|Feature Type:||River - Watercourse of variable size, which has tributaries and flows into a body of water or a larger watercourse.|
Lookup the official name
||Flows NW into Nass River, just W of New Aiyansh, Cassiar Land District
||55°13'18"N, 129°06'24"W at the approximate mouth of this feature.
Origin Notes and History:
Tseax River adopted in the 1930 BC Gazetteer, as labelled on Geological Survey map 69A, Route map of part of the Nass River, 1912, from the 1893 surveys of J.McEvoy, and as labelled on BC map 1H, 1917; confirmed 4 November 1948 on 103/ NE and 4 October 1951 on 103I. Form of name changed to Ksi Sii Aks per Nisga'a Treaty, Appendix F-3, effective 11 May 2000.
Source: BC place name cards, or correspondence to/from BC's Chief Geographer or BC Geographical Names Office