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S 21 over INT CONRAD I 15

Pondera County, Montana

Map

Coordinates:
+48.18132, -111.93544
48°10'53" N, 111°56'08" W

Facts

Source: National Bridge Inventory. Information not verified; use at your own risk.

Name:	S 21 over INT CONRAD I 15
Structure number:	P00021005+01641
Location:	CONRAD
Purpose:	Carries highway overpass over highway
Route classification:	Minor Arterial (Rural) `[06]`
Length of largest span:	122.1 ft. `[37.2 m]`
Total length:	371.1 ft. `[113.1 m]`
Roadway width between curbs:	47.6 ft. `[14.5 m]`
Deck width edge-to-edge:	50.2 ft. `[15.3 m]`
Vertical clearance below bridge:	16.4 ft. `[5.0 m]`
Skew angle:	28°
Owner:	State Highway Agency `[01]`
Year built:	1972
Historic significance:	Bridge is not eligible for the National Register of Historic Places `[5]`
Number of main spans:	2
Main spans material:	Steel continuous `[4]`
Main spans design:	Stringer/Multi-beam or girder `[02]`
Deck type:	Concrete Cast-in-Place `[1]`
Wearing surface:	Monolithic Concrete (concurrently placed with structural deck) `[1]`

Latest Available Inspection: June 2017

Good/Fair/Poor Condition:	Poor
Status:	Open, no restriction `[A]`
Average daily traffic:	1,968 `[as of 2016]`
Truck traffic:	2% of total traffic
Deck condition:	Poor `[4 out of 9]`
Superstructure condition:	Satisfactory `[6 out of 9]`
Substructure condition:	Satisfactory `[6 out of 9]`
Structural appraisal:	Somewhat better than minimum adequacy to tolerate being left in place as is `[5]`
Deck geometry appraisal:	Superior to present desirable criteria `[9]`
Underclearances appraisal:	Better than present minimum criteria `[7]`
Roadway alignment appraisal:	Better than present minimum criteria `[7]`
Scour condition:	Bridge not over waterway. `[N]`
Sufficiency rating:	84.8

Previous Inspections

Date	Condition	Deck	Superstructure	Substructure	ADT	Suff. Rating
June 2017	Poor	Poor	Satisfactory	Satisfactory	1968	84.8
June 2015	Fair	Fair	Satisfactory	Satisfactory	2270	99.0
July 2013	Fair	Fair	Satisfactory	Satisfactory	2270	99.0
July 2011	Fair	Satisfactory	Satisfactory	Satisfactory	2270	100.0
July 2009	Fair	Satisfactory	Satisfactory	Satisfactory	2190	100.0
June 2007	Fair	Satisfactory	Satisfactory	Satisfactory	2430	100.0
April 2005	Good	Good	Good	Good	2240	100.0
April 2003	Good	Good	Good	Good	2120	100.0
August 2001	Good	Good	Good	Good	2120	99.0
April 1999	Fair	Good	Good	Satisfactory	1530	100.0
December 1996	Fair	Good	Satisfactory	Satisfactory	2010	100.0
November 1994	Fair	Good	Satisfactory	Satisfactory	2050	98.0
February 1991	Good	Good	Good	Good	1830	98.0

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.	2,224	1,739	461	24	0
Steel Protective Coating	sq. ft.	30,278	21,195	6,055	1,514	1,514
Deck
Reinforced Concrete Deck	sq. ft.	18,815	18,815	0	0	0
Substructure
Reinforced Concrete Column	each	9	9	0	0	0
Reinforced Concrete Abutment	linear ft.	154	146	8	0	0
Reinforced Concrete Pier Cap	linear ft.	171	170	0	1	0
Joints
Strip Seal Joint	linear ft.	115	115	0	0	0
Bearings
Movable Bearing	each	24	0	11	13	0
Steel Protective Coating	sq. ft.	24	0	20	2	2
Fixed Bearing	each	18	0	6	12	0
Steel Protective Coating	sq. ft.	18	0	4	3	11
Bridge Rail
Steel or Aluminum Bridge Rail	linear ft.	742	0	742	0	0
Steel Protective Coating	sq. ft.	1,237	743	372	61	61

© Copyright 2012-20, James Baughn
Disclaimer: All data is taken from the National Bridge Inventory and has not been verified.
This page's URL is http://bridgereports.com/1318054