FILENAME: STL_WDAMS

DOCUMENTATION DATE: JANUARY 25, 1995

DATA THEME: WING DAMS

DESCRIPTION: Wing Dam centerlines as arcs.

ABSTRACT: This coverage contains arcs representing the wing dams on the Mississippi
River starting at river mile 0, at Cairo, Il, to river mile 300, at the border
between the St. Louis District and the Rock Island District. Each arc represents
the centerline of the wing dam as detailed on the 1 inch = 400 feet scale
hydrographic survey sheets maintained by the St. Louis District. 

STATUS: 90% done

GEOGRAPHIC AREA: Mississippi River, St. Louis District.

MAP PROJECTIONS: Universal Transversal Mercator (UTM) zone 15.

MAP UNITS: meters

DATUM: NAD27

SOFTWARE VERSION: ARC/INFO v. 6.1.1 Sun Sparkstation

INTENDED USE OF DATA: This data was designed to be used as a means to locate wing
dams in the St. Louis District and to be able to quickly access information
pertaining to that wing dam.

LIMITATIONS OF DATA: The levee centerlines were digitized off of USACE St. Louis 
District Hydrographic Survey Sheets (scale 1 inch = 400 feet). The accuracy is 
estimated to be within 15 feet of its true location.

COVERAGE DEVELOPER: U.S. Army Corps of Engineers, Rock Island District

CORPS CONTACT: Thomas DeWitte, US Army Corps of Engineers, Rock Island District,
Operations Division, Clock Tower Building, P.O. Box 2004, Rock Island, IL 61204-2004.
Phone # (309) 794-5674.

ORIGINAL SOURCE INFORMATION: 
	MEDIA: Paper copy of map.
	AUTHOR/AGENCY: U.S. Army Corps of Engineers
	PUBLISHED DATE(S): Hydrographic photo 31 January 1989
	SCALE: 1:4800
	PROJECTION: Missouri East Stateplane

PROCEDURE USED TO CREATE THE DATA:.  Wing Dam centerlines were digitized on an
ALTEK digitizing table using the software ARC/INFO.  ARC/INFO software was then
used to project the digitized stateplane coordinate coverage to UTM zone 15
coordinates.
	
COMMENTS: None

ARC Attribute File Items (AAT)

DIKE_NO.	This gives the river mile (with river mile 0 at the point where the 
		Ohio and Mississippi rivers meet) plus the side of the river that
		the wing dam is located.  (L for left hand side, R for right hand
		side while facing downstream).

RIVER_MILE	This is the distance in miles from the origin where the Ohio and
 		Mississippi Rivers meet.

NOTICE:  The U.S. Army Corps of Engineers assumes no responsibility for errors in
the information.  Similarly the U.S. Army Corps of Engineers assumes no responsibility
for the consequences of inappropriate uses or interpretations of the data made by anyone
to whom this data has been made available.  The Corps bears no responsibility to inform
users of any changes made to this data.  Anyone using this data is advised that precision
implied by the coverage may far exceed actual precision.  Comments on this data are
invited and the Corps would appreciate that documented errors be brought to staff attention.