ODFW AQUATIC INVENTORY PROJECT STREAM REPORT STREAM: Boulder Creek LLID: 1220215453683 BASIN: Salmon River HUC NUMBER: 17080001 SURVEY DATES: September 24 - 25, 2012 SURVEY CREW: Alex Neerman / Tony Cardello REPORT PREPARED BY: Staci Stein STREAM ORDER: 2 BASIN AREA: 20 km 2 FIRST ORDER TRIBUTARIES: 4 USGS MAP: Wildcat Mtn ECOREGION: Western Cascades Northern GENERAL DESCRIPTION: The Boulder Creek habitat survey began at the confluence with the Salmon River and continued upstream 3513 meters. There were four reaches designated based on changes in land uses and stream gradient. The channel was constrained alternately by terraces and hillslopes within a broad valley. Land uses included rural residential, second growth timber (15-30cm dbh), large trees (30-50cm dbh) and mature trees (50-90cm dbh), and timber harvest. The stream substrates were predominately composed of boulder (39%), cobble (33%), and gravel (16%). The stream habitats were primarily rapids (69%) and scour pools (15%). Eight percent of the channel was dry habitat. Large wood volume ranged from 2.7-14.8m 3 /100m. The vegetation found most frequently in the riparian zones were hardwoods 3-15cm dbh (based on 6 riparian transects). Fish were observed throughout the survey. REACH DESCRIPTIONS: Reach 1: (T02SS-R06E-S25NW) Length 772 meters. Reach one began at the confluence with Salmon River. The channel was alternately constrained by terraces and hillslopes in a broad valley. The average valley width index was 3.5 (range: 3.0-4.0). There were 368 meters of secondary channel habitat. The land uses were rural residential and second growth timber. The average unit gradient was 3.8 percent. The stream substrate was primarily boulder (38%), cobble (35%), and gravel (17%). Stream habitats were rapids (55%) and scour pools (10%). Fifteen percent of the channel was dry habitat. There was no active bank erosion or undercut. The average residual pool depth was 0.43m. Large wood debris volume was 10.7m 3 /100m. No riparian transect was conducted in reach one. There was approximately 150 meters (18%) of stream habitat that was not surveyed due to denied property access. Reach 2: (T02S-R06E-S26SE) Length 924 meters. The channel was alternately constrained by terraces and hillslopes in a broad valley floor. The average valley width index was 2.8 (range: 2.0-3.0). There were 543 meters of secondary channel habitat. Land uses for the reach were second growth timber and large trees. The average unit gradient was 2.4 percent. Cobble (36%), boulder (36%), and gravel (17%) were the stream substrate. Stream habitats were rapids (75%) and scour pools (15%). Nine percent of the channel was dry habitat. There was no bank erosion or undercut observed. The average residual pool
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ODFW AQUATIC INVENTORY PROJECT
STREAM REPORT STREAM: Boulder Creek LLID: 1220215453683 BASIN: Salmon River HUC NUMBER: 17080001 SURVEY DATES: September 24 - 25, 2012 SURVEY CREW: Alex Neerman / Tony Cardello REPORT PREPARED BY: Staci Stein STREAM ORDER: 2 BASIN AREA: 20 km2 FIRST ORDER TRIBUTARIES: 4 USGS MAP: Wildcat Mtn ECOREGION: Western Cascades Northern GENERAL DESCRIPTION: The Boulder Creek habitat survey began at the confluence with the Salmon River and continued upstream 3513 meters. There were four reaches designated based on changes in land uses and stream gradient. The channel was constrained alternately by terraces and hillslopes within a broad valley. Land uses included rural residential, second growth timber (15-30cm dbh), large trees (30-50cm dbh) and mature trees (50-90cm dbh), and timber harvest. The stream substrates were predominately composed of boulder (39%), cobble (33%), and gravel (16%). The stream habitats were primarily rapids (69%) and scour pools (15%). Eight percent of the channel was dry habitat. Large wood volume ranged from 2.7-14.8m3/100m. The vegetation found most frequently in the riparian zones were hardwoods 3-15cm dbh (based on 6 riparian transects). Fish were observed throughout the survey. REACH DESCRIPTIONS: Reach 1: (T02SS-R06E-S25NW) Length 772 meters. Reach one began at the confluence with
Salmon River. The channel was alternately constrained by terraces and hillslopes in a broad valley. The average valley width index was 3.5 (range: 3.0-4.0). There were 368 meters of secondary channel habitat. The land uses were rural residential and second growth timber. The average unit gradient was 3.8 percent. The stream substrate was primarily boulder (38%), cobble (35%), and gravel (17%). Stream habitats were rapids (55%) and scour pools (10%). Fifteen percent of the channel was dry habitat. There was no active bank erosion or undercut. The average residual pool depth was 0.43m. Large wood debris volume was 10.7m3/100m. No riparian transect was conducted in reach one. There was approximately 150 meters (18%) of stream habitat that was not surveyed due to denied property access.
Reach 2: (T02S-R06E-S26SE) Length 924 meters. The channel was alternately constrained by
terraces and hillslopes in a broad valley floor. The average valley width index was 2.8 (range: 2.0-3.0). There were 543 meters of secondary channel habitat. Land uses for the reach were second growth timber and large trees. The average unit gradient was 2.4 percent. Cobble (36%), boulder (36%), and gravel (17%) were the stream substrate. Stream habitats were rapids (75%) and scour pools (15%). Nine percent of the channel was dry habitat. There was no bank erosion or undercut observed. The average residual pool
Boulder Creek (continued)
depth was 0.47m. Large wood debris volume was 5.5m3/100m. The trees found most frequently in the riparian zones were hardwoods 3-30cm dbh (based on 3 riparian transects).
Reach 3: (T02SS-R06E-S36NW) Length 889 meters. The channel was alternately constrained by
terraces and hillslopes within a broad valley. The average valley width index was 2.0 (range: 1.0-3.0). The land uses were second growth timber and large trees. The average unit gradient was 6.4 percent. The stream substrate was primarily boulder (37%), cobble (33%), and gravel (15%). Stream habitats were rapids (80%) and scour pools (19%). There was no active bank erosion or undercut. The average residual pool depth was 0.54m. Large wood debris volume was 2.7m3/100m. No riparian transect was conducted in reach three.
Reach 4: (T02SS-R06E-S36SW) Length 928 meters. The channel was alternately constrained by
terraces and hillslopes in a broad valley. The average valley width index was 3.3 (range: 3.0-5.0). There were 259 meters of secondary channel habitat. The land uses were timber harvest and mature trees. The average unit gradient was 6.9 percent. The stream substrate was boulder (41%), cobble (31%), and gravel (15%). Wetted stream habitats were rapids (68%) and scour pools (18%). Nine percent of the channel was dry habitat. There was no active bank erosion or undercut. The average residual pool depth was 0.48m. Large wood debris volume was 14.8m3/100m. The trees found most frequently in the riparian zones were hardwoods 3-15cm dbh and conifers 3-50cm dbh (based on 3 riparian transects).
COMMENTS: The crew observed salmonid fry, coho, and cutthroat trout. Fish were noted in every reach and fry
were abundant in pools. Salamander, Pacific giant salamander, and crayfish were noted during the survey.
There were numerous large, woody, debris jams throughout the surveyed stream.
There was an OASIS spawning survey sign at unit 55, 1600m.
The crew did not survey approximately 150m of stream (u23, 498m) due to denied access on private property.
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OREGON DEPARTMENT OF FISH AND WILDLIFE
HABITAT INVENTORY Survey Date: 9/24/2012Report Date: 2/1/2013BOULDER CREEK