SUPPLIES AND EQUIPMENT--Well-location grid.


             UNITED STATES DEPARTMENT OF THE INTERIOR
                        GEOLOGICAL SURVEY
                  National Center, Mail Stop 411
                    12202 Sunrise Valley Drive
                     Reston, Virginia  22092

                                        2 copies--Code A
                                        Regional Hydrologist - CR
                                        Lakewood, CO

                                                      GW Branch

                                              December 10, 1973
                                                Code: 4351 5016

GROUND WATER BRANCH TECHNICAL MEMORANDUM NO. 74.07

Subject:  SUPPLIES AND EQUIPMENT--Well-location grid.

Enclosed are copies of three interpolation grids that have proved
useful in determining latitude and longitude of wells and springs.
The grids are applicable to 7-1/2 minute, 15-minute, and 1:250,000
quadrangle maps, and may be employed to determine latitude and
longitude of any mapped points, including gaging stations, Water
Quality stations, etc.

Use of these grids was described in a short paper entitled "A
well-numbering grid" by E. J. McClelland and J. S. Bader, in the
WRD Bulletin for May 1964.  An exerpt (sic) from that paper is
attached.

Limited additional supplies of the grids are available upon
request.



                              (s) Claud H. Baker Jr.
                              for Gerald Meyer
                              Chief, Ground Water Branch
                              Water Resources Division

Attachments

WRD Distribution:  A, B, S (w/o attach.), FO-L, PO (w/attach.)