DHM Downloads for USGS Water-Resources Investigations Report 87-4137:
In order to run the DHM21.EXE file below, you must first download the DHM21.DAT file to your desktop, followed by the DHM21.EXE file. In order to download the DHM21.DAT file to your desktop, right click, or option click the DHM21.DAT link.
(Mac users: control click.) Mac users should also note that an EXE file can only run on a PC platform, or with the use of virtual PC software. To download the DHM21.EXE file below to your desktop, simply click on the link below. DHM21.DAT is for Application 7 on Page 73 of the USGS Report.