Marmot Dam Removed

In 1906 the Marmot Dam was built on the Sandy River near Mount Hood. Nearly a century later, PGE decides to remove it. But will the tons of sediment built up behind the dam harm the river downstream once the structure is removed? The National Center For Earth Dynamics at the University of Minnesota and other experts weigh in. See what happens as the Marmot Dam is removed.

First Broadcast: 2008
Producer: Vince Patton
Videographers: Todd Sonflieth, Nick Fisher
Editor: Nick Fisher
Audio: William Ward
Field Producer: Milt Ritter
Video courtesy of: Portland General Electric
Photos Courtesy of : US Geological Survey

Appeared in episode:  Marmot Dam Removed, Fire Tower, Ice Worms

Video Extra: Time Lapse Video: Coffer Dam Face

Source: OPB: Oregon Field Guide

Power for generations

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Power for generations

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tools-1994Pacific Power’s Bend hydroelectric project on the Deschutes river generates one megawatt of electricity  only enough power for about 500 homes. But the 80-year-old dam can still evoke powerful memories.

Source: The Bulletin ©1994

Float Site Cleared

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Some of the silt covering the shoreline of Pageant Park was removed late Monday through spray from a fire department hose. It is in this area that Mirror Pond floats are launched. The accumulation of soil reached the point where some floats scraped bottom. Work of improving the float launching area on the Deschutes was undertaken while the level of the Mirror Pond was low. Today, the Deschutes coursed through the Mirror Pond basin as a swift, rapidly clearing stream.

Source: The Bend Bulletin ©1957

Mud Flats Appear

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When water was drained from the Mirror Pond early this morning, ugly mud flats took shape in the big basin, with waterfowl feasting on crawdads. This is a view upstream showing the extensive mud flats in the cove that fronts on Drake Park near the band stand. This is one of the most extensive areas of siltation in the pond. (Bend Bulletin Photo)