Draft Final Report Acwa-08-05 - Continuation Of Lower Nushagak River Fecal Coliform And Water Quality Assessment - Alaska Department Of Environmental Conservation - 2008 Page 5
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23DRAFT Final Report ACWA-08-05
8 October 2008
these resources. BBNA has been conducting an instream flow reservation project on the Koktuli River,
and are planning to begin another one on the Stuyahok River in the fall of 2008.
This study builds on work that was conducted through BBNA and the Alaska Soil and Water Conservation
District (ASWCD) in 2006 and 2007. That study looked at fecal coliform concentrations and other basic
water quality parameters at eight sites in the Lower Nushagak River. Three of those sites showed
periodic elevated levels of fecal coliform bacteria in the river and are the foci of this study.
Study Area
The lower Nushagak River winds its way through the Bristol Bay Lowlands ecoregion before emptying
into Bristol Bay at Dillingham, Alaska. The 4780 square mile basin of the lower Nushagak River has a
predominantly maritime climate, but is influenced by the continental climate further inland. The
average annual precipitation is 20-35 inches and average summer temperatures range from 37-66
degrees Fahrenheit; average winter temperatures range from 4 to 30 degrees.
The NMWC has identified the lower Nushagak River its highest priority sub-basin due to its heavy use,
both by local residents and recreational visitors. This is the part of the larger watershed that is home to
the five communities on the river: Koliganek, New Stuyahok, Ekwok, Portage Creek, and Dillingham.
This study focuses on three locations in the lower Nushagak River that have had episodic elevated fecal
coliform levels: near the community of Koliganek, at the confluence with the Mulchatna River, and near
the community of New Stuyahok (Figure 1).
Figure 1.
The three main study sites on the Lower
Nushagak River.
Figure 2.
Sampling locations at study site LNR3
near New
Stuyahok.
Page 5
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