surveyed by L.A. Sengteller, Assistant, in 1883. Relief shown by hachures, form lines, and spot heights. Depths shown by soundings and isolines. Original chart "no. 639." Renumbered chart no. "6022" by stamp. Attachment placed over upper left area of map: "Re-survey of Siuslaw River Entrance by Capt. W. Young, Corps of Engrs., U. S. A., in July, 1889."