ODFW AQUATIC INVENTORY PROJECT STREAM REPORT STREAM: Hardy Creek Tributary 2 LLID: none BASIN: Long Tom River HUC NUMBER: 17090003 DATES: September 18-19, 2012 SURVEY CREW: Frank Zomer, Maya Rommwatt, Lora Tennant, Jackie Hancock, Peggy Kavanagh REPORT PREPARED BY: Peggy Kavanagh USGS MAPS: Noti ECOREGION: Willamette Valley Plain and Foothills BASIN AREA: 1.39km 2 FIRST ORDER TRIBUTARIES: 3 STREAM ORDER: 2 GENERAL DESCRIPTION: The Hardy Creek Tributary 2 habitat survey began at the confluence of Hardy Creek and ended approximately 693 meters upstream. Three reaches were designated based on changes land use and surveyor composition. Constraining high terraces characterized the valley. The land uses were timber harvest, young trees (3-15cm dbh), second-growth timber (15-30cm dbh), and large timber (30-50cm dbh). The stream habitat was composed mostly of scour pool and riffles. The substrate was primarily gravel and fine sediment. The trees observed most frequently in the riparian transect were hardwoods 3-15cm dbh. Conifer and hardwood trees in all size classes (3-90cm dbh) were recorded. Large wood volume ranged from 10.7-19.5m 3 /100m. REACH DESCRIPTIONS: Reach 1: (T18S-R06W-S17NE) Length 214 meters. Reach 1 began at the junction with Hardy Creek and ended approximately 30 meters downstream from a tributary junction. The reach ended due to a change in the crew composition. The stream channel was constrained by terraces in a broad valley. The average valley width index was 13.7 (range: 7.0-20.0). The land use was large timber. The average gradient was 1.6 percent. Scour pool (65%) was the dominant stream habitat. The substrate was mostly sand (39%) and gravel (44%). Eighty- five percent of the reach had actively eroding banks. The average residual pool depth was 0.24 meters. The trees found in the riparian zone were hardwoods 30-50cm and conifers 30-90cm dbh (based on two riparian transects). Large wood volume was 16.3m 3 /100m. Reach 2: (T18S-R06W-S17NE) Length 241 meters. Reach 2 extended to a land use change. The stream channel was constrained by alternating hillslopes and terraces in a broad valley. The average valley width index was 13.6 (range: 3.0-20.0). There were 16 meters of secondary channel habitat. The land uses were second-growth timber and large timber. The average gradient was 5.9 percent. Scour pool (62%) dominated the stream habitat. The substrate was mostly gravel (62%) and fine sediment (30%). Thirty-eight percent of the reach length had actively eroding banks. The average residual pool depth was 0.18 meters. The trees found most frequently in the riparian zone were hardwoods 3-15cm dbh (based on two riparian transects). Conifers and hardwoods 3-90cm dbh were present. Large wood volume was 19.5m 3 /100m.
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ODFW AQUATIC INVENTORY PROJECT STREAM REPORT … · 0.24 meters. The trees found in the riparian zone were hardwoods 30-50cm and conifers 30-90cm dbh (based on two riparian transects).
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ODFW AQUATIC INVENTORY PROJECT STREAM REPORT
STREAM: Hardy Creek Tributary 2 LLID: none BASIN: Long Tom River HUC NUMBER: 17090003 DATES: September 18-19, 2012 SURVEY CREW: Frank Zomer, Maya Rommwatt, Lora Tennant, Jackie Hancock, Peggy Kavanagh REPORT PREPARED BY: Peggy Kavanagh USGS MAPS: Noti ECOREGION: Willamette Valley Plain and Foothills BASIN AREA: 1.39km2 FIRST ORDER TRIBUTARIES: 3 STREAM ORDER: 2 GENERAL DESCRIPTION: The Hardy Creek Tributary 2 habitat survey began at the confluence of Hardy Creek and ended approximately 693 meters upstream. Three reaches were designated based on changes land use and surveyor composition. Constraining high terraces characterized the valley. The land uses were timber harvest, young trees (3-15cm dbh), second-growth timber (15-30cm dbh), and large timber (30-50cm dbh). The stream habitat was composed mostly of scour pool and riffles. The substrate was primarily gravel and fine sediment. The trees observed most frequently in the riparian transect were hardwoods 3-15cm dbh. Conifer and hardwood trees in all size classes (3-90cm dbh) were recorded. Large wood volume ranged from 10.7-19.5m3/100m. REACH DESCRIPTIONS: Reach 1: (T18S-R06W-S17NE) Length 214 meters. Reach 1 began at the junction with Hardy Creek
and ended approximately 30 meters downstream from a tributary junction. The reach ended due to a change in the crew composition. The stream channel was constrained by terraces in a broad valley. The average valley width index was 13.7 (range: 7.0-20.0). The land use was large timber. The average gradient was 1.6 percent. Scour pool (65%) was the dominant stream habitat. The substrate was mostly sand (39%) and gravel (44%). Eighty-five percent of the reach had actively eroding banks. The average residual pool depth was 0.24 meters. The trees found in the riparian zone were hardwoods 30-50cm and conifers 30-90cm dbh (based on two riparian transects). Large wood volume was 16.3m3/100m.
Reach 2: (T18S-R06W-S17NE) Length 241 meters. Reach 2 extended to a land use change. The
stream channel was constrained by alternating hillslopes and terraces in a broad valley. The average valley width index was 13.6 (range: 3.0-20.0). There were 16 meters of secondary channel habitat. The land uses were second-growth timber and large timber. The average gradient was 5.9 percent. Scour pool (62%) dominated the stream habitat. The substrate was mostly gravel (62%) and fine sediment (30%). Thirty-eight percent of the reach length had actively eroding banks. The average residual pool depth was 0.18 meters. The trees found most frequently in the riparian zone were hardwoods 3-15cm dbh (based on two riparian transects). Conifers and hardwoods 3-90cm dbh were present. Large wood volume was 19.5m3/100m.
Reach 3: (T18S-R06W-S16NW) Length 238 meters. Reach 3 began at a change in land use and ended due to dry stream bed and evidence of bear. The stream channel was constrained by alternating hillslopes and terraces in a broad valley. The average valley width index was 11.2 (range: 4.0-20.0). There were 14 meters of secondary channel habitat. The land uses were second-growth timber and young trees. The average gradient was 3.4 percent. The stream habitat was predominantly scour pool (82%). The substrate was a predominantly gravel (43%) with fine sediment (53%). Eleven percent of the reach length was actively eroding. The residual pool depth was 0.25 meters. The trees found most frequently in the riparian zone were conifers 30-50cm dbh (based on two riparian transects). Conifers and hardwoods 3-50cm dbh were observed. Large wood volume was 10.7m3/100m.
COMMENT SUMMARY
No fish were observed during the survey. A fish presence/absence survey was not conducted. No barriers were noted in the surveyed segment. Wildlife observations included beaver activity (chewed sticks – old and new), woodpecker, deer tracks, bird, Pacific giant salamander, kinglets, and bear, elk, and raccoon prints. Hardpan clay was noted during the survey, in the creek and on the adjacent landforms. See the Comment Summary for individual units with hardpan clay. Part of Reach 3 meandered through alder trees, and finding the channel was difficult. There were some dead conifers, old beaver activity. The upper part of the reach had the essence of a beaver pond reverting to stream channel.
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3MASS MOVEMENT
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PERCENT GRAVEL
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PERCENT BEDROCK OR HARDPAN CLAY
PLEASE SEE THE COMMENT SUMMARY FOR INDIIVIDUAL UNITS INDICATING HARDPAN CLAY OR BEDROCK SUBSTRATE
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NUMBER OF BOULDERS(running average per 100 m.)
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POOLS GREATER THAN OR EQUAL TO 0.5 METERS DEEP
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PIECES OF LARGE WOOD
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VOLUME OF LARGE WOOD(cubic meters)
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