LA0070 over MISSISSIPPI RIVER

Map

Coordinates:
+30.09622, -90.92200
30°05'46" N, 90°55'19" W

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

Name:	LA0070 over MISSISSIPPI RIVER
Structure number:	614704260200721
Location:	LA0070
Purpose:	Carries highway over highway, waterway, and railroad
Route classification:	Other Principal Arterial (Urban) `[14]`
Length of largest span:	825.2 ft. `[251.5 m]`
Total length:	9102.5 ft. `[2774.3 m]`
Roadway width between curbs:	56.1 ft. `[17.1 m]`
Deck width edge-to-edge:	56.8 ft. `[17.3 m]`
Vertical clearance above deck:	15.7 ft. `[4.8 m]`
Vertical clearance below bridge:	131.2 ft. `[40.0 m]`
Owner:	State Highway Agency `[01]`
Year built:	1963
Year reconstructed:	2004
Historic significance:	Bridge is eligible for the National Register of Historic Places `[2]`
Design load:	MS 18 / HS 20 `[5]`
Number of main spans:	48
Main spans material:	Steel `[3]`
Main spans design:	Truss - Thru `[10]`
Deck type:	Concrete Cast-in-Place `[1]`
Wearing surface:	Bituminous `[6]`

Good/Fair/Poor Condition:	Fair
Status:	Open, no restriction `[A]`
Average daily traffic:	16,900 `[as of 2015]`
Truck traffic:	9% of total traffic
Deck condition:	Satisfactory `[6 out of 9]`
Superstructure condition:	Fair `[5 out of 9]`
Substructure condition:	Fair `[5 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]`
Underclearances appraisal:	Equal to present minimum criteria `[6]`
Water adequacy appraisal:	Equal to present desirable criteria `[8]`
Roadway alignment appraisal:	Equal to present desirable criteria `[8]`
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:	Countermeasures have been installed to mitigate an existing problem with scour. `[7]`
Sufficiency rating:	41.8
Recommended work:	Replacement of bridge or other structure because of substandard load carrying capacity or substantial bridge roadway geometry. `[31]`
Estimated cost of work:	$49,696,000

Date	Condition	Deck	Superstructure	Substructure	ADT	Suff. Rating
March 2017	Fair	Satisfactory	Fair	Fair	16900	41.8
March 2015	Poor	Satisfactory	Poor	Fair	16900	36.8
March 2013	Poor	Satisfactory	Poor	Fair	16700	36.8
July 2011	Poor	Satisfactory	Poor	Fair	16200	48.9
January 2010	Fair	Good	Fair	Satisfactory	15900	53.9
May 2007	Fair	Good	Satisfactory	Satisfactory	15400	64.9
May 2005	Fair	Very Good	Satisfactory	Satisfactory	16500	51.9
May 2003	Fair	Satisfactory	Satisfactory	Satisfactory	16000	63.9
May 2001	Fair	Satisfactory	Satisfactory	Satisfactory	14271	63.9
May 1999	Fair	Good	Satisfactory	Good	14271	61.9
July 1997	Fair	Good	Satisfactory	Good	14010	61.9
July 1995	Fair	Good	Satisfactory	Good	12813	61.9
November 1993	Fair	Good	Satisfactory	Good	7071	61.9
November 1991	Fair	Good	Satisfactory	Good	9581	61.9

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.	44,800	0	31,701	12,955	144
Steel Protective Coating	sq. ft.	2,463,450	0	2,450,351	0	13,099
Steel Stringer	linear ft.	36,770	36,757	7	6	0
Steel Protective Coating	sq. ft.	2,022,433	0	2,022,432	0	1
Deck
Reinforced Concrete Deck	sq. ft.	523,764	21,760	499,129	2,875	0
Superstructure
Steel Truss	linear ft.	11,013	8,937	664	1,412	0
Steel Protective Coating	sq. ft.	4	0	0	4	0
Steel Floor Beam	linear ft.	6,440	6,318	0	122	0
Steel Protective Coating	sq. ft.	191,811	0	191,689	0	122
Steel Gusset Plate	each	840	647	121	72	0
Steel Protective Coating	sq. ft.	228,188	0	228,116	0	72
Substructure
Reinforced Concrete Column	each	2	2	0	0	0
Steel Column Tower/Trestle	linear ft.	1,704	1,563	0	77	64
Steel Protective Coating	sq. ft.	161,150	0	161,040	0	110
Reinforced Concrete Pier Wall	linear ft.	453	45	408	0	0
Reinforced Concrete Abutment	linear ft.	206	88	101	17	0
Reinforced Concrete Pile Cap/Footing	linear ft.	630	629	0	1	0
Steel Pier Cap	linear ft.	3,300	2,578	660	0	62
Steel Protective Coating	sq. ft.	239,814	0	239,632	120	62
Reinforced Concrete Pier Cap	linear ft.	60	58	0	2	0
Joints
Compression Joint	linear ft.	1,398	64	694	640	0
Open Joint	linear ft.	911	903	0	8	0
Assembly without Seal Joint	linear ft.	500	452	22	26	0
Bearings
Movable Bearing	each	295	14	265	16	0
Steel Protective Coating	sq. ft.	10,906	3,404	7,491	0	11
Fixed Bearing	each	449	449	0	0	0
Steel Protective Coating	sq. ft.	25,325	25,325	0	0	0
Bridge Rail
Reinforced Concrete Bridge Rail	linear ft.	24,849	23,353	1,481	15	0