Preliminary Survey of the Entrance to Umquah River Oregon

Detailed chart of the Entrance to Umquah River, Oregon. This chart has numerous depth soundings and isolines to show the bathymetry of the river channel. Also depicted is some great shorline topographical detail. Sailing directoins and explanatory notes are also given.

IMPORTANT NOTE:

All of our United States Coast Survey (USCS), United States Coast & Geodetic Survey (USC&GS), and similar maps and charts have been professionally unfolded and flattened using humidity baths, semi-permeable membrane, and drying blotter techniques. Most others you typically see on eBay have not been, and worse, are quickly and crudely unfolded for the low-quality photos you see. Unfolding these maps in that way is damaging and weakens them. Please be aware.