Text / Characterization of Grain Sizes in the Reservoir Impoundment Behind Marmot Dam Post-Dam ...

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Item Information.

Title
Characterization of Grain Sizes in the Reservoir Impoundment Behind Marmot Dam Post-Dam Removal.
Creator
Diana Di Leonardo
Date Created and/or Issued
6/29/09
Contributing Institution
UC Riverside, Library, Water Resources Collections and Archives
Collection
Clearinghouse for Dam Removal Information (CDRI)
Rights Information
Copyrighted
Transmission or reproduction of materials protected by copyright beyond that allowed by fair use requires the written permission of the copyright owners. Works not in the public domain cannot be commercially exploited without permission of the copyright owner. Responsibility for any use rests exclusively with the user.
Description
Scope/Content: Abstract: Marmot Dam was built in 1913 and stood until 2007 to divert water from the Sandy River to the Bull Run Hydroelectric Plant. During that time Marmot Dam impounded a reservoir deposit of approximately 750,000 m3 of sediment. Prior to dam removal Squier Associates completed a series of sediment cores and bulk samples to estimate the composition of the deposit (Stillwater 2000). Since 2007 the Sandy River has carved a path through the reservoir leaving vertical sections of the deposit exposed. This study aims to use these remains of the deposit to make another estimate of its composition using pebble counts and a bulk sample. It serves as a back of the envelope double check of the Squier Associates study and an experiment with a new sampling method. Our results suggest that the deposit may be coarser than previously thought.
Scope/Content: Dam type: concrete
Scope/Content: Height: 30 feet. Length: 4690 feet.
Scope/Content: Date constructed: 1913. Date removed: 2007.
Type
text
Identifier
ark:/86086/n2pc320x
1211
Language
eng
Subject
Sediment and channel dynamics
Dams
Dam retirement
Place
Sandy River, OR
Marmot Dam

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