I-81 SBL over ISLAND RD & MUMPOWER CK

Map

Coordinates:
+36.62141, -82.18937
36°37'17" N, 82°11'22" W

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

Name:	I-81 SBL over ISLAND RD & MUMPOWER CK
Structure number:	000000000020022
Location:	1.96 R 11 &3.58 TENN LINE
Purpose:	Carries highway over highway and waterway
Route classification:	Principal Arterial - Interstate (Rural) `[01]`
Length of largest span:	56.1 ft. `[17.1 m]`
Total length:	252.0 ft. `[76.8 m]`
Roadway width between curbs:	58.7 ft. `[17.9 m]`
Deck width edge-to-edge:	61.7 ft. `[18.8 m]`
Vertical clearance below bridge:	32.8 ft. `[10.0 m]`
Skew angle:	10°
Owner:	State Highway Agency `[01]`
Year built:	1961
Year reconstructed:	2001
Historic significance:	Bridge is not eligible for the National Register of Historic Places `[5]`
Design load:	MS 18+Mod / HS 20+Mod `[6]`
Number of main spans:	5
Main spans material:	Prestressed concrete `[5]`
Main spans design:	Box beam or girders - Multiple `[05]`
Deck type:	Concrete Cast-in-Place `[1]`
Wearing surface:	Latex Concrete or similar additive `[3]`

Good/Fair/Poor Condition:	Fair
Status:	Open, no restriction `[A]`
Average daily traffic:	18,605 `[as of 2014]`
Truck traffic:	20% 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:	Equal to present minimum criteria `[6]`
Deck geometry appraisal:	Superior to present desirable criteria `[9]`
Underclearances appraisal:	Meets minimum tolerable limits to be left in place as is `[4]`
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 the assessed or calculated scour condition. `[8]`
Sufficiency rating:	87.1
Recommended work:	Bridge rehabilitation because of general structure deterioration or inadequate strength. `[35]`
Estimated cost of work:	$98,000

Date	Condition	Deck	Superstructure	Substructure	ADT	Suff. Rating
June 2018	Fair	Good	Satisfactory	Satisfactory	18605	87.1
June 2016	Fair	Good	Satisfactory	Satisfactory	18605	88.9
November 2014	Fair	Good	Satisfactory	Fair	13000	79.3
June 2013	Poor	Poor	Satisfactory	Fair	13000	76.0
June 2011	Poor	Poor	Satisfactory	Satisfactory	13000	85.7
June 2009	Fair	Fair	Satisfactory	Satisfactory	13000	87.8
May 2007	Fair	Fair	Satisfactory	Satisfactory	13000	87.8
June 2005	Fair	Fair	Satisfactory	Satisfactory	13000	87.8
August 2003	Fair	Satisfactory	Satisfactory	Satisfactory	13000	88.9
June 2001	Fair	Satisfactory	Good	Satisfactory	13000	88.9
April 2000	Fair	Good	Satisfactory	Fair	13000	77.1
April 1998	Fair	Good	Satisfactory	Fair	13000	77.1
June 1996	Fair	Good	Satisfactory	Fair	13000	73.8
May 1994	Fair	Good	Good	Fair	13000	73.8
June 1992	Fair	Good	Good	Fair	9600	75.4
May 1990	Fair	Very Good	Very Good	Fair	9600	75.4

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

Element	Units	Quantity	1-Good	2-Fair	3-Poor	4-Serious
Superstructure
Prestressed Concrete Closed Web/Box Girder	linear ft.	4,750	4,737	7	6	0
Deck
Prestressed Concrete Top Flange	sq. ft.	15,541	15,530	0	11	0
Wearing Surfaces	sq. ft.	14,675	14,662	0	0	13
Substructure
Reinforced Concrete Column	each	8	6	2	0	0
Reinforced Concrete Pier Wall	linear ft.	49	43	6	0	0
Reinforced Concrete Abutment	linear ft.	162	142	19	1	0
Reinforced Concrete Pier Cap	linear ft.	253	219	34	0	0
Joints
Pourable Joint	linear ft.	370	362	0	0	8
Bridge Rail
Reinforced Concrete Bridge Rail	linear ft.	505	418	87	0	0