Loading...
HomeMy WebLinkAbout20080058 Ver 1_Year 4 Monitoring Report_20140808Elk Branch Restoration Project Year 2 Monitoring Report Mitchell County, North Carolina Monitoring Firm: irm: Michael Baker Engineering, Inc. (Baker) Monitoriniz Firm POC: Matthew Reid Prepared for: North Carolina Ecosystem Enhancement Program ( NCEEP) I -,ko systcl11 NCEEP Project Manager: Harry Tsomides Report Prepared By: Michael Baker Engineering, Inc., NC Professional Engineering License #F -1084 797 Haywood Road, Suite 201 Asheville, NC 28806 Contract Number: D06125 -C, EEP Project Number: 92665 Project Construction: 2011 Data Collection Period: November 2013 Date Submitted: February 2014 MICHAEL BAKER ENGINEERING, INC. ELK BRANCH MITIGATION PROJECT- YEAR 2 MONITORING REPORT FEBRUARY 2014 TABLE OF CONTENTS EXECUTIVESUMMARY ....................................................................................................... ............................... IV 1.0 PROJECT BACKGROUND .............................................................................................. ..............................1 1.1 LOCATION AND SETTING ................................................................................................. ..............................1 1.2 MITIGATION STRUCTURE AND OBJECTIVES .................................................................... ..............................1 1.3 PROJECT HISTORY AND BACKGROUND ........................................................................... ..............................5 1.4 MONITORING PLAN VIEW ............................................................................................... ..............................8 2.0 PROJECT CONDITION AND MONITORING RESULTS .......................................... ..............................8 2.1 VEGETATION ASSESSMENT ............................................................................................. ..............................8 2.1.1 Vegetation ................................................................................................................. ..............................8 2.1.2 Soil Data ................................................................................................................. ..............................1 S 2.1.3 Vegetative Problem Areas ...................................................................................... ..............................1 S 2.1.4 Stem Counts ............................................................................................................ ..............................1 S 2.2 STREAM ASSESSMENT .................................................................................................... .............................16 2.2.1 Morphologic Parameters and Channel Stability ..................................................... .............................16 2.2.2 Hydrology ................................................................................................................ .............................18 2.2.3 Photographic Documentation of Site ...................................................................... .............................18 2.2.4 Stream Stability Assessment .................................................................................... .............................19 2.3 AREAS OF CONCERN ...................................................................................................... .............................19 Tables and Exhibits Figure 1 Project Location Map Table 1 Project Mitigation Structure and Objectives Table Table 2 Project Activity and Reporting History Table 3 Project Contact Table Table 4 Project Background Table Figure 2 Project Approach Table 5 Riparian Buffer Planting List Table 6 Preliminary Soil Data Table 7 Stem Count Arranged by Plot -Year 2 (Species Survival Rates) Table 7b Stem Count Arranged by Plot -Year 2 (Planted Vs. Total) Table 8 Vegetative Problem Areas Table 9 Hydrological (Bankfull) Verifications Table 10 Stream Problem Areas Table 11 Categorical Stream Feature Visual Stability Assessment Table 12 Visual Morphological Stability Assessment Table 13 Stream Reach Morphology and Hydraulic Data Table 14 Cross - section Morphology and Hydraulic Data MICHAEL BAKER ENGINEERING, INC. II ELK BRANCH MITIGATION PROJECT- YEAR 2 MONITORING REPORT FEBRUARY 2014 Appendices Vegetation Survey Data Tables ........................................................... ..............................A Vegetation Monitoring Plot Photos ...................................................... ..............................A ProblemAreas Plan View ................................................................... ............................... B Qualitative Visual Stability Assessment Tables ................................ ............................... B Cross - section Plots with Annual Overlays ......................................... ............................... B Longitudinal Profiles with Annual Overlays ..................................... ............................... B Stream Reach Morphology and Hydraulic Data ................................. ............................... B Cross - section Morphology and Hydraulic Data .................................. ............................... B Riffle Pebble Count Size Class Distribution (Elk Branch) ................. ............................... B Stream Reference Station Photologs .................................................. ............................... B MICHAEL BAKER ENGINEERING, INC. ELK BRANCH MITIGATION PROJECT- YEAR 2 MONITORING REPORT FEBRUARY 2014 EXECUTIVE SUMMARY The Elk Branch site was restored through a full delivery contract with the North Carolina Ecosystem Enhancement Program (NCEEP). This report presents Year 2 monitoring data for the five -year monitoring period. The goals for the restoration project were as follows: • Restore or enhance headwater tributaries to Cane Creek and the French Broad Basin; • Reduce sediment and nutrient loading through restoration of riparian areas and streambanks; • Improve and restore hydrologic connections between the project streams and the floodplain; • Create geomorphically stable conditions on the Elk Branch project site; and • Improve aquatic and terrestrial habitat along the project corridor. To accomplish these goals, the following objectives were implemented: • Restore the existing trampled, straightened and relocated streams by creating stable channels with adequate grade control and access to the floodplain; • Establish buffers for nutrient removal from runoff and stabilization of streambanks to reduce bank erosion; • Improve in- stream habitat by reducing fine sediment loading from the watershed, provide a more diverse bedform with riffles and pools, create deeper pools, develop areas that increase oxygenation, provide woody debris for habitat, and reduce bank erosion; and • Improve terrestrial habitat by planting riparian areas with native vegetation and protect these areas with a permanent conservation easement and fencing, so that the riparian area will increase storm water runoff filtering capacity, improve bank stability, provide shading to decrease water temperature and improve wildlife habitat. A total of six vegetation monitoring plots 100 square meters (m) (I Om x IOm) in size were installed to evaluate survival of the woody vegetation planted on -site. The Year 2 vegetation monitoring indicated an average survival rate of 405 planted stems per acre, no volunteers were observed. The data shows that the Site is on track to meet both the interim stem survival criteria for Year 3 (320 stems per acre) and the final success criteria of 260 trees per acre by the end of Year 5. The design proposed for the Elk Branch mitigation project involved Restoration (Priority 1 & 2) and Enhancement approaches and this was completed as described in the baseline monitoring report for this site. The project should ultimately result in stable Cb and Eb -type channels for Elk Branch, UT and UT2. Longitudinal profile and cross - section data indicate that the project streams have remained stable since baseline monitoring data were collected in 2011. Additionally, as the photo logs included in this report show, herbaceous cover at the project site is dense, and in conjunction with other erosion control measures like matting, is promoting bank stability on -site while planted, woody vegetation becomes more established. Based on data collected and presented in this report, this site is currently on track to meet the other success criteria specified in the Elk Branch Mitigation Plan. Summary information and data related to the occurrence of items such as beaver impacts or encroachment, and statistics related to performance of various project and monitoring elements can be found in the tables and figures in the report appendices. Site conditions were evaluated in comparison to project success criteria; there are no project issues or concerns to report at this time. Although flow in UT2 went subsurface at one location for 20 linear feet total, Baker feels this is a large improvement over Year 1 when 103 linear feet of UT2 was observed to go subsurface. Baker will continue to monitor the status of continuous flow in the channel and EEP will be contacted should it be determined that corrective measures are needed. Narrative background and supporting information formerly found in these reports can be found in the Baseline Monitoring Report (formerly Mitigation Plan) and in the Mitigation Plan (formerly Restoration Plan) documents available on EEP's website. All raw data supporting the tables and figures in the appendices is available from EEP upon request. MICHAEL BAKER ENGINEERING, INC. IV ELK BRANCH MITIGATION PROJECT- YEAR 2 MONITORING REPORT FEBRUARY 2014 1.0 PROJECT BACKGROUND The Elk Branch mitigation site is situated in the French Broad River Basin, within North Carolina Division of Water Quality ( NCDWQ) sub -basin 04 -03 -06 and United States Geologic Survey (USGS) hydrologic unit 06010108040010. The watershed in which the Elk Branch mitigation project is located is dominated by forested land, but also contains pastures and residences. Slightly less than two - thirds of the watershed is in forested cover, leaving about one -third of the drainage in some form of pasture land or other agricultural or residential use. Elk Branch and its tributaries have been impaired by historical and recent land management practices that include timber harvesting, pasture conversion, channelization, and livestock grazing. Prior to restoration, stream channelization and dredging were evident through much of the project site, as were the impacts of open stream access by cattle and horses. A significant loss of woody streambank vegetation also occurred during the development of the land for agricultural use. Over time, these practices have contributed excessive sediment and nutrient loading to Elk Branch, Cane Creek and ultimately to the North Toe River, home to the endangered Appalachian elktoe mussel. The project involved restoration or enhancement of 3,159 linear feet (LF) primarily along three on -site streams: Elk Branch and two unnamed tributaries (UT1 and UT2). In addition, a third tributary (UT3) segment was also restored by day - lighting the tributary from the easement boundary to its confluence with Elk Branch. UT3 was impounded sometime in the past to create a small pond which flows to the easement boundary through a pipe. Elk Branch is shown as a solid blue -line stream while spring -fed tributaries UT1 and UT2 are apparent from the topography, but are not displayed on the USGS topographic quadrangle map for the site. Elk Branch, UT and UT2 were confirmed as being perennial and UT3 was considered intermittent based on field evaluations using the NCDWQ stream assessment protocol. 1.1 Location and Setting The Elk Branch project site is located about one mile northeast of Bakersville in Mitchell County, North Carolina (Figure 1). To reach the project site, follow I -26 North from Asheville for approximately 20 miles and take U.S. Highway 19N Exit 9, towards Burnsville and Spruce Pine. Continue along U.S. Highway 19 (which becomes 19 -E), for 25 miles. Turn left onto N.C. Highway 226 and continue until you reach the Town of Bakersville. Once in Bakersville, turn right (northeast) onto North Mitchell Avenue and after approximately a half mile, North Mitchell Avenue turns into Cane Creek Road. Continue another 0.7 miles, then turn left off of Cane Creek Road onto Nora Lane (SR 1219). The project site begins just below a spring head at the head of the valley, approximately 1,500 feet beyond the end of Nora Road (paved). 1.2 Mitigation Structure and Objectives Table 1 summarizes project data for each reach and restoration approach used. The design proposed for the Elk Branch mitigation project involved Restoration (Priority 1 & 2) and Enhancement approaches. Beyond a few minor changes, restoration and enhancement were completed in accordance with the approved design approach provided in the mitigation plan for this site. Field changes made were implemented in order to minimize impacts to existing resources and adapt to unmapped or changed field conditions including micro - topography, vegetation, and existing in- stream grade control. The project should ultimately result in stable Cb and Eb -type channels for Elk Branch, UT 1 and UT2. MICHAEL BAKER ENGINEERING, INC. ELK BRANCH MITIGATION PROJECT -YEAR 2 MONITORING REPORT FEBRUARY 2014 Table 1. Project Mitigation Structure and Objectives Elk Branch Miti ation Project-NCEEP Project #92665 Project on C o >~ s~ Segment or ,��, Reach ID Stationing Comment Elk Branch Adjust pattern, improve dimension by removal of Reach 1 R PI 951 LF 1.0:1 951 0 +76 -10 +50 vertical banks and increased floodplain connectivity, and restore step -pool channel via ade control and constructed riffles. Restore stable dimension to halt erosion and add Reach A 2,020 LF E LI 592 LF 1.5:1 395 10 +50 -16 +42 grade control to improve pools. Grade control structures will provide long -term channel stability Cb4 and improve instream habitat. Adjust pattern, improve dimension by removal of Reach B R P1 /2 403 LF 1.0:1 403 16 +42 -20 +60 vertical banks and increased floodplain connectivity, and restore step -pool channel via grade control and constructed riffles. Restore stable dimension to halt erosion and add Reach 2 279 LF E LI 279 LF 1.5:1 186 20 +60 -23 +39 grade control to improve pools. Grade control structures will provide long -term channel stability and improve instream habitat. UT 1 Restore channel - floodplain connectivity of previously channelized tributary. Adjustments also Reach 1 685 LF R Pi CM 656 LF 1.0:1 656 0 +06 -6 +83 made to pattern and profile to eliminate eroding streambanks and improve habitat diversity. Invasive vegetation also removed; riparian buffer restored. UT 2 Excavate previously buried section of UT2. New channel constructed with stable dimension, pattern, and profile. Priority 1 approach also applied to Reach 1 185* LF R P1 EM 242 LF 1.0:1 242 0 +92 -3 +34 existing segment of UT2 to improve channel and bank stability, as well as increased access to the floodplain. Trash and debris were removed. *buried portion not included in existing length UT 3 (New component, not in restoration plan) Daylight previously piped section of UT3 at the Reach 1 0 LF R P1 Cb4 36 LF 1.0:1 36 0 +00 -0 +36 easement boundary and run into Elk Branch Reach B with bank sloping and matting and structure for grade control. Mitigation Unit Summations Stream Riparian Wetland Nonri arian Wetland Total Wetland Buffer Comment 2,869 1 NA NA NA Notes: Elk Branch Reach 1 was broken out into smaller reaches subsequent to the submittal and approval of the restoration plan. MICHAEL BAKER ENGINEERING, INC. ELK BRANCH MITIGATION PROJECT —YEAR 2 MONITORING REPORT FEBRUARY 2014 The Elk Branch project site is located about one mile northeast of Bakersville in Mitchell County, North Carolina (Figure 1 in Appendix A). To reach the project site,follow 1 -26 North from Asheville for approximately 20 miles and take U.S. Highway 19N Exit 9,towards Burns- ville and Spruce Pine. Continue along U.S. Highway 19 (which becomes 19-E), for 25 miles. Turn left unto N.C. Highway 226 and continue until you reach the Town of Bakersville, Once in Bakersville, turn right (northeast) onto North Mitchell Avenue and after approximately a half mile, North Mitchell Avenue turns into Cane Creek Road. Continue another 0.7 miles, then turn left off of Cane Creek Road onto Nora Lane (SR 1219). The project site beginsjust below a spring head at the head of the valley, approximately 1,500 feet beyond the end of Nora Road (paved). "The subject project site is an environmental restoration site of the NCDENR Ecosystem Enhancement Program (EEP) and is encompassed by a recorded conservation easement, but is bordered by land under private ownership. Accessing the site may require traversing areas near or along the easement boundary and therefore access by the general public is not permitted. Access by authorized personnel of state and federal agencies or their designees /contractors involved in the development oversig ht and stewardship of the restoration site is permitted within the terms and timeframes of their defined roles. Any intended site visitation or activity by any person outside of these previously sanctioned roles and activities requires prior coordination with EEP." 9W FRE 19 ■ r r ■ ■ ■ r r ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ r ■ ■ ■ ■ ■ ■ �■ Project Location Inset Watershed /Repches ■ s ■ � elf Cube � p c 4 j, o ■ � � o OQ� ■ z O � (,�.j�''"\. — ■ v ■ ■ � �� n 'm s10 ■ w�p�a��li ■ Ci SR Fted 5Ps �s R ■ f ■ J59t1 Cape reek Rd -TN - �1 Elk Branch Project Site e e ■ \ \ 0601TO8040010 � -� 1 �1l i � + S ■ 4� ■ ■ I ■ i ■ ■ I\ 1\ VERY ��s Z N-'-f-oo f t 221 e TAWB r 1 j i /r tit I t ,,ATAW BA BURKE I ■ Burleson Rd "ll' viii c '.X ■ � � o SR #] 190 253 0 a ■ z O � (,�.j�''"\. — ■ v ■ ■ � �� n 'm s10 ■ w�p�a��li ■ ■ es Branch Rd ■, Fted 5Ps �s R ■ f J59t1 Ma n O 0 Map Inset LEGEND: Figure 1. Project Vicinity Map NCDWQ Sub -basin �.r - J Counties Elk Branch Restoration Project Mitchell County, NC D USGS Hydrologic Unit FF�� En` OMement Project Hydrologic Unit e...... 0 Mitchell County 0 1 2 4 Miles Mitchell County, NC i Figure 1. Notes The Elk Branch project site is located about one mile northeast of Bakersville in Mitchell County, North Carolina, North Carolina. To reach the project site, follow I -26 north from Asheville for approximately 20 miles and take U.S. Highway 19N Exit 9, towards Burnsville and Spruce Pine. Continue along U.S. Highway 19 (which becomes 19 -E), for 25 miles. Turn left onto N.C. Highway 226 and continue until you reach the Town of Bakersville. Once in Bakersville, turn right (northeast) onto North Mitchell Avenue and after approximately a half mile, North Mitchell Avenue turns into Cane Creek Road. Continue another 0.7 miles, then turn left, off of Cane Creek Road onto Nora Lane (SR 1219). The project site begins just below a spring head at the head of the valley, approximately 1,500 feet beyond the end of Nora Lane (paved). The subject project site is an environmental restoration site of the NCDENR Ecosystem Enhancement Program (EEP) and is encompassed by a recorded conservation easement, but is bordered by land under private ownership. Accessing the site may require traversing areas near or along the easement boundary and therefore access by the general public is not permitted. Access by authorized personnel of state and federal agencies or their designees /contractors involved in the development, oversight and stewardship of the restoration site is permitted within the terms and timeframes of their defined roles. Any intended site visitation or activity by any person outside of these previously sanctioned roles and activities requires prior coordination with EEP. MICHAEL BAKER ENGINEERING, INC. ELK BRANCH MITIGATION PROJECT -YEAR 2 MONITORING REPORT FEBRUARY 2014 Anthropogenic land use alteration, such as deforestation, channelization of streams for agricultural purposes, and prolonged open stream access to livestock has resulted in various stream corridor impairments. Stream channel incision, bank destabilization and erosion, loss of in- stream and riparian habitat, and loss of shading and buffering capacity functions were present throughout the project area. In accordance with the approved mitigation plan for the site, construction activities began in May 2011. Project activity on Elk Branch Reach 1, Reach B, UT 1, UT2, and UT3 consisted of making adjustments to channel dimension, pattern, and profile typically using a Priority 1 Restoration approach. A Level I Enhancement approach was used on Elk Branch Reaches A and 2 to re- establish adequate channel dimension for bank stability and floodplain access, while recreating a stable channel profile and bedform using a step -pool restoration approach that features grade control structures and constructed riffles. The creation of a step -pool channel profile was used to achieve vertical stability and eliminate self - propagating headcuts previously found within the site. This was the primary method for promoting improved stability, water quality, and habitat goals. In- stream structures (constructed riffles, boulder steps, log vanes, log drops, and log rollers) were used to control streambed grade, reduce stresses on streambanks, and promote diversity of bedform and habitat. Structures were spaced at a distance that replicated natural pool to pool spacing and allowed downstream headers to protect the upstream structure footer to create long term vertical stability. Stream dimensions were adjusted to eliminate vertical banks and erosion resulting from excessive shear stress and lack of floodplain relief. Streambanks were stabilized using a combination of erosion control matting, bare -root planting, transplants, and live staking. Transplants will provide living root mass quickly to increase streambank stability and create shaded holding areas for fish and aquatic biota. Where feasible, plan form adjustments were made to correct prior channelization by making slight adjustments to channel pattern (step -pool channels have a low sinuosity). These modifications will allow flows larger than bankfull to spread onto the restored floodplain, dissipating flow energies and reducing streambank stress. Native vegetation was planted across the site, and the entire mitigation site is protected through a permanent conservation easement. 1.3 Project History and Background The chronology of the Elk Branch mitigation project is presented in Table 2 while the contact information for designers, contractors and plant material suppliers is presented in Table 3. Relevant project background information is presented in Table 4. The total as -built stream length across the project is 3,159 LF. Table 2. Project Activity and Reporting History Elk Branch Mitigation Project-NCEEP Project #92665 Activity or Report Data Collection Complete Completion or Delivery Restoration Plan December 2009 Final Design -90% December 2009 Construction June 2011 Temporary S &E mix applied to entire project area June 2011 Permanent seed mix applied to project site June 2011 Installation of crest gauges July 2011 Plantings set out January 2012 January 2012 Mitigation Plan / As -built (Year 0 Monitoring — baseline) July 2011 /January 2012 April 2012 Year 1 Monitoring October 2012 December 2012 Year 2 Monitoring November 2013 February 2014 MICHAEL BAKER ENGINEERING, INC. ELK BRANCH MITIGATION PROJECT -YEAR 2 MONITORING REPORT FEBRUARY 2014 Table 2. Project Activity and Reporting History Elk Branch Mitigation Project -NCEEP Project #92665 Year 3 Monitoring Year 4 Monitoring Year 5 Monitoring Table 3. Project Contacts Project County Elk Branch Mitigation Project -NCEEP Project #92665 Principal -In- Charge Blue Ridge Ecoregion 797 Haywood Rd Suite 201, Asheville, NC 28806 Michael Baker Engineering, Inc. French Broad USGS HUC for Project Contact: Micky Clemmons, Tel. 828.350.1408 x2002 Designer 04 -03 -06 Within extent of EEP Watershed Plan? 797 Haywood Rd Suite 201, Asheville, NC 28806 Michael Baker Engineering, Inc. Cold % of Project Easement Fenced or Demarcated Contact: Matthew Reid, Tel. 828.350.1408 x2006 Construction Contractor No Drainage Area (Square Miles) 6105 Chapel Hill Road; Raleigh, NC 27607 River Works, Inc. .07 mil Contact: Bill Wright, Tel. 919.818.6686 Planting & Seeding Contractor 6105 Chapel Hill Road; Raleigh, NC 27607 River Works, Inc. Contact: George Morris, Tel. 919.459.9001 Seed Mix Sources Green Resources Nursery Stock Suppliers Arborgen and Hillis Nursery Monitoring 797 Haywood Rd Suite 201, Asheville, NC 28806 Michael Baker Engineering, Inc. Contact: Matthew Reid, Tel. 828.350.1408 x2006 Table 4. Project Attribute Elk Branch Mitigation Project -NCEEP Project #92665 Project County Mitchell County, NC Physiograhic Region Blue Ridge Ecoregion Blue Ridge Mountains - Southern Crystalline Ridges and Mountains Project River Basin French Broad USGS HUC for Project 6010108040010 NCDWQ Sub -basin for Project 04 -03 -06 Within extent of EEP Watershed Plan? In a TLW (French Broad River Basin Priorities Report - 2009 WRC Class Cold % of Project Easement Fenced or Demarcated 100% (-60% fenced, 40% demarcated) Beaver Activity Observed During Design Phase? No Drainage Area (Square Miles) Elk Branch Reach 1 .07 mil MICHAEL BAKER ENGINEERING, INC. ELK BRANCH MITIGATION PROJECT -YEAR 2 MONITORING REPORT FEBRUARY 2014 Table 4. Project Attribute Elk Branch Mitigation Project-NCEEP Project #92665 Reach A Reach B Elk Branch Reach 2 .14 mil UT1 .06 mil UT2 .01 mil Stream Order Elk Branch- ls`, UT1 -Zero, UT2 -Zero, UT3 -Zero Restored Length Elk Branch Reach 1 951 LF Reach A 592 LF Reach B 403 LF Elk Branch Reach 2 279 LF UT1 656 LF UT2 242 LF UT3 36 LF Perennial or Intermittent Perennial Watershed Type Rural (Predominantly Forested) Watershed LULC Distribution (Percent area) Forest 57% Shrub 6% Pasture /Crops 33% Developed Open Space 4% Drainage Impervious Cover Estimate %) <10% NCDWQ AU /Index # 7- 2 -59 -8 303d Listed No Upstream of 303d Listed Segment No Reasons for 303d Listing or Stressor - Total Acreage of Easement 9.46 Total Vegetated Acreage w /in Easement Easement vegetated with exception of stream channel and a ford crossings within an easement breaks Total Planted Acreage within the Easement —4 Acres (remainder already forested) Rosgen Classification (Pre- existing) Elk Branch Cb /B /G/Eb UT 1 Fb UT2 B UT3 Piped Rosgen Classification of As -built Elk Branch -Reach 1 Cb4 Reach A Cb4 Reach B Cb4 Elk Branch -Reach 2 Cb4 UTl Cb4 MICHAEL BAKER ENGINEERING, INC. ELK BRANCH MITIGATION PROJECT -YEAR 2 MONITORING REPORT FEBRUARY 2014 Table 4. Project Attribute Elk Branch Mitigation Project-NCEEP Project #92665 UT2 Eb4 UT3 Cb4 Valley Type II Valley Slope .03 (Elk Branch), .04 (UT 1), .04 (UT2) Valley Side Slope Range n/a Valley Toe Slope Range n/a Trout Waters Designation Yes ( Elk Branch is a tributary to designated trout waters) Species of Concern No 1.4 Monitoring Plan View The current conditions plan view depicts the monitoring features for the Elk Branch mitigation project. The plan set will also be used to identify locations where stream and vegetation problem areas are present. At this time, no problems areas are present. Figure 2 illustrates the project as it is delineated by reach. 2.0 PROJECT CONDITION AND MONITORING RESULTS The five -year monitoring plan for the Elk Branch mitigation project includes criteria to evaluate the success of the vegetation and stream components of the project. The specific locations of vegetation plots, permanent cross - sections, reference photo stations and crest gauges are shown on the Year 2 Current Condition Plan View submitted with this report. 2.1 Vegetation Assessment 2.1.1 Vegetation Successful restoration of the vegetation on a site is dependent upon hydrologic restoration, active planting of preferred canopy species, and volunteer regeneration of the native plant community. In order to determine if the criteria are achieved, six vegetation monitoring quadrants were installed across the restoration site. The size of individual quadrants vary from 100 square meters for tree species to 1 square meter for herbaceous vegetation. Vegetation monitoring will occur in spring, after leaf -out has occurred, or in the fall prior to leaf fall. Individual quadrant data provided during subsequent monitoring events will include diameter, height, density, and coverage quantities. Relative values will be calculated, and importance values will be determined. Individual seedlings will be marked to ensure that they can be found in succeeding monitoring years. Mortality will be determined from the difference between the previous year's living, planted seedlings and the current year's living, planted seedlings. Photographs are used to visually document vegetation success in sample plots. Reference photos of tree and herbaceous condition within plots are taken at least once per year. Photos of the plots are included in Appendix A of this report. The interim measure of vegetative success for the site is the survival of at least 320, 3 -year old, planted trees per acre at the end of the Year 3 monitoring period. The final vegetative success criteria is the survival of 260, 5 -year old, planted trees per acre at the end of the Year 5 monitoring period. If the measurement of vegetative density proves to be inadequate for assessing plant MICHAEL BAKER ENGINEERING, INC. ELK BRANCH MITIGATION PROJECT -YEAR 2 MONITORING REPORT FEBRUARY 2014 x� p� N k C S p c +D 41n C m k +F- 0 N \ + n �FF-I z � D D FT1 O N 0 +O Co O Q zOz y+ 00 -i z n l� Q O F Oz> c� z _< + ' U1� 10 �i w X11 kl I�kk11 D �, z �I J L�- 07 X rn MEN cn < < m m �J G7 G7 D D D O O � z z 0 7 0 0 � z K: 0 7 M M D Z 7 D m 0 O j n o MAT CHINE SHEET 2 ST I f D A. 8 +00 m -T1 w o rn 0 m o m m m Prepared for ELK BRANCH RESTORATION PROJECT o A 0 Ecosystem Enhancement Program ' Michael Baker Engineering Inc. N- < Z Z MITCHELL COUNTY, NORTH CAROLINA m mo _'o N m 2728 Capitol Blvd., Suite 1H 103 NC Engineering License F -1084 O O j o 797 Haywood Road, Suite 201 m " N o° o Z Raleigh, NO 27604 m o o Con p Phone: 919 -715 -0476 CURRENT CONDITION PLAN VIEW I Ashevine,Northcarolina28806 A �' } Phone: 828.350.1408 3 Fax: 919-7115-22119 Q�y .s em Fax: 828.350.1409 ��� 1'l 7aTC.eIl1+L'y' YEAR 2 MONITORING 0 D D Fri G7 = Z7 0 Cl) � 0 O O = U) 7 C C O Cr) 70 D —1-1 x o o cn < O m D -0 z p o o �z k� O 1 z M �7m co Cl) D M M z K 77\ m z MEN cn < < m m �J G7 G7 D D D O O � z z 0 7 0 0 � z K: 0 7 M M D Z 7 D m 0 O j n o MAT CHINE SHEET 2 ST I f D A. 8 +00 m -T1 w o rn 0 m o m m m Prepared for ELK BRANCH RESTORATION PROJECT o A 0 Ecosystem Enhancement Program ' Michael Baker Engineering Inc. N- < Z Z MITCHELL COUNTY, NORTH CAROLINA m mo _'o N m 2728 Capitol Blvd., Suite 1H 103 NC Engineering License F -1084 O O j o 797 Haywood Road, Suite 201 m " N o° o Z Raleigh, NO 27604 m o o Con p Phone: 919 -715 -0476 CURRENT CONDITION PLAN VIEW I Ashevine,Northcarolina28806 A �' } Phone: 828.350.1408 3 Fax: 919-7115-22119 Q�y .s em Fax: 828.350.1409 ��� 1'l 7aTC.eIl1+L'y' YEAR 2 MONITORING MATCHLWE SHEET STq, 8-I.00 nj O O �j I�b `\ m Q) \ \ w' °o mo \\ :jl I Qo� \ \ x \ \ cA m o z ) \ ',° w / 1 I I t I D ° _ ° �z o Fri C: (j) � i � � 1, O o n O m-i I \ O -4 -0 z O O ri . ,DOS \ O z z o�rz F— co z � � z \� O \\ \` W ■ C o m m CD 0 0 / C --i --i FT1 D D z '�' �D� � o 0 n F- o 0 00 N O / o 0 LU N OO —� 'o m z O D O m O O — F— + D oz> ��' M �z ° XS2 W D C % IT1 4 to �w ;7 + Cn k0 k - I -F- O �o W (A W I1 � \\ 'n 1 O W tO IcTI i o ° ni r C/) k 00 F- ,NE SNEE m o 0 o Prepared tor: ELK BRANCH RESTORATION PROJECT S A n Ecosystem Enhancement Program ` Michael Baker Engineering Inc. 0 N o z m —' o ° 2728 Capitol Blvd., Suite 1H 103 MITCHELL COUNTY, NORTH CAROLINA NC Engineering License F -1084 O O { o ° N o 0 Raleigh, INC 27604 797 Haywood Road, Suite 201 N) o°o M o Phone 919- 715 -0476 CURRENT CONDITION PLAN VIEW Asheville, North Carolina 28806 A (n.. 61 o CA Phone: 828.350.1408 n dA Fax 919- 715 -2219 7577�'I {17 YEAR 2 MONITORING Fax: 828.350.1409 s, ;�� 141 ,,l lI+�.. n C �J z D D ;ou F7 0 F- M MN 7 + < 0 C)D 00 ;oJ zOz 0 +�ou -_ �z> C I�1 �I Aj x X X z 0 D F- > x Z M D M r 0 m E:1 PO X cj� im < -0 C7 D D C7 FTl = �;j C/) (n O m 0 CDWz 0o Cn O Cn O (n 0O Z m D O 0 z O r O Z OZ O m Z 7DF71 D r m co z (n D M F1 z K -T 7-\ F1 Z rn M m 0 c-) FTI Fri cc D D m O O z z t Nom. A °< Z ' 0 0 Ecosystem Enhancement Program ° —i MITCHELL COUNTY, NORTH CAROLINA z K: Michael Baker Engineering Inc. o m 7 o 2728 Capitol Blvd., Suite 1H 103 � z m NC Engineering License F -1084 O O - o ° -t o O � co z Raleigh, NC 27604 � CURRENT CONDITION PLAN VIEW � 797 Haywood Road, Suite 201 Asheville,NOrthCarolina28806 D , �, o fTl Phone: 919 -715 -0476 } D 0 (A C) o D r m -T W o rn 0 cc ° ° m Prepared tor: ELK BRANCH RESTORATION PROJECT t Nom. A °< Z ' ' Ecosystem Enhancement Program ° MITCHELL COUNTY, NORTH CAROLINA Michael Baker Engineering Inc. m co o 2728 Capitol Blvd., Suite 1H 103 NC Engineering License F -1084 O O - o ° -t o O � co py »' rn o Raleigh, NC 27604 � CURRENT CONDITION PLAN VIEW � 797 Haywood Road, Suite 201 Asheville,NOrthCarolina28806 cn , �, o cn Phone: 919 -715 -0476 } Phone: 828.35009 K: �x Fax: 919 -715 -2219 lQn� I I ;11�3�11 t']ll�'. YEAR 2 MONITORING Fax: 828.350.1409 CA O DD n C� (n m O O 07 OJ � C D D F- M O D m W n O Fri � -0 0 z O z F71 O 9 -Tj�7 0 D 0o z cn D m m z z � Cf� F7 z NC Engineering License F -1084 797 Haywood Road, Suite 201 v < < a 0) Z D 0 0 Asheville, North Carolina 28808 O V p o O O O O N CURRENT CONDITION PLAN VIEW I Phone: 828.350.1408 z 0 0 + C d �L[']]� O m Fax: 828.350.1409 00--j-1 �z0 M M z O n 0 � D F- M Z77 c� z D c� z CA O DD n 0 (n m O O 07 OJ � 0 D D F- M O D m W n O Fri � -0 0 z O z rn O 9 -Tj�7 0 9 X < -0 O DD n fT1 = n Z) cn cn O m O O 07 OJ � O C C D cn � � � A ~ O D m --1 n D z n O Fri � -0 O z O z F- 0 z i O 9 -Tj�7 D 0o z cn D m m z � 2728 Capitol Blvd., Suite 1H 103 m z NC Engineering License F -1084 797 Haywood Road, Suite 201 v < < a 0) Z Raleigh, NO 27604 0 0 Asheville, North Carolina 28808 A V p o cn 9 O O Phone: 919 -715 -0476 z z CURRENT CONDITION PLAN VIEW I Phone: 828.350.1408 0 0 A z K: d �L[']]� O m Fax: 828.350.1409 � z M M z n � D M Z77 D D ° Prepared tor: ELK BRANCH RESTORATION PROJECT A ~ fV o. o z z v Ecosystem Enhancement Program ''` MITCHELL COUNTY, NORTH CAROLINA Michael Baker Engineering Inc. zt 2728 Capitol Blvd., Suite 1H 103 NC Engineering License F -1084 797 Haywood Road, Suite 201 v a 0) Z Raleigh, NO 27604 Asheville, North Carolina 28808 A o cn 9 Phone: 919 -715 -0476 } CURRENT CONDITION PLAN VIEW I Phone: 828.350.1408 h��� A Fax: 919 -715 -2219 d �L[']]� YEAR 2 MONITORING Fax: 828.350.1409 community health, additional plant community indices may be incorporated into the vegetation monitoring plan as requested by the NCEEP. Temporary seeding applied to streambanks beneath the erosion matting sprouted within two weeks of application and has provided good ground coverage. Live stakes and bare root trees planted are also providing streambank stability. Bare -root trees were planted throughout the conservation easement. A minimum 60- foot -wide conservation easement was established along the project streams during initial design (this is in addition to the stream width). After final design, a buffer width of 30 feet on either side of the stream was achieved in most areas. In some areas, regulatory comments or ultimate field design changes resulted in varying buffer widths. In general, bare -root vegetation was planted at a target density of 537 stems per acre, in a 9 -foot by 9 -foot grid pattern. Planting of bare -root trees was completed in January 2012. Species planted are listed below. Table 5. Riparian Buffer Plantings Elk Branch Mitigation Project- NCEEP Project #92665 ,—Common Name cientific Name % Planted by Planting Density Acer rubrum Red Maple 10% 54 Betula ni ra River Birch 7% 38 Car inns caroliniaun Ironwood 7% 38 Ca rya ovata Shagbark Hickory 5% 27 Cornus orida Flowering Dogwood 5% 27 Diospyros vir iniana Persimmon 5% 27 Lindera benzoin S icebush 5% 27 Liriodendron tulipfera Tulip Poplar 5% 27 N ssa s lvatica Black um 5% 27 Platanus occidentalis Sycamore 8% 43 uercus alba White Oak 5% 27 uercus rubs Red Oak 5% 27 Understory /Shrub Species Alnus serrulata Tag Alder 10% 54 Cal canthus oridus Sweetshrub 13% 70 Sambucus canadensis Elderberry 5% 27 Riparian Livestake Plantings Cornus amomum Silky Dogwood 40% 215 Salix sericea Silky Willow 30% 161 Salix ni ra Black Willow 100/0 54 Sambucus canadensis I Elderberry 20% 108 MICHAEL BAKER ENGINEERING, INC. 14 ELK BRANCH MITIGATION PROJECT -YEAR 2 MONITORING REPORT FEBRUARY 2014 2.1.2 Soil Data Table 6. Preliminary Soil Data Elk Branch Mitigation Project - NCEEP Project #92665 Dominant Soil Series and Characteristics Bandana/ Fannin/Saunook- Thunder /Saunook Depth (in. ) % Clay K Factor T Factor % OM Elk Branch Reach 1 >60" 7- 20/12 -27, 5 -35 .24/.05,.32 5 4 -10 Reach A >60" 7- 20/12 -27, 5 -35 .24/.05,.32 5 0 -10 Reach B >60" 7- 20/12 -27, 5 -35 .24/.05,.32 5 4 -10 Elk Branch Reach 2 >60" 7- 20/12 -27, 10 -20 .24/.05,.2 5,4 4 -10 UT1 >60" 7- 20/12 -27 .24/.05 5 0 -10 UT2 >60" 7- 20/12 -27, 12 -35 .24/.05,.15-.32 5 4 -10 2.1.3 Vegetative Problem Areas Currently, there are no vegetative problem areas. 2.1.4 Stem Counts The mitigation plan for the Elk Branch Site specifies that the number of quadrants required will be based on the species /area curve method, as described in NCEEP monitoring guidance documents. The size of individual quadrants is 100 square meters for woody tree species, and 1 square meter for herbaceous vegetation. A total of six vegetation plots, each 10 by 10 meters or 5 by 20 meters in size, were established across the restored site. 2.1.4.1.1.1 Results Table 7 in Appendix A presents information on the stem counts for each of the vegetation monitoring plots. Data from the Year 2 monitoring event showed a range of 202 -607 planted stems per acre, with approximately 86% of the stems showing no signs of damage. The average density of planted bare root or livestake stems, based on data collected from the six monitoring plots during Year 2 monitoring, is 405 stems per acre which indicates that the Site is on track to meet the minimum interim success criteria of 320 trees per acre by the end of Year 3 and the final success criteria of 260 trees per acre by the end of Year 5. The locations of the vegetation plots are shown on the Year 2 Current Condition Plan View. As shown in Table 8 (Appendix A), no woody or herbaceous vegetation problem areas were identified during Year 2 monitoring. Although the density of herbaceous cover varies across the site, conditions observed during the Year 2 monitoring survey found ground cover in the easement area to be sufficient for aiding in site stabilization. Based on the plot data collected, plots 2 and 3 are not currently meeting the success criteria with 202 and 283 trees per acre respectively. The lower density recorded is likely attributed to the orientation in which bare roots were planted in relation to the layout of these 5x20' vegetation plots, and the measurement of stem offsets (9'x9') as described in the Baseline Monitoring Document. Wet conditions from ground water near the surface may also be the cause of vegetation mortality in plot 2. In other instances, lower densities can be attributed to damage brought about by animals and competition with dense herbaceous cover. EEP expressed concerns of low planting density throughout the easement area. This perception of low planting densities can be attributed to the slow growth of trees and the thick herbaceous vegetation that makes it difficult to identify the individual trees. Survival rates of planted woody stems in the vegetation plots indicate that plantings across the easement area are of sufficient density to meet regulatory requirements, as well as the site stabilization and habitat enhancement goals originally set forth in the mitigation plan. The eventual onset of volunteer trees will MICHAEL BAKER ENGINEERING, INC. 15 ELK BRANCH MITIGATION PROJECT -YEAR 2 MONITORING REPORT FEBRUARY 2014 further aid in site stabilization and habitat improvements. Additional trees will be planted in areas not meeting the success criteria in Fall 2014. A photo log of the vegetation plots is provided in Appendix A. 2.2 Stream Assessment 2.2.1 Morphologic Parameters and Channel Stability Geomorphic monitoring of restored stream reaches is being conducted over a five year period to evaluate the effectiveness of the restoration practices installed. Monitored stream parameters include channel dimension (cross- sections), profile (longitudinal survey), pattern, bed composition, bank stability, bankfull flows, and stability of reference sites documented by photographs. Crest gauges, as well as high flow marks, will be used to document the occurrence of bankfull events. The methods used and any related success criteria are described below for each parameter. To monitor stream success criteria, eleven permanent cross - sections, six longitudinal profile sections and two crest gauges were installed. 2.2.1.1 Dimension Eleven permanent cross - sections were installed to help evaluate the success of the mitigation project and measured data are provided in Appendix B. Permanent cross - sections were established throughout the project site as follows: five cross - sections were located on Elk Branch, four cross - sections were located on UT1 and two cross - sections were located on UT2. Cross- sections selected for monitoring were located in representative riffle and pool reaches, and each cross - section was marked on both banks with permanent pins to establish the exact transect to be used year -to -year. A common horizontal and vertical reference will be used for cross - sections and consistently referenced to facilitate comparison of year -to -year data. The cross - sectional surveys will include points measured at all breaks in slope, including top of bank, bankfull, inner berm, edge of water, and thalweg, if the features are present. Riffle cross - sections are classified using the Rosgen Stream Classification System. Although minor changes are not uncommon, there should not be any significant changes in the as -built cross - sections. If changes do take place, they will be evaluated to determine if they represent a movement toward a more unstable condition (e.g., down- cutting or erosion) or a movement toward increased stability (e.g., settling, vegetative changes, deposition along the banks, or decrease in width/depth ratio). At this time, cross - sectional measurements do not indicate any streambank or channel stability issues. 2.2.1.1.1 Results As -built cross - section monitoring data for stream stability was collected in July 2011. The eleven permanent cross - sections along the restored channels were resurveyed in November 2013 to document stream dimension for Monitoring Year 2. Cross- sectional data is presented in Appendix B and the location of cross - sections is shown on the plan sheets submitted with this report. The cross - sections show that there has been little to no adjustment to stream dimension across the project reaches since construction. What adjustment that has occurred has primarily been observed in riffle cross - sections that are exhibiting signs of narrowing. Based on field observation, this narrowing can be attributed to herbaceous vegetation becoming well established. At this time, cross - sectional measurements do not indicate any streambank or channel stability issues. 2.2.1.2 Pattern and Longitudinal Profile Longitudinal profiles for Year 2 were surveyed during November 2013; profiles of the various project reaches are provided in Appendix B. A longitudinal profile was completed MICHAEL BAKER ENGINEERING, INC. 16 ELK BRANCH MITIGATION PROJECT -YEAR 2 MONITORING REPORT FEBRUARY 2014 for the entire project length of Elk Branch, UT and UT2 to evaluate changes in channel bed conditions since the as -built survey was completed. Longitudinal profiles will be replicated annually during the five year monitoring period. Measurements taken during longitudinal profiles include thalweg, water surface, and top of low bank. The pools should remain relatively deep with flat water surface slopes, and the riffles should remain steeper and shallower than the pools. Bed form observations should be consistent with those observed for channels of the design stream type. Profile data collected reflect stable channel bedform and a diverse range of riffle and pool complexes. All measurements were taken at the head of each feature (e.g., riffle, run, pool, or glide) and at the maximum pool depth. Elevations of grade control structures were also included in longitudinal profiles surveyed. Surveys were tied to permanent horizontal and vertical control. The longitudinal profiles show that the bed features are stable. Where the channel slopes are steeper, closely- spaced grade control structures should help maintain the overall profile desired and there was no notable bank erosion observed as a result of the channel profile adjustments. Although pattern adjustments were made, Elk Branch and its tributaries are primarily Cb -type streams characterized by step -pool sequences, and increased sinuosity is not a design goal, nor a typical characteristic of this channel type. Pattern information is not provided in Appendix B, as this information is generally only provided for meandering, alluvial channels. Nevertheless, as the site is monitored, reaches will be evaluated for significant changes in pattern and any changes warranting repair work will be discussed in future monitoring reports. 2.2.1.2.1 Results The longitudinal profiles show that the bed features are also stable across the project site. As noted in the Stream Reach Morphology Data Tables in Appendix B (Tables 13 and 14), riffle and pool characteristics do not appear to have changed much and are acceptable when compared to reference reach and design data provided for the project reaches. Higher rainfall this year has resulted in increased flows that have resulted in increased depth of pools on all profiles during this year. This is a positive change that has provided improved pool habitat for aquatic organisms. Given the location of these project reaches in the valley and the spacing of structures in these streams, it is expected that the profiles will display little change over the course of the monitoring period. As the profile for UT2 demonstrates, there was one section where the flow went subsurface for 20 linear feet. This is a considerable improvement from the Year 1 Monitoring survey data that indicated UT2 flow was subsurface for 103 linear feet. Record precipitation was received during the 2013 monitoring year which provided flows that helped to move sediment and fines through the system. These increased flows helped seal any structures where water was discovering a subsurface path to follow. The area where flow goes subsurface is noted in Appendix B (Table 10). Other than the lack of continuous surface flow, UT2 appears stable. No other areas of instability were noted in the project area during Year 2 monitoring. 2.2.1.3 Substrate and Sediment Transport Bed material analysis consists of conducting a pebble count in the same constructed riffle during annual geomorphic surveys of the project site. This sample will reveal changes in sediment gradation that occur over time as the stream adjusts to upstream sediment loading and transport out of the study reaches. Significant changes in sediment gradation will be evaluated with respect to stream stability and watershed changes. MICHAEL BAKER ENGINEERING, INC. 17 ELK BRANCH MITIGATION PROJECT -YEAR 2 MONITORING REPORT FEBRUARY 2014 2.2.1.3.1 Results For this project, a pebble count was collected in Reach A of Elk Branch. As noted in pebble count exhibit in Appendix B, the pebble count for Reach A of Elk Branch indicates a general coarsening of the bedload. Visual observations of Elk Branch and its tributaries and a review of pebble count data collected did not yield any signs that sediment transport functions have been hampered by the mitigation project; specifically, no significant areas of aggradation or degradation within the project area were observed during the Year 2 monitoring survey. 2.2.2 Hydrology 2.2.2.1 Streams The occurrence of bankfull events within the monitoring period is being documented by the use of crest gauges and photographs. Crest gauges were installed on the floodplain at bankfull elevation. One crest gauge was placed near the end of Reach 2 of Elk Branch while another gauge was set up near the end of the project area on UT1 to Elk Branch. The crest gauges will record the highest watermark between site visits and will be checked at each site visit to determine if a bankfull event has occurred. Photographs will be used to document the occurrence of debris lines and sediment deposition on the floodplain during monitoring site visits. Two bankfull flow events must be documented on each crest gauge within the 5 -year monitoring period. The two bankfull events must occur in separate years; otherwise, the stream monitoring will continue until two bankfull events have been documented in separate years. 2.2.2.1.1 Results Since the time of the As -built survey, the Site was found to have had at least two bankfull events based on crest gauge readings obtained on the mainstem and UT 1. Information on these events is provided in Table 9 of Appendix B. 2.2.3 Photographic Documentation of Site Photographs will be used to document restoration success visually. Reference stations were photographed during the as -built survey; this will be repeated for at least five years following construction. Reference photos are taken once a year, from a height of approximately five to six feet. Permanent markers will ensure that the same locations (and view directions) are utilized during each monitoring period. Selected site photographs are shown in Appendix B. 2.2.3.1 Lateral Reference Photos Reference photo transects were taken of the right and left banks at each permanent cross - section. A survey tape was captured in most photographs which represents the cross - section line located perpendicular to the channel flow. The water line was located in the lower edge of the frame in order to document bank and riparian conditions. Photographers will make an effort to consistently maintain the same area in each photo over time. 2.2.3.2 Structure Photos Photographs of primary grade control structures (i.e. vanes and weirs), along the restored streams are included within the photographs taken at reference photo stations. Photographers will make every effort to consistently maintain the same area in each photo over time. Lateral and structure photographs are used to evaluate channel aggradation or degradation, bank erosion, success of riparian vegetation, structure function and stability, and a subjective MICHAEL BAKER ENGINEERING, INC. 18 ELK BRANCH MITIGATION PROJECT -YEAR 2 MONITORING REPORT FEBRUARY 2014 judgment of the effectiveness of erosion control measures. Lateral photos should not indicate excessive erosion or degradation of the banks. A series of photos over time should indicate successive maturation of riparian vegetation and consistent structure function. 2.2.3.2.1 Results Photographs of the restoration project were taken in November 2013. The photographs illustrate stable conditions across the project site. Vegetative growth along the streambanks and riparian buffers has become dense and improved since construction was completed in 2011. Structures are functioning as designed. 2.2.4 Stream Stability Assessment In- stream structures installed within the restored streams included constructed riffles, log drops, log sequences, and boulder steps. The Year 2 visual observations of these structures indicate that little or no changes have occurred since the baseline survey was performed; structures are functioning as designed and are holding their elevation and grade. Frequent spacing of log drops, log sequences and boulder drops have greatly enhanced bedform diversity as well as promoting more stable C and B -type channels. The Categorical Stream Feature Visual Stability Assessment and Visual Morphological Stability Assessment tables in Appendix B (Tables 11 and 12), summarize the condition of project structures. Quantitative reference reach and design data used to determine the restoration approach, as built data, as well as Year 2 monitoring data are summarized in Tables 13 and 14 of Appendix B. 2.3 Areas of Concern At this time, there are no areas of concern. As previously noted in the As -built report, additional planting was proposed if further evaluation of the site indicated stem density was insufficient to meet the vegetation success criteria set forth in this report across the entire site. Based on Year 2 monitoring data, increasing stem density by planting additional trees is unnecessary at this time. MICHAEL BAKER ENGINEERING, INC. 19 ELK BRANCH MITIGATION PROJECT -YEAR 2 MONITORING REPORT FEBRUARY 2014 APPENDIX A 1. VEGETATION SURVEY DATA TABLES 2. VEGETATION MONITORING PLOT PHOTOS �•a•a�000aoa ®����� � ©�oo�om ®m�aaa•� r�oo��oaoaa�aaa•� 000 ooa 000 000 �a•���o�a000�aaa•� aao ©a ®000 aaa ���0oa ®aa�aaa•� r•��a• oo ®��� 000 000 000 �o��o� ��� 000 ® ®a�aaa•� 000 aaa r��a• oo ©��� ooa 000 ��� 000 oaa aaa aaa ���� 000 ooa 000 000 ��� aao ©a ®000 aaa r•��a• oo ®��� 000 000 000 ��� 000 000 aaa r��a• oo ©��� ooa 000 ��� 000 oaa aaa aaa m��a• 000 000 ��� ��� o -v ��� 000 000 aaa ®��a• ��� ��� ��� ��� as ®��� aaa aaa 000 • ��a•000a�a��aa��000���0000aoa ©® r��a• ��� ��� ooa ��� oo ®��� ©aa aaa aaa ® ®m aoa ©va aoo ® ® ® ® ® ®mam aaa Dam 0 0 0 ®00 000 aoa ooa ®® ©000 ®oo ©© ®aoo a ©® • Table 8. Vegetation Problem Areas Elk Branch Mitigation Project: Project No. 92665 Elk Branch Reach 1 (951 LF) Feature Issue Station No. Suspected Cause Photo Number Other N/A N/A N/A Bare Bank N/A N/A N/A Bare Bench N/A N/A N/A Bare Flood Plain N/A N/A N/A Invasive /Exotic Populations N/A N/A N/A Elk Branch Reach A (592 LF) Feature Issue Station No. Suspected Cause Photo Number Other N/A N/A N/A Bare Bank N/A N/A N/A Bare Bench N/A N/A N/A Bare Flood Plain N/A N/A N/A Invasive /Exotic Populations N/A N/A N/A Elk Branch Reach B (403 LF) Feature Issue Station No. Suspected Cause Photo Number Other N/A N/A N/A Bare Bank N/A N/A N/A Bare Bench N/A N/A N/A Bare Flood Plain N/A N/A N/A Invasive /Exotic Populations N/A I N/A N/A Elk Branch Reach 2 (186 LF) Feature Issue Station No. Suspected Cause Photo Number Other N/A N/A N/A Bare Bank N/A N/A N/A Bare Bench N/A N/A N/A Bare Flood Plain N/A N/A N/A Invasive /Exotic Populations N/A I N/A N/A UT1 to Elk Branch (656 LF) Feature Issue Station No. Suspected Cause Photo Number Other N/A N/A N/A Bare Bank N/A N/A N/A Bare Bench N/A N/A N/A Bare Flood Plain N/A N/A N/A Invasive /Exotic Populations N/A N/A N/A UT2 to Elk Branch (242 LF) Feature Issue Station No. Suspected Cause Photo Number Other N/A N/A N/A Bare Bank N/A N/A N/A Bare Bench N/A N/A N/A Bare Flood Plain N/A N/A N/A Invasive /Exotic Populations N/A N/A N/A UT3 to Elk Branch (36 LF) Feature Issue Station No. Suspected Cause Photo Number Other N/A N/A N/A Bare Bank N/A N/A N/A Bare Bench N/A N/A N/A Bare Flood Plain N/A N/A N/A Invasive /Exotic Populations N/A N/A N/A Elk Branch Mitigation Project Photo Log - Vegetation Plot Photo Points (Year 2) Notes: 1. Vegetation plots marked by t -posts at corners; herbaceous plot marked by stake within larger plot. 2. Planted vegetation flagged and tagged for future identification. 10/24/2013 Photo 1: Veg Plot 1 10/24/2013 Photo 2: Veg Plot 1: Herbaceous Plot 10/24/2013 Photo 3: Veg Plot 2 10/24/2013 Photo 4: Veg Plot 2: Herbaceous Plot 10/24/2013 Photo 5: Veg Plot 3 10/24/2013 Photo 6: Veg Plot 3: Herbaceous Plot 10/24/2013 Photo 7: Veg Plot 4 10/24/2013 Photo 9: Veg Plot 5 10/24/2013 Photo 11: Veg Plot 6 10/24/2013 Photo 8: Veg Plot 4: Herbaceous Plot 10/24/2013 Photo 10: Veg Plot 5: Herbaceous Plot 10/24/2013 Photo 12: Veg Plot 6: Herbaceous Plot APPENDIX B 1. HYDROLOGICAL (BANKFULL) VERIFICATIONS (TABLE 9) 2. STREAM PROBLEM AREAS (TABLE 10) 3. CROSS - SECTION PLOTS WITH ANNUAL OVERLAYS 4. LONGITUDINAL PROFILES WITH ANNUAL OVERLAYS 5. CATEGORICAL STREAM FEATURE VISUAL STABILITY ASSESSMENT (TABLE 11) 6. VISUAL MORPHOLOGICAL STABILITY ASSESSMENT (TABLE 12) 7. STREAM REACH MORPHOLOGY AND HYDRAULIC DATA (TABLE 13) 8. CROSS - SECTION MORPHOLOGY AND HYDRAULIC DATA (TABLE 14) 9. RIFFLE PEBBLE COUNT SIZE CLASS DISTRIBUTIONS 10. STREAM REFERENCE STATION PHOTO LOGS Table 9. Hydrological (Bankfull) Verifications Elk Branch Mitigation Project- #92665 Date of Data Date of Station No. Gauge Watermark Height (inches) Photo Number Method of Data Collection Collection Event Elk Branch Reach 2 UT1 - -- Lack of Between - -- summer during time Julyn2d011 continuous with lack of 1 +48 -2 +06 10/25/2012 Gauge measurement. 611, 2.4" " 3 2+16-2+32 - -- significant rainfall 10/25/12 Lack of Structure may not be Between continuous 1 +43 -1 +63 completely sealed on - -- 10/25/12 flow (UT2) upstream end 11/27/2013 and Gauge measurement. 1.6" 4.12" 11/27/13 Table 10. Stream Problem Areas Elk Branch Mitigation Project- #92665 MY Feature Station No. Suspected Cause Photo Number Issue 1 +07 -1 +19 Survey conducted in - -- Lack of 1 +25 -1 +42 - -- summer during time 1 continuous with lack of 1 +48 -2 +06 - -- flow (UT2) 2+16-2+32 - -- significant rainfall Lack of Structure may not be 2 continuous 1 +43 -1 +63 completely sealed on - -- flow (UT2) upstream end Feature Stream Type BKF Area BKF Width 1 BKF Depth Max BKF Depth W/D BH Ratio ER BKF Elev TOB Elev Riffle Eb 2.7 5.19 1 0.51 0.89 10.13 1 1.3 5.1 2620.49 1 2620.71 2624 2623.5 2623 $ 2622.5 2622 0 2621.5 2621 2620.5 W 2620 2619.5 Cross - Section X1 - Longitudinal Station 7 +36 (Elk Branch) t YR2 2013 Yr1 2012 t Asbuilt 2011 -- e- -- Bankfull 0 10 20 30 40 50 Station (ft) Photo 1: XS -1 facing right bank Photo 2: XS -1 facing left bank Photo 3: XS -1 facing upstream Photo 4: XS -1 facing downstream Feature Stream Type BKF Area BKF Width 1 BKF Depth Max BKF Depth W/D BH Ratio ER BKF Elev TOB Elev Pool - 4.8 5.1 1 0.93 1.48 5.46 1 1.3 6.4 2604.32 1 2604.76 Cross - Section X2 - Longitudinal Station 12 +79 (Elk Branch) 2605.5 2605 2604.5 ------ - - - - -- 2604 0 2603.5 —w— Yr2 2013 W 2603 Yr1 2012 t Asbuilt 2011 2602.5 - -- 9--- Bankfull 2602 0 5 10 15 20 25 30 35 Station (ft) Photo 5: XS -2 facing right bank Photo 6: XS -2 facing left bank Photo 7: XS -2 facing upstream Photo 8: XS -2 facing downstream Feature Stream Type BKF Area BKF Width 1 BKF Depth Max BKF Depth W/D BH Ratio ER BKF Elev TOB Elev Riffle Cb 3.4 8.21 1 0.42 0.95 19.59 1 1 4.3 2599.51 1 2599.51 2601 2600.5 2600 0 2599.5 c� d 2599 W 2598.5 2598 Cross - Section X3 - Longitudinal Station 14 +38 (Elk Branch) 0 5 10 15 20 25 Station (ft) t Yr2 2013 .i­ Yr1 2012 t Asbuilt 2011 -- e- -- Bankfull 30 35 40 Photo 9: XS -3 facing right bank Photo 10: XS -3 facing left bank Photo 11: XS -3 facing upstream Photo 12: XS -3 facing downstream Feature Stream Type BKF Area BKF Width 1 BKF Depth Max BKF Depth W/D BH Ratio ER BKF Elev TOB Elev Riffle Cb 4.9 9.44 1 0.52 0.98 18 1 1 4.8 2587.66 1 2587.66 C O r� R m W 2590 2589.5 2589 2588.5 2588 2587.5 2587 2586.5 Cross - Section X4 - Longitudinal Station 20 +36 (Elk Branch) 0 10 20 30 40 Station (ft) t Yr2 2013 Yr1 2012 —�— Asbuilt 2011 -- o - -- Bankfull 50 60 Photo 13: XS -4 facing right bank Photo 14: XS -4 facing left bank Photo 15: XS -4 facing upstream Photo 16: XS -4 facing downstream Feature Stream Type BKF Area BKF Width 1 BKF Depth Max BKF Depth W/D BH Ratio ER BKF Elev TOB Elev Pool 10.4 10.29 1.01 2.49 10.21 1 4.3 2583.4 1 2583.4 2584.5 2584 2583.5 2583 0 2582.5 > 2582 W Ei 2581.5 2581 2580.5 Cross - Section X5 - Longitudinal Station 22 +16 (Elk Branch) 0 10 20 30 40 50 Station (ft) Photo 17: XS -5 facing right bank Photo 18: XS -5 facing left bank Photo 19: XS -5 facing upstream Photo 20: XS -5 facing downstream Feature Stream Type BKF Area BKF Width 1 BKF Depth Max BKF Depth W/D BH Ratio ER BKF Elev TOB Elev Riffle Cb 2.7 7.31 1 0.37 0.79 19.72 1 1 5.1 2608.18 1 2608.18 c r m W 2610 2609.5 2609 2608.5 2608 2607.5 2607 Cross - Section X1 - Longitudinal Station 0 +54 0 10 20 30 40 Station (ft) Yr2 2013 Yr1 2012 t Asbuilt 2011 -- o - -- Bankfull 50 60 Photo 1: XS -1 facing right bank Photo 2: XS -1 facing left bank Photo 3: XS -1 facing upstream Photo 4: XS -1 facing downstream Feature Stream Type BKF Area BKF Width 1 BKF Depth Max BKF Depth W/D BH Ratio ER BKF Elev TOB Elev Riffle Eb 3.6 7.02 1 0.52 0.93 13.61 1 1 5.8 2599.9 1 2599.9 c 0 d n 2602 2601.5 2601 2600.5 2600 2599.5 2599 2598.5 Cross - Section X2 - Longitudinal Station 2 +59 t Yr2 2013 —� Yr1 2012 t Asbuilt 2011 -- e- -- Bankfull 0 10 20 30 40 50 Station (ft) Photo 5: XS -2 facing right bank Photo 6: XS -2 facing left bank Photo 7: XS -2 facing upstream Photo 8: XS -2 facing downstream Feature Stream Type BKF Area BKF Width 1 BKF Depth Max BKF Depth W/D BH Ratio ER BKF Elev TOB Elev Riffle Cb 3.7 8.25 1 0.45 1.04 18.33 1 1 4.6 2592.25 1 2592.25 2596 2595 2594 C O 2593 d w 2592 2591 Cross - Section X3 - Longitudinal Station 4 +20 t Yr2 2013 Yr1 2012 t Asbuilt 2011 -- o - -- Bankfull 0 10 20 30 40 50 Station (ft) Photo 9: XS -3 facing right bank Photo 10: XS -3 facing left bank Photo 11: XS -3 facing upstream Photo 12: XS -3 facing downstream Feature Stream Type BKF Area BKF Width 1 BKF Depth Max BKF Depth W/D BH Ratio ER BKF Elev TOB Elev Pool 11.7 9.85 1.19 228 8.28 1 4.7 2590.09 1 2590.09 2593 2592 F 2591 0 r 2590 ca > 2589 w r4� :l Cross - Section X4 - Longitudinal Station 4 +75 0 10 20 30 40 50 60 Station (ft) Photo 13: XS -4 facing right bank Photo 14: XS -4 facing left bank Photo 15: XS -4 facing upstream Photo 16: XS -4 facing downstream Feature Stream Type BKF Area BKF Width BKF Depth Max BKF Depth W/D BH Ratio ER BKF Elev TOB Elev Riffle Eb 2.9 5.23 0.55 0.84 9.5 1 7.6 2639.18 1 2639.18 Cross - Section X1 - Longitudinal Station 1 +35 NEIII&I 2640 F = 2639.5 o �— ---- - - - - -- > 2639 t 2013 Yr2 m W 2012 Yr1 2638.5 4 2011 Asbullt o - -- Bankfull 2638 0 10 20 30 40 50 Station (ft) Photo 1: XS -1 facing right bank Photo 2: XS -1 facing left bank Photo 3: XS -1 facing upstream Photo 4: XS -1 facing downstream Feature Stream Type BKF Area BKF Width 1 BKF Depth Max BKF Depth W/D BH Ratio ER BKF Elev TOB Elev Pool Eh 5.9 6.51 1 0.91 1.5 7.15 1 1 5.2 2633.9 1 2633.9 2635 2634.5 w. 2634 c 2633.5 ED 2633 2632.5 2632 Cross - Section X2 - Longitudinal Station 2 +56 0 5 10 15 20 25 Station (ft) t 2013 Yr2 —A— 2012 Yr1 t 2011 Asbuilt -- o- -- Bankfull 30 35 40 Photo 5: XS -2 facing right bank Photo 6: XS -2 facing left bank Photo 7: XS -2 facing upstream Photo 8: XS -2 facing downstream Longitudinal Profile -Elk Branch (Yr 2 Monitoring) 3 +00 -6 +00 2640 — *--TWG -Yr2 2013 t TWG -Yr1 2012 2638 —*---TWG- Asbuilt 2011 —►ice WSF 2636 --m--Top of Bank 2634 2632 c m 2630 d w 2628 MELL- 2626 - 2624 %Ai;;;; 2622 2620 300 350 400 450 500 550 600 Station (ft) Longitudinal Profile -Elk Branch (Yr 2 Monitoring) 6 +00 -9 +00 2630 — *--TWG -Yr2 2013 TWG -Yr1 2012 2628 —*---TWG- Asbuilt 2011 —s —WSF --m—Top of Bank 2626 2624 2622 C 2620 -------- - - - - ------- -- m w 2618 2616 IL 2614 2612 2610 600 650 700 750 800 850 900 Station (ft) Longitudinal Profile -Elk Branch (Yr 2 Monitoring) 9 +00 -12 +00 2620 — ik ..TWG -Yr2 2013 --a—. TWG -Yr1 2012 2618 —*---TWG- Asbuilt 2011 — o*—WSF —w—Top of Bank 2616 2614 2612 - j C 2610 - - - - - - -- m m w 2608 2606 2604 2602 2600 900 950 1000 1050 1100 1150 1200 Station (ft) Longitudinal Profile -Elk Branch (Yr 2 Monitoring) 12 +00 -15 +00 2610 — *--TWG -Yr2 2013 TWG -Yr1 2012 2608 —*---TWG- Asbuilt 2011 —s —WSF --m—Top of Bank 2606 2604 2602 C 2600 m w 2598 2596 2594 2592 2590 1200 1250 1300 1350 1400 1450 1500 Station (ft) Longitudinal Profile -Elk Branch (Yr 2 Monitoring) 15 +00 -18 +00 2600 — *—TWG -Yr2 2013 TWG- Yr12012 2598 i TWG- Asbuilt 2011 --x— WS F 2596 tTop of Bank t 2594 ----------- - - - --- -- 2592 - IAML c m 2590 m w 2588 2586 2584 2582 2580 1500 1550 1600 1650 1700 1750 1800 Station (ft) Longitudinal Profile -Elk Branch (Yr 2 Monitoring) 18+00-21+00 2600 — *--TWG -Yr2 2013 TWG -Yr1 2012 2598 —*---TWG- Asbuilt 2011 —s —WSF --m—Top of Bank 2596 2594 2592 c 2590 A m w 2588 2586 2584 2582 2580 1800 1850 1900 1950 2000 2050 2100 Station (ft) Longitudinal Profile -Elk Branch (Yr 2 Monitoring) 21+00-24+00 2590 — ik ..TWG -Yr2 2013 --a—. TWG -Yr1 2012 2588 —*---TWG- Asbuilt 2011 — o*—WSF —w—Top of Bank 2586 2584 -------- - - - - -- 2582 -- - C 0 2580 - JIM - -- - - -- - m w 2578 - - 2576 2574 2572 2570 2100 2150 2200 2250 2300 2350 2400 Station (ft) F 2615 2610 2605 2600 2595 2590 Longitudinal Profile -UT1 (Yr 2 Monitoring) 0 +00 -3 +50 0 50 100 150 200 250 300 350 Station (ft) Longitudinal Profile -UT1 (Yr 2 Monitoring) 3 +50 -7 +00 2600 tTWG -Yr2 2013 TWG -Yr1 2012 t TWG - Asbuilt 2011 --*t—WSF —Top of Bank 2595 2590 c 0 m w 2585. __ 2580 2575 350 400 450 500 550 600 650 700 Station (ft) 2646 2644 2642 2640 2638 c 0 d w 2636 2634 2632 2630 2628 Longitudinal Profile -UT2 Year 2 Monitoring 0 50 100 150 200 250 300 350 Station (ft) Table 11. Categorical Visual Morphological Stability Assessment Elk Branch Mitigation Project - Project No. 92665 Elk Branch Reach 1 (951 LF) Feature Initial MY -01 MY -02 MY -03 MY -04 MY -05 Riffles 100% 100% 100% Pools 100% 100% 100% Thalweg 100% 100% 100% Meanders - - - -- - - - -- - - - -- Bed General 100% 100% 100% Bank Condition 100% 100% 100% Rock/Log Drops 100% 100% 100% Vanes / J Hooks etc. - - - -- - - - -- - - - -- Wads and Boulders - - - -- - - - -- I - - - -- Elk Branch Reach A (592 LF) Feature Initial MY -01 MY -02 MY -03 MY -04 MY -05 Riffles 100% 100% 100% Pools 100% 100% 100% Thalweg 100% 100% 100% Meanders - - - -- - - - -- - - - -- Bed General 100% 100% 100% Bank Condition 100% 100% 100% Rock/Log Drops 100% 100% 100% Vanes / J Hooks etc. - - - -- - - - -- - - - -- Wads and Boulders - - - -- - - - -- I - - - -- Elk Branch Reach B (403 LF) Feature Initial MY -01 MY -02 MY -03 MY -04 MY -05 Riffles 100% 100% 100% Pools 100% 100% 100% Thalweg 100% 100% 100% Meanders - - - -- - - - -- - - - -- Bed General 100% 100% 100% Bank Condition 100% 100% 100% Rock/Log Drops 100% 100% 100% Vanes / J Hooks etc. 100% 100% 100% Wads and Boulders - - - -- - - - -- I - - - -- Elk Branch Reach 2 (186 LF) Feature Initial MY -01 MY -02 MY -03 MY -04 MY -05 Riffles 100% 100% 100% Pools 100% 100% 100% Thalweg 100% 100% 100% Meanders - - - -- - - - -- - - - -- Bed General 100% 100% 100% Bank Condition 100% 100% 100% Rock/Log Drops 100% 100% 100% Vanes / J Hooks etc. - - - -- - - - -- - - - -- Wads and Boulders - - - -- - - - -- - - - -- UTI (656LF) Feature Initial MY -01 MY -02 MY -03 MY -04 MY -05 Riffles 100% 100% 100% Pools 100% 100% 100% Thalweg 100% 100% 100% Meanders - - - -- - - - -- - - - -- Bed General 100% 94% 100% Bank Condition 100% 100% 100% Rock/Log Drops 100% 99% 100% Vanes / J Hooks etc. - - - -- - - - -- - - - -- Wads and Boulders - - - -- - - - -- - - - -- UT2 (242 LF) Feature Initial MY -01 MY -02 MY -03 MY -04 MY -05 Riffles 100% 100% 100% Pools 100% 100% 100% Thalweg 100% 100% 100% Meanders - - - -- - - - -- - - - -- Bed General 100% 79% 96% Bank Condition 100% 100% 100% Rock/Log Drops 100% 100% 98% Vanes / J Hooks etc. 100% 100% 100% Wads and Boulders - - - -- - - - -- - - - -- Table 12. Visual Morphological Stability Assessment Elk Branch Mitigation Project - Project No. 92665 Elk Branch Reach 1 (951 LF Feature Category Metric (per As -Built and reference baselines) Stable) Number Performing as Intended Total number per As -Built Total Number / feet in unstable state Performing in Stable Condition Feature Perfomance Mean or Total A. Riffles 1. Present? 23 23 0/0 100 2. Armor stable (e.g. no displacement)? 23 23 0/0 100 3. Facet grades appears stable? 23 23 0/0 100 4. Minimal evidence of embeddin /finin ? 23 23 0/0 100 5. Length appropriate? 23 23 0/0 100 100 B. Pools 1. Present? (e.g. not subject to severe aggradation or migration?) 30 30 0/0 100 2. Sufficiently deep Max Pool D:Mean Bkf >1.6? 30 30 0/0 100 3. Length appropriate? 30 30 0/0 100 100 C. Thalweg' 1. Upstream of pool structure centering? 1 1 0/0 100 2. Downstream of pool structure centering? 1 1 0/0 100 100%, D. Meanders 1. Outer bend in state of limited /controlled erosion? 0 0 0/0 N/A 2. Of those eroding, # w /concomitant point bar formation? 0 0 0/0 N/A 3. Apparent Re within spec? 0 0 0/0 N/A 4. Sufficient flood lain access and relief? 0 0 0/0 N/A N /A' E. Bed 1. General channel bed aggradation areas bar formation 951 951 0/0 100 General 2. Channel bed degradation - areas of increasing down. cutting or head cutting. 951 951 0/0 100 100 F. Vanes, 1. Free of back or arm scour? 30 30 0/0 100 Rock/Log 2. Height appropriate? 30 30 0/0 100 Drop 3. Angle and geometry appear appropriateli 30 30 0/0 100 Structures 4. Free of piping or other structural failures? 30 30 0/0 100 100 G. Wads/ 1. Free of scour? N/A N/A N/A N/A Boulders 2. Footing stable? N/A N/A N/A N/A N/A Elk Branch Reach A (592 LF) Feature Category Metric (per As -Built and reference baselines) Stable) Number Performing as Intended Total number per As -Built Total Number / feet in unstable state Performing in Stable Condition Feature Perfomance Mean or Total A. Riffles 1. Present? 15 15 0/0 100 2. Armor stable (e.g. no displacement)? 15 15 0/0 100 3. Facet grades appears stable? 15 15 0/0 100 4. Minimal evidence of embedding/fining! 15 15 0/0 100 5. Length appropriate? 15 15 0/0 100 100 B. Pools 1. Present? (e.g. not subject to severe aggradation or migration?) 15 15 0/0 100 2. Sufficiently deep Max Pool D:Mean Bkf >1.6? 15 15 0/0 100 3. Length appropriate? 15 15 0/0 100 100 C. Thalweg' 1. Upstream of pool structure centering? 1 1 0/0 100 2. Downstream of pool structure centering? 1 1 0/0 100 100%, D. Meanders 1. Outer bend in state of limited /controlled erosion? 0 0 0/0 N/A 2. Of those eroding, # w /concomitant point bar formation? 0 0 0/0 N/A 3. Apparent Rc within spec? 0 0 0/0 N/A 4. Sufficient flood lain access and relief? 0 0 0/0 N/A N /A' E. Bed 1. General channel bed aggradation areas bar formation' 592 592 0/0 100 General 2. Channel bed degradation - areas of increasing down- cutting or head cutting? 592 592 0/0 100 100 F. Vanes, 1. Free of back or arm scour? 9 9 0/0 100 Rock/Log 2. Height appropriate? 9 9 0/0 100 Drop 3. Angle and geometry appear appropriatee 9 9 0/0 100 4. Free of piping or other structural failures? 9 9 0/0 100 100 G. Wads/ 1. Free of scour? N/A N/A N/A N/A Boulders 2. Footing stable? N/A N/A N/A N/A N/A Elk Branch Reach B (403 LF) Feature Category Metric (per As -Built and reference baselines) Stable) Number Performing as Intended Total number per As -Built o a Number / feet in unstable state Flertorming in Stable Condition Feature Perfomance Mean or Total A. Riffles 1. Present? 14 14 0/0 100 2. Armor stable (e.g. no displacement)? 14 14 0/0 100 3. Facet grades appears stable? 14 14 0/0 100 4. Minimal evidence of embeddin /finin a 14 14 0/0 100 5. Length appropriate? 14 14 0/0 100 100 B. Pools 1. Present? (e.g. not subject to severe aggradation or migration?) 14 14 0/0 100 2. Sufficiently deep Max Pool D:Mean Bkf >1.6? 14 14 0/0 100 3. Length appropriate? 14 14 0/0 100 100 C. Thalweg' 1. Upstream of pool structure centering? 1 1 0/0 100 2. Downstream of pool structure centering? 1 1 0/0 100 100%, D. Meanders 1. Outer bend in state of limited /controlled erosion? 0 0 0/0 N/A 2. Of those eroding, # w /concomitant point bar formation? 0 0 0/0 N/A 3. Apparent Rc within spec? 0 0 0/0 N/A 4. Sufficient flood lain access and relief? 0 0 0/0 N/A N /A' E. Bed 1. General channel bed aggradation areas bar formation 403 403 0/0 100 General 2. Channel bed degradation - areas of increasing down- cutting or head cutting. 403 403 0/0 100 100 F. Vanes, 1. Free of back or arm scour? 14 14 0/0 100 Rock/Log 2. Height appropriate? 14 14 0/0 100 Drop 3. Angle and geometry appear appropriate'! 14 14 0/0 100 Structures 4. Free of piping or other structural failures? 14 14 0/0 100 100 G. Wads/ 1. Free of scour? N/A N/A N/A N/A Boulders 2. Footing stable? N/A N/A N/A N/A N/A Elk Branch Reach 2 (186 LF) Feature Category Metric (per As -Built and reference baselines) Stable) Number Performing as Intended Total number per As -Built Total Number / feet in unstable state Performing in Stable Condition Fee ure Perfomance Mean or Total A. Riffles 1. Present? 7 7 0/0 100 2. Armor stable (e.g. no displacement)? 7 7 0/0 100 3. Facet grades appears stable? 7 7 0/0 100 4. Minimal evidence of embeddin /finin e 7 7 0/0 100 5. Length appropriate? 7 7 0 100 100 B. Pools 1. Present? (e.g. not subject to severe aggradation or migration?) 7 7 0/0 100 2. Sufficiently deep Max Pool D:Mean Bkf >1.6? 7 7 0/0 100 3. Length appropriate? 7 7 0/0 100 100 C. Thalweg' 1. Upstream of pool structure centering? 1 1 0/0 100 2. Downstream of pool structure centering? 1 1 0/0 100 100%2 D. Meanders 1. Outer bend in state of limited /controlled erosion? 0 0 0/0 N/A 2. Of those eroding, # w /concomitant point bar formation? 0 0 0/0 N/A 3.Appa rent Rc within s ec? 0 0 0/0 N/A 4. Sufficient flood lain access and relief? 0 0 0/0 N/A NIA a E. Bed 1. General channel bed aggradation areas bar formation' 186 186 0/0 100 General 2. Channel bed degradation - areas of increasing down- cutting or head cutting. 186 186 0/0 100 100 F. Vanes, 1. Free of back or arm scour? 7 7 0/0 100 Rock/Log 2. Height appropriate? 7 7 0/0 1 100 Drop 3. Angle and geometry appear appropriate! 7 7 0/0 100 4. Free of piping or other structural failures? 7 7 0/0 100 100 G. Wads/ 1. Free of scour? N/A N/A N/A N/A Boulders 2. Footing stable? N/A N/A N/A N/A N/A Feature Category -"able) Metric (per As -Built and reference baselines) Number Performing as Intended I o a um er a orming eature Total number / feet in unstable in Stable Perfomance per As -Built state Condition Mean or Total A. Riffles 1. Present? 29 29 0/0 100 2. Armor stable (e.g. no displacement)? 29 29 0/0 100 3. Facet grades appears stable? 29 29 0/0 100 4. Minimal evidence of embeddin /finin a 29 29 0/0 100 5. Length appropriate? 29 1 29 0/0 100 100 B. Pools 1. Present? (e.g. not subject to severe aggradation or migration?) 30 30 0/0 100 2. Sufficiently deep Max Pool D:Mean Bkf >1.6? 30 30 0/0 100 3. Length appropriate? 30 30 0/0 100 100 C. Thalweg' 1. Upstream of pool structure centering? 1 1 0/0 100 2. Downstream of pool structure centering? 1 1 0/0 100 100%, D. Meanders 1. Outer bend in state of limited /controlled erosion? 0 0 0/0 N/A 2. Of those eroding, # w /concomitant point bar formation? 0 0 0/0 N/A 3. Apparent Rc within spec? 0 0 0/0 N/A 4. Sufficient flood lain access and relief? 0 0 0/0 N/A N/A 3 E. Bed 1. General channel bed aggradation areas bar formation' 656 656 0/0 100 Generar 2. Channel bed degradation - areas of increasing down cutting or head cutting ? 656 656 0/0 100 100 F. Vanes, 1. Free of back or arm scour? 29 29 0/0 100 Rock/Log 2. Height appropriate? 29 29 0/0 100 Drop 3. Angle and geometry appear appropriatele 29 29 0/0 100 Structures 4. Free of piping or other structural failures? 29 29 0/0 100 100 G. Wads/ 1. Free of scour? N/A N/A N/A N/A Boulders 2. Footing stable? N/A N/A N/A N/A N/A UT2 (242 LF) Feature Category Metric (per As -Built and reference baselines) a e Number Performing as Intended Total number per As -Built Total Number / feet in unstable state Performing in Stable Condition Fee ure Perfomance Mean or Total A. Riffles 1. Present? 10 10 0/0 100 2. Armor stable (e.g. no displacement)? 10 10 0/0 100 3. Facet grades appears stable? 10 10 0/0 100 4. Minimal evidence of embeddin /finin i 10 10 0/0 100 5. Length appropriate? 10 10 0/0 100 100 B. Pools 1. Present? (e.g. not subject to severe aggradation or migration?) 10 10 0/0 1 100 2. Sufficiently deep Max Pool D:Mean Bkf >1.6? 10 10 0/0 100 3. Length appropriate? 10 10 0/0 100 100 C. Thalweg' 1. Upstream of pool structure centering? 1 1 0/0 100 2. Downstream of pool structure centering? 1 1 0/0 100 100%2 D. Meanders 1. Outer bend in state of limited /controlled erosion? 0 0 0/0 N/A 2. Of those eroding, # w /concomitant point bar formation? 0 0 0/0 N/A 3. Appa rent Rc within spec? 0 0 0/0 1 N/A 4. Sufficient flood lain access and relief? 0 0 0/0 N/A N/A 3 E. Bed 1. General channel bed aggradation areas bar formation' 242 242 0/0 100 General" 2. Channel bed degradation - areas of increasing down- cutting or head cutting. 222 242 20 92 96% F. Vanes, 1. Free of back or arm scour? 11 11 0/0 100 Rock/Log 12. Height appropriate? 11 11 1 0/0 1 100 Drop 13. Angle and geometry appear appropriate i 11 11 0/0 100 4. Free of pipinq or other structural failures? 10 11 0/0 91 98 G. Wads/ 1. Free of scour? N/A N/A N/A N/A Boulders 2. Footing stable? N/A N/A N/A N/A N/A ' Thalweg feature is scored according to the centering of the thalweg over inverts of drop structures above pools and through the constructed riffle below pools since this reach is a step -pool channel without meander bends. `Of the structures and riffles that contained flow, 100% had a centered thalweg. Centering of the thalweg for all remaining structures and riffles lacking baseflow that are located within the 'dry' portion of the reach will be re- assessed in the Year 2 monitoring report. 3 Given the stream types present within the project area, stream flow energy was primarily managed vertically through drop control structures. Pattern adjustments were not designed to increase sinuosity on -site. As a result, the features addressed in Section D. 1 -3 are not as common to the project site as they are on C or E -type channels in more gently sloping terrain. Pattern adjustments were limited to maintaining channel in low point of the valley. "The channel bed is stable; the linear feet provided in Column F represents the total linear feet of subsurface flow. Table 13. Stream Reach Morphology and Hydraulic Data Elk Branch Mitigation Project #92665 Stream Reach Data Summary Elk Branch: Reach 1 Parameter Regional Curve Equation Pre- Existing Condition Reference Reach(es) Data Design (As- Built) Monitoring Year t Monitoring Year 2 Monitoring Year 3 Dimension - Riffle E . Min Mean Max Min Mean Max Min Mean Max Min Mean Max Min Mean Max Min Mean Max Min Mean Max Bankfull Width ft 6.3 -9.3 3.9 5.9 7.8 11.7 19.7 27.6 4.0 7.3 10.5 - - -- 6.1 - - -- - - -- 5.5 - - -- - - -- 5.2 - - -- Flood rone Width ft - -- 5.2 30.1 55.0 20.0 - -- 41.0 9.0 44.5 80.0 - - -- 30.9 - - -- - -- 24.3 - -- - - -- 26.4 - - -- Bankfull Mean Depth ft .44-.61 0.48 0.80 1.12 0.60 0.85 1.10 0.40 0.58 0.75 - - -- 0.67 - - -- - -- 0.46 - -- - - -- 0.51 - - -- Bankfull Max Depth ft - - - -- 0.90 1.30 1.70 0.90 1.70 2.50 0.50 0.75 1.00 - - -- 0.98 - - -- - -- 0.72 - -- - -- 0.89 - - -- Bankfull Cross Sectional Area ft2 3.6 -6.8 2.9 8.7 14.5 10.2 21.6 33.0 3.0 5.0 7.0 - - -- 4.1 - - -- I - - -- 2.6 - - - -- 2.7 - - -- Width/Depth Ratio - -- 5.0 9.5 14.0 10.7 18.9 27.0 10.0 12.0 14.0 - - -- 9.0 - - -- 12.0 -- - -- 10.1 - - -- Entrenchment Ratio -- 1.6 4.3 7.0 1.3 2.3 1 3.2 3.0 5.3 7.6 - - -- 5.1 - - -- 4.4 - -- - - -- 5.1 - - -- Bank Height Rati -- 1.4 2.3 3.1 1.0 1.0 1.0 1.0 1.1 1.1 - - -- 1 1.0 - -- - -- 1.0 -- - - -- 1.3 - -- Bankfull Velocity fps - - - -- - - - -- - - - -- - - - -- - - - -- - - - -- - - - -- 2.0 4.0 6.0 - - -- 2.6 - - -- - - -- 4.1 - - -- - - -- 3.9 Pattern Channel Beltwidth ft - - - -- 2 3 4 16 36 55 11 45 80 - - - -- - - - -- - - - -- - - - -- - - - -- - - - -- - - - -- - - - -- - - - -- Radius of Curvature ft - -- 2 4 7 28 38 47 5 15 25 -- - -- -- - -- -- - -- -- - -- - Meander Wavelength ft - - - -- 9 23 38 70 165 260 21 52 82 - - - -- - - - -- - - - -- - - - -- - - - -- - - - -- - - - -- - - - -- - - - -- Meander Width Ratio - - - -- 0.4 0.6 0.8 1.1 2.6 4.1 3.5 5.8 8.0 - - - -- - - - -- - - - -- - - - -- - - - -- - - - -- - - - -- - - - -- - - - -- Profile Riffle Length ft - - - -- - - - -- - - - -- - - - -- - - - -- - - - -- - - - -- - - - -- - - - -- - - - -- 18 34 51 21 29 37 20.4 30.8 38.0 Riffle Slope ft/ft 0.02 0.03 0.03 0.200 0.480 0.760 0.022 0.037 0.051 0.021 0.029 0.045 0.017 0.026 0.031 0.018 0.026 0.034 Pool Length ft - -- - - - -- - - - -- - - - -- 13 15 16 - - - 3 6 9 2 7 13 9 10 13 Pool Spacing (ft) - - - -- 42 - - - -- 157 42 137 231 9 30 50 17 40 55 15 39 54 17 40 53 Substrate and Transport Parameters d16 / d35 / d50 / d84 / d95 1.2/6.6/13/65/130 1- 6/14/31- 39/51- 88/110 -210 .6- 1.5/2- 7/6.2- 19/19 -65/ 26 -130 Reach Shear Stress (competency) lb/f2 - - -- - - -- I - - -- I ____ ____ ____ ____ ____ ____ _____ _____ 1.0 - - -- - - -- 0.7 - - -- - - - -- 0.7 - - -- Stream Power (transport capacity) W /m2 - - - -- - - - -- - - - -- - - - -- - - - -- - - - -- - - - -- - - - -- - - - -- - - - -- - - - -- 2.6 - - - -- - - - -- 2.8 - - - -- - 2.6 - - - -- Additional Reach Parameters Channel length ft - - - -- - -- -- -- -- -- -- 901 - - -- - -- 901 - - - -- - - - -- 901 - - - -- - - - -- 901 - - - -- Drains a Area SM 0.03 0.05 0.07 0.45 1.03 1.60 0.05 0.10 0.14 0.05 0.10 0.14 0.05 0.10 0.14 0.05 0.10 0.14 Ros en Classification - -- -- Cb /B /G /Eb4 - - - -- - -- 134 - - - -- - 134 - - - - -- 134 - - 134 - - B4 - - - -- Bankfull Discharge cfs 7 -13 - -- - -- - -- - -- - -- - -- 7 11 14 7 11 14 7 11 14 7 11 14 Sinuosity 1.02 1.06 1.10 1.10 1.15 1.19 1.02 1.07 1.11 -- 1.09 - - - - -- 1.09 1.09 BF slope (ft/ft) ---- ----- ----- - -- ----- ---- ----- ---- - --- ----- - 0.033 0.032 1 ---- I ---- 1 0.029 - -- Table 13. Stream Reach Morphology and Hydraulic Data Elk Branch Mitigation Project #92665 Stream Reach Data Summary Elk Branch: Reach A Parameter Regional Curve Equation Pre- Existing Condition Reference Reach(es) Data Design (As- Built) Monitoring Year 1 Monitoring Year 2 Monitoring Year 3 Dimension - Riffle E . Min Mean Max Min Mean Max Min Mean Max Mean Max Min Mean Max Mi n Mean Max Min Mean Max Bankfull Width (ft) 6.3 -9.3 3.9 5.9 7.8 11.7 19.7 27.6 4.0 7.3 10.5 8.1 - - -- - - -- 7.3 - - -- - - -- 8.2 - - -- Flood rone Width ft -- 5.2 30.1 55.0 20.0 - - - -- 41.0 9.0 44.5 80.0 34.6 - - -- - 32.5 - - 35.6 Bankfull Mean Depth ft .44 -.61 0.48 0.80 1.12 0.60 0.85 1.10 0.40 0.58 0.75 FMi 0.51 - - -- - 0.40 - - - -- 0.42 - - -- Bankfull Max De th ft 0.90 1.30 1.70 0.90 1.70 2.50 0.50 0.75 1.00 0.83 - - -- - 0.80 - - - -- 0.95 - - -- Bankfull Cross Sectional Area ft2 3.6 -6.8 2.9 8.7 14.5 10.2 21.6 33.0 3.0 5.0 7.0 4.2 - 2.9 - - 3.4 - - -- Width /De th Ratio - - - -- 5.0 9.5 14.0 10.7 18.9 27.0 10.0 12.0 14.0 15.8 - - -- - 18.4 - - -- 19.6 Entrenchment Ratio - - - -- 1.6 4.3 1 7.0 1.3 1 2.3 3.2 3.0 1 5.3 7.6 - - -- 4.3 - - -- - 4.4 - - -- - 4.3 Bank Height Ratio - - - -- 1.4 2.3 3.1 1.0 1.0 1.0 1.0 1 1.1 1.1 - - -- 1.0 - - -- - - -- 1.0 - - -- - - -- 1 1.0 - - -- Bankfull Velocity (fps) - - - -- - - - -- - - - -- - - - -- - - - -- - - - -- - - - -- 2.0 4.0 6.0 - - -- 2.5 - - -- - - -- 3.6 - - -- - - -- 3.1 - - -- Pattern Channel Beltwidth (ft 2 3 4 16 36 55 11 45 80 - - - -- - - - -- - - - -- - - - -- - - - -- - - - -- - - - -- - - - -- - - - -- Radius of Curvature ft - - - -- 2 4 7 28 38 47 5 15 25 - - - -- - - - -- - - - -- - - - -- - - - -- - - - -- - - - -- - - - -- - - - -- Meander Wavelength ft ) - - - -- 9 23 38 70 165 260 21 52 82 - - -_ _____ _____ _____ _____ _____ _____ ____ _____ Meander Width Ratio - - - -- 0.40 0.60 0.80 1.10 2.60 4.10 3.50 5.75 8.00 - - - -- - - - -- - - - -- - - - -- - - - -- - - - -- - - - -- - - - -- - - -- Profile Riffle Length ft - - - -- - - - -- - - - -- - - - -- - - - -- - - - -- - - - -- 34 45 64 1 31 1 44 64 35 44 64 Riffle Slope (fUft ) - - - -- 0.02 0.03 0.03 0.200 0.480 0.760 0.022 0.037 0.051 0.010 0.025 0.040 0.013 0.026 0.037 0.008 0.022 0.039 Pool Length ft -- - - -- - - - -- - - - -- 13 15 16 - - - -- 4 5 6 5 9 12 9 12 14 Pool Spacing (ft) -- 42 - - - -- 157 42 137 231 9 30 50 22 43 57 28 44 54 21 41 55 Substrate and Transport Parameters d16 / d35 / d50 / d84 / d95 1.2/6.6/13/65/130 1- 6/14/31- 39/51- 88/110 -21 .6- 1.5/2- 7/6.2- 19/19- 65/26 -130 3.2/12/17/37/69 0.2/17/27/69/117 9.4/24/30/72/152 Reach Shear Stress (competency) Ib /f2 - - - -- - - - -- - - - -- I - - - -- - - - -- - - - -- - - - -- - - - -- - - - -- - - - -- 0.7 - - - -- - - - -- 0.7 - - - -- - - - -- 0.7 - - - -- Stream Power (transport capacity) W /m2 ----- -- - -- ----- ----- ----- -- - -- -- - -- ----- ----- ----- ----- 1.7 ----- -- --- 2.5 -- --- -- - -- 2.1 -- - -- Additional Reach Parameters Channel length ft ----- -- --- ----- ----- ----- -- - -- -- - -- ----- 642 ----- - ---- 642 ----- - - - -- 642 - - --- - - --- 642 ----- Drainage Area (SM) - - - -- - - - -- .03-.07 - - - -- 0.45 1.03 1.60 0.05 0.10 0.14 0.05 0.10 0.14 0.05 0.10 0.14 0.05 0.10 0.14 Ros en Classification - - - -- - - - -- Cb /B /G /Eb4 - -- - - - -- B4 - - - -- -- B4 - - - - -- B4 B4 - B4 - - - -- Bankfull Discharge cfs 7 -13 - - - -- - - - -- - - - -- 7 11 14 7 11 14 7 11 14 7 11 14 Sinuosity -- 1.02 1.06 1.10 1.10 1.15 1.19 -- 1.09 - - -- - - -- 1.09 -- - - - -- 1.09 1.09 BF slope (ft/ft) ----- - - - -- - - --- ----- ----- - - -- - - -- 0.027 - - - -- 0.028 0.028 Table 13. Stream Reach Morphology and Hydraulic Data Elk Branch Mitigation Project #92665 Stream Reach Data Summary Elk Branch: Reach B Parameter Regional Curve Equation Pre- Existing Condition Reference Reach(es) Data Design (As- Built) Monitoring Year 1 Monitoring Year 2 Monitoring Year 3 Dimension - Riffle Eq. _ Min Mean Max Min Mean Max Min Mean Max Min Mean Max Min Mean Max Min Mean Max Min Mean Max Bankfull Width ft 6.3 -9.3 3.9 5.9 7.8 11.7 19.7 27.6 4.0 7.3 10.5 - - -- 8.7 - - -- - - -- 8.3 - - -- - - -- 9.4 - - -- Floodprone Width ft - - - -- 5.2 30.1 55.0 20.0 - - - -- 41.0 9.0 44.5 80.0 - - -- 45.0 - -- - - -- 46.5 - - -- - - -- 45.2 - - -- Bankfull Mean Depth ft .44-.61 0.48 0.80 1.12 0.60 0.85 1.10 0.40 0.58 0.75 - - -- 0.65 - - -- - - -- 0.53 - - -- - - -- 0.52 - - -- Bankfull Max Depth (ft) - - -- 0.90 1.30 1.70 0.90 1.70 2.50 0.50 0.75 1.00 - - -- 0.95 - - -- - - -- 0.75 - - -- - - -- 0.98 - - -- Bankfull Cross Sectional Area ft2 3.6 -6.8 2.9 8.7 14.5 10.2 21.6 33.0 3.0 5.0 7.0 - - -- 5.7 - - -- - - -- 4.4 - - -- - - -- 4.9 - - -- Width /Depth Ratio - -- 5.0 9.5 14.0 10.7 18.9 27.0 10.0 12.0 14.0 - - -- 13.3 - -- - - -- 1 15.6 - - -- 18.0 - - -- Entrenchment Ratio - - - -- 1.6 4.3 7.0 1.3 2.3 3.2 3.0 5.3 7.6 - - -- 5.2 - - -- - - -- 5.6 - - -- 4.8 - - -- Bank Height Ratio - - - -- 1.4 2.3 3.1 1.0 1.0 1.0 1.0 1.1 1.1 - - -- 1.0 - - -- - - -- 1.0 - - -- - - -- 1.0 - - -- Bankfull Velocity (fps -- - - -- - - - -- - - - -- - - - -- -- - - - -- 2.0 4.0 6.0 - - - -- 1.8 - - - -- - - - -- 2.4 - - - -- - - - -- 2.1 Pattern IK Channel Beltwidth ft - - - -- 2 3 4 16 36 55 11 45 80 - - - -- - - - -- - - - -- - - - -- - - - -- - - - -- - - - -- - - - -- - - - -- Radius of Curvature ft - - - -- 2 4 7 28 38 47 5 15 25 - - - -- - - - -- - - - -- - - - -- - - - -- - - - -- - - - -- - - - -- - - - -- Meander Wavelength ft - - - -- 9 23 38 70 165 260 21 52 82 - - - -- - - - -- - - - -- - - - -- - - - -- - - - -- - - - -- - - - -- - - - -- Meander Width Ratio - - - -- 0.40 0.60 0.80 1.10 2.60 4.10 3.50 5.75 8.00 - - - -- - - - -- - - - -- - - -- - - - -- - - - -- - - - -- - - - -- Profile Riffle Length (ft) - - - -- - - - -- - - - -- - - - -- - - - -- - - - -- - - - -- - - - -- - - - -- - - - -- 5 23 42 12 25 42 11 24 40 Riffle Slope ft/ft - - - -- 0.02 0.03 0.03 0.200 0.480 0.760 0.022 0.037 0.051 0.018 0.025 0.039 0.005 0.021 0.041 0.017 0.018 0.022 Pool Length (ft) - - - -- - - - -- - - - -- 13 15 16 - - - -- - - - -- - - - -- 4 8 14 8 9 11 8 11 13 Pool Spacing ft - - - -- 42 - - - -- 157 42 137 231 9 30 50 10 29 50 17 31 55 17 33 56 Substrate and Transport Parameters d16 / d35 / d50 / d84 / d95 - - - -- 1.2/6.6/13/65/130 6/14/31- 39/51 - 88/110 -2 .6- 1.5/2- 7/6.2- 19/19- 65/26 -130 - -- - -- - -- Reach Shear Stress competent lb/f2 - - - -- - - - -- - - - -- - - - -- - - - -- - - -- - - - -- - - - -- - - - -- - - - -- - - - -- 1.0 - - - -- - - - -- 0.9 - - - -- - - - -- 0.9 Stream Power (transport capacity) W /m2 - - - -- - - - -- - - - -- - - - -- - - - -- - - - -- - - - -- - - - -- - - - -- - - - -- - - - -- 1.9 - - - -- - - - -- 2.0 - - - -- - - - -- 1.8 - - - -- Additional Reach Parameters Channel length (ft) - - - -- - - - -- - - - -- - - - -- - - - -- - - - -- - - - -- - - - -- 403 - - - -- - - - -- 403 - - -- - - - -- 403 - - - -- - - - -- 403 - - - -- Drains a Area SM - - - -- - - - -- .03-.07 - - - -- 0.45 1.03 1.60 0.05 0.10 0.14 0.05 0.10 0.14 0.05 0.10 0.14 0.05 0.10 0.14 Ros en Classification - - - -- - - - -- Cb /B /G /Eb4 64 B4 B4 - - - -- - - - -- B4 - - - -- 64 - - - -- Bankfull Dischar a cfs 7 -13 - - - -- - - - -- - - - -- - - -- - - -- - - -- 7 11 14 7 11 14 7 11 14 7 11 14 Sinuosi - - - -- 1 1.02 1.06 1.10 1.10 1.15 1.19 1.09 - - -- 1.09 - - - -- - - - -- 1.09 - - - -- - - - -- 1.09 BF slope (ft/ft) - - -- - - - -- - - -- - - -- 0.021 - - - -- - - - -- 0.023 1 - - -- - - - -- 0.021 Table 13. Stream Reach Morphology and Hydraulic Data Elk Branch Mitigation Project #92665 Stream Reach Data Summary Elk Branch: Reach 2 Parameter Regional Curve Equation Pre- Existing Condition Reference Reach(es) Data Design (As- Built) Monitoring Year 1 Monitoring Year 2 Monitoring Year 3 Dimension - Riffle Eq. Min Mean Max Min Mean Max Min Mean Max Min Mean Max Min I Mean Max Min I Mean Max Min Mean Max Bankfull Width (ft) 9.30 3.9 5.9 7.8 11.7 19.7 27.6 4.0 7.3 10.5 - - -- 9.2 - - -- - - -- 9.0 - - -- - - -- 10.3 - - -- Flood rone Width ft - - - -- 5.2 30.1 55.0 20.0 - - - -- 41.0 9.0 44.5 80.0 - - -- 43.8 - - -- - - -- 44.2 - - -- - - -- 44.1 - - -- Bankfull Mean Depth (ft 0.61 0.48 0.80 1.12 0.60 0.85 1.10 0.40 0.58 0.75 - - -- 0.98 - - - -- 0.96 - - -- - - -- 1.01 - - -- Bankfull Max Depth ft - -- 0.90 1.30 1.70 0.90 1.70 2.50 0.50 0.75 1.00 - - -- 2.02 - - - -- 2.11 - - -- - - -- 2.49 - - -- Bankfull Cross Sectional Area ft2 6.80 2.9 8.7 14.5 10.2 21.6 33.0 3.0 5.0 7.0 - - -- 9.0 - - -- 8.7 - - -- - - -- 10.4 - - -- Width/Depth Ratio - - - -- 5.0 9.5 14.0 10.7 18.9 27.0 10.0 12.0 14.0 - - -- 9.3 - - - -- 9.4 - - -- - - -- 10.2 - - -- Entrenchment Rati - - - -- 1.6 1 4.3 7.0 1 1.3 2.3 3.2 3.0 5.3 1 7.6 - - -- 4.8 - - -- 4.9 - - -- - - -- 4.3 - - -- Bank Height Rati - - - -- 1.4 2.3 3.1 1.0 1.0 1.0 1.0 1.1 1.1 - - -- 1.0 - - - -- 1.0 - - -- - - -- 1.0 - - -- Bankfull Velocity fps - - - -- - ---- ----- -- --- -- --- ----- ----- 2.0 4.0 6.0 ----- 1.2 - - - -- ----- 1.2 ----- ----- 1.0 ----- Pattern Channel Beltwidth ft - - - -- 2 3 4 16 36 55 11 45 80 - - - -- - - - -- - - - -- - - - -- - - - -- - - - -- - - - -- - - - -- - - - -- Radius of Curvature ft - - - -- 2 4 7 28 38 47 5 15 25 - - - -- - - - -- - - - -- - - - -- - - - -- - - - -- - - - -- - - - -- - - - -- Meander Wavelength (ft) - - - -- 9 23 38 70 165 1 260 21 52 82 - - - -- - - - -- - - - -- - - - -- - - - -- - - - -- - - - -- - - - -- - - - -- Meander Width Ratio - - - -- 0.40 0.60 0.80 1.10 2.60 4.10 3.50 5.75 8.00 - - - -- I - - - -- - - - -- - - - -- - - - -- - - - -- - - - -- - - - -- Profile Riffle Length ft - - - -- - - - -- - - - -- - - - -- - - - -- - -- - - - -- - -- - - - -- 19 30 40 19 30 40 17 27 38 Riffle Slope fUft - - - -- 0.02 0.03 0.03 0.200 0.480 0.760 0.022 0.037 0.051 0.021 0.028 0.039 0.021 0.028 0.041 0.018 0.029 0.049 Pool Length ft - - - -- -- -- 13 15 16 - - - -- - - -- - - - -- 7 9 11 5 9 14 9 10 12 Pool Spacing (ft) - - - -- 42 - - - -- 157 42 1 137 231 9 30 50 31 39 48 33 39 45 39 43 48 Substrate and Transport Parameters d16 / d35 / d50 / d84 / d95 - - - -- 1.2/6.6/13165/130 1- 6/14/31 - 39/51- 88/110 -21 .6- 1.5/2- 7/6.2- 19/19- 65/26 -130 Reach Shear Stress competency Ib/ - - - -- - - - -- -- - - - -- - - - -- - - - -- -- -- - - - -- - - - -- 1.3 - - - -- - - -- 1.4 - - - -- - - -- 1.4 - - - -- Stream Power (transport capacity) W 1m2 - - - -- - - -- -- -- - -- - - - -- - -- 1.6 - -- - - - -- 1.7 - - - -- -- - -- 1.4 Additional Reach Parameters Channel length ft - - - -- - - - -- -- - - - -- - - - -- - -- - - - -- 279 - - - -- - - -- 279 - - - -- -- 279 - - - -- ----- 279 Drainage Area (SM) - - - -- 0.07 -- 0.14 0.45 1.03 1.60 0.07 0.11 0.14 0.05 0.10 0.14 0.05 0.10 0.14 0.05 0.10 0.14 Ros en Classification - - - -- Cb /B /G /Eb4 - - - -- - - - -- B4 -- - - - -- B4 - - - -- - - - -- B4 - - - -- - - - -- B4 - - - -- - - - -- B4 - - - -- Bankfull Discharge cfs 13 -23 --- -- - - -- -- -- -- - - -- - - -- 7 11 14 7 11 14 7 11 14 7 11 14 Sinuosi 1.02 1.06 1.10 1.10 1.15 1.19 - - - -- 1.09 -- 1.09 - - - -- -- 1.09 - - - -- - - -- 1.09 BF slope (ft/ft) - - - -- - - - - - - 0.024 - - - -- - 0.023 - -- -- - - --- 0.023 Note: Dimension information based on pool cross - section Table 13. Stream Reach Morphology and Hydraulic Data Elk Branch Mitigation Project #92665 Stream Reach Data Summary UT1 to Elk Branch Parameter Regional Curve Equation Pre- Existing Condition Reference Reach(es) Data Design As -Built Monitoring Year 1 Monitoring Year 2 Monitoring Year 3 Dimension - Riffle Eq. Min Mean Max Min Mean Max Min Mean Max Min Mean Max Min Mean Max Min Mean Max Min Mean Mean Bankfull Width ft 6.90 3.5 7.7 11.9 11.7 19.7 27.6 3.0 6.9 8.4 6.5 6.9 7.3 6.5 7.2 7.8 7.0 7.7 8.3 Floodprone Width ft ) - - - -- 6.8 29.4 52.0 20.0 30.5 41.0 9.0 17.0 25.0 34.8 36.3 37.9 33.0 35.0 36.9 36.9 38.9 40.9 Bankfull Mean Depth ft 0.47 0.34 0.53 0.72 0.60 0.85 1.10 0.30 0.45 0.60 0.46 0.53 0.59 0.34 0.38 0.42 0.37 0.4 0.52 Bankfull Max Depth ft - - - -- 0.90 1.30 1.70 0.90 1.70 2.50 0.40 0.70 1.00 0.68 0.74 0.80 0.58 0.59 0.59 0.79 0.9 1.04 Bankfull Cross Sectional Area (fl:2 4.10 5.5 7.7 9.9 10.2 21.6 33.0 3.0 4.5 6.0 3.1 3.5 3.8 2.5 2.7 2.9 2.7 3.2 3.7 Width /Depth Ratio - - - -- 2.1 5.1 8.1 10.7 18.9 27.0 10.0 12.0 14.0 11.0 12.8 14.5 16.7 20.0 23.2 13.6 16.7 19.7 Entrenchment Rati - - - -- 1.9 4.8 7.7 1.3 2.3 1 3.2 - - - -- 3.0 - - - -- 4.8 1 5.3 5.8 4.2 5.0 5.7 4.6 1 5.2 5.8 Bank Height Ratio - - - -- 1.0 1.5 1.9 1.0 1.0 1.0 1.0 1.1 1.1 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 Bankfull Velocity (fps - - - -- - - - -- - - - -- - - - -- - - - -- - - - -- - - - -- 2.0 4.0 6.0 2.6 2.9 3.2 3.4 3.8 4.1 2.7 3.2 3.7 Pattern Channel Beltwidth ft - ---- -- - -- - ---- - - --- 16 36 55 - ---- - - - -- - - - -- - ---- - ---- - ---- -- - -- - - -- - -- - - - -- - ---- Radius of Curvature (ft) ---- -- - -- ----- ----- 28 38 47 ----- - - - -- - - --- ----- ----- ----- - - --- - -- -- - - - --- - - --- ----- Meander Wavelength ft - ---- -- - -- - ---- - --- 70 165 260 - ---- --- -- -- - -- ----- - - -- - -- - ---- Meander Width Ratio - ---- -- - -- - ---- ----- 1.10 2.60 4.10 - ---- - - - -- ----- - - - - -- - ---- - - - --- - - - -- ----- - Profile Riffle Length (ft) - - - -- - - - -- - - -_ ____ _____ _____ _____ __ _____ 11 17 24 11 15 22 11 15 19 Riffle Slope ft/ft 0.022 0.030 0.038 0.200 0.138 0.076 0.023 0.042 0.061 0.018 0.066 0.104 0.037 0.061 0.080 0.022 0.042 0.063 Pool Length ft - - - -- - - - -- - - - -- - - - -- 13 15 16 - - - -- 2 4 6 2 5 8 7 9 11 Pool Spacing ft - - - -- - - - -- -- -- 42 137 231 9 13 17 20 23 26 18 21 24 19 23 24 Substrate and Transport Parameters d16 / d35 / d50 / d84 / d95 - - - -- - - -- - 6/14/31- 39/51- 88/110 -21 - - -- - -- - -- - -- Reach Shear Stress (competency) lb/f2 - - - -- - -- - - - -- -- - -- -- - -- -- -- 0.53 - - -- - - - -- 0.53 - -- - - - -- 0.53 - - -- tream Power (transport capacity) W /m2 - - - -- - - - -- - - - -- - - - -- - - - -- - - - -- - - - -- - - - -- - - - -- - - - -- - - - -- 1.54 - - - -- - - - -- 1.98 - - - -- - - - -- 1.69 - - - -- Additional Reach Parameters Channel length (ft) - - - -- - - - -- 685 - - - -- - - - -- - - - -- - - - -- - - - -- 654 - - - -- - - - -- 656 - - - -- - - - -- 656 - - - -- - - - -- 656 - - - -- Drains a Area SM -- - - - -- 0.06 - - - -- - - - -- 0.06 - - - -- - - -- 0.06 - - - -- -- 0.06 - - -- - - - -- 0.06 - - - -- - - - -- 0.06 -- Ros en Classification - ---- - - - -- B4 /G - - --- - - - -- B4 - - - -- - - --- B4 - - - -- - B4 - -- -- - - - -- B4 - - - - -- B4 - Bankfull Discharge cfs 10 -12 - - - -- - - - -- - - - -- - - -- - - -- - - -- 3 7 10 -- 10 - - - -- -- 10 -- - - - -- 10 - - - -- Sinuosit -- 1.02 1.06 1.10 1.10 1.15 1.19 - -- 1.04 -- -- 1.04 - - -- -- 1.04 -- 1.04 BF slope (ft/ft) - -- - - -- --- - -- - -- - -- - -- - -- - - -- -- - 0.046 - 0.046 - 0.048 Table 13. Stream Reach Morphology and Hydraulic Data Elk Branch Mitigation Project #92665 Stream Reach Data Summary UT2 to Elk Branch Parameter Regional Curve Equation Pre - Existing Condition Reference Reach(es) Data Design As -Built Monitoring Year 1 Monitoring Year 2 Monitoring Year 3 Dimension - Riffle AM Eq. Min Mean Max Min Mean Max Min Mean Max Min Mean Max Min Mean Max Min Mean Max Min Mean Max Bankfull Width ft 3.70 3.5 7.7 11.9 11.7 19.7 27.6 3.0 5.7 8.4 - - -- 5.4 - - -- - - -- 5.8 - - -- - - -- 5.2 - - -- Flood rone Width ft - - - -- 6.8 29.4 52.0 20.0 30.5 41.0 9.0 17.0 25.0 - - -- 38.9 - - -- - - -- 36.9 - - -- - - -- 39.5 - - -- Bankfull Mean Depth ft 0.28 0.34 0.53 0.72 0.60 0.85 1.10 0.30 0.45 0.60 - - -- 0.52 - - -- - - -- 0.44 - - -- - - -- 0.55 - - -- Bankfull Max Depth ft - - - -- 0.90 1.30 1.70 0.90 1.70 2.50 0.40 0.70 1.00 - - -- 0.86 - - -- - -- 0.76 - - -- - - -- 0.84 - - -- Bankfull Cross Sectional Area (ft2 1.50 5.5 7.7 9.9 10.2 21.6 33.0 3.0 4.5 6.0 - - -- 2.8 - - -- - - -- 2.6 - - -- - - -- 2.9 - - -- Width/Depth Ratio - - - -- 2.1 5.1 8.1 10.7 18.9 27.0 10.0 12.0 14.0 - - -- 10.3 - - -- - -- 13.3 - - -- - - -- 9.5 Entrenchment Ratio - - - -- 1.9 4.8 7.7 1.3 2.3 3.2 - - - -- 3.0 - - - -- - - -- 7.2 - - -- - - -- 6.3 - - -- - - -- 7.6 Bank Height Ratio - - - -- 1.0 1.5 1.9 1.0 1.0 1.0 1.0 1.1 1.1 - - -- 1.0 - - -- - -- 1.0 - - -- - - -- 1.0 - - -- Bankfull Velocity fps - - - -- - - - -- - - - -- - - - -- - - - -- - - - -- - - - -- 2.0 4.0 6.0 - - -- 2.1 - - -- - - -- 2.3 - - -- - - -- 2.1 - - -- Pattern I AL _ Channel Beltwidth ft - - - -- - - - -- - - - -- - - - -- 16 36 55 - - - -- - - -- - - - -- - - - -- - - - -- - - -- - - - -- - - -- - - - -- - - - -- - - - -- - ---- Radius of Curvature ft - - - -- - - - -- - - - -- - - - -- 28 38 47 - - - -- - - - -- - - - -- - - - -- - - - -- - - - -- - - - -- - - - -- - - - -- - - - -- - - - -- - - - -- Meander Wavelength ft - - - -- - - - -- - - -- - - - -- 70 165 260 - - - -- - - - -- - - - -- - - - -- - - - -- - - - -- - - - -- - - - -- - - - -- - - - -- - - - -- - - - -- Meander Width Ratio - - - -- - - - -- - - - -- - - - -- 1.1 2.6 4.1 - - - -- - - - -- - - - -- - - - -- - - - -- - - - -- - - - -- - - - -- - - - -- - - - -- - - - -- - ---- Profile 1 Riffle Length ft - - - -- - - - -- - - - -- - - - -- - - - -- - - - -- - - - -- - - - -- - - - -- - - - -- 9 12 14 9 13 15 10 13 15 Riffle Slope ft/ft - - - -- - - - -- - - - -- - - - -- 0.190 0.475 0.760 0.023 0.042 0.061 0.026 0.050 0.080 0.038 0.048 0.056 0.042 0.054 0.065 Pool Length ft - - - -- - - - -- - - - -- - - - -- 13 15 16 - - - -- - - - -- - - - -- 3 7 11 4 7 9 8 10 12 Pool Spacing (ft) - - -- - - - -- - - - -- - - - -- 42 137 231 9 26 42 15 22 27 18 21 24 19 21 23 Substrate and Transport Parameters d16 / d35 / d50 / d84 / d95 - - - -- - - -- 1- 6/14/31- 39/51- 88/110 - -- - -- - -- - -- Reach Shear Stress (competency) lb/f2 - - - -- - - - -- - - - -- - - - -- - - - -- - - - -- - - - -- - - - -- - - - -- - - - -- - - - -- 1.1 - - - -- - - - -- 0.9 - - - -- - - - -- 0.9 - - - -- Stream Power (transport capacity) W /m2 - - - -- - - - -- - - - -- - - - -- - - - -- - - - -- - - - -- - - - -- - - - -- - - - -- - - - -- 2.3 - - - -- - - - -- 2.1 - - - -- - - - -- 1.9 - - - -- Additional Reach Parameters Channel length ft - - - -- - - - -- 185 - - - -- - - - -- - - - -- - - - -- - - - -- 244 - - - -- - - - -- 241 - - - -- - - - -- 241 - - - -- - - - -- 241 - - - -- Drains a Area (SM) - - - -- - - - -- 0.01 - - - -- 0.45 1.025 1.60 - - - -- 0.01 - - - -- - - - -- 0.01 - - - -- - - - -- 0.01 - - - -- - - - -- 0.01 ----- Ros en Classification - - - -- - - - -- 134 /G - - - -- - - - -- 134 - - - -- - - - -- 134 - - - -- - - - -- B4 - - - -- - -- - 134 - - - -- - - - -- 134 - - - -- Bankfull Discharge cfs 2 -3 - - - -- - - - -- - - - -- - - -- - - - -- - - -- - - - -- 6 ----- - - - -- 6 - - - -- - - - -- 6 - - - -- - - - -- 6 - - - -- Sinuosit - - - -- 1.02 1.06 1.10 1.10 1.15 1.19 1.04 1.04 - - - -- - - - -- 1.04 - - -- 1.04 BF slope (ft/ft) ----- - -- 0.039 - -- -- 0.039 0.040 Table 14. Cross - Section Morphology and Hydraulic Data Elk Branch Mitigation Project #92665 Elk Branch - Reach 1 Elk Branch - Reach A Parameter Cross Section 1 Riffle Cross Section 2 Pool Cross Section 3 Riffle AB MY1 MY2 MY3 MY4 MY5 AB MY1 MY2 MY3 MY4 MY5 AB MY1 MY2 MY3 MY4 MY5 Dimension BF Width Lftj 6.1 5.5 5.2 6.0 5.7 5.1 8.1 7.3 8.2 Flood prone Width Lft) 30.9 24.3 26.4 32.5 32.5 32.5 34.6 32.5 35.6 BF Cross Sectional Area ft2 4.1 2.6 2.7 7.3 6.3 4.8 4.2 2.9 3.4 BF Mean Depth Lft) 0.67 0.46 0.51 1.22 1.1 0.93 0.51 0.4 0.42 BF Max Depth Lftj 0.98 0.72 0.89 2.16 1.79 1.48 0.83 0.8 0.95 Width/Depth Ratio 9.0 12.0 10.1 4.9 5.1 5.5 15.8 18.4 19.6 Entrenchment Ratio 5.1 4.4 5.1 5.4 5.7 6.4 4.3 4.4 4.3 Wetted Perimeter ft 7.4 6.5 6.2 8.5 7.9 7.0 9.1 8.1 9.1 Hydraulic Radius ft 0.6 0.4 0.4 0.9 0.8 0.7 0.5 0.4 0.4 Substrate d50 mm d84 (mm) Elk Branch - Reach B Parameter Cross Section 4 Riffle AB MY1 MY2 MY3 MY4 MY5 Dimension BF Width Lft2 8.7 8.3 9.44 Flood prone Width ft 45.0 46.5 45.20 BF Cross Sectional Area ft2 5.7 4.4 4.90 BF Mean De th ft 0.65 0.53 0.52 BF Max Depth Lft) 0.95 0.75 0.98 Width/Depth Ratio 13.3 15.6 18.0 Entrenchment Ratio 5.2 5.6 4.8 Wetted Perimeter ft 10.0 9.3 10.5 Hydraulic Radius (ft) 0.6 0.5 0.5 Parameter AB 2011 MY -1 2012 MY -2 (20 3) MY -3 2014 MY -4 2015) MY -5 2016) Min Max Med Min Max Mad Min Max Med Min Max Med Min Max Med Min Max Med Pattern Channel Beltwidth ft Radius of Curvature ft Meander Wavelength Lftj Meander Width Ratio Profile Riffle length ft 5 64 36 12 1 64 29 md 11 64 34 Riffle Slope ft/ft 0.010 0.045 1 0.025 0.005 0.041 0.027 0.008 0.039 0.021 Pool Length ft 3 14 7 2 13 9 8.1 13.8 11.8 Pool S acin ft 10 57 44 15 55 45 16.6 56.2 437 Substrate d50 mm 17 27 30 d84 mm 38 69 72 Additional Reach Parameters Valley Length ft 2121 2121 2121 Channel Length ft 1946 1946 1946 Sinuosity 1.09 1.09 1.09 Water Surface Slope ft/ft 0.027 0.027 0.029 BF Slope ft/ft 0.0211 0.033 1 0.027 0,023T-0.032 1 0.028 0.021 0.029 0.025 Rosgen Classificationj B4 B4 B4 Table 14. Cross - Section Morphology and Hydraulic Data Elk Branch Mitigation Project #D06125 -B Elk Branch - Reach 2 Parameter Cross Section 5 Pool AB MY1 MY2 MY3 MY4 MY5 Dimension BF Width Lft) 9.2 9.0 10.29 Flood prone Width Lft) 43.8 44.2 44.1 BF Cross Sectional Area ft2 9.0 8.7 10.40 BF Mean De th ft 0.98 0.96 1.01 BF Max De th ft 2.02 2.11 2.49 Width/Depth Ratio 9.3 9.4 10.2 Entrenchment Ratio 4.8 4.9 4.3 Wetted PerimeterLftj 11.1 11.0 12.3 Hydraulic Radius ft 0.8 0.8 0.8 Substrate d50 mm d84 (mm) Parameter AB 2011 MY -1 2012 MY -2 2013 Min Max Med 17 38 27 0.018 0.049 0.024 9 12 11 39 48 42 304 279 1.09 0.028 0.023 B4 /Eb4 MY -3 2014 MY -4 2015 MY -5 2016 Min Max Med Min Max Med Min Max Med Min Max Med Min Max Med Pattern Channel Beltwidth ft Radius of Curvature ft Meander Wavelength Lftj Meander Width Ratio Profile Riffle length A 19 40 31 19 40 30 Riffle Slope ft/ft 0.021 0.039 1 0.026 0.021 0.041 0.025 Pool Length ft 7 11 9 5 14 10 Pool Spacing ft 31 48 40 33 45 40 Substrate d50 mm d84 mm Additional Reach Parameters Valley Length ft 304 304 Channel Len th ft 279 279 Sinuosity 1.09 1.09 Water Surface Slope ft/ft 0.027 0.027 BF Slope ft/ft 0.0171 0.024 1 0.021 0.023 Rosgen Classification B4 /Eb4 B4 /Eb4 Table 14. Cross - Section Morphology and Hydraulic Data Elk Branch Mitigation Project #D06125 -B UT1 Parameter Cross Section 1 Riffle Cross Section 2 Riffle Cross Section 3 Riffle Cross Section 4 Pool AB MY1 MY2 MY3 MY4 MY5 AB MY1 MY2 MY3 MY4 MY5 AB MY1 MY2 MY3 MY4 MY5 AB MY1 MY2 MY3 MY4 MY5 Dimension BF Width Lft2 6.7 6.5 7.3 6.5 6.96 7.0 7.3 7.79 8.3 9.4 10.3 9.9 Flood prone Width Lft) 35.7 36.89 36.9 37.6 34.75 40.9 34.8 33.03 37.8 45.2 45.88 45.9 BF Cross Sectional Area ft2 3.1 2.45 2.7 3.8 2.91 3.6 3.6 2.61 3.7 11.9 12.36 11.7 BF Mean De th ft 0.46 0.38 0.37 0.59 0.42 0.52 0.5 0.34 0.45 1.3 1.2 1.2 BF Max Depth Lftj 0.68 0.58 0.79 0.8 0.59 0.93 0.71 0.91 1.04 2.2 2.2 2.3 Width/Depth Ratio 14.7 17.3 19.7 11.0 116.67 13.6 1 1 14.5 23.2 18.3 7.5 8.58 8.3 Entrenchment Ratio 5.3 5.7 5.1 5.8 5.0 5.8 4.8 4.2 4.6 4.8 4.45 4.7 Wetted Perimeter ft 7.7 7.3 8.0 7.7 7.8 8.1 8.3 8.5 9.2 11.9 12.7 12.2 Hydraulic Radius ft 0.41 0.34 0.34 0.50 0.37 0.45 0.44 0.31 0.40 1.00 0.97 0.96 Substrate d50 mm d84 (mm) Parameter AB 2011 MY -1 2012 MY -2 2013 MY -3 2014 MY -4 2015 MY -5 2016 Min Max Med Min Max Med Min Max Med Min Max Med Min Max Med Min Max Med Pattern Channel Beltwidth ft Radius of Curvature ft Meander Wavelength ft Meander Width Ratio Profile Riffle length ft 11 24 15 11 1 22 14 11 19 16 Riffle Slope ft/ft 0.018 0.104 0.080 0.037 0.080 0.063 0.022 0.064 0.044 Pool Length ft 2 6 4 2 8 5 7 19 11 24 10 23 Pool Spacing ft 31 26 23 18 24 22 Substrate d50 mm - - -- d84 mm - - -- - - -- Additional Reach Parameters Valley Len th ft 662 662 662 Channel Len th ft 683 683 683 Sinuosity 1.04 1.04 1.04 Water Surface Slope ft/ft 0.049 0.046 0.046 BF Slo a ft/ft 0.046 0.046 0.048 Rosgen Classification B B B Table 14. Cross- Section Morphology and Hydraulic Data Elk Branch Mitigation Project #D06125 -B UT2 Parameter Cross Section 1 Riffle Cross Section Pool 2 AB MY1 MY2 MY3 MY4 MY5 AB MY1 MY2 MY3 MY4 MY5 Dimension BF Width Lftj 5.4 5.8 5.2 7.9 7.4 6.5 Flood prone Width Lft) 38.9 36.9 39.5 34.0 34.0 34.1 BF Cross Sectional Area ft2 2.8 2.6 2.9 6.6 5.9 5.9 BF Mean Depth Lft) 0.52 0.44 0.55 0.83 0.80 0.91 BF Max De th ft 0.86 0.76 0.84 1.49 1.40 1.50 Width/Depth Ratio 10.3 13.3 9.5 1 9.5 9.3 7.2 Entrenchment Ratio 7.2 6.3 7.6 4.3 4.6 5.2 Wetted Perimeter ±1 6.4 6.7 6.3 9.6 9.0 8.3 Hydraulic Radius ft 0.4 0.4 0.5 0.7 0.7 0.7 Substrate d50 mm d84 (mm) Parameter AB 2011 MY -1 2012 MY -2 2013 MY -3 2014) MY -4 2015) MY -5 2016 Min Max Med Min Max Med Min Max Med Min Max Med Min Max Med Min Max Med Pattern Channel Beltwidth ft Radius of Curvature Lft) Meander Wavelength ±1 Meander Width Ratio Profile Riffle length ft 9 14 13 9 15 13 10.00 14.90 14.20 Riffle Slope ft/ft 0.026 0.080 0.047 0.038 0.056 0.050 0.042 0.065 0.054 Pool Length ft 3 11 5 4 9 7 8 12 9 Pool Spacing ft 15 27 23 18 24 22 19 23 20 L Substrate - d50 mm - - -- - - - d84 mm - - -- - - -- ---- ---- ---- ---- Additional Reach Parameters Valley Length ft 320 320 320 Channel Length ft 241 241 241 Sinuosity - -- 1.04 - - -- - 1.04 -- 1.04 Water Surface Sloe ft/ft - -- 0.038 - - -- 0.038 0.039 - -- BF Slope' ft/ft 0.039 0.049 0.044 0.039 0.040 Rosgen Classification B4 B4 B4 Notes: Figure BI. Elk Branch Pebble Count Elk Branch Mitigation Project, EEP# 92665 SITE OR PROJECT: Elk Branch REACH /LOCATION: Mainstem, Riffle below PPT16 FEATURE: Riffle Summary Data 2013 MATERIAL PARTICLE SIZE mm Total Class % % Cum Silt/ Clay Silt / Clay < .063 8 14% 14% Sand Very Fine .063-.125 NAB (2011) 90% 14% Fine .125-.25 4% 18% Medium .25-.50 2% 20% Coarse .50-1.0 2 20% Very Coarse 1.0-2.0 v 20% Gravel Very Fine 2.0-2.8 a 50% 20% Very Fine 2.8-4.0 20% Fine 4.0-5.6 2 40% 20% Fine 5.6-8.0 3 2% 22% Medium 8.0 - 11.0 1 2 4% 26% Medium 11.0 - 16.0 10 8% 34% Coarse 16-22.6 5 6% 40% Coarse 22.6-32 21 18% 58% Very Coarse 32-45 18 16% 74% Very Coarse 45-64 9 8% 82% Cobble Small 64-90 12 10% 92% Small 90- 128 2 4% 96% Large 128-180 2 2% 98% Large 180-256 4 2% 100% Boulder Small 256-362 Particle Size Class (mm) Small 362-512 Medium 512-1024 Large -Very Large 1024-2048 Bedrock Bedrock > 2048 Total% of Whole Count 100 100 100 Summary Data Channel Materials D50 = 30.45 D84 = 71.70 D95 = 151.79 Elk Branch Pebble Count Particle Size Distribution 100% Elk Branch Riffle Pebble Count Size Class Distribution 100% NAB (2011) 90% 80% ■ YR1 (2012) m YR2 (2013) 70% —AB (2011) 90% v 60% a 50% 40% U 30% 20% 80% +YR 1 (2012) }YR 2 (2013) 10% di d 0% Particle Size Class (mm) 70% 60% 50% U Sr 40% A, 30% c� 20% U 10% 0% 7 7 0.01 0.1 1 10 100 1000 Particle Size (mm) Elk Branch Riffle Pebble Count Size Class Distribution 100% NAB (2011) 90% 80% ■ YR1 (2012) m YR2 (2013) 70% v 60% a 50% 40% U 30% 20% 10% di d 0% Particle Size Class (mm) Elk Branch Photo Log - Reference Photo Points Notes: Photos for Elk Branch were taken November 2013. 1. Photo point locations are shown on the plan views in the actual location the picture was taken. 2. All points are marked with a wooden stake and flagging tape. For channel points, the stake is set up on an adjacent bank. Photo Point 1: looking upstream Photo Point 1: looking downstream Photo Point 2: looking upstream Photo Point 2: looking downstream Photo Point 3: looking upstream Photo Point 3: looking downstream Photo Point 4: looking downstream Photo Point 5: looking downstream Photo Point 5: looking upstream Photo Point 6: looking upstream Photo Point 6: looking downstream Photo Point 7: looking upstream Photo Point 7: looking downstream Photo Point 8: looking upstream Photo Point 8: looking downstream Photo Point 9: looking upstream Photo Point 10: looking upstream Photo Point 11: looking downstream Photo Point 10: looking downstream Photo Point 12: looking upstream n Photo Point 13: looking upstream Photo Point 13: looking downstream Photo Point 14: looking upstream Photo Point 14: looking downstream Photo Point 15: looking upstream Photo Point 15: looking downstream Photo Point 16: looking upstream Photo Point 16: looking downstream Photo Point 17: looking upstream Photo Point 17: looking downstream Photo Point 18: looking upstream Photo Point 19: looking upstream Photo Point 18: looking downstream Photo Point 19: looking downstream Photo Point 20: looking upstream Photo Point 20: looking downstream UT1 to Elk Branch Photo Log - Reference Photo Points Notes: Photos for UT to Elk Branch were taken November 2013 1. Photo point locations are shown on the plan views in the actual location the picture was taken. 2. All points are marked with a wooden stake and flagging tape. For channel points, the stake is set up on an adjacent bank. Photo Point 1: looking upstream Photo Point 1: looking downstream Photo Point 2: looking upstream Photo Point 2: looking downstream Photo Point 3: looking upstream Photo Point 3: looking downstream Photo Point 4: looking upstream Photo Point 5: looking upstream Photo Point 4: looking downstream UT2 to Elk Branch Photo Log - Reference Photo Points Notes: Photos for UT2 to Elk Branch were taken November 2013. 1. Photo point locations are shown on the plan views in the actual location the picture was taken. 2. All points are marked with a wooden stake and flagging tape. For channel points, the stake is set up on an adjacent bank. Photo Point 1: looking upstream Photo Point 1: looking downstream Photo Point 2: looking upstream Photo Point 2: looking downstream Photo Point 3: looking upstream Photo Point 3: looking downstream Photo Point 4: looking upstream Photo Point 5: looking upstream Photo Point 4: looking downstream