BIRDTAIL RD over FLAT CREEK 036

Map

Coordinates:
+47.25192, -112.06488
47°15'07" N, 112°03'54" W

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

Name:	BIRDTAIL RD over FLAT CREEK 036
Structure number:	L25320003+09001
Location:	8M SE BOWMANS
Purpose:	Carries highway over waterway
Route classification:	Local (Rural) `[09]`
Length of largest span:	59.1 ft. `[18.0 m]`
Total length:	61.0 ft. `[18.6 m]`
Roadway width between curbs:	15.7 ft. `[4.8 m]`
Deck width edge-to-edge:	16.1 ft. `[4.9 m]`
Owner:	County Highway Agency `[02]`
Year built:	1901
Historic significance:	Bridge is not eligible for the National Register of Historic Places `[5]`
Main span material:	Steel `[3]`
Main span design:	Truss - Thru `[10]`
Deck type:	Wood or Timber `[8]`
Wearing surface:	Wood or Timber `[7]`

Good/Fair/Poor Condition:	Fair
Status:	Posted for load `[P]`
Average daily traffic:	100 `[as of 2002]`
Deck condition:	Satisfactory `[6 out of 9]`
Superstructure condition:	Satisfactory `[6 out of 9]`
Substructure condition:	Fair `[5 out of 9]`
Structural appraisal:	Basically intolerable requiring high priority of replacement `[2]`
Deck geometry appraisal:	Equal to present desirable criteria `[8]`
Water adequacy appraisal:	Equal to present desirable criteria `[8]`
Roadway alignment appraisal:	Equal to present minimum criteria `[6]`
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]`
Sufficiency rating:	26.0
Recommended work:	Replacement of bridge or other structure because of substandard load carrying capacity or substantial bridge roadway geometry. `[31]`
Estimated cost of work:	$164,000

Date	Condition	Deck	Superstructure	Substructure	ADT	Suff. Rating
November 2017	Fair	Satisfactory	Satisfactory	Fair	100	26.0
November 2015	Fair	Satisfactory	Satisfactory	Fair	100	26.0
December 2013	Fair	Satisfactory	Satisfactory	Fair	100	26.0
January 2012	Fair	Satisfactory	Satisfactory	Fair	100	26.0
January 2010	Fair	Satisfactory	Satisfactory	Fair	100	26.0
January 2008	Fair	Satisfactory	Satisfactory	Fair	100	26.0
February 2006	Fair	Satisfactory	Satisfactory	Fair	100	26.0
March 2004	Fair	Satisfactory	Satisfactory	Fair	100	26.0
February 2002	Fair	Satisfactory	Satisfactory	Fair	100	26.0
December 1999	Fair	Satisfactory	Satisfactory	Fair	100	26.0
March 1997	Fair	Good	Good	Satisfactory	100	37.2
July 1995	Fair	Good	Good	Satisfactory	31	38.9
October 1992	Fair	Satisfactory	Good	Satisfactory	31	41.2
January 1991	Fair	Very Good	Good	Satisfactory	31	41.2

Source: National Bridge Elements dataset, 2019 edition. This feature is experimental.

Element	Units	Quantity	1-Good	2-Fair	3-Poor	4-Serious
Superstructure
Steel Stringer	linear ft.	610	0	610	0	0
Steel Protective Coating	sq. ft.	1,068	320	214	214	320
Timber Stringer	linear ft.	62	35	27	0	0
Steel Truss	linear ft.	121	0	115	6	0
Steel Protective Coating	sq. ft.	385	38	154	77	116
Steel Floor Beam	linear ft.	82	0	82	0	0
Steel Protective Coating	sq. ft.	262	79	52	52	79
Substructure
Steel Column	each	4	0	4	0	0
Steel Protective Coating	sq. ft.	226	1	90	45	90
Timber Abutment	linear ft.	69	26	43	0	0
Deck
Timber Deck	sq. ft.	980	443	293	244	0
Bearings
Fixed Bearing	each	4	0	4	0	0
Steel Protective Coating	sq. ft.	4	0	2	1	1
Bridge Rail
Steel or Aluminum Bridge Rail	linear ft.	121	0	121	0	0
Steel Protective Coating	sq. ft.	161	0	16	48	97