Share:

OR 99W(HWY 001W) over COLUMBIA SLOUGH

Map 

Coordinates:
+45.59161, -122.68654
45°35'30" N, 122°41'12" W
Source: National Bridge Inventory
Information not verified. Use at your own risk.

Facts 

Name:OR 99W(HWY 001W) over COLUMBIA SLOUGH
Structure number:04517 01WX00511
Location:5.1 MI N OF PORTLAND CC
Purpose:Carries highway over highway and waterway
Route classification:Minor Arterial (Urban) [16]
Length of largest span:78.1 ft. [23.8 m]
Total length:674.9 ft. [205.7 m]
Roadway width between curbs:40.7 ft. [12.4 m]
Deck width edge-to-edge:49.5 ft. [15.1 m]
Vertical clearance below bridge:13.8 ft. [4.2 m]
Owner:State Highway Agency [01]
Year built:1916
Historic significance:Historical significance is not determinable at this time [4]
Design load:MS 13.5 / HS 15 [3]
Number of main spans:3
Main spans material:Steel [3]
Main spans design:Girder and floorbeam system [03]
Deck type:Concrete Cast-in-Place [1]
Wearing surface:Monolithic Concrete (concurrently placed with structural deck) [1]

Latest Available Inspection: February 2016 

Status:Open, no restriction [A]
Average daily traffic:10,700 [as of 2014]
Truck traffic:5% of total traffic
Deck condition:Fair [5 out of 9]
Superstructure condition:Fair [5 out of 9]
Substructure condition:Fair [5 out of 9]
Structural appraisal:Basically intolerable requiring high priority of corrrective action [3]
Deck geometry appraisal:Somewhat better than minimum adequacy to tolerate being left in place as is [5]
Underclearances appraisal:Basically intolerable requiring high priority of corrrective action [3]
Water adequacy appraisal:Equal to present desirable criteria [8]
Roadway alignment appraisal:Equal to present desirable criteria [8]
Channel protection:Bank is beginning to slump. River control devices and embankment protection have widespread minor damage. There is minor stream bed movement evident. Debris is restricting the channel slightly. [6]
Scour condition:Bridge foundations determined to be stable for assessed or calculated scour condition. [5]
Operating rating:22.8 tons [20.7 metric tons]
Inventory rating:17.5 tons [15.9 metric tons]
Evaluation:Functionally obsolete [2]
Sufficiency rating:53.2
Recommended work:Widening of existing bridge or other major structure without deck rehabilitation or replacement [33]
Estimated cost of work:$3,458,000

Previous Inspections 

DateSuff. ratingEvaluationDeckSuper.Sub.ADT
February 201653.2Functionally obsoleteFairFairFair10700
February 201451.7Functionally obsoleteFairFairFair12500
April 201351.7Functionally obsoleteFairFairFair12500
April 201170.3Functionally obsoleteFairFairFair12500
February 201166.9Functionally obsoleteFairFairSatisfactory29800
February 200966.9Functionally obsoleteFairFairSatisfactory29800
January 200769.5Functionally obsoleteFairFairSatisfactory16789
January 200569.3Functionally obsoleteFairFairSatisfactory16300
January 200349.9Functionally obsoleteFairFairSatisfactory16300
January 200147.4Structurally deficientPoorGoodSatisfactory16100
January 199948.9Functionally obsoleteSatisfactoryGoodSatisfactory12300
January 199748.9Functionally obsoleteSatisfactoryGoodSatisfactory12300
January 199548.7Functionally obsoleteSatisfactoryGoodSatisfactory12300
January 199356.3Functionally obsoleteSatisfactoryGoodSatisfactory12300
January 199154.0Functionally obsoleteSatisfactoryGoodGood13500