2000
CALIFORNIA DEPARTMENT OF FISH AND GAME
STREAM INVENTORY REPORT
Purrington Creek
Atascadero Creek and Green Valley Creek Subwatershed
Russian River
INTRODUCTION
A stream inventory was conducted during the summer of 1994 on Purrington Creek to assess habitat conditions for anadromous salmonids. The inventory was conducted in two parts: habitat inventory and biological inventory. The objective of the habitat inventory was to document the amount and condition of available habitat to fish, and other aquatic species with an emphasis on anadromous salmonids in Purrington Creek. The objective of the biological inventory was to document the salmonid and other aquatic species present and their distribution. After analysis of historical information and data gathered recently, stream restoration and enhancement recommendations are presented.
WATERSHED OVERVIEW
Purrington Creek is tributary to
Green Valley Creek, tributary to the Russian River, located in Sonoma
County, California (Figure 1). Purrington Creek's legal description
at the confluence with Green Valley Creek is T 07N R 09W S 19. Its
location is 38°26'14" N. latitude and 122°53'20" W.
longitude. Purrington Creek is a first order stream and has
approximately 3.3 miles of blue line stream, according to the USGS
Camp Meeker 7.5 minute quadrangle. Purrington Creek drains a
watershed of approximately 3.7 square miles. Summer base runoff is
approximately 0.05 cfs at the mouth. Elevations range from about 110
feet at the mouth of the creek to 700 feet in the headwater areas.
Vehicle access to Purrington exists via Graton Rd off Highway 116
near the town of Sebastopol. Foot access is available from Graton
Road via several bridge crossings on Graton Rd. The entire stream
runs through private property.
The headwaters of Purrington Creek are located in a steep, narrow
canyon that widens into a narrow valley. Vegetation in the watershed
includes redwood, maple, alder, bay and oak, with apple orchards and
vineyard primarily in the lower drainage area. The stream flows
southwest to northeast draining an area of 3 square miles. The stream
channel is deeply incised throughout, and has fair canopy cover. An
important tributary to Purrington Creek is an unnamed eastern
tributary (commonly referred to as Sturgeon Creek) which provides
limited spawning and rearing habitat and enters Purrington at 1 mile
upstream from the mouth.
Purrington Creek is an important tributary to Green Valley Creek by contributing summer flow, and as spawning/nursery habitat for coho salmon and steelhead trout. A detailed description of the Green Valley Creek watershed is available in the parent stream report.
STREAM SURVEYS:
One DFG stream habitat survey has been conducted, in July 1969, covering the entire stream. A summary of that general survey description follows:
Many log jams and barriers were observed with several noted as
potential problems. Falls and chutes in the headwaters form the upper
fish limit. There were six temporary diversion dams observed in the
stream, ranging from 3' to 5' in height. A 4' dam prevented any
downstream smolt migration because of a screen covering the outlet.
Seventeen diversions were also observed for domestic and agriculture
use. Most diversions were noted as year round, while a few for summer
irrigation only. There were three springs observed, all approximately
2 miles upstream of confluence with Green Valley Creek, with some
seepage observed at various locations.
Improvements observed included some rock retaining walls where stream was in close proximity to private residences. Recommendations for management of Purrington Creek were that of steelhead and coho salmon habitat, with the proposed removal of log jams.
A fish improvement project was implemented on Purrington Creek in June 1986, upstream of the confluence with Green Valley Creek. The intent was to clear/remove two debris jams to benefit fish passage, and to open five miles of stream. Severe bank erosion had occurred bringing down large alder trees in to creek.
At the time of the survey Purrington Creek was estimated to support runs of coho salmon and steelhead, and provide good nursery habitat with year-round flow, though the small quantity of spawning gravel available appeared to be a limiting factor to fish production.
METHODS
The recent habitat inventory conducted in Purrington Creek follows the methodology presented in the California Salmonid Stream Habitat Restoration Manual (Flosi and Reynolds, 1991). The California Conservation Corps (CCC) seasonal Technical Advisors that conducted the inventory were trained in standardized habitat inventory methods by the California Department of Fish and Game (DFG) and CCC in May 1994. This inventory was conducted by a two person team, under the supervision of Bob Coey DFG's Russian River Basin Planner.
+FOR DETAILED DISCUSSION OF HABITAT INVENTORY COMPONENTS SEE PARENT STREAM REPORT (PRELIMINARY GREEN VALLEY STREAM INVENTORY REPORT)
BIOLOGICAL INVENTORY
Biological sampling during stream inventory is used to determine fish species and their distribution in the stream. Biological inventory is conducted using one or more of three basic methods: 1) stream bank observation, 2) underwater observation, 3) electrofishing. These sampling techniques are discussed in the California Salmonid Stream Habitat Restoration Manual.
DATA ANALYSIS
+FOR DETAILED DISCUSSION OF DATA
ANALYSIS SEE PARENT STREAM
REPORT
HABITAT INVENTORY RESULTS
* TABLES AND GRAPHS ARE LOCATED
AT THE END OF THE REPORT *
The habitat inventory of AUGUST 8 through November 18, 1994, was
conducted by Technical Advisors under the direction of DFG. The total
length of the stream surveyed was 19,559 feet.
Flow was measured at the bottom of the survey reach with a Marsh McBirney Model 2000 flowmeter at 0.05 cfs on Aug. 20, 1994. Water temperatures measured during the survey period (August 8 to November 18, 1994) by crew members with handheld thermometers ranged from 50 to 66 degrees fahrenheit. Air temperatures ranged from 50 to 82 degrees fahrenheit.
Purrington Creek (Figure 1) is a G1 channel type for the first 15,072 feet of stream reach surveyed (from the mouth to 500 feet above the second Graton Rd bridge). G1 channels are entrenched "gully" step-pool channels with low width/depth ratio on low to moderate gradients. The rest is a B2 channel type (Figure 1). They are usually stable because of the bedrock controlled channel, and this is a moderately entrenched, moderate gradient, riffle dominated channel, with infrequently spaced pools dominated by boulder substrate.
Table 1 summarizes the Level II riffle, flatwater, and pool habitat
types. By percent occurrence, RIFFLES made up 24%, FLATWATER
types 35%, and POOLS 40% (Graph 1). FLATWATER habitat types made up
46% of the total survey length, RIFFLES 25%, and POOLS 28%.
One percent of the survey length was DRY.
TWENTY Level IV habitat types were identified. The data are summarized in Table 2. The most frequent habitat types by percent occurrence were RUNS, 22%; LOW GRADIENT RIFFLES, 19%; GLIDES, 12%; and MID-CHANNEL POOLS, 10% (Graph 2). By percent total length, RUNS made up 35%, LOW GRADIENT RIFFLES 19%, and GLIDES 10%.
ONE HUNDRED AND THIRTY-SIX (136) POOLS were identified (Table 3). SCOUR POOLS were most often encountered at 64%, and comprised 46% of the total length of pools (Graph 3).
Table 4 is a summary of maximum pool depths by pool habitat types. Depth is an indicator of pool quality. FIFTY TWO of the 136 pools (38%) had a depth of two feet or greater.
The depth of cobble embeddedness was estimated at pool tail-outs. Of the 136 pool tail-outs measured, 51% of the pools in reach 1 had a embeddedness rating of 4; in reach 2, 45% were rated a 2. On this scale, a value of one is the best for fisheries.
A shelter rating was calculated for each habitat unit and expressed as a mean value for each habitat type within the survey using a scale of 0-300. POOL habitat types had the highest shelter rating at 18. FLATWATER and RIFFLE habitats followed with a rating of 6 for both (Table 1). Of the POOL types, the SCOUR POOLS had the highest mean shelter rating at 23, and BACKWATER POOLS rated 22 (Table 3).
Table 5 summarizes mean percent cover by habitat type. BOULDERS and UNDERCUT BANKS are the dominant cover type in Purrington Creek and are EXTENSIVE. LARGE AND SMALL WOODY DEBRIS are lacking in nearly all habitat types.
Table 6 summarizes the dominant substrate by habitat type. GRAVEL was the dominant substrate observed in 55 of the 64 low gradient riffles (86%).
Only TEN percent of the survey reach lacked shade canopy. Of the 90% of the stream covered with canopy, 82% was composed of deciduous trees (mainly willow, alder and bay), and 18% was composed of evergreen and coniferous trees (oaks, redwood and fir).
Table 2 summarizes the mean percentage of the right and left stream banks covered with vegetation by habitat type. For the stream reach surveyed, the mean percent right bank vegetated was 75%. The mean percent left bank vegetated was 77% (Appendix B). The dominant elements composing the structure of the stream banks consisted of 37% silt/clay, 31% cobble/gravel, 21% bedrock, and 10% boulders. Additionally, 82% of the banks were covered with deciduous trees, and 10% with coniferous trees, including downed trees, logs, and root wads (Appendix C).
Appendix A summarizes the creek by channel type for evaluation of data by reach.
BIOLOGICAL INVENTORY
HISTORICAL INFORMATION
Historical records reflect steelhead fingerlings were transferred into Green Valley Creek during a 1970 fish rescue operation from Dutch Bill Creek (tributary to the Russian River). In 1984, Green Valley and Atascadero Creeks (tributary to Green Valley) were stocked by Warm Springs Hatchery, Table 1.
Table 1. Summary of fish
hatchery-stocking/transfers/rescues
YEAR
SPECIES
SOURCE
#
SIZE
1970
SH
DUTCH BILL CRK
1,170
FING
1984
SH
WARM SPRINGS
15,400
FING
1984*
SH
WARM SPRINGS
15,400
FING
WARM SPRINGS = Warm Springs Hatchery (Geyserville)
SHD = Steelhead
1984* = Steelhead planted in Atascadero Creek
JUVENILE SURVEYS:
A DFG stream survey was conducted in July, 1969, covering the entire stream. A summary of that general survey description follows:
In August, 1992, Bill Cox, Department of Fish and Game, conducted an
exploratory electro-fishing survey on Purrington Creek to determine
general character of fish population. The survey was done at two
sites on the upper reach of the stream, approximately 0.5 and 0.8
miles west of the intersection of Graton road and Green Hill
Road.
The lower survey site was described as:
The upper site was described as:
RECENT INFORMATION
JUVENILE SURVEYS:
On Purrington Creek at various locations from the mouth to the headwaters single pass electrofishing was conducted. A summary of historical and recent data collected appears in the table below.
Summary of Salmonids found in Juvenile Surveys
YEAR
SPECIES
SOURCE
1969
SHD,SS
DFG
1992
SHD
DFG
1994
SHD,SS
DFG
SHD = Steelhead SS = Coho (Silver) Salmon
On 11/18/94, on the lower reach, observations began at habitat unit #1 of Purrington Creek. Between habitat unit #1 and #20, Sculpin, sixteen 0+ Steelhead, and two 1+ Steelhead were observed. Above the first private car bridge and seasonal dam,(between habitat unit #073 and #094), twelve 0+ Steelhead, one 1+ Steelhead, four 0+ Coho, Sculpin and Stickleback were observed. Also noted was that the flashboard dam was down.
On 11/07/94, on the upper reach of Purrington creek, electrofishing was conducted below and above a small log jam which is above the Graton road bridge, at habitat unit number 302. A total of nine 0+ Steelhead were observed. At unit number 303 a total of five 0+ Steelhead and one 1+ Steelhead were observed. Above the log jam three 0+ Steelhead and three 1+ Steelhead were observed. The jam is retaining significant amounts of gravel however it does not appear to be a barrier at this time. Garbage was observed in the creek and many paint and film processing buckets were found on the banks which had been dumped from Graton Road. This material would be spilled into the creek during rainfall events.
Electrofishing was continued on the first eastern unnamed tributary to Purrington Creek (commonly known as Sturgeon Creek) on 11/21/94. The inventory covered the creek 100' below the Green Hill road culvert and 100' above the culvert. Single pass electrofishing was the method used.
Below the culvert, one 1+ Steelhead, sculpin and crayfish were observed. Above the culvert Sculpin and two 1+ Steelhead were observed. The culvert appears to be impassable at high flows due to high energy.
ADULT SURVEYS:
A carcass/spawning survey was conducted February 8, 1995 on Purrington Creek. Our survey crew consisted of John Fort and Ken Mogan (AmeriCorp members). The survey began at the Graton Road bridge and continued downstream to the confluence of Green Valley Creek. Flow was estimated as 22 cfs. No carcass, redds or fish were observed on this survey. 100' below the Graton bridge a debris jam of both small and large woody debris (4'-7'H X 10'-15'W X 30'-40'L) was observed. The jam did not appear to be a barrier to migration. The gravel quality was visually estimated as fair.
DISCUSSION
In general, Reach 1 of Purrington Creek has poor spawning habitat but fair rearing habitat. Reach 2 has both fair spawning and rearing habitat.
The G1 channel type of Reach 1 is rated as fair for log cover, but poor for boulder clusters or bank cover. The B2 channel type of Reach 2 is rated as excellent for low and medium-stage plunge weirs, single and opposing wing deflectors, and bank cover.
The water temperatures recorded
on the survey days August 8 to November 18, 1994 ranged from 50°F
to 66°F. Air temperatures ranged from 50°F to 82°F. This
is a fairly good water temperature regime for salmonids, although
these warmer temperatures, are above the optimum levels. The warmer
water and air temperatures were recorded in the lower sections of the
survey reach. Our electrofishing samples found steelhead more
frequently in the cooler, shadier sample sites, and coho exclusively
there. Activities to increase canopy (especially in Reach 1) should
be encouraged.
Flatwater habitat types comprised 46% of the total length of
this survey, riffles 25%, and pools 28%. One percent of the survey
reach was dry. The pools are relatively shallow with only 52 of the
136 pools (38%) having a maximum depth greater than 2 feet. In first
and second order streams a primary pool is defined to have a maximum
depth of at least two feet, occupy at least half the width of the low
flow channel, and be as long as the low flow channel width. In
coastal coho and steelhead streams, it is generally desirable to have
primary pools comprise approximately 50% of total habitat. Therefore,
installing structures that will increase pool habitat is recommended
for locations where their installation will not jeopardize unstable
stream banks, or subject the structures to high stream energy, cause
streambank erosion, or conflict with possible modification of the log
debris accumulations (LDA's) in the stream.
The LDA's in the system serve an important function in retaining gravels, thus reducing channel incision, and in metering sediment and gravels out slowly during storm events to be used downstream by spawners. Normally LDA's do not prevent fish access, as fish can pass through, over or under (when LDA's float) during storm events. Modifications to the LDA's should only be done under extreme buildup when necessary to increase flood capacity, prevent bank erosion, or improving fish access. Metering gravels out to downstream reaches that will trap the gravel for future spawning use is desirable. If LDA modification becomes necessary, other gravel retention and sorting structures could be developed from the excess debris.
SEVENTY THREE PERCENT of the pool tail-outs measured in Reach 1 had embeddedness ratings of 3 or 4. FIFTY FIVE PERCENT of the pool tail-outs measured in Reach 2 had embeddedness ratings of 1 OR 2. Cobble embeddedness measured to be 25% or less, a rating of 1, is considered best for the needs of salmon and steelhead. In Reach 1 of Purrington Creek, sediment sources should be mapped and rated according to their potential sediment yields, and control measures taken.
Streamwide, the mean shelter rating for pools was LOW with a rating of 18 and flatwater habitats was even lower (6). A pool shelter rating of approximately 100 is desirable. Reach 1 had a shelter value of 17 while Reach 2 was only slightly better at 25. The relatively SMALL amount of cover that now exists is being provided primarily by TERRESTRIAL VEGETATION in Reach 1 and BOULDERS in Reach 2. Additionally, UNDERCUT BANKS and ROOT MASS contribute a small amount. The occurrence of large woody debris overall is extremely small (5% in Reach 1 and 1% in Reach 2). LOG AND ROOT WAD cover structures in the pool and flatwater habitats are needed to improve both summer and winter salmonid habitat in both reaches. Log cover structure provides rearing fry with protection from predation, rest from water velocity, and also divides territorial units to reduce density related competition. These structures also provide cover for spawning adults when streams clear between storms.
FIFTY-FIVE of the 64 low gradient riffles had GRAVEL as the dominant substrate. This is generally considered good for spawning salmonids. However, embeddedness ratings were high in Reach 1, indicating poor spawning habitat in this low gradient reach. Scouring flow created by introduction of large woody debris and initiating bank protection measures where needed would improve spawning conditions in Reach 1.
The mean percent canopy for the stream was 90%. This is an excellent percentage of canopy, since 80 percent is generally considered optimum in these north coast streams. However, in Reach 1, where stream bank erosion exists, planting endemic species of coniferous and deciduous trees, in conjunction with bank stabilization, is recommended.
Biological surveys were conducted to document fish distribution and are not necessarily representative of population information. Steelhead were documented consistently during each past survey year and coho only intermittently. This is likely because physiological and environmental requirements for coho are more stringent than for steelhead. Overall, very few fish were observed during the 1994 surveys. However, the surveys were conducted late in the year when many fish may have outmigrated already. The 1995 spring surveys on Green Valley Creek documented many 0+ fish indicating successful spawning. However, few 1+ fish were observed indicating poor rearing conditions the year before or poor holding-over conditions in general. Similar or better fish production is predicted for Purrington Creek since habitat conditions here are considerably better. In addition, steelhead were observed upstream of the survey area indicating a point for the end of anadromy higher up in the system than was previously noted. Habitat conditions upstream of our survey reach are marginal, however.
SUMMARY
Steelhead were documented consistently during each past survey year and coho only intermittently. This is likely because physiological and environmental requirements for coho are more stringent than for steelhead.
In general, Reach 1 of Purrington Creek has poor spawning habitat but fair rearing habitat. Riffle habitat exists but gravel embeddedness values are high due to eroding stream crossings and streambank erosion. Canopy is excellent in most areas although consists mostly of smaller vegetation types, thus stream temperatures are sub-optimal due to lack of mature riparian canopy in most areas. Some deep pool habitat exists although instream shelter values are low. The G1 channel type of Reach 1 is rated as fair for log cover, but poor for boulder clusters or bank cover.
Reach 2 has both fair spawning
and rearing habitat. Gravel embeddedness values are lower, less
stream bank erosion is prevalent (although some very unstable areas
exist adjacent to the county road system) and the gravel substrate is
more suitable for spawning. More shelter components exist (mainly
boulders) although pool depths are less due to the lack of woody
debris in this higher gradient reach. The B2 channel type of Reach 2
is rated as excellent for low and medium-stage plunge weirs, single
and opposing wing deflectors, and bank cover. Many opportunities
exist for various restoration alternatives in both of these
reaches.
GENERAL RECOMMENDATIONS
SPECIFIC FISHERY ENHANCEMENT RECOMMENDATIONS
1)Where feasible, increase woody cover in the pool and flatwater habitat units along the entire stream. In Reach 1 most of the existing cover is from rootmass and undercut banks. Adding combination cover/scour structures and high quality complexity with larger woody cover is desirable.
2)For sources of upslope and in-channel erosion, utilize biotechnical approaches. In many cases, planting will need to be coordinated to follow bank stabilization or upslope erosion control projects.
3)Spawning gravels on Purrington Creek are available in both reaches, however, only reach 2 is suitable for spawning. Projects should be designed at suitable sites to encourage scour and sort spawning gravels in order to improve embeddedness conditions in Reach 1.
4) Where feasible, design and engineer pool enhancement structures to increase the number of pools and the shelter within. This must be done where the banks are stable or in conjunction with stream bank armor to prevent erosion.
5)Domestic garbage along the creek should be cleaned up and existing illegal dump sites along the road should be posted so that toxic substances do not enter the creek. These dump sites appear to be routinely visited.
RESTORATION IMPLEMENTED
1)The winter 1995 storms brought down many large trees and other woody debris into the stream, which increased the number and quality of pools since the date of this survey. This woody debris, if left undisturbed, will provide fish cover and rearing habitat, and offset channel incision. Many signs of recent and historic tree and log removal were evident in the active channel during our survey. Misguided efforts to increase flood protection or improve fish access in the short run, have led to long term problems in the system. Landowners should be educated about the natural and positive role woody debris plays in the system, and encouraged not to remove woody debris from the stream, except under extreme buildup and only under guidance by a fishery professional.
2)Where feasible, increase woody cover in the pool and flatwater habitat units along the entire stream. In Reach 2 combination cover/scour structures constructed with boulders and woody debris would be effective in many flatwater and pool locations. This must be done where the banks are stable or in conjunction with stream bank armor to prevent erosion. In some areas the material is at hand.
3)Several stream crossings exist in Reach 1. These crossings should be improved to eliminate active soil erosion and runoff.
4)For sources of upslope and in-channel erosion, utilize biotechnical approaches. In many cases, planting will need to be coordinated to follow bank stabilization or upslope erosion control projects (Reach 1 completed).
Stream LANDMARK, PROBLEM OR OBSERVATION NOTED Length
27 CONFLUENCE W\GREEN VALLEY CR.
********** UNIT #1 265 TRAIL ACCESS, RT BANK.
350 TIRES IN CREEK. 377 RIPRAP RT BANK.
462 LOTS OF ALDERS, TIRES. 537 2 POOLS SEPARATED BY LOG JAM/SWD.
TRASH AND SCUMMY WATER 582 ERODING RT BK 617 LARGE ROOT WAD IN
POOL
654 POOLS SEPARATED BY SHORT RIFFLE 722 ROAD CROSSING THROUGH CREEK
PRODUCING SILTATION *** UNIT 016 850 1+ FISH 1044 GULLY/LFT BANK FULL
OF OLD TIRES, 75+ APPLIANCES (EROSION CONTROL STRUCTURE) 1329 LOG
JAMS BETWEEN 024 AND 025, 5' ACROSS WATER RUNS UNDERGROUND. FIRST
BRIDGE AT GRATON RD AT TOP OF UNIT 25.LOG JAM STORING SOME GRAVEL,
KEEP WATCH 1-2' ELEV. LARGER IN PAST?. ********* UNIT #025 1339
SPRING SEEPING WATER FROM STEEP LFT BANK.
1357 BRIDGE SILL.NO DOWN-CUTTING.
************ UNIT #026
1656 Riprap.
1672 Riprap.
1687 Trail left bank,low erosion potential. 1789 CEMENT BLOCKS IN
STREAMBED PROVIDING SOME HABITAT. 2000 SCOUR ON LFT BK. DOWN CUTTING
OBSERVED THROUGH THIS REACH. LWD HAS BEEN CUT OUT THROUGH HERE. 2018
RIFFLE BETWEEN POOLS SCOUR ON RT BK 2165 GULLY ON RT BK 2398 LOG JAM.
STORING GRAVEL AND 4 FT HIGH IN PAST. MAY NEED EROSION CONTROL
MAINTENANCE DOWN STREAM ON RT. BANK.******** UNIT #049
2415 WOODY DEBRIS ACROSS
CREEK;16 FT LONG;11 FT WIDE. OBSTRUCTS FLOW ON RT BK 2426 SUBSTRATE
IS HARD CLAY 2459 TRASH ON LFT BK 2536 HARDENED CLAY BANKS 4 FT ABOVE
WETTED CHANNEL. 2571 AT FIRST PRIVATE CAR BRIDGE: FLASH-BOARD DAM 5
FT
HI; NO DOWN CUTTING AT SILL. ***** UNIT #066
2671 UNACCESSIBLE REACH BEHIND DAMMED LENGTH ESTIMATED
2821 HEAVY VEGETATION THROUGH CK, TREE BLOCKING CK
3100 5.4 (BEDROCK) =HARD CLAY PAN. 3245 SLASH ON BANK AND IN CK -
CLEARED TO EDGE OF LEFT BANK. 3261 SLASH DUMPED OVER BANK AND INTO
CRK, NO LIVE VEGETATION ON LT BANK ******************** UNIT #083
Stream LANDMARK, PROBLEM OR OBSERVATION NOTED Length
3279 DEAD VEGETATION LFT BK 3418 SMALL GULLY RT BK 3485 RT BK ROAD
CROSSING INTO CK-GRAVEL/DIRT IN CK
SILTATION POTENTIAL********* UNIT # UNIT #089
3506 RT AND LT BANKS-DIRT ROAD
THROUGH CREEK 3524 ROAD INTO CK, LT BK DIRT.****************** UNIT #
090
3708 LOG/DEBRIS JAM AT START OF UNIT 3835 METAL DEBRIS UPPER LT BK
4401 Rt bank eroding severely 40' long/20' HIGH.** UNIT 109
4532 Left bank bare of
vegetation. **** UNIT #114
5185 SPRING (?) ON LEFT BANK.
5441 CEMENT RIPRAP IN WETTED CHANNEL CAUSING
ACCUMULATION OF GRAVEL UPSTREAM. GRADIENT CHNG OF 1 FT. 5733 LOG JAM
4' HIGH, AGGRADING UPSTREAM GRAVEL 10'
LONG, 1' GRADIENT CHANGE.
5871 DEAD TREES/DEBRIS DOWN LFT BANK.
7562 SEVERELY ERODED LFT BANK;DEBRIS; PARTIAL LOG JAM.
7692 PARTIAL LOG/DEBRIS JAM. ERODED RT BANK. TRIB RT
BANK.******************** UNIT #142
8497 GULLY.
8527 LEFT BANK EROSION.
8583 POOLS DIVIDED BY EXPOSED SUBSTRATE.
8639 POOLS DIVIDED BY EXPOSED SUBSTRATE.
8650 LFT BANK GULLY.
8855 LFT BANK EROSION/RIP-RAP.
8873 RT BANK EROSION.
8895 RT BANK EROSION.
8909 RT BANK EROSION.
9659 RT BANK EROSION, SHARP BEND IN CREEK.
9708 SEVERELY ERODED LFT BANK, COLLAPSED CEMENT DAM/LOG
JAM, 2+GRAVEL DEPOSITION UPSTREAM.********** UNIT 159
9762 LFT BANK EROSION.
10078 WOODEN RETAINING WALL LFT BANK.
10133 GRADIENT CHANGE.
10193 LFT BANK SECURED BY WOODEN BOARDS.
10266 RT BANK ERODING 20' HIGH.
10395 LFT BANK EROSION, NO VEGETATION.
10540 LFT BANK ERODING, NO VEGETATION.
10691 LFT BANK NO VEGETATION, ERODING.
10715 CHANNEL NARROWS RT BANK,EROSION.
10897 RT BANK ERODED.
10983 TRIB ON RT BANK (STUGEON CREEK), 6' WIDE WETTED CHANNEL.
*** UNIT 185.
11115 SMALL GULLY RT BANK.
11346 TRIB ON RT BANK,DRY;2' WIDE AT CHANNEL.
11370 RT BANK STEEP ERODED 15' HIGH. Stream LANDMARK, PROBLEM OR
OBSERVATION NOTED Length
11410 BEDROCK ONLY.
11727 LFT BANK TERRACED/ERODED.
11768 ARTIFICIAL DAM (GRAVEL/SAND) CROSSING STREAM.
11800 LFT BANK WETTED TRIB 6' AT WETTED CHANNEL. ** UNIT #207
11849 RT BANK ERODING, STEEP,
LITTLE VEGETATION.
12014 RT BANK REINFORCED WITH CHICKEN WIRE.
12414 RT BANK FLOWING TRIB. ****************** UNIT #221
12549 SOLID CLAY BOTTOM IN STEP POOL.
12578 CEMENT BRACES AND RIP-RAP BOTH SIDES OF CREEK.
SECOND GRATON RD BRIDGE******UNIT #223
12705 ERODING LFT BANK. TRIB LFT BANK COMING FROM FLUME.
12987 GRAVEL/COBBLE DAM.
13021 SMALL BOULDER/GRAVEL DAM, NATURAL AND ADDED TO.
SEEPAGE FROM LFT BANK.
13081 ERODING RT BANK.
13118 ERODING RT BANK.
13204 CEMENT SILL ERODED.
13259 ERODING LFT BANK. WOODEN DAM.************** UNIT 241
13457 SCOUR AROUND BANK. ROOTS HOLDING BANK TOGETHER. 13474 LFT BANK
ERODED.
13500 CLAY ON LFT BANK ACTING AS BEDROCK.
13667 LFT BANK COLLAPSED, STEEP.
13864 EROSION ON RT BANK.
14049 RT BANK ERODED VERTICALLY. *********** UNIT 256 14479 GREATER
THAN 4% GRADE IN CREEK.
14544 LFT BANK ERODED, NO VEGETATION.
14636 GULLY ON RT BANK, LOGGING ROAD.
14751 RT BANK DRAINAGE PIPE.
14763 ENTRENCHED BOULDER SUBSTRATE GRADIENT. CHANNEL TYPE
CHANGE*********UNIT #271
14819 SERIOUSLY ERODING LFT BANK.********** UNIT #272
14997 DRY SIDE CHANNEL LFT BANK.
15240 LARGE BOULDERS.
15571 ERODING LFT BANK.
15798 LFT BANK TWO CARS SIDE-BY-SIDE.
16082 RT BANK ERODING.
16223 3' ROCK DAM PASSING GRAVEL. *********** UNIT 304 16257 0+ SHD
ABOVE DAM.
16348 GARBAGE IN STREAM UP TO ROAD.
16737 GARBAGE DUMPED UP TO ROAD (GRATON ROAD) ****** UNIT 307
16829 PRIVATE CAR BRIDGE.
17358 THIRD GRATON RD CROSSING
BOX CULVERT, 9.5' X 11' X 59' - PASSING GRAVEL,
1' DOWNCUTTING AT SILL.****** UNIT #325
17477 TRIBUTARY ON RT BANK.*********** UNIT #327
17641 PRIVATE BOX/CULVERT 5' X 7' X 14', PASSING GRAVEL/BOULDERS AT
SILL. Stream LANDMARK, PROBLEM OR OBSERVATION NOTED Length
17718 SPAWNING AREA.
17740 CHANNEL TYPE MEASURED.
17871 EVIDENCE OF FLOOD CONTROL- SAWED STUMPS ON BANK. 18188 GOOD
SPAWNING HABITAT/ NEEDS MORE ONSTREAM COVER.
****** UNIT #339
18336 PRIVATE BOX CULVERT 11' X
11' X 14'. TRIBUTARY RT BANK. 18711 TRIBUTARY LFT BANK. *****UNIT
343
18762 RIP-RAP RIFFLE, 0+.
19062 LITTLE WATER, ADULTS SPAWNING HERE IN PAST
(LANDOWNER). END OF SURVEY - INTERMITTENT
*****UNIT 345