SR 20 EXTENSION over KEYSTONE HARBOR
Map
Coordinates:
+48.15936, -122.6727248°09'34" N, 122°40'22" W
Facts
Source: National Bridge Inventory. Information not verified; use at your own risk.
Name: | SR 20 EXTENSION over KEYSTONE HARBOR |
Structure number: | 0001697A0000000 |
Location: | 3.4 W JCT SR 525 |
Purpose: | Carries highway and pedestrian walkway over waterway |
Route classification: | Principal Arterial - Other (Rural) [02] |
Tolls: | Yes [1] |
Length of largest span: | 80.1 ft. [24.4 m] |
Total length: | 105.0 ft. [32.0 m] |
Roadway width between curbs: | 20.0 ft. [6.1 m] |
Deck width edge-to-edge: | 24.0 ft. [7.3 m] |
Vertical clearance above deck: | 16.1 ft. [4.9 m] |
Owner: | State Highway Agency [01] |
Year built: | 1979 |
Historic significance: | Bridge is not eligible for the National Register of Historic Places [5] |
Design load: | MS 18 / HS 20 [5] |
Number of main spans: | 2 |
Main spans material: | Steel [3] |
Main spans design: | Movable - Lift [15] |
Deck type: | Closed Grating [4] |
Wearing surface: | Epoxy Overlay [5] |
Latest Available Inspection: June 2017
Good/Fair/Poor Condition: | Fair |
Status: | Open, no restriction [A] |
Average daily traffic: | 1,863 [as of 2010] |
Truck traffic: | 2% of total traffic |
Deck condition: | Fair [5 out of 9] |
Superstructure condition: | Satisfactory [6 out of 9] |
Substructure condition: | Satisfactory [6 out of 9] |
Structural appraisal: | Equal to present minimum criteria [6] |
Deck geometry appraisal: | Basically intolerable requiring high priority of replacement [2] |
Water adequacy appraisal: | Equal to present desirable criteria [8] |
Roadway alignment appraisal: | Equal to present desirable criteria [8] |
Channel protection: | Bank protection is in need of minor repairs. River control devices and embankment protection have a little minor damage. Banks and/or channel have minor amounts of drift. [7] |
Pier/abutment protection: | In place and functioning [2] |
Scour condition: | Bridge is scour critical; bridge foundations determined to be unstable. [3] |
Sufficiency rating: | 50.2 |
Recommended work: | Bridge rehabilitation because of general structure deterioration or inadequate strength. [35] |
Estimated cost of work: | $1,008,000 |
Previous Inspections
Date | Condition | Deck | Superstructure | Substructure | ADT | Suff. Rating |
---|
June 2017 | Fair | Fair | Satisfactory | Satisfactory | 1863 | 50.2 |
June 2015 | Fair | Fair | Satisfactory | Satisfactory | 1863 | 50.0 |
June 2013 | Fair | Fair | Satisfactory | Satisfactory | 1863 | 50.0 |
June 2011 | Fair | Satisfactory | Satisfactory | Satisfactory | 1863 | 51.0 |
June 2010 | Fair | Satisfactory | Satisfactory | Satisfactory | 975 | 47.8 |
June 2008 | Fair | Satisfactory | Satisfactory | Satisfactory | 975 | 65.6 |
June 2006 | Fair | Satisfactory | Satisfactory | Satisfactory | 1550 | 60.9 |
July 2005 | Fair | Satisfactory | Satisfactory | Satisfactory | 1090 | 57.9 |
July 2004 | Fair | Satisfactory | Satisfactory | Satisfactory | 1090 | 57.9 |
April 2003 | Fair | Satisfactory | Satisfactory | Satisfactory | 1090 | 57.9 |
June 2001 | Fair | Satisfactory | Satisfactory | Satisfactory | 1090 | 56.0 |
August 2000 | Fair | Satisfactory | Satisfactory | Satisfactory | 1090 | 56.0 |
April 1999 | Fair | Satisfactory | Satisfactory | Satisfactory | 1090 | 56.0 |
May 1998 | Fair | Satisfactory | Satisfactory | Satisfactory | 1090 | 56.0 |
May 1997 | Fair | Satisfactory | Satisfactory | Satisfactory | 1090 | 58.5 |
May 1996 | Fair | Satisfactory | Satisfactory | Satisfactory | 1090 | 58.6 |
April 1994 | Fair | Satisfactory | Satisfactory | Satisfactory | 611 | 46.5 |
Element Data
Source: National Bridge Elements dataset, 2019 edition. This feature is experimental.
Element | Units | Quantity | 1-Good | 2-Fair | 3-Poor | 4-Serious |
---|
Superstructure |
Steel Girder/Beam | linear ft. | 180 | 174 | 0 | 6 | 0 |
Steel Protective Coating | sq. ft. | 1,006 | 992 | 0 | 13 | 1 |
Steel Stringer | linear ft. | 450 | 405 | 0 | 45 | 0 |
Steel Protective Coating | sq. ft. | 2,517 | 2,482 | 0 | 34 | 1 |
Steel Floor Beam | linear ft. | 272 | 251 | 0 | 21 | 0 |
Steel Protective Coating | sq. ft. | 1,521 | 1,500 | 0 | 20 | 1 |
Steel Pin or Pin & Hangar Assembly | each | 4 | 3 | 0 | 1 | 0 |
Substructure |
Reinforced Concrete Abutment | linear ft. | 30 | 29 | 0 | 1 | 0 |
Steel Pile | each | 8 | 8 | 0 | 0 | 0 |
Steel Protective Coating | sq. ft. | 44 | 44 | 0 | 0 | 0 |
Reinforced Concrete Pier Cap | linear ft. | 96 | 96 | 0 | 0 | 0 |
Deck |
Concrete Filled Grid Deck | sq. ft. | 1,800 | 900 | 0 | 900 | 0 |
Wearing Surfaces | sq. ft. | 1,800 | 0 | 1,735 | 0 | 65 |
Joints |
Assembly without Seal Joint | linear ft. | 20 | 0 | 20 | 0 | 0 |
Bearings |
Fixed Bearing | each | 2 | 0 | 0 | 2 | 0 |
Bridge Rail |
Steel or Aluminum Bridge Rail | linear ft. | 28 | 28 | 0 | 0 | 0 |