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PROJECT DESCRIPTION:
The 2003 Lower Austin Creek Migration Improvement Project will incorporate adapted management techniques in location
listed below as directed by National Oceanic and Atmospheric Administration (NOAA)
as well as California Department of Fish and Game (DFG)
utilizing log and boulder structures to enhance pools and maintain scour. Boulder j-hook structures will also be installed
to recruit and sort spawning gravel and provide pool habitat. These structures will encourage mid-channel scour and
discourage lateral bank erosion within the improved zone. Digger log structures will be utilized where banks are stable
to create lateral scour and enhance backwater pools for rearing fish.
Restoration work will be conducted at eleven (11) specific locations; Site 1; (backwater #1) will consist of a two
digger/cover log structure (35-40’ logs) associated with root mass anchored to a several large redwoods; Site 2
(pool #2) will consist of a single 40’ log digger anchored to large redwoods; Sites 3-5 (pools 5-7) will consist of
j-hook combined log/boulder structures (40’ logs associated with twelve 4’ boulders keyed into the bank at least 5’);
Site 6 and 7 will consist of multiple digger log structures (20-30’ logs) anchored to a large alders and fir, with a
large placed buried boulder (6-8’ and anchored to logs) in the pool; Site 8 will be a large deflector at the base of
the county bridge (30-40 tons of angular rip rap) to continue the meander wave developed from upstream pools; site 9
will consist of 5 barbs (20 tons each of angular rock) jutting out from the bank at an angle of 30 degrees where
significant erosion is occurring to turn and define the low flow away from the bank.
Where sites require logs and boulders to be trenched into the toe of the bank, all disturbed areas mulched and inter-planted
with willows. All work except for the revegetation shall take place during the summer and fall low flow period and shall
be completed before the first significant seasonal rainfall. Planting of seedlings will take place after December 1 or
when sufficient rainfall has occurred to insure the best chance of survival of the seedlings, but in no case later than
March 1. Maintenance will include re-excavating pools to a depth that provides perennial pools. The landowner has
developed, and agreed to a (DFG) and (NOAA) management plan for the project area. All methods employed will follow the
recommendations and procedures outlined in the second edition of the California Salmonid Stream Habitat Restoration
Manual. A detailed project plan will be provided to the equipment operator and the (CCC) crew supervisor prior to site
installation. The proposed sites are flagged in the field to indicate proper location. All instream structures will be
securely anchored to insure proper function and longevity. Any land disturbed by enhancement activities will be reseeded
or planted with species indigenous to the area.
Coordinated by:
TU California
David Katz
707.543.5877
With the Cooperation of::
National Oceanic & Atmospheric Administration
David Hines
707.575.6098
California Department of Fish & Game
Bob Coey
707.944.5582
California Conservation Corps
Elliott Doss
707.744.8112
Sonoma County Water Agency
Ronald Benkerk
707.547.1905
Bohan & Canelis Aggregates
Homer Canelis
707.632.5296
Links to Related Information:
Sonoma County Water Agency Fishery Enhancement Program
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