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Home My WebLink About20061152 Ver 1_Restoration Plan_20060714 i Restoration Plan for Stream Mitigation of Silver Creek and Tributary (Conway and Queen Site) Silver Creek and Unnamed Tributary Burke County, NC !~ SCO # D05016-1 e e Prepared for: NCDENR - EEP 2728 Capital Blvd, Suite 1 H 103 Raleigh NC 27604 ~~ ' l~;cosyste~u ~~.g 4~ "'d$S ~ ~ ~ ti ~ ~~ ~ L. J~~`jt>>. ~" s'~S' Submitted: May 23, 2006 r Prepared by: Wetlands Resource Center 3970 Bowen Road C l ana Winchester, Ohio 43110 Project Manager: Cal Miller P: (614) 864-7511 F: (614) 866-3691 And EMH&T, Inc. 5500 New Albany Road Columbus, Ohio 43054 Project Manager: Miles Hebert P: (614) 775-4205 F: (614) 775-4802 Main: (614) 775-4500 f iili~ii Evans, Mechwart, Hambleton & Tilton, Inc. Engineers, Surveyors. Planners, Scientists [~ r 1 1 1 ECOSYSTEM ENHANCEMENT PROGRAM Restoration Plan -Silver Creek and Unnamed Tributary EEP Contract # D05016-1 TABLE OF CONTENTS L t L r 1 e r 1 Executive Summary .............................................................................................................................i 1.0 Project Site Identification and Location ................................................................................. l 1.1 Directions to Project Site 1.2 USGS Hydrologic Unit Code and NCDWQ River Basin Designations 1.3 Project Vicinity Map 2.0 Watershed Characterization .......................................................................................... 2.1 Drainage Area 2.2 Surface Water Classification/ Water Quality 2.3 Physiography, Geology, and Soils 2.4 Historical Land Use and Development Trends 2.5 Endangered/ Threatened Species 2.6 Cultural Resources 2.7 Potential Constraints 3.0 Project Site Streams ........................................................................................................... 3.1 Channel Classification 3.2 Discharge 3.3 Channel Morphology 3.4 Channel Stability Assessment 3.5 Bankfull Verification 3.6 Vegetation 4.0 Reference Streams ......................................................... 4.1 Watershed Characterization 4.2 Channel Classification 4.3 Discharge 4.4 Channel Morphology 4.5 Channel Stability Assessment 4.6 Bankfull Verification 4.7 Vegetation 5.0 Project Site Restoration Plan ................................................... 5.1 Restoration Project Goals and Objectives 5.2 Sediment Transport Analysis 5.3 HEC-RAS Analysis 5.4 Stormwater Best Management Practices 5.5 Natural Plant Community Restoration ..... 2 .. 8 .................................................13 ......................................... 15 6.0 Performance Criteria ............................................................................................................. 24 6.1 Streams 6.2 Stormwater Management Devices 6.3 Vegetation 6.4 Schedule/ Reporting Evans, Mechwart, Hambleton & Tilton, Inc. Engineers, Surveyors, Planners, Scientists 7 ECOSYSTEM ENHANCEMENT PROGRAM ,~ Restoration Plan -Silver Creek and Unnamed Tributary EEP Contract # D05016-1 7.0 References ................................................................................................................................ 27 8.0 Figures Figure 1. Site Vicinity Map Figure 2. Site Watershed Map Figure 3. Site NRCS Soil Survey Map Figure 4. Reference Reach Pattern Summary Map 9.0 Appendices Appendix 1. Restoration Plan Design Sheets Appendix 2. Project Site NCDWQ Stream Classification Forms Appendix 3. Project Site Design Calculations, Plots, Photographs and Summary Reports Appendix 4. Unnamed Tributary to Sliver Creek Photographs Appendix 5. Reference Reach Classification, Photos and Data Summary Reports Appendix 6. HEC-RAS Analysis Report Tables Table 1. Drainage Areas ....................................................................................................................... 2 Table 2. Silver Creek Watershed Land Use Summary ......................................................................... 4 Table 3. Federal Threatened and Endangered Species in Burke County ............................................. 6 Table 4. Morphological Data for Silver Creek ...................................................................................10 Table 5. Project Restoration Structure and Objectives .......................................................................16 Table 6. Peak Discharge Rates ...........................................................................................................18 i i Evans, Mechwart, Hambleton & Tilton, Inc. Engineers, Surveyors, Planners, Scientists ECOSYSTEMENHANCEMENT PROGRAM Restoration Plan -Silver Creek and Unnamed Tributary EEP Contract # D05016-1 EXECUTIVE SUMMARY For this project, the restoration goal is to restore the physical and biological integrity beyond current stream conditions. Current conditions consist of modified or impaired stream channels. Restoration of the streams will provide the desired habitat and stability features necessary to improve the quality these stream channels are listed below Objectives to meet that oal of restorin of the stream g . . g 1. Provide a stable stream channel with features indicative of a biologically diverse environment. 2. Restore the connection between the bankfull width and floodprone width of the channels by restoring the floodplain area. 3. Stabilize eroding banks 4. Provide a functional, native riparian floodplain corridor where deficient, and preserve any existing forested corridor. 5. Improve the physical aquatic habitat features. 6. Minimize land development impacts to the stream. 7. Provide long-term protection of the stream corridor. The restoration techniques proposed for the Unnamed Tributary stream will provide the attributes described above by incorporating a variety of features recognized to support the stability and biological diversity that are essential to ecosystem enhancement. Presently, these features are non- existent or diminished within Silver Creek and the associated Unnamed Tributary. The restoration of the Silver Creek main stem includes assessing and predicting the morphological features that will become the foundation for the construction of a stable natural channel. Considerations that have been applied to the design of this project are listed below. • A bankfull channel designed with the appropriate dimension and cross-sectional area fo convey anticipated bankfull flows and to entrain bedload material. • Astable channel pattern extrapolated from data collected from a stable reference reach within the Silver Creek watershed. • Grade control and bank stabilization structures that enhance the environmental and ecological attributes of the stream channel though the use of natural materials and native plantings. • In-stream habitat features, such as sand/gravel bars, pooUriffle complexes, rock vanes, cross-vanes, J-hook vanes, log vanes, root wad bank stabilization structures, step-pools and re-establishment of the appropriate substrate material. • Reconnection of the stream channel to a functional floodplain by making improvements to the stream channel and riparian zone that restores dimension and profile based on reference reach conditions. • Inclusion of indigenous instream and riparian plantings. Proven natural stream geometry relationships, as described by Newbury, Leopold, Wolman, Miller, Rosgen and others, are the basis for designing a stable, self-maintaining channel. These empirical relationships between channel pattern, profile and dimension and stream flow form the foundation for the restoration of the physical and biological functions of the stream. The restoration work focuses on the main channel of Silver Creek and an associated Unnamed Tributary. Full-scale restoration is proposed for the Unnamed Tributary, as well as Silver Creek's main stem. Evans, Mechwart, Hambleton & Tilton, Inc. Page i Engineers, Surveyors, Planners, Scientists ECOSYSTEM ENHANCEMENT PROGRAM Restoration Plan -Silver Creek and Unnamed Tributary EEP Contract # D05016-1 Approximately 2,959 linear feet of channel will be restored on the main stem, and approximately 1,533 feet on the Unnamed Tributary. The total stream length designated in the restoration plan is approximately 4,492 linear feet, which is consistent with the anticipated restoration length of 4,520 linear feet of stream from the original proposal. The restoration site will be monitored for a period of five consecutive years or until the required success criteria has been met as determined by the North Carolina Department of Water Quality and the US Army Corps of Engineers. Parameters that will be included in the annual stream monitoring to ensure the success of the restoration activities will include stream channel surveys (longitudinal and cross-sectional profiles), pebble counts, photographs, and vegetation surveys along the riparian buffer. 1 r • f [] 1 Evans, Mechwart, Hambleton & Tilton, Inc. Engineers, Surveyors, Planners, Scientists Page ii ECOSYSTEM ENHANCEMENT PROGRAM Restoration Plan -Silver Creek and Unnamed Tributary EEP Contract # D05016-1 1.0 PROJECT SITE IDENTIFICATION AND LOCATION 1.1 Directions to Proiect Site The proposed project is located approximately 3,000 feet east of ~Dysartsville Road and approximately 2,500 feet south of Patton Road, west of the City of Morganton, Burke County, North Carolina as shown on Figure 1. The project spans properties owned separately by Mr. and Mrs. Frank Queen and Mr. and Mrs. Richard Conway (Seven Springs Farms, Inc.). 1.2 USGS Hydrologic Unit Code and NCDWO River Basin Designations The Silver Creek watershed is located within the Catawba River Basin. The project stream reaches are mapped on North Carolina Department of Transportation Light Detection and Ranging (LiDAR) coverage and are located within USGS Catalog Unit Number 03050101 and Local Watershed 14- digit basin 03050101050050, as shown on Figure 2. Silver Creek restoration project is located in a wide, Rosgen Valley Type VIII, approximately 8.25 miles upstream from the confluence of Silver Creek with the Catawba River. 1.3 Proiect Vicinity Ma Figure 1 presents the project Site Vicinity Map. a r~ J r Evans, Mechwart, Hambleton & Tilton, Inc. Page 1 Engineers, Surveyors, Planners, Scientists 1 t 1 1 r 1 1 L' ECOSYSTEM ENHANCEMENT PROGRAM Restoration Plan -Silver Creek and Unnamed Tributary EEP Contract # D05016-1 2.0 WATERSHED CHARACTERIZATION 2.1 Drainage Area The drainage area tributary to the downstream, limits of the project on the main stem of Silver Creek is 8.26 square miles or 5,287 acres. The associated Unnamed Tributary has a contribution drainage area of 0.08 square miles or 48 acres. These watershed areas are shown on Figure 2. Drainage areas for the project site are summarized in Table 1. TABLE 1 Drainage Areas Project Number D05016-1 (Silver Creek and Unnamed Tributa ) Reach ; Draiuxge `Area (Acres)- , Reference Reach -Brindle Creek* 746 Silver Creek Main Stem :5,287 Unnamed Trib to Silver Creek* 48 Total . 5;237.: - *The reference reach (Brindle Creek) and Unnamed Tributary drainage areas are included in the total drainage area for the Silver Creek Main Stem (See Figure 2). 2.2 Surface Water Classification/ Water Ouality Silver Creek is currently rated as fully supporting High Quality Water and is located within a watershed that was targeted based on resource features rather than degraded water quality. Along the portion of Silver Creek within the Queen/Conway properties, Silver Creek has undergone significant bank erosion and downcutting, resulting in a disconnection from the floodplain and deposition of sediment in the stream bed. This project will restore the connection between the bankfull width and floodprone width of the channel by restoring the floodplain area. Pattern, dimension and profile will be improved through a combination of meander restoration and stabilization, instream structures installed to stabilize the streambanks, the streambed and enhance aquatic and riparian habitat. 2.3 Physio~ranhy. Geolo~y, and Soils The Silver Creek watershed is located in the Eastern Blue Ridge Foothills on the boundary between the Southern Inner Piedmont and Blue Ridge Mountains Physiographic Province of Western North ..Carolina. Soils are developed over fault-emplaced metamorphic and intrusive igneous rocks associated with the Smith River Allochthon and Sauratown Mountains Anticlinorium, uplifted and displaced during tectonic continental plate collision during the Alleghenian Orogeny about 356 million years (my) ago (Fullager and Odom, 1973). Metamorphic rocks that outcrop within the Silver Creek watershed include biotite gneiss and schist, amphibolite, megacrystic biotite gneiss, and inequigranular biotite gneiss. The plutonic igneous rock formation that underlies the stream restoration project along the main stem and the majority of the Unnamed Tributary is a migmatic granite gneiss (foliated to massive, granitic to quartz dioritic, biotite gneiss and amphibolite common). The spring that defines the top of the Unnamed Tributary emerges from an outcropping of metamorphosed plutonic granitic rock, radioactive dated to Evans, Mechwart, Hambleton & Tilton, Inc. Page 2 Engineers, Surveyors, Planners, Scientists ECOSYSTEMENHANCEMENT PROGRAM Restoration Plan -Silver Creek and Unnamed Tributary EEP Contract # D05016-1 approximately 455-540 my. The exposed rock is equigranular to megacrystic, foliated to massive and includes the Toluca Granite (Fullager and Odom, 1973). The soils along the main stem of Silver Creek that have been derived from and developed over these metamorphic and plutonic igneous rock formations include the Colvard Series consisting of loamy sediments ranging from 40 to 60 inches or more in thickness over deposits of sandy, loamy gravelly to cobbly sediments. Rock fragments range from 0 to 15 percent to a depth of 40 inches, and from 0 to 80 percent below 40 inches. Flakes of mica range from a few to common (USDA NRCS, 1/3/06). Along the Unnamed Tributary the Rhodhiss Series is present and is residuum from the underlying felsic crystalline bedrock. The Rhodhiss sandy to sandy-clay loam is found on 25 to 40 percent hillside slopes with a depth to bedrock greater than 60 inches. The depth to the top of the argillaceous (clayey) horizon ranges from 2 to 20 inches. The depth to the base of the argillaceous horizon is 20 to 60 inches or more. The pedon contains 0 to 20 percent mica flakes throughout, with mica content ranging up to 35 percent below a depth of 40 inches when the C horizon is present. Soils mapping and taxonomic descriptions are from the NRCS Soil Survey of Burke County, North Carolina (USDA NRCS, 1/3/06), and were provided by the Burke County Soil & Water Conservation District. Figure 3 shows the boundaries of mapped soil units within the project site and vicinity. Valley Type VIII (Rosgen, 1996) is most readily identified landform along the main stem corridor, with the presence of river terraces positioned laterally along the broad valley with gentle, down- valley elevation relief in the project vicinity. Alluvial terraces and floodplains are the predominant depositional features and produce a high sediment supply. First-order, Rosgen Type I v-shaped valleys and Type II narrow colluvial valleys, with their associated A and B type stream channels, respectively, dominate the upper reaches of the watershed. Second- and third-order streams within the watershed are attributed to alluvial riverine depositional processes where Rosgen Type VIII valleys with classic C3 to CS channel types are the natural endpoints of landform evolution. Elevations within the watershed range from 2,818 feet above mean sea level (MSL) at Silver Creek Knob at the headwaters at the Burke County/Rutherford County line to below 1,120 feet MSL at the downstream limits of the stream restoration project. The resulting relief is 1,698 feet, from the headwaters to the downstream limits of the project, located approximately 5.3 miles downstream (north) from the watershed divide. 2.4 Historical Land Use and Development Trends Within the watershed boundaries of the project, land use is predominantly agricultural, including row crop production and pasture/hay land with wooded and cleared hillsides. Land use in the vicinity of the project is not expected to change in the foreseeable future. Table 2 presents a breakdown of land use with the local watershed based upon USGS National Land Cover Data (NLCD, 2001). 1 Evans, Mecbwart, Hambleton & Tilton, Inc. Page 3 Engineers, Surveyors, Planners, Scientists 1 } [! 1 a 1 n Il 1 1 1 1 ECOSYSTEMENHANCEMENT PROGRAM Restoration Plan -Silver Creek and Unnamed Tributary EEP Contract # D05016-1 TABLE 2 Silver Creek Watershed Land Use Summary Project Number D05016-1 (Silver Creek and Unnamed Tributarvl _ llescri tion ~ Count S Meters Acres 5 Mi Percent _ G en water 33 29700 7.34 0.011 0.1 Develo ed, o ens ace 1222 1099800 271.77 0.425 5.4% Develo ed, low intensit 25 22500 5.56 0.009 0.1% Develo ed, medium intensit 7 6300 1.56 0.002 0.0% Barren land rock/sand/cla 27 24300 6.00 0.009 0.1 Deciduous Forest 13871 12483900 3084.84 4.822 60.7% Ever een Forest 1566 1409400 348.27 0.544 6.9% Mixed Forest 5 4500 1.11 0.002 0.0% Shrub/Scrub 1334 1200600 296.67 0.464 5.8% Grassland/Herbaceous 1117 1005300 248.41 0.388 4.9% Pasture/Ha 3360 3024000 747.25 1.168 14.7% Cultivated Cro s 79 71100 17.57 0.027 0.3% Woodv Wetlands 187 168300 41.59 0.065 0.8% Totals 20,549,700 5,287 8.26 100.0°/a The following map identifies the distribution of land uses within the local watershed. Evans, Mechwart, Hambleton & Tilton, Inc. Engineers, Surveyors, Planners, Scientists Page 4 L ECOSI STEM ENHANCEMENT PROGRAM RBSf01'Clf10T7 P~UlI - Sl~l'eT' C~l'e~~~ [lih~ ~jllilClil2E[~ Tl'lhl[lCl1`I' EEP C071CiYlC=C # ~~SUI r5-1 Silver Creek Watershed - USGS National Land Cover Dataset (NLCD) 2001 v l 1 4 1 ., 1 t L 1 1 t 1 1 ,t t 1 Legend ~~.~ Burke CounFj boundary Silver Creek Nlatershed - Streams IUSGS DLG hydrographyi Open Water Developed, Open Space Developed. Lo~•; Intensity ® Developed. Medium Intensity ® Developed, High Intensity Barren Land (r?ockiSand/Clay Deciduous Forest Evergraen Forest Mixed Forest ShrubrScrub Grassland!Herbaceous Pasture!Hay ® Cultivated Crops Woody Wetlands Burke County McDowell County y,...~ ., ,~ ` ,' Rutherford County Scale 1:43,000 (1 in = 4,000 ki 0 2,000 4.000 8,000 12.000 16,000 ri Feet Evans, Mechwart, Hambleton & Tilton, Inc. Pcage 5 E~a~gistee~•s, Siir~>~evors, Planners, Scie~itists ECOSYSTEM ENHANCEMENT PROGRAM Restoration Plan -Silver Creek and Unnamed Tributary EEP Contract # D05016-1 2.5 Endangered/ Threatened Species Table 3 presents the Federally-listed Threatened or Endangered Species in Burke County, NC according to the US Fish and Wildlife Service website (http://nc-es.fws.gov/es/countyfr.html; last update 3/7/2002). TABLE 3 Federal Threatened and Endangered Species in Burke County Project Number D05016-1 (Silver Creek and Unnamed Tributa Common Name 'Scientific Name Federal Status Know Occurrences Bald Eagle Halieeatus Threatened Current leucoce halus Bog Turtle Clemmys Threatened Current muhlenber ii Dwarf-flowered Hexastylis naniflora Threatened Current Heartleaf Heller's Blazin Star Liatris helleri Threatened Current Mountain Golden Hudsonia montana Threatened Current Heather Small-whorled Isotria medeoloides Threatened Current 0 onia S readin Avens Geum radiatum Endan ered Historical The "Known Occurrences" column refers to the last time the species was observed in a particular county, according to the species distribution maps from the North Carolina Natural Heritage Program dataset. "Current" means that the species was seen in the county within the last 20 years, and "Historical" means that the species was last observed in the county more than 20 years ago. Species accounts for each of these Threatened and Endangered species were obtained from the US Fish and Wildlife Service website to determine whether suitable habitat exists within the project area. A request for asite-specific search of the North Carolina Natural Heritage Program Database was made to the North Carolina Department of Environment and Natural Resources (NCDENR). The search revealed no records of any rare species, significant natural communities, or priority areas within the Silver Creek project area, nor within a mile of the site. Based on a review of all available information, including a site visit, no habitat for any of the listed species is present on the site. Due to a lack of available habitat, the Silver Creek project is not likely to have an adverse effect on any federally-listed threatened or endangered species. This. information was presented in the Categorical Exclusion report submitted to and accepted by the Federal Highway Administration and State of North Carolina. 2.6 Cultural Resources A literature review was prepared by EMH&T and submitted to the North Carolina Department of Cultural Resources, State Historic Preservation Office (SHPO) for review. In correspondence dated August 9, 2005, the SHPO recommended that the project area be surveyed for the presence of prehistoric and historic archaeological sites. Phase I Cultural Resources Management investigations Evans, Mechwart, Hambleton & Tilton, Inc. Page 6 Engineers, Surveyors, Planners, Scientists ECOSYSTEM ENHANCEMENT PROGRAM Restoration Plan -Silver Creek and Unnamed Tributary EEP Contract # D05016-1 were conducted by the Archaeological Division of EMH&T, Inc. for the project area during the month of August, 2005 (ER-OS-1636). No historic buildings or structures were identified in the area of potential effect, and documentation of the survey methods and findings were provided to SHPO for review. EMH&T recommended no further archaeological investigation be conducted for the project site. In correspondence dated November 15, 2005, Mr. Peter Sandbeck, the SHPO Administrator, concurred with this determination. 2.7 Potential Constraints There are no constraints that have potential to adversely impact or limit improvements associated with the Restoration Plan for Silver Creek and the associated Unnamed Tributary. 2.7.1 Property Ownership History and Boundary The project site lies entirely within two tracts of land. The first tract is owned by Frank H. Queen and Sarah M. Queen (Map: 89 Page: 38, Blk. Lot: 4 7U, Deed Reference: Book 222 Page 654) containing approximately 156.25 acres; the second tract is owned by Seven Springs Farms, Inc., Richard P. Conway, President, Elizabeth B. Conway, Secretary, (Map: 89 Page: 38, Blk. Lot: 4 10U, Deed Reference: Book 1083 Page 924) containing approximately 324.37 acres. Both tracts are located in Silver Creek Township, Burke County, North Carolina. 2.7.2 Site Access Access to the site is provided from Dysartsville Road across Seven Springs Lane as shown on Figure 1 1 1 1 i 2.7.3 Utilities To the best of our knowledge, there is only one utility located within the project corridor. An overhead electric line owned by Rutherford Electric Membership Corporation is present along the Unnamed Tributary to Silver Creek. The project will not disturb this existing utility, nor will the electric line hinder the construction of the project. The location and designation of that utility are shown on the Restoration Plan design sheets contained in Appendix 1. Evans, Mechwart, Hambleton & Tilton, Inc. Engineers, Surveyors, Planners, Scientists Page 7 1 ECOSYSTEMENHANCEMENT PROGRAM Restoration Plan -Silver Creek and Unnamed Tributary EEP Contract # D05016-1 3.0 PROJECT SITE STREAMS 3.1 Channel Classification Silver Creek Main Stem The North Carolina DWQ Stream Classification Form was completed for the Silver Creek reach and is included in Appendix 2. The stable, natural channel form for the main stem of Silver Creek is a Rosgen C4 stream type, based on detailed, quantitative analysis of a stable reference reach located approximately 2.4 miles upstream from the top of the altered reach within the Silver Creek watershed. Agricultural land use and channel incision have altered the channel throughout the project reach, resulting in its present unstable F4 type. The incised nature of the cannel is attributed to channelization and isolated areas of cattle intrusion, which resulted in vegetative denuding and bank destabilization from hoof shear. The restoration plan for Silver Creek utilizes proven geomorphological approaches developed by understanding and implementing stable channel dimension, pattern and profile, based on data extrapolated from reference reach boundary conditions and superimposing stable dimension, pattern and profile on the unstable form. The approach will incorporate re-establishing a floodplain with appropriate elevation, width and valley slope, emulated from stable attributes measured, quantified and extrapolated from the reference reach boundary conditions. Unnamed Tributary to Silver Creek The North Carolina DWQ Stream Classification Form was completed for the Unnamed Tributary to Silver Creek and is included in Appendix 2. At the top of the Unnamed Tributary the stream emerges from a granite bedrock spring at altered profile survey station 15+10. From profile station 15+10 to station 5+00, the channel form is a classic Type Ivalley-confined, Al-A2 stream type with some bedrock control. In-stream boulders and flood-placed woody debris from leaning or fallen trees are present along the reach. The banks are unstable and steep to undercut. The vegetated riparian corridor along the Unnamed Tributary is visibly impaired. Cattle intrusion has adversely impacted the entire tributary as evidenced by vegetative denuding and bank failure attributed to hoof shear. Agricultural land use (pastureland) adjacent to the stream corridor and uncontrolled cattle access to the stream for drinking water and shade has resulted in unstable, steep to undercut stream banks, accelerated down-slope movement of colluvium into the stream channel and severe to extreme streambank erosion. The denuded, unstable streambanks are contributing large volumes of sediment and suspended solids to the larger Silver Creek watershed. 1 1 1 t The Unnamed Tributary, in its natural form, is a Rosgen Al-A2, transitioning to a B4-BS stream type with bed materials ranging in size from silt and sand to large cobbles and boulders from the bottom to the top of the stream reach. The transition from a v-shaped, Type I Valley confined "A" channel to a Type II colluvial valley "B4-BS" stream type occurs at approximate altered profile station 5+00 along the lower one-third of the impaired reach. Along this final 500 linear feet stream segment, the thalweg profile gradient flattens to less than four percent (0.04 ft/ft) and the floodplain widens enough to allow small meanders to form across the width of the stream's narrow floodplain. Since the terrain is less rugged along this stream segment, it is the preferred watering location for cattle grazing in the adjacent pastureland within the small, 48-acre watershed. An abandoned terrace exists adjacent to and along the right bank from altered profile station 2+00 to the bottom of the reach at altered profile station 0+00, where the stream emerges onto Silver Creek's Valley Type VIII Evans, Mechwart, Hambleton & Tilton, Inc. Page 8 Engineers, Surveyors, Planners, Scientists 1 ECOSYSTEM ENHANCEMENT PROGRAM Restoration Plan -Silver Creek and Unnamed Tributary EEP Contract # D05016-1 flood lain u stream from its confluence with another Unnamed Tributa . Ap roximatel 250 feet p p n' P Y downstream from the confluence of the two unnamed tributaries is the confluence point with the main stem of Silver Creek. 3.2 Discharge Silver Creek Main Stem For Silver Creek, bankfull discharge was determined through quantitative analysis of stable reference reach boundary conditions and comparison of predicted bankfull discharge through a stable riffle section located approximately 2.4 miles upstream from the impaired reach (project area). The reference reach is a stable, Rosgen C4 stream type with excellent connection to its healthy, deciduous hardwood forest floodplain. Calculated discharge for the reference reach riffle section was compared to stratified C-type streams data from Bankfull Regional Curves for North Carolina Mountain Streams data set, as included in the appendices of the multi-agency Stream Mitigation Guidelines document (USAGE Wilmington District et al., 4/03). The calculated discharge using quantified reference reach data provided a very close match to the stratified data set. Bankfull characteristics for the altered main stem reach were extrapolated from the stratified dataset. Bankfull discharge at the top of the impaired reach, with a drainage area of 8.01 square miles and interpolated from the regional curve data set, is 460 cubic feet per second (cfs). Independent HEC-RAS modeling predicted the same flow for this position in the watershed, verifying the bankfull discharge fora 1.7-year return interval flow, extrapolated from the stratified dataset. Unnamed Tributary 11 dischar e for the Unnamed Tributa was inte reted directl from re ession a uations Bankfu g ry rp y gr q published with the Bankfull Regional Curves for North Carolina Mountain Streams. The mountain streams regional curves data sets do not include data for A and B stream types with drainage areas less than one square mile. Therefore the regression equations developed from the regional curves data sets were used to extrapolate beyond the lower limits of verified bankfull dimensions, discharge and drainage area relationships. The area of a surveyed riffle cross-section near the bottom of the Unnamed Tributary reach, however, very closely matches the empirical relationship between drainage area and bankfull cross-sectional area extrapolated from the published regional curve data for North Carolina mountain streams. The predicted bankfull discharge for the Unnamed Tributary is 14.4 cfs. 3.3 Channel Morphology As previously noted, existing morphology along the Silver Creek main stem altered reach is Rosgen Valley Type VIII. The pre-restoration channel is an unstable F4 stream type. The restoration goal is to re-establish pattern, profile and dimension consistent with the stable C4 reference reach boundary conditions. Table 4 summarizes the morphological data for Silver Creek and the reference reach. r 1 Evans, Mechwart, Hambleton & Tilton, Inc. Engineers, Surveyors, Planners, Scientists Page 9 1 1 1 t i 1 1 1 t 1 a 1 ECOSYSTEM ENHANCEMENT PROGRAM Restoration Plan -Silver Creek and Unnamed Tributary EEP Contract # D05016-1 TABLE 4 Morphological Data For Silver Creek and Reference Reach Pro'ect Number D05016-1 (Silver Creek and Unnamed Tributa Item ~ Existing Designed Designed Reference Reach Conditions Conditions Conditions LOCATION Silver Creek Silver Creek Unnamed Brindle Creek, Trib Main Stem Main Stem Tributary to Silver Ck STREAMS TYPE F4 C4 Al-A2 to B4-BS C4 DRAINAGE AREA, Ac-Sq 5127.15 Ac - 5127.15 Ac - 48 Ac -0.08 Sq 745.75 Ac - 1.16 Mi 8.01 Sq Mi 8.01 Sq Mi Mi Sq Mi BANKFULL WIDTH (Wb~, ft 30.0 ft 30.0 ft 8.0 ft 24.0 ft BANKFULL MEAN DEPTH 7-9 ft 3.0 ft 0.5 1.28 ft (d~,ft b WIDTH/DEPTH RATIO 3.3 - 4.3 9.0 16 18.77 (W /d bkf b BANKFULL XzSECTION 210-270 ft 90 ft 3.5 ft 30.77 ft AREA (Ab~, ft BANKFULL MEAN 1.7-2.2 fps 5.1 fps 4.2 fps 3.19 fps VELOCITY, fps BANKFULL DISCHARGE, 2300 cfs* 460 cfs 14.7 cfs 98.16 cfs cfs BANKFULL MAX DEPTH 9 ft 4.2 ft .OS 1.86 ft (d ), ft WIDTH Flood-Prone Area 40 ft 80 - 145 ft Valley Confined 232 ft (W ), ft to 15 ft fpa ENTRENCHMENT RATIO 1.3 2.7 - 4.8 1.0 - 1.9 9.66 (ER) MEANDER LENGTH (Lm), 0 - 550 180 - 190 0 - 80 90 - 120 ft --- - - *Flow rate representative of the 5-year return interval event based on H1/C;-KAS analysis. t3asecl on existing conditions, the 5-year peak discharge storm event will fill the existing channel (i.e., bankfull discharge) and flow out onto the existing floodplain. The Unnamed Tributary is a Rosgen Al-A2, transitioning to a B4-BS stream type in the lower third of the reach and has been impaired by agricultural impacts (mainly clearing of native deciduous hardwood forest to create pastureland and impacts associated with cattle intrusion, as previously noted). 3.4 Channel Stability Assessment Silver Creek Main Stem In its present state, the stream channel's unstable width to depth ratio (3.3 - 4.3), entrenchment ratio (flood prone width/bankfull width = 1.3), relatively flat profile slope (0.0027 ft/ft) and poorly Evans, Mechwart, Hambleton & Tilton, Inc. Page 10 Engineers, Surveyors, Planners, Scientists ECOSYSTEM ENHANCEMENT PROGRAM Restoration Plan -Silver Creek and Unnamed Tributary EEP Contract # D05016-1 defined active streambed has resulted in a deeply incised channel disconnected from its floodplain. Mid-channel, lateral, and transverse sand and gravel bar deposits are present at locations throughout the entire reach, demonstrating the stream lacks stable pattern, profile and dimension to entrain its bedload. The locations of these depositional features in the near bank region deflects flows from the center of the channel toward the incised vertical banks, accelerating streambank erosion. Near bank stress at a critical riffle cross-section, located at altered reach profile station 12+52.50, is approximately 2.24 lbs/square foot, based on design calculations. The near vertical, denuded 8-feet streambanks at this location are typical of the existing impaired stream reach within the main stem project corridor. Utilizing the near bank stress method algorithm included in RiverMorph® v.4.0, it is estimated 5,570 cubic yards per year (or 6,980 tons per year) of sediment is being eroded from the unstable stream banks along the main stem. Bank Erosion Hazard Index (BEHI) and sediment export ' estimates are included with the information in Appendix 3. Silver Creek is a vertically contained stream that has abandoned its floodplain due to a lowering of base level and is characterized by 7 to 9 feet high, near vertical stream banks. The consequence of channelization, cattle intrusion, confinement (lateral containment), major floods, changes in sediment regime and loss of riparian vegetation are attributed causes and effects for existing conditions along the altered reach. The effects of these anthropogenic changes are accelerated streambank erosion, land loss, aquatic habitat loss, lowering of the water table, land productivity reduction and in-stream and downstream sedimentation. Unnamed Tributary to Silver Creek a 1 1 1 1 1 t 1 The Unnamed Tributary channel is a classic Type I valley confined, Al-A2 stream type transitioning to a Type II colluvial valley, B4-BS stream type in the lower third of the altered reach. The upper two-thirds of the reach exhibits some bedrock control, in-stream boulders together with flood placed woody debris from leaning or fallen trees along the unstable, steep to undercut streambanks. The impaired riparian vegetative communities exacerbate streambank erosion rates and down-slope movement of colluvium. Cattle intrusion has adversely impacted the entire tributary as evidenced by vegetative denuding and bank failure attributed to hoof shear. Agricultural land use (pastureland) adjacent to the stream corridor and uncontrolled cattle access to the stream for drinking water and shade has resulted in unstable, steep to undercut streambanks, and accelerated severe to extreme streambank erosion. The unstable streambanks are contributing large volumes of suspended sediment and bedload material to the larger Silver Creek watershed. Utilizing the near bank stress method, adjusted for channel pattern and depositional features algorithm included in RiverMorph® v.4.0, it is estimated 290 cubic yards per year (or 375 tons per year) of sediment is being eroded from the unstable stream banks along the Unnamed Tributary. BEHI and sediment export estimates are presented in Appendix 3. Representative photographs of the Unnamed Tributary are presented in Appendix 4. 3.5 Bankfull Verification Silver Creek Main Stem As noted in Section 3.2, for Silver Creek main stem, Bankfull discharge was determined through quantitative analysis of stable reference reach data and comparison of predicted Bankfull discharge through a stable riffle section located approximately 2.4 miles upstream from the impaired reach (project area). Drainage area discharge relationships for the reference reach riffle section were Evans, Mechwart, Hambleton & Tilton, Inc. Engineers, Surveyors, Planners, Scientists Page 11 i t 1 1 1 1 1 L' 1 1 1 ECOSYSTEM ENHANCEMENT PROGRAM Restoration Plan -Silver Creek and Unnamed Tributary EEP Contract # D05016-1 compared to stratified C-type streams data from Bankfull Regional Curves for North Carolina Mountain Streams data set. The calculated discharge using quantified reference reach data provided a very close match to the discharge extrapolated from the stratified data set. Bankfull discharge at the top of the impaired reach, with a drainage area of 8.01 square miles was extrapolated from the from stable reference reach boundary conditions, with adjusted drainage area tributary to the altered reach (8.01 mil) with a calculated bankfull discharge of 461 cubic feet per second (cfs). Independent HEC- 1ZAS modeling predicted the same flow for this position in the watershed, verifying the bankfull discharge fora 1.7-year return interval flow. Unnamed Tributary Bankfull characteristics for the Unnamed Tributary were interpreted directly from regression equations published with the Bankfull Regional Curves for North Carolina Mountain Streams. The mountain streams regional curves data sets do not include data for A and B stream types with drainage areas less than one square mile. Therefore the regression equations developed from the regional curves data sets were used to extrapolate beyond the lower limits of verified bankfull discharge, dimension and drainage area empirical relationships. The area of a surveyed riffle cross- section at altered profile station 1+15 near the bottom of the Unnamed Tributary reach, however, very closely matches the empirical relationship between drainage area and bankfull cross-sectional area extrapolated from the regression equations published regional curve data for North Carolina mountain streams. The surveyed bankfull cross-sectional area (ABA) is 3.9 ftZ. The ABA derived from the published power function regression equation, ABA = 22.1 AW0~67, where AW is the watershed area in square miles (for the Unnamed Tributary, the drainage area is 0.08 square miles). This equation yields a bankfull cross-sectional area of 3.7 ftZ. The survey verification of the required cross-sectional area needed to carry the estimated bankfull discharge of 14.4 cfs from the contribution drainage area, with a predicted return interval of 1.25 years, has therefore been carried forward into the design for the impaired Unnamed Tributary reach. 3.6 Vegetation The existing riparian corridor along Silver Creek varies from wide to denuded within the project area. The wide portion consists of a mature forested corridor, while narrow and denuded areas are the result of a pine beetle infestation. A narrow forested corridor is present along the majority of the Unnamed Tributary. Typical species observed along the streams and adjancent forested areas include Pinus taeda (loblolly pine), Platanus occidentalis (sycamore) and Ilex opaca (American holly). Active cattle pasture land is present outside of the riparian corridors along both streams. Photographs of the Silver Creek corridor are included within Appendix 3, and Appendix 4 presents photographs of the Unnamed Tributary. Evans, Mechwart, Hambleton & Tilton, Inc. Engineers, Surveyors, Planners, Scientists Page 12 1 ' ECOSYSTEMENHANCEMENT PROGRAM Restoration Plan -Silver Creek and Unnamed Tributary EEP Contract # D05016-1 4.0 REFERENCE STREAMS 4.1 Watershed Characterization A stable reference reach was selected using recent aerial photography (February 2005) and NCDOT ' LiDAR contour data coverages for the drainage area tributary to the restoration project in the Silver Creek watershed. Two complete meander wavelengths along the reference reach were evaluated using accepted stream classification techniques and procedures (D.L. Rosgen, 1994). ' The location of the reference reach in relation to the project is shown on Figure 2. The top of the reference reach begins at 35°37'07" North Latitude and 81°48'58" West Longitude (NAD 83, UTM Zone 17 Coordinates 691,930.8729 N, 1,163,198.3476 E GPS Reference Point). The drainage area tributary to the reference reach is 1.16 square miles. ' Dimension, pattern, profile and substrate data were collected along the reference reach and quantitatively evaluated using RiverMorph® v.3.1 software application. Reference reach geomorphologic summary reports, dimensionless ratios, longitudinal profile, cross-sections, including photos taken at stable riffle and pool cross-section locations, are included in Appendix 5. Figure 4 presents the pattern summary for the reference reach. 4.2 Channel Classification The reference reach is a stable, Rosgen C4 stream type with excellent connection to its healthy, deciduous hardwood forest floodplain. Calculated discharge for a stable reference reach riffle cross- section was compared to stratified C Type streams data from Bankfull Regional Curves for North Carolina Mountain Streams data set. The calculated discharge using quantified reference reach data is a very close match to the stratified data's empirical relationships. ' 4.3 Discharge ' The calculated bankfull discharge, using quantified and verified reference reach data collected at a stable riffle cross-section is 96.1 cfs. The calculations are included in the information within Appendix 5. ' 4.4 Channel Morphology ' The reference reach channel morphology summary report is presented in Appendix 5. Stream channel morphology data for the reference reach, the Silver Creek main steam, and the Unnamed Tributary is presented in tabular format on Table 4. i 4.5 Channel Stability Assessment ' As shown on the photographs in Appendix 5, the plant community exists over the streambanks into the active channel along the reference reach. High root densities and depths were observed at both stable riffle and pool locations throughout the reference reach, with healthy communities of canopy, ' shrub and herbaceous species present. Best-fit trend lines drawn through the bankfull indicator points, water surface and thalweg points, respectively, on the longitudinal profile are essentially parallel. There is no indication of head cutting, downcutting, aggradation or degradation. The Evans, Mechwart, Hambleton & Tilton, Inc. Page 13 Engineers, Surveyors, Planners, Scientists ' ECOSYSTEMENHANCEMENT PROGRAM Restoration Plan -Silver Creek and Unnamed Tributary EEP Contract # D05016-1 reference reach is an extremely stable, second-order C4 stream channel, with a large gravel to small cobble streambed substrate, based on quantitative analysis of reference reach boundary conditions measured in the field. 4.6 Bankfull Verification See Section 4.2 for reference reach Bankfull verification details. ' 4.7 Vegetation The reference reach exists within asecond-growth, forested floodplain containing mature trees, saplings, and some shrubs. Tree species observed along the reference reach include Pinus taeda, Platanus occidentalis, Quercus rubra (red oak), and Fagus grandifolia (American beech). Scattered Symplocos tinctoria (common sweetleaf) shrubs were also present. Vegetative cover along the reference reach is much more dense and intact than that along Silver Creek and the Unnamed Tributary. The reference reach flows through a wide forested area, rather than a narrow riparian corridor. Vegetation along the reference reach is undisturbed, and tree roots along the channel are providing stability along the reach. Photographs of the reference reach are provided within Appendix 5. L w 0 s Evans, Mechwart, Hambleton & Tilton, Inc. Page 14 Engineers, Surveyors, Planners, Scientists ECOSYSTEM ENHANCEMENT PROGRAM Restoration Plan -Silver Creek and Unnamed Tributary EEP Contract # D05016-1 5.0 PROJECT SITE RESTORATION PLAN 5.1 Restoration Proiect Goals and Obiectives Silver Creek Main Stem ~' The ultimate goal and objective for the restoration project is to restore stable pattern, profile and dimension along the main stem of Silver Creek. This will be accomplished by raising the streambed using grade control structures (cross-vanes) to reduce critical shear stress in the near bank region while maintaining flow velocities required to entrain large gravel, based upon streambed particle size distributions collected from both the stable reference reach and the altered main stem reach. To establish the bankfull channel dimension, a floodprone bench will be constructed with appropriate elevation, width and slope, thereby restoring the floodplain area. A combination of cross-vanes, J-hook vanes and rock vane deflector weirs will be constructed at appropriate locations throughout the reach to alleviate near bank stress and associated streambank erosion. streambed structures, constructed using strategically placed boulder dual winged jetties, root ~~ wad bank stabilization structures, and log vanes will be utilized, where needed, to achieve entrainment velocities required to move silt and sand size particles through the system during normal and low-flow conditions. The streambed structures have the added benefit of creating aquatic habitat and preventing the development of deleterious depositional sand and gravel bars features within the active channel. The plan sheets detailing the design for the Silver Creek main stem (RP-3/19 through RP-8/19) are included in Appendix 1. Unnamed Tributary to Silver Creek The fundamental goal to stabilize the Unnamed Tributary within its valley confined stream channel is to stabilize steep to undercut banks with heavy coir fabric jute matting, combined with implementing an aggressive native revetment plan and excluding cattle from the riparian corridor. Step-pools will be constructed at appropriate spacing to dissipate energy during bankfull discharge events along stream segments in the upper two-thirds of the reach. The plan sheets presenting the design for the Unnamed Tributary stream (RP-9/19 through 1ZP-11/19) are included in Appendix 1. Design details are provided in sheets RP-12/19 through 1tP-14/19 in Appendix 1. 5.1.1 Designed Channel Classification 1 t The designed main stem channel is a stable C4 channel, with restored pattern, profile and dimension to entrain its bedload. The designed Unnamed Tributary stream will be restored to a stable Al-A2 stream, transitioning to a stable B4-BS stream. Table 5 summarizes the restoration structure and objectives for Silver Creek and the Unnamed Tributary. Evans, Mechwart, Hambleton & Tilton, Inc. Engineers, Surveyors, Planners, Scientists Page 1 S t iV I i ECOSYSTEMENHANCEMENT PROGRAM Restoration Plan -Silver Creek and Unnamed Tributary EEP Contract # D05016-1 TABLE 5 Project Restoration Structure and Objectives Project Number D05016-1 (Silver Creek and Unnamed Tribut 1 Restoration Station Restoration Prioritti' Existing' Designed _ Comment Segment /'. Range Tti-pe ' Approach ~ ' Linear ~ Linear= Reach ID Foota'_ e ` ` Foota~ e Reach I: 00+00 - Restoration P1 3,0391f 2,959 if Reach I Silver Creek 29+59.12 includes Main Stem restoration of stable pattern, profile, dimension, substrate and floodprone area Reach II: 0+00 - Restoration P1 1,S101f 1,533 if Reach II Unnamed 15+32.70 consist of Tributary to restoration Silver Creek of stable profile, pattern, dimension and substrate 5.1.2 Target Buffer Communities The target buffer community for both the Silver Creek main stem and the Unnamed Tributary is of the Piedmont/Low Mountian Alluvial Forest community type, as described in Classification of the Natural Communities of North Carolina (Schafale and Weakley, 1990). According to the Schafale and Weakley publication, hydrology of these areas is palustrine, seasonally or intermittently flooded on various alluvial soils. Important characteristices regarding the Piedmont/Low Mountain Alluvial forest Community according to Schafale and Weakley, 1990 include the following: - Flood carried sediment provides nutrient input to these communities, as well as serving as a natural disturbance factor. - Variation is probably most related to frequency and recentness of destructive flooding. Sites may vary due to different alluvial material and its effect on soil fertility but almost all alluvial sites are more fertile than surrounding uplands. - Piedmont/Low Mountain alluvial forests may be distinguished from mesic communities by location in a floodplain and by the presence of alluvial species such as Platanus occidentalis, Betula ni~ra, and Acer negundo. Mechwart Hambleton & Tilton Inc. Page 16 Evans, , Engineers, Surveyors, Planners, Scientists ECOSYSTEM ENHANCEMENT PROGRAM Restoration Plan -Silver Creek and Unnamed Tributary EEP Contract # D05016-1 - Piedmont Alluvial Forests ma be distinguished from Montane Alluvial Forests by the presence Y of low elevation alluvial species such as Licluidambar stXraci ua. Acer negu do. Fraxinus pennsylvanica. Ulmus americana. and Ulmus alata... 5.2 Sediment Transport Analysis 5.2.1 Methodolo~v The modified Shields Equation was used to calculate the largest entrainable particle size, based on site-specific stable and altered boundary conditions for the Silver Creek main stem and the Unnamed Tributary. (Rosgen, 1994; Williams and Rosgen, 1989; Andrews, 1984). 5.2.2 Calculations and Discussion Shields (1936) described shear stress as: T = yRS where: i =shear stress (lbs/sq. ft.) y =specific weight of water (62.41bs/cu. ft.) R =hydraulic radius (ft.), and S =channel slope (ft./ft.). To test the relationship between shear stress and mean stream velocity at multiple flow levels, Rosgen (1994) used an aggregate data set for six stream types. By plotting discharge (cfs) vs. bedload (lbs/sec) it was demonstrated a significant relationship was not found for the aggregate data set. Rosgen found, however, there is a significant empirical relationship when the same data set was stratified by stream type and shear stress (lbs/sq. ft.) was plotted vs. mean velocity (ft/sec) on a log- log scale. The magnitude of shear stress required to entrain the design particle diameter (31 mm) is 0.524 lbs/sq. ft. with a required hydraulic radius of 2.35 feet, bankfull mean depth of 2.67 feet, and a mean bankfull velocity of 4.5 ft/sec. The associated critical dimensionless shear stress (i~;*) was calculated based on the D50 particle distribution at altered main stem riffle section 12+52.5 and composite D50 particle distribution from the reference reach is 0.0098. When a composite particle distribution has been assembled for stable reference reach boundary conditions, the need for a bar sample particle distribution is negated (Wolman, 1954). Therefore the reference reach composite D50 particle size was used in the computation of T~;*). ,~ The critical dimensionless shear stress, returned from RiverMorph®, is calculated using the following equation (Williams &Rosgen, 1989): osn T~;* = 0.0834(DSOssdD50sax) ns Mechwart Hambleton & Tilton Inc. Page 17 Eva , Engineers, Surveyors, Planners, Scientists r r 1 1 ~1 i f t ECOSYSTEMENHANCEMENT PROGRAM Restoration Plan -Silver Creek and Unnamed Tributary EEP Contract # D05016-1 The following equation is used to predict the depth and slope needed to move the largest size of sediment available to the channel: d = L~~LLx~~D50sA S Where: rs =submerged specific weight of sediment DSOsax =median diameter of bar sample d =mean depth S =mean water surface slope at bankfull The required bankfull water surface slope, based on boundary conditions as noted, is 0.0037 ft./ft. The design thalweg average slope is 0.0027 ft/ft. To maintain stable geomorphic geometry relationships, streambed structures, constructed using strategically placed dual-winged boulder jetties, root wad bank stabilization structures, and log vanes will be utilized, where needed, to constrict flow and increase entrainment velocities needed to move silt and sand size particles through the system during normal and low-flow conditions and ensure critical entrainment velocity required to move the D50 design particle through the system at bankfull discharge is maintained. The streambed structures have the added benefit of creating additional aquatic habitat and will prevent the development of deleterious depositional sand and gravel bars features within the active streambed. Entrainment calculations are included in the RiverMorph design summary reports in Appendix 3. 5.3 HEC-RAS Analysis An analysis of the floodplain of the project reach of both streams was undertaken to determine the elevations and extents of the existing floodprone areas of the channel valleys. Peak discharge values for both Silver Creek and its Unnamed Tributary were calculated using regional equations contained within Estimating the Magnitude and Frequency of Floods in Rural Basins of North Carolina- Revised, published by the U.S. Geological Survey (U.S.G.S.) as Report 01-4207 in 2001. This publication contains equations to calculate peak discharge rates for multiple storm events as summarized in Table 6. TABLE 6 Peak Discharge Rates Project Number D05016-1 (Silver Creek and Unnamed Tributa ) Silver Creek- . ~. Storm Event Uimamed:Tributary (cfs) _ Upstream Project`s `Limits (cfs Dbwnstreani Pmjeet "Linuts cfs ` . _ _ 2- ear _ 23 578 594 5- ear 44 983 1010 10- ear 63 1315 1351 25- ear 93 1810 1858 50- ear 121 2245 2301 100- ear 154 2718 2788 500- ear 252 4060 4161 Evans, Mechwart, Hambleton & Tilton, Inc. Engineers, Surveyors, Planners, Scientists Page 18 1 ECOSYSTEM ENHANCEMENT PROGRAM Restoration Plan -Silver Creek and Unnamed Tributary EEP Contract # D05016-1 The peak discharge values summarized above were plotted on semi-log paper to extrapolate a 1.7- year flow event to confirm the bankfull discharge calculated independently. This plot can be found in Appendix 6 and verifies that the bankfull discharge at the upstream project limits on Silver Creek main stem is 460 cfs. The peak discharge values summarized above were entered into the U.S. Army Corps of Engineers Hydrologic Engineering Centers River Analysis System (HEC-RAS) computer program to determine the elevations of each of the various flood events. Topographic information used within the HEC- RAS analysis was taken from both aerial orthophotography and field survey information of the two project areas. The results of this analysis were utilized to confirm the extent of the floodplain for the two project areas and are included in Appendix 6. Along Silver Creek it was determined that a storm greater than a 5-year event would leave the channel and enter the floodplain. Based on the results of the HEC-RAS analysis of the Unnamed Tributary to Silver Creek, the channel is capable of conveying events larger than the 25-year event, with several locations conveying the 100-year event. The project area is shown on the Flood Insurance Rate Map (FIRM) for Burke County, Number 370034, panel 02000, dated June 17, 1991. The FIRM depicts no special flood hazard areas along Silver Creek or the Unnamed Tributary within the project area. The proposed project increases the flood carrying capacity of Silver Creek by providing an excavated floodprone bench. A hydraulic backwater analysis has been performed using the U.S. Army Corps of Engineers HEC-RAS computer model and verifies that the proposed project will not increase the flood hazard potential of Silver Creek on adjoining properties. Regarding the improvements to the Unnamed Tributary, the entire watercourse is contained to the property owners participating in the project, who understand and accept the nature of the improvements. Furthermore, the watercourse and any associated flooding are also contained within a narrow and deep valley on these properties. 5.4 Stormwater Best Management Practices 5.4.1 Site-Specific Stormwater Concerns Silver Creek Main Stem The watershed area for Silver Creek within the project corridor is more than 8 square miles. As such, conventional methods for channel de-watering during construction of in-stream features are not practical for use on this project. All stormwater best management practices (BMP's) will be confined to areas outside and adjacent to the stream channel, reducing the possibility of sediment from denuded lands getting into the channel. Unnamed Tributary to Silver Creek Due to the small watershed area for this channel, stormwater BMP's will be applied that intercept and treat all stormwater flows from the watershed prior to their release to the downstream receiving channel. Evans, Mechwart, Hambleton & Tilton, Inc. Page 19 Engineers, Surveyors, Planners, Scientists ECOSYSTEMENHANCEMENT PROGRAM Restoration Plan -Silver Creek and Unnamed Tributary EEP Contract # D05016-1 5.4.2 BMP Device Descri tion and A lication Design sheets RP-15/19 and RP-16/19 contained in Appendix 1 of this document detail the various BMP applications and provide an indication of their location along the project corridor, for both the main stem of Silver Creek and the Unnamed Tributary. The design sheets also includes notes and references for the installation and maintenance of these features. There are also notes specific to construction sequence, intended to reduce the impact of sedimentation within the project corridor. Further discussion of the two different scenarios is provided below. Silver Creek Main Stem As described previously, all BMP applications will be outside of the channel. Essentially, it is proposed that sediment barrier fencing or straw waddles be applied as a buffer between the stream channel and adjoining denuded areas. Where there are areas of concentrated flow coming to the stream channel from the adjoining areas, then a method will be applied to convey that flow directly to the stream channel without passing through the denuded areas. This may include temporary culverts, or rock or fabric lined drainage swales. The determination of these locations and the appropriate application will be coordinated with the contractor prior to and during construction. Unnamed Tributary to Silver Creek As described previously, the approach to stormwater BMP along this watercourse is to capture and treat sediment laden flows prior to reaching the downstream channel. That can be accomplished using a sediment trap at the downstream end of the project corridor. Maintenance of that feature will be important to ensure that it provides the required storage volume for the capture of sediment for the duration of the project. Furthermore, the contractor may choose to use conventional de-watering practices to facilitate construction of the many in-stream features included along the project corridor. 5.5 Natural Plant Communi Restoration 5 5.1 Plant Community Restoration Plan The proposed riparian planting plan was developed by integrating the native plant species observed on site along with selected species known to inhabit the Piedmont/Low Mountain alluvial forest community type as described in Classification of the Natural Communities of North Carolina (Schafale and Weakley, 1990) to institute species diversity. According to the Schafale and Weakley publication, hydrology of these areas is palustrine, seasonally or intermittently flooded on various alluvial soils. Important characteristices regarding the Piedmont/Low Mountain alluvial forest community according to Schafale and Weakley, 1990 include the following: - Flood carried sediment provides nutrient input to these communities, as well as serving as a natural disturbance factor. - Variation is probably most related to frequency and recentness of destructive flooding. Sites may vary due to different alluvial material and its effect on soil fertility but almost all alluvial sites are more fertile than surrounding uplands. Evans Mechwart Hambleton & Tilton Inc. Page 20 > > Engineers, Surveyors, Planners, Scientists r r ECOSYSTEM ENHANCEMENT PROGRAM Restoration Plan -Silver Creek and Unnamed Tributary EEP Contract # D05016-1 - Piedmont/Low Mountain alluvial forests may be distinguished from mesic communities by location in a floodplain and by the presence of alluvial species such as Platanus occidentalis. Betula nigra, and Acer negundo. - Piedmont Alluvial Forests may be distinguished from Montane Alluvial Forests by the presence ~, of low elevation alluvial species such as Liauidambar s , raciflua, Acer negundo, Fraxinus pennsylvanica, Ulmus americana, and Ulmus alata... Silver Creek Mainstem Along the mainstem of Silver Creek, the majority of the restored riparian zone will be located within the created bankfull bench and toe slope areas. The restored streams will be fully replanted with the appropriate native species in the form of live stakes or bare-root material, along with some larger specimens (1 gallon container size). Planting zones have been designated for Silver Creek as described in the tables below. The bare root seedlings will be planted during the fall or early spring seasons, as soon as possible after the completion of the earthwork associated with constructing the new stream channels. During the following fall, supplemental shrub and tree species will be planted if survival rates of previously planted seedlings are below target densities as determined in late summer (August-September). Final species selection will be based upon availability. In addition to planting described below, temporary and permanent seeding will occur in Zones 2, 3 & 4. The planting plan is presented in the schematic engineering drawings, included on design sheet RP-17/19 in Appendix 1. Proposed Silver Creek Plantings ® • Zone 1 -Outside Meander bends Live branches, 2x2' centers Common Name Silky dogwood Southern arrowwood viburnum Elderberry Black willow • Zone 2 - Streamside Shrubs and Trees Shrubs - 4x4' centers Common Name Painted buckeye Silky dogwood Tag alder 1 t Black willow Elderberry Southern arrowwood viburnum American hazelnut Scientific Name Cornus amomum Viburnum dentatum Sambucus canadensis ... Salix nigra Scientific Name Aesculus sylvatica Cornus amomum Alnus serrulata Salix nigra Sambucus canadensis Viburnum dentatum Corylus americana Evans, Mechwart, Hambleton & Tilton, Inc. Engineers, Surveyors, Planners, Scientists Page 21 ECOSYSTEMENHANCEMENT PROGRAM Restoration Plan -Silver Creek and Unnamed Tributary EEP Contract # D05016-1 • Zone 2 - Streamside Shrubs and Trees cont. Trees - 100 foot spacing (1 gallon container size) Common Name Scientific Name Box elder Acer negundo River birch Betula nigra Sycamore Platanus occidentalis Sweet gum Liquidambar styraciflua Green ash Fraxinus pennsylvanica Tulip poplar Liriodendron tulipifera American elm Ulmus americana Bitternut hickory Carya cordiformis • Zone 3 - Floodplain 8x8' centers Common Name Scientific Name Box elder Acer negundo River birch Betula nigra Sycamore Platanus occidentalis Sweet gum Liquidambar styraciflua Green ash Fraxinus pennsylvanica Tulip poplar Liriodendron tulipifera American elm Ulmus americana Bitternut hickory Carya cordiformis • Zone 4 - 30' Riparian Buffer 10x10' centers Common Name Scientific Name White ash Fraxinus alba Black walnut Juglans nigra Tulip poplar Liriodendron tulipifera Black gum Nyssa sylvatica Black cherry Prunus serotina White oak Quercus alba Unnamed Tributary to Silver Creek Along the majority of the Unnamed Tributary to Silver Creek, a narrow riparian corridor is present. The existing riparian vegetation will be preserved to the extent possible and will be enhanced through the installation of supplemental plantings as indicated on design sheets RP-18/19 through RP-19/19 in Appendix 1. A mixture of bare-root tree material including Fraxinus alba, Juglans nigra, Liriodendron tulipifera, Nyssa sylvatica, Prunus serotina, and Quercus alba will be planted on 10' by 10' centers. Some additional larger caliper trees will also be incorporated into the plantings. In areas where cattle intrusion has caused the most damage to the corridor, bare-root material will be installed on 8' by 8' centers in addition to some larger caliper container trees. A full replanting of the echwart Hambleton & Tilton Inc. Pa a 22 Evans, M g Engineers, Surveyors, Planners, Scientists ECOSYSTEM ENHANCEMENT PROGRAM Restoration Plan -Silver Creek and Unnamed Tributary EEP Contract # D05016-1 ri arian corridor will be erformed for areas alon the stream that are cleared for restoration p p g construction, including the excavated floodplain bench and construction access points. This full replanting will follow the `zone' methodology prescribed for the mainstem of Silver Creek. 5.5.2 On-Site Invasive Species Mana eg ment "w This project proposes to treat and eradicate exotic woody vegetation by appropriate means. This will help meet one of the overall goals of the restoration project by enhancing buffers and creating habitat for birds and animals. By eradicating non-native vegetation, native vegetation will be allowed to colonize and provide a better food source for the local fauna. Before treatment, a vegetation assessment would be performed to determine extent of invasive vegetation. The most appropriate treatment options will be determined after the assessment. Possible treatments for invasive exotic vegetation include application of appropriate herbicides either through stem cut and spray or spraying of the actively photosynthesizing leaves. This work would most likely be done in the fall or winter, during the dormant season of most native vegetation. The initial treatment would likely take a week to complete. Follow up and maintenance is critical in order to eradicate any root sprouts that may occur in the following seasons. 1 a i f I Inc. Pa a 23 Evans, Mechwart, Hambleton & Tilton, g Engineers, Surveyors, Planners, Scientists ECOSYSTEM ENHANCEMENT PROGRAM Restoration Plan -Silver Creek and Unnamed Tributary EEP Contract # D05016-1 6.0 PERFORMANCE CRITERIA 6.1 Streams As discussed in the original proposal, the restoration goal for the stream is to restore the physical and i biological integrity beyond current stream conditions. Current conditions consist of modified or ^ impaired stream channels. Objectives to meet that goal of restoring these stream channels include the following: 1. Provide a stable stream channel with features indicative of a biologically diverse environment. 2. Restore the connection between the bankfull width and floodprone width of the channels by restoring the floodplain area. 3. Stabilize eroding banks. 4. Provide a functional, native riparian floodplain corridor where deficient, and preserve any existing forested corridor. 5. Improve the physical aquatic habitat features. 6. Minimize land development impacts to the stream. 7. Provide long-term protection of the stream corridor. Restoration of the streams will provide all the desired habitat and stability features necessary to improve the quality of the stream. There are many long-term benefits derived from the efforts to '~ restore the streams, such as: • reversing the effects of channel incision • stabilizing eroding channel banks • development of instream habitat features • re-vegetation of the riparian corridor with native, wildlife friendly plants • construction of a floodplain with the accompanying benefits of sediment and nutrient storage The restoration techniques proposed for the Unnamed Tributary stream will provide the attributes described above by incorporating a variety of features recognized to support the stability and biological diversity that are essential to ecosystem enhancement. Presently, these features are non- existent or diminished within Sliver Creek and the associated Unnamed Tributary. The restoration of the stream includes assessing and predicting the morphological features that will become the foundation for the construction of a stable natural channel. Considerations that have been applied to the design of this project are listed below. • A bankfull channel designed with the appropriate dimension and cross-sectional area to convey anticipated bankfull flows and to entrain bedload material. • Astable channel pattern (sinuosity) extrapolated from data collected from a stable reference reach within the Silver Creek watershed. • Grade control and bank stabilization structures that enhance the environmental and ecological attributes of the stream channel though the use of natural materials and native plantings. Evans, Mechwart, Hambleton & Tilton, Inc. Page 24 Engineers, Surveyors, Planners, Scientists ECOSYSTEM ENHANCEMENT PROGRAM Restoration Plan -Silver Creek and Unnamed Tributary EEP Contract # D05016-1 • habitat features such as sand/ avel bars ooUriffle com lexes, rock vanes, In-stream gr , p p cross-vanes, J-hook vanes, log vanes, root wad bank stabilization structures, step-pools (where appropriate) and re-establishment of the appropriate substrate material. • Reconnection of the stream channel to a functional floodplain, to be accomplished using a combination of Priority 1 (raising the stream channel) and Priority 2 (lowering the floodplain) restoration. • Inclusion of extensive instream and riparian plantings. Proven natural stream geometry relationships as described by Newbury, Leopold, Wolman, Miller, Rosgen and others, is the basis for designing a stable, self-maintaining channel. These empirical relationships between channel pattern, profile and dimension and stream flow form the foundation for the restoration of the physical and biological functions of the stream. 6.2 Stormwater Management Devices Properly installed and well maintained BMP applications should adequately mitigate the impact of sediment laden stormwater flows within the project corridor. Stormwater BMP's for the project are discussed in Section 5.4. All BMP applications will be inspected and maintained throughout the construction process and until the site is stabilized. 6.3 Vegetation The target density for the riparian buffer is to establish a minimum of 320 stems per acre after 3 years, with a minimum of 260 stems per acre at the end of the 5-year monitoring period. This would represent a minimum survival rate of 80% of the plantings. 6.4 Monitoring Schedule and Reporting The restoration site will be monitored for five consecutive years or until the required success criteria has been met as determined by the EEP, NC DWQ, and USACE. Monitoring activities will begin immediately following completion of the stream construction in order to alleviate any potential problems as they occur. Planting will occur during the fall of 2006 and possibly spring of 2007; therefore, the riparian buffer restoration will be monitored the following growing season projected to i be summer of 2007. Monitoring activities will follow the guidelines presented in the request for proposal for this project. Parameters that will be included in the annual stream monitoring to ensure the success of the restoration activities will include stream channel surveys (longitudinal and cross-sectional profiles), pebble counts, photographs, and vegetation surveys. Following the submittal of the monitoring reports to the appropriate agency representatives, the recipients of the report will be contacted for the purpose of discussing the monitoring data, required success criteria and whether or not the site is functioning as expected. If the site is not functioning as expected, a site visit will be scheduled with the review agencies so that consideration can be given to whether a remediation plan should be created and implemented. The remediation plans, if required, will directly reflect the requested alterations as discussed with the regulatory agencies, if it is determined that such alterations will correct any identified deficiencies. rt Hambleton & Tilton Inc. Pa a 25 Evans, Mechwa g Engineers, Surveyors, Planners, Scientists ECOSYSTEMENHANCEMENT PROGRAM Restoration Plan -Silver Creek and Unnamed Tributary EEP Contract # DOS016-1 -- Stream Channels Stream channel stability will be physically monitored by establishing permanent cross-sections located approximately every 500 feet along the restored channels (or no more than 2 per thousand feet). Each cross-section will be monumented for future identity and survey. All of these cross- sectional surveys will also be utilized as photographic points. Cross-section locations to be monitored will be established immediately following construction during the completion of the "as-built" survey. A longitudinal profile survey will be conducted along the entire restoration reach of the Silver Creek main stem as well as the entire Unnamed Tributary. The "as-built" report will include the constructed stream channel dimension, pattern, and longitudinal profile. This data will be utilized as baseline to compare future monitoring surveys and subsequently to determine channel stability and transition. Other data collected will include at least six pebble counts for the project, stream pattern data, and stream side plant conditions. Annual inspection of in-stream structures will also occur to verify proper function and channel stability. Stream channel monitoring surveys will be completed annually for five consecutive years, starting on Year 1 after completion of the project. Riparian Buffers Vegetation within the restored riparian buffer will be monitored for five consecutive years. Ten by ten meter square plots will be permanently established following completion of the planting phase and at least two opposing corners will be permanently installed and surveyed for future use. Approximately 5% of the project area will be monitored. A stem count of planted species will be performed within each monitoring plot. The species, density, survival rates, and the cause of mortality if identifiable will be reported for each planted species in each plot. Vegetation plots will be sampled annually and reported every year along with the data collected during the physical monitoring of the channel. The primary focus of the vegetative monitoring will be on the planted individuals in the tree and shrub strata, although herbaceous species encountered may also be recorded. Vegetation monitoring will occur between August and October. i i! mbleton & Tilton Inc. Pa a 26 Evans, Mechwart, Ha g Engineers, Surveyors, Planners, Scientists ECOSYSTEM ENHANCEMENT PROGRAM Restoration Plan -Silver Creek and Unnamed Tributary EEP Contract # D05016-1 7.0 REFERENCES Andrews, E.D. 1984. Bed-material Entrainment and HXdraulic Geometry of Gravel-Bed Rivers in Colorado, Geological Society of America, Bulletin 95, 371-378. Fullagar, P.D., and Odom, A.L. 1973. Geochronology of Precambrian Gneisses in the Blue Ride Province of Northwestern North Carolina and Adjacent Parts of Virginia and Tennessee, Geological Society America Bulletin, v. 84, p. 3065-3079. Leopold, L.B., 1994. A View of the River, Harvard University Press, Cambridge, MA. Leopold, L.B., Wolman, M.G., and Miller, J.B. 1964. Fluvial Processes in Geomorphology, W.H. Freeman, San Francisco, CA. Pfankuch, D.J., 1975. Stream Reach Inventory and Channel Stability Evaluation, USDA Forest Service, R1-75-002. Government Printing Office #696-260/200, Washington, D.C., 26 pp. Rosgen, D.L. and Silvey, H.L. 2005. The Reference Reach Field Book, Second Edition, Wildland Hydrology, Inc., Fort Collins, CO. Rosgen, D.L. 1998. The Reference Reach - A Blueprint for Natural Channel Design, ASCE Conference on River Restoration in Denver Colorado -March 1988, Reston, VA. Rosgen, D.L. and Silvey, H.L. 1998. Field Guide for Stream Classification, Second Edition, Wildland Hydrology, Pagosa Springs, CO. Rosgen, D.L. 1997. A Geomorpholo icg al Approach to Restoration of Incised Rivers, Proceedings of the Conference on Management of Landscapes Disturbed by Channel Incision, Denver CO. Rosgen, D.L., 1996. Applied River Morpholo~v, Wildland Hydrology Books, Pagosa Springs, CO. Rosgen, D.L. 2002. The Cross-Vane W-Weir and J-Hook Vane Structures: Their Description, Design and Application for Stream Stabilization and River Restoration, Wildland Hydrology, Inc. Pagosa Springs, Colorado. Schafale, Michael P. and Weakley, Alan S. 1990. Classification of the Natural Communities of North Carolina Third Approximation, North Carolina Department of the Environment, Health and Natural Resources Schumm, S.A., Harvey, M.D., and Watson, C.C. 1984. Incised Channels: Morphology, Dynamics and Control, Water Resource Publication, Littleton, CO. Shields, A. 1936. Application of Similarity Principles and Turbulence Research to Bedload Movement, Mitt. Preuss. Verschsanst., Berlin. Wasserbau Schiffbau. In W.P. Ott and J.C. Uchelen (translators), California Institute of Technology, Pasadena, CA. Report No. 167; 43 pp. Mechwart Hambleton & Tilton Inc. Pa a 27 Evans, g Engineers, Surveyors, Planners, Scientists 1 1 n ~I 1 1 1 1 1 1 -, 1 ECOSYSTEMENHANCEMENT PROGRAM Restoration Plan -Silver Creek and Unnamed Tributary EEP Contract # D05016-1 U.S. Army Corps of Engineers -Wilmington District, U.S. Environmental Protection Agency Region 4, North Carolina V~'ildlife Resources Commission, North Carolina Division of Water Quality, USDA Natural Resources Conservation Service. April 2003. Stream Mitigation Guidelines, Raleigh, NC. U.S. Department of Agriculture, Forest Service. 1994. Stream Channel Reference Sites: An Illustrated Guide to Field Technique, General Technical Report RM-245, Rocky Mountain Forest and Range Experiment Station, Fort Collins, CO. U.S. Department of Agriculture, Natural Resources Conservation Service. 1/3/06. NRCS Soil Survev of Burke County, North Carolina, provided by the Burke County Soil & Water Conservation District. U.S. Geological Survey. 2001. National Land Cover Dataset. Available for download at: http://www.mrlc.gov/mrlc2k nlcd.asp. Williams, G.P. and Rosgen, D.L., 1989. Measured Total Sediment Loads (Suspended Loads and Bedloadsl for 93 United States Streams, U.S. Geological Survey Open File Report 89-67, Denver, CO, 128 pp. Wolman, M.G., 1954. A Method of Sampling Course River-Bed Material, Transactions of American Geophysical Union 35: 951-956. Evans, Mechwart, Hambleton & Tilton, Inc. Engineers, Surveyors, Planners, Scientists Page 28 r 'p „ q TT p - _ _ ------ N Rpq p PINNACLE --- CHURCH __ -- -- - _- _, ,_ - F20AD --- _ - - -- ; - - _ __ -- Queen H. Frank _ - ' - & Sarah M. --- _ _ _. , ' ~ Map: 89 Poge: 38 Blk. Lot: 4 7U '_______ __ Deed Reference: Bk. 222 Pg. 654 ' ~ '~ ~~ '~ ELK ti _ _ - --- , ~ T ~ ~ ABBIE 1. ~ ~~ COURT F~ -- ~ __ __ SEVEN --_- - ~ J_ ---- _ SPRINGS /~ ~- LANE / _` - - ' -- Conway Elizabeth _-- - --- - __ _ _____ B. Trustee ~ ' POLLARD I Map: 89 Page: 38 Blk. Lot: 4 t3 sQ - - DOE - PATTON ~ Deed Reference: COURT ROAD Bk. 1111 P 995 g ~1 ~ I __ p~ __ - - ~' __ ~~ ~ ~ ;~ i ~ Seven Springs ~ ~ Farm Inc. Q 1 -- - --_-_ Map: 89 Page: 38 Blk. Lot: 4 10U - 1083 P 924 Bk d R f D LL ! --' -~-' _ __ - - - g. erence: . e ee i i ~, ~ i Q i ; , t i --- - ~ - _ _-- --- -_ - -- - _ N' __ ~ NG ~P~ N f \SO R~ ~ ~ _ MC _ _ _>~_ _ - a BURKE COUNTY, NORTH CAROLINA SILVER CREEK RESTORATION FIGURE 1: SITE VICINITY MAP N.C. ECOSYSTEM ENHANCEMENT PROGF Evans, Mechwart, Hambleton & Tilton, Inc. 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V o ~? O Ill 9 ~ ~ ~ ~ v ~ f: ~~ ~ `~ ~ c . C. w ~ ~ ~ q z c o a \ ~ ~ ~ \ u_ ay r - - E N Y _ 003 nO+U0 ~~NO L y \ r-wNH l E 41Y YY d E = u au u±~ = ' ~ w O w o oo, F U~m~o~m3 Z I I I ~ E rn ~ ~~ d T N N N Z y N m~ 0 w __ O y ~ C < J O m ~ ~ m ~ d pi O N y :p W tw ~ W O >> r~ w I- S _ d 0] f0 ~ .J c O 0. 0 0 D n X1 d d c t U M 0 "'~Y 4 v 1 N U ~' C ~ ~O d ~ O N ~ y U o ECOSYSTEM ENHANCEMENT PROGRAM Restoration Plan -Silver Creek and Unnamed Tributary EEP Contract # D05016-1 1 APPENDIX 2 Project Site NCDWQ Stream Classification Forms 1 yCDWQ Stream Classification Form ''roject Name: River Basin: County: Evaluator: >WQ Project Number: Nearest Named Stream: Latitude: Signature: )ate: USGS QUAD: Longitude: Location/Directions: ' LEASE NOTE: If evaluator and landowner agree that the feature is a man-made ditch, then use of this form is not necessary. if in the best professional judgement of the evaluator, the feature is a man-made ditch and not a modified natural stream-this a ing system should not be used* ~'rimary Field Indicators: (Circle One Number PerLine~ Is The USDA Texture In Streambed Is There An Active (Or Relic) Is A Continuous Bed & Bank Present? Is A 2"° Order Or Greater Channel (As Indicated ~RIMARY GEOMORPHOLOGYINDICATOR PKiID~'~'S: ] c'/ I. Hvdrolo~v Absent Weak Moderate Strong ~) Is There A Groundwater ~ YHYDROLOGYINDICATOR 'RIMAR Y BIOL O GY INDICA TOR >econdary Field Indicators: (Circle One Number Per Line) ~ Does Topography Indicate A datural Drainaee Wav? 0 5 1 SECONDARY GEOMORPHOLOGYINDICATOR POINTS:_ ~L it YLl l.fi L Vl[ CVll V l J:~` ~ECONDARYBIOLOGYINDICATOR POINTS: Z . S l'OTAL POINTS Prima + seconds --~~~ ~If Greater Than Or Equal To I9 Points The Stream Is At Least Intermittent) vCDWQ Stream Classification Form ~, w~ (~ . ~~~ ro'' ject Name: River Basin: County: Evaluator: 'WQ Project Number: Nearest Named Stream: Latitude: Signature: )ate: USGS QUAD: Longitude: Location/Directions: ASE NOTE: If evaluator and landowner agree that the feature is a man-made ditch, then use of this form is not necessary. if in the best professional judgement of the evaluator, the feature is a man-made ditch and not a modified natural stream-this sting system should not be used' rimary Field Indicators: (Circle One Number Per Line) Is The USDA Texture In Streambed Is There An Active (Or Relic) Is A Continuous Bed & Bank Present? Is A 2n° Order Or Greater Channel (As Indicated MARY GEOMORPHOLOGYINDICATOR POINTS: `'' I. Hvdrolo~v Absent Weak Moderate Stronli ~ Is There A Groundwater _ YHYDROLOGYINDICATOR POINTS: 'RIMARYBIOLOGYINDICATOR POINTS: One Number Per Line) Topography Indicate A GEOMORPHOLOGYINDICATOR POINTS: This Year's (Or Last's) Leaflitter Water In Channel And >48 Hrs. Since Water In Channel During Dry Wetland Plants In Streambed? SAV Mostly OBL Mostly FACW Mostl FAC Mostly FACU Mostly UPL TE: If Total Absence Of All Plants In Stream6ed 2 1 .75 ~ 0 0 is Noted Above Ski This Ste r ~ECONDARYBIOLOGYINDICATOR POINTS: TOTAL POINTS (Primary + Secondarv~ sGL. (If Greater Than Or Equal To I9 Points The Stream Is At Least Intermittent) t r ~i 1 t ECOSYSTEM ENHANCEMENT PROGRAM Restoration Plan -Silver Creek and Unnamed Tributary EEP Contract # D05016-1 APPENDIX 3 Project Site Design Calculations, Plots, Photographs and Summary Reports 1 r 1 1 Stream Classification Form ~f ~ ~~ ; , r >rri ~ Stream Channel Classification (Level II) .. "" ~` ~ ~ ~~~~`~~~~~ ~ ~; Stream NAME: Silver Creek & Trib Restoration, Reach -Reach 2 (Ab6ndoned Oxbow) Basin NAME: L /.~7"/,) ~~ 13,Q /Q(VL~~ Drainage AREA: 5126.4 acre 8.01 mil Location: f21 FF~. E XS ETA Ial,-f-5~ , S . S~ LV ~~ CP_E~K _ B(1~21ZF. GO. , Q(('. Twp: Rge: Sec: Qtr: Lat: 0 Long: 0 Observers: W /~ (~~, i/ ~ ~'. 1~~071~ ~(x Date: 2/8/2006 ~m __. _..~. _. _, ._ ... %. Bankfull WIDTH (Wb;~) 122.5 Feet '` WIDTH of the stream channel, at bankfull stage elevation, in a riffle section. ~ _7 ~, zr i\Iean DEPTH (db;~ 2.56 Feet c .~ , ~< Mean DEPTH of the stream channel cross-section, at bankfull stage elevation, in a riffle section. ),r; } ~ f (dtkf=~~b~ t , r ~,y, r,~ . ,~ ~ . Bankfull Cross Section Area (Ab;~) 315.9 Feetz {,4 ' AREA of the stream channel cross-section, at bankfull stage elevation, in a riffle section. ;•~ . ~;k~ : WIDTH /DEPTH RATIO (Wb;~ /db;~ .47.85 Ft/Ft ~.y Bankfull WIDTH divided by bankfull mean DEPTH, in a riffle section. .... .. , .:. , , ,, ,n.~ ~: ~_ ~~ Mazim um DEPTH dmr; 8.31 Feet ( ~ E~ H f: {~ ~ Maximum depth of the bankfull channel cross-section, or elevation between the bankfull stage and ~~_, H thalweg in a riffle section. ~. , . ~~,~; Flood-Prone Area WIDTH ~rPa) 123.4 Feet ; ,, k~;?! ~~ i The stage/elevation at which flood-prone area WIDTH is determined in a riffle section at twice ~~ : maximum DEPTH, or (2 x d,„,;~ ~ ~ ..z `~t~°~ :~< Entrenchment RATIO (ER) 1.01 FUFt ,; it The ratio of flood-prone area WIDTH divided by bankfull channel WIDTH (W~/Wb~ in a riffle ti section. T ~' ~' -~. ~' ~.. Channel Materials (Particle Size Indez) D50 38.5 mm ~~` The 50th percentile, or less than, from a pebble count frequency distribution of channel particles ~ ~.~ ~ `~ representing the median or dominant particle size. <~ _ Water Surface SLOPE (S) 0.00218 Ft/Ft ~ ~ ,~ ;,';~. Average water surface slope as measured between the same position of bed features in the profile ~., ~- "~ over two meander wave lengths. This is similar to average bankfull slope. x ~` ` Channel SINUOSITY (K) 1 ,, f i`,^ Sinuosity: an index of channel pattern, deternned from stream length /valley length, i.e. (SL/VL.); or estimated from a ratio of valley slope divided by channel slope (VS/ S). .. ; , ;_ Stream Type F 4 For Reference, see page 5-5, 5-6 1996 Applied River Morphology Rosgen y, . , . © 2005 Wildland Hydrology 1 a u n 1 t /~ ]~~~,~ Reach Summary Data Form S'1 INe.rl1 ~and~rreo~ ~k~ui ~~ ~'le, Sec~i'dh ~,~~ t~ ~.~ ~"~ ~ ~n' ~ ~ ~ n ... and ~/(v Reach Summary Data ~ a~~,~ f' `" 1~'~"~~~ ~~ " ~ , „ ~ ~:. r" ~s ~~ : r•s i i "4~ 5 :' s~~}, ..~ :~t,~ ~'~3 M .h~4.i'~i~ ' f - ;Mean Riffle Depth (dbk~ 1.83;feet Mean Riffle Width l •• bkfl 123.4;feet Mean Riftlc Arca (Abk~ € 225.5;feetz ~~ ~ ~~.. ~ " ~ Mean Pool Depth (dam,) 0, feet o : (Wb~) O;feet Mean PoolArea (Abktp) 0lfeet~ Mean Pool Width , . Ratio Mean Pool ~ 0 O ~dhk~~ Ratio Pool Width/Riffle ~ 0 OOO~ Wbkrv/ Ratio Pool Area/ ~ 0 p~~Abktp/ uu ~ Depth/Mean Riffle Depth ~ Idh„ ~t'idth 1 ~Wb~ Riffle Area ~ ~A~ ~.r~ ~~ ~~ O;feet Max riffle depth/Mean riffle depth; 4.142 ~ bfa~ Riffle Depth (dm,;~ 7.58;feet 1,1<ati Pool Depth (d~,r,„,) ;ry ~ , t ' Msr pool depth/Mean riffle depth; ~ o ~~+~:~~~_= F~ ~~~~r `M -~ Point Bar Slope 0 U ' ; 3 ch Streamflow. Estimated Mean \'clocity at Rankfl~ll Sta e l u , , I ~f~; ft s rti' mahon ATethod Esti „~~ Streamflow: EstimatedDischargc at Bankfiill tita~~e (Qnr~ 4r,1 ~cfs Drainage Area ~ t~l;mi` ~ . - ; it .~v°~ t < f `~>= t ~ ~ ` A ~b'fi 1 k~ ..M x r.,x~''~v~ r= Y .'`i ~y `''1 ~n z .~,7, c ~ Y~ ,~ .~.strl ~~ t 1~e~'~~tr ~= ° ''~i l C" ;' R ''~ ~ " ` = ye ~•: ' eomc » . ,~ n a ess o e ; l s menstp ,~ % ~ . ~ 9 r ? ~- a.. ; Meander Length (Lm) ~ 01 0~ O~feet Tvteander Let-gth Ratio (Lni~Wekd ~ 0.0001 0.000 0.000 ~ .., ,"~. ~ iRadiusofCur~ature(Rc) 0; 0; Olfeet Radius ofCurvature/RiftlcWidth(Re/Wb~ ; 0.000; 0.000; 0.000 at Belt \\'idth (Wbtr)~.. 0; 0; Olfeet Mc:uider Width Ratio (V6 mr~Vbkr) 0.000; 0.000; 0.000 c c r . Ltdi~ idual Pool Length 1 31.95; 25.75; 36.OSIfeet Pool Length/Riffle Width 0.259; 0.209; 0.292 Pool to Pool Spacing ~ 119.1 ~ 101.11 137.21feet Pool to Pool Spacing/Riffle Width ~ 0.9651 0.8191 1.112 Valley Slope (VS) 0.0051 Ift/ft Average Water Surface Slope (S) ; 0.00218 Ifl/ft Sinuosity (VS/S) 1 ~ Stream Length (SL)!~ 0 )feet Valley Length (VL) 1 0-. (feet Sinuosity (SL/VL) 1 ##### ~:~ . .. " ,,. . . 0lfeet Low Bank Height start~ 0lfeet Bank Height Ratio start) ##### Max Riffle startl _____ (LBH) end: 0 feet _ Depth end ~ 0 ~ feet (LBH/Max Rtffle Depth) end 1 ##### o es:t<:~¢A 1\4tn..~ ~~~ µ . ~ t n'" " - s z' ~+ v ~;= Mt '`~" ~'' ' ' ~tmeos~bnless SIo a Rntws;~ ~~: 4 : "c,r .:~, Riffle Slope (Sri ~.002810.002b1(1.1>028~ ti/ft Rfflle Slopc'A~~crage Water Surface Slope (S,;~S) 1.363; 1.303 1.303,; _ _ ~ ter. b.001410.000610.00'S; Ith~t : Run Slope (S,,,~ Run SlopclA~~erage Water Surface Slope (S~,„/S) 0.619; 0.257; 1.138 d 'Pool Slope (S ) 10.002610.000410.(><~~olft/ft /S) 1.170; 0.202; 3.683 Pool Slope'Average Water Surface Slope (S p a~ p c ~ Glick Slope (S~ A 0119 OOOrtpi U3201ft/ft Glide Slope ~.~ erage Water Surface Slope (S/S) 1 54401 0.000114.661 ~~ m V s#. ~~~ ~JA'•~} ~~ '~ a f ~ x5,.4 ".. z~ ' 11 ' t rtF '~ttP'~ a i R'~>x~.;~',. ~' '~.~» ti.,;.~; ~stY"~~~ '~~` •., l p 6 ~ ~ ' ~! ` A ~ Mtn ;; , ;,1;' re ttd otnt r tie ~ . . ~;,; ; , tmenstonle~y I e t s~~} Y.~ .2x ~-' ! . - :: ' " s ~q~ Riffle Depth (d,m;~ 1 7.5801 7.5801 7.5801feet (d,~;(d~ 1 4.1421 4.1421 4.142 Riffle Max Depth/Rifflc hlcan Depth x t'a.. ~ ' ' ' i i i .~ "_~ Run Depth (d„~,„,) 1 4.9401 4.9401 4.9401feet ~; . . 2.699 2.699 2.699 Run Max Depth/Riffle Mean Depth (d,,,~„/d~~ ~ .:. '~ ~ : Pool Depth (d,,,P) ; 0.000; 0.000; O.000lfeet Pool Max Depth/Riffle Mean Depth (d,,,P/db~ 0.000; 0.000; 0.000 ~~ >: ., ~ ,~ . (,lide Depth (d,,,~ ; 0.000; 0 X001 O.000lfeet Glide Ma.e Depth/Riffle Mean Depth (d,,,~/db~ 0.000; 0.00(1; 0 (>n0 '~'1'~ ~- ~~ " ~~r` ~ '~''' ~~r sue`; '~~~ r ~r._ ~ •-i ~~8 ,~~.i`-~`~; b ~ ;: ~ .a "~~,.• t :L+ ~t'~a, Reai;h f Rt[lle-,~ J3ar ~ in~tces ~ Reaeh u;file s~-, YBar ~., , ~ataporie5; t t , ; ~3. t, ,.._ z ~~ ~ ~ D 1(i aa,~ ; mm ~, °o Silt/Clay ti ; ~` m `; a .~ %Sand i~l ~ ll35 ~.~ ;mm ' m ~ %Gravel ~ 1 D50 38.5 ;mm N _ :<. c ° ~ Cobble ~ Q 1 ' DS-} bra , ~mm m L '~ U °o BOll~dCr ~~ ~ ~~)5 ~7 'nl nl ' ~~ ~edr<,~~ o l~lo0 90 ;trtm a.1'he range of "feature" mid-point maximum bankfull depths, including the minimum, maximum and average values. (Pool depths are obtained from the deepest portion of the feature.) b. A composite sample of materials from riffle and pool featutes taken within the designated reach. c. Sample obtained within the "active" bed of a riffle feature at the location of the cross section. © 2005 Wildland Hydrology t r~ 1 1 t [7 1 1 t Silver Creek Main Stem NCD Report RIVERMORPH NATURAL CHANNEL DESIGN REPORT River Name: silver creek Reach Name: Main Stem --Reference Reach-- Silver Creek & Trib Restoration; Reach 1 (Reference Reach) (C 4) --Boundary Conditions-- Drainage Area: Valley slope: Bankfull Discharge: Bankfull Cross sectional Area: Mean Depth Calculation Tolerance: --sediment Data-- Riffle Bed Material ID: Riffle Bed Material D84: Riffle Bed Material D50: Bar Sample ID: Bar sample Dmax: Bar Sample D50: --Entrainment Options-- shields Entrainment Function 8.01 sq mi .0051 ft/ft 461 cfs 103 sq ft 0.2 ft ---------------NCD Results--------------- --Alignment-- Meander wavelength: Channel Length: Sinuosity: Radius of Curvature: Bankfull slope: Meander Belt Width: Meander width Ratio: Deflection Angle: 60.2 mm 38.5 mm 180 mm 27.3 mm 191.8 ft 264.03 ft 1.38 32.3 ft 0.0037 82.8 ft 2.06 0 rad --Riffle cross sectional Properties-- width to Depth Ratio: Entrenchment Ratio: Floodprone width: Bankfull width: Bankfull Mean Depth: Bankfull velocity: Bankfull H draulic Radius: Bankfull shear Stress: Required Roughness (n): Entrainable Particle Size: 15.67 9.66 388.04 ft 40.17 ft 2.56 ft 4.48 ft/s 2.27 ft 0.524 lbs/s ft 0.0349 ft~(1~6) 30.6 mm Page 1 i Silver Creek Main Stem NCD Report --ROSgen Stream classification-- Reference Reach Proposed Reach c 4 C 4 Existing Reach F 4 --Sediment Transport Competency-- i Rat o - Riffle slope / Bankfull slope: 2.14 Ratio - D50bed / D50bar: Critical Dimensionless shear stress (1): 1.410 0618 0 Required Mean Depth (1): . 16.27 ft Ratio - Di bar / D50bed: 4.675 Critical Dimensionless Shear Stress (2): Required Mean Depth (2): 0.0098 2.57 ft Minimum Required Mean Depth: 2.57 ft C~ 1 ti Page 2 t 1 1 i 1 i t 1 1 1 1 1 t 1 ~^~, W 0 V _~ ^~~ W V^J' _W ~_/ L.i~ 1 +~ .~ ^~ ^A W L U /1 0 0 0 M O c~ M O M O N M O O M O N O (O N O '~t N O N N O -i--+ N ~ O ~~ 00 ~ U c°D ~ 0 0 0 N O O O O 0 0 N D d' M N r- O O 07 DO I~ CO CO O O O O O O O O O O O r r r ~- r- ~ (~aa~) uoi~~na~~ ' RIVERMor h Cross Section Detail p - Riffle - ----------------------- Bankfull Elevation: Cross Sectional Area: wetted Perimeter: ' Bankfull width: . Floodprone width: Bankfull Mean Depth. Bankfull Max Depth: ' Et. Bank Tangent Slope: Rt. Bank Tangent Slope: 100.00 ft 103.04 sq ft 43.22 ft 40.17 ft 388.04 ft 2.57 ft 2.74 ft - ft/ft - ft/ft X-Coord Y-Coord ' 0 103.44 173.93 100 173.98 99.15 ' 174.28 98.5 175.07 98.02 176.59 97.68 179.11 97.46 182.84 97.34 188.05 97.28 194.96 201.66 97.26 97.29 206.59 97.35 210.02 97.47 212.21 97.69 213.45 98.02 213.99 98.5 214.12 99.15 ' 214.1 100 388.04 103.44 1 t t 1 1 1 1 1 1 1 1 1 1 1 t 0 0 v O M O O M O ~F~ w` ~ M O N M O Q~ O O w]r1 M O N ~_ p O }~ U N ^ W ~ ~ ^ V J N O N O N ~~ 0 ~ O N ~ `i ~ 00 N 0 U c°fl ~ ~ ~ ~_ ° . 0 ~ ~ _ 0 ~ C c o 0 ° U L N r /'1 V ~ ~ ~ O f~ CO ~ ~' ('7 N r O O O ~ O O O O O O O O O O O O O ~ ~ ~ ~ ~ ~ ~ r L(') ~ O O C'7 O (~aa~.) uoi~~na~~ RIVERMorph Cross Section Detail - Pool - Bankfull Elevation: Cross Sectional Area: wetted Perimeter: Bankfull width: Floodprone width: Bankfull Mean Depth: Bankfull Max Depth: ' Et. Bank Tangent Slope: Rt. Bank Tangent Slope: 1 x-Coord 0 171.47 171.24 170.89 170.91 171.81 174.09 178.24 184.76 194.15 201.68 207.14 210.88 213.27 214.67 215.45 ' 215.96 216.57 388.04 1 t t 100.00 ft 209.03 sq ft 51.86 ft 45.1 ft 388.04 ft 4.63 ft 6.12 ft - ft/ft - ft/ft Y-Coord 106.12 100 98.42 97.16 96.19 95.5 95.07 94.87 94.88 95.08 95.4 95.65 95.91 96.26 96.76 97.5 98.55 100 106.12 t 1 1 1 1 i 1 1 1 1 1 1 E a~ L ».,.,. ~+~'! 1 ~. ~. S,. . «~.. '~ ~. ~~aa~.} u~~~~nal~ r.. r~ 0 u~ t'~ cv 0 a rv 4Cs h. e- r+"°\ G ~ ~. r V C ~n cv a-~ tt7i h- C:Y u7 rt'a N 0 NCD PROFILE - ONE MEANDER WAVELENGTH River: Silver Creek & Trib Restoration Reach: Reach 1 (Reference Reach) ---------------------------------------------------------------------- ' X-Coo rd Y-word 0.00 93.88 32.85 94.94 65.69 96.32 98.54 95.03 131.38 93.39 164.23 94.45 197.07 95.83 229.92 77 262 94.54 92 90 . . iJ a 1 ~I ~,~ u 1 1 1 1 1 1 1 1 1 1 1 1 1 1 t 1 ^^~' W ^_~ P1 1 L -1--+ ^~ rA V L C~ G U C6 ~~/ N ~--+ Q ^~ ^/1 W U a~ (~aa~.) aui~ aa~ua~ uaoa~ ~as~p 0 0 N O O r O ti r O 0 O O M O N r 0 r 0 o_ 0 rn 0 0 ti 0 m 0 0 0 M O N 0 0 ~1 N .~ C •O 0 MEANDER WAVELENGTH River: Silver Reach: Reach Sinuosity: 1.37 Meander wavelength: 191.8 ' Channel Length: 262.83 Meander Belt Width: 82.8 Radius of Curvature: 29.73 Creek & Trib Restoration 1 (Reference Reach) ft ft ft ft ' Circular Curve option Selected ---------------------- Tangent Coordinates: ------------ ------------------------------------ Pt. No. X-Coord Y-Coord 1 22.59 -31.00 2 73.31 31.00 3 118.49 31.00 4 169.21 -31.00 Thalweg coordinates: Pt. No. X-Coord Y-Coord 1 0.00 -41.40 2 0.26 -41.40 3 0.51 -41.40 4 0.77 -41.39 5 1.03 -41.38 ' 6 1.28 -41.37 7 1.54 -41.36 8 1.80 -41.35 9 2.05 -41.33 ' 10 2.31 -41.31 11 2.56 -41.29 ' 12 13 2.82 3.07 -41.27 -41.24 14 3.33 -41.21 15 3.58 -41.18 16 3.84 -41.15 17 4.09 -41.12 18 4.35 -41.08 19 4.60 -41.04 20 4.85 -41.00 21 5.11 -40.96 22 23 5.36 5.61 -40.91 -40.87 24 5.86 -40.82 25 6.11 -40.76 26 6.37 -40.71 ' 27 6.62 -40.65 28 6.87 -40.60 29 7.11 -40.54 30 7.36 -40.47 31 7.61 -40.41 32 7.86 -40.34 33 8.11 -40.27 34 8.35 -40.20 35 8.60 -40.13 36 37 8.84 9.09 -40.05 -39.98 38 9.33 -39.90 39 9.58 -39.82 40 9.82 -39.73 41 10.06 -39.65 42 10.30 -39.56 43 10.54 -39.47 44 10.78 -39.38 45 11.02 -39.28 46 47 11.26 11.50 -39.19 -39.09 48 11.73 -38.99 49 11.97 -38.88 50 12.20 -38.78 51 12.44 -38.67 52 12.67 -38.57 53 12.90 -38.46 54 13.13 -38.34 55 13.36 -38.23 ' S6 57 13.59 13.82 -38.11 -37.99 58 14.04 -37.87 59 14.27 -37.75 60 14.49 -37.63 61 14.72 -37.50 62 14.94 -37.37 63 15.16 -37.24 ' 64 15.38 -37.11 65 15.60 -36.98 66 67 15.82 16.03 -36.84 -36.70 68 16.25 -36.57 69 16.46 -36.42 70 16.68 -36.28 71 16.89 -36.14 72 17.10 -35.99 73 17.31 -35.84 74 17.52 -35.69 75 17.72 -35.54 76 17.93 -35.38 77 18.13 -35.23 78 18.33 -35.07 79 18.54 -34.91 80 18.74 -34.75 81 18.93 -34.59 82 19.13 -34.43 ' 83 84 19.33 19.52 -34.26 -34.09 85 19.71 -33.92 86 19.91 -33.75 87 20.10 -33.58 88 20.28 -33.40 89 20.47 -33.23 90 20.66 -33.05 ' 91 20.84 -32.87 92 93 21.02 21.20 -32.69 -32.51 94 21.38 -32.32 95 21.56 -32.14 96 21.73 -31.95 97 21.91 -31.76 98 22.08 -31.57 99 22.25 -31.38 ' 100 101 22.42 22.59 -31.19 -31.00 102 73.48 31.19 103 73.65 31.38 1 104 73.82 31.57 105 73.99 31.76 106 74.17 31.95 107 74.34 32.14 108 74.52 32.32 109 74.70 32.51 ' 110 111 74.88 75.06 32.69 32.87 112 75.24 33.05 113 75.43 33.23 114 75.62 33.40 115 75.80 33.58 116 75.99 33.75 117 76.19 33.92 ' 118 76.38 34.09 119 76.57 34.26 ' 120 121 76.77 76.97 34.43 34.59 122 77.16 34.75 123 77.36 34.91 124 77.57 35.07 125 77.77 35.23 126 77.97 35.38 127 78.18 35.54 128 78.38 35.69 129 78.59 35.84 130 131 78.80 79.01 35.99 36.14 132 79.22 36.28 133 79.44 36.42 134 79.65 36.57 135 79.87 36.70 136 80.08 36.84 137 80.30 36.98 138 80.52 37.11 139 80.74 37.24 140 80.96 37.37 141 81.18 37.50 142 81.41 37.63 143 81.63 37.75 144 81.86 37.87 145 82.08 37.99 146 82.31 38.11 147 148 82.54 82.77 38.23 38.34 149 83.00 38.46 150 83.23 38.57 151 83.46 38.67 152 83.70 38.78 153 83.93 38.88 154 84.17 38.99 155 84.40 39.09 156 157 84.64 84.88 39.19 39.28 158 85.12 39.38 159 85.36 39.47 160 85.60 39.56 161 85.84 39.65 162 86.08 39.73 163 86.32 39.82 ' 164 165 86.57 86.81 39.90 39.98 166 87.06 40.05 167 87.30 40.13 168 87.55 40.20 169 87.79 40.27 170 88.04 40.34 171 88.29 40.41 172 88.54 40.47 173 88.79 40.54 I 174 175 89.03 89.28 40.60 40.65 176 89.53 40.71 177 89.79 40.76 178 90.04 40.82 179 90.29 40.87 180 90.54 40.91 181 90.79 40.96 ' 182 91.05 41.00 183 91.30 41.04 ' 184 185 91.55 91.81 41.08 41.12 186 92.06 41.15 187 92.32 41.18 188 92.57 41.21 189 92.83 41.24 190 93.08 41.27 191 93.34 41.29 1 192 93.59 41.31 193 93.85 41.33 194 195 94.10 94.36 41.35 41.36 196 94.62 41.37 197 94.87 41.38 198 95.13 41.39 199 95.39 41.40 200 95.64 41.40 201 95.90 41.40 202 96.16 41.40 203 96.41 41.40 204 96.67 41.39 205 96.93 41.38 206 97.18 41.37 207 97.44 41.36 208 97.70 41.35 209 97.95 41.33 210 98.21 41.31 211 212 98.46 98.72 41.29 41.27 213 98.97 41.24 214 99.23 41.21 1 215 99.48 41.18 216 99.74 41.15 217 99.99 41.12 218 100.25 41.08 219 100.50 41.04 220 221 100.75 101.01 41.00 40.96 222 101.26 40.91 223 101.51 40.87 224 101.76 40.82 225 102.01 40.76 226 102.27 40.71 227 102.52 40.65 228 102.77 40.60 ' 229 103.02 40.54 230 103.26 40.47 231 103.51 40.41 232 103.76 40.34 233 104.01 40.27 234 104.25 40.20 235 104.50 40.13 236 104.74 40.05 237 104.99 39.98 238 105.23 39.90 239 105.48 39.82 240 105.72 39.73 241 242 105.96 106.20 39.65 39.56 243 106.44 39.47 244 106.68 39.38 245 106.92 39.28 246 107.16 39.19 247 107.40 39.09 248 107.63 38.99 249 107.87 38.88 250 108.10 38.78 251 108.34 38.67 252 108.57 38.57 253 108.80 38.46 254 109.03 38.34 255 109.26 38.23 256 109.49 38.11 257 109.72 37.99 258 109.94 37.87 259 110.17 37.75 260 110.39 37.63 261 110.62 37.50 262 110.84 37.37 263 111.06 37.24 264 111.28 37.11 265 111.50 36.98 266 111.72 36.84 267 111.93 36.70 268 269 112.15 112.36 36.57 36.42 270 112.58 36.28 271 112.79 36.14 272 113.00 35.99 273 113.21 35.84 274 113.42 35.69 275 113.62 35.54 276 113.83 35.38 277 114.03 35.23 1 278 279 114.23 114.44 35.07 34.91 280 114.64 34.75 281 114.83 34.59 282 115.03 34.43 283 115.23 34.26 284 115.42 34.09 285 115.61 33.92 286 115.81 33.75 287 116.00 33.58 288 116.18 33.40 289 116.37 33.23 290 116.56 33.05 291 116.74 32.87 292 293 116.92 117.10 32.69 32.51 294 117.28 32.32 295 117.46 32.14 ' 296 117.63 31.95 297 117.81 31.76 298 117.98 31.57 299. 118.15 31.38 300 118.32 31.19 301 169.21 -31.00 302 169.38 -31.19 1 303 169.55 -31.38 304 169.72 -31.57 305 169.89 -31.76 i 306 170.07 -31.95 307 170.24 -32.14 308 170.42 -32.32 309 170.60 -32.51 310 170.78 -32.69 311 170.96 -32.87 312 171.14 -33.05 ' 313 171.33 -33.23 314 171.52 -33.40 315 171.70 -33.58 316 171.89 -33.75 317 172.09 -33.92 318 172.28 -34.09 319 172.47 -34.26 320 172.67 -34.43 321 172.87 -34.59 322 323 173.06 173.26 -34.75 -34.91 324 173.47 -35.07 325 173.67 -35.23 326 173.87 -35.38 327 174.08 -35.54 328 174.28 -35.69 329 174.49 -35.84 330 174.70 -35.99 331 174.91 -36.14 332 333 175.12 175.34 -36.28 -36.42 334 175.55 -36.57 335 175.77 -36.70 336 175.98 -36.84 337 176.20 -36.98 338 176.42 -37.11 339 176.64 -37.24 340 176.86 -37.37 341 177.08 -37.50 342 343 177.31 177.53 -37.63 -37.75 344 177.76 -37.87 345 177.98 -37.99 346 178.21 -38.11 347 178.44 -38.23 348 178.67 -38.34 349 178.90 -38.46 350 179.13 -38.57 351 179.36 -38.67 352 179.60 -38.78 353 179.83 -38.88 354 180.07 -38.99 355 180.30 -39.09 356 357 180.54 180.78 -39.19 -39.28 358 181.02 -39.38 359 181.26 -39.47 360 181.50 -39.56 361 181.74 -39.65 362 181.98 -39.73 363 182.22 -39.82 364 182.47 -39.90 365 182.71 -39.98 366 182.96 -40.05 367 183.20 -40.13 368 183.45 -40.20 369 183.69 -40.27 r 370 183.94 -40.34 371 184.19 -40.41 372 184.44 -40.47 373 184.69 -40.54 374 184.93 -40.60 375 185.18 -40.65 376 185.43 -40.71 377 185.69 -40.76 378 185.94 -40.82 379 186.19 -40.87 380 186.44 -40.91 381 186.69 -40.96 382 186.95 -41.00 383 187.20 -41.04 384 187.45 -41.08 385 187.71 -41.12 386 387 187.96 188.22 -41.15 -41.18 388 188.47 -41.21 389 188.73 -41.24 390 188.98 -41.27 391 189.24 -41.29 392 189.49 -41.31 393 189.75 -41.33 394 190.00 -41.35 395 190.26 -41.36 ' 396 397 190.52 190.77 =41.37 -41.38 398 191.03 41.39 399 191.29 -41.40 400 191.54 -41.40 1 1 t Silver Creek BEHI Summary Report RIVERMORPH BANK EROSION HARZARD INDEX (BEHI) River Name: Silver Creek Main Stem Reach Name: Abondoned oxbow - Altered Profile station 12+00 - 15+00 BEHI Name: Riffle Section 12+52.5 survey Date: 02/08/06 Bankfull Height: 3 ft Bank Height: 7.9 ft Root Depth: 1.5 ft Root Density: 5 % Bank Angle: 85 Degrees Surface Protection: 0.1 % Bank Material Adjustment: sand 10 Bank stratification Adjustment: Yes 2 Erosion Loss Curve: Colorado NBS Method #1: Channel Pattern and/or Depositional Features for Adjustments in Near-Bank stress Rating: very High BEHI Numerical Rating: 55.0 BEHI Adjective Rating: Extreme NBS Numerical Rating: 0 NBS Adjective Rating: very High Total Bank Length: 3059 ft Estimated Sediment Loss: 5370.24 Cu Yds per Year ' Estimated sediment Loss: 6981.31 Tons per Year [~ 1 1 Page 1 1 1 o ; a ~ m t w m ~ - N ~~ C O ~u 1" ~~ ~/~y , LL 4 y N i •. C //~~( O lV ~ ' ~ a C m O U a~ N O~ N Y N O a a c O 7 1 V N N .~ O 1 (}~} uoi~enal3 .~" ~. ~,,. ~. }~ ~ ~ ,..~ U~ L C, ~ ~ CC 7 r ~ fir. ~*" O O ~ y ~ O N i ~ ~ C N L ~ O r.+ O ,~ Vi +„~ U C v ~ A ~ a M ~ ~U c~ c N ~ Q a H ~ C/1 s ~ ~ a~ L (J1 U ~ ~- ' ~ ~~ `' o ~ 4, ~' 0 O N ~H O~ L ~ G~ N C O e~ C .~ L O w ~ ~ M `n r L°, +~ N ~ Q ~ ~ ~" err w~ w~ r ~r r w rr r r~ ~r r r r r r r r 1O T O T N O O 1O MT W ~~ O ~~ /~~~ v, W \~ O a a~ i L c~ G A~ W ~~ t _~ L Y N U a~ i _ ~, v ~ m a a • D - • O s i '4 m e a ~ + X 6 L 6 0 0 N O m O N O m O N O O O N 0 N O N O O N W QI O Q! ~~ o m ~, .. .- U1 aI C O N Q~ QI (~ r N_ 0 rn m 0 Oo O N 0 o N (}~} uoi;~nal3 a d t m `m T . T ~--r ' U - N _~ ~_ ~ i 1 n' O C y W U Zf 'a ' ~ c ~\~ W ~ m W ~^\ ~~ LL~ 1~ V' i° s a s ' N C a v c 0 0 v a n ~- V ~_ J O .C 2 1 (}}) uoi~enal3 KIVERMORPH PARTICLE SUMMARY 1 r 1 1 1 1 a River Name: Silver Creek & Trib Restoration Reach Name: Reach 3 (Over Tightened Meander) sample Name: Riffle x-s sta. 18+31 Survey Date: 02/08/06 size (mm) 0 - 0.062 0.062 - 0.125 0.125 - 0.25 0.25 - 0.50 0.50 - 1.0 1.0 - 2.0 ~ 2.0 - 4.0 i 4.0 - 5.7 i 5.7 - 8.0 ~ 8.0 - 11.3 11.3 - 16.0 I 16.0 - 22.6 22.6 - 32.0 32 - 45 45 - 64 64 - 90 90-128 128 - 180 180 - 256 256 - 362 362 - 512 512 - 1024 C 1024 - 2048 C Bedrock C TOT # ITEM % CUM D 0.00 0.00 3 0.00 0.00 ~ 0.00 0.00 ~ 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 20.00 20.00 0.00 20.00 0.00 20.00 i 50.00 70.00 0.00 70.00 0.00 70.00 30.00 100.00 1 0.00 100.00 I 0.00 100.00 ~ 0.00 100.00 0.00 100.00 i 0.00 100.00 ~ 0.00 100.00 0.00 100.00 0.00 100.00 D16 (mm) 10.64 D35 (mm) 25.42 D50 (mm) 28.24 D84 (mm) 76.13 ' D95 (mm) 85.67 D100 (mm) 90 silt/Clay (%) 0 ' Sand (%) 0 Gravel (%) 70 cobble (%) 30 ' Boulder (%) 0 Bedrock (%) 0 Total Particles = 10 (need at least 60). T 1 '~ t p.~ .! ~`~,, - ~ , Y ~ C. .. ~ n f ~' + f } -~~, i . ~,, '~~ ti~ +~ ~ ~~~ ~ yK ~, STA 18+31: Across Channel View of Silver Creek at Riffle Cross-Section 02/09/2006 `,!. JY *~ ^~ ~. .~ y! ~~~," ~, , ~ , ~ .. r: k, tL ~;{~ u Yk~~ ~ Y r' -: ~ L~i~ i ~ ~. ~' fy t fit. H 1 I 1 y q~4 Gx .'&~a ~' a~ ~ ~ U ~ L. y ~ ~ ~ ~ ~ F' ~ ~ ~ O y 7 aON ~ a'C O C N ~ .O O v ~ ~ ~ '~ V] G ~ ~ R! O `n ~ QUA M ~ /~y^ ~"~ FAY ~ ~ H .. ~ -c a ~ ~ L~ U L '~ a~ ~ ~ ~ ~_ a. nn o F v ~' ~ N O O ~ ~ N L L', 0 ~ O a~ ~~ M vi p+p i. ~U F~ w ~a L 7 4. O L V ~ •~ C cet ed ~O t, G~ O ~ ~ O e~ p~~ G" ~ O C N O ~ ~ N ~ I Q F~ LL v v m a a a a ~ d ~ ~ ~ ~ X 0 0 1 1 f 1 ~I .1 ~4 1 ~ m° I 4 ~ 1~ I , f 1 c m S a < ~ a I I 1 a o a .1 7 v O I O , + 1 o r°. Lt7 ~ t t ~ I 4 O ( ~ o 0 } ~1 ~ N I 1 r ~ C 4 I~ o ~ m 1 ° m LL+6luoihaguna 1 -------------------- '4 V o ~ I o ' ~ I 1 0. O 4 1 ~ a 1 o m ~ '1 ~ o~ ~ N -~ 1 1 o C 1 1 ~ ~ I I N V ~ f t C ~ I l N ~ I 1 c 0 ~ 1 I m I 4 ~ Y 4 1 ~ } 1 °m L N U ~ ~I t 4 7 I ~ ~~n/~ 0 ,1 i v/ ~ t t i l 1 ~ °e N 4 1 ~ o ' 1' ,, OI d N I `1 i 4 o° N O LL'i O lfi O 4'1 O LL1 O ~Li O ~ M N O O 61 61 CD m N N N N N N N (}}) not}ena13 r 1 Abandoned oxbow Profile 12+00-15+00 summary Report RIVERMORPH PROFILE SUMMARY River Name: Silver Creek & Trib Restoration Reach Name: Reach 2 (Abondoned oxbow) ' Profile Name: Silver Ck Altered Profile - Station 12+00 to 15+00 survey Date: 02/08/06 ---------------------------------------------------------------------- Survey Data DIST CH Ws BKF P1 P2 P3 P4 1206 12.9 11.91 1219 12.85 11.82 1220.2 13.52 11.83 1220.5 13.78 11.82 1241 13.46 11.57 1246 13.65 11.81 1259 12.82 11.75 1266 12.43 11.75 1292 12.43 11.69 1331 12.22 11.59 1337 13.65 12.59 1358 13.92 12.42 1367 13.11 12.39 1379.5 13.2 12.41 1388 13.22 12.34 1399 13.17 12.32 1403.5 13.3 12.32 1411 13.41 12.3 1421 13.33 12.33 1428 12.98 12.33 1436 12.67 12.32 1443 12.91 12.28 1449 13.58 12.3 1459 13.71 12.3 1470 13.1 12.31 1484 12.98 12.3 ' cross section / Bank Profile Locations Name Type Profile Station ---------------------------------------------------------------------- Run Section 13+77 Run x5 1377 Riffle section 12+52.5 Riffle xs 1252.5 Measurements from Graph Bankfull slope: 0.0 variable Min s riffle 0.00284 s pool 0.00044 s run 0.00056 5 glide 0.00000 P - P 101.07 P length 25.75 r 0218 AVg Max ------ - ----- 0.00284 -------------------- ------- 0.00284 0.00255 0.00803 0.00135 0.00248 0.01186 0.03196 119.13 137.19 31.95 36.05 Page 1 Abandoned oxbow Profile 12+00-15+00 Summary Report Dmax riffle 0.68 0.68 0.68 Dmax pool 1.41 1.63 1.97 Dmax run 0.74 0.91 1.11 Dmax glide 0.84 1.06 1.39 Low Bank Ht 0 0 0 Length and depth measurements in feet, slopes in ft/ft. o RIVERMORPH PROFILE SUMMARY Notes River Name: silver Creek & Trib Restoration ' Reach Name: Reach 2 (Abondoned oxbow) Profile Name: silver Ck Altered Profile - station 12+00 to 15+0 survey Date: 02/08/06 DIST Note 1206 Run 1219 Run 1220.2 Glide 1220.5 Pool 1241 Run 1246 Riffle 1259 Riffle 1266 Run 1292 Run 1331 Run 1337 Glide Abandoned oxbow 1358 Pool Immed. Upstream Debris-Log lam 1367 Run 1379.5 Run 1388 Run 1399 Run 1403.5 Run 1411 Run 1421 Run 1428 Run 1436 Run Submerged Transverse Gravel Bar 1443 Glide 1449 Pool - Glide Transition 1 1459 Pool 1470 Run 1484 Run Page 2 U d j U „-, ~ ~ a o o + N ^ + + f`7 ~ ~ ~ ~ ~ Cfl X ~ 7C m ~ x ~ ~_ ' 0 .` '~"~ U a N O ([5 Q N U L 1 I/n vl ~u t aaui~ ~uaa~ad 0 0 0 0 E a~ a r~i v ~.r~rwr~rn rr-u~ ~ i~..~~ avi~u•~rv~ ~ ~ ---- r ~~ 'J l~ River Name: silver Creek & Trib Restoration Reach Name: Reach 2 (,4bondoned oxbow) Sample Name: Riffle x-S Sta. 12+52.5 Survey Date: 02/09/06 Size (mm) 0 - 0.062 ~ 0.062 - 0.125 ~ 0.125 - 0.25 ~ 0.25 - 0.50 ~ 0.50 - 1.0 I 1.0 - 2.0 ~ 2.0 - 4.0 4.0 - 5.7 I 5.7 - 8.0 8.0 - 11.3 11.3 - 16.0 16.0 - 22.6 22.6 - 32.0 32 - 45 45 - 64 64 - 90 90-128 128 - 180 180 - 256 256 - 362 362 - 512 512 - 1024 1024 - 2048 Bedrock foT # ITEM % CUM 0.00 0.00 0.00 0.00 0.00 0.00 > 20.00 0.00 20.00 0.00 3 30.00 20.00 L 10.00 0.00 0.00 0.00 0.00 1 0.00 1 0.00 I 0.00 I 0.00 I 0.00 ~ 0.00 ~ 0.00 D16 (mm) 3.6 D35 (mm) 7.42 D50 (mm) 12.87 D84 (mm) 20.62 D95 (mm) 27.3 D100 (mm) 32 Silt/Clay (%) 0 Sand (%) 0 Gravel (%) 100 Cobble (%) 0 Boulder (%) 0 Bedrock (%) 0 Total Particles = 10 (need at least 60). 1 t 0.00 0.00 0.00 0.00 0.00 0.00 20.00 20.00 40.00 40.00 70.00 90.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 1 1\1 v Lt\I•IV 1\f ~ ~ r/'1 ~~ ~ 1L.LL Jl.l l•II •IH f~ I 1 r River Name: Silver Creek & Trib Restoration Reach Name: Reach 2 (Abondoned oxbow) Sample Name: Run x-S Sta. 13+77 Survey Date: 02/09/06 Size (mm) TOT # ITEM % CUM --------- --------- 0 - 0.062 - ------- --- 0 ----------- 0.00 --------------------------- 0.00 0.062 - 0.125 0.125 - 0.25 0 0 0.00 0.00 0.00 0.00 0.25 - 0.50 0 0.00 0.00 0.50 - 1.0 1 10.00 10.00 ' 1.0 - 2.0 2 20.00 30.00 2.0 - 4.0 3 30.00 60.00 4.0 - 5.7 4 40.00 100.00 S.7 - 8.0 0 0.00 100.00 ' 8.0 - 11.3 0 0.00 100.00 11.3 - 16.0 0 0.00 100.00 ' 16.0 - 22.6 22.6 - 32.0 0 0 0.00 0.00 100.00 100.00 32 - 45 0 0.00 100.00 45 - 64 0 0.00 100.00 64 - 90 0 0.00 100.00 90 - 128 0 0.00 100.00 128 - 180 0 0.00 100.00 180 - 256 0 0.00 100.00 256 362 0 0.00 100.00 _ 362 512 0 0.00 100.00 512 - 1024 1024 - 2048 0 0 0.00 0.00 100.00 100.00 Bedrock 0 0.00 100.00 D16 (mm) 1.3 D35 (mm) 2.33 D50 (mm) 3.33 D84 (mm) 5.02 D95 (mm) 5.49 D100 (mm) 5.7 Silt/Clay (%) 0 Sand (%) 30 Gravel (%) 70 Cobble (%) 0 Boulder (°°) 0 ' Bedrock (%) 0 Total Particles = 10 (need at least 60). 1 t r~ivr.nrivnrn rrrnii~.~c .~vi•u•ir~n~ t v 1 1 1 a River Name: Silver Creek & Trib Restoration Reach Name: Reach 2 (Abondoned oxbow) Sample Name: Riffle x-S Sta. 15+00 Survey Date: 02/09/06 Size (mm) 0 - 0.062 0.062 - 0.125 0.125 - 0.25 ~ 0.25 - 0.50 i 0.50 - 1.0 i 1.0 - 2.0 I 2.0 - 4.0 I 4.0 - 5.7 I 5.7 - 8.0 I 8.0 - 11.3 I 11.3 - 16.0 16.0 - 22.6 22.6 - 32.0 32 - 45 45 - 64 64 - 90 90-128 12 8 - 180 180 - 256 256 - 362 362 - 512 512 - 1024 1024 - 2048 C Bedrock C TOT # ITEM % CUM ~ 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 L 10.00 10.00 L 10.00 20.00 ' 20.00 40.00 ' 20.00 60.00 s 30.00 90.00 10.00 100.00 0.00 100.00 I 0.00 100.00 I 0.00 100.00 ~ 0.00 100.00 0.00 100.00 i 0.00 100.00 i 0.00 100.00 ~ 0.00 100.00 D16 (mm) 19.96 D35 (mm) 29.65 D50 (mm) 38.5 D84 (mm) 60.2 ' D95 (mm) 77 D100 (mm) 90 silt/Clay (%) 0 sand (%) 0 Gravel (%) 90 cobble (%) 10 Boulder (%) 0 ' Bedrock (%) 0 Total Particles = 10 (need at least 60). 1 a o T N C_ Y ~ a a a d u t d r~ r~ T 0 r~ U ~ N , ~ ~ s ~ a N ~ O f6 v c c N, m o. ~~ 0 ~~ Q b 4. Y a 3 ., a c 0 c r (}}) uoi~enal3 0 0 W O o v C N_ 0 C ~ N .o V ~~.. ,. i ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ .,~„ •~;;'r .. i, t', -~~, - _e~a: ~ _ ~1 i .-*k.; ~: ,~ -,ci ~ ~ ~ o ~, . U u a~ ~ ~ _. ~ ~ L `o U a `~ ao ~, c 0 ~Oo ~~ a o ~ '~ + ~ M ~ ~ ~ ~ Q F t/1 a~ ~ ~ U L U 6~ U i C/] ~ 4. O ~U ~ ~o >ao N O i ~ N ~ ~ O ~~ O G~ A C O ~ ~ ~ ~ + ~ M ~ .-r Q f"i cC "\ `~ yy r`~F ~+~ f 41 4 ~ ~ y 4 X15 ~ \ °(~ :.. a 0 L y ~ V ..~ ~ V] 4. y O O ~U a ~~ ~ 3g a ~ , ~ N ~ 0 ~ ~ O v Q ~ -F~ ~ M Q ~ r..~ Q ~ ~ ~ ~ L U ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ i ~ l~ t• ~ r• ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ Abandoned oxbow Riff Section '12+52.5 d Ground Points ~ Bankfull Indicators Water Surtace Points Wbkf m 35.7 nnk~ c ~ o _~._ .__ _ 11 11 11 .-. ~_ 11 C O ~ 11 W 11 11 11 11: 11: -- ~~ ~~ nu lu 80 90 100 Horizontal Distance {ft} ~ ~ ~ c :..•~syr - .r,r v", "9 +rM,pn„y~,y:, ~•r » ~ '~ ,~. ~~;. , ~ r .~ , _,,,, ~ ~~~~~~ 4 • . ~,~ STA 12+52.5: ~e Across Channel View of Silver i~, w~ - „ ~ ., t 5~~' ~. ~+r~„~,. - ~ K ` ` ''', ,ti ,'~*' 4 ~' : ~ F~, '' ~A, w r ~` ~ ,~ ~ rrt ~[ i ` "'~.~I- ~ ~ ~ + - k Creek at Abandoned Oxbow Riffle V ~ •~. , ~ ? ,~ ~ ~ , "' ~r° .t~~ ~~~A~ ~ • , r,~ ~ _~ ~ f-; ~ '' Y F' + ~ •, ~ ~ ~, ,,,, ,~ ,~ ., . "_ ~ ~ ' • Cross-Section 02/08/2006 , , ~ d,4 ~ ~ ' "~ . ~ `~ ~ . - )e ~ ~ 1 ~ " ` .• Yw?l ~ y ~ . , 4 _d, Cry, ~ "[" r r :,+, ~. , d i '~ - ~ li~ ^r ~B ~ " ""' ~ i" i ~ . ;~ _• .~ ~" ; ' - ~ ~ y i ~ '~ ^ Ct ~ «„ ",~ ~ .. ~, R N ; ° 1* 4 ^ ' .,H ~ ,•... ,,. M f ~ , y FU ¢ ~ l~~ ' .. ~ ~,~!F0E • i °" 4~ ~,i 4. ~+ „b ,.~ ;y c .. ,... .. .. ' :~~ % ,''~ Lyr ~`^`~l ,d: ,V~ . ~i?`M n. ~~~ i~9' "~y f~ •~~~~~~~ I ~r 1," ~~ , ~~~ ~, ,'y ~ ~ , ~,~.,.i~ • ~. ,~,~' ~~.' ~ v ~ • _ ,~. e~. :~ a~ ~ °' o ~, U a ~ ~, v"~ o y.. L o (~ °' J~ o W N ~ ~ O ri, '~ O rn O CL ~ ~ G! ~ O N .~ N ~ ~--~ ~ Q F ~ r ~ ~ ~ ~ ~ ^~ ~ ~ ~~: z. c ,r ".~' ~ ,~ ~;. i~ .Y 3 p' d L ~+ U .° r%~ o s°. aU a~ w ~w~ ~p~o N sue. O p ~ ~ O 0 Q ~ C ijj O 1(N) ~ C~ -I- ~ N ~ Q e+~'C N ~ ~ ~ ~ r ~ ~ ~ ~ r ~ ~ ~ ~ ~ r i ~ r RIVERMORPH BANK EROSION HARZARD INDEX (BEHI) ' River Name: Silver Creek & Trib Restoration Reach Name: Reach 5 (unnamed Tributary) BEHI Name: Unnamed Tributary Survey Date: 01/14/06 ' Bankfull Height: 0.5 ft Bank Height: 5 ft Root Depth: 1.5 ft ' Root Density: 5 Bank Angle: 85 Degrees surface Protection: 0 Bank Material Adjustment: Sand 10 Bank Stratification Adjustment: Yes 5 Erosion Loss Curve: Yellowstone NBS Method #7: vertical velocity Near-Bank Shear. Stress Method ' velocity at surface: 4.2 fps velocity at Bed: 3 fps Depth: 0.5 ft Hydraulic Radius: 0.18 ft Bankfull slope: .04 Shear stress: 0.45 lb/sq/ft NB Shear Stress: 11.17 lb/sq/ft Shear Ratio: 24.87 ' BEHI Numerical Rating: 57.7 BEHI Adjective Rating: Extreme NBS Numerical Rating: 24.87 NBS Adjective Rating: Extreme Total Bank Length: 1200 ft Estimated sediment Loss: 288.89 Cu Yds per Year Estimated Sediment Loss: 375.56 Tons per Year 1 1 t r i t ~~ ~V~r ~~t?'EK LI s, (1 Gt11'1 2-t~ ~rrr b ~.:'~0.rc,i Worksheet for Trapezoidal Channel - 1 J Project'. Description Flow Element: Trapezoidal Channel Friction Method: Manning Formula Solve For: Discharge Input Data Roughness Coe~cient: 0.040 Channel Slope: 0.04000 ft/ft Normal Depth: 0.50 ft Left Side Slope: 2.00 ft!ft (H:V) Right Side Slope: 2.00 ft/ft (H:V) Bottom Width: 6.00 ft Results Discharge: 14.70 ft'/s Flow Area: 3.50 ftZ Wetted Perimeter: 8.24 ft Top Width: 8.00 ft Critical Depth: 0.54 ft Critical Slope: 0.03133 ft/ft Velocity: 4.20 ft/s Velocity Head: 0.27 ft Specific Energy: 0.77 ft Froude Number: 1.12 Flow Type: Supercritical GVF Input Data Downstream Depth: 0.50 ft Length: 1210.00 ft Number Of Steps: 24 GVF Output Data Upstream Depth: 0.54 ft Profile Description: S2 Headloss: 48.44 ft Downstream Velocity: 4.20 ft/s Upstream Velocity: 3.87 ft/s Normal Depth: 0.50 ft Critical Depth: 0.54 ft Channel Slope: 0.04000 ft/ft Worksheet for Trapezoidal Channel - 1 Critical Slope: 0.03133 ft/ft C1 1 i C~ 1 r t 1 • 1 r r 1 t Gradually Varied Flow Points for Trapezoidal Channel - 1 Project Description Flow Element: Trapezoidal Channel Input Data Downstream Depth: 0.50 ft Upstream Depth: 0.54 ft Length: 1533.00 ft Number Of Steps: 24 Results Profile Description: S2 Headloss: 61.36 ft Downstream Velocity: 4.20 ft/s Upstream Velocity: 3.87 ft/s Channel Slope: 0.04000 ft/ft Discharge: 14.70 ft'/s Normal Depth: 0.50 ft Critical Depth: 0.54 ft Distance Depth Invert Elevation Flow Area Wetted Perimeter Velocity Specific Energy 0.00 0.50 0.00 3.50 8.24 4.20 0.77 1529.1'.9 0.50 61.17- 3.50 '8.24 4.26. 0.77 1530.99 0.50 61.24 3.51 8.24 4.18 0.77 1531'.56 0.50 61.26 3.52 8.25' 4.17 0.77 1531.89 0.50 61.28 3.54 8.26 4.16 0.77 1532.12 ' 0.51 61.28 3.55 8.26 4:14 0.77 1532.28 0.51 61.29 3.56 8.27 4.13 0.77 1532:41 0.51 61.30 3.57 8.28 4.11 0.77- 1532.52 0.51 61.30 3.59 8.28 4. t 0 0.77 1532.60 0.51 ' 61.30 3.60 8.29 4.09. 0.77 1532.67 0.51 61.31 3.61 8.30 4.07 0.77 1532.73. 0.52 61.31 3.62 8.30 4.06 0.77. 1532.78 0.52 61.31 3.63 8.31 4.04 0.77 1532.82 0.52 61:31 3.65 8.32 4.03 0.77 1532.86 0.52 61.31 3.66 8.32 4.02 0.77 4532:89 0:52 61:32 3.67 8.33 4:00 -0.77 1532.91 0.52 61.32 3.68 8.34 3.99 0.77 4532.93 0.52 61.32 3:70: 8.34 3.98 0.77 1532.95 0.53 61.32 3.71 8.35 3.96 0.77 1532.96 .0.53 61.32 3.72 8.36 3.95 0.77 1532.98 0.53 61.32 3.73 8.37 3.94 0.77 1 Gradually Varied Flow Points for Trapezoidal Channel - 1 Distance Depth Invert Elevation Flow Area Wetted Perimeter Velocity Specific Energy 1532.98 0.53 61.32 3.75 8.37 3.92 0.77 1532.99 0.53 61.32 3.76 8.38 3.91 0.77 1533.00 0.53 61.32 3.77 8.39 3.90 0.77 1533.00 0.53 61.32 3.78 8.39 3.89 0.77 1533.00 0.54 61.32 3.51 8.24 4.18 0.81 i 1 1 i r 1 t O O O O 00 O n O [O n ~ V C l~ •.+ N O c a o N .~ O 2 0 v (}}) uoi~enal3 r 1 t • 1 1 RM Step-Pool Calcs RIVERMORPH VANE DESIGN REPORT River Name: Silver Creek Reach Name: Reach 2 (unnamed Tributary) vane Name: Cross-vane Step-Pool Desiign Input Data Bank Height: Bankfull Height: shear Stress: Near Bank stress: Bankfull Slope: Bankfull width: Radius of curvature: Plan view vane Angle: Results Ratio - Rc/wbkf: vane Spacing: vane Length: Minimum Rock Size (Diameter): Protrusion Height: Footing Depth: Layers of Footing Stones: vane Slope: 0.5 ft 0.5 ft 0.4 lbs/sq ft 1.5 lbs/sq ft 0.04 ft/ft 8 ft 600 ft 20 deg 75 50.0 ft 36.5 ft 2.0 ft 0.05 ft 0.15 ft 1 1.4 % Page 1 ~ ~ ~ `~ ~~~•~ S Vim. _~~ "# M~~ a~ ,` "~~ 'l +~IS. ,~< ?.' -~`J¢.:. ,.'x c a^` w. Y i ~6. ~ ~ `-~ ~ y ~ rr4 ..~#!~ 6 ~F~ J n~~~ ~f ~.~ ,~ rti ~~~ ~i ` ~ 7~ ~ ~ ~~p/ y yy y y ~ 'H ~+ yw a ,~ ,~ ~~~,~ .~ ~ +3, ~ fir. ~ .~4 y~ .~,an,.~~ ~ ~ I ~ ~~ , ~ . , ;'~ 91~,, .v .r ~ ~ STA 1+15: Upstream View of Unnamed Tributary at Riffle Cross-Section near Bottom of Reach 01/14/06 C~: "°~r'~1`1''~"si ~'C:k~~`¢~ ~11,~."' ^^'„~ic"~~'~1H i~Y~~~y~yY"R ; ~~.~m,-~y. `,«a~ ~' r `~' .,.vex ~' ~ - .R "t +a'j 1'~' "• +13' ~ ~ ~'' ~ sr; ~~ e r° .,~ ~ ~ ~ t -~. ~, R~.;~, , STA 1+15: Downstream View of Unnamed Tributary at Riffle Cross-Section near Bottom of Ruch O1/l4/06 P?.. ' K STA 1+15: Across Channel View of Unnamed Tributary at Riffle Cross-Section near Bottom of Reach 01/14/06 ~" ' ECOSYSTEM ENHANCEMENT PROGRAM Restoration Plan -Silver Creek and Unnamed Tributary EEP Contract # D05016-1 APPENDIX 4 Unnamed Tributary to Silver Creek Photographs a 1 1 9bb6-SOOZ :~y qor I dt~W NOilb'~O~ OlOHd ~i332i~ 2i~n~IS Ol .lbb'1f181~11 a~WdNNfI ,006 = „6 ~aleaS l it XION~ddb' Nb~~d NOIlb21O1S3~1 ~i33~i~ 2~3n~IS 9002 `~eW :aleQ I `dNl~02i`d~ HlaON `.11Nf10~ 3~i2if18 w ~ w 008V'SLL'419:XO~ OOS4'SLL'Vl9:auoyd hS0£h HO 'sngwn!o0 •poob l~uoq~y rnaN OOSS s}s!}uaias • s~auup~d . s~o%an~ns • s~aau!6u3 'au! 'uo}!!i'8 uo}a~qulpH '}aornyaay~ 'suon3 / -.~ / i / ___. ~ \ ~ / / / V L v yC7 ~ ~.S~o 1. 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A ~ h ~ d 4 ~ ~ S ~'u Ft~x.e .A ~, • ~~'@1uL~ ~. ~"-..idm.Nt ~d~.'`. . .e~r-.d. ~' .n i... A ~ u~¢~°. .~,52'~.... 'if.'; >ff .%, aE'3?.d.~~. ~'~~„s. n ,~ 3a~._s k'.t _ € u ~ .:a 1. Adjacent pastureland on Queen property, along west side of Unnamed Tributary to Silver Creek. ~~ 1 e G O ~" O y ~n ~. y y U a5 iL". _y 'r y 0 b1~ ~' ,--~ .~ E-'~ J rh -~-~ it U U G ~~'. O O O ^, y ~. ti .~ U .ti G r rl 3. Deficient riparian corridor along Uimamed Tributary to Silver Creek. Cattle intrusion is evident here. ~~ :.: .1,,,,~ _} :§'~, .~ 9" ~„M.. 2 ~ Y y. ~, -~' 5~ S M~ ua J < :~ fie:.:' 3 ~~~~ ~~ b~.V « 'f 1, s d , ~.swv'"+ Nd ' $ .. ~. ~. 4. Area of cattle intnision and sparsely vegetated riparian corridor at downstream portion of Uimamed Tributra project corridor. .. \. ,F_..._~.._ _ ..._... .., .. _. r aSw ~ ~ ~~,g~~~ '~ ~ ~ __ ,. S T ~'f ~, .:~ ~ 1 ,k ..• Y~ fi ~ ~.. 6 t ~ ~ f ~ n +. .. „~ :. .w.6 - ~' ~ x . rt ..rrr.'^. !w sass `" + rata '~. TT _ 'i' ~"wud~f' 9 ~_R ~. .. .1 yx ~ s~ A y ~~ ~ '~' ~ v 'b ~ ~ ~ jy f ~i..4 4GG~ ~~i .tt ~ 14 .... -~~ ~ • Sm~ys - p. p ~ 4.~ s ~ n~' ^ ".~ ., ar cif ,r ~~ %'~ ! i 'y: W~ /, '~Pe 2" ~• ~ ~'., ;. '~~ ~x ~ ,+~..,..~" t `~i'" 5 ~ ~ v ~ L~"' -1:.. ~ a'~ Y t_' .5t h~- Asa' 4 - • A ~F' ': - ~ .v 5. Evidence of extreme cattle intnision and bank failure attributed to hoof shear along Unnamed Tributary at bottom of reach. 6. Pastureland is present to the west of the Uimamed Tributary, and a sparsely wooded con-idor is present to the east (downstream portion of project corridor). ~, ,. ~ `~,~ • X 4 3a ~,g ~~' ~'~sw . ~ ,~ , `~; ~~~ % y Ofs:F a 7. Undercut banks along east bank of Uimamed Tributary. ~. Undercutting of banks along Unnamed Tributary is resulting in loss of trees in some areas. 1 I i~ i~ i~ 9. Unnamed Tributary, facing upstream. 10. Unnamed Tributary, facing upstream. The chamlel is laterally contained within a valley-confined ravine in this area. 11. Slumping bank along Unnamed Tributary attributed to hoof shear from cattle intrusion. 12. Umiamed Tributary, facing downstream at the approximate midpoint of the project eon-idor. _ ; g .. n~ ; ~~ 13. A dead cow was observed in the stream where denuded banks are steeper. This reinforces the need for cattle exclusion fencing along the stream to prevent damage to banks and channel, as well as loss of cattle. 14. Fallen tree within Linnamed Tributary. ~ 1 ~ ~ } e t ~ j f ~ , . ~ ~ ~ ~Y. .,.. ~ ~ f da ~'~' `.tl, n. r .a ,- S ~. 4 r ~ ,~h~ ~ ~~ { ~ ~ ~ ,~ .,~ .. Ja ar sx~g. 4 1 .. .~ ~ . ' ~ ~ ~ r~~ ~~ ''/ ...0.f ~: ', :, ~ ~;j ..'Y_ ~ i i+ ~ s O. ~h - ~4 ~ . r ~ ~+ ~ L ' ~ FA r l .$f~" "' `. . } 1. t,,'~~ , q~ < '~~£ w ,.a .sA ... / _. sYt'~'!ig ,, ~, myi ~t ~ ; V~ " ~ ~4 ~. ~ ~5.,. ~.. .j~ ~ ~ g L ~' r`Y ~~ 4"? ~ ~d ^ ~ yy s f" ~'''~ 15, Cattle intnision was also noted along the upstream portion of the Uiutamed Tributary in an area where the valley broadens, causing extreme degradation of the bed and banks and denuding of vegetation. ,~ _ ~ ~ ~ b t ~_~ t x r ~t - ~f ~ a- ~ ._ a .er. `~~ ~ ` ,•. ` e ~ - . .- ` ~ -, 1 ( ~ 5 I Y c ~ t(( 'gy gg r ~ ., b ~~ " .,~'. ~ ~ m' ~. .. r ~ r~'. : ~~~ y e `~, ~' F ~ ~ I . 4 ~4 ~ ` Y ~ ~ rv ~ ~ , l~~ q~ C 'R } F '4 mow, ~ y 'y.~' ~ ~ 1 F ,~, tppp ~'k^~ 7 ~ L ' A`.+' ~~ ~- s ~ a .4. ~ ~' F T~vD .«~ ~ ,~ ~ + ~ ~M Fyn Lg y a ~ +g k _ ,,.y .... ~ p ~ ~'Y s~~y, .;in. ~ sw"~~dCl' ~ f'MPa~y~Pn~~N~~S~w`~ ±p,~~ r~ Y ~ a ~ - C 1 $ rty,, f ; ~ i .. ~ ~ Wi~1~1 .,~Y ~~ ~ ~ ~~~}[` s ~t t" ~ • _'_ ee r ~..~,a .~1f ~ ~,n~py~a 3 ~ s_.~,5~t~ ~ ~ ~~ ~~. _, yK ~~ns ~lwt *. ~ ~ l~r~„„y"CS Yp .~~., ASS w. _ 16. Cattle inri-usion and eroding banks along upstream portion of Unnamed Tributary. _ 1 ~ q 1 F -y ~ `~ ~ r,. ~ ~ ~ i ~ ~ ~ ~ ~ ~ `v~r wq d .t ii t ~ Y A f .'f `T S r'(~~t ~ T f ..- dr .. ~ ~ ' ~~ ~/ h ~ /~. P ~ ~ 4 }~~ j _~` g 1^' "~ ~./ ¢ y~`}~~,y°" AAA; ~ ~g @ 4 ' Y.y'w[' . } %'~~'r~'. f , s - Y ~M.. t A~ r : ~ ry ~.p +. 3 ~~AyiXr k ~•(' ~ tf t ~ s ~ ~ ~~_Y.'~ ^J . ~ ~~}. M N µp ~ R ~ r f`9~+w~ -n. s. ~.+^ S l~~ A z e] x ,...t~ 4 fr'lr~ -Y ` ,~ i .~( - ~ 17. Upstream project terminus along Unnamed Tributary. Stream emerges from a granite bedrock spring within a steep ravine. ECOSYSTEM ENHANCEMENT PROGRAM Restoration Plan -Silver Creek and Unnamed Tributary EEP Contract # D05016-1 n APPENDIX 5 Reference Reach Classification, Photographs and Data Summary Reports 1 D t i1 I 1 Stream Classification Form Stream Channel Classification (Level II) ... Stream NAME: Silver Creek & Trib Restoration, Reach -Reach 1 (Reference Reach) Basin NAME: L"1~¢~'A.~/$/.~ ~QI V+/i~ il~ Drainage AREA: 742.4 acre 1.16 mi' Location: ~~ l ND ~ ~ C~E~~G ,1 ~,C~/Z3i'if~2-y 'TCJ ~J L/EfL G,,eE"E/L. , &!l2+~~ CII,~ f~L. Twp: Rge: Sec: Qtr: Lat: 35.6186 Long: 81.817 Observers: MI1L~S ~ ~fEl~t~ r7~' Qr W/al?2E~ ~ ~tifC3T~S~r~ ry Date: 1/13/2006 Bankfull WIDTH (Wbkf) 24.02 Feet WIDTH of the stream channel, at bankfull stage elevation, in a riffle section. ;' Mean DEPTH (dbkf) 1.28 Feet Mean DE/PTH of the stream channel cross-section, at bankfull stage elevation, in a riffle section. (dbkt-AbkP Wbkf) Bankfull Cross Section Area (Abkf) 30.77 Feet2 AREA of the stream channel cross-section, at bankfull stage elevation, in a riffle section. WIDTH /DEPTH RATIO (Wbkf /dbkf) 18.77 Ft/Ft Bankfull WIDTH divided by bankfull mean DEPTH, in a riffle section. Maximum DEPTH (d,,,rtf) 1.72 Feet Maximum depth of the bankfull channel cross-section, or elevation between the bankfull stage and thalweg in a riffle section. Flood-Prone Area WIDTH (WfP~ 232 Feet The stage/elevation at which flo`od-prone area WIDTH is determined in a riffle section at twice maximum DEPTH, or (2 x dmri9 Entrenchment RATIO (ER) 9.66 Ft/Ft The ratio of flood-prone area WIDTH divided by bankfull channel WIDTH (WfP~Wbk~ in a riffle section. Channel Materials (Particle Size Index) D50 38.5 mm The 50th percentile, or less than, from a pebble count frequency distribution of channel particles representing the median or dominant particle size. Water Surface SLOPE (S) 0.01149 FUFt Average water surface slope as measured between the same position of bed features in the profile over two meander wave lengths. This is similar to average bankfull slope. Channel SINUOSITY (K) 1.2 Sinuosity: an index of channel pattern, determined from stream length /valley length, i.e. (SL/VL); or estimated from a ratio of valley slope divided by channel slope (VS/ S). Stream Type C 4 For Reference, see page 5-5, 5-6: Rosgen, 1996. Applied River Morphology. © 2005 Wildland Hydrology 0 Reference Reach Summary Data Form ... and Reference Reach Summary Data Mean Riffle Depth (dbk~ 1.28;feet Mean Riffle Width (Wt,t;~ :' 24.02;feet Mean Riffle Area (At,k~ 30.77;feet? ~ Mean Pool Depth (dt,kfp) 2.33;feet Mean Pool Width W ( bkeP) 26.971feet ' Mean Pool Area (A ) ~ 62 771f ~ o bkfP . eet c ~ Ratio Mean Pool ;dbkfr/ . 1.82of Ratio Pool Width/Riffle ;Wt,kf~/ 1 123; Ratio Pool Area/ 1A ~/ bkf 2 040 Q Depth/Mean Riffle Depth d , , bkf . Width 1 1 Wbkf 1 . 1 Rlffle Area 1 i`~bkf c Max Riffle Depth (dm,;~ 2.41;feet Max Pool Depth (dm~°t) 3.76;feet Max riffle depth/Mean riffle depth; 1.883 c r Max pool depth/Mean riffle depth; 2.98 Point Bar Slope 0 U Streamflow: Estimated Mean Velocity at Bankfull Stage (ubt~ 1 3.191ftls Estimation Method 1 Streamflow: Estimated Discharge at Bankfull Stage (Qt,k~ I 98.16~cfs Drainage Area 1 1.161mi~ ' ' Geomet Ave Min Max Dimensionless Geomet Ratios Ave Min Maas ~ Meander Length (Lm) 1 104.81 88.231 115.71feet ~ ~ Meander Len th Ratio Lm/W . 361 ~ 3 ) ~ 4 673 g ( bk 4 816 ~ ~ , . . ~ . t d ' Radius of Curvature (Rc) 17.67 12.97 24.44jfeet Radius of Curvature/Riffle Width (Rc/W ~ ~ 0 736; 0 540; 1 017 t,k . . . c Belt Width (Wt,tr) ; 45.22; 44.17; 46.S;feet Meander Width Ratio (Wbtt/Wt,k~ ; 1.883; 1.839; 1.936 U Individual Pool Length 1 17.421 11.011 31.561feet Pool Length/Riffle Width 1 0.7251 0.4581 1.314 Pool to Pool Spacing 1 71.361 67.61 77.Slfeet Pool to Pool Spacing/Riffle Width 1 2.9711 2.8141 3.226 Valley Slope (VS) 0.0097 ;ftlft Average Water Surface Slope (S) 0.01149 ;ft/ft Sinuosity (VS/S) 1.2 Stream Length (SL)1 0 lfeet Valley Length (VL) 1 0 lfeet Sinuosity (SLNL) 1 ##### Low Bank Height start; ____Olfeet '_ Max Riffle start 0lfeet ------; Bank Height Ratio start ##### , (LBH end; 01 feet r Depth end 1 01 feet ;-~ (LBH/Max Riffle De th P ) endl#####1 ------' Facef Slo yes Ave Min Max Dimensionless Slo a Ratios Ave Min Max Riffle Slope (5,;~ 10.02460917210 0346~fUft Riffle Slope/Average Water Surface Slope (S~~S) ~ 2 144 1 S00' 3 008 a~ o Run Slope (5,~~) ~092I 1;O.O1Z5~0 062;ft/ft Rmt Slope/Average Water Surface Slope (S „~/S) ~ L 8381 1 048' 3 150 ~ Pool Slope (Sp) ;0.0043;0.0010;0 0095; ft/ft Pool Slope/Average Water Surface Slope (S /S) 1 0 37~ ~ 0 0861 0 Soo;^~ N i, ~ c Glide Slope (S~) 10.005310.0020;0 0075;ft/ft Glide Slope/Average Water Surface Slope (S~S) 0 460' 0 17~' 0 6551 U Feature iKid oint a Ave Min Mat Dimensionless Depth Ratios Ave Min Mar Riffle Depth (d~,,;~ .2.4101 2.4101 2.410~feet Riffle Max Depth/Riffle Mean Depth (d ,,.,(dnkF) 1 $831 1 883' 1 383' Run Depth (dnv„~) ~ 2.300 1.870 2 560~feet Run Max Depth/Riffle Mean Depth (dmn,,,/decd 1 1 797 1 4611 2 000 Pool Depth (dmp) 3.760; 3.760; 3.760; feet Pool Max Depth/Riffle Mean Depth (d /der l 2 938; 2 938; 2 938; m~ i Glide Depth (dm~ 2.470; 1.640; 3 280;feet Glide Max Depth/Riffle Mean Depth (dm~d~~f) 1 1 930; 1 2811 ~ 563; Catagories Reachb Riffle° Bar Indices $eachb Rifle` Bar ~, - %SilbClay 0 0 DI6 0 0 1,~ ~ co , .,, -„ ~~ , 0 0 % Sand 0 0 j D35 ,mm m ~ ' % Gravel 0 0 D50 27.73 38.5 1mm ~ Cobble 0 0 , D84 58.3 60.2 , L U , %Boulder 0 0 F D95 0 0 1mm %Bedrock 0 0 t D100. 0 0 , _-_ ____o_ .._ __ ........ ...... r.,.......,..,.,.,,.,,, „u„,~,,,,, ..~t,u,,, muuumg me minimum, maximum ana average values. (Pool depths are obtained from the deepest portion of the feature.) b. A composite sample of materials from riffle and pool featutes taken within the designated reach. c. Sample obtained within the "active" bed of a riffle feature at the location of the cross section. © 2005 Wildland Hydrology - __ _ _ v 1 RIVERMORPH REACH SUMMARY River Name: Silver Creek & Trib Restoration Reach Name: Reach 1 (Reference Reach) Stream Type valley Type D50(mm) C 4 VIII 38.5 Val Slope BKF Q(cfs) DA(sq mi) 0.0097 98.16 1.16 Dimension Summary Database based on the following Cross Sections: Riffle Section 0+22 Pool Section 3+20 Variable Min Avg Max Floodprone width (ft) 232.0 232.0 232.0 Riffle Area (Sq ft) 30.77 30.77 30.77 Max Riffle Depth (ft) 2.41 2.41 2.41 Mean Riffle Depth (ft) 1.28 1.28 1.28 Riffle width (ft) 24.02 24.02 24.02 Pool Area (Sq ft) 62.77 62.77 62.77 Max Pool Depth (ft) 3.76 3.76 3.76 Mean Pool Depth (ft) 2.33 2.33 2.33 Pool width (ft) 26.97 26.97 26.97 Run Area (Sq ft) 0 0 0 Max Run Depth (ft) 1.87 2.3 2.56 ' Mean Run Depth (ft) 0 0 0 Run width (ft) 0 0 0 Glide Area (Sq ft) 0 0 0 i Max Glide Depth (ft) 1.64 2.47 3.28 ^ Mean Glide Depth (ft) 0 0 0 G1 i de width (ft) 0 0 0 Pattern Summary 1 variable----------------------- ----Min----- --AVg----- --Max Sinuosity 1.2 Meander Wavelength (ft) 88.23 104.76 115.67 Radius of Curvature (ft) 12.97 17.67 24.44 Belt Width (ft) 44.17 45.22 46.5 Profile Summary Data Based on the following: Variable Min Avg Max ----------------------- S riffle (ft/ft) ---- ----- 0.01723 -- ----- 0.02464 -- -------------- 0.03456 Spool (ft/ft) 0.00099 0.00427 0.00947 S run (ft/ft) 0.0125 0.02112 0.03619 S glide (ft/ft) 0.00199 0.00529 0.00753 P - P (ft) P length (ft) 67.6 11.01 71.36 17.42 77.5 31.56 Dmax riffle (ft) 2.41 2.41 2.41 Dmax pool (ft) 3.76 3.76 3.76 L Dmax run (ft) 1.87 2.3 2.56 Dmax glide (ft) 1.64 2.47 3.28 how Bank Ht (ft) 0 0 0 ' Bankfull Slope (ft/ft) 0.01149 Hydraulic Summary variable--------- ------- Min Avg Max ----------- Discharge (cfs) ------- ------- ------------------------ 98.16 Velocity (fps) 3.19 Hyd Radius (ft) 1.21 1.21 1.21 Bkf Shear (lb/ sq ft) 0.87 0.87 0.87 RIVERMORPH REACH SUMMARY ---------------------------------------------------- ------------------ River Name: Silver Creek & Trib Restoration Reach Name: Reach 1 (Reference Reach) Stream Type Valley Type D50(mm) Val Slope BKF Q(cfs) DA(sq mi) I C 4 VIII 38.5 0.0097 98.16 1.16 ~ Dimension Summary (.1~1M~s;v~r'L~-SSr2.4'T~~~S ~ 1 Database based on the following Cross Sections: Riffle Section 0+22 Pool Section 3+20 i Variable ------------------ Min Avg Max ------------- wfpa / wbkf ------------- 9.66 -------- 9.65862 ------------------ 9.65862 Abkf 30.77 30.77 30.77 Dmbkf 2.41 2.41 2.41 Dbkf 1.28 1.28 1.28 wbkf 24.02 24.02 24.02 Pool Area / Abkf 2.03997 2.03997 2.03997 Max Pool Depth / Dbkf 2.9375 2.9375 2.9375 Mean Pool Depth / Dbkf 1.82031 1.82031 1.82031 Pool width / wbkf 1.12281 1.12281 1.12281 Run Area / Abkf 0 0 0 Max Run Depth / Dbkf Mean Run Depth / Dbkf 1.46094 0 1.79687 0 2 0 Run width / wbkf 0 0 0 Glide Area / Abkf 0 0 0 1 Max Glide Depth / Dbkf 1.28125 1.92969 2.5625 Mean Glide Depth /Dbkf 0 0 0 Glide width / wbkf 0 0 0 i Pattern Summary Variable Min Avg Max sinuosity 1.2 ~m / w bkf 3.67319 4.36137 4.81557 Rc / w bkf 0.53997 0.73564 1.01749 wblt / wbkf (MwR) 1.83888 1.8826 1.93589 Profile Summary Data Based on the following: variable----------- Min Avg Max ------------- S riffle / S bkf (ft/ft) --- ------ 1.49956 - ----- 2.14447 ----------------- 3.00783 Spool / 5 bkf (ft/ft) 0.08616 0.37163 0.82419 s run / S bkf (ft/ft) 1.0879 1.83812 3.1497 S glide / S bkf (ft/ft) 0.17319 0.4604 0.65535 P - P / w bkf (ft) P length / w bkf (ft) 2.81432 0 45837 2.97086 0 72523 3.22648 1 31391 Dmax riffle / D bkf (ft) . 1.88281 . 1.88281 . 1.88281 Dmax pool / D bkf (ft) 2.9375 2.9375 2.9375 ' Dmax run / D bkf (ft) 1.46094 1.79687 2 Dmax glide / D bkf (ft) 1.28125 1.92969 2.5625 how Bank Ht / Dmax riff (ft) 0 0 0 Bankfull Slope (ft/ft) 0.01149 Hydraulic Summary variable _____________________Min___-___Avg_ Max -------------- --------------------- Q bkf 98.16 v bkf (fps) 3.19 HR / D bkf (ft) 0.94531 0.94531 0.94531 Bkf Shear (lb/ sq ft) 0.87 0.87 0.87 f 1 1 1 n ~~ ' RIVERMORPH PFANKUCH SUMMARY River Name: Silver Creek & Trib Restoration Reach Name: Reach 1 (Reference Reach) Survey Date: 01/13/06 upper Bank ~andform slope: 1 Mass wasting: 2 Debris yam Potential: 1 vegetative Protection: 2 power Bank Channel Capacity: 0 Bank Rock Content: 1 Obstructions to Flow: 1 Cutting: 3 Deposition: 3 Channel Bottom Rock Angularity: 0 Brightness: p Consolidation of Particles: 1 Bottom Size Distribution: 3 Scouring and Deposition: 5 Aquatic vegetation: 1 Channel stability Evaluation sediment Supply: Moderate Stream Bed Stability: stable W/D Condition: Normal Stream Type: C4 Rating - 24 ' Condition - Good Reference Reach Brindle Creek} Particle Distribution L ~_ .1.+ >_ Q} L " . ~ ~ u 1 UO 1 U00 111000 .Composite (PC} ®Riffle iC-S CJ+'~2 ~;Fi_'} Pool X-P 3+~p iPC Particle Size {mm} ' s' ~ „. ~$' ~r ~ :. a ,~ ~ ~ ,r _ r t .~ ^ ~~ x ~ ~ ,~ ~:,„ . It ~ ~> v Y ~ i ~ 'arc w i. ,~ .. ite ~ ~ 1¢ ~ , f ~ ~~ ~ - r , a,~. ~~. ~ k ~ ^ x F~ ^ F ~ .Y n ~~~ 1,a~°,q v ~ . , ~ .' ` •~,` ~ ~N ~~ . "~ ! ,yam f ~ + ~~ ~ ~ z~ PMf r "' a ~ ,, „ a i mw~ ~ .ro M i i i w ~ ~~ '. `M m ! ~ .f-~ ~ . ~~ mod`"' :.^~ 1 K r ~ }"~ t ~ ~~ ~ fr ~ ~. ~x` 9 Y~ i w K~, I ~ A Y •t H ~ e tit ~~ v *. v ,. .. . ~~ ... Y r :Nf ., ~- n .~ a +! ~':?Y" 1YF rv. R" h. ,' i an ,.n ., a i ~ ~. ~ .yf ~Y' u. ~) y . .1, . ~I - a r 1 X Yy,~. .. ~ .. , . ; , 4 . _ ~ . ,, . ~ ~ , tir. ~ ~ sue" {F ,. t 4 s :,,..: ~ ,.,~ ' ._ . . ~ 4 ~"~" ~- * `~ ~~~ ~ . +..~ ~. -::..~ ~~..~w.~. ~. . . _ a... ..ter ~...~...-.. _ g~ ~~ .c ' Al _.. .y reg. R ~ ',~ ~ ,; n { ~~ ~4 ~~ ~, ~ ~ ~ ~ ~~ ,~ ,. .. ., ~., ,,,~ ~ ,i ,.._ k Y~ ' t i of .,, L ~ ~ ~ e n ~( Y ~ . F -~' ,. ~ t-15W. ~ ~t.~ ~u ~~~ , ( i Yr ~ ~ iY +. ~ n ~~„ Jl,~ r ~~ ~ j ~ ` ' ~ , ~ w .. `~tRt'~. c s `. L Y. .. e ~ ~, _~ , ~ "~ - ~+C~~' ~ '~ ar.. ~ i T~.rr '4'~'~"y' sn ~" ~~ ° ,~ ~ ~~ ~ , - ~ ~i 'to ~ . ~~ ... ,. ~~ .: ~ `,, ~ !.},~ ~ p ~ z ,, o- ~ ~+^. ~' I t~ ,; ~ u y e, ' ; i~ w., t ~ ry , W ~,. S , ., Y ~k W , ~ L 4.+ ulv+ ~ ,C ", " ~ . ;} [a N 1 Y d F ~ R ' 1 a '~k. 1 ~ t 9 ~ ., ~.. , M n ,, ; 4 '}4~ A~ ~ d `~ M 4~ ~ f ,, tir `x ~ a: T _~§ Z ~ }.: fi ~ eF ~ ,, C ~, ' ~ ~ P F~~ ~ f P .' S ,N. .y. ilC/ ~ k' `~ fe w i~ tl~ ~~~ , [ a" ~ _ .fit ~ ` V„+; ~ ,. ~ ~ ~ = ~.. ;, - ~, Il- ~ro ~' ' ~ ~ ~ e I t , r,:. 'ri ~ ~ ~ n ~ i. ~ F l~! ~ ~ ~~~ 1 a ., .,, rs~..: # akH~ N`.~.~~• .. eta'; ^~:, r. _ rv y:.. s - 1 ii 1 LJ J RIVERMORPH PARTICLE SUMMARY River Name: Silver Creek & Trib Restoration Reach Name: Reach 1 (Reference Reach) Sample Name: Composite Survey Date: 01/13/06 Size (mm)--------- ----- TOT # ITEM % CUM 0 - 0.062 ------- - - - 0 ----------- 0.00 --------------------------- 0.00 0.062 - 0.125 0 0.00 0.00 0.125 - 0.25 0 0.00 0.00 0.25 - 0.50 1 1.00 1.00 0.50 - 1.0 22 22.00 23.00 1.0 - 2.0 1 1.00 24.00 2.0 - 4.0 0 0.00 24.00 4.0 - 5.7 1 1.00 25.00 5.7 - 8.0 0 0.00 25.00 8.0 - 11.3 2 2.00 27.00 11.3 - 16.0 6 6.00 33.00 16.0 - 22.6 5 5.00 38.00 22.6 - 32.0 22 22.00 60.00 32 - 45 17 17.00 77.00 45 - 64 10 10.00 87.00 64 - 90 9 9.00 96.00 90 - 128 3 3.00 99.00 128 - 180 1 1.00 100.00 180 - 256 0 0.00 100.00 256 - 362 0 0.00 100.00 362 - 512 0 0.00 100.00 512 - 1024 0 0.00 100.00 1024 - 2048 0 0.00 100.00 Bedrock 0 0.00 100.00 D16 (mm) 0.84 D35 (mm) 18.64 D50 (mm) 27,73 D84 (mm) 58.3 D95 (mm) 87.11 D100 (mm) 179,98 silt/Clay (%) 0 Sand (%) 24 Gravel (%) 63 Cobble (%) 13 Boulder (%) 0 Bedrock (%) 0 Total Particles = 100. ~ CDWQ Stream Classification Form ~`"``~`'`~ ~'r; n d ~e Grcely ~ J 'roject Name: Rive Basin: C:0.TGtGU•DC~ County: ,8(,(/li1~Qr Evaluator: ~'~R~~/ ~~S Pd ~Y~2rCxee~ ~ U7' ~s~or~-~n Plan ~WQ project Number: Nearest Named Stream: Latitude: ~$~D~~ t0 ~M>~ Signature: ~~~N 5 d l (o - ~ ~ ~ i ve.r Creer~ ~2~ ~ n p J~ j~/a~~ USGS QUAD: ~ (.ey- /~ (P~2• Longitude~il'~ ~ Location/Directions: ~OLDriI /IY~~L EAS N TE: If evaluator and landowner agree that the feature is a man-made ditch, then use of this form is not necessary. ~ >;n1 U C)/bLC.S so, if in the best professional judgement of the evaluator, the feature is a man-made ditch and not a modifed natural stream-this •p ~ . acing system should not be used* ^rimary Field Indicators: (Circle One Number Per Line) Is The USDA Texture In Streambed Is There An Active (Or Relic) Is A Continuous Bed & Bank Present? 0 1 2 Is A 2"" Order Or Greater Channel (As Indicated ~IMARY GEOMORPHOLOGYINDICATOR POINTS: I. Hydrolol?y Absent Weak Moderate StronE ~ Is There A Groundwater YHYDROLOGYINDICATOR POINTS: Is This Year's (Or Last's) Leaflitter ater In Channel And >48 Hrs. Since Is There Water In Channel During Dry 0 .5 Are Hydric Soils Present In Sides Of Channel (Or In Headcutl? ~~,ECONDARYHYDROLOGYINDICATOR POINTS: 1.5 re Wetland Plants In Streambed? SAV .., Mostly OBL Mostly FACW Mostly FAC Mostly FACU Mostly UPL OTE: If Total Absence Of All Plants In Streambed 2 1 .'J$ .5 0 0 fs Noted Above Skin This Step UNLESS SAV Present*1 ~ECONDARYBIOLOGYINDICATOR POINTS: ~,5 Than Or Equal To 19 Points The Stream Is At Least Intermittent) >econdary Field Indicators: (Circle One Number Per Line) ~~ECONDARY GEOMORPHOLOGYINDICATOR POINTS: I ~ t" 1 r 1 1 1 1 1 1 1 t 1 O L a ~~ O J N N U, W ~~-{L'~ W ~../ U (~ N N U N~y~ LL ^L, W ~, ~ sy m a ~ O (}}) uoi}enal3 N (*) V a a a O + X M M OI m - a-------- ------ ~ m a 0 0 M m N N 0 N ` am O N cc C L o ~.+ N m ~ c 0 v N_ o O W . ~ O N m 00 OD m m m O 0 ~ i ~ r r ~ ± r ~ 1 ~ 1 ? ! I ~ !r ----------------------RIVERMORPH-PROFILE SUMMARY ------------------------------------- River Name: Silver Creek & Trib Restoration Reach Name: Reach 1 (Reference Reach) Profile Name: Ref Reach Long Pro Survey Date: 01/13/06 ' Survey Data STA-------CH--_ 0 8.43 22 8.44 34.6 8.67 41 8.82 ' 53.5 9.44 59 9.38 63 9.4 70 10.35 74 9.88 82.3 9.22 86.3 9.12 ' 95 9.98 100 10.18 107 10.24 109 9.78 116 9.84 133 10.22 138 10.75 ' 147.5 11.31 152 9.78 152.5 9.56 ' 163 9.88 169.6 9.95 179.5 10.16 187.5 10.35 ' 194.5 10.94 200 11.15 215 10.98 ' 231 9.86 250 9.93 262 10.32 ' 263 11.19 268 11.04 273 11.76 284 11.96 ' 290 11.33 300 10.9 308 10.8 317.5 11.26 320 12.32 329 11.96 330 11.56 341 11.1 353 11.35 -WS------BKF-----P1------P?------P3------P4 8.02 6.02 8.16 6.98 8.62 6.86 8.65 8.88 6.84 8.86 8.8 8.85 8.9 8.95 8.93 9.13 9.17 7.4 9.18 9.2 7.94 9.2 9.2 7.62 9.17 9.25 9.18 9.28 9.4 9.66 9.88 10 10.08 10.18 9.39 7.43 9.51 9.62 10.05 10.38 10.44 10.42 10.4 10.44 9.3 10.44 10.45 10.78 10.78 9.25 10.76 10.86 10.76 11.17 Cross section / Bank Profile Locations Name Type Profile Station ---------------------------------------------------------------------- Riffle section 0+22 Riffle xs 22 Pool Section 3+20 Pool xS 320 ' Measurements from Graph Bankfull Slope: 0.01149 variable Min Avg Max s riffle 0.01723 0.02464 0.03456 S pool 0.00099 0.00427 0.00947 S run 0.0125 0.02112 0.03619 ' S glide 0.00199 0.00529 0.00753 P - P 67.6 71.36 77.5 P length 11.01 17.42 31.56 Dmax riffle 1.62 1.72 1.86 Dmax pool 2.71 3.06 3.29 Dmax run 1.87 2.3 2.56 Dmax glide 1.64 2.21 2.7 Low Bank Ht 0 0 0 Length and depth .measurements in feet, slopes in ft/ft. ' RIVERMORPH PROFILE SUMMARY Notes River Name: Silver Creek & Trib Restoration Reach Name: Reach 1 (Reference Reach) Profile Name: Ref Reach Long Pro Survey Date: 01/13/06 ' STA Note ---------------------------------------------------------------------- 0 Riffle Begin 22 Riffle x-S 34.6 Riffle End 41 Run ' 53.5 Run 59 Pool Top 63 Pool ' 70 Pool Center 74 Glide 82.3 Glide 86.3 Run 95 Run 100 Pool 107 Glide 109 Run 116 Pool 133 Pool Transition (Compound Pool) ' 138 Pool Center 147.5 Pool 152 Glide 152.5 Glide 163 Riffle 169.6 Riffle End 179.5 Run 187.5 Run 194.5 Pool 200 Pool Thalweg u 1 1 1 i 1 1 t 215 231 250 262 263 268 273 284 290 300 308 317.5 320 329 330 341 353 Pool Glide Run Run Run Run - Pool - Pool Pool Glide Glide Run Top Lat. Log Vane Bottom Lat. Log Vane Pool (X-5) Glide Glide Riffle Riffle End RIVERMORPH PARTICLE SUMMARY River Name: silver Creek & Trib Restoration Reach Name: Reach 1 (Reference Reach) Sample Name: Riffle x-s 0+22 Survey Date: 01/19/06 ' Size (mm) TOT # ITEM % CUM --------- --------- 0 - 0.062 ------- - --- 0 ----------- 0.00 --------------------------- 0.00 0.062 - 0.125 0 0.00 0.00 ' 0.125 - 0.25 0 0.00 0.00 0.25 - 0.50 0 0.00 0.00 0.50 - 1.0 1.0 - 2.0 0 0 0.00 0.00 0.00 0.00 2.0 - 4.0 0 0.00 0.00 4.0 - 5.7 0 0.00 0.00 5.7 - 8.0 0 0.00 0.00 8.0 - 11.3 0 0.00 0.00 11.3 - 16.0 1 10.00 10.00 16.0 - 22.6 1 10.00 20.00 ' 22.6 - 32.0 2 20.00 40.00 32 - 45 2 20.00 60.00 ' 45 - 64 64 - 90 3 1 30.00 10.00 90.00 100.00 90 - 128 0 0.00 100.00 128 - 180 0 0.00 100.00 180 - 256 0 0.00 100.00 256 - 362 0 0.00 100.00 362 - 512 0 0.00 100.00 512 - 1024 0 0.00 100.00 1024 - 2048 0 0.00 100.00 Bedrock 0 0.00 100.00 ' D16 (mm) 19.96 D35 (mm) 29.65 D50 (mm) 38.5 60.2 ' D95 (mm) D100 (mm) 90 Silt/Clay (%) 0 sand (%) 0 Gravel (%) 90 Cobble (%) 10 Boulder (%) 0 Bedrock (%) 0 ' Total Particles = 10 (need at least 60). 1 t 1 0 v m m m a M n r~ A V 0 V r v v v ~ ~ J V +.~ • N_ l~ r ~ 0 N .` O 2 [}}) uoi~~nal3 a 0 d y O i, U a~ w v a~ a~ a a~ L N N ~p O O c 0 ~ '" v~ ~'' a~ ~ 4, a' o ea w ti a ^ ~ ~ ~ ~ ~ R~ ren~Re ~ ~ ~ » ~ ~ l~ ~ ach ool Section 3+20 Ground Points ~ Bankfull Indicators Water Surtace Points Wbkf - 27 nti~c _ o ., 1 1' 1' 11 .~. ~ 11 C O Ctl ~ 11 W 11 11 11 11 11' - -~ -'~ ao 4u 45 50 Horizontal Distance (ft} C O ~r+ u O L U 0 0 o.~ u cd v C v L 6~ O M O c N o M; ~ r" v1 ~' a~ ~ .~ 7 O CC ~r ~ ' ECOSYSTEM ENHANCEMENT PROGRAM Restoration Plan -Silver Creek and Unnamed Tributary EEP Contract # D05016-1 r J 1 1 APPENDIX 6 HEC-RAS Analysis 1 mm U « ` O p O N d ~ y c ~ Et~~ E p0 d w ~ V W O~f ~ o ~« 8 N ~ ~ ~~ ¢ ~ N ~ ~ ~ y~~OW W ~ 1'~ ~ ~~ FO _ Z ~ ?_ ~"~ O Y~QZ O Z r~. w Z W C W Z Y d O. ~ ~ ~ ~ ~ ~ Z ..J M ~ W ~ ~~W~~ .W.i N Z ~~ ~ On ~ p„ M W p ~Ey~O~~p Z ~ w W ~. O p ~ = a Z C ~`Q ~ ~ ~ O~ O WO a ~ ~ «r~~LL Q " CC Z ~x~0 °oz ~ ~° ~`$~w ~ ¢ IG U N- ~ ~ ~~~~m x o a: O ^~z+ W~ v ^~ SOt~« 0 C ~~ ~ ~ O~ Z'w u lOF-NnV a z LL ~ CQ '~. 2 a ~ .g `° ~ E "m r ' d {fl ~.LL L W O ® U C O m a Y ~ « O ~ ~ O U ~ O o c~°'"8 N C ~ ~ Y i W ~ °_°mE~i~ u nY o ~~o:.a -' ~ ;, Z ~ ~ . . °~~' ~ " . -~ , ~~ /~ // ~ '---- -- J /// /„ ~.,- ~~=~. 11 ,~, ~'~~ it ~ ~ ~ ,cif l o ~ ~~ Creek . °~ '~ // ~i ~ - ,, ~ _,~ 5ti~ .. _ ~ ' :. `\a` .~ ~ \\ 1~_~ \\ .-- ~_ \\ // ~ e ) .~- 11 .\ ~/ • / //r •~ ~ 11 1? \ `\\ ~\ ///o ~~~\L 7 / 1 . !1 11 ~ ,, ~ ( ~, „ `~~ /.. „„ ,, „ .. „ ~ .. h \\ 0 ~ 11 ~~ ,\ . r E~ ,• ~~ „ ~~ ~ ~ o ;, ~.-,, . „ 0 ~` r: ~ 11 .1 11 ~~~ ~~ o i ~~~ ,~ o,~%%. „` `~' ~ ,~Y I _ ' y-~ Silver Creek Stream Restoration 1000 ~ 100 m r v Frequency (Years) c m a' LL 10 1 200 578 983 1315 1810 2245 2718 4060 Discharge (CFS) io-- 9-- 8_ ~- 6_ c 4_ ' 3: L__ dl d' ~~ 1-- t g_ 8 7 6_ G~ 5- 4_ 3_ 2_ 0 0 1 } ~ T mo ~~ ~ 9 ~W ~ s a 6 7 ww NY ~C' 5 4 ' 3 1 ~2_ I.'} ' (1 S, LvErG G rr~~ ~,.~s, ~~.'4,~-~: r_.,.-t rrr; -- r~ .Sow h ~ - _ ~ ~ ~ ~ ~--_ --~ -- ___ __ - - ~ ~- _. _ _r`... =J--- ~5-i-~- , -- ~-r- r • ' L i.- _-i - 1 ~ ' 1 I - _ _ ~ ~-.- _ I I ~ ~ I l i I I I t I I I I I I I - -•--r--~- ~ -~ -~-r-- --i-~ ~ r-'--,_ ~ ~ i I I ' '• I I ' I I I i j, ~ i I I I i t i I I I I ~tt- i l i! I ~I ' ; ~- ~ ( I I ! ' I ' I I I . I I I I ~ I; I i I I 1 I I i I - Ilil !III I ill I I I I _ ~~- ~* -- _ i ' _ .--T • ti-J~..I_ ' . I ~ ~ - ' ~ ~~ i . ; ' _ I ' i -;-~---~ ' I l ' I l i j ~ i I I -1-I I I 1 ~ i ~ I I I I ! I - l l I ..~ I , ~ ' I ~ I I I I I I I 1 I I i t I I I I I r '. I I I I _r-; _' 1-T ~ i ~ ~~_~ _ _ ~t-~ _ ~ -~ i -_4 1._ ~ ~~ - , ' ~.- - - i -~-- -„-T--' I I ' I`t-' I I I - - I ~~-~ ' i ~ ~ , j I I I ~ , i , i I ' t I I r-_.` ~ i I I I -j ~ I ~ I i i I I I ~ - - 1 I I I I I I I ~rt ~ -;-I---r'? ,i ; ~_ _ j.1 '~ -T; ' + ,, ~ i ; i t,~li i I ~ i I i I I I i I II ' II I' i II ~ I _ ~ ~ ~ i - I i ' ~ I I . ~ I , I I I I ~ I I r i I j I ~`-- I. ' -~ ____~_. yn~ _L I t ~„ l ~ l i t l i I I I t i i I " I I I I I I ~ _ - _ _ I cso G,c~> ~~~ _ Gar _ ~. ~3U ,. ZInF ;77r~ 2~'~, yl~n sf~~at~ L, ~ .~ 1 r i i [' i M ~L - r--f-~~ d~--f / ~~ % 1 i ~ I,L ~f l y1~r HFr:RAS Plain avlcfim River Cilvar f`rm4 oe.,..f.. W ... .._ Reach ' River Sta ' Profile G Total Min Ch £I' W.S. Elev Crit W S E.G Elev E.G Slope VeI Chnl Flaw Area Top : l (ds) (fl) '. (ft) :,:. (fl) 'tn1 (Nft) - (tt/s) (sq ry) (ft) Restoration 4451 2--year ` 578.00 1126.46 1731.96 ~ 1132.28 0.002543 4.53 127.71 29.2 0 38 Restoraton Restoration 1451 4451 5- ar 100-year 983.00 2718.00 1126.46 1126.46 1133.81 1136.86 1134.25 1137.55 0.002535 0.002876 5.31 7.46 185.65 545.91 -j 3 . 153.19 . 0.39 '. 0.45 Restoration 4103 2-year 578.00 1124.88 1130.99 1131.34 0.002802 4.79 120.66 % 27.1' 0.40 Resforation 4103 Syear 983.00 1124.88 1132.78 1133.29 0.003007 5.70 172.51 30.72 0 42 Restoration 4103 700-year 2718.00 1124.88 1134.73 113:..'3 1136.06 0.006287 9.98 418.69 196.97 . 0.64 Restoration 3763 2-year 578.00 1124.10 1130.24 1130.48 0.002127 3.97 145.62 37.89 0.36 Restoration 3763 Syear 983.00 1124.10 1131.96 1132.26 0.002686 4.33 226.84 -y 62.81 0 40 Restoration 3763 tp0-year 2718.00 1124.10 1134.01 1134.27 0.001919 4.89 993.76 .21 . 1 0.36 ~ Restoration 3555 ' 2-year 578.00 7123.95 1129.72 1130.02 0.002321 4.3& 132.97 31.19 0.37 Restoration Restoration 3555 3555 Syear 100-year 983.00 2718.00 1123.95 1123.95 1131.31 1133.40 1731.71 1133.80 0.002431 0.002456 5.18 6.33 227.12 870.25 130.26 411.08 0.39 O,qt Resloration 3170 2 year 578.00 1122.70 1128.61 1728.94 0.003414 4.62 125.21 37.51 0.45 Restoration 3170 Syear 983.00 1122.70 1130.32 1130.64 0.003066 4.54 230.37 126.46 0.43 Restoration 3170. 106 year ~ 2718.00 1122]0 1132.30 1132 75 0 003042 6 12 727 67 3 . . . . . 48.57 0.46 Res7otalon 2975- 2<year 578.00 -~ 1127.9 112828 0.003330 4.77 121.17 33.67 = 0.44 Restoration Restoration 2975 2975 5-year 983,Op 106 year_ 2718.00 7121.97 1121.97 ' 1131.91 1130.00 113222 0.003314 0.002090 5.34 5.62 184.23 945.47 ~1~ 57.98 . 0.46 0.39 ~ -__ ~ Restoration 6W~ 1 2-year _ ~ - 594.00 .54 1127.46 1127.63 0.001435 3.36 776.96 43.92 ' 0.29 [2es(oraticn 2690_ Syear ~ .1010.170 1120.54 1129.09 1129.33 0.001510 3.96 261.93 -+- 114.09 0.31 Restoration2690 If00year -_. 2788.00 1120.54 1131.63 1137.79 0.000953 4.73 1361.63 531:56 0.27 ~. ,--- Restora6on '2460 2-year ~ 594.00 ~- _ Restoration 460 .Syear 1010.00 1120.00 1720.00 1127.09 1128.81 1127.29 1129.03 0.001500 0.001141 3.65 3.97 763.87 384.49 49.76 250.52 0.31 0.28 Restoration 24110 ^~ I h _ 100.year 2788.00 1120.W 1131.45 7131.59 0.000743 4.08 1501.42 506.22 0.24 Rasbra5c~n~2?95;:' Restoration ' g5 2-year Syear 594.00 1010.00 1120.02 1120.02 1126.58 1128.37 1126.93 1128.71 0.003190 0.003362 4.74 4.68 125.32 222.96 34.13 107.47 0.44 0.45 ReSto<a6cn _295 -~-_-- fOQ-year 2788.00 1120.02 1131.09 1131.39 0.001803 5.09 899.45 340.60 0.36 Resfaration 197p '' 2-year 594.00 1119.80 1125.72 1126.02 0.002401 4.37 135.88 33.37 0 38 Restoration 1970. Syear -- 1010.00 7119.80 7127.36 1127.78 0.002456 5.17 205.80 83.17 . 0.40 Restoration197053. f00.}rar 2788.00 1119.80 1130.68 1130.90 0.001162 4.88 1071.40 318.42 0.30 Restoration Restoration Restoration . 7500 151x1 7500 2 year 594.00 Syear 1010.00 100.year 2788.00 1118.07 1118.07 1118.07 1122.0.5 1123.31 1127.67 1122.05 1123.31 1127.67 1123.45 1125.17 1129.54 0.019005 0.018138 0.009280 9.51 10.94 11.47 62.45 92.32 30.5.28 22.29 25.77 96.11 1.00 7,p7 0.78 ~h, /~`~ ~~~ ~ ~ i W Fronde I r 1 1 1 1 L 1 Via, o- ~~ ~ `~ ~" .~~ Reach River Stn r~mfile Q Total - Min Ch El W S. FJev Cril W.S E.G. Elev fl.G Slope Vet Chnl > fTow fvea- Top Width Fronde ar CN - restoroti0p restoration restoration 1430. 1430 1470 2 yr Syr 100-yr (mss) 23.00 44.00 154.00 (8) r'. 1190.30 1194.30 1194.30 ~~. 1195.24 1195.54 1196.54 (n) 1195.24 1195.54 1196.54 (h) 1195.51 1195.93 1197.30 `~~) 0,030675 0.027520 0.021808 t~s) 4.20 4.98 7.05 (sq fl} -,. 5.48 8.83 22.06 (ft) 10.32 11.72 15.20 1.02 1.01 1.00 restoration restoration restoration 1285. f285'- 1285' 2ryr Syr 100-yr 23.00 44.00 _ 154.00 1187.02 1187.02 1187.02 1188.71 1189.23 1190.67 1188.71 1189.23 1190.67 1189.15 1189.78 1191.50 0.032839 0.029672 0.021216 5.30 5.96 7.36 4.34 7.38 21.97 5.13 6.80 15.60 1.01 1.01 0.95 restoration restoration restoration 1110 1110 1140 2-yr Syr 10(1-yr 23.00 44.00 154.00 1182.19 1182.19 1182.19 1182.94 1183.17 1183.78 1182.94 1183.17 1183.78 1183.14 1163.42 1184.27 0.033264 0.030551 0.024345 3.52 4.01 5.61 6.53 10.97 27.54 17.37 22.51 29.31 1.01 1.01 1.01 restoration restoration restoration 895 895 895 '' 2-yr Syt 1ll0.yr 23.00 44.00 154.00 1173.00 1173.00 1173.00 1173.86 1174.10 1174.88 1173.86 1174.10 1174.88 1174.08 1174.40 1175.47 0.032061 0.029329 0.023275 3.76 4.41 6.19 6.12 9.98 24.90 14.27 17.06 21.32 1.01 1,02 1.01 restoration restoration restoration 560 - 560 ' 560 2-yr Syr 100.yr 23.00 44.00 154.00 1157.36 1157.36 1157.36 1158.47 1158.86 1160.05 1158.47 1158.86 1160.05 1158.81 1159.33 1160.88 0.029451 0.026878 0.022972 4.70 5.48 7.31 4.90 8.03 21.07 7.30 8.75 13.30 1.01 1.01 1.01 restoration restoration 340 340 '.' 2-yr' S-Yf.; 23.00 44.00 1148.46 1148.46 1149.37 1149 66 1149.30 1149 63 1149.61 1150 08 0.021812 0 0246 3.97 5.79 8.93 0.87 restorofion ., 340 - 400-yr 154.00 1148.46 . 1150.79 . 1150.79 . 1151.68 . 54 0.023623 5.17 7.58 8.52 20.31 9.47 11.54 0.96 1.01 restorohon restorohon restoration f00 - 100 100 '--. 2-yr. Syr 100-yr 23.00 44.00 154.00 1142.39 1142.39 1142.39 1143.06 1143.30 1144.02 1143.06 1143.30 1144.02 1143.27 1143.58 1144.51 0.032606 0.029446 0.024443 3.65 4.27 5.67 6.30 10.31 27.18 15.63 18.70 28.31 1.01 1.01 1.01