20020598 Ver 1_Year 4 Monitoring Report_20080414

Clear Creek Final Monitoring Report
Year 4 of 5 (2007)
Henderson County, North Carolina
USGS HUC: 06010105
Project ID No. 92
Prepared for:
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NCDENR-Eco system Enhancement Program
1652 Mail Service Center
Raleigh, North Carolina 27699-1652
February 2008
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Executive Summary
The Clear Creek Stream Restoration project falls within USGS hydrologic unit 06010105. The
project lies within a rural setting that includes pasture, farmland, and low density residential
areas. Prior to restoration work, the project stream had been destabilized though channelization
and hoof-shear.
EcoLogic Associates designed the restoration plans and restoration was completed in 2002.
Kimley-Horn and Associates (KHA) performed stream and riparian monitoring during 2007 for
this year 4 monitoring report. During the late growing season, KHA assessed four (4) vegetation
quads. Combined stem count density for all the quads equaled approximately 450 stems per acre
for planted stems: exceeding year 4 success criteria. Vegetation on the left side is performing
better than vegetation on the right side of the stream. A small area of Kudzu remains near the
downstream section of the stream. This area has not expanded since 2006. Isolated areas of
invasives such as Russian Olive are also present.
The stream assessment that included a visual assessment and geomorphic survey indicated that
the project reach was performing mostly within established success criteria ranges. Several
isolated sections showed bank erosion and a few structures were stressed or failing. Most of the
project reach continues to be stable. The geomorphic measurements are within the ranges of the
design parameters.
Clear Creek (92) Final December 2007 - Year 4 of 5 i=?'
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Table of Contents
1.0 Project Background .............................................................................................................. 3
1.1 Location and Setting ......................................................................................................... 3
1.2 Project Structure, Mitigation Type, Approach and Objectives ........................................ 3
1.3 Project History and Background ...................................................................................... 5
1.4 Monitoring Plan View ...................................................................................................... 8
2.0 Project Conditions and Monitoring Results ....................................................................... 12
2.1 Vegetation Assessment .................................................................................................. 12
2.2 Stream Assessment ......................................................................................................... 13
3.0 Methodology ......................................................................................................................17
Tables
Table I: Project Mitigation Structure and Objectives Table ........................................................... 3
Table II: Project Activity and Reporting History ........................................................................... 5
Table III: Project Contact Table ..................................................................................................... 6
Table IV: Project Background Table .............................................................................................. 7
Table V: Verification of Bankfull Events ..................................................................................... 13
Table VI: Categorical Stream Features Visual Stability Assessment ........................................... 14
Table VII: Baseline Morphology and Hydraulic Summary .......................................................... 15
Table VIII: Morphology and Hydraulic Monitoring Summary .................................................... 16
Figures
Figure 1: Project Setting ................................................................................................................. 4
Figure 2: Monitoring Plan View Sheet 1 ...................................................................................... 10
Figure 3: Monitoring Plan View Sheet 2 ...................................................................................... 11
Appendices
Appendix A: Vegetation Monitoring Data
Appendix B: Stream Monitoring Data
Clear Creek (92) Final December 2007 - Year 4 of 5 it
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1.0 Project Background
1.1 Location and Setting
The Clear Creek stream restoration project is located between I-26 and Clear Creek Road in
Henderson County, NC. The site, a fourth order tributary to Mud Creek in the French Broad
River Basin, is located in a relatively low slope mountain valley.
Figure 1 shows the project vicinity and mitigation features.
1.2 Project Structure, Mitigation Type, Approach and Objectives
Prior to restoration, the majority of the reach's stream banks were nearly vertical and exposed,
with minimal vegetative cover. As a result, the banks were actively eroding, subsequently
slumping and promoting lateral channel migration and meander creation. The degraded channel
was classified as an "F" type channel under the Rosgen Stream Classification System. Some
sections of channel were incised and had limited access to their historic flood plain during large
flood flows, but not during bankfull events that typically occur as a result of the 1.5 to 2 year
storm event.
The project included 1,300 linear feet of stream restoration. Table I shows a summary of the
project structure and objectives.
Tnhlp I_• Prnipet Mitiuntion Structure and 0hiectivec Tahle
Table I. Project Restoration Components
Clear Creek Stream Restoration Site (FOP Project #92)
Project 4 c a? 0 0
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Comment
or Reach W F o ?' u 'G
ID G°
Main 1,300 R PI 1,300 If 1:1 1,300 0+00.0 - 13+00.0
Mitigation Unit Summaries
Stream (it) Riparian Non-Riparian Total Wetland Buffer (Ac.) Comment
Wetland Ac. Wetland Ac. Ac.
1,300 0.0 0.0 0.0
R =Restoration P1
El =Enhancement I P2
Ell =Enhancement II P3
S =Stabilization SS
= Priority I
= Priority II
= Priority III
= Stream Bank stabilization
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Prepared For Clear Creek Stream Restoration Monitoring Year 4 (2007)
Project Henderson, North Carolina
Date Project Number
1`?('t)Jy1tC111
2/18/08 92
Prepared By
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and Associates, Inc.
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1.3 Project History and Background
Construction of the Clear Creek Stream Restoration began in early 2002 with construction
ending in the fall of 2002. The As-built survey was completed in early 2003. 2007 served as
Year 4 of monitoring. Table II provides additional details regarding the timeline of the project.
Table 11: Proiect Activitv and Renartinu 14ictnrv
Table IL Project Activity and Reporting 1listory
Clear Creek Stream Restoration Site (EEP Project #92)
Scheduled Data Actual
Activity or Report Completion Collection Completion or Comments
Complete Deliver
Restoration Plan December-01 March-02
Final Design - 90%
Construction Fall 2002
Temporary S &E mix
applied to entire project
area
Permanent seed mix
applied
Containerized and
B&B plantings for
reach/se ments 1&2
Mitigation Plan / As-
built (Year 0 October-02
Monitoring - baseline)
Year 1 Monitoring December-04
Performed by Soil and Environmental
Year 2 Monitoring December-OS November-OS December-OS Consultants, PA
Performed by Kin*y - Horn and
Year 3 Monitoring December-06 November-06 January-07
Associates, Inc.
Perfomied by Kimley - Hom and
Year 4 Monitoring December-07 Novermber-07 February-08
Associates, Inc.
Year 5 Monitoring December-08
The project was designed by EcoLogic Associates. The construction contractor is unknown.
KHA performed monitoring work for Year 4. Table III provides additional information
regarding contractors.
Clear Creek (92) Final December 2007 - Year 4 of 5 5 /??
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Tahla III- PrniPrt Vnntart Tahh-
Table III. Project Contact Table
Clear Creek Stream Restoration Site (EEP Project #92)
Designer
EcoLogic Associates Greensboro, NC
Primary Designer POC
Construction Contractor

Primary Contractor POC
Planting Contractor

Planting contractor POC
Seeding Contractor

Planting contractor POC
Seed Mix Sources
Nursery Stock Suppliers
Monitoring Performers PO Box 33068
Kimley-Horn and Associates Raleigh, NC
Stream Monitoring POC Andrew Kiley [phone]
Vegetation Monitoring POC Andrew Kiley [phone]
Clear Creek (92) Final December 2007 -Year 4 of 5 6 C??
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The project is located within Henderson County, portions of which are located within the Blue
Ridge Belt of the Mountains of North Carolina. The site is located within a moderately rural
area. Table IV provides additional information regarding the stream.
Table TV: Proiect Backnrannd Table
Table IV. Project Background Table
Clear Creek Stream Restoration Site EEP Project #92
Project Count Henderson
Drainage Area 44 mil
Drainage impervious cover estimate % 20%
Stream Order 4th
Ph sio ra hic Region Mountains
Ecore ion Blue Ridge Belt
Ros en Classification of As-built C4
Cowardin Classification N/A
Dominant soil types Codorus
Reference site ID N/A
USGS HUC for Project and Reference 06010105
NCDWQ Sub-basin for Project and
Reference 04-03-02
NCDWQ classification for Project and
Rpfprpnep C
Any portion of any project segment 303d
listed? No
Any portion of any project segment
upstream of a 303d listed segment? No
Reasons for 303d listing or stressor N/A
of project easement fenced 0%
Clear Creek (92) Final December 2007 - Year 4 of 5 7
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1.4 Monitoring Plan View
The monitoring plan assesses the project stream's geomorphology using a set of three (3) cross
sections located throughout the project reach. The longitudinal profile and pattern assessment
covered the entire reach. Twenty-nine (29) permanent photo points had been used to provide for
a visual comparison of key site features through time. During the 2007, KHA modified the
number and location of the photo points to reduce redundancies and streamline comparison
points. The monitoring plan uses four (4) randomly placed vegetation quads to assess riparian
buffer restoration. KHA performed channel material sampling at each cross section. Figures 2
and 3 show the locations of the monitoring features.
Clear Creek (92) Final December 2007 - Year 4 of 5 g
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Fioure 2- Mnnitnrina Plan View Sheet 1
" 2007 Assessment Legend Stabilzation Structures Legend As-Built Legend
" E Stream Point Bars As Built Bank Stabilzation (Root Wads etc.) As Built Stream Centerline
S Vegetation Problem Areas (2007) In-Stream Stabilzation Function (2007) As Built Vegetation Quads
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?j; I i 1 Bank Scour (2007) As Built Cross Sections
j Bank Slump (2007) \c 0` a`` oa o ` As Built Permanent Photo Points
Root Wad Scour (2007) ? As Built Survey Benchmarks

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Prepared For
Clear Creek Stream Restoration Monitoring Year 4 (2007) Prepared By
Project
Henderson, North Carolina
?(Oti?1l(111 Date Project Number KimleyHom
92 and Associates
Inc.
2/22/08 ,
Clear Creek (92) Final December 2007-Year 4 of S 10
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Kudzu Population
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2007 Assessment Legend Stabilzation Structures Legend As-Built Legend
Slow growing vegetation ;? Stream Point Bars As Built Bank Stabilzation (Root Wads etc.) As Built Stream Centerline
(Approximate Boundary) Vegetation Problem Areas (2007) In-Stream Stabilzation Function (2007) As Built Vegetation Quads
i) I I Bank Scour (2007) = As Built Cross Sections
Bank Slump (2007) c
41 oo ooa As Built Permanent Photo Points
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Prepared For Clear Creek Stream Restoration Monitoring Year 4 (2007) Prepared By
Project Henderson, North Carolina
"I Date Project Number 16mle -Horn
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Clear Creek (92) Final December 2007 - Year 4 of 5 I I
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2.0 Project Conditions and Monitoring Results
2.1 Vegetation Assessment
The Clear Creek site consists of two vegetative zones: riparian buffer and stream banks. The
riparian buffer zone begins at the top of the bank and continues out perpendicular from the
stream. The planted stream bank begins at the normal base flow elevation and extends to the top
of bank or interface with the flood plain. Success criteria require 288 live stems per acre within
the restoration area during year 4 of a 5-year monitoring period.
The Kudzu population reported during the MY2 2005 and MY3 2006 monitoring reports remains
on site. The population falls within an isolated area near Clear Creek Road and does not appear
be spreading. A small riparian area upstream of the Kudzu population along the right bank does
not appear to be thriving. Vegetation growth in this area is more scattered and less vigorous than
the rest of the site. A small floodplain bench on the left side of the channel between stations 455
and 560 is covered with grasses and lacks significant numbers of woody vegetation. Russian
Olive (Elaegnus pungens) grows in isolated populations (3-4 specimens) throughout the site.
The larger populations are show on Figure 2.
Appendix A provides representative photos of problem areas and sampling areas. Figures 2 and
3 show the problem areas.
KHA conducted a vegetation assessment during the early fall of 2007. Appendix A summarizes
the results of the vegetation sample. Three (3) of the four (4) plots met success criteria for
planted stem counts. Plot 3 contains less planted stems than required, but total stems including
volunteers exceed success criteria. The plot summary also shows that in the plots on the left side
of the stream, Betula nigra is rapidly colonizing.
Clear Creek (92) Final December 2007 - Year 4 of 5 12 ?n
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2.2 Stream Assessment
KHA assessed the stream channel during the spring and fall of 2007. Several isolated sections
exhibited bank scour. Excessive shear stresses and possibly historic flood flows may have a role
in the scour. Back eddy currents immediately below a structure may be causing bank slumping
along a section of the left bank (Station 710-750). Some structures seemed to exhibit signs of
stress including partial to complete structure collapse; excessive arm scour; and missing header
rock. Several root wads along the middle and lower section of the reach have experienced scour
behind the root balls and may be unstable. Figures I and 2 show the location of the stream
problem areas and table B 1 in appendix B summarizes the stream problem areas.
EEP installed a crest gage near permanent cross section XS-2. During the November field visit,
the gage did not indicate that bankfull events had occurred since the last reading. Table V
provides a listing of bankfull events based on the estimated bankfull discharge from a proximate
USGS gauge.
Table Vc Verifientinn of Ranlrfnll Fvnntc
Table V. Verification of Bankfull Events
Clear Creek Stream Restoration Site EEP Project #92
Date of Data Date of Occurrence Method Photo #
7/2/2003 7/2/2003 Proximal USGS Gauge (ID#03446000)
9/8/2004 9/8/2004 Proximal USGS Gauge ID#03446000
I :
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A
Table VI provides a categorical view of the stream visual stability assessment. The visual
assessment shows an apparent decrease in stability related to bank condition. Riffles, thalweg,
meanders, and in-stream structures function similarly to the previous year. Bank stabilization
structures did not show a decrease in stability, but they also did not improve. Meander instability
relates to floodplain relief and point bar slope. All four (4) of the point bars appear to be overly
steep and may not provide adequate floodplain relief. Each meander shows active, likely slow,
lateral migration evidenced by outer bank erosion with coincident point bar formation and
expansion. The thalweg appears to be actively shifting and mobile. In some locations the
alignment of the thalweg appeared to be out of place. Also, in some locations multiple thalweg
lines were present within a section of channel. The riffles appeared to be short and this may be
related to the shifting thalweg. Table B2 in Appendix B provides a breakdown of the visual
assessment.
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Table Vi- Cnteunrical Stream Features Visual Stability Assessment
Table VI. Categorical Stream Feature Visual Stability Assessment
Clear Creek Stream Restoration Site EEP Project #92

Feature Initial MY-01 MY-02 MY-03 MY-04 MY-05
A. Riffles -- -- 90% 80% 80%
B. Pools -- -- 100% 100% 100%
C. Thalwe -- -- 100% 50% 50%
D. Meanders -- -- 100% 75% 75%
E. Bed General -- -- 100% 100% 100%
F. Bank Condition -- -- 98% 93% 90%
G. Vanes / J Hooks etc. -- -- 85% 75% 75%
H. Wads and Boulders -- -- 63% 65% 65% --
Table VII and Table VIII summarize the site geomorphic assessment. The longitudinal profile
utilizes bankfull measurements based on observations in the field. Bankfull indicators for cross
sections align with the previous years data to allow direct comparison. The field investigators
had difficulty identifying and/or isolating cross section benchmarks in the field; therefore some
of the cross sections had a slightly different alignment than previous year's cross sections. The
difference in alignment negates a very fine comparison between years for a cross section but
does allow for the identification of significant changes in cross section. The cross sections did
not show a significant change in the shape or area compared to last year. Appendix B provides
photographs and graphing for geomorphic data.
Clear Creek (92) Final December 2007 - Year 4 of 5 14=I? KMry?iOm
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Table VII: Baseline Mornholoov and Hydraulic Summarv
Table VII. Baseline Morphology and Hydraulic Summary
Clear Creek Stream Restoration Site (EEP Project #92)
Reach
Parameter USGS Ga e Data Re ional Curve Pre-Existin Con dition Project Reference Stream Design As-built
Units Min Max Med Min Max Med Min Max Med Min Max Med Min Max Med Min Max Med
Dimension
BF Width ft * * * 60.5 77.3 * * * 53 32 69 * * * 73
Floodprone Width ft * * * * * * * * 129 85 220 * * * 275
BF Cross Sectional Area ft2 * * * 281 286 * * * 246 66 199 * * * 339
BF Mean Depth ft * * * 3.6 5 * * * 4.64 2.1 2.9 * * * 4.66
BF Max Depth ft * * * * * * * * 7.7 2.5 5.2 * * 7
Width/Depth Ratio * * * * * * * * 11.4 15.6 23.9 * * * 15.6
Entrenchment Ratio * * * * * * * * 2.4 2.6 4.7 * * * 3.8
Bank Height Ratio * * * * * * * * 1.6 1 1.1 1 * * 1
Wetted Perimeter ft * * * * * * * *
Hydraulic radius ft
*
*
*
*
*
*
*
*
Pattern
Channel Beltwidth ft * * * * * * 67 100 * 50 75 * * * 131
Radius of Curvature ft * * * * * * * * 69 20.4 69 * 90 150
Meander Wavelength ft * * * * * * * * 230 339 350 * * * 763
Meander Width ratio * * * * * * * * 1.6 1.6 2 * * * 1.8
Profile
Riffle length ft * * * * * * * *
Riffle slope ft/ft * * * * * * * * 0.008 0.021 0.034 * * * 0.003
Pool length ft * * * * * * * * 87 17 285 * * * 80
Pool spacing ft * * * * * * 235 393 * 66 631 * 300 420
Substrate
d50 mm * * * * * * * * 3 12 58 * * * 3
d84 mm * * * * * * * * 20 31 425 * * * 20
Additional Reach Parameters
Valley Length ft
Channel Length ft
Sinuosity * * 1.09 1.2 1.17
Water Surface Slope ft/ft * * 0.002 0.004 0.002
BF slope ft/ft
Rosgen Classification * * C4 C4/1 C4
*Habitat Index
*Macrobenthos
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Table VIII: Morphologv and Hvdraulic Monitoring Summary
Table VIII. Morphology and Hydraulic Monitoring Summary
Clear Creek Stream Restoration Site (EEP Project #92)
Parameter Cross Section 1 Cross Section 2 Cross Section 3
Ri ffle Pool Ri ffle
Dimension Units AB MY1 MY2 MY3 MY4 MY5 AB MY1 MY2 MY3 MY4 MY5 AB MYl MY2 MY3 MY4 MY5
BF Width ft * * 60.67 54.4 59.7 * * * 66.3 65.3 61.2 * * * 56.8 55.0 54.7
Flood prone Width ft * * 202.15 200.6 184.0 * * * 169.72 132.5 165.4 * * * 168.11 135.3 155.3
BF Cross Sectional Area ft * * 287.43 264.4 284.0 * * * 298.3 296.1 296.0 * * * 281.43 239.6 275.0
BF Mean Depth ft * * 4.74 4.9 4.8 * * * 4.5 4.5 4.9 * * * 4.95 4.4 5.0
BF Max Depth ft * * 5.91 6.4 6.2 * * * 7.99 8.2 8.0 * * * 7.7 7.4 7.7
Width/De th Ratio * * 12.81 11.2 12.5 * * * 14.74 14.4 12.6 * * * 11.46 12.6 10.9
Entrenchment Ratio * * 3.33 3.7 3.1 * * * 2.56 2.0 2.7 * * * 2.96 2.5 2.8
Bank Height Ratio * * 1.4 1.3 1.3 * * * * * * * * * 1.3 1.2 1.2
Wetted Perimeter ft * * 65.66 59.1 63.5 * * * 71.09 69.8 66.3 * * * 61.38 59.1 60.4
Hydraulic radius ft * * 4.38 4.5 4.5 * * * 4.2 4.2 4.5 * * * 4.59 4.1 4.6
Substrate
d50 mm * * * 0.28 1.4 * * * * 0.5 2.2 * * * * 0.33 0.5
d84 mm * * * 13.45 6.5 * * * * 7.91 5.8 * * * * 20.45 1.6
Parameter AB (2003) MY-01(2004) MY-02 (200 5) MY-03 (200 6) MY-04 (2007) MY-05 (200 8)
Pattern m ax e m ax e m ax a in Max e m ax e m ax e
Channel Beltwidth ft * * * * * * 131 153 143 122 198 148 122 153.75 198
Radius of Curvature ft * * * * * * 89 105 97 124 194 183 124 170.75 194
Meander Wavelength ft * * * * * * 497 576 536 511 541 526 512 523 534
Meander Width ratio * * * * * * 2.2 2.6 2.4 2.0 3.3 2.5 2 2.55 3.3
Profile
Riffle length ft * * * * * 15 89 38 15 23 21 21.723 89.193 44.5505
Riffle sloe ft/ft * * * * * * 0.0007 0.0019 0.0014 0.0040 0.0040 0.0040 0.0060543 0.0228878 0.0137256
Pool length ft * * 28 135 65 131 290 182 91.521 277.793 169.6825
Pools acin ft * * * * * * 260 291 311 227 360 279 249.874 306.801 277.882
Additional Parameters
Valle Length ft * * * * * * * * 1115 * * 1115 * * 1115
Channel Length ft * * * * * * * * 1228 * * 1228 * * 1228
Sinuosity * * * * * * * * 1.11 * * 1.11 * * 1.11
Water Surface Sloe ft/ft * * * * * * * * 0.0015 0.0002 0.0014 0.0009 * * 0.0012
BF sloe ft/ft * * * * * * * * * * * 0.0009 * * 0.0008
Ros en Classification * * * * * * * * C4 * * C4 * * C4
Habitat Index* * * * * * * * *
Macrobenthos* * * * * * * * *
Clem Creek (92) Final December 2007- Year 4 of 5 16 C"I1 Koft?
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3.0 Methodology
•
Monitoring methods for 2007 were similar to those used during the 2006 effort.
Clear Creek (92) Final December 2007 - Year 4 of 5 17
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Table V. Preliminary Soil Data
Clear Creek Stream Restoration Site (EEP Project #19)
Series Max Depth (in.) % Clay on Surface K T OM %
Codorus (Co) 60 15-25 0.37 2 1.0-5.0
Table 6. Vegetative Problem Areas
Clear Creek Stream Restoration Site EEP Project #92
Feature/Issue Station # / Range Probable Cause Photo #
2007
Bare Bank -- -- --
Bare Bench 455 - 560 Left Bank) Limited Wood Vegetation VP I
Bare Flood Plain 850 - 1,000 (Right Bank) Limited or Stunted Growth - cause
unknown VP 2
165 - 210 (Left Side) Small Russian Olive Population VP 3
Invasive/Exotic Populations 300 - 340 (Left Side) Small Russian Olive Population
--
1,020 - 1,120 Kudzu Population VP 4
2006
Bare Flood Plain 850 - 1,000 (Right Bank) Limited or Stunted Growth - cause
unknown
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ons 1,020 - 1,120 Kudzu Population

Table VII: Stem counts for each species arranged by plot.
Clear Creek Stream Restoration Site (EEP Project #19)
Plots
1 2 3 4
Species
Y2 Y3 Y4
Y2 Y3 Y4 Y3
Y2 Y4
Y2 Y3 Y4 Species Y2
T
t
l Species Y3
T
l Species Y4
T
l
P V P V P V P Tv P V P
V V P V
P o
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s ota
s ota
s
100 m2 100 m2 100 m2 100 m2
Trees
Acer negundo 2 1 3 1 1 1 2 2 1 7
cer rubrum 1 1 2 1 1
cer sacchirinum 2 2 1 2 1 8 3 3
Betula nigra 8 8 52 8 129 7 7 35 7 39 2 2 1 2 2 2 2 1 8 107 188
Cephalanthus occidentalis 1 0 0 1
Elaegnus ungens 1 1 1 0
Fraxfnus ennsylvanicum 1 1 1 3 2 0
Plantus occidentalis 1 1 1 1 1 5 4 4 1 1 6 7
Quercus hellos 1 1 1 1 1 1 1 1 3 2
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Cornus amomum 4 2 1 2 2 5 5 1 5 1 1 1 2 2 1 4 10 14
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of o 18 17 5 16
Plot Totals 76 14 62 55 15 40 12 5 7 13 12 1
Plot Totals 156 14 142 62 13 49 9 5 4 19 13 6
Year Count Success Criteria 7 7 7 7 7 7 7 7
Y2: Year 2 Total; P: Planted; V: Volunteer
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Table Bl. Stream Problem Areas
Clear Creek Stream Restoration Site (EEP Project #92)
Feature Issue Reach Station numbers Description Suspected Cause Photo number
2007
Aggradation/Bar
Formation
100- 150 Bank Scour Excessive shear stress
200 - 240 Bank Scour Excessive shear stress
410 - 430 Bank Scour Excessive shear stress SP 1
Bank scour 710 - 750 Bank Slump/ Bank Scour Back eddy from upstream in-stream stabilization SP 2
780 - 810 Bank Scour Excessive shear stress
940 - 980 Bank Scour Excessive shear stress SP 3
1,020 - 1,050 Bank Scour Excessive shear stress
100 - 150 Partial Structure Collapse Excessive shear stress SP 4
En
ineered structures 545 Structure Collapse Excessive shear stress
g
- back or arm scour 690 Excessive Arm Scour Back eddy due to improper geomerty SP 5
Etc. 810 Missing header rock Excessive shear stress
600 - 650 Rootwad Scour Excessive shear stress
940 - 980 Rootwad Scour Excessive shear stress SP 6
2006
Aggradation/Bar
Formation
100- 150 Bank Scour Excessive shear stress
200 - 240 Bank Scour Excessive shear stress
Bank scour 710 - 750 Bank Slump/ Bank Scour Back eddy from upstream in-stream stabilization
780 - 810 Bank Scour Excessive shear stress
1,020 - 1,050 Bank Scour Excessive shear stress
100 - 150 Partial Strucutre Collapse Excessive shear stress
545 Structure Collapse Excessive shear stress
Engineered structures
-back or arm scour 690 Excessive Arm Scour Back eddy due to improper geometry
Etc. 810 Missing header rock Excessive shear stress
600 - 650 Rootwad Scour Excessive shear stress
940 - 980 Rootwad Scour Excessive shear stress
2005
121-166 Scour at arm of crossvane
Bank Scour 212 - 229 Scour at arm of crossvane
975- 1,007 Root wads on outside bend excessive scour

Stressed or Failing 1,068 - 1,092 Root wads on outside bend (near crossvane),
excessive scour
Structures 975 - 1 007 Root wads on outside bend excessive scour
1,068 - 1,092 Root wads on outside bend (near crossvane),
excessive scour
Table 132. Visual Morphological Stability Assessment
Clear Creek Stream Restoration Site (EEP Project #19)
Reach

Feature Category
Metric (per As-built and reference baselines) (# Stable) Number
Performing as

Intended Total number per
p
As-built` Total Number / feet in

unstable state
% Perform i
Stable Condition
Feature Perform.
Mean or Total
1 Present? 3 3 NA 100%
2 Armor stable (e.g. no displacement)? 3 3 NA 100%
A. Riffles 3 Facet grade appears stable? 3 3 NA 100% 80%
4 Minimal evidence of embedding/fining? 3 3 NA 100%
5 Length appropriate? 0 3 NA 0%

1 Present? (e.g not subject to severe aggrad. or migrat.?) 3 3 NA 100%
B. Pools 2 Sufficiently deep (Max Pool D:Mean Bkf>1.6?) 3 3 NA 100% 100%
3 Length appropriate? 3 3 NA 100%

Th
l 1 Upstream of meander bend (run/inflection) centering? 2 3 NA 67% °
r
0 /
a
weg
C.
2
Downstream of meander (glide/inflection) centering?
1
3
NA
33% J
o

1 Outer bend in state of limited/controlled erosion? 4 4 NA 100%
2 Of those eroding, # w/concomitant point bar formation? 4 4 NA 100%
75%
D. Meanders 3 Apparent Re within spec? 4 4 NA 100%
4 Sufficient floodplain access and relief? 0 4 NA 0%

l 1 General channel bed aggradation areas (bar formation) 0 0 001/1
00%
E. Bed Genera 2 Cbannel bed degradation !areas of increasing down-cutting or head cutting? 0 0 100%

F. Bank 2 Actively eroding, wasting, or slumping bank 5 250 90% 90%

1 Free of back or arm scour? 5 7 NA 71%
2 Height appropriate? 7 7 NA 100% 75°
/
G. Vanes
3
Angle and geometry appear appropriate?
5
7
NA
71% o
4 Free of piping or other structural failures? 4 7 NA 57%

1 Free of scour? 13 20 NA 65%
65%
H. Wads/ Boulders 2 Footing stable? 13 20 NA 65%

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XS1 2007 Riffle
0 X51 2007 Riffle ? Bankfull Indicators V Water Surface Points f\ X512006 Riffle A X512005 Riffle
Wbkf = 59.7 Dbkf = 4.77 Abkf = 284.8
2080
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2073
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Horizontal Distance (ft)
XS2 2007 Pool
0 XS22007 Pool ? Bankfull Indicators V Water Surface Points (\, X522006 Pool
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A XS2 2005 Pool
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Horizontal Distance (ft)
Cross Section XS3 - Riffle - Station 10+12
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A XS1 2007 (PC)
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