OVANDO HELMVILLE R over BIG BLACKFOOT RIVER 006

Map

Coordinates:
+46.89670, -113.06072
46°53'48" N, 113°03'39" W

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

Name:	OVANDO HELMVILLE R over BIG BLACKFOOT RIVER 006
Structure number:	L39001011+04001
Location:	6M N HELMVILLE
Purpose:	Carries highway over waterway
Route classification:	Local (Rural) `[09]`
Length of largest span:	101.1 ft. `[30.8 m]`
Total length:	189.0 ft. `[57.6 m]`
Roadway width between curbs:	20.0 ft. `[6.1 m]`
Deck width edge-to-edge:	21.7 ft. `[6.6 m]`
Owner:	County Highway Agency `[02]`
Year built:	1931
Year reconstructed:	1953
Historic significance:	Bridge is not eligible for the National Register of Historic Places `[5]`
Design load:	MS 13.5 / HS 15 `[3]`
Main span material:	Steel `[3]`
Main span design:	Truss - Thru `[10]`
Deck type:	Concrete Cast-in-Place `[1]`
Wearing surface:	Monolithic Concrete (concurrently placed with structural deck) `[1]`

Good/Fair/Poor Condition:	Fair
Status:	Open, no restriction `[A]`
Average daily traffic:	20 `[as of 2017]`
Deck condition:	Satisfactory `[6 out of 9]`
Superstructure condition:	Satisfactory `[6 out of 9]`
Substructure condition:	Satisfactory `[6 out of 9]`
Structural appraisal:	Meets minimum tolerable limits to be left in place as is `[4]`
Deck geometry appraisal:	Somewhat better than minimum adequacy to tolerate being left in place as is `[5]`
Water adequacy appraisal:	Equal to present desirable criteria `[8]`
Roadway alignment appraisal:	Better than present minimum criteria `[7]`
Channel protection:	Banks are protected or well vegetated. River control devices such as spur dikes and embankment protection are not required or are in a stable condition. `[8]`
Scour condition:	Bridge foundations determined to be stable for assessed or calculated scour condition. `[5]`
Sufficiency rating:	67.2

Date	Condition	Deck	Superstructure	Substructure	ADT	Suff. Rating
April 2018	Fair	Satisfactory	Satisfactory	Satisfactory	20	67.2
April 2016	Fair	Satisfactory	Satisfactory	Satisfactory	20	67.2
April 2014	Fair	Good	Satisfactory	Good	100	69.0
April 2012	Fair	Good	Satisfactory	Good	100	68.0
April 2010	Fair	Good	Satisfactory	Good	100	68.0
April 2008	Good	Good	Good	Good	100	68.0
March 2006	Good	Good	Good	Good	100	68.0
August 2004	Good	Good	Good	Good	100	68.0
April 2002	Good	Good	Very Good	Very Good	100	68.0
January 2000	Good	Good	Very Good	Very Good	100	68.0
April 1998	Good	Good	Very Good	Very Good	100	68.0
June 1995	Good	Good	Very Good	Very Good	31	66.9
October 1992	Good	Good	Very Good	Very Good	31	82.4
September 1990	Good	Good	Good	Very Good	96	84.4

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

Element	Units	Quantity	1-Good	2-Fair	3-Poor	4-Serious
Superstructure
Reinforced Concrete Girder/Beam	linear ft.	262	262	0	0	0
Steel Stringer	linear ft.	509	204	305	0	0
Steel Protective Coating	sq. ft.	2,036	1,873	41	61	61
Deck
Reinforced Concrete Deck	sq. ft.	2,202	1,063	1,119	20	0
Superstructure
Steel Truss	linear ft.	203	0	203	0	0
Steel Protective Coating	sq. ft.	4,233	0	2,539	847	847
Steel Floor Beam	linear ft.	174	35	139	0	0
Steel Protective Coating	sq. ft.	1,196	777	120	120	179
Deck
Reinforced Concrete Top Flange	sq. ft.	1,918	959	959	0	0
Superstructure
Steel Gusset Plate	each	26	0	26	0	0
Steel Protective Coating	sq. ft.	364	200	73	36	55
Substructure
Reinforced Concrete Column	each	4	0	4	0	0
Reinforced Concrete Abutment	linear ft.	56	56	0	0	0
Reinforced Concrete Pier Cap	linear ft.	43	26	17	0	0
Joints
Open Joint	linear ft.	20	0	20	0	0
Assembly without Seal Joint	linear ft.	20	0	20	0	0
Bearings
Movable Bearing	each	2	0	0	2	0
Steel Protective Coating	sq. ft.	2	0	0	1	1
Fixed Bearing	each	2	0	2	0	0
Steel Protective Coating	sq. ft.	2	0	0	1	1
Bridge Rail
Steel or Aluminum Bridge Rail	linear ft.	380	0	380	0	0
Steel Protective Coating	sq. ft.	1,587	0	794	476	317