FRONTAGE/OLD 20 over NIOBRARA RIVER

Map

Coordinates:
+42.83219, -100.52819
42°49'56" N, 100°31'41" W

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

Name:	FRONTAGE/OLD 20 over NIOBRARA RIVER
Structure number:	S020 19981
Location:	3SE VALENTINE
Purpose:	Carries highway over waterway
Route classification:	Local (Rural) `[09]`
Length of largest span:	145.3 ft. `[44.3 m]`
Total length:	293.0 ft. `[89.3 m]`
Roadway width between curbs:	24.0 ft. `[7.3 m]`
Deck width edge-to-edge:	25.3 ft. `[7.7 m]`
Owner:	State Highway Agency `[01]`
Year built:	1931
Year reconstructed:	1997
Historic significance:	Bridge is on the National Register of Historic Places `[1]`
Design load:	M 13.5 / H 15 `[2]`
Number of main spans:	3
Main spans material:	Steel continuous `[4]`
Main spans design:	Truss - Deck `[09]`
Deck type:	Concrete Cast-in-Place `[1]`
Wearing surface:	Low slump Concrete `[4]`

Good/Fair/Poor Condition:	Fair
Status:	Open, no restriction `[A]`
Average daily traffic:	25 `[as of 1998]`
Truck traffic:	21% of total traffic
Deck condition:	Good `[7 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:	Equal to present minimum criteria `[6]`
Water adequacy appraisal:	Equal to present desirable criteria `[8]`
Roadway alignment appraisal:	Equal to present minimum criteria `[6]`
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:	Navigation protection not required `[1]`
Scour condition:	Bridge foundations determined to be stable for assessed or calculated scour condition. `[5]`
Sufficiency rating:	82.4
Recommended work:	Widening of existing bridge with deck rehabilitation or replacement. `[34]`

Date	Condition	Deck	Superstructure	Substructure	ADT	Suff. Rating
July 2018	Fair	Good	Satisfactory	Satisfactory	25	82.4
July 2016	Fair	Good	Satisfactory	Satisfactory	25	75.5
February 2015	Fair	Good	Satisfactory	Satisfactory	25	75.5
July 2014	Fair	Good	Satisfactory	Satisfactory	25	75.5
July 2012	Fair	Good	Satisfactory	Satisfactory	25	76.8
November 2011	Fair	Good	Satisfactory	Satisfactory	25	76.8
December 2009	Fair	Good	Satisfactory	Satisfactory	25	76.8
August 2007	Fair	Good	Satisfactory	Fair	25	66.8
March 2005	Fair	Excellent	Satisfactory	Satisfactory	25	76.8
July 2003	Fair	Excellent	Satisfactory	Satisfactory	25	76.8
March 2001	Fair	Excellent	Satisfactory	Satisfactory	25	76.8
June 1999	Fair	Excellent	Satisfactory	Satisfactory	25	76.8
July 1997	Poor	Poor	Satisfactory	Satisfactory	1880	54.3
July 1995	Fair	Fair	Satisfactory	Satisfactory	1770	52.4
August 1993	Fair	Fair	Satisfactory	Satisfactory	1655	52.5
July 1991	Fair	Fair	Satisfactory	Satisfactory	1695	77.6

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.	1,735	1,735	0	0	0
Steel Protective Coating	sq. ft.	6,290	6,230	60	0	0
Deck
Reinforced Concrete Deck	sq. ft.	7,327	7,227	100	0	0
Wearing Surfaces	sq. ft.	6,374	6,074	300	0	0
Superstructure
Steel Truss	linear ft.	581	519	0	62	0
Steel Protective Coating	sq. ft.	3,302	2,312	0	660	330
Steel Floor Beam	linear ft.	683	683	0	0	0
Steel Protective Coating	sq. ft.	4,704	4,234	470	0	0
Steel Gusset Plate	each	96	96	0	0	0
Substructure
Reinforced Concrete Column	each	4	0	0	4	0
Reinforced Concrete Pier Wall	linear ft.	36	36	0	0	0
Reinforced Concrete Abutment	linear ft.	88	0	68	20	0
Reinforced Concrete Pier Cap	linear ft.	36	36	0	0	0
Joints
Strip Seal Joint	linear ft.	78	78	0	0	0
Bearings
Movable Bearing	each	4	0	0	4	0
Fixed Bearing	each	4	4	0	0	0
Bridge Rail
Steel or Aluminum Bridge Rail	linear ft.	586	586	0	0	0