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Bridge Statistics for Potomac, Maryland (MD)
Condition, Traffic, Stress, Structural Evaluation, Project Costs


  • National Bridge Inventory (NBI) Statistics
  • 16Number of bridges
  • 71m233ftTotal length
  • $14,854,000Total costs
  • 329,181Total average daily traffic
  • 22,685Total average daily truck traffic
  • 375,932Total future (year 2026) average daily traffic
  • National Bridge Inventory (NBI) Registered Bridges for Potomac
  • No street view available for this location

New bridges - Historical Statistics

  • 21930-1939
  • 11940-1949
  • 11950-1959
  • 51960-1969
  • 11970-1979
  • 51980-1989
  • 12000-2009

Reconstructed bridges - Historical Statistics

  • 31980-1989
  • 21990-1999

Average Daily Traffic

Average Truck Traffic (%)

Bridge Condition - Deck

Bridge Condition - Superstructure

Bridge Condition - Substructure

Bridge Condition - Channel

Bridge Condition - Culverts

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Structure Number: 10000015010001,  Location: ON VIRGINIA LINE (Lat: 38.971125,  Lng: -77.179431),  Route carried "on" structure: Interstate 495,  Year Built: 1963,  Year Reconstructed: 1986,  Status: Open,  Structure Length: 43.98m (144.29ft),  Average Daily Traffic: 214,005 (year 2009),  Truck Traffic: 8%,  Average Future Daily Traffic: 244,752 (year 2026),  Design Load: HS 20,  Features Intersected: POTOMAC RIVER
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 0.097,  Lanes on structure: 10,  Base Highway Network: Yes,  Owner: State Highway Agency,  Approaching Roadway Width: 43.3m (142.1ft),  Skew: 30 degrees,  Material/Design: Steel continuous,  Design/Construction: Girder and Floorbeam System,  Number Of Spans In Main Unit: 6,  Number Of Approach Spans: 2,  Length of Maximum Span: 85.3m (279.9ft),  Curb-To-Curb Width: 40.9m (134.2ft),  Out-to-Out Width: 41.9m (137.5ft)

Condition: Deck: Satisfactory,  Superstructure: Fair,  Substructure: Fair,  Channel: Satisfactory,  Operating Rating: 57.1 metric tons,  Method Used To Determine Operating Rating: Load Factor (LF),  Inventory Rating: 33.6 metric tons,  Method Used To Determine Inventory Rating: Load Factor (LF),  Structural Evaluation: Somewhat better than minimum adequacy,  Deck Geometry: Meets minimum limits,  Waterway Adequacy: Superior to present desirable criteria,  Approach Roadway Alignment: Equal to present desirable criteria,  Length Of Structure Improvement: 43.98m (144.29ft),  Designated Inspection Frequency: Every 24 months,  Underwater Inspection Frequency: Every 48 months,  Inspection Date: August 13,  Underwater Inspection Date: September 12,  Bridge Improvement Cost: $11,905,000,  Roadway Improvement Cost: $1,190,000,  Total Project Cost: $13,096,000,  Deck Structure Type: Concrete Cast-file-Place,  Wearing Surface/Protective System: Wearing Surface: Monolithic Concrete,  Deck Protection: Epoxy Coated Reinforcing
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Structure Number: 200000M-001201,  Location: 1 MI SOUTH OF MD 189 (Lat: 39.003728,  Lng: -77.214275),  Route carried "on" structure: County highway 189,  Year Built: 1989,  Status: Open,  Structure Length: 1.46m (4.79ft),  Average Daily Traffic: 3,625 (year 2011),  Truck Traffic: 5%,  Average Future Daily Traffic: 5,000 (year 2031),  Design Load: HS 20,  Features Intersected: ROCK RUN,  Facility Carried by Structure: OAKLYN DRIVE
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 0.000,  Lanes on structure: 2,  Owner: County Highway Agency,  Approaching Roadway Width: 13.4m (44.0ft),  Skew: 3 degrees,  Material/Design: Concrete continuous,  Design/Construction: Slab,  Number Of Spans In Main Unit: 2,  Length of Maximum Span: 7.0m (23.0ft),  Curb-To-Curb Width: 13.4m (44.0ft),  Out-to-Out Width: 14.4m (47.2ft)

Condition: Deck: Good,  Superstructure: Good,  Substructure: Satisfactory,  Channel: Satisfactory,  Operating Rating: 83.0 metric tons,  Method Used To Determine Operating Rating: Load Factor (LF),  Inventory Rating: 49.4 metric tons,  Method Used To Determine Inventory Rating: Load Factor (LF),  Structural Evaluation: Equal to present minimum criteria,  Deck Geometry: Better than present minimum criteria,  Waterway Adequacy: Equal to present minimum criteria,  Approach Roadway Alignment: Equal to present desirable criteria,  Designated Inspection Frequency: Every 24 months,  Inspection Date: May 13,  Deck Structure Type: Concrete Cast-file-Place,  Wearing Surface/Protective System: Wearing Surface: Integral Concrete,  Membrane: Epoxy,  Deck Protection: Epoxy Coated Reinforcing
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Structure Number: 200000M-001301,  Location: 1.5 MI WEST OF MD 189 (Lat: 39.045986,  Lng: -77.217058),  Route carried "on" structure: County highway 195,  Year Built: 1942,  Year Reconstructed: 1992,  Status: Posted for load,  Structure Length: 0.85m (2.79ft),  Average Daily Traffic: 5,990 (year 2011),  Truck Traffic: 3%,  Average Future Daily Traffic: 6,800 (year 2031),  Design Load: H 15,  Features Intersected: KILGOUR BRANCH,  Facility Carried by Structure: GLEN ROAD
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 2.784,  Lanes on structure: 2,  Owner: County Highway Agency,  Approaching Roadway Width: 5.8m (19.0ft),  Material/Design: Steel,  Design/Construction: Stringer/Multi-beam,  Number Of Spans In Main Unit: 1,  Length of Maximum Span: 8.2m (26.9ft),  Curb-To-Curb Width: 5.9m (19.4ft),  Out-to-Out Width: 6.1m (20.0ft)

Condition: Deck: Satisfactory,  Superstructure: Satisfactory,  Substructure: Fair,  Channel: Satisfactory,  Operating Rating: 32.7 metric tons,  Method Used To Determine Operating Rating: Load Factor (LF),  Inventory Rating: 19.5 metric tons,  Method Used To Determine Inventory Rating: Load Factor (LF),  Structural Evaluation: Meets minimum limits,  Deck Geometry: High priority of replacement,  Waterway Adequacy: Equal to present minimum criteria,  Approach Roadway Alignment: Equal to present minimum criteria,  Bridge Posting: Required (Relationship of Operating Rating to Maximum Legal Load: 30.0 - 39.9% below),  Length Of Structure Improvement: 1.59m (5.22ft),  Designated Inspection Frequency: Every 12 months,  Inspection Date: January 14,  Bridge Improvement Cost: $202,000,  Roadway Improvement Cost: $20,000,  Total Project Cost: $303,000,  Deck Structure Type: Corrugated Steel,  Wearing Surface/Protective System: Wearing Surface: Bituminous
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Structure Number: 200000M-001401,  Location: 1.5 MI W OF JCT SR 189 (Lat: 39.046150,  Lng: -77.217678),  Route carried "on" structure: County highway 195,  Year Built: 1930,  Year Reconstructed: 1998,  Status: Open,  Structure Length: 1.22m (4.00ft),  Average Daily Traffic: 8,000 (year 2011),  Truck Traffic: 3%,  Average Future Daily Traffic: 9,100 (year 2031),  Design Load: HS 20,  Features Intersected: WATTS BRANCH,  Facility Carried by Structure: GLEN ROAD
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 2.381,  Lanes on structure: 1,  Owner: County Highway Agency,  Approaching Roadway Width: 5.5m (18.0ft),  Material/Design: Steel,  Design/Construction: Stringer/Multi-beam,  Number Of Spans In Main Unit: 1,  Length of Maximum Span: 11.3m (37.1ft),  Curb-To-Curb Width: 4.4m (14.4ft),  Out-to-Out Width: 4.9m (16.1ft)

Condition: Deck: Satisfactory,  Superstructure: Satisfactory,  Substructure: Fair,  Channel: Fair,  Inventory Rating: 85.7 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: Somewhat better than minimum adequacy,  Approach Roadway Alignment: High priority of corrective action,  Length Of Structure Improvement: 1.22m (4.00ft),  Designated Inspection Frequency: Every 24 months,  Inspection Date: January 13,  Bridge Improvement Cost: $40,000,  Roadway Improvement Cost: $4,000,  Total Project Cost: $44,000,  Deck Structure Type: Corrugated Steel,  Wearing Surface/Protective System: Wearing Surface: Bituminous
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Structure Number: 200000M-001501,  Location: 0.6 MI W OF GLEN MILL RD (Lat: 39.047092,  Lng: -77.226481),  Route carried "on" structure: County highway 53,  Year Built: 1935,  Status: Posted for load,  Structure Length: 0.79m (2.59ft),  Average Daily Traffic: 4,400 (year 2011),  Truck Traffic: 5%,  Average Future Daily Traffic: 5,000 (year 2031),  Features Intersected: PINEY BRANCH,  Facility Carried by Structure: GLEN ROAD
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 3.475,  Lanes on structure: 2,  Owner: County Highway Agency,  Approaching Roadway Width: 6.4m (21.0ft),  Material/Design: Concrete,  Design/Construction: Tee Beam,  Number Of Spans In Main Unit: 1,  Length of Maximum Span: 6.7m (22.0ft),  Curb-To-Curb Width: 6.1m (20.0ft),  Out-to-Out Width: 7.2m (23.6ft)

Condition: Deck: Fair,  Superstructure: Fair,  Substructure: Satisfactory,  Channel: Fair,  Operating Rating: 11.8 metric tons,  Inventory Rating: 11.8 metric tons,  Structural Evaluation: High priority of corrective action,  Deck Geometry: High priority of replacement,  Waterway Adequacy: Somewhat better than minimum adequacy,  Approach Roadway Alignment: Equal to present desirable criteria,  Bridge Posting: Required (Relationship of Operating Rating to Maximum Legal Load: > 39.9% below),  Length Of Structure Improvement: 0.79m (2.59ft),  Designated Inspection Frequency: Every 12 months,  Inspection Date: June 14,  Bridge Improvement Cost: $75,000,  Roadway Improvement Cost: $8,000,  Total Project Cost: $83,000 ( Estimate for 2011),  Deck Structure Type: Concrete Cast-file-Place,  Wearing Surface/Protective System: Wearing Surface: Bituminous
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Structure Number: 200000M-001601,  Location: 0.6 MI N OF GLEN RD. (Lat: 39.053869,  Lng: -77.217139),  Route carried "on" structure: County highway 193,  Year Built: 1960,  Year Reconstructed: 2002,  Status: Open,  Structure Length: 0.88m (2.89ft),  Average Daily Traffic: 4,065 (year 2011),  Truck Traffic: 3%,  Average Future Daily Traffic: 4,600 (year 2031),  Design Load: H 20,  Features Intersected: PINEY BRANCH,  Facility Carried by Structure: GLEN MILL ROAD
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 0.917,  Lanes on structure: 2,  Owner: County Highway Agency,  Approaching Roadway Width: 6.7m (22.0ft),  Material/Design: Steel,  Design/Construction: Stringer/Multi-beam,  Number Of Spans In Main Unit: 1,  Length of Maximum Span: 8.2m (26.9ft),  Curb-To-Curb Width: 9.6m (31.5ft),  Out-to-Out Width: 10.2m (33.5ft)

Condition: Deck: Good,  Superstructure: Satisfactory,  Substructure: Satisfactory,  Channel: Satisfactory,  Operating Rating: 68.5 metric tons,  Method Used To Determine Operating Rating: Load Factor (LF),  Inventory Rating: 40.8 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: Better than present minimum criteria,  Approach Roadway Alignment: Equal to present minimum criteria,  Designated Inspection Frequency: Every 24 months,  Inspection Date: January 13,  Deck Structure Type: Corrugated Steel,  Wearing Surface/Protective System: Wearing Surface: Bituminous
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Structure Number: 200000M-002101,  Location: 0.8 MILES NORTH OF MD 190 (Lat: 39.040119,  Lng: -77.234314),  Route carried "on" structure: County highway 197,  Year Built: 1950,  Status: Open,  Structure Length: 1.55m (5.09ft),  Average Daily Traffic: 6,290 (year 2009),  Truck Traffic: 3%,  Average Future Daily Traffic: 7,100 (year 2029),  Features Intersected: WATTS BRANCH,  Facility Carried by Structure: PINEY MEETINGHOUSE
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 0.998,  Lanes on structure: 2,  Owner: County Highway Agency,  Approaching Roadway Width: 7.3m (24.0ft),  Skew: 3 degrees,  Material/Design: Concrete,  Design/Construction: Tee Beam,  Number Of Spans In Main Unit: 1,  Length of Maximum Span: 13.4m (44.0ft),  Curb-To-Curb Width: 7.3m (24.0ft),  Out-to-Out Width: 8.8m (28.9ft)

Condition: Deck: Fair,  Superstructure: Poor,  Substructure: Fair,  Channel: Fair,  Operating Rating: 68.0 metric tons,  Method Used To Determine Operating Rating: Allowable Stress (AS),  Inventory Rating: 40.8 metric tons,  Method Used To Determine Inventory Rating: Allowable Stress (AS),  Structural Evaluation: Meets minimum limits,  Deck Geometry: High priority of replacement,  Waterway Adequacy: Better than present minimum criteria,  Approach Roadway Alignment: Equal to present desirable criteria,  Length Of Structure Improvement: 2.29m (7.51ft),  Designated Inspection Frequency: Every 24 months,  Inspection Date: July 13,  Bridge Improvement Cost: $944,000,  Roadway Improvement Cost: $94,000,  Total Project Cost: $1,038,000 ( Estimate for 2013),  Deck Structure Type: Concrete Cast-file-Place,  Wearing Surface/Protective System: Wearing Surface: Bituminous
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Structure Number: 200000M-011001,  Location: 0.1 MI S OF JCT SR MD 190 (Lat: 38.990572,  Lng: -77.161203),  Route carried "on" structure: County highway 148,  Year Built: 1980,  Status: Open,  Structure Length: 2.59m (8.50ft),  Average Daily Traffic: 9,345 (year 2011),  Truck Traffic: 5%,  Average Future Daily Traffic: 10,560 (year 2031),  Design Load: HS 20,  Features Intersected: CABIN JOHN CREEK,  Facility Carried by Structure: SEVEN LOCKS ROAD
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 1.287,  Lanes on structure: 2,  Owner: County Highway Agency,  Approaching Roadway Width: 7.9m (25.9ft),  Skew: 1 degrees,  Material/Design: Steel,  Design/Construction: Stringer/Multi-beam,  Number Of Spans In Main Unit: 1,  Length of Maximum Span: 24.4m (80.1ft),  Curb or Sidewalk Widths: Left: 0.0m,  Right: 2.1m (6.9ft),  Curb-To-Curb Width: 7.9m (25.9ft),  Out-to-Out Width: 11.0m (36.1ft)

Condition: Deck: Good,  Superstructure: Good,  Substructure: Satisfactory,  Channel: Very good,  Operating Rating: 74.9 metric tons,  Method Used To Determine Operating Rating: Load Factor (LF),  Inventory Rating: 45.0 metric tons,  Method Used To Determine Inventory Rating: Load Factor (LF),  Structural Evaluation: Equal to present minimum criteria,  Deck Geometry: High priority of replacement,  Waterway Adequacy: Better than present minimum criteria,  Approach Roadway Alignment: Equal to present desirable criteria,  Length Of Structure Improvement: 2.59m (8.50ft),  Designated Inspection Frequency: Every 24 months,  Inspection Date: August 13,  Bridge Improvement Cost: $9,000,  Total Project Cost: $9,000 ( Estimate for 2013),  Deck Structure Type: Concrete Cast-file-Place,  Wearing Surface/Protective System: Wearing Surface: Integral Concrete,  Deck Protection: Epoxy Coated Reinforcing
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Structure Number: 200000M-014502,  Location: 1 MI E OF SEVEN LOCKS RD (Lat: 39.036672,  Lng: -77.154289),  Route carried "on" structure: County highway 164,  Year Built: 1966,  Status: Open,  Structure Length: 1.80m (5.91ft),  Average Daily Traffic: 22,300 (year 2011),  Truck Traffic: 5%,  Average Future Daily Traffic: 25,250 (year 2031),  Design Load: HS 20+Mod,  Features Intersected: CABIN JOHN CREEK,  Facility Carried by Structure: TUCKERMAN LANE
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 2.639,  Lanes on structure: 2,  Owner: County Highway Agency,  Approaching Roadway Width: 13.4m (44.0ft),  Material/Design: Concrete,  Design/Construction: Culvert,  Number Of Spans In Main Unit: 4,  Length of Maximum Span: 4.3m (14.1ft),  Curb-To-Curb Width: 13.4m (44.0ft),  Out-to-Out Width: 14.0m (45.9ft)

Condition: Channel: Fair,  Culverts: Good,  Inventory Rating: 68.0 metric tons,  Method Used To Determine Inventory Rating: Load Factor (LF),  Structural Evaluation: Better than present minimum criteria,  Deck Geometry: Equal to 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: June 13
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Structure Number: 200000M-016903,  Location: .5 MI W OF SEVEN LOCKS RD (Lat: 39.041119,  Lng: -77.162192),  Route carried "on" structure: County highway 164,  Year Built: 1966,  Status: Open,  Structure Length: 0.85m (2.79ft),  Average Daily Traffic: 18,600 (year 2011),  Truck Traffic: 5%,  Average Future Daily Traffic: 21,000 (year 2031),  Design Load: HS 20,  Features Intersected: SNAKEDEN BRANCH,  Facility Carried by Structure: TUCKERMAN LANE
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 3.492,  Lanes on structure: 4,  Owner: County Highway Agency,  Approaching Roadway Width: 14.6m (47.9ft),  Material/Design: Steel,  Design/Construction: Culvert,  Number Of Spans In Main Unit: 2,  Length of Maximum Span: 3.7m (12.1ft),  Curb or Sidewalk Widths: Left: 1.5m (4.9ft),  Right: 1.5m (4.9ft)

Condition: Channel: Satisfactory,  Culverts: Fair,  Structural Evaluation: Somewhat better than minimum adequacy,  Waterway Adequacy: Better than present minimum criteria,  Approach Roadway Alignment: Equal to present desirable criteria,  Length Of Structure Improvement: 0.85m (2.79ft),  Designated Inspection Frequency: Every 24 months,  Inspection Date: June 13,  Bridge Improvement Cost: $60,000,  Roadway Improvement Cost: $6,000,  Total Project Cost: $66,000 ( Estimate for 2013)
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Structure Number: 200000M-017001,  Location: 0.6 MI NORTH OF GLEN ROAD (Lat: 39.054122,  Lng: -77.201558),  Route carried "on" structure: County highway 3708,  Year Built: 1970,  Status: Posted for load,  Structure Length: 3.60m (11.81ft),  Average Daily Traffic: 2,300 (year 2011),  Truck Traffic: 5%,  Average Future Daily Traffic: 2,600 (year 2031),  Design Load: H 15,  Features Intersected: WATTS BRANCH,  Facility Carried by Structure: AMBLESIDE DRIVE
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 0.531,  Lanes on structure: 2,  Owner: County Highway Agency,  Approaching Roadway Width: 7.9m (25.9ft),  Material/Design: Steel,  Design/Construction: Stringer/Multi-beam,  Number Of Spans In Main Unit: 1,  Length of Maximum Span: 28.0m (91.9ft),  Curb or Sidewalk Widths: Left: 1.5m (4.9ft),  Right: 0.8m (2.6ft),  Curb-To-Curb Width: 7.9m (25.9ft),  Out-to-Out Width: 10.7m (35.1ft)

Condition: Deck: Good,  Superstructure: Satisfactory,  Substructure: Good,  Channel: Good,  Operating Rating: 72.6 metric tons,  Method Used To Determine Operating Rating: Load Factor (LF),  Inventory Rating: 43.5 metric tons,  Method Used To Determine Inventory Rating: Load Factor (LF),  Structural Evaluation: Equal to present minimum criteria,  Deck Geometry: High priority of corrective action,  Waterway Adequacy: Better than present minimum criteria,  Approach Roadway Alignment: Equal to present desirable criteria,  Length Of Structure Improvement: 3.60m (11.81ft),  Designated Inspection Frequency: Every 24 months,  Inspection Date: July 13,  Bridge Improvement Cost: $32,000,  Roadway Improvement Cost: $3,000,  Total Project Cost: $35,000 ( Estimate for 2013),  Deck Structure Type: Concrete Cast-file-Place,  Wearing Surface/Protective System: Wearing Surface: Bituminous
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Structure Number: 200000M-020801,  Location: 0.1 MI N OF JCT SR 190 (Lat: 39.042533,  Lng: -77.252961),  Route carried "on" structure: County highway 5961,  Year Built: 1985,  Status: Open,  Structure Length: 5.61m (18.41ft),  Average Daily Traffic: 130 (year 2011),  Truck Traffic: 3%,  Average Future Daily Traffic: 170 (year 2031),  Design Load: HS 20,  Features Intersected: WATTS BRANCH,  Facility Carried by Structure: LAKE POTOMAC DRIVE
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),  Material/Design: Steel continuous,  Design/Construction: Stringer/Multi-beam,  Number Of Spans In Main Unit: 3,  Length of Maximum Span: 21.3m (69.9ft),  Curb or Sidewalk Widths: Left: 1.5m (4.9ft),  Right: 1.5m (4.9ft),  Curb-To-Curb Width: 7.9m (25.9ft),  Out-to-Out Width: 11.6m (38.1ft)

Condition: Deck: Good,  Superstructure: Good,  Substructure: Good,  Channel: Satisfactory,  Operating Rating: 60.8 metric tons,  Method Used To Determine Operating Rating: Load Factor (LF),  Inventory Rating: 36.7 metric tons,  Method Used To Determine Inventory Rating: Load Factor (LF),  Structural Evaluation: Better than present minimum criteria,  Deck Geometry: Somewhat better than minimum adequacy,  Waterway Adequacy: Better than present minimum criteria,  Approach Roadway Alignment: Equal to present minimum criteria,  Designated Inspection Frequency: Every 24 months,  Inspection Date: June 13,  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: 200000M-023703,  Location: 1.5 MI E OF JCT SR MD 189 (Lat: 39.023400,  Lng: -77.178442),  Route carried "on" structure: County highway 166,  Year Built: 1989,  Status: Open,  Structure Length: 0.91m (2.99ft),  Average Daily Traffic: 13,800 (year 2011),  Truck Traffic: 5%,  Average Future Daily Traffic: 15,600 (year 2031),  Design Load: HS 20,  Features Intersected: BUCK BRANCH TRIBUTARY,  Facility Carried by Structure: DEMOCRACY BLVD
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: Steel,  Design/Construction: Culvert,  Number Of Spans In Main Unit: 2,  Length of Maximum Span: 4.3m (14.1ft)

Condition: Channel: Good,  Culverts: Fair,  Structural Evaluation: Somewhat better than minimum adequacy,  Waterway Adequacy: Better than present minimum criteria,  Approach Roadway Alignment: Equal to present desirable criteria,  Designated Inspection Frequency: Every 24 months,  Inspection Date: Febuary 13
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Structure Number: 200000M-024002,  Location: 2 MI E OF JCT SR MD 189 (Lat: 39.022356,  Lng: -77.172936),  Route carried "on" structure: County highway 166,  Year Built: 1988,  Status: Open,  Structure Length: 1.52m (4.99ft),  Average Daily Traffic: 13,800 (year 2011),  Truck Traffic: 5%,  Average Future Daily Traffic: 15,600 (year 2031),  Design Load: HS 20,  Features Intersected: BUCK BRANCH,  Facility Carried by Structure: DEMOCRACY BLVD
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,  Design/Construction: Culvert,  Number Of Spans In Main Unit: 3,  Length of Maximum Span: 3.0m (9.8ft)

Condition: Channel: Fair,  Culverts: Satisfactory,  Inventory Rating: 83.0 metric tons,  Method Used To Determine Inventory Rating: Load Factor (LF),  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: Febuary 13
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Structure Number: 200000M-031602,  Location: 0.4 MI NORTH OF MD 191 (Lat: 39.009331,  Lng: -77.179800),  Route carried "on" structure: County highway 191,  Year Built: 2002,  Status: Open,  Structure Length: 0.67m (2.20ft),  Average Daily Traffic: 531 (year 2011),  Truck Traffic: 5%,  Average Future Daily Traffic: 600 (year 2031),  Design Load: HS 20,  Features Intersected: KEN BRANCH,  Facility Carried by Structure: KENDALE 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: 1 degrees,  Material/Design: Concrete,  Design/Construction: Culvert,  Number Of Spans In Main Unit: 3,  Length of Maximum Span: 1.8m (5.9ft)

Condition: Channel: Good,  Culverts: Satisfactory,  Operating Rating: 71.7 metric tons,  Method Used To Determine Operating Rating: Load Factor (LF),  Inventory Rating: 42.6 metric tons,  Method Used To Determine Inventory Rating: Load Factor (LF),  Structural Evaluation: Equal to present minimum criteria,  Waterway Adequacy: Meets minimum limits,  Approach Roadway Alignment: Equal to present minimum criteria,  Designated Inspection Frequency: Every 24 months,  Inspection Date: June 13
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Structure Number: 3300030P,  Location: 0.7 MILES WEST OF MACARTH (Lat: 38.972722,  Lng: -77.195389),  Route carried "on" structure: Alternate Federal lands road 6,  Year Built: 1962,  Year Reconstructed: 1991,  Status: Open,  Structure Length: 3.59m (11.78ft),  Average Daily Traffic: 2,000 (year 2013),  Truck Traffic: 20%,  Average Future Daily Traffic: 2,200 (year 2033),  Design Load: H 20,  Features Intersected: CLARA BARTON PARKWAY,  Facility Carried by Structure: CARDEROCK ACCESS C
Minimum Vertical Clearance: 30+ m (98+ ft),  Kilometerpoint: 9.870,  Lanes on structure: 2,  Lanes under structure: 4,  Owner: National Park Service,  Approaching Roadway Width: 11.0m (36.1ft),  Material/Design: Prestressed concrete,  Design/Construction: Stringer/Multi-beam,  Number Of Spans In Main Unit: 1,  Length of Maximum Span: 33.8m (110.9ft),  Curb or Sidewalk Widths: Left: 1.2m (3.9ft),  Right: 1.2m (3.9ft),  Curb-To-Curb Width: 11.0m (36.1ft),  Out-to-Out Width: 14.2m (46.6ft)

Condition: Deck: Good,  Superstructure: Good,  Substructure: Fair,  Operating Rating: 47.0 metric tons,  Method Used To Determine Operating Rating: Allowable Stress (AS),  Inventory Rating: 28.0 metric tons,  Method Used To Determine Inventory Rating: Allowable Stress (AS),  Structural Evaluation: Somewhat better than minimum adequacy,  Deck Geometry: Equal to present minimum criteria,  Underclear: Somewhat better than minimum adequacy,  Approach Roadway Alignment: Equal to present desirable criteria,  Designated Inspection Frequency: Every 24 months,  Inspection Date: April 13,  Bridge Improvement Cost: $120,000,  Roadway Improvement Cost: $12,000,  Total Project Cost: $180,000 ( Estimate for 2007),  Deck Structure Type: Concrete Cast-file-Place
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