SR 20 EXTENSION over KEYSTONE HARBOR

Map

Coordinates:
+48.15936, -122.67272
48°09'34" N, 122°40'22" W

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]`

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

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

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