft),  Out-to-Out Width: 12.9m (42.3ft)

Condition: Deck: Satisfactory,  Superstructure: Good,  Substructure: Good,  Channel: Excellent,  Operating Rating: 54.1 metric tons,  Method Used To Determine Operating Rating: Assigned rating based on Load Factor Design (LFD) reported in metric tons,  Inventory Rating: 32.4 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,  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: April 2021,  Deck Structure Type: Concrete Cast-file-Place
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Structure Number: 20 0273R,  Location: 04-SON-101-33.78-HLBG (Lat: 38.597269,  Lng: -122.857217),  Route carried "on" structure: US 101,  Year Built: 1999,  Status: Open,  Structure Length: 23.56m (77.30ft),  Average Daily Traffic: 22,750 (year 2015),  Truck Traffic: 13%,  Average Future Daily Traffic: 43,153 (year 2039),  Design Load: HS 20+Mod,  Features Intersected: RUSSIAN RIVER
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 33.780,  Lanes on structure: 2,  Base Highway Network: Yes (Inventory Route: 1,  Subroute: 1),  Owner: State Highway Agency,  Approaching Roadway Width: 11.9m (39.0ft),  Material/Design: Prestressed concrete continuous,  Design/Construction: Box Beam or Girders - Multiple,  Number Of Spans In Main Unit: 4,  Length of Maximum Span: 66.4m (217.8ft),  Curb-To-Curb Width: 11.9m (39.0ft),  Out-to-Out Width: 12.9m (42.3ft)

Condition: Deck: Satisfactory,  Superstructure: Good,  Substructure: Good,  Channel: Excellent,  Operating Rating: 54.1 metric tons,  Method Used To Determine Operating Rating: Assigned rating based on Load Factor Design (LFD) reported in metric tons,  Inventory Rating: 32.4 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,  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: April 2021,  Deck Structure Type: Concrete Cast-file-Place
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Structure Number: 20C0006,  Location: NORTH OF HEALDSBURG (Lat: 38.658339,  Lng: -122.830003),  Route carried "on" structure: County highway ,  Year Built: 1949,  Status: Open,  Structure Length: 42.18m (138.39ft),  Average Daily Traffic: 3,300 (year 2012),  Truck Traffic: 2%,  Average Future Daily Traffic: 3,955 (year 2043),  Design Load: HS 20,  Features Intersected: RUSSIAN RIVER - JIMTOWN,  Facility Carried by Structure: ALEXANDER VALLEY R
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 0.000,  Lanes on structure: 2,  Owner: County Highway Agency,  Approaching Roadway Width: 7.3m (24.0ft),  Material/Design: Steel continuous,  Design/Construction: Truss - Thru,  Number Of Spans In Main Unit: 5,  Number Of Approach Spans: 30,  Length of Maximum Span: 36.6m (120.1ft),  Curb or Sidewalk Widths: Left: 0.5m (1.6ft),  Right: 0.5m (1.6ft),  Curb-To-Curb Width: 7.3m (24.0ft),  Out-to-Out Width: 8.5m (27.9ft)

Condition: Deck: Fair,  Superstructure: Fair,  Substructure: Good,  Channel: Satisfactory,  Operating Rating: 33.7 metric tons,  Method Used To Determine Operating Rating: Load Factor (LF),  Inventory Rating: 15.6 metric tons,  Method Used To Determine Inventory Rating: Load Factor (LF),  Structural Evaluation: Meets minimum limits,  Deck Geometry: High priority of replacement,  Waterway Adequacy: Better than present minimum criteria,  Approach Roadway Alignment: Better than present minimum criteria,  Length Of Structure Improvement: 42.18m (138.39ft),  Designated Inspection Frequency: Every 24 months,  Critical Feature Inspection Frequency: Every 24 months,  Inspection Date: July 2021,  Critical Feature Inspection Date: October 2021,  Bridge Improvement Cost: $8,245,000,  Roadway Improvement Cost: $1,649,000,  Total Project Cost: $13,852,000 ( Estimate for 2020),  Deck Structure Type: Concrete Cast-file-Place
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Structure Number: 20C0065,  Location: 35.2 MI N MARIN CO LINE (Lat: 38.603878,  Lng: -122.860844),  Route carried "on" structure: City street ,  Year Built: 1921,  Year Reconstructed: 2016,  Status: Open,  Structure Length: 13.31m (43.67ft),  Average Daily Traffic: 8,204 (year 2015),  Truck Traffic: 5%,  Average Future Daily Traffic: 8,495 (year 2038),  Design Load: HS 20,  Features Intersected: RUSSIAN RIVER,  Facility Carried by Structure: HEALDSBURG AVE
Minimum Vertical Clearance: 4.54m (14.90ft),  Kilometerpoint: 0.000,  Lanes on structure: 2,  Owner: City or Municipal Highway Agency,  Approaching Roadway Width: 7.3m (24.0ft),  Material/Design: Steel,  Design/Construction: Truss - Thru,  Number Of Spans In Main Unit: 2,  Number Of Approach Spans: 2,  Length of Maximum Span: 60.4m (198.2ft),  Curb or Sidewalk Widths: Left: 2.4m (7.9ft),  Right: 2.4m (7.9ft),  Curb-To-Curb Width: 6.4m (21.0ft),  Out-to-Out Width: 11.2m (36.7ft)

Condition: Deck: Fair,  Superstructure: Good,  Substructure: Good,  Channel: Very good,  Operating Rating: 54.1 metric tons,  Method Used To Determine Operating Rating: Assigned rating based on Load Factor Design (LFD) reported in metric tons,  Inventory Rating: 32.4 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,  Deck Geometry: High priority of replacement,  Waterway Adequacy: Equal to present desirable criteria,  Approach Roadway Alignment: Equal to present minimum criteria,  Designated Inspection Frequency: Every 24 months,  Critical Feature Inspection Frequency: Every 24 months,  Underwater Inspection Frequency: Every 60 months,  Inspection Date: May 2021,  Critical Feature Inspection Date: October 2021,  Underwater Inspection Date: October 2019,  Deck Structure Type: Concrete Cast-file-Place
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Structure Number: 20C0066,  Location: INT OF BAILACHE AVE (Lat: 38.603375,  Lng: -122.856583),  Route carried "on" structure: City street ,  Year Built: 1987,  Status: Open,  Structure Length: 4.21m (13.81ft),  Average Daily Traffic: 8,204 (year 2010),  Truck Traffic: 3%,  Average Future Daily Traffic: 8,666 (year 2041),  Design Load: HS 20+Mod,  Features Intersected: RUSSIAN RIVER OVERFLOW,  Facility Carried by Structure: HEALDSBURG AVE
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 0.000,  Lanes on structure: 3,  Lanes under structure: 3,  Base Highway Network: Yes,  Owner: City or Municipal Highway Agency,  Approaching Roadway Width: 9.8m (32.2ft),  Skew: 2 degrees,  Material/Design: Concrete continuous,  Design/Construction: Slab,  Number Of Spans In Main Unit: 5,  Length of Maximum Span: 9.1m (29.9ft),  Curb or Sidewalk Widths: Left: 1.5m (4.9ft),  Right: 1.5m (4.9ft),  Curb-To-Curb Width: 14.6m (47.9ft),  Out-to-Out Width: 18.3m (60.0ft)

Condition: Deck: Fair,  Superstructure: Fair,  Substructure: Good,  Operating Rating: 35.0 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: 26.9 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: Somewhat better than minimum adequacy,  Deck Geometry: Somewhat better than minimum adequacy,  Underclear: Meets minimum limits,  Approach Roadway Alignment: Equal to present minimum criteria,  Designated Inspection Frequency: Every 24 months,  Inspection Date: May 2021,  Deck Structure Type: Concrete Cast-file-Place
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Structure Number: 20C0071,  Location: 0.2 MI N FOREMAN LANE (Lat: 38.582264,  Lng: -122.880264),  Route carried "on" structure: County highway ,  Year Built: 1961,  Status: Open,  Structure Length: 3.51m (11.52ft),  Average Daily Traffic: 3,200 (year 2015),  Truck Traffic: 1%,  Average Future Daily Traffic: 3,226 (year 2040),  Design Load: HS 20,  Features Intersected: MILL CREEK,  Facility Carried by Structure: WESTSIDE ROAD
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 0.000,  Lanes on structure: 2,  Owner: County Highway Agency,  Approaching Roadway Width: 11.6m (38.1ft),  Skew: 4 degrees,  Material/Design: Concrete continuous,  Design/Construction: Tee Beam,  Number Of Spans In Main Unit: 3,  Length of Maximum Span: 14.0m (45.9ft),  Curb-To-Curb Width: 12.3m (40.4ft),  Out-to-Out Width: 12.5m (41.0ft)

Condition: Deck: Satisfactory,  Superstructure: Good,  Substructure: Satisfactory,  Channel: Satisfactory,  Operating Rating: 28.2 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: 20.1 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: Somewhat better than minimum adequacy,  Deck Geometry: Equal to present minimum criteria,  Waterway Adequacy: Better than present minimum criteria,  Approach Roadway Alignment: Equal to present desirable criteria,  Designated Inspection Frequency: Every 24 months,  Inspection Date: October 2020,  Deck Structure Type: Concrete Cast-file-Place
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Structure Number: 20C0154,  Location: INTERSECTION LYTTON RD (Lat: 38.648708,  Lng: -122.910233),  Route carried "on" structure: County highway ,  Year Built: 1935,  Status: Open,  Structure Length: 0.67m (2.20ft),  Average Daily Traffic: 2,800 (year 2015),  Truck Traffic: 5%,  Average Future Daily Traffic: 5,291 (year 2040),  Features Intersected: LYTTON SPRINGS CREEK,  Facility Carried by Structure: DRY CRK CANYON RD
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 0.000,  Lanes on structure: 2,  Owner: County Highway Agency,  Approaching Roadway Width: 11.3m (37.1ft),  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: Satisfactory,  Operating Rating: 27.2 metric tons,  Method Used To Determine Operating Rating: Field evaluation and documented engineering judgment,  Inventory Rating: 16.2 metric tons,  Method Used To Determine Inventory Rating: Field evaluation and documented engineering judgment,  Structural Evaluation: Meets minimum limits,  Waterway Adequacy: Somewhat better than minimum adequacy,  Approach Roadway Alignment: Equal to present desirable criteria,  Designated Inspection Frequency: Every 24 months,  Inspection Date: October 2020
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Structure Number: 20C0177,  Location: 1/4 MILE EAST OF SR 101 (Lat: 38.626164,  Lng: -122.875286),  Route carried "on" structure: County highway ,  Year Built: 1962,  Status: Open,  Structure Length: 0.67m (2.20ft),  Average Daily Traffic: 17,950 (year 2015),  Truck Traffic: 10%,  Average Future Daily Traffic: 20,550 (year 2038),  Features Intersected: FOSS CREEK,  Facility Carried by Structure: DRY CREEK RD
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 0.000,  Lanes on structure: 4,  Base Highway Network: Yes,  Owner: City or Municipal Highway Agency,  Approaching Roadway Width: 12.5m (41.0ft),  Material/Design: Concrete continuous,  Design/Construction: Culvert,  Number Of Spans In Main Unit: 2,  Length of Maximum Span: 3.1m (10.2ft),  Curb or Sidewalk Widths: Left: 0.2m (0.7ft),  Right: 2.2m (7.2ft),  Curb-To-Curb Width: 20.7m (67.9ft),  Out-to-Out Width: 22.7m (74.5ft)

Condition: Channel: Fair,  Culverts: Good,  Operating Rating: 40.5 metric tons,  Method Used To Determine Operating Rating: Field evaluation and documented engineering judgment,  Inventory Rating: 24.3 metric tons,  Method Used To Determine Inventory Rating: Field evaluation and documented engineering judgment,  Structural Evaluation: Equal to present minimum criteria,  Deck Geometry: Superior to present desirable criteria,  Waterway Adequacy: Better than present minimum criteria,  Approach Roadway Alignment: Equal to present desirable criteria,  Designated Inspection Frequency: Every 24 months,  Inspection Date: May 2021,  Deck Structure Type: Concrete Cast-file-Place,  Wearing Surface/Protective System: Wearing Surface: Bituminous
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Structure Number: 20C0248,  Location: 0.4 MI W OF DRY CREEK RD (Lat: 38.654019,  Lng: -122.927700),  Route carried "on" structure: County highway ,  Year Built: 1915,  Status: Open,  Structure Length: 5.74m (18.83ft),  Average Daily Traffic: 838 (year 2008),  Truck Traffic: 1%,  Average Future Daily Traffic: 1,301 (year 2043),  Features Intersected: DRY CREEK,  Facility Carried by Structure: LAMBERT BRIDGE RD
Minimum Vertical Clearance: 3.98m (13.06ft),  Kilometerpoint: 0.000,  Lanes on structure: 1,  Owner: County Highway Agency,  Approaching Roadway Width: 5.8m (19.0ft),  Material/Design: Steel,  Design/Construction: Truss - Thru,  Number Of Spans In Main Unit: 1,  Length of Maximum Span: 56.5m (185.4ft),  Curb-To-Curb Width: 5.0m (16.4ft),  Out-to-Out Width: 5.2m (17.1ft)

Condition: Deck: Fair,  Superstructure: Fair,  Substructure: Fair,  Channel: Good,  Operating Rating: 30.5 metric tons,  Method Used To Determine Operating Rating: Load Factor (LF),  Inventory Rating: 18.1 metric tons,  Method Used To Determine Inventory Rating: Load Factor (LF),  Structural Evaluation: Somewhat better than minimum adequacy,  Deck Geometry: High priority of replacement,  Waterway Adequacy: Better than present minimum criteria,  Approach Roadway Alignment: High priority of corrective action,  Designated Inspection Frequency: Every 24 months,  Critical Feature Inspection Frequency: Every 24 months,  Inspection Date: July 2021,  Critical Feature Inspection Date: May 2021,  Deck Structure Type: Concrete Cast-file-Place
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Structure Number: 20C025,  Location: NEAR SKIMMER RD (Lat: 38.591258,  Lng: -122.865753),  Route carried "on" structure: County highway ,  Year Built: 1979,  Status: Open,  Structure Length: 3.47m (11.38ft),  Average Daily Traffic: 100 (year 2015),  Average Future Daily Traffic: 183 (year 2040),  Design Load: HS 20,  Features Intersected: WEST SLOUGH,  Facility Carried by Structure: MAGNOLIA DR
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 0.000,  Lanes on structure: 2,  Owner: County Highway Agency,  Approaching Roadway Width: 3.7m (12.1ft),  Skew: 1 degrees,  Material/Design: Concrete continuous,  Design/Construction: Slab,  Number Of Spans In Main Unit: 4,  Length of Maximum Span: 9.8m (32.2ft),  Curb-To-Curb Width: 8.5m (27.9ft),  Out-to-Out Width: 8.7m (28.5ft)

Condition: Deck: Good,  Superstructure: Good,  Substructure: Good,  Channel: Good,  Operating Rating: 50.5 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: 39.2 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,  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: May 2019,  Deck Structure Type: Concrete Cast-file-Place
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Structure Number: 20C0341,  Location: 0.2 MI N OF US HWY 101 (Lat: 38.508986,  Lng: -122.769847),  Route carried "on" structure: County highway ,  Year Built: 1971,  Status: Open,  Structure Length: 4.82m (15.81ft),  Average Daily Traffic: 14,650 (year 2015),  Truck Traffic: 4%,  Average Future Daily Traffic: 26,630 (year 2040),  Features Intersected: MARK WEST CREEK,  Facility Carried by Structure: FULTON RD
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 0.000,  Lanes on structure: 2,  Owner: County Highway Agency,  Approaching Roadway Width: 11.6m (38.1ft),  Material/Design: Concrete continuous,  Design/Construction: Box Beam or Girders - Multiple,  Number Of Spans In Main Unit: 3,  Length of Maximum Span: 18.9m (62.0ft),  Curb-To-Curb Width: 12.2m (40.0ft),  Out-to-Out Width: 12.4m (40.7ft)

Condition: Deck: Fair,  Superstructure: Fair,  Substructure: Good,  Channel: Good,  Operating Rating: 28.2 metric tons,  Method Used To Determine Operating Rating: Field evaluation and documented engineering judgment,  Inventory Rating: 16.8 metric tons,  Method Used To Determine Inventory Rating: Field evaluation and documented engineering judgment,  Structural Evaluation: Meets minimum limits,  Deck Geometry: Somewhat better than minimum adequacy,  Waterway Adequacy: Equal to present desirable criteria,  Approach Roadway Alignment: Equal to present desirable criteria,  Designated Inspection Frequency: Every 24 months,  Inspection Date: June 2021,  Deck Structure Type: Concrete Cast-file-Place
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Structure Number: 20C0343,  Location: IN HEALDSBURG (Lat: 38.615814,  Lng: -122.876647),  Route carried "on" structure: City street ,  Year Built: 1920,  Status: Open,  Structure Length: 1.13m (3.71ft),  Average Daily Traffic: 1,830 (year 2015),  Truck Traffic: 1%,  Average Future Daily Traffic: 4,101 (year 2041),  Features Intersected: FOSS CREEK,  Facility Carried by Structure: GRANT ST
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 0.000,  Lanes on structure: 2,  Owner: City or Municipal Highway Agency,  Approaching Roadway Width: 6.8m (22.3ft),  Skew: 3 degrees,  Material/Design: Concrete continuous,  Design/Construction: Tee Beam,  Number Of Spans In Main Unit: 2,  Length of Maximum Span: 5.8m (19.0ft),  Curb-To-Curb Width: 6.8m (22.3ft),  Out-to-Out Width: 6.8m (22.3ft)

Condition: Deck: Good,  Superstructure: Good,  Substructure: Fair,  Channel: Good,  Operating Rating: 28.2 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: 19.8 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: 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,  Designated Inspection Frequency: Every 24 months,  Inspection Date: May 2021,  Deck Structure Type: Concrete Cast-file-Place,  Wearing Surface/Protective System: Wearing Surface: Bituminous
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Structure Number: 20C0349,  Location: 1.9 MI W OF WESTSIDE RD (Lat: 38.594467,  Lng: -122.916319),  Route carried "on" structure: County highway ,  Year Built: 1966,  Status: Open,  Structure Length: 2.10m (6.89ft),  Average Daily Traffic: 210 (year 2015),  Truck Traffic: 1%,  Average Future Daily Traffic: 661 (year 2040),  Design Load: HS 20,  Features Intersected: MILL CREEK,  Facility Carried by Structure: MILL CREEK RD
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 0.000,  Lanes on structure: 2,  Owner: County Highway Agency,  Approaching Roadway Width: 7.9m (25.9ft),  Skew: 2 degrees,  Material/Design: Concrete continuous,  Design/Construction: Slab,  Number Of Spans In Main Unit: 3,  Length of Maximum Span: 7.9m (25.9ft),  Curb-To-Curb Width: 9.8m (32.2ft),  Out-to-Out Width: 10.0m (32.8ft)

Condition: Deck: Satisfactory,  Superstructure: Satisfactory,  Substructure: Good,  Channel: Good,  Operating Rating: 54.8 metric tons,  Method Used To Determine Operating Rating: Load Factor (LF),  Inventory Rating: 33.0 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: Equal to present desirable criteria,  Designated Inspection Frequency: Every 24 months,  Inspection Date: May 2021,  Deck Structure Type: Concrete Cast-file-Place
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Structure Number: 20C035,  Location: 0.5 MI W MILL CREEK RD (Lat: 38.599253,  Lng: -122.920919),  Route carried "on" structure: County highway ,  Year Built: 1974,  Status: Open,  Structure Length: 1.58m (5.18ft),  Average Daily Traffic: 130 (year 2015),  Truck Traffic: 1%,  Average Future Daily Traffic: 315 (year 2040),  Features Intersected: WALLACE CREEK,  Facility Carried by Structure: WALLACE CREEK RD
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 0.000,  Lanes on structure: 1,  Owner: County Highway Agency,  Approaching Roadway Width: 4.6m (15.1ft),  Skew: 4 degrees,  Material/Design: Steel,  Design/Construction: Stringer/Multi-beam,  Number Of Spans In Main Unit: 3,  Length of Maximum Span: 6.1m (20.0ft),  Curb-To-Curb Width: 4.1m (13.5ft),  Out-to-Out Width: 4.3m (14.1ft)

Condition: Deck: Good,  Superstructure: Fair,  Substructure: Fair,  Channel: Good,  Operating Rating: 63.5 metric tons,  Method Used To Determine Operating Rating: Load Factor (LF),  Inventory Rating: 37.9 metric tons,  Method Used To Determine Inventory Rating: Load Factor (LF),  Structural Evaluation: Somewhat better than minimum adequacy,  Deck Geometry: High priority of replacement,  Waterway Adequacy: Better than present minimum criteria,  Approach Roadway Alignment: Equal to present desirable criteria,  Designated Inspection Frequency: Every 24 months,  Critical Feature Inspection Frequency: Every 24 months,  Inspection Date: May 2021,  Critical Feature Inspection Date: May 2021,  Deck Structure Type: Corrugated Steel,  Wearing Surface/Protective System: Wearing Surface: Bituminous
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Structure Number: 20C0351,  Location: 0.3 MI W OF WESTSIDE RD (Lat: 38.580294,  Lng: -122.884167),  Route carried "on" structure: County highway ,  Year Built: 1975,  Status: Open,  Structure Length: 0.88m (2.89ft),  Average Daily Traffic: 50 (year 2015),  Average Future Daily Traffic: 54 (year 2038),  Design Load: HS 20,  Features Intersected: FELTA CREEK,  Facility Carried by Structure: FELTA RD
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 0.000,  Lanes on structure: 2,  Owner: County Highway Agency,  Approaching Roadway Width: 4.9m (16.1ft),  Skew: 4 degrees,  Material/Design: Steel,  Design/Construction: Stringer/Multi-beam,  Number Of Spans In Main Unit: 1,  Length of Maximum Span: 8.5m (27.9ft),  Curb-To-Curb Width: 8.0m (26.2ft),  Out-to-Out Width: 8.2m (26.9ft)

Condition: Deck: Good,  Superstructure: Fair,  Substructure: Fair,  Channel: Good,  Operating Rating: 59.6 metric tons,  Method Used To Determine Operating Rating: Load Factor (LF),  Inventory Rating: 35.6 metric tons,  Method Used To Determine Inventory Rating: Load Factor (LF),  Structural Evaluation: Somewhat better than minimum adequacy,  Deck Geometry: Equal to present minimum criteria,  Waterway Adequacy: Better than present minimum criteria,  Approach Roadway Alignment: Equal to present desirable criteria,  Designated Inspection Frequency: Every 24 months,  Critical Feature Inspection Frequency: Every 24 months,  Inspection Date: October 2020,  Critical Feature Inspection Date: October 2020,  Deck Structure Type: Concrete Cast-file-Place
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Structure Number: 20C0408,  Location: 5.38 MI NW WESTSIDE RD (Lat: 38.656422,  Lng: -122.938283),  Route carried "on" structure: County highway ,  Year Built: 1928,  Year Reconstructed: 1960,  Status: Open,  Structure Length: 0.83m (2.72ft),  Average Daily Traffic: 200 (year 2010),  Truck Traffic: 1%,  Average Future Daily Traffic: 287 (year 2043),  Features Intersected: GRAPE CREEK,  Facility Carried by Structure: WEST DRY CREEK RD
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 0.000,  Lanes on structure: 2,  Owner: County Highway Agency,  Approaching Roadway Width: 4.9m (16.1ft),  Skew: 2 degrees,  Material/Design: Concrete,  Design/Construction: Tee Beam,  Number Of Spans In Main Unit: 1,  Length of Maximum Span: 7.3m (24.0ft),  Curb-To-Curb Width: 8.7m (28.5ft),  Out-to-Out Width: 8.9m (29.2ft)

Condition: Deck: Good,  Superstructure: Good,  Substructure: Good,  Channel: Fair,  Operating Rating: 28.8 metric tons,  Method Used To Determine Operating Rating: Field evaluation and documented engineering judgment,  Inventory Rating: 17.2 metric tons,  Method Used To Determine Inventory Rating: Field evaluation and documented engineering judgment,  Structural Evaluation: Somewhat better than minimum adequacy,  Deck Geometry: Equal to 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: July 2021,  Deck Structure Type: Concrete Cast-file-Place,  Wearing Surface/Protective System: Wearing Surface: Bituminous
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Structure Number: 20C0409,  Location: 4.3 MI NW WESTSIDE ROAD (Lat: 38.647375,  Lng: -122.929797),  Route carried "on" structure: County highway ,  Year Built: 1928,  Year Reconstructed: 1960,  Status: Open,  Structure Length: 0.71m (2.33ft),  Average Daily Traffic: 200 (year 2010),  Truck Traffic: 1%,  Average Future Daily Traffic: 287 (year 2043),  Features Intersected: CRANE CREEK,  Facility Carried by Structure: WEST DRY CREEK RD
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 0.000,  Lanes on structure: 2,  Owner: County Highway Agency,  Approaching Roadway Width: 5.5m (18.0ft),  Skew: 2 degrees,  Material/Design: Concrete,  Design/Construction: Tee Beam,  Number Of Spans In Main Unit: 1,  Length of Maximum Span: 6.2m (20.3ft),  Curb-To-Curb Width: 7.7m (25.3ft),  Out-to-Out Width: 8.3m (27.2ft)

Condition: Deck: Good,  Superstructure: Good,  Substructure: Good,  Channel: Good,  Operating Rating: 28.2 metric tons,  Method Used To Determine Operating Rating: Field evaluation and documented engineering judgment,  Inventory Rating: 16.8 metric tons,  Method Used To Determine Inventory Rating: Field evaluation and documented engineering judgment,  Structural Evaluation: Somewhat better than minimum adequacy,  Deck Geometry: Somewhat better than minimum adequacy,  Waterway Adequacy: Better than present minimum criteria,  Approach Roadway Alignment: Somewhat better than minimum adequacy,  Designated Inspection Frequency: Every 24 months,  Inspection Date: July 2021,  Deck Structure Type: Concrete Cast-file-Place,  Wearing Surface/Protective System: Wearing Surface: Bituminous
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Structure Number: 20C041,  Location: 1.35 MI NW WESTSIDE RD (Lat: 38.620611,  Lng: -122.893931),  Route carried "on" structure: County highway ,  Year Built: 1928,  Year Reconstructed: 1976,  Status: Open,  Structure Length: 0.67m (2.20ft),  Average Daily Traffic: 750 (year 2015),  Truck Traffic: 1%,  Average Future Daily Traffic: 2,664 (year 2040),  Features Intersected: PINE RIDGE CANYON,  Facility Carried by Structure: W DRY CREEK ROAD
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 0.000,  Lanes on structure: 2,  Owner: County Highway Agency,  Approaching Roadway Width: 6.1m (20.0ft),  Skew: 2 degrees,  Material/Design: Concrete,  Design/Construction: Tee Beam,  Number Of Spans In Main Unit: 1,  Length of Maximum Span: 6.4m (21.0ft),  Curb-To-Curb Width: 9.1m (29.9ft),  Out-to-Out Width: 9.3m (30.5ft)

Condition: Deck: Good,  Superstructure: Good,  Substructure: Good,  Channel: Good,  Operating Rating: 28.2 metric tons,  Method Used To Determine Operating Rating: Field evaluation and documented engineering judgment,  Inventory Rating: 16.8 metric tons,  Method Used To Determine Inventory Rating: Field evaluation and documented engineering judgment,  Structural Evaluation: Meets minimum limits,  Deck Geometry: Equal to present minimum criteria,  Waterway Adequacy: Better than present minimum criteria,  Approach Roadway Alignment: Equal to present desirable criteria,  Designated Inspection Frequency: Every 24 months,  Inspection Date: May 2021,  Deck Structure Type: Concrete Cast-file-Place,  Wearing Surface/Protective System: Wearing Surface: Bituminous
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Structure Number: 20C0413,  Location: 0.63 MI NE OF SR 128 (Lat: 38.677850,  Lng: -122.805322),  Route carried "on" structure: County highway ,  Year Built: 1974,  Status: Open,  Structure Length: 3.14m (10.30ft),  Average Daily Traffic: 100 (year 2011),  Truck Traffic: 1%,  Average Future Daily Traffic: 161 (year 2041),  Design Load: HS 20,  Features Intersected: SAUSAL CREEK,  Facility Carried by Structure: PINE FLAT RD
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 0.000,  Lanes on structure: 2,  Owner: County Highway Agency,  Approaching Roadway Width: 9.8m (32.2ft),  Skew: 4 degrees,  Material/Design: Concrete continuous,  Design/Construction: Slab,  Number Of Spans In Main Unit: 3,  Length of Maximum Span: 12.2m (40.0ft),  Curb-To-Curb Width: 9.8m (32.2ft),  Out-to-Out Width: 10.0m (32.8ft)

Condition: Deck: Fair,  Superstructure: Fair,  Substructure: Poor,  Channel: Good,  Operating Rating: 89.7 metric tons,  Method Used To Determine Operating Rating: Load Factor (LF),  Inventory Rating: 53.8 metric tons,  Method Used To Determine Inventory Rating: Load Factor (LF),  Structural Evaluation: Meets minimum limits,  Deck Geometry: Equal to present desirable criteria,  Waterway Adequacy: Better than present minimum criteria,  Approach Roadway Alignment: Equal to present minimum criteria,  Length Of Structure Improvement: 3.14m (10.30ft),  Designated Inspection Frequency: Every 24 months,  Inspection Date: July 2021,  Bridge Improvement Cost: $314,000,  Roadway Improvement Cost: $62,000,  Total Project Cost: $527,000 ( Estimate for 2020),  Deck Structure Type: Concrete Cast-file-Place
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Structure Number: 20C0415,  Location: 1 MI SE ALEXANDER VALY RD (Lat: 38.651103,  Lng: -122.815814),  Route carried "on" structure: County highway ,  Year Built: 1968,  Status: Open,  Structure Length: 1.80m (5.91ft),  Average Daily Traffic: 100 (year 2015),  Truck Traffic: 1%,  Average Future Daily Traffic: 126 (year 2040),  Features Intersected: HILLSIDE,  Facility Carried by Structure: W SODA ROCK LANE
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 0.000,  Lanes on structure: 2,  Owner: County Highway Agency,  Approaching Roadway Width: 4.9m (16.1ft),  Material/Design: Steel,  Design/Construction: Stringer/Multi-beam,  Number Of Spans In Main Unit: 3,  Length of Maximum Span: 5.8m (19.0ft),  Curb-To-Curb Width: 8.5m (27.9ft),  Out-to-Out Width: 2.8m (9.2ft)

Condition: Deck: Good,  Superstructure: Fair,  Substructure: Fair,  Operating Rating: 47.6 metric tons,  Method Used To Determine Operating Rating: Load Factor (LF),  Inventory Rating: 28.5 metric tons,  Method Used To Determine Inventory Rating: Load Factor (LF),  Structural Evaluation: Somewhat better than minimum adequacy,  Deck Geometry: Better than present minimum criteria,  Approach Roadway Alignment: Equal to present desirable criteria,  Designated Inspection Frequency: Every 24 months,  Critical Feature Inspection Frequency: Every 24 months,  Inspection Date: May 2021,  Critical Feature Inspection Date: May 2021,  Deck Structure Type: Corrugated Steel,  Wearing Surface/Protective System: Wearing Surface: Bituminous
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Structure Number: 20C0417,  Location: 1.6 MI E JCT HEALDSBG AVE (Lat: 38.624100,  Lng: -122.847925),  Route carried "on" structure: County highway ,  Year Built: 1970,  Status: Open,  Structure Length: 3.05m (10.01ft),  Average Daily Traffic: 525 (year 2015),  Truck Traffic: 1%,  Average Future Daily Traffic: 650 (year 2040),  Design Load: HS 20,  Features Intersected: HILLSIDE,  Facility Carried by Structure: FITCH MOUNTAIN RD
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 0.000,  Lanes on structure: 2,  Owner: County Highway Agency,  Approaching Roadway Width: 5.2m (17.1ft),  Material/Design: Steel,  Design/Construction: Stringer/Multi-beam,  Number Of Spans In Main Unit: 5,  Length of Maximum Span: 6.2m (20.3ft),  Curb-To-Curb Width: 7.3m (24.0ft),  Out-to-Out Width: 2.7m (8.9ft)

Condition: Deck: Good,  Superstructure: Fair,  Substructure: Fair,  Operating Rating: 36.6 metric tons,  Method Used To Determine Operating Rating: Load Factor (LF),  Inventory Rating: 22.0 metric tons,  Method Used To Determine Inventory Rating: Load Factor (LF),  Structural Evaluation: Somewhat better than minimum adequacy,  Deck Geometry: Meets minimum limits,  Approach Roadway Alignment: Equal to present desirable criteria,  Designated Inspection Frequency: Every 24 months,  Critical Feature Inspection Frequency: Every 24 months,  Inspection Date: May 2021,  Critical Feature Inspection Date: May 2021,  Deck Structure Type: Corrugated Steel,  Wearing Surface/Protective System: Wearing Surface: Bituminous
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Structure Number: 20C0418,  Location: 1.5 MI E JCT UNV ST HELDG (Lat: 38.613700,  Lng: -122.837539),  Route carried "on" structure: County highway ,  Year Built: 1955,  Year Reconstructed: 2012,  Status: Posted for load,  Structure Length: 9.69m (31.79ft),  Average Daily Traffic: 525 (year 2015),  Truck Traffic: 1%,  Average Future Daily Traffic: 650 (year 2040),  Features Intersected: HILLSIDE,  Facility Carried by Structure: FITCH MOUNTAIN RD
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 0.000,  Lanes on structure: 2,  Owner: County Highway Agency,  Approaching Roadway Width: 4.9m (16.1ft),  Material/Design: Steel,  Design/Construction: Stringer/Multi-beam,  Number Of Spans In Main Unit: 17,  Length of Maximum Span: 5.9m (19.4ft),  Curb-To-Curb Width: 5.8m (19.0ft),  Out-to-Out Width: 7.3m (24.0ft)

Condition: Deck: Good,  Superstructure: Fair,  Substructure: Fair,  Operating Rating: 50.9 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: Somewhat better than minimum adequacy,  Deck Geometry: High priority of replacement,  Approach Roadway Alignment: Equal to present desirable criteria,  Designated Inspection Frequency: Every 24 months,  Critical Feature Inspection Frequency: Every 24 months,  Inspection Date: May 2021,  Critical Feature Inspection Date: May 2021,  Deck Structure Type: Corrugated Steel,  Wearing Surface/Protective System: Wearing Surface: Bituminous
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Structure Number: 20C0518,  Location: 1.3 MI E JCT UNV ST HELDG (Lat: 38.613589,  Lng: -122.838022),  Route carried "on" structure: County highway ,  Year Built: 1999,  Status: Open,  Structure Length: 2.31m (7.58ft),  Average Daily Traffic: 400 (year 2015),  Truck Traffic: 1%,  Average Future Daily Traffic: 918 (year 2038),  Design Load: HS 20+Mod,  Features Intersected: HILLSIDE,  Facility Carried by Structure: FITCH MOUNTAIN RD
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 0.000,  Lanes on structure: 2,  Owner: County Highway Agency,  Approaching Roadway Width: 6.5m (21.3ft),  Material/Design: Steel,  Design/Construction: Stringer/Multi-beam,  Number Of Spans In Main Unit: 3,  Length of Maximum Span: 7.7m (25.3ft),  Curb-To-Curb Width: 8.1m (26.6ft),  Out-to-Out Width: 4.9m (16.1ft)

Condition: Deck: Good,  Superstructure: Fair,  Substructure: Fair,  Operating Rating: 49.6 metric tons,  Method Used To Determine Operating Rating: Load Factor (LF),  Inventory Rating: 29.8 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,  Approach Roadway Alignment: Equal to present desirable criteria,  Designated Inspection Frequency: Every 24 months,  Critical Feature Inspection Frequency: Every 24 months,  Inspection Date: October 2020,  Critical Feature Inspection Date: October 2020,  Deck Structure Type: Concrete Cast-file-Place
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Structure Number: 20C0525,  Location: 2 MI NE OF HEALDSBURG AVE (Lat: 38.612661,  Lng: -122.832761),  Route carried "on" structure: County highway ,  Year Built: 1985,  Status: Open,  Structure Length: 1.80m (5.91ft),  Average Daily Traffic: 700 (year 2015),  Truck Traffic: 5%,  Average Future Daily Traffic: 1,278 (year 2038),  Features Intersected: HILLSIDE,  Facility Carried by Structure: BAILHACHE ROAD
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 0.000,  Lanes on structure: 2,  Owner: County Highway Agency,  Approaching Roadway Width: 7.2m (23.6ft),  Material/Design: Steel,  Design/Construction: Stringer/Multi-beam,  Number Of Spans In Main Unit: 3,  Length of Maximum Span: 5.9m (19.4ft),  Curb-To-Curb Width: 7.2m (23.6ft),  Out-to-Out Width: 4.6m (15.1ft)

Condition: Deck: Good,  Superstructure: Fair,  Substructure: Fair,  Operating Rating: 69.7 metric tons,  Method Used To Determine Operating Rating: Load Factor (LF),  Inventory Rating: 41.8 metric tons,  Method Used To Determine Inventory Rating: Load Factor (LF),  Structural Evaluation: Somewhat better than minimum adequacy,  Deck Geometry: Meets minimum limits,  Approach Roadway Alignment: Equal to present desirable criteria,  Designated Inspection Frequency: Every 24 months,  Critical Feature Inspection Frequency: Every 24 months,  Inspection Date: October 2020,  Critical Feature Inspection Date: October 2020,  Deck Structure Type: Corrugated Steel,  Wearing Surface/Protective System: Wearing Surface: Bituminous
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Structure Number: 20 0066,  Location: 04-SON-101-32.79 (Lat: 38.587469,  Lng: -122.844225),  Route carried "under" structure: US 101,  Year Built: 1962,  Structure Length: 0. m,  Average Daily Traffic: 45,500 (year 2019),  Truck Traffic: 15%,  Features Intersected: US HIGHWAY 101,  Facility Carried by Structure: LIMERICK LANE
Minimum Vertical Clearance: 4.65m (15.26ft),  Kilometerpoint: 32.790,  Lanes on structure: 2,  Lanes under structure: 4,  Material/Design: Concrete continuous,  Design/Construction: Box Beam or Girders - Multiple,  Length of Maximum Span: 27.4m (89.9ft)

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Structure Number: 20 0067L,  Location: 04-SON-101-33.48 (Lat: 38.594578,  Lng: -122.852481),  Route carried "under" structure: County highway ,  Year Built: 1962,  Structure Length: 0. m,  Average Daily Traffic: 1,050 (year 2019),  Truck Traffic: 1%,  Features Intersected: HEALDSBURG AVENUE,  Facility Carried by Structure: US HIGHWAY 101 SB
Minimum Vertical Clearance: 5.59m (18.34ft),  Kilometerpoint: 0.000,  Lanes on structure: 2,  Lanes under structure: 4,  Material/Design: Prestressed concrete,  Design/Construction: Stringer/Multi-beam,  Length of Maximum Span: 23.2m (76.1ft)

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Structure Number: 20 0067R,  Location: 04-SON-101-33.48 (Lat: 38.594894,  Lng: -122.852633),  Route carried "under" structure: City street ,  Year Built: 1962,  Structure Length: 0. m,  Average Daily Traffic: 1,000 (year 2017),  Truck Traffic: 1%,  Features Intersected: HEALDSBURG AVENUE,  Facility Carried by Structure: US HIGHWAY 101 NB
Minimum Vertical Clearance: 4.83m (15.85ft),  Kilometerpoint: 0.000,  Lanes on structure: 2,  Lanes under structure: 4,  Material/Design: Prestressed concrete,  Design/Construction: Stringer/Multi-beam,  Length of Maximum Span: 23.2m (76.1ft)

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Structure Number: 20 0085L,  Location: 04-SON-101-34.55-HLBG (Lat: 38.603906,  Lng: -122.868433),  Route carried "under" structure: Ramp US 101,  Year Built: 1960,  Structure Length: 0. m,  Average Daily Traffic: 13,900 (year 2013),  Truck Traffic: 13%,  Features Intersected: HEALDSBURG AV-S101 ON-RP
Minimum Vertical Clearance: 4.54m (14.90ft),  Kilometerpoint: 34.550,  Lanes on structure: 2,  Lanes under structure: 1,  Material/Design: Concrete continuous,  Design/Construction: Tee Beam,  Length of Maximum Span: 16.5m (54.1ft)

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Structure Number: 20 0085R,  Location: 04-SON-101-34.55-HLBG (Lat: 38.604144,  Lng: -122.868381),  Route carried "under" structure: Ramp US 101,  Year Built: 1960,  Structure Length: 0. m,  Average Daily Traffic: 16,000 (year 2017),  Truck Traffic: 13%,  Features Intersected: HEALDSBURG AV-S101 ON-RP
Minimum Vertical Clearance: 4.80m (15.75ft),  Kilometerpoint: 34.550,  Lanes on structure: 2,  Lanes under structure: 4,  Material/Design: Concrete continuous,  Design/Construction: Tee Beam,  Length of Maximum Span: 16.5m (54.1ft)

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