SUPPLIES AND EQUIPMENT - Well-numbering grid



               UNITED STATES DEPARTMENT OF THE INTERIOR
                          GEOLOGICAL SURVEY
                      WATER RESOURCES DIVISION
                         WASHINGTON 25, D. C.

                                                  July 13, 1964
                                                 Code 4056 0001

GROUND WATER BRANCH MEMORANDUM NO. 65.1

To:       District Chiefs and Staff Officials

From:     Chief, Ground Water Branch

Subject:  SUPPLIES AND EQUIPMENT - Well-numbering grid

Attached is an interpolation grid for the determination of
latitude-longitude well code numbers for use with 1:250,000 scale
maps.  Instructions attached to Ground Water Branch Memorandum
64.26, describing the use of grids for 7 1/2 and 15 minute
quadrangle maps, are also applicable to the use of this grid.



                                   (s) A. H. Lang
                                   for O. M. Hackett

WRD Distribution:  S3, FO3, SL (with enclosure
                    AB (without enclosure)