
Lake Umatilla dominates the northern landscape of this 1993 edition, where the Columbia River serves as the boundary between Benton and Morrow counties. The city of Boardman serves as the central hub, showing significant infrastructure including the Port of Morrow and a Filtration Plant. South of the residential core, the landscape transitions from irrigated agricultural plots near the West Extension Irrigation Canal to the expansive Naval Weapons Systems Training Facility, which occupies the southern half of the quadrangle. For those tracing local heritage, the Riverview Cem is located near the riverfront, and the Union Pacific railroad corridor tracks through Messner and Boardman Junction. The map also preserves the northern ecological setting of the Umatilla National Wildlife Refuge, featuring several island formations such as Whitcomb Island situated within the river's North Channel.
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This is the sole edition of this map. No revisions or reprints were ever made.
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