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HomeMy WebLinkAbout20120658 Ver 1_Restoration Plan_20121113I I I'EcoEngineering - 1 A division of The John R. McAdams Company, Inc. LETTER OF TRANSMITTAL To: Mr. Eric Kulz NC Division of Water Quality WeBSCaPe Unit Stream / Wetland Mitigation Coordinator 512 N. Salisbury St., Archdale Building - 9th floor Raleigh, NC 27604 Re: Duke Water Reclamation Pond DWQ # 20120658 STREAM RESTORATION PLAN I am sending you the following item(s): Date: November 13. 2012 ** HAND DELIVER ** Job No.: DKU -08010 COPIES DATE NO. DESCRIPTION aL Stream Restoration Plan Notebook w. Figures /Appendices 2 Large 24 x 36° Design Detail Sheet Plans 1 1 1 1 1 CD Copy of Design Detail Sheet Plans These are transmitted as checked below: I Copy to: As requested For approval For review and comment '� 11 f''' Cii12 ei QUALITY ❑ For your Signed: Kevin Yates Senior Enviro FOR INTERNAL USE ONLY ® Copy Letter of Transmittal Only to File ❑ Copy Entire Document to File 2905 Meridian Parkway, Durham, North Carolina 27713 PO Box 14005, RTP, North Carolina 27709 Scientist Stream Restoration Plan for the Duke University Water Reclamation Pond DURHAM, NORTH CAROLINA 299 DKU -08010 N 0 V 1 33 20 e? DENR - WATEP WiWY October 2012 Angela Gardner Water Resources Engineer Kevin Yates Senior Environmental Scientist Restoration Plan • Duke University Water Reclamation Pond Stream Mitigation USGS HUC 03030002 • Durham County, North Carolina • October 2012 TABLE OF CONTENTS 1.0 Introduction ................................................................................................. ............................... l 2.0 Project Goals and Objectives ....................................................................... ..............................4 3.0 Site Description ........................................................................................... ..............................5 3.1 Project Location ..................................................................................... ..............................5 3.2 Surface Waters ....................................................................................... ..............................5 4.0 General Watershed Description ................................................................... ..............................5 4.1 Proposed Project and Stormwater Controls ........................................... ..............................6 5.0 Existing Stream Conditions ........................................................................ ............................... 7 5.1 Existing Stream Geometry ..................................................................... ..............................8 5. 1.1 Stream Survey Methodology ........................................................ ..............................8 5.1.2 Bankfull Verification .................................................................... ..............................8 5.1.3 Stream Classification .................................................................... ..............................8 5.1.4 Channel Classification ................................................................. ............................... 9 5.2 Stream Substrate .................................................................................... ..............................9 5.3 Soils ....................................................................................................... ..............................9 5.4 Existing Plant Communities ................................................................. .............................10 5.5 Threatened and Endangered Species .................................................... .............................11 5.6 Cultural Resources ................................................................................ .............................12 6.0 Reference Reaches ...................................................................................... .............................12 6.1 Terrible Creek ....................................................................................... .............................13 7.0 Stream Channel Design .............................................................................. .............................13 7.1 Natural Channel Design ........................................................................ .............................13 7.2 Dimension ............................................................................................. .............................14 7.3 Pattern ................................................................................................... .............................14 7.4 Bed Form .............................................................................................. .............................14 7.5 Riparian Area ........................................................................................ .............................15 7.6 Stormwater ............................................................................................ .............................15 7.7 Stream Structures .................................................................................. .............................15 7.7.1 Rock -and -Roll Riffle ................................................................... .............................16 7.7.2 Toe Wood .................................................................................... .............................16 7.7.3 Rock Clusters ............................................................................... .............................16 7.7.4 Log Vane and Log Cross - Vanes .................................................. .............................16 8.0 Riparian Planting Plan ................................................................................ .............................16 9.0 Monitoring Plan .......................................................................................... .............................18 9.1 Stream Monitoring ................................................................................ .............................19 9. 1.1 Bankfull Events ........................................................................... .............................19 9.1.2 Longitudinal Profile ..................................................................... .............................19 9.1.3 Cross Sections .............................................................................. .............................19 9.1.4 Photograph Stations and Visual Monitoring ................................ .............................20 9.2 Vegetation Planting Monitoring ........................................................... .............................20 9.3 Long - Term Preservation Mechanism ................................................. .............................20 10.0 Success Criteria ........................................................................................ .............................20 10.1 Stream Success Criteria ...................................................................... .............................20 10.2 Vegetation Planting Success Criteria .................................................. .............................21 11.0 References ................................................................................................. .............................22 FFB]EcoEngineering 1 AdYmmof7Le John RMMdmCam ,I= Restoration Plan • Duke University Water Reclamation Pond Stream Mitigation USGS HUC 03030002 • Durham County, North Carolina • October 2012 In -Text Tables Table 1. Proposed Stream Mitigation Units ( SMUs) ........................................ ..............................1 Table 2: HEC -RAS modeled existing hydrology and bankfull indicators ........ ..............................8 Table 3. Stream Substrate from Pebble Counts and Sieve Analysis ................ ..............................9 Table 3. Soils within 200 feet of Unnamed Tributary to Sandy Creek ........... .............................10 Table 4. Federally Protected Species .............................................................. ..............................1 l Table 5. Federal Species of Concern ............................................................... .............................11 Table 7. Plant List ........................................................... 12 Appendix 1— Figures Figure 1. USGS Quadrangle — Northwest/Southwest Durham Figure 2. Durham County Soils Survey — Sheet 21 Figure 3. Vicinity Map: Proposed Water Reclamation Pond & Stream Exhibit w/. Inset 1 Figure 4. Conceptual Mitigation Plan Figure 5. Drainage Area Map Appendix 2 — Regulatory Records & Agency Letters Natural Heritage Program Wildlife Resource Commission US Fish and Wildlife Service NC State Historic Preservation Office Stream Data Forms Appendix 3 — Data Summary: Reference Reach / Existing Conditions / Proposed Design Appendix 4 — Photos of Existing Stream Reaches FE-J]EcoEngineering 11 A &vimn of The John R. McAdams Company, me Restoration Plan • Duke University Water Reclamation Pond Stream Mitigation USGS HUC 03030002 • Durham County, North Carolina • October 2012 With the integration of wetland benches within the proposed water reclamation pond and stormwater management devices along the proposed stream restoration corridor, we are proposing a 1.5:1 mitigation ratio to offset unavoidable impacts to 1,674 linear feet of perennial stream associated with construction of the water reclamation pond. We are proposing to restore 2,572 linear feet of perennial stream for a total of 2,572 linear feet of restoration SMUs, and enhance 634 linear feet of perennial stream for a total of 151 SMUs. EcoEngineering has been working closely with Duke University and their consultant VHB, on the long -term plans for improvements along Campus Drive. The proposed conservation easement to protect the mitigation project has offsets to accommodate future widening along Campus Drive, which includes a greenway parallel to Campus Drive. We have proposed a reduction of 4:1 SMUs where Campus Drive and/or the sewer easement encroach into the 50 -foot riparian buffer. Although this is an urbanized setting most of the impervious surface within the watershed is built -out and there would be little to no new impervious surface draining to the proposed project. The proposed restoration plan also incorporates stormwater management devices, such as level - spreaders, plunge pools, and vernal pools where stormwater runoff is currently untreated. The riparian areas will be planted with the appropriate native riparian vegetation and will provide channel stability, flood attenuation, and a vegetated buffer that will intercept overland stormwater. Species will consist primarily of native trees and small shrubs of the Piedmont, listed in the planting plan below. The long -term preservation mechanism will be in the form of a Conservation Easement in perpetuity. The Durham County Soil and Water Conservation District has agreed to hold the Conservation Easement to provide, third -party, long -term assurance to the success of the project. Although permittee responsible mitigation is not the favored form of mitigation according to the most recent Federal Mitigation Rule, Duke University has the experience and resources to provide good quality, on -site mitigation, and ensure its long -term success for the following reasons: 1) The proposed stream restoration project is within the same watershed as the proposed impacts and both are upstream unnamed tributaries to Sandy Creek, providing on -site, in -kind mitigation. 2) The proposed stream restoration project would tie directly into existing, downstream, stream restoration projects providing approximately 13,000 linear feet of contiguous riparian corridor for flora and fauna. 3) Duke University is a large, stable, and very well funded institution, with national and international exposure that has a vested interest in seeing this mitigation plan be highly successful. [JEcoEngineering A divis on of The Jdm It McAdams Company, Inc Restoration Plan • Duke University Water Reclamation Pond Stream Mitigation USGS HUC 03030002 • Durham County, North Carolina • October 2012 4) Duke has secured a long -term, third -party to help maintain the success of this mitigation proposal and ensure it is compliant with its goals. 5) Although the proposed project is to be compliant with the Federal Mitigation Rule, Duke has been pursuing on -site stream restoration since 2008, before finalization of the Federal Mitigation Rule, before any approved mitigation within this HUC, and four years of due diligence invested into pursuing on -site stream mitigation. 6) Duke University is also very engaged in research and monitoring efforts on their stream restoration and stormwater management projects on campus, and sees this as an exciting opportunity to continue these efforts within the same watershed. An unnamed tributary to Sandy Creek has been selected for restoration by Duke University to fulfill a portion of the compensatory mitigation requirements associated with the Individual Permit for a water reclamation pond project. The goal of this restoration project is to modify the current dimension, pattern and profile of an existing stream channel so it will be stable and self - maintaining by utilizing natural channel design techniques and procedures. Duke University is proposing to restore 2,572 linear feet of perennial stream for a total of 2,572 linear feet of restoration SMUs, and enhance 634 linear feet of perennial stream for a total of 151 SMUs. The site has been selected because of the highly degraded and poorly functioning state of the unnamed tributary to Sandy Creek. The historic development of institutional, commercial, and industrial facilities in the drainage area of the UT to Sandy Creek has aggravated the existing erosion problem by increasing the runoff to the area. Development in this watershed threatens to worsen a sediment pollution problem that contributes to water quality issues in Jordan Lake. Based on site observations the degraded condition of the streams within the project area may be the result of historic channelization, periodic dredging, and past vegetation maintenance practices and to a lesser extent storm water runoff onto the site from the incremental increase in impervious surface associated with urbanization. The existing stream banks are generally denuded, actively eroding, and have a nearly vertical profile. As a result, the banks are eroding, subsequently slumping, promoting lateral channel migration, and asymmetrical meander creation. Most sections of channel have limited access to the floodplain during peak flood flows. The channels do not have access to the floodplain during bankfull events that typically occur in stable stream channel during the 1.5 to 2 year return period storm (Leopold et al. 1992). The channels are in a highly incised state; therefore, flood flows are constrained to the channel and the floodplain functions more as a terrace that is not accessible at the bankfull elevation. The streams are in a progressive state of channel evolution referred to as Stage III and Stage IV (Ward and Trimble, 2004). In some areas a new lower and functional floodplain located at the bankfull elevation is beginning to take form within the existing confined channel as a result of active stream bank erosion and bed degradation. Only during intense rain storm events does flood water ever reach the historic floodplain. The unnamed tributary to Sandy Creek is a viable and feasible restoration project. The unnamed tributary to Sandy Creek is morphologically unstable and is contributing to water quality degradation. The current degraded state of the channel, limited floodplain functionality due to FEB]EcoEngineering A division of The John R McAdams Company, Inc Restoration Plan • Duke University Water Reclamation Pond Stream Mitigation USGS HUC 03030002 • Durham County, North Carolina • October 2012 channel incision, existing and future erosion potential, limited native vegetation along the banks and riparian area, and amenable landowners make this site a viable and feasible restoration project. To ensure long term stability of the restoration project, a wide floodplain will be provided along the majority of the project area to allow for increased flood frequency, associated with any future development upstream. With increased flow frequency from an increase in impervious surface, the channel morphology will adjust. Increased flow frequency associated with future land use changes will be conveyed by the floodplain and any adjustment to channel dimension will occur as floodplain aggradation instead of channel degradation. Additional information is located in the Appendices of this report. Report figures are located in Appendix 1. The restoration design plan sheets are located included in the 24 x 36" Design Detail Sheets and CD enclosed. Documents related to the project such as agency correspondence and legal agreements with the property owners are located in Appendix 3. A comparison of the North Carolina Stream Restoration Institute's Regional Curve versus the project specific regional curve is presented in Appendix 4. The existing conditions data collected for the unnamed tributary to Sandy Creek is presented in Appendix 4. Photographs of the project site can be found in Appendix 5. 2.0 Project Goals and Objectives The goal of this restoration project is to modify the current dimension, pattern and profile of an existing stream channel so it will be stable and self - maintaining by utilizing natural channel design techniques and procedures. The design has been developed utilizing Rosgen -based natural channel design principles ( Rosgen, 1996). Preventing future stream bank erosion will be accomplished by fulfilling the following general objectives: 1) Conversion of approximately 3,459 linear feet of the tributary from an eroding, degraded channel to a natural, stable system with restored aquatic habitat. 2) Reduction of sediment loading to a river system that flows into Jordan Lake - a recreational water body. 3) Establishment of a riparian corridor that has a restored floodplain, aquatic, and morphological functions which provide habitat connectivity to the area and will be protected in perpetuity. The following specific objectives will allow the restoration plan to succeed in obtaining the project's goal: 1) Design a channel with the appropriate cross - sectional dimension, pattern, and longitudinal profile utilizing the existing channel condition survey, and collected reference reach data as a guide. 2) Improve upon and create bedform and aquatic habitat diversity (riffles, runs, pools, and glides). 3) Create a nested floodplain (bankfull bench) that will be accessible at the proposed bankfull channel elevation along the entire reach. 4) Ensure channel and stream bank stabilization by integrating in- channel grade control structures, and native vegetation into the proposed restoration design while also creating a stable and functional aquatic and terrestrial habitat. 5) Establish a native forested riparian plant community within a minimum of 50 feet from the proposed top of the bankfull channel along with the removal of exotic vegetation during FE-I]EcoEngineering A dwmon of The John R McAdams Company, Inc Restoration Plan • Duke University Water Reclamation Pond Stream Mitigation USGS HUC 03030002 - Durham County, North Carolina • October 2012 construction implementation and the elimination of current embankment maintenance practices. 3.0 Site Description 3.1 Project Location The proposed project site is located on the main campus of Duke University, in Durham, Durham County, North Carolina. Specifically, the proposed stream mitigation corridor starts just south of NC Hwy. 147, runs parallel to Campus Drive, crosses Campus Drive and ties back in to the receiving waters at Oregon Street (Figure 4). The proposed stream mitigation project is approximately 1.5 miles from the proposed stream impacts associated with the Duke Univeristy water reclamation pond. Duke University owns the entire corridor proposed for mitigation as well as parcels upstream and downstream from the proposed project. 3.2 Surface Waters The project site is located within the Cape Fear River Basin, USGS Hydrologic Unit 03030002 (USGS 1974), DWQ subbasin 03 -06 -05 and Local Watershed 14 -digit basin 03030002060110 (NCDENR, 2009). The unnamed tributary flows directly into Sandy Creek (DWQ stream index number of 16- 41 -1 -11) approximately 2.5 miles downstream of the project terminus. The North Carolina Division of Water Quality (NC DWQ) has not assigned stream index numbers to the unnamed tributaries of Sandy Creek located within the project extents. The current State classification of Sandy Creek and unnamed tributaries is Water Supply V (WS- V) and C and Nutrient Sensitive Waters (NSW) (NCDENR, 2011). Water Supply V waters are protected as water supplies which are generally upstream and draining to waters which are sources of water supply for drinking, culinary, or food processing purposes and are protected for aquatic life propagation and survival, fishing, wildlife, secondary recreation, and agriculture (NCDENR, 2011). Nutrient Sensitive Waters require control of pollutants (typically 85% of total suspended solids) for water quality benefits (NDENR, 2011). Analyzing the United States Geological Survey (USGS) Northwest and Southwest Durham, North Carolina 7.5 minute Quadrangle, the unnamed tributary to Sandy Creek within the project extent is a 2nd order stream based on stream channel characterizations from Leopold's Fluvial Processes in Geomorphology (Leopold, 1992). 4.0 General Watershed Description The drainage area of the unnamed tributary proposed for stream restoration is approximately 141 acres at the downstream end Figure 5). Based on our detailed watershed analysis approximately 27 percent (39 acres) of the watershed area is impervious. The subject property is located within the Piedmont Physiographic Province of North Carolina. A review of the Ecoregions of North Carolina and South Carolina (Griffith et al., 2002) shows the geology of the subject property is A]EcoEngineering A drvaan of The John R NIcAdz= Compmy, Inc. Restoration Plan • Duke University Water Reclamation Pond Stream Mitigation USGS HUC 03030002 • Durham County, North Carolina • October 2012 comprised of quaternary to tertiary red sandy loam to silty clay decomposition residuum, sandstone, conglomerate, mudstone, shale, coal, dikes, and sills within the Triassic Basin. There are no current agricultural croplands or activities within the watershed, however, there was stream channelization and relocation associated with the sanitary sewer line installation adjacent to the unnamed tributary. The historic development of institutional, commercial and industrial facilities in the drainage area of the UT to Sandy Creek has aggravated the existing erosion problem by increasing the runoff to the area. Based on site observations the degraded condition of the streams within the project area may be the result of historic channelization, periodic dredging, and past vegetation maintenance practices and to a lesser extent storm water runoff onto the site from the incremental increase in impervious surface associated with urbanization. Development in the Sandy Creek watershed threatens to worsen a sediment pollution problem that contributes to water quality issues in Jordan Lake. However, the proposed stream restoration corridor will tie into current and future stream restoration projects downstream of the same unnamed tributary, which will incorporate a more watershed based design approach. There is approximately 11,000 linear feet of stream restoration and enhancement projects sponsored by the Clean Water Management Trust Fund, in partnership with Duke University, downstream of the currently proposed stream restoration project. 4.1 Proposed Project and Stormwater Controls The North Carolina Department of Environment and Natural Resources — Division of Water Quality (DWQ) has recently issued a nutrient management strategy for the Jordan Lake watershed, known as the Jordan Lake Rules, designed to restore water quality in the lake by reducing the amount of pollution entering upstream. The City of Durham, is the local delegated authority for administering the Jordan Lake Rules for the region in which the Duke water reclamation pond project is located. Any new development within the Cape Fear River Basin (Jordan Lake Watershed) shall meet the applicable stormwater management requirements, per the Durham City Code, Chapter 70, Article X, Sections 70 -736 through 70 -749, effective July 6, 2012.: Specific requirements that will apply to this development include: - Removal of 85% of the Total Suspended Solids (TSS) in stormwater runoff from the site. - Removal of 40% of TN and TP in stormwater runoff on -site OR providing on -site removal of TN and TP such that export rates of TN do not exceed 6.0 lb/ac/yr for residential development and 10.0 lb/ac/yr for other development, whichever is most restrictive. - Removal of TN and TP through on -site or off -site measures such that cumulatively the export of TNfrom the site is equal to or less than 2.2 lb/ac/yr and export of TP from the site is equal to or less than 0.82 lb/ac/yr. - Detention such that the post - development flowrates in the 1, 2, and 10 year storm events do not exceed those computed for the pre- development condition. The City's Stormwater Services Division is to determine the need for detention based upon this analysis. Fjj]EcoEngineering A dmsmn orlbe John a. McAdzs Company, loe. Restoration Plan • Duke University Water Reclamation Pond Stream Mitigation USGS HUC 03030002 • Durham County, North Carolina • October 2012 There are currently untreated stormwater conveyances coming off of Campus Drive, and into our project which will mitigated with project design components described below. And although there is no impervious surface associated with our overall project there will likely be new development in the future that will be held to the stormwater management requirements above. However, to ensure long term stability of the restoration project, a wide floodplain will be provided along the majority of the project area to allow for increased flood frequency. With increased flow frequency from an increase in impervious surface, the channel morphology will adjust. The proper approach to accommodate urbanization in the watershed is to construct the channel to the current conditions design flow while allowing the entrenchment ratio of the new channel to be at least 10:1 ratio or greater if possible, instead of the minimum 2.2 to 1 ratio. Increased flow frequency associated with future land use changes will be conveyed by the floodplain and any adjustment to channel dimension will occur as floodplain aggradation instead of channel degradation. 5.0 Existing Stream Conditions The Unnamed Tributary to Sandy Creek is an incised stream characterized by highly eroded banks, lack of connection to the floodplain, and lack of bedform complexity. The stream is both laterally and vertically unstable. The pattern consists of straightened reaches along roads and sewer lines coupled with highly erosive, tightly meandering reaches. Many of the existing meanders have too small a meander length and radius of curvature, which could potentially lead to meanders cutting off and forming oxbows in the future. The changes in hydrology resulting from a highly urbanized watershed have resulted in a flashy system that ranges in flows from 0.1 ft3 /s during base flow to over 400 ft3 /s during a recorded storm event. The power of these flows has led to downcutting in the stream through the original channel substrate to a layer of Saprolite (weathered bedrock) along several portions of the stream. In these areas there is no channel bed material create riffle -pool features or support aquatic life. Several headcuts are located along the reach, the most significant being over a foot in height located at the sewer crossing in the Central reach of the project. The downcutting in the system has also led to an incised channel that has no access to a floodplain during storm events. This has resulted in bank erosion throughout the majority of the project reach. The eroded banks lack vegetation and root mass necessary for stabilizing the banks. A survey of existing conditions led the discovery of brick spoil piles located along the North and Central sections of the project. Erosion has led to the release of buried brick into the stream, creating riffles comprised of pulverized brick and native sand/gravel. The brick has also created weak points in the banks. See Appendix 4 for Existing Conditions Data. kjEcoEngineering A& moofThe John RMoak=Cowpony,hr. Restoration Plan • Duke University Water Reclamation Pond Stream Mitigation USGS HUC 03030002 • Durham County, North Carolina • October 2012 5.1 Existing Stream Geometry 5. 1.1 Stream Survey Methodology • one -foot topographic map of existing conditions was provided by Taylor Wiseman & Taylor. • supplemental survey was then completed with Taylor Wisemen & Taylor in conjunction with EcoEngineering, a division of the John R. McAdams Company Inc. that comprised of stream cross - sections, longitudinal profiles, bankfull indicators, and trees greater than eight inches diameter at breast height (DBH). This supplemental survey was used to evaluate existing morphological conditions. 5.1.2 Bankf ill Verification Field reconnaissance of the stream was performed prior to the commencement of the site survey. The purpose of field reconnaissance was to identify the bankfull elevation from existing indicators. In some reaches typical bankfull indicators were obscured and sporadic due to active bank erosion. Where occurring, scour lines, wrack lines, material deposition, and bankfull benches were used to identify bankfull in the field. After bankfull elevations were surveyed, existing cross - sections were entered into the hydraulic model HEC -RAS. Bankfull flowrates estimated from HEC -HMS 1 and 2 year storms and the North Carolina Piedmont Urban Regional Curve were put into the model. The Regional Curve flowrate had the closest match to the bankfull indicators found in the field and the existing top - of -bank (TOB) ranged between the HMS estimates for the 1.5 and 2 year storms. Table 2 below is a summary of the existing modeled hydrology. The reaches correspond to any flow change locations on the site as modeled by EcoEngineering in the HEC -HMS model. The final flowrates chosen for the cross - section design were 67cfs upstream of Campus Drive, and 102cfs downstream of Campus Drive. Table 2: HEC -RAS modeled exictino hvdrnlnQV anrd hankfnll indiramrc Reach DA (mil) DA (Acres) Field Est. Regional Curve 1- ear HEC -HMS 2-year 1.5-year 1 1 0 091 58.34 6660 67.85 13498 1 177.86 156.42 2A 1 0.138 88.29 99.00 88.08 163.91 214.53 189.22 P 0.202 129.40 9600 112.07 222.07 293.51 25779 32B 1 0.353 225.69 1 159.10 408.2 503.21 455.705 5.1.3 Stream Classification Stream channels were classified utilizing the stream classification system devised by Dave Rosgen ( Rosgen, 1996; Rosgen et al. 1998). This classification system utilizes several parameters based on field collected data and site observations, which collectively determines the stream type. The criteria utilized to determine stream type includes the stream slope, width -to- depth ratio, entrenchment ratio, sinuosity, and substrate class. The section of stream upstream of Campus Drive is classified as a C4, and the section downstream of Campus drive is classified as EcoEngineering A division of The John R McAdams Compm�; loc Restoration Plan • Duke University Water Reclamation Pond Stream Mitigation USGS HUC 03030002 • Durham County, North Carolina • October 2012 a B4c. Averaged entrenchment ratios allowed for the C classification, however, many individual cross - sections had entrenchment ratios approaching the threshold of 1.4 for an F channel. 5.1.4 Channel Classification Based on the completed channel survey and observations made during the site reconnaissance, it is evident that the stream has been functionally and hydrologically modified. The southern section was re- aligned and now follows the sewer line, including 90 degree turns. The riparian corridor has been encroached upon reducing the protection from stormwater outfalls. The channel is considered to be incised resulting in the concentration of flood flows within the confines of the channel that would otherwise be dispersed onto the floodplain. As a result of the incision, stream power increases beyond sustainable levels causing bed degradation and bank erosion (Ward and Trimble, 2004; Gordon et al., 1992). The channel is currently in Stage III of the Channel Evolution Model, which consists primarily of degradation or erosion of the bed. The channel is currently in transition from a C channel type to an F channel type. The F channel type consists of a severely incised channel that is completely separated from its floodplain and an entrenchment ratio less than 1.4. 5.2 Stream Substrate Bed material in the existing stream is dominated with fine to medium gravel. The D50 ranged from 4 to a maximum of 9.7 millimeters (mm). Therefore 50% of the bed material sampled consisted of particles that are classified as medium gravel or finer. A Bar sieve analysis was also done in order to estimate bedload and incorporate the information in the sediment transport modeling for the final design. The bar sample had average D50 ranging from 2.1 — 2.9 mm. Table 3 below provides a summary of stream substrate for the unnamed tributary to Sandy Creek. it Ault o. stream auDstrate I<rom rennie Uounts and Sieve Analysis Upstream Campus Downstream Campus Sample Drive Drive PC d5o (mm) D 50 97 4 PC d84 (mm) 25 27 (largest from subpave) (DI) 26 57 bar /subpave d5o (mm) Dhat 50 2.1 29 5.3 Soils The subject property is located within the Piedmont Physiographic Province of North Carolina. A review of the Ecoregions of North Carolina and South Carolina (Griffith et al., 2002) shows the geology of the subject property is comprised of quaternary to tertiary red sandy loam to silty clay decomposition residuum, sandstone, conglomerate, mudstone, shale, coal, dikes, and sills within the Triassic Basin. The Triassic Basin has unusual Piedmont geology of unmetamorphosed shales, sandstones, mudstone, silstones, and conglomerates. Soils tend to be FaIlEcoEngineering A divismo of the John R McAdams Company, hr Restoration Plan • Duke University Water Reclamation Pond Stream Mitigation USGS HUC 03030002 • Durham County, North Carolina • October 2012 clayey with low permeability, and streams will typically have low base flows. The clay has a high shrink -swell potential which could hinder construction. Figure 2 depicts the Soil Survey of Durham County, North Carolina (Soil Conservation Service, 1977) and Table 3 below lists the soils within 200 feet of UT to Sandy Creek within the project extents: Table 3. Soils within 200 feet of Unnamed Tributaa to Sandi Creek Map Unit Soil Name Percent Slope Comments Mtll Mayodan sandy loam 10 to 15 well drained, moderate permeability WsC White Store sandy loam 6 to 10 well drained, very slow permeability WE Mayodan sandy loam 15 to 25 well drained, moderate permeability MrD Mayodan — Urban land 10 to 15 well drained, moderate permeability complex Cc Chewacla and Cartecay 0 to 2 somewhat poorly drained, moderate permeability 5.4 Existing Plant Communities Distribution and composition of plant communities throughout the project site reflect landscape - level variations in topography, soils, hydrology, as well as past and present land use practices. Overall, approximately 90 percent of the project site is comprised of forested areas and would generally be characterized as a Dry Mesic Oak- Hickory Forest according to the North Carolina Natural Heritage Program (NHP) classification system (Schafale and Weakley, 1990). Tree species on the property include various oak species (Quercus spp.), American beech (Fagus grandifolia), tulip poplar (Liriodendron tulipifera), various hickory species (Carya spp.), loblolly pine (Pinus taeda), red maple (Acer rubrum), and sweet gum (Liquidambar styraciflua). Groundcover and secondary canopy layer species consist of common greenbriar (Smilax rotundifolia), giant cane (Arundinaria gigantea), sweet pepperbush (Clethera alnifolia), Virginia creeper (Parthenocissus quinquefolia), American holly (Ilex opaca), red cedar (Juniperus virginiana), various viburnum species (Viburnum spp.), Christmas fern (Polystichium acrostichoides), New York fern (Thelypteris noveboracensis), and netted chain fern (Woodwardia aerolata). More specifically, the plant community located along the unnamed tributary to Sandy Creek would be generally characterized as a Piedmont Bottomland Forest according to the NHP classification system. Typical species observed within this sub - community include tulip poplar, sweet gum, various oak species, river birch (Betula nigra), American elm (Ulmus americana), giant cane, Chinese privet, American holly, poison ivy (Toxicodendron radicans), Virginia creeper, common greenbriar, Indian wood -oats (Chasmanthium latifolium), Japanese stilt grass (Microstegium vimineum), and Christmas fern. Although the forested areas surrounding the unnamed tributary to Sandy Creek would be generally characterized as a Piedmont Bottomland Forest, these particular forested areas would be considered a very young Piedmont Bottomland Forest community due to the likely historic agriculture activities resulting in the clearing of the majority of the forest area. As a result there is an abundance of early succession species such as loblolly pine, sweet gum, and red maple. FEMIEcolEngineering A dWmon of7Le John R McAdam Company, Inc Restoration Plan - Duke University Water Reclamation Pond Stream Mitigation USGS HUC 03030002 - Durham County, North Carolina - October 2012 5.5 Threatened and Endangered Species Some populations of plants and animals are declining because of natural forces or their inability to coexist with human activity. Plants and animals with Endangered or Threatened status are protected under the Endangered Species Act (ESA) of 1973 (16 US 1531 et seq.). Table 4 lists species that, as of November 9, 2011, have Federal protection in Durham County according to the U.S. Fish and Wildlife Service (USFWS). Federal Species of Concern (FSC) are species not legally protected under the ESA and are not subject to any of its provisions, including Section 7, until they are formally proposed or listed as Endangered or Threatened. Table 5 lists FSC species for Durham County. Table 4. Federally Protected Species Scientific Name Common Name Federal Status Haliaeetus leucocephalus bald eagle BGPA Rhus michauxii Michaux's sum-'a-c­" umac _ Echinacea laevigata smooth coneflower E Notes: BGPA - Denotes a species declared recovered and is protected under the Bald and Golden Eagle Protection Act. E - Denotes a species in danger of extinction throughout all or a significant portion of its range. Table 5. Federal Species of Concern Scientific Name Common Name NC Status _Anguilla rostrata American eel SC Etheostoma collis lepidinion Carolina darter_ SC Noturus uriosus Carolina madtom _ T _L thrurus matutinus pinewoods shiner SC "�- Ambloplltes cTv &ns Roanoke bass SR __ _ ­ '. Fusconaia masoni Atlantic pigtoe E Lasmigona subviridis green floater _ E _ SomatgUrus virginicus panhandle pebblesnail SR Gomphus septima Septima's clubtail SR Lampsilis cariosa yellow lampmmussel E Juglans cinerea butternut SC Monotropsis odorata sweet pinesap SR -V Del phinium exaltatum tall larkspur E Notes: E - Denotes a species whose continued existence as a viable component of the state's flora or fauna is determined to be in jeopardy. E -SC- Denotes a species whose continued existence as a viable component of the state's flora or fauna is determined to be in jeopardy and needs monitoring. T - Denotes a species which is likely to become an endangered species within the foreseeable future throughout all or a significant portion of its range. SIC- Denotes a Special Concern species which requires monitoring but may be taken or collected and sold under regulations adopted under the provisions of Article 25 of Chapter 113 of the General Statutes (animals) and the Plant Protection and Conservation Act (plants). Only propagated material may be sold of Special Concern plants that are also listed as Threatened or Endangered. SR- Denotes a Significantly Rare species not listed as "E ", "T ", or "SC ", but which exists in the state in small numbers and has been determined to need monitoring. SR -V - Denotes a Special Concern Vulnerable which are species that occurred in North Carolina at one time, but for which all known populations are currently considered to be either historical or extirpated [JEcoEngineering A dmisim of lbc John R. McAdam Company, Inc Restoration Plan • Duke University Water Reclamation Pond Stream Mitigation USGS HUC 03030002 • Durham County, North Carolina • October 2012 EcoEngineering conducted field surveys by walking transects within the project site. The objective of the field surveys was to determine the presence of Federally Threatened or Endangered Species on the property. There were no Federally Threatened or Endangered species observed during the field surveys. EcoEngineering coordinated with the U.S. Fish and Wildlife Service ( USFWS) and a response from USFWS was reeived on February 19, 2010 explaining that the proposed action is not likely to adversely affect any federally - listed endangered or threatened species, their formally designated critical habitat, or species currently proposed for listing under the Endangered Species Act (Appendix 3). Prior to conducting field surveys, EcoEngineering reviewed the North Carolina Department of Environment and Natural Resources - Natural Heritage Program (NHP) database of potentially rare and protected species and unique habitats within the project site and coordinated with NHP in a letter dated November 7, 2011. Based on the research, NHP does not have any records of rare species, significant natural communities, or conservation/managed areas located at the project site. NHP has ten (10) element occurrences listed within two miles of the project site, and they are as follows: Rota's feather moss (Brachythecium rotaeanum), variable fork moss (Dicranella varia), showy aster (Eurybia spectabilis), four -toed salamander (Hemidactylium scutatum), crested coralroot (Hexalectris spicata — 2 occurrences), wiry panic grass (Panicum flexile — 2 occurrences), liverwort (Plagiochila ludoviciana), Appalachian golden - banner (Thermopsis mollis). Based on the field surveys conducted by EcoEngineering, the elemental occurrences were not observed on the property. In a letter dated January 20, 2010 (Appendix 3), NHP responded with the following statements: "The Natural Heritage Program has no record of rare species, significant natural communities, significant natural heritage areas, or conservation /managed areas at the site or within a mile of the project area." Coordination with the North Carolina Wildlife Resources Commission (WRC) in a letter dated November 7, 2011. In a letter dated February 12, 2010 (Appendix 3), WRC responded with the following statements: "There are records no records for threatened and endangered species in Sandy Creek or its tributaries." 5.6 Cultural Resources A review of the N.C. State Historic Preservation Office (SHPO) HPOWEB GIS Service database (http: / /gis.ncdcr.gov/hpoweb/) was conducted. According to their website, HPOWEB "has current location data for all National Register listings, most Study List entries and Determinations of Eligibility, and surveyed rural properties for many counties ". Based on the review, no listings are located within the proposed project area. Correspondence was received on February 9, 2012 and July 13, 2012 from SHPO explaining that they are aware of no historic resources which would be affected by the project (Appendix 3). 6.0 Reference Reaches The driving factor for the design of this restoration project is the flashy hydrology resulting from a highly urbanized watershed upstream. Data collected for the reference reach was not used as an exact template for the restored stream but as a vital part of the design process. This channel was EcoEngineering Adm moflbe John RMcAdnnCaopmy,1w, Restoration Plan - Duke University Water Reclamation Pond Stream Mitigation USGS HUC 03030002 - Durham County, North Carolina - October 2012 chosen because of the similarity to existing stream reaches. Stable features in the existing channel, as well as existing bankfull geometry were also used in the design process. 6.1 Terrible Creek Terrible Creek is located approximately 1.3 miles north east of the downtown Fuquay - Varina, North Carolina within Wake County. More specifically, Terrible Creek crosses Sunset Lake Road approximately 1.0 mile north of the intersection of Sunset Lake Road and North Main Street located within Fuquay- Varina. Based on the Fuquay - Varina 7.5- minute topographic quadrangle Terrible Creek is a 1St order stream and the reference survey was collected at a point at which the drainage area was calculated to be approximately 2.19 square miles. The headwaters of the stream originate approximately 0.1 mile east of Broad Street (State Route 55), which is predominately characterized as commercial and residential. As the creek flows east towards Sunset Lake Road the watershed becomes forested with the exception of residential areas located to the north and south which are separated from Terrible Creek by an approximately 1,200 foot riparian buffer. Stream data was collected in June of 2009. Information gathered included pattern and longitudinal profile, cross - sectional area, slope, and pebble count data. Based on the data collected, Terrible Creek was determined to be a C4 channel type ( Rosgen Stream Classification). The channel was determined to have a bankfull cross - sectional area of 24.9 square feet, a width of 15.6 feet, and a mean depth of 1.6 feet. The channel is located in a Type VIII Valley, which is characterized as a wide alluvial valley with a low slope gradient. In addition to Terrible Creek, typical dimensionless ratios for Rosgen type B channels were used in sections of the streams where a wide floodplain was unable to be established. In those instances the entrenchment ratio for a B channel was used. 7.0 Stream Channel Design 7.1 Natural Channel Design The restoration design for the unnamed tributary to Sandy Creek is based on natural channel design principles and techniques utilizing reference reach data sets, the existing conditions survey data collected from the restoration site, and hydrologic and hydraulic modeling of existing conditions. Additional reference material used to develop the design includes the North Carolina Urban Piedmont Regional Curve (Harmon et al. 1999; SRI 2000) and Terrible Creek reference reach data (collected by EcoEngineering in 2009). Design parameters were also developed based on past professional experience and design constraints at the site. The proposed stream design will restore the existing incised and degraded channel to a naturally meandering, ecologically functional C4 type stream channel. With the bed elevation being constrained by culverts upstream and downstream of each reach (North, South, and Central), raising the bed to connect to the existing floodplain was not an option. Instead, a nested floodplain will be established at bankfull elevation creating a terraced landscape. This will allow energy dissipation during storm events and ecological connectivity. [jEcoEngineering A drvisvm orThe John R. McAdams Compmy, hr Restoration Plan • Duke University Water Reclamation Pond Stream Mitigation USGS HUC 03030002 • Durham County, North Carolina • October 2012 This restoration is considered to be a Rosgen Priority I and Priority II type of channel restoration. Sections of the design are designated Priority II type stream restoration since a bankfull bench (nested floodplain) will be constructed adjacent to the proposed channel alignment and will be located at a lower elevation relative to the existing floodplain. The existing and proposed morphological characteristics are depicted in Table 6 on the following pages. Due to an increase in flow -rate above and below campus drive, the morphology tables have been separated into two sections. The restoration design will result in a riffle -pool channel profile that will be reinforced utilizing in- stream structures such as wood toe, rock -and -rill riffles (a combination of logs and rocks), boulder clusters, and log vanes. The new channel, floodplain and any disturbed areas within the conservation easement will subsequently be vegetated with transplants, bare -root seedlings, live stakes and seeded with temporary and permanent ground cover. Erosion control matting, temporary /permanent seeding, and live stakes will be applied to the channel embankment immediately following completion of each channel segment providing surface protection of the banks. See Appendix 4 for the Morphological Data Table. 7.2 Dimension The design bankfull cross - section areas selected for UT Sandy are 14.6 ft north of Campus Drive and 18.9 ft south of Campus drive. The proposed with is 16 ft upstream and 18 ft downstream. Average bankfull depth is approximately 1 ft throughout the length of the project. The channel dimensions were determined utilizing the average measured width of the existing stream, the North Carolina regional curve, reference reach data, existing site constraints and the required shear stress to move the D84. The proposed dimensions result in a Rosgen "C" channel type. 7.3 Pattern The existing pattern is characterized by fairly straight reaches and reaches with tight, unstable meanders. This results in a sinuosity that is deceptive (1.3- 1.31), as it does not highlight this inconsistency in pattern. The proposed channel has integrated a meander pattern throughout the length of the project to the maximum extent possible based on existing site constraints. The design sinuosity ranges from 1.2 -1.29. The belt width, radius of curvature, and meander length were established based on stable meanders found in the existing stream along with reference reach dimensionless ratios. Incorporating a meander pattern throughout the length of the project will reduce channel shear stress resulting in less erosion, and provide a stable and diversified 'aquatic habitat. See 24 x 36" Design Detail Sheets enclosed. 7.4 Bed Form Bed form along the project stream reach is in poor and unstable condition, primarily due to the incised and entrenched nature of the channel. Several sections of the existing reach have incised down to Saprolite (weathered bedrock) resulting in a lack of diversity in bedform. The [AEcoEngineering A d'nwon or7he Jahn R McAdam Company, for Restoration Plan • Duke University Water Reclamation Pond Stream Mitigation USGS HUC 03030002 • Durham County, North Carolina • October 2012 restoration design incorporates riffles, runs, pools, and glides into the longitudinal profile in order to reestablish this diversity. Riffles will be located along straight segments of the channel, runs connect the riffles to the pools which are located along the outside meander bends and glides connect the pool to the riffle. Riffles are designed to be approximately half the depth of pools. The surveyed as -built profile may differ slightly because of unforeseen site constraints, limitations that may be discovered during construction (i.e. bedrock), or slight shifts in the proposed alignment. These bed features may be reinforced with in- stream structures to insure bed stability and to maintain bed form. Structures may be omitted or added during construction due to unknown site conditions or unconsolidated soils. At times, the designer may not install structures that appear on the design sheets. This action is reserved for instances where the damage and potential instability caused by installation is greater than the benefit installing a structure. Structure placement is typically field adjusted to conform to the constructed stream alignment and profile. Large Design Detail Sheets enclosed within this report contains detailed plan drawings of the proposed stream's longitudinal profile. 7.5 Riparian Area A riparian buffer area will be established immediately adjacent to the restored stream channel. Typical width will be no less than 50 feet on either side of the bankfull elevation of each stream bank. These areas will be planted with the appropriate native riparian vegetation and will provide channel stability, flood attenuation and a vegetated buffer that will intercept overland stormwater. Species will consist primarily of native trees and small shrubs of the Piedmont. Refer to Section 9.0 Riparian Planting Plan for more details. 7.6 Stormwater There are several stormwater outlet pipes discharging into the existing riparian buffer along Campus Drive and Swift Avenue. While enhancement for these outlets is not a regulatory requirement, it is felt that incorporation of said enhancement will greatly benefit the overall impact of the project on the ecosystem. Design of enhancement areas will be provided in the finalized construction documents and may include slowing discharge during storms, allowing for attenuation of flow in vernal pools, and providing flow access to the floodplain. 7.7 Stream Structures To provide grade control following construction of the channel, cross -vanes will be used at the entrance and exit of each culvert. This will concentrate flow into the center of the stream providing protection to the culvert structure. Rock and roll riffles (a combination of log and rock) will be used for energy dissipation, flow variation and grade control at certain riffles. Log vanes will be used on meanders with a small radius of curvature in order to angle flow towards the center of the channel, lowering the shear stress on outer meanders and reducing erosion potential. Toe Wood will be used along some pools to provide habitat and bank protection. Rock clusters will be used in riffles to provide bed stability and flow variation where there is a lack of appropriate channel material and a high riffle slope. AEcoEngineedng A dwn= ofTbr Jobe R MrAdmn Compmy, bir_ Restoration Plan • Duke University Water Reclamation Pond Stream Mitigation USGS HUC 03030002 - Durham County, North Carolina - October 2012 All wooden structures will use trees taken down during the construction of the proposed channel. Rock material, if not recovered on site during construction, will be acquired from a local quarry. 7.7.1 Rock - and -Roll Riffle A Rock - and -Roll riffle (developed by Wildlands Engineering) uses logs imbedded into the stream that protrude slightly in order to provide grade control and flow variation. The logs are keyed into the bank and set at different angles along the length of the riffle. Large rocks are added into the structure to apply additional flow variation and habitat within the riffle. The purpose of the structure is to create a feature that mimics a natural riffle better than traditional constructed riffles used in the past. 7.7.2 Toe Wood The purpose of toe wood is to stabilize streambanks, provide a natural appearance, eliminate the need for rock toe, and have a cost effective solution with a lower risk. The Toe -wood incorporates native material harvested during channel construction. Harvested trees are positioned on the lower third of the bank to ensure it is submerged under water year round to prevent rot. Cuttings, sod, and live staking are used to cover the toe wood up to the bankfull stage. The resulting structure provides protection from streambank erosion and habitat for aquatic life. 7.7.3 Rock Clusters Rock/boulder clusters are used in riffles to provide habitat, stability and flow variation. Rocks are sized so as to not be moved by 10 year storm events and are placed sporadically throughout the riffle. This provides rest areas for fish traveling upstream, habitat for macroinvertibrates, and increases the channel roughness so that flow is slowed during storm events. 7.7.4 Loa Vane and Loa Cross -Vanes The purpose of these log structures is to concentrate streamflow into the thalweg of the stream and away from streambanks. This reduces shear stress and erosion on the streambanks.Log vanes are used along the channel meanders, and cross -vanes are used before and after culverts along the stream. 8.0 Riparian Planting Plan The proposed riparian planting plan was developed by integrating the native plant species observed on site, procedures outlined in Guidelines for Riparian Buffer Restoration (NCEEP 2004), along with selected species known to inhabit the Piedmont Bottomland Forest community type as described in Classification of the Natural Communities of North Carolina (Schafale and Weakley, 1990) and to institute species diversity. According to this publication, "Very few bottomlands of any significant size remain. While many bottomlands exist as successional forest grown up in abandoned fields, intact Bottomland Forests are among the rarest of communities in North Carolina." Most of the bottomlands that have been cleared or logged in the past are dominated by loblolly pine, red maple, sweet gum, or sycamore." The majority of the restored riparian zone will be located within the created bankfull bench and toe slope areas. This area will be planted with bare root seedlings consisting of bottomland [JEcoEngineering A division ofTbe John R McAdams Company, Inc Restoration Plan • Duke University Water Reclamation Pond Stream Mitigation USGS HUC 03030002 • Durham County, North Carolina • October 2012 hardwood species as outlined in Schafale and Weakley. Native trees and shrubs that are currently located within the channel clearing and excavation limits will be removed with as much of the root ball intact and transplanted adjacent to the restored creek channel or bankfull bench when possible. 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 channel. 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). Plant species that will be utilized within the restoration site are listed in Table 7, presented in this section. The restored active channel will be planted with the appropriate channel bank species in the form of live stakes, bare -root seedlings, and transplants consisting primarily of black willow (Salix nigm), and silky dogwood (Corpus amomum). If quantities from on site sources are not plentiful, the live stakes will be supplemented by locally identified plant sources (i.e. existing power line right -of -ways (ROWs), adjacent properties, etc.) or purchased from locally reputable nurseries. Black willow will not consist of more than 40 percent of the stream bank plantings. The planting plan will consist of individual tree species as listed in the Table 7, below. Within riparian buffer areas which are considered maintained/disturbed and cultivated land, the goal is to plant 436 to 681 trees per acre, with an approximate 8 -foot to 10 -foot spacing. Plant composition will consist of at a minimum at least six (6) of the tree species. Planting is required such that a density sufficient to provide an average of 320 trees per acre following five years of successful monitoring at the Site. [JEcoEngineering A dnrision oflbe John R McAdams Company, Inc Restoration Plan • Duke University Water Reclamation Pond Stream Mitigation USGS HUC 03030002 • Durham County, North Carolina • October 2012 Table 7. Plant List Scientific Name Common Name Trees Fraxinus pennsylvanica green ash Platanus occidentalis American sycamore Quercus a oda the bark oak Betula nigra river birch Quercus lauri olia laurel oak Quercuslyrata overcup oak Quercus michauxii swamp chestnut oak Quercus phellos willow oak Quercus alba white oak Quercus falcata southern red oak Quercus nigra water oak Acer barbatum southern sugar maple Ulmus americana American elm Fa us grandifolia American beech Liriodendron tuli ifera tulip poplar Small Trees and Shrubs Cornus orida flowering dogwood Alnus serrulata tag alder M rica ceri era wax myrtle Car inus caroliniana ironwood Magnolia vir iniana sweet bay Aronia arbuti olia red chokeberry Ilex verticillata winterberr Ce halanthus occidentalis buttonbush Lindera benzoin s icebush Leucothoe racemosa fetterbush Aesculus sylvatica painted buckeye Asimina triloba pawpaw Ilex o aca American holly apccics composition may be aajustea based on local availability. Temporary and permanent seed will be applied simultaneously to the disturbed areas and channel embankments. Temporary seed will provide cover until the permanent seed becomes established. Temporary cover will consist of millet (Ecbinocbloa crusgalb), rye grain (Secale cereale), and crimson clover (Trifolium incarnatum). Permanent ground cover will consist of switchgrass (Panicum virgatum), deertongue (Panicum clandestinman), black -eyed susan (Rudbeckia birta), riverbank wildrye (Elymus riparius), and silky dogwood. Silky dogwood will only be applied along the channel embankments. 9.0 Monitoring Plan The monitoring plan to evaluate the success of the Site is based the U.S. Army Corps of Engineers (USACE) Stream Mitigation Guidelines (April, 2003) and the North Carolina Ecosystem Enhancement Program (NCEEP) Monitoring Requirements and Performance FEg-]EcoEngineering A dm m oflbe John R McAdams Cmnpaoy, he Restoration Plan • Duke University Water Reclamation Pond Stream Mitigation USGS HUC 03030002 • Durham County, North Carolina • October 2012 Standards for Stream and /or Wetland Mitigation (November, 2011). Monitoring of the Site will occur annually for seven (7) full years. A monitoring report will be generated by December 31St of each monitoring year documenting the activities at the Site. 9.1 Stream Monitoring Stream geometry will be considered successful if the geometry, profile, and sinuosity are stable or reach a dynamic equilibrium. It is expected that there will be minimal changes in the designed cross sections, profile, and/or substrate composition. Changes that may occur during the monitoring period will be evaluated to determine if they represent a movement toward a more unstable condition (e.g. down cutting, or bank erosion) or are minor changes that represent an increase in stability (e.g. settling, vegetative changes, coarsening of bed material, etc.). Deviation from the design ratios will not necessarily denote failure as it is possible to maintain stability and not stay within the design geometry. 9.1.1 Bankfull Events The occurrence of bankfull events within the monitoring period will be documented by the use of a crest gage and photographs. A crest gage will be installed which will record the highest watermark between site visits. The crest gage will be checked each time there is a site visit to determine if a bankfull event has occurred. Photographs will be used to document the occurrences of debris lines and sediment deposition on the floodplain during monitoring site visits. Monitoring years must cover at least two bankfull events. If by year seven there has only been one event, monitoring will continue until a second bankfull event occurs. 9.1.2 Longitudinal Profile A longitudinal profile of the stream will be surveyed after construction of the Site as part of the As -built surveys. Measurements will include the thalweg, water surface, bankfull, and top of bank at the head of each feature (e.g., riffle, pool, etc.) and at the maximum pool depth. The survey will be tied to a permanent benchmark to facilitate comparison of data year to year. Reference stakes (containing a notation of the stream station) will be installed every 100ft along the stream length in the riparian buffer. Longitudinal profiles are only required in years 1 -7 if monitoring efforts indicate significant bank or bed instability. 9.1.3 Cross Sections A total of ten (10) cross sections will be installed after construction of the Site and will be surveyed as part of the As -built survey and during Monitoring Years 1, 2, 3, 5, and 7. Each cross section will be marked on both banks with permanent pins /monuments to establish the exact transect used. A common benchmark will be used for the cross sections and it will be consistently used to facilitate easy comparison of year to year data. The cross section survey will include points measured at all breaks in slope, including top of bank, bankfull, inner berm, edge of water, and thalweg, if the features are present. There will be five (5) riffle cross sections and each be classified using the Rosgen Stream Classification System. Pebble counts shall be completed at each of the riffle cross - sections. Bank pins will be installed at the five (5) cross - sections located at meander bends. Bank pins may be rebar, chain, or wire that is driven horizontally in the bank face and must be a minimum of three (3) ft. long. Bank pins should be installed at an interval of one (1) pin for every two (2) feet of bank height with the lowest pin above the normal pool line. Bank pins will be installed at the cross - section (located at the maximum pool location), at the first third of the meander bend, [JEcoEngineering A dmsnm of The Jahn R McAdams Company, luc. Restoration Plan • Duke University Water Reclamation Pond Stream Mitigation USGS HUC 03030002 • Durham County, North Carolina • October 2012 and last third of the meander bend. Exposed length of pins shall be measured and recorded each monitoring year to track lateral movement of the stream. 9.1.4 Photograph Stations and Visual Monitoring Photographs shall be taken at each cross - section with one photograph facing each bank. Additionally 12 permanent photo stations will be located across the site. Pictures shall be taken annually at each photostation in the north, south, east, and west directions. Visual monitoring shall take place along all streams twice annually to document any lateral movement, structure failure, aggradation/degradation, invasive species, headcuts, or beaver activity. Visual monitoring will also be required in the buffer to document any excessive mortality, low stem density, encroachements, or invasive species. 9.2 Vegetation Planting Monitoring The Site will contain six (6) vegetative monitoring plots (Figure A 11), which will be monitored in general accordance with the CVS -EEP Protocol for Recording Vegetation (CVS -EEP, v4.2). Ten (10) by ten (10) 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. The plant species, density, survival rates, and the cause of mortality, if identifiable, will be recorded within each plot. A minimum of 180 days between March 1 and November 30 must separate initial planting and monitoring of year one. Vegetation plots will be sampled and reported in years 1, 2, 3, 5, and 7. The primary focus of the vegetative monitoring will be solely on the tree stratum, although shrub and herbaceous species encountered may also be recorded. 9.3 Long — Term Preservation Mechanism The long -term preservation mechanism will be in the form of a Conservation Easement in perpetuity. The Durham County Soil and Water Conservation District has agreed to hold the Conservation Easement to provide, third -party, long -term assurance to the success of the project. A Conservation Easement document agreed to by all parties will be provided once the final mitigation plan is approved. 10.0 Success Criteria Success criteria will determine if the mitigation project is meeting its prescribed goals as listed in Section 3.0. A determination will be made regarding the success of the project following the collection and evaluation of ecological and physical monitoring data, photographs, site observations, and the performance of the streams during storm events. Monitoring components that will be evaluated include vegetation survival, channel bed and bank stability, and in- stream structure performance. 10.1 Stream Success Criteria Channel stability will be reflected in the surveyed permanent cross - sections, longitudinal profile, evaluation of bank stability and cover, evaluation of in- stream structure performance and to a lesser degree pebble counts compared to the as -built and any previously collected monitoring data. The general trend should reflect a stable or slightly decreasing riffle cross - sectional area whereas pools may increase and yet be considered relatively stable. The longitudinal profile will FFfEcoEngineering A drawn ofTheJahnRMcAdwnCompmy,Inc. Restoration Plan • Duke University Water Reclamation Pond Stream Mitigation USGS HUC 03030002 • Durham County, North Carolina • October 2012 typically adjust depending on the frequency of bankfull or greater storm events. Normally the constructed channel profile will adjust (especially in a sand dominated bed) but it will need to function without significant degradation (bed scour), aggradation (mid - channel bars), or bank erosion. The Bank Height Ratio (BHR) as determined by cross - section surveys, shall not exceed 1.2 and the Entrenchment Ratio shall be no less than 2.2 within the restored reaches. The stream shall remain stable over seven years, through two bankfull events, as indicated by visual surveys, cross - sections, and bank pins. If monitoring (including- vegetation) demonstrates success by year five (5) a proposal can be issued by the Owner to terminate monitoring of the site. 10.2 Vegetation Planting Success Criteria Vegetation planting success criteria will be based on the survival of a minimum density of 320 trees per acre (to include both planted and existing trees) after three (3) years of monitoring. After five (5) years of monitoring, the density shall be no less than 260 trees per acre (to include both planted and existing trees). After seven (7) years of monitoring, the density shall be no less than 210 trees per acre (to include both planted and existing trees). In addition, planted vegetation must average 10 feet in height in each plot at year seven (7). If the height standard is met and the stem density is trending toward success after five (5) years of monitoring, monitoring of vegetation on the site may be terminated provided written approval is provided by the USACE and NCDWQ. [JEcoEngineedng A dnmm of The John R. McAdm Compmy, Inc Restoration Plan • Duke University Water Reclamation Pond Stream Mitigation USGS HUC 03030002 • Durham County, North Carolina - October 2012 11.0 References American Society of Civil Engineers (ASCE). 1975. Sedimentation Engineering, Manuals and Reports on Engineering Practice No. 54, Vito A. Vanoni, ed., New York. Andrews, E.D. 1983. Entrainment Of Gravel From Naturally Sorted Riverbed Material. Geological Society of America Bulletin 94, pp. 1225 -1231. Gordon, N.D., T.A. McMahon, and B.L. Finlayson. 1992. Stream Hydrology. John Wiley & Sons Ltd. West Sussex, England. Griffith, G. and Omernik, J., 2002. Draft Level III and IV Ecoregions of North Carolina. USAEPA, USDA -NRCS, and NCDENR. Harmon, W.A., G.D. Jennings, J.M. Patterson, D.R. Clinton, L.O. Slate, A.G. Jessup, J.R. Everhart, R.E. Smith. 1999. Bankf ill Hydraulic Geometry Relationships for North Carolina Streams. http: / /www5.bae.ncsu.edu/ programs / extension /wqg/sri /rural _pied _paper.html Hupp, C.R. and A. Simon. 1986. Vegetation and bank -slope development. Proceedings of the Fourth Federal Interagency Sedimentation Conference 4:83 -92. Leopold, L.B., M.G. Wolman, and J.P. Miller. 1992. Fluvial Processes in Geomorphology. Dover Publications, Inc. New York, NY. Leopold, L.B., 1994. A View of the River. Harvard University Press, Cambridge, MA. NC Department of Environment and Natural Resources. November 2011. Surface Water Classifications. http: / /portal.ncdenr.or /web /wq/ps /csu/classifications NC Department of Environment and Natural Resources. July 2007. Stormwater Best Management Practice Manual. NC Department of Environment and Natural Resources Ecosystem Enhancement Program. October 2004. Guidelines for Riparian Buffer Restoration. NC Department of Environment and Natural Resources. 2011 -2012. Jordan Lake Water Nutrient Management Strategy Rosgen, D.L. 1996. Applied River Morphology. Wildland Hydrology Books, Pagosa Springs, Colorado. Rosgen, D.L. and Silvey, Lee. 1998. Field Guide for Stream Classification. Wildland Hydrology. PlEcoEngineering A &view of The John R Mum Compmy. 1w Restoration Plan • Duke University Water Reclamation Pond Stream Mitigation USGS HUC 03030002 • Durham County, North Carolina • October 2012 Rosgen, D.L. 2001. The Cross -Vane, W -Weir, and J -Hook Vane Structures... Their Description, Design and Applications for Stream Stabilization and River Restoration. 2001 ASCE Conference Proceedings. Reno, NV. Schafale, Michael P. and Weakley, Alan S. 1990. Classification of the Natural Communities of North Carolina Third Approximation. NC Department of Environment, Health, and Natural Resources. Soil Conservation Service (SCS), 1977. Soil Survey of Durham County, North Carolina. USDA. Stream Restoration Institute (SRI). 2000. NC Rural Piedmont Regional Curve. http: / /www.bae.ncsu. edu/ programs / extension /wqg /sri /rural _pied_regcurves.html United States Geological Survey. 1974. North Carolina Hydrologic Unit Map. USDA Chapter 11, Rosgen Geomorphic Channel Design, Part 654 Stream Restoration Design Issued August 2007. Ward, Andy D., Stanley W. Trimble. 2004. Environmental Hydrology, Second Edition. Lewis Publishers. Wildland Hydrology. 1998. The Reference Reach Field Book. Wildland Hydrology. [jEcoEngineering A dirnaon orThe John R McAdams Company, Inc aen; - • qg N� yi��• Ste, NO' ' F J� •�•,3 :• �R£iN' � �' if 'Jtf.,. 1, bstation 22 wa qw r ' ,• tl , 3yy .t� f. %.: t�. -..try I. : • K ■ ' , YEA ld • - yr l.- z 14, 1 444 .STREAM ' RESTORATION CORRIDOR y♦��,� �\ `r�i y1 1 j . 1 4 1,4 ve lin E WO r• U565 QUADRANGLE NORTHWE5T AND 5OUfHkE5T DURHAM, NG; Ig72 FHOTOREV15EV ma-7; 36.003118 ■N, - 18.c14cicf23•W FIGURE 1. NORTHWE r & SOUTIEWWr DURHAM, NC USGS QUADS � rxor�cr no. DKU -08010 ■ Fn�`a DKU0 —080 0 DUKE WATER EcoEngineering ® A &Owim of T4■ lcm A m@A REC 'ION POND m'. 5 1 " = 1, 000' ">Zxs • "' • 'xraram • oeL CH S�1ZEAM PES'PORATION CORRIDOR M6IZ RM - n nen: 12 -14 -11 = *ROM r., M, a�,m as ?7713 DURHAM, NORTH CAROIDLA W734 -Mg. gym • s Ai i Ur BUS W c MrC� Wwc Ur sE MrD STREAM RESTORATION CORRIDOR Ur WSE Gu wss r aler ,F -' Ws8 MfM VbsB WsC /'N,C � 1 Mfr c� Mf8 Mf W wC: Mfb Wss i W, WwE / SC WwC U50A -5G5 501L 5UR1/EY OF DURHAM COUNTY, NORTH CAROLINA; 5HEET 21; Ic10 F1 2. F PxoraCT no. DKU DUKE WATER AEcoEngineering DKU0801X.DW 1X.DWG 1ENUOU'dClAMATION POND A���'�RMoAd ®Stns. 1" = 1,000' STREAM RESMRAMON CORRIDOR t mss t� . clista�arra DURH M, NORTH CAROLM MT�� '*"' �,V� ft.: s -M r� . 4* ,�'. ,' -, �► -.-'- -, ft ; ,�. � �. "� oU %,/ SMITH WAREHOUSE - L _ MAINjGARDENS f� �F T t � E 0 ;< POND - + ti N ' : i> PROPOSED CAMPUS DRIVE Al T WATER REAM MITIGATION / ,Y REUSE POND # 1 y - ► PROPOSED- PROPOSED a c, 1 _ Y r> k FISH POND 4 w #r; :� CAMPUS DRIVE -� SOUTH LAWN t tf F POND �. �• u ® �� � �-- � - _ - � �. j Mf �., PLIS DELTA SMART HOU R — — r_� f B I O R ET E N T I O N , ARE . BM F 4 # C TO BE RESTORED h WITH REALIGNMEN _. OF CAMPUS DRIVET °r ` i cl 3 S - s Ss - P g c _ z- _' s j. PROPOSED SWAMP PHASE V WETLAND, DESIGNED AND , SWAMP V. CONSTRUCTION FUNDING , APPROVED % SWAMP III - - r..:., SWAMP STREAM ` WETLAND.' SWAMP STREAM _ ,i F CURE E R S I T Y t . #3 OSED RESTORATION s`f (EXISTING AND FUTURE). ( 3 . PROP WATER RECLAMATION AND :, STREAM MITIGATION EXHIBIT R � SWAMP I y SWAMP II —�� � �� $+ `.x :�' '; ' � — �' ¢ � PROPOSED STREAM RESTORATION (POND) PROPOSED STREAM RESTORATION: DESIGNED, WAITING ON CONSTRUCTION e 3` 4 j" { }' FUNDING (DR. RICHARDSON) ke wl SWAMP WETLANDx t- .A may: = %, FU " x W ^ .i EXISTING STREAM RESTORATION IMPOUNDMENT �' .. (DR. RICHARDSON) IA , All PROPOSED STREAM RESTORATION: s • € ° DESIGNED, CITY PROPERTY * t'a < �t ' (DR. RICHARDSON) r t yye , x i k R „ .t 4 PROPOSED DRAINAGE IMPROVEMENTS/ SWAN P 1 V g'` MODIFICATIONS ALONG OREGON ST. JANUARY. 2oi2 SWAMP IV B 2 4 �\ y t a - [4EcoEngineering ' ,3" RTH � Inc. A division of The John R. WAdarnn Cornpany, tr, x_ UPPER GARDENS POND - , ,r I ' J ., f jt. col R: .z M MAIN GARDENS ' A , 1 POND ,. ' tr < - O a°8 a : P. = o ' SMITH WAREHOUSE PROPOSED CAMPUS DRIVE — , k WETLAND BMP" STREAM MITIGATION _ 3. R 4v. { rk w .. f �� ,., #, 's PROPOSED -CAMPUS DRIVE t a ALIGNMENT IvL:._ �O s1m k DELTA SMART HOUSE--// BIORETENTION CAMPUS AREA BMP 4 TO S DIVE n TO BE RESTORED ` WITH REALIGNMENT -- � r *- OF CAMPUS DRIVE `' , PROPOSED CAMPUS DRIVE a DIKE Un IV R u EP STREAM MITIGATION ` Y SITy F,OAD+ FIGURE 3 : INSET I a PROPOSED STREAM RESTORATION (POND) PROPOSED STREAM RESTORATION: 3 5- Y S T r CONSTRUCTION DES!GNEC, WAI. IN.. ON CONS b_, FUNDING (DR. RICHARDSON) xyy ; x EXISTING STREAM RESTORATION ' s T - (DR. RICHARDSON) }k x. r , D PROPOSE EDDC IT PROPERTORATION. . �. (DR. RICHARDSON) ke 3 PROPOSED DRAINAGE IMPROVEMENTS/ 4 JANUARY. ODIFICATIONS ALONG OREGON ST � y _ L � t C 7t 640 i [4EcoEngineering - l og.. a }' d- A division of'The John R. NlcAc4�nin Company, Inc, NOS a A O z A CA F" d O x 0 z naoaect nn. DKU - 0801 0 CAMPUS DRIVE STREAM MITIGATION PLAN EcoEngineerind ettenee�t: WEST NIT. EXHIBITS FIGURE 4: CONCEPTUAL CAMPUS DRIVE MITIGATION PLAN P SCALE: 1 N =,200' can ne�re: 06 -19 -2012 DURHAM, NORTH CAROLINA M" P b" W War„" irk R.2 P a WA Fr i 1 !!.n!1�" .��� F :�1• � �' .rift r 77 — F�� r i .a_ PR°ACT Y0 DKU -08010 t�Tri Ax�: EXHIBITS scats: NTS DAT 10 -26 -2012 CAIVIP`US DRIVE NMGATION PIAN FIGURE 5: DRAINAGE AREA DUMAM, NORTH CAROLINA AEcoEngineedng A �,,��,, , hr. �►�.�� TXMWZ , eistW*,e. wwwjghwmcmbmcm ,Ucumft: CAM North Carolina Department of Cultural Resources ,'State Historic Preservation Office Ramona M Bartos, Administrator Beverly Eaves Perdue, Governor Linda A Carlisle, Secretary Jeffrey J Crow, Deputy Secretary July 13, 2012 Eric Alsmeyer Raleigh Regulatory Field Office 3331 Heritage Trade Drive Suite 105 Wake Forest, NC 27587 Office of Archives and History Division of Historical Resources David Brook, Director Re: Stream Impacts for the Construction of the Duke University Water Reclamation Pond, Duke University, West Campus, SAW 2012 - 01043, Durham County, ER 11 -2184 Dear Mt. Alsmeyer: We have received a public notice from the US Army Corps of Engineers concerning the above project. We have conducted a review of the project and are aware of no historic resources which would be affected by the project. Therefore, we have no comment on the project as proposed. The above comments are made pursuant to Section 106 of the National Historic Preservation Act and the Advisory Council on Historic Preservation's Regulations for Compliance with Section 106 codified at 36 CFR Part 800. Thank you for your cooperation and consideration. If you have questions concerning the above comment, please contact Renee Gledhill- Earley, environmental review coordinator, at 919- 807 -6579. In all future communication concerning this project, please cite the above - referenced tracking number. Sincerely, 60311Ramona M. Bartos Location 109 East]ones Street, Raleigh NC 27601 Mailing Address. 4617 Mail Service Center, Raleigh NC 27699 -4617 Telephone /Fax- (919) 807 - 6570/807 -6599 North Carolina Department of Cultural Resources State Historic Preservation Office Peter 13. Sandbeck, ldmtnistrttor Beverly 1:at•es 11cidue, Governor Office of Acehivez and I listory I Midi A Carlisle, Secrelaty Dtvtason of 1 listoncal Re,outce% Jeffrey) Clow, Deputy Secrctaty baud Brook, Uncctor February 9, 2010 George Buchholz Lcol:?ngineer>ng Pty Boy( 11005 Research Triangle Park, NC 27709 Re: Duke Universiq Storrnwater Harvesting facility and Mitigation Design, Durham, DKU- 08010, Durham County, ER 10 -0133 Dear Mr. Buchholz: Thank you for your letter of January 15, 2010, concerning the above project. We have conducted a review of the project and arc aware of no historic resources which would be affected by the project. Therefore, we have no comment on the project as proposed. The above comments are made pursuant to Section 106 of the National Historic Preservation Act and the Advisory Council on Historic Preservation's Regulations for Compliance with Section 106 codified at 36 CFR Part 800. Thank you for your cooperation and consideration. If you have questions concerning the above comment, please contact Renee Gledhill - Farley, environmental review coordinator, at 919 -807 -6579. In all future communication concerning this project, please cite the above - referenced tracking number. Sincerely, LaL && Lo -&At Teter Sandbeck Location- 109 Vast Jonc.. Street, Raleigh N(: 27001 Mailing Address-4617 Afad ScnicY (aver, Raleigh N(.27699-4617 Telephone/Fax- ()19) 807 -6570 /807 -0599 United States Department of the Interior George Buchholz EcoEngincering 2905 Meridian Parkway Durham, NC 27713 FISH ANi) WILDLIFE' SLIMC1=. Raleigh field Office Post (Mice Box 33726 Ralei-h. North Carolina 27636 -3726 February 16, 2010 Re- Duke University Stormwater Harvesting facility and Mitl�ation Desien DKI J- 08010 Dear Mr. Buchholz: This letter is to iilfOr•nl you that a list of all federally- protected endangered and threatened species with known occurrences In North Carolina is now available on the U.S. Dish and Wildlife Service's (Service) web page at ilttp: / /www.fws.gov /raleigh. Therefore, if you have projects that occur within the Raleigh Field Office's area of responsibility (see attached county list), you no longer need to contact the Raleigh Field Office for a list of federally- protected species. Our web page contains a complete and fi•equently updated list of all endangered and threatened species protected by the provisions of the Endangered Species Act of 1973, as amended (16 U.S.( . 1531 ct seq.)(Act), and a list of federal species of concern' that are known to occur" in each county in North Carolina. Section 7 of the Act requires that all federal agencies (or their designated notl4ederal representative), in consultation with the Service, insure that any action federally authorized, funded, or carried out by such agencies is not likely to jeopardize the continued existence of any federally - listed endangered or threatened species. A biological assessment or evaluation play be prepared to fulfill that requirement and in determining whether additional consultation with the Service is necessary. In addition to the federally- protected species list, Information on the species' life histories and habitats and information on completing a biological assessment or evaluation and can be found ail our web page at Ilttp: / /www.fws.gov /raleigh. Please check the web site often for updated information or changes. ' The term " fedei al species of concern" refers to those species which (lie Service believes might be iii need of concenoated conscivatson actions. Federal species of concern ieceive no legal protection and their designation does not necessarily imply that the species will eventually be proposed for listing as a federally endangered or threatened species. However, we recommend that all practicable measures be taken to avoid or minimize adverse impacts to federal species of concern. If your project contains suitable habitat for any of the federally- listed species known to be present within the county where your project occurs, the proposed action has the potential to adversely affect those species. As such, we recommend that surveys be conducted to determine the species' presence or absence within the project area. The use of North Carolina Natural Heritage program data should not be substituted for actual field surveys. If you determine that the proposed action may affect (i.e., likely to adversely affect or not likely to adversely affect) a federally - protected species, you should notify this office with your deternnrnation, the results of your surveys, survey methodologies, and an analysis of the effects of the action on listed species, including consideration of direct, indirect, and cumulative effects, before conducting any activities that might affect the species. If you determine that the proposed action will have no effect (i.e., no beneficial or adverse, direct or indirect effect) on federally listed species, then you arc not required to contact our office for concurrence (unless an Environmental Impact Statement is prepared). HOWevcr, you should maintain a complete record of the assessment, including steps leading to your determination of effect, the qualified personnel conducting the assessment, habitat conditions, site photographs, and any other related articles. With regard to the above - referenced project, we offer the following remarks. Our comments arc Submitted pursuant to, and in accordance with, provisions of the Endangered Species Act. Based on the information provided and other information available, it appears that the proposed action is not likely to adversely affect any federally - listed endangered or threatened species, their formally designated critical habitat, or species currently proposed for listing under the Act at these sites. We believe that the requirements of section 7(a)(2) of the Act have been satisfied for your project. Please remember that obligations under section 7 consultation must be reconsidered if: (1) new information reveals impacts of this identified action that may affect listed species or critical habitat in a manner not previously considered; (2) this action is subsequently modified in a manner that was not considered in this review; or, (3) a new species is listed or critical habitat determined that may be affected by the identified action. However, the Service is concerned about the potential impacts the proposed action might have on aquatic species. Aquatic resources are highly susceptible to sedimentation. Therefore, we recommend that all practicable measures be taken to avoid adverse impacts to aquatic species, including implementing directional boring methods and stringent sedinnent and erosion control measures. An erosion and sedimentation control plan should be submitted to and approved by the North Carolina Division of Land Resources, Land Quality Section prior to construction. Erosion and sedimentation controls should be installed and maintained between the construction site and any nearby down - gradient surface waters. In addition, we recommend maintaining natural, vegetated buffers on all streams and creeks adjacent to the project site. The North Carolina Wildlife Resources Commission has developed a Guidance Memorandum (a copy can be found on our website at (littp: / /www.fAs.gov /raleigh) to address and mitigate secondary and cumulative impacts to aquatic and terrestrial wildlife resources and water quality. We recommend that you consider this document in the development of your projects and in completing an initiation package for consultation (if necessary). 2 We hope you find our web page useful and inibrmative and that following the process described above will reduce the time required, and eliminate the need, for general correspondence for species' lists. If you have any questions or comments, please contact Mark Bowers of this office at (919) 856 -4520 ext. 19. Sincerely, A4--- Pcte Benjamin Field Supervisor 3 List of Counties in the Service's Raleigh Field Orrice Area of Responsibility Alamance Beaufort Bertie Bladen Brunswick Camden Carteret Caswell Chatham Chowan Columbus Craven Cumberland Currituck Dare Duplin Durham Edgecombe Franklin Gates Granville Greene Guilford Halifax Harnett I lertford Hoke Hyde Johnston Jones Lee Lenoir Martin Montgomery Moore Nash New Hanover Northampton Onslow Orange Pamlico Pasquotank Pender 0 Perqulmans Person Pitt Randolph Richmond Robeson Rockingham Sampson Scotland Tyrrell Vance Wake Warren Washington Wayne Wilson ir&ENR North Carolina Department of Environment and Natural Resources Beverly Eaves Perdue Governor January 20, 2010 Mr. George Buchholz EcoEnginecring P.O. Box 14005 Research Triangle Park, NC 27709 Dee Freeman Secretary DI0)d�ty Subject: Duke University -- Stormwater Harvesting Facility and Mitigation Design; Durham, Durham County Project DKiJ -0$010 Dear Mr. Buchholz: 'The Natural Heritage Program has no record of rare species, significant natural communities, significant natural heritage areas, or conservation /managed areas at the site nor within 0.25 -mile of the project area. Our maps show vague locations between 0.25 -mile and a mile of two plant species that have not been seen since 1955. Considering; the amount ofdevclopmcnt in the area, and the 55 years or more that has elapsed, we assume that such species are no longer present within a mile of the project. You may wish to check the Natural Heritage Program database website at www.iiciihl).org fora listing of rare plants and animals and significant natural communities in the county and on the quad map. Our Program also has a new website that allows users to obtain information on element occurrences and significant natural heritage areas within two miles of a given location: < http : / /iilipwcb.ei)i•.state.iic.tis /phis /public /giiiap75_maii).pl)tii3l >. The user name is "public" and the password is "heritage ". You may want to click "Help" for more information. NC OneMap now provides digital Natural Heritage data online for free, 'This service provides site specific information on GIS layers with Natural Ileritagc Program rare species occurrences and Significant Natural Heritage Areas. "The NC OneMap website provides Element Occurrence (EO) 1D numbers (instead of species name), and the data user is then encouraged to contact the Natural Heritage Program for detailed information. ']'his service allows the user to quickly and efficiently get site specific NHP data without visiting the NHP workroom or waiting f'or the Information Request to be answered by NHP staff. For more information about data formats and access, visit <www,nconcmap.com >, then click on "FTP Data Download ", and then "nheo.zip" [to the right of "Natural Heritage Element Occurrences "] You may also e -mail NC OneMap at <dataa (a),ncmaiLnel> for more information. Please do not hesitate to contact me at 919- 715 -8697 if you have questions or need further information. Sincerely, JJ Harry E. LeGrand, Jr., Zoologist Natural Heritage Program 1601 Mail Service Center, Raleigh, North Carolina 27699 -1601 Phone, 919- 733.49841 FAX. 919- 715 -3060 Internet. www.enr state nc us An Equal oppodumly 1 Affirmative Action Employer - 59% Recycled 1'tU% Post Consumer Paper One NorthCarohna I/ WIM7101 , North Carolina Wildlife Resources Commission Gordon Myers, Executive Director 12 February 2010 Mr. George Buchholz EcoEngincering P.O. Box 14005 Research Triangle Park, NC 27709 Subject: Duke University Stormwater Harvesting Facility and Mitigation Design, Durham, North Carolina. DKI3- 08010. Dear Mr, Buchholz: Biologists with the North Carolina Wildlife Resources Commission (NCWRC) have reviewed the subject information and we are familiar with the habitat values of the area. Our comments are provided in accordance with provisions of the Dish and Wildlife Coordination Act (48 Stat. 401, as amended; 16 U.S.C. 661 -667d) and North Carolina General Statutes (G.S. 113 -131 et seq.). Duke University proposes to construct a water harvesting system that includes two stormwater capture basins. The purpose of the project is to harvest stormwater runoff to replace potable City water for process and irrigation water on the campus. The project also includes stream restoration as on -site mitigation for construction of the stormwater capture basins. The proposed stormwater capture basins appear to be impoundments of unnamed tributaries to Sandy Creek in the Cape fear River basin. There are no records for threatened or endangered species in Sandy Creek or its tributaries. Although we do not have any records for listed species on or near the proposed project site, an on -site survey is the only definitive means to determine whether the proposed project would directly impact threatened or endangered species, We suggest you consult with the U.S. Fish and Wildlife Service at (919) 856 -4520 to ensure that any issues related to federally listed species are addressed. We recognize your request for information is specifically related to the presence of threatened or endangered species; however, it appears the proposed project may impound stream channels. The NCWRC hesitates to concur with the construction of instream dams because these can modify stream flows, affect water quality, and can alter the natural diurnal, seasonal, and annual patterns of the upstream and downstream movements of instream biota (Yeager 1993). NCWRC recommends that small impoundments be located off - channel and wetlands be avoided. Any environmental documents or permits related to this project should discuss the reason(s) off - channel impoundments are not feasible. The following are NCWRC's general comments and recommendations regarding construction of impoundments and are provided as information for the applicant Mailing Address: Division of Inland Fisheries - 1721 Mail Service Center - Raleigh, NC 27699 -1721 Telephone: (919) 707 -0220 a Fax: (919) 707 -0028 9i3o1 '6f'�' 9 C C 4ueSA Q Tje 4S e9i :60 OI ZI qeJ Page 2 12 February 2010 Duke University Stormwater Basins DKU -08010 I . The applicant should contact the N.C. Division of Land Quality to determine if a dam safety review is required. 2. The applicant should contact the N.C. Division of Water Resources (DWR) regarding a minimum flow release. 3. The outflow pipe must be designed to draw water from near the bottom of the pond. Coldwater bottom withdrawal devices should be within 1 -2 feet of the bottom, but not on the bottom. This design will prevent buildup of poorly oxygenated water and improve water quality in the pond. The discharge should be aerated to enhance dissolved oxygen levels. 4. Discharge from the impoundment should be routinely monitored to ensure compliance with the required minimum flow release. In addition, outflow water temperatures and dissolved oxygen should be monitored. Outflow water temperatures should be compared to inflow water temperatures and should not exceed the temperature standard for piedmont streams. 5. Only native piedmont species should be stocked in the impoundment. A stocking permit from the NCWRC is now required to stock any species of fish, mollusks or crustaceans in the public, inland fishing waters of North Carolina. Applications for a stocking permit are available at hLA?-/ /v . There is no fee associated with the permit application process. G. Native woody vegetation (e.g., river birch, sycamore, bald cypress, water oak, willow oak, overcup oak, swamp white oak, swamp chestnut oak) should be re- established wherever possible around the impoundment, but not on the dam. We recommend a 50 -foot forested buffer on intermittent streams and a 100 -foot forested buffer on perennial streams. These areas should be protected with conservation easements. 7. Residual flow in the stream below the dam must be maintained during filling of the impoundment to protect aquatic life. However, turbid water should not be discharged. Until water in the impoundment is clear, flexible pipe should be used to maintain any stream flow around the impoundment. S. Concrete is toxic to aquatic life and should not be allowed to come in contact with surface waters until cured. 9. All mechanized equipment operated near surface waters should be inspected and maintained regularly to prevent contamination of stream waters from fuels, lubricants, hydraulic fluids or other toxic materials. 10. Rock, sand, or other materials should not be excavated from the stream channel except in the immediate permitted area. Also, sandbags, flexible pipe, or other stable diversion structures should be used to avoid excavation in flowing water. H. A plan should be developed to manage sediment behind the dam. Potential examples include periodical flushes (thorough sediment analysis and prior assessment of the foreseeable effects of releasing sediment must be included) and sediment removal (passive techniques are preferred such as sediment trapping devices). 12. Sediment and erosion controls measures should be installed prior to any land clearing or construction. These measures should be routinely inspected and properly maintained. Excessive silt and sediment loads can have numerous detrimental effects on aquatic resources including destruction of spawning habitat, suffocation of eggs, and clogging of gills of aquatic species. E ' d SZ9L ' 6tb ' 9EE queF,.ig t je4S eg T :60 01 a T qoj Page 3 12 February 2010 Duke University Stormwater Basins DKU -08010 Thank you for the opportunity to comment on this project. If we can provide further assistance, please contact our office at (336) 449 -7625. Literature cited Yeager, B. L. 1993. Dams. Pages 57-114. In C_ F. Bryan and D. A. Rutherford, editors. Impacts on wormwater streams: Guidelines for evaluation. Southern Division, American Fisheries Society, Little Rock, Arkansas. Sincerely, ,-<s "—A 1�6� Shari L. Bryant Piedmont Region. Coordinator Habitat Conservation Program -�''°1 229L'6-1�119 19CE 4ueRJg tje4s e9T :GO OT ZT qOJ Digital File Name Morpt _Table As Input Data in White Calls (print Copy only) Parameter Drainage Area (m12) Stream Type (Rosgen) Bankfull X -Sec Area, Abia (ft`) Bankfull Width, Wme (ft) Bankfull Mean Depth, Dba (ft) Width to Depth Ratio, Wbia/Dbu Width of Flood -Prone Area, Wipa (ft) Entrenchment Ratio, Wipa/Wbie Bankfull Velocity, VbM (ft/sec) Bankfull Discharge,QbM (ft' /sec) Max Depth at Bankfull, Dma. (ft) Max Depth Ratio, Dma4Dme Bank Height, Drab (ft) Bank Height Ratio (BHR), Dtw/Dmm Meander Length, Lm (ft) Meander Length Ratio, L^bxr Radius of Curvature, Rp (ft) Radius of Curvature Ratio, RdWbM Belt Width, W, (ft) Meander Width Ratio, Wba/WbM Valley Length, L., (ft) Channel Length, L. (ft) Sinuosity, K Valley Slope, svia (ft/ft) Channel Slope, Sa„ (ft/ft) Rr fle Length, Lnr (ft) Riffle Length Ratio, LnMW Riffle Slope, Sar (ft/ft) Riffle Slope Ratio, S„r /Sm Glide Slope, Sai,,e (ft/fl) Pool Max Depth, Dpod (ft) Pool Max Depth Ratio, Dp./DbM Pool Area, Apaa, (ft`) Pool Area Ratio, Apaa�/Abu Pool Width, Wpbai (ft) Pool Width Ratio, WpwMbu Pool Length, Lp. (ft) Pool Length Ratio, Lpoo✓Wbd Pool -Pool Spacing, p -p (ft) Pool -Pool Spacing Ratio, p -p/WbM PC d. (mm) D 50 PC du (mm) (largest from subpave) (Di) Dar /subpave dm (mm) Dhat 50 Stream Name UT Sandy Creek, Duke Campus TERRIBLE CREEK 1 / 1A 2/1B 3 / 3A EXISTING CONDITIONS Upstream Campus Dr EXISTING CONDITIONS Downstream Campus Drive DESIGN STREAM Upstream Campus Drive DESIGN STREAM Downstream Campus Drive Min Max Median Min Max Median Min Max Median Min Max Median Min Max Median 00912 00912 00912 0 128 035 02022 00912 00912 00912 0 128 035 02022 C4 i C4 C4 C4 C4 C4 B4c B4c B4c C4 C4 253 ! 249 275 103 161 155 143 217 178 145 165 155 17 20 18 201 156 192 76 138 9 95 129 112 147 17.2 157 1 f60 too t7.0 12 1.6 14 12 2 t 16 14 1,8 1.5 ID 1.0 10 1.1 1.1 1.1 = 160 98 134 63 66 56 68 7.2 75 150 180 160 150 180 160 200 200 I 200 178 51 3 1 216 155 238 218 60 60 60 60 60 60 100 52.8 104 23 37 24 1,6 18 19 _ 41 35 38 20 32 25 46 5.3 51 58 47 - 4.3 61 4.9 37 46 41 43 51 52 51 1165 b 1314 1404 602 762 666 88 106 67 67 67 67 102 102 102 19 18 18 21 27 22 21 24 23 13 1.7 1,5 114 1.9 16 1 5 I 1,t 13 18 t 3 14 1,5 13 1.5 13 1 8 1 5 13 1 8 1 5 19 18 r 18 28 61 37 29 6 41 13 .1,7 15 1.4 19 16 10 10 10 13 23 t7 14 25 1,8 1 1 1 1 1 1 52 125 , j 102 424 151 67 54 151 893 369 1206 86,6 479 142,3 -433 26 80 53 15.t 24,8 t8t 186 252 2L8 25 7 55 3 75 55 13 1 48 15 96 27 133 72 51 207 133 431 '157 t44 474 17.0 06 31 0.8 02 0,2 02 01 03 02 09 25 1 09 25 1 27 40 36 186 578 3425 21 947 432 22.1 4-14 33,1 24,0 522 356 13 26 1,9 1,9 21 2.6 29 1.9 21 15 275 21 15 275 21 316 316 316 1 1091 1091 1091 1535 1535 1535 10910 10910 10910 15360 15350 15350 403 i 403 403 1414 1414 1414 2012 2012 2012 13092 13092 13092 19M 2' 19832 1980 2 t,28 1,28 1,28 t,30 1,30 130 131 131 1,31 120 1 20 120 129 129 129 0 004 0 004 0 004 00137 00137 00137 00130 00130 00130 00137 00137 00137 00130 00130 00130 0 004 0 004 0 004 00149 00149 00149 00084 00084 00084 0 0114 0 0f 14 00114 00101 00101 00101 546 ,, 2663 1181 372 8846 971 1 74 2131 663 74 30,2 15.7 40 32.3 102 027 i f 71 062 05 64 1.1 02 17 0.6 05 1 75 1 025 17 06 0 002 0 029 0 013 00030 0,1180 00150 00100 1 00730 0 0260 0.006 0 086 0 020 0 010 0 061 0 030 05 78 34 C2 7.9 f,d 12 66 31 05 75 25 1 8 3 00129 00599 00390 00210 02690 00600 00000 0o080 0 0010 00100 01500 00600 0 0100 01500 00600 37 ! 29 29 28 32 3 23 35 29 18 29 20 10 32 21 29 1.8 20 23 15 t9 16 19 10 18 3 2 18 3 2 46 233 ? 233 171 301 236 159 327 252 189 201 213 204 300 24,3 16 09 08 17 1,0 1,5 ,11 1,5 14 13 18 15 12 15 135 218 138 138 85 146 115 97 196 125 147 224 18,1 16.0 241 195 t 1 0,9 0,7 1 1 1 1 13 t 0 1,5 1,1 1 13 1 15 1 1 3 1 15 1871 , 5857 3086 247 1802 714 27 2514 1083 80 345 230 56 417 272 09 38 t6 03 13 OS 0,3 19 10 06 2 15 06 22 16 34.13 1274 - 5788 1077 426 261 112 4054 2232 206 862 47,2 208 949 424 17 82 30 14 3,1 20 12 31 20 14 5 3 13 5 25 177 181 i 102 1 97 97 97 4 4 4 97 97 97 4 4 4 29 37 32 25 25 25 27 27 27 25 25 25 27 27 27 35 45 44 26 26 26 57 57 57 26 26 26 57 57 57 93 382 1125 21 21 21 29 29 29 21 21 21 1 29 29 29 Restoration Plan • Duke University Water Reclamation Pond Stream Mitigation USGS HUC 03030002 • Durham County, North Carolina • October 2012 Photo 1 — Highly eroded banks (Northern Tributary) Photo 2 — Highly eroded banks (Northern Tributary) AEcoEngineering A division of The John R McAdams Company, Inc. Restoration Plan • Duke University Water Reclamation Pond Stream Mitigation USGS HUC 03030002 • Durham County, North Carolina • October 2012 Photo 3 — Highly eroded banks (Northern Tributary) [aEcoEngineering A dMsion ofThc John R. McAdams Compafry, Inc. Restoration Plan • Duke University Water Reclamation Pond Stream Mitigation USGS HUC 03030002 • Durham County, North Carolina • October 2012 Photo 4 — Highly eroded banks (Central Tributary) Photo 5 — Bricks located within the banks (Central Tributary) [jEcoEngineering A division of The John R McAdams Company, Inc. Restoration Plan • Duke University Water Reclamation Pond Stream Mitigation USGS HUC 03030002 • Durham County, North Carolina • October 2012 Photo 6 — Highly eroded banks (Central Tributary) Photo 7 — Existing utility crossing (Central Tributary) [jEcoEngineering A division of The John R. McAdams Company, Inc. Restoration Plan • Duke University Water Reclamation Pond Stream Mitigation USGS HUC 03030002 • Durham County, North Carolina • October 2012 Photo 8 — Highly eroded banks (Southern Tributary) Photo 9 — Highly eroded banks and bricks (Southern Tributary) [jEcoEngineering A division of The John R McAdams Com{wny, Inc. Restoration Plan • Duke University Water Reclamation Pond Stream Mitigation USGS HUC 03030002 • Durham County, North Carolina • October 2012 Photo 10 — Highly eroded banks (Southern Tributary) FjfftoEngineering 4 di ision orThc John R McAdams Company, Joe. INSTRUCTIONS FOR SILT FENCE INSTALLATION 1. REFER TO THE PLANS FOR LOCATION, EXTENT AND SPECIFICATIONS. IF THERE ARE QUESTIONS OR PROBLEMS WITH THE LOCATIONS, EXTENT OR METHOD OF INSTALLATION, CONTACT THE ENGINEER, ARCHITECT OR CONTROL PERSONNEL ON THE SITE FOR ASSISTANCE. EROSION CONTROL PERSONNEL HAVE COPIES OF INSTRUCTIONS AND MAY HAVE PHOTOGRAPHS OF PROPERLY INSTALLED SILT FENCES AS AN AID TO INSTALLATION. 2. IF THE SILT FENCE IS NOT INSTALLED CORRECTLY THE FIRST TIME IT WILL HAVE TO BE REBUILT. DETERMINE THE LOCATION ON THE GROUND TAKING INTO CONSIDERATION: A SILT BARRIER (PREFABRICATED SILT FENCE) CANNOT BE SUBSTITUTED!! THE SILT FENCE MUST BE CONSTRUCTED AS DESCRIBED IN THESE INSTRUCTIONS. ALLOW SUFFICIENT SPACE FOR MAINTENANCE, GRADING, FILLING AND OTHER CONSTRUCTION ACTMTY BETWEEN THE SILT FENCE AND THE CONSTRUCTION SITE. ALLOW AT LEAST: 15 FEET BETWEEN THE FENCE AND SINGLE -STORY BUILDINGS. 25 FEET BETWEEN THE FENCE AND MULTIPLE -STORY BUILDINGS. 10 FEET BETWEEN THE FENCE AND THE TOE OF FILL SLOPES. WHERE POSSIBLE, INSTALL THE SILT FENCE ON THE CONTOUR SO THAT RUNOFF GOES THROUGH THE SLIT FENCE AND DOES NOT FLOW ALONG THE SILT FENCE AT THE LOWEST POINT. WHERE PONDING DOES OCCUR SILT FENCE OUTLETS MAY BE NECESSARY SO THAT THE FENCE DOES NOT COLLAPSE. 3. CLEAR THE LOCATION OF THE SILT FENCE, CLEARING ONLY WHAT IS NEEDED TO PROVIDE ACCESS TO PERSONNEL AND EQUIPMENT FOR INSTALLATION. IT IS PERMISSIBLE TO PLACE THE SILT FENCE IN THE EDGE OF EXISTING TREES AS LONG AS THE OWNER ALLOWS IT AND CARE IS TAKEN TO PROTECT THESE TREES DURING INSTALLATION MAINTENANCE AND REMOVAL IF THE TREES ARE TO REMAIN AFTER CONSTRUCTION. DO NOT ATTACH THE FILTER FABRIC TO THE TREES, AS IT MAKES BURYING THE TOES IMPOSSIBLE. 4. EXCAVATE A 6 INCH X 6 INCH TRENCH ALONG THE LOCATION OF THE FENCE, USING A "DITCH WITCH" IS HELPFUL 5. ALONG THE LOWER SIDE OF THE TRENCH, PLACE STEEL FENCE POSTS NO MORE THAN 8 FEET APART AND DRIVE THEM 18 INCHES INTO THE GROUND. 6. ATTACH WIRE FENCE ( "HOG WIRE" OF MINIMUM 14 GAUGE WITH MAXIMUM MESH OF 6 INCHES) TO THE UPHILL SIDE OF THE POSTS AND PLACE 12 INCHES OF THE BOTTOM OF THE FENCE INTO THE TRENCH. DO NOT USE "CHICKEN WIRE ". USE WIRE TO FASTEN THE FENCE TO THE POSTS. THE COMPLETED FENCE MUST BE AT LEAST 2 FEET HIGH AND NOT MORE THAN 3 FEET HIGH. 7. ATTACH SYNTHETIC FILTER TO THE UPSIDE OF THE WIRE FENCE WITH STAPLES A MINIMUM OF 12 INCHES APART AND PLACE 12 INCHES OF THE FABRIC INTO THE TRENCH WITH THE WIRE FENCE. USE ROLLS OF FABRIC AND CUT TO THE NECESSARY LENGTH IN ORDER TO MINIMIZE THE NUMBER OF JOINTS. 8. BACKFILL THE TRENCH AND TAMP THE FILL TO FIRMLY ANCHOR THE BOTTOM OF THE FILTER FABRIC AND WIRE FENCE TO PREVENT WATER FROM FROM FLOWING UNDER THE FENCE; MAKE IT GO THROUGH THE FILTER FABRIC. 9. WHERE IT IS IMPOSSIBLE TO INSTALL THE SILT FENCE ON THE CONTOUR, RUNOFF WILL FLOW ALONG THE FENCE AND POND AT THE LOWEST POINT, WHERE THE TOTAL DRAINAGE AREA TO THE POINT OF PONDING IS GREATER THAN 5,000 SQUARE FEET (FOR EXAMPLE: A SQUARE 70 FEET ON A SIDE), A SILT FENCE OUTLET IS REQUIRED; WHERE THE DRAINAGE ARE IS GREATER THAN 10,000 SQUARE FEET (FOR EXAMPLE: A SQUARE 100 FEET ON A SIDE), A SEDIMENT TRAP IS NECESSARY. THE LOCATION OF THIS OUTLET MAY BE SHOWN ON THE PLAN, BUT CHECK THE INSTALLATION IN THE FIELD WHEN THE WIRE FENCE IS UP TO DETERMINE IF ADDITIONAL OUTLETS ARE NEEDED. SEE THE DETAILS OF THE SILT FENCE FOR INSTRUCTIONS. MAINTENANCE MATERIALS, EQUIPMENT AND PERSONNEL MUST BE AVAILABLE FOR MAINTENANCE AT ALL TIMES 1. INSPECT THE SILT FENCE: DURING CONSTRUCTION: TO SEE IF MACHINERY OR FALLING TREES HAVE DAMAGED THE SILT FENCE, REPAIR IT. TO SEE THAT FILL MATERIAL HAS NOT ACCUMULATED AGAINST THE FENCE; IF IT HAS, REMOVE THAT MATERIAL, REPAIR THE FENCE AND MOVE THE FENCE OR FILL SO THAT IT DOES NOT HAPPEN AGAIN. AFTER EACH RAINFALL: TO SEE IF RUNOFF IS NOT FLOWING UNDER THE FENCE; IF IT IS, BURY THE BOTTOM OF THE FENCE CORRECTLY. TO SEE THAT RUNOFF HAS NOT TOPPED THE FENCE IN LOW POINTS; IF IT HAS, AN OUTLET MAY BE NEEDED AT THAT POINT TO PREVENT FUTURE FAILURES. 2. CLEAN OUT ACCUMULATED SEDIMENT WHEN IT REACHES A DEPTH OF ONE -HALF THE HEIGHT OF THE FILTER FABRIC. PLACE THE SEDIMENT IN A DISPOSAL AREA OR, IF APPROPRIATE, MIX IT WITH DRY SOIL ON THE SITE. 3. DO NOT DISPOSE OF SEDIMENT IN A MANNER THAT WILL CREATE AN EROSION HAZARD. DO NOT ERECT A NEW SILT FENCE ON TOP OF ACCUMULATED SEDIMENT BEHIND THE FENCE. 4. REPAIR ANY BREAKS OR ROTTED PLACES IN THE FILTER FABRIC. 5. IF THE FENCE IS SAGGING BETWEEN POSTS, INSTALL ADDITIONAL POSTS. 6. WHEN MAKING REPAIRS, ALWAYS RESTORE THE SILT FENCE TO ITS ORIGINAL DESIGN CONFIGURATION. REMOVAL 1. WHEN GRADING IN THE DRAINAGE AREA ABOVE THE SILT FENCE HAS BEEN FINISHED AND DISTURBED AREAS SUFFICIENTLY STABILIZED TO RESTRAIN EROSION, THE SILT FENCE AND ANY OUTLETS MAY BE REMOVED. 2. REMOVE ANY ACCUMULATED SEDIMENT AND DISPOSE OF IT PROPERLY. 3. REMOVE POSTS, FENCE AND FABRIC; DISPOSE OF THEM PROPERLY. 4. STABILIZE THE DISTURBED AREA WHERE THE FENCE WAS LOCATED. FILTER (CAVATE A 6" X 6" H ALONG THE LOCATION E FENCE. DRIVE POSTS TO THE GROUND ON OWER SIDE OF THE H. ATTACH WIRE FENCE WIRE) TO THE POSTS :XTEND THE BOTTOM 12" "HE TRENCH. 6" X 6" TRENCH 2. ATTACH THE FILTER FABRIC TO THE WIRE FENCE WITH STAPLES AND EXTEND THE BOTTOM 12" INTO THE BOTTOM OF THE TRENCH. USE A SYNTHETIC FABRIC D0 NOT USE BURLAP !II 3. BACKFILL THE TRENCH AND COMPACT SOIL TO SECURELY ANCHOR THE BOTTOM .. ..... STEEL POST "HOG WIRE" NOT CHICKEN WIRE SYNTHETIC FILTER FABRIC BOTTOM WIRE FENCE AND FILTER FABRIC BURIED IN THE EXCAVATED TRENCH AN ACCEPTABLE ALTERNATIVE TO BURYING THE BOTTOM OF THE FENCE IS TO LAY 12" OF THE FENCE AND FABRIC ON THE GROUND AND COVER IT WITH 6" OF WASHED STONE, BUT NOT JUST SOIL. ILLUSTRATION OF A SILT FENCE INSTALLATION (NOT TO SCALE) INSTRUCTIONS FOR SILT FENCE OUTLET INSTALLATION 1. REFER TO THE PLANS FOR LOCATIONS AND SPECIFICATIONS. DURING INSTALLATION OF THE SILT BARRIER OR SILT FENCE, INSPECT THE INSTALLATION TO DETERMINE IF OUTLETS ARE NEEDED ACCORDING TO THE CRITERIA SET FORTH IN THE SPECIFICATIONS FOR THE BARRIER AND FENCE. IF THERE ARE Q UESTIONS OR PROBLEMS WITH THE LOCATION EXTENT OR METHOD OF INSTALLATION CONTACT THE ENGINEER ARCHITECT OR RESPONSIBLE PERSONNEL ON THE SITE FOR ASSISTANCE. EROSION CONTROL PERSONNEL HAVE COPIES OF INSTRUCTIONS AND MAY HAVE PHOTOGRAPHS OF PROPERLY INSTALLED OUTLETS AS AN AID TO INSTALLATION. IF THE SILT FENCE OUTLET IS NOT INSTALLED CORRECTLY THE FIRST TIME, IT WILL HAVE TO BE REBUILT. 2. DETERMINE THE EXACT LOCATION ON THE GROUND BEFORE COMPLETING INSTALLATION OF THE SILT FENCE TAKING INTO CONSIDERATION: • INSTALL THE OUTLET AT THE LOWEST POINT (S) IN THE BARRIER OR FENCE WHERE WATER WILL POND. • INSTALL THE OUTLET WHERE IT IS ACCESSIBLE FOR INSTALLATION, MAINTENANCE, AND REMOVAL • ALLOW AT LEAST: 15 FEET BETWEEN THE BARRIER OR FENCE AND SINGLE -STORY BUILDINGS. 25 FEET FOR FORK LIFTS BETWEEN THE BARRIER OR FENCE AND MULTIPLE -STORY BUILDINGS. 10 FEET BETWEEN THE BARRIER OR FENCE AND THE TOE OF FILL SLOPES. • PLACE THE OUTLET SO THAT WATER FLOWING THROUGH IT WILL NOT CREATE AN EROSION HAZARD BELOW: AVOID STEEP SLOPES BELOW THE OUTLET AND AREAS WITHOUT PROTECTIVE VEGETATION. USE SLOPE DRAINS IF NECESSARY. • DETERMINE THE LOCATION OF THE OUTLET: FOR A SILT BARRIER, WHEN THE TRENCH IS DUG TO BURY THE BOTTOM OF THE FABRIC BECAUSE THE BARRIER WILL BE OMITTED AT THE OUTLET; FOR A SILT FENCE, WHEN THE WIRE FENCE IS IN PLACE BECAUSE THE FILTER FABRIC WILL BE OMITTED AT THE OUTLET. 3. REFER TO THE ILLUSTRATIONS OF THE OUTLET IN THE PLAN. 4. CLEAR STUMPS AND ROOTS FROM THE LOCATION OF THE OUTLET. CLEAR ADEQUATE ACCESS FOR THE EQUIPMENT NEEDED FOR INSTALLATION, MAINTENANCE, AND REMOVAL 5. FOR A SILT BARRIER: • JUST BELOW THE GAP IN THE BARRIER, PLACE A LAYER OF FILTER FABRIC ON THE GROUND TO PROTECT THE SOIL FROM EROSION BY OUTFLOW FROM THE OUTLET, PLACE 6 INCHES OF THE UPPER EDGE IN THE TRENCH. STAKE THE REMAINING EDGES OF THE FABRIC TO HOLD IT IN PLACE. • ALONG THE GAP WHERE THE OUTLET WILL GO, PLACE STEEL FENCE POSTS FOR STRENGTH. THE POSTS MUST BE A MAXIMUM OF 2 FEET APART AND DRIVEN INTO SOLID GROUND AT LEAST 18 INCHES. • PLACE HARDWARE CLOTH (WELDED GALVANIZED SCREEN WITH SQUARE 1/4 - 1/2 -INCH HOLES) ON THE UPHILL SIDE OF THE POSTS TO HOLD THE WASHED STONE IN PLACE. PUT 6 INCHES OF THE BOTTOM OF THE CLOTH IN THE TRENCH AND FASTEN IT TO THE POSTS WITH LENGTHS OF WIRE. • BURY THE BOTTOM OF THE HARDWARE CLOTH AND THE UPPER EDGE OF THE FILTER FABRIC BELOW THE OUTLET IN THE TRENCH AND COMPACT THE FILL • PLACE A FILTER OF 1 -INCH DIAMETER WASHED STONE ON THE UPHILL SIDE OF THE OUTLET. PILE THE STONE UP TO THE TOP OF THE HARDWARE CLOTH AND OVER THE JOINT BETWEEN THE OUTLET AND THE BARRIER. 6. FOR A SILT FENCE: • JUST BELOW THE GAP IN THE BARRIER, PLACE A LAYER OF FILTER FABRIC ON THE GROUND TO PROTECT THE SOIL FROM EROSION BY OUTFLOW FROM THE OUTLET, 6 INCHES OF THE UPPER EDGE IN THE TRENCH. STAKE THE OTHER EDGES OF THE FABRIC TO HOLD IT IN PLACE. • ALONG THE GAP WHERE THE OUTLET WILL GO, PLACE ADDITIONAL STEEL FENCE POSTS FOR STRENGTH. THE POSTS MUST BE A MAXIMUM OF 2 FEET APART AND DRIVEN INTO SOLID GROUND AT LEAST 18 INCHES. • PLACE HARDWARE CLOTH (WELDED GALVANIZED SCREEN WITH SQUARE 1/4 - 1/2 -INCH HOLES) ON THE UPHILL SIDE OF THE POSTS TO HOLD THE WASHED STONE IN PLACE. PUT 6 INCHES OF THE BOTTOM OF THE CLOTH IN THE TRENCH AND FASTEN IT TO THE POSTS WITH LENGTHS OF WIRE. • BURY THE BOTTOM OF THE HARDWARE CLOTH, THE UPPER EDGE OF THE FILTER FABRIC BELOW THE OUTLET, AND THE WIRE FENCE IN THE TRENCH AND COMPACT THE FILL • - PLACE A FILTER OF 1 INCH DIAMETER WASHED STONE ON THE UPHILL SIDE OF THE OUTLET. PILE THE STONE UP TO THE TOP OF THE HARDWARE CLOTH AND OVER THE JOINT BETWEEN THE OUTLET AND THE SILT FENCE. MAINTENANCE MATERIALS, EQUIPMENT, AND PERSONNEL MUST BE AVAILABLE FOR MAINTENANCE AT ALL TIMES. 1. INSPECT THE SILT FENCE: • DURING CONSTRUCTION: TO DETERMINE IF MACHINERY, FALLING TREES, ETC. HAVE DAMAGED THE BARRIER, FENCE, OR OUTLET, IF DAMAGED, MAKE REPAIRS. TO SEE THAT FILL MATERIAL HAS NOT ACCUMULATED AGAINST THE OUTLET, BLOCKING OUTFLOW; IF IT HAS, REMOVE THE MATERIAL, REPAIR THE DAMAGE, AND MOVE THE FENCE OR FILL SO THAT IT DOES NOT HAPPEN AGAIN. • AFTER EACH RAINFALL TO DETERMINE IF RUNOFF FLOWING THROUGH THE OUTLET HAS CAUSED DAMAGE BY UNDERMINING THE FENCE OR OUTLET, OR IF ACCUMULATED WATER HAS COLLAPSED THE OUTLET. IF IT HAS, MAKE REPAIRS OR INSTALL A SEDIMENT TRAP IF NECESSARY TO PREVENT FUTURE FAILURES. 2. CLEAN OUT ACCUMULATED SEDIMENT WHEN IT REACHES A DEPTH OF ONE -HALF THE HEIGHT OF THE OUTLET. PLACE THE SEDIMENT IN A DISPOSAL AREA, OR MIX IT WITH DRY SOIL ON THE SITE IF APPROPRIATE. DO NOT DISPOSE OF SEDIMENT IN A MANNER THAT WILL CREATE AN EROSION HAZARD. 3. WHEN THE WASHED STONE BECOMES CLOGGED WITH SEDIMENT AND DEBRIS, SCRAPE THE CONTAMINATED STONE OFF, DISPOSE OF IT PROPERLY, AND REPLACE IT WITH CLEAN STONE. 4. REPAIR THE OUTLET IF DAMAGED BY USE OR DURING MAINTENANCE. REBUILD IT TO THE ORIGINAL CONFIGURATION. REMOVAL 1. WHEN GRADING IN THE DRAINAGE AREA ABOVE THE OUTLET HAS BEEN COMPLETED AND DISTURBED AREAS SUFFICIENTLY STABILIZED TO RESTRAIN EROSION, THE OUTLET MUST BE REMOVED. 2. CLEAN OUT ACCUMULATED SEDIMENT AND DISPOSE OF IT PROPERLY. 3. REMOVE POSTS, FENCE, FABRIC WIRE, AND WASHED STONE; DISPOSE OF THEM PROPERLY. 4. GRADE THE LOCATION AS NECESSARY. 5. STABILIZE THE DISTURBED AREA WHERE THE OUTLET WAS LOCATED. EXISTING GROUND PUMP HOSE SEDIMENT FILTER BAG INSTRUCTIONS FOR GRAVEL CONSTRUCTION EXIT INSTALLATION: 1. REFER TO PLANS FOR LOCATION AND SPECIFICATIONS. IF THERE ARE QUESTIONS OR PROBLEMS WITH THE LOCATION OR METHODS OF INSTALLATION CONTACT THE ENGINEER, ARCHITECT OR RESPONSIBLE PERSONNEL ON THE SITE FOR ASSISTANCE. EROSION CONTROL PERSONNEL HAVE COPIES OF INSTRUCTIONS AND PHOTOGRAPHS OF PROPERLY INSTALLED EXITS AS AN AID TO INSTALLATION. IF THE CONSTRUCTION EXIT IS NOT INSTALLED CORRECTLY THE FIRST TIME, IT HALL HAVE TO BE REBUILT. 2. DETERMINE THE LOCATION ON THE GROUND, TAKING INTO CONSIDERATION: • THE CONSTRUCTION EXIT MUST BE IN PLACE DURING ALL PHASES OF CONSTRUCTION; IF THE LOCATION IS TO BE GRADED, THE EXIT MUST BE INSTALLED FOR THE INITIAL WORK, REMOVED TO ALLOW GRADING OF THE LOCATION, AND REPLACED IMMEDIATELY AFTER GRADING SO THAT IT IS IN PLACE AND FUNCTIONING AT ALL TIMES. IF THE SITE WILL HAVE A LARGE NUMBER OF VEHICLES USING THE EXIT IT IS ADVISABLE TO HAVE A DIVIDED ENTRANCE THAT DIRECTS ENTERING TRAFFIC THROUGH A SEPARATE TRAVEL WAY PARALLEL TO THE GRAVEL CONSTRUCTION EXIT IN ORDER OT REDUCE THE NUMBER OF TRIPS OVER THE STONE, INCREASING THE LIFE OF THE GRAVEL, AND REDUCING MAINTENANCE, REFER TO THE ILLUSTRATION FOR DETAILS. • RUNOFF AND SEDIMENT FROM THE SITE MUST BE DIRECTED AWAY FROM THE EXIT SO THAT IT DOES NOT FLOW INTO HE STREET OR OTHER OFF -SITE AREA; CHOOSE A LOCATION FOR THE EXIT THAT WILL MAKE IT EASY TO DIVERT THE RUNOFF TO SEDIMENT - TRAPPING DEVICES. • IF THE PERSON RESPONSIBLE FOR THE DISTURBANCE FAILS TO TAKE INITIATIVE TO KEEP SOIL AND DEBRIS ON THE SITE ENFORCEMENT ACTION MAY BE TAKEN AGAINST THE SITE AND THE GRADING PERMIT REVOKED AND /OR A STOP WORK ORDER ISSUED. 3. CLEAR THE LOCATION OF THE EXIT, REMOVING STUMPS, ROOTS AND OTHER VEGETATION IN ORDER TO PROVIDE A FIRM FOUNDATION SO THAT THE STONE IS NOT PRESSED INTO SOFT GROUND. CLEAR ENOUGH WIDTH TO ALLOW PASSAGE OF LARGE VEHICLES, BUT CLEAR ONLY WHAT IS NECESSARY FOR THE EXIT. DO NOT CLEAR ADJACENT AREAS UNTIL THE REQUIRED EROSION CONTROL DEVICES ARE IN PLACE. IF THE SOIL AT THE LOCATION IS SOFT IT IS ADVISABLE TO PLACE A 6 TO 8 INCH LAYER OF CRUSHER RUN STONE DOWN FIRST TO PROVIDE A FIRM FOUNDATION AND PREVENT THE WASHED STONE BEING PRESSED INTO THE GROUND. 4. AT THE LOCATION OF THE EXIT, PLACE AN 8 -INCH LAYER OF WASHED STONE 2 TO 3 INCHES IN DIAMETER AT LEAST 50 FEET LONG AND AS WIDE AS THE FULL WIDTH OF THE EXIT OR AT LEAST 10 FEET WIDE. FLARE THE END OF THE STONE WHERE IT MEETS THE PAVEMENT SO THAT THE WHEELS OF TURNING VEHICLES REMAIN ON STONE AND DO NOT TRAVEL OVER UNPROTECTED SOIL. 5. A SQUARE -EDGED SHOVEL AND BROOM WITH STIFF BRISTLES MUST BE PROVIDED AT THE EXIT FOR REMOVING ANY MUD THAT MAY BE TRACKED INTO THE STREET. USE: 1. AS VEHICLES LEAVING THE SITE DRIVE ACROSS THE WASHED STONE THE ABRASIVE ACTION OF THE WASHED STONE SHOULD BE REMOVE SEDIMENT FROM THE TIRES. IT MAY BE NECESSARY TO USE A SHOVEL TO REMOVE MUD TRAPPED BETWEEN DUAL WHEELS. 2. ANY SOIL TRACKED FROM THE SITE MUST BE REMOVED IMMEDIATELY. A SHOVEL AND BROOM MUST BE USED TO REMOVE AS MUCH SOIL AS POSSIBLE BEFORE WASHING PAVEMENT. MAINTENANCE MATERIALS, EQUIPMENT AND PERSONNEL MUST BE AVAILABLE FOR MAINTENANCE AT ALL TIMES. 1. WHEN THE STONE IS THE EXIT BECOMES CONTAMINATED NTH SOIL AND ITS FUNCTION IS REDUCED TO WHERE SEDIMENT IS BEING TRACKED INTO THE STREET, A 4 -INCH LAYER OF CLEAN STONE MUST BE ADDED. 2. DIVERSIONS USED TO DIRECT RUNOFF AWAY FROM THE EXIT TO SEDIMENT - TRAPPING DEVICES MUST BE MAINTAINED ACCORDING TO SPECIFICATIONS FOR THOSE DEVICES. 3. THE GRAVEL CONSTRUCTION EXIT MUST BE MAINTAINED SO THAT MUD AND DUST ARE KEPT ON -SITE. PROBLEMS MUST BE ANTICIPATED AND PREVENTIVE MAINTENANCE MUST BE PERFORMED. REMOVAL 1. WHEN THE GRAVEL CONSTRUCTION EXIT IS NO LONGER NEEDED , WHEN THE TRAVEL WAYS HAVE BEEN STABILIZED AND THE POTENTIAL FOR TRACKING SOIL AND DEBRIS INTO THE STREET HAS BEEN REMOVED, THE GRAVEL CONSTRUCTION EXIT MAY BE REMOVED. 2. THE STONE AND ANY SEDIMENT SHOULD BE REMOVED AND PROPERLY DISPOSED OF WHERE THE WALL NOT CREATE AN EROSION HAZARD. A IT IS ADVISABLE TO PROVIDE A , SEPARATE ENTRANCE TO May A MINIMUM REDUCE TRAFFIC ACROSS THE 12 EXIT AND WEAR AND \ KEEP A BROOM AND MAINTENANCE \\ SHOVEL CLOSE TO THE EXIT TO CLEAN THE EXIT LOCATION MUST SLOPE THE STREET AWAY FROM THE STREET OR STEPS MUST BE TAKEN (GRADING, DIVERSIONS, ETC) TO PREVENT RUNOFF FLOWING INTO THE STREET LAYER OF 2 " -3" WASHED STONE 8" FOUNDATION OF COMPACTED RUN STONE SECTION A -A' CONSTRUCTIONE ENTRANCE/E= DETAIL N To BANKFULL STAGE BLANKET KEYED 6 INCH MIN. ':.� 6 " -12" BACKFILLED AND COMPACTED EROSION CONTROL (COIR) MAT ANCHORING CROSS- SECTION VIEW APPROPRIATE SIZE ` 12"-24" RIP RAP PAD C O STREAM BANK MIN. THICKNESS 8" STREAM I I �O o CLASS A OR B JOU 6 " -� 2" O :... .:.... OJ�O EROSION CONTR FILTER FABRIC J STONE J� O( FOR DRAINAGE �S� MIN. OL O� 1 >Z1 C1f 1 �Y, (NON - WOVEN) EDGE ANCHORING SECTION A -A' ROCK CHECK DAM DETAIL NOT TO SCALE NOTES: AT THE DESIGNER'S DISCRETION, ALTERNATE DEWATERING STRUCTURES MAY BE USED (i.e. SEDIMENT TANKS, FILTER BOX, STRAW BALE /SILT FENSE PIT). HOWEVER, REGARDLESS OF THE DEWATERING STRUCTURE USED, ALL MUST BE SIZED AND OPERATE TO ALLOW ALL PUMPED WATER TO BE FILTERED TO PREVENT SEDIMENTS FROM ESCAPING THE SITE. PROFILE VIEW TEMPORARY DEWATERING STRUCTURE DETAIL NOT TO SCALE MATCH MAT EDGE ELEVATIO1 WITH BASE FLOW ELEVATION CROSS - SECTION 24" ECOSTAKE OR EQUIVALENT INSTALLED AT TOE OF SLOPE, CHANNEL EROSION CONTROL (COIR) MAT ANCHORING ISOMETRIC VIEW 0.. 1 FOOT MIN. EROSION CONTROL BLANKET BLANKET KEYED 6 INCH MIN. FLOW EROSION CONTROL MATTING, ANCHOR IN TRENCH ® BOTH TOP AND BOTTOM EDGES BOTH - I _ 3. BOTH 24" ECOSTAKE OR EQUIVALENT INSTALLED ABOVE TOE OF SLOPE EROSION CONTROL COIR) MAT ANCHORING PLAN VIEW l 12" & 24" /Xl AS DIRECTED NORTH AMERICAN GREEN EC ❑STAKES OR EQUIVALENT ECO -STAKE PROFILE VIEW NOTES: 1. THE COIR FIBER MAT SHALL BE USED TO STABILIZE THE NEWLY CONSTRUCTED CHANNEL FROM THE TOP OF BANK TO TOE OF SLOPE. 2. THE CHANNEL SIDE SLOPES SHALL BE FINE GRADED, SEEDED, FERTILIZED, AND LIMED PRIOR TO INSTALLING THE EROSION CONTROL BLANKET. 3. THE EROSION CONTROL BLANKET SHALL CONSIST OF A MACHINE - PRODUCED BLANKET MADE OF COCONUT FIBER. SEE SPECS. 4. THE STAPLES SHALL BE MADE OF WOOD SHAPED WITH LEGS 18" IN LENGTH AND A 1" CROWN. STAPLES SHALL BE SPACED ACCORDING TO THE BLANKET MANUFACTURERS INSTRUCTIONS TO ENSURE THE MATTING IS HELD FIRMLY IN PLACE. EROSION CONTROL MAT ANCHORING DETAILS NOT TO SCALE PRELIMINARY DRAWING - NOT RELEASED FOP, CONSTRUCTION 0) • r�"-i W w ■ � ,�"� cat U E � o 0 5 rr z z �� v, W a � d' q 0 v c W F-� 0 O o z U y z�� um d= It W o ,7 a oa = W0.i W d W o U' z W O y F z W P4 !4 4WD E-4 a a z cn A 0 Imo' F, W zz� �E z wxo z z E'' x d� W � O � a z O 6 6z z � ° U W a O z z U O z 0 �D U Q N� W w AQ V) c� a U PROJECT N0. DKU -8010 FILENAME: DKU8010 -D1 DESIGNED BY: AN G DRAWN BY: AN G SCALE: N.T.S. DATE: 10-26-2012 SHEET N0. D -1 E��� END OF /FILTER FABRIC SILT FENCE 4' MIN. STEEL FENCE POST T WIRE FENCE - HARDWARE CLOTH TOP OF SILT FENCE MUST BE AT LEAST - FILTER OF 1" DIA. WASHED STONE V ABOVE THE TOP FILTER FABRIC OF THE WASHED ON GROUND STONE SILT FENCE BURY WIRE FENCE AND END OF HARDWARE CLOTH STEEL FENCE POST FILTER FABRIC SET MAX. 2' APART BURY WIRE FENCE, FILTER FABRIC, AND HARDWARE CLOTH IN TRENCH PLAN VIEW SECTION FRONT VIEW SILT FENCE GRAVEL OUTLET DETAIL NOT TO SCALE EXISTING GROUND PUMP HOSE SEDIMENT FILTER BAG INSTRUCTIONS FOR GRAVEL CONSTRUCTION EXIT INSTALLATION: 1. REFER TO PLANS FOR LOCATION AND SPECIFICATIONS. IF THERE ARE QUESTIONS OR PROBLEMS WITH THE LOCATION OR METHODS OF INSTALLATION CONTACT THE ENGINEER, ARCHITECT OR RESPONSIBLE PERSONNEL ON THE SITE FOR ASSISTANCE. EROSION CONTROL PERSONNEL HAVE COPIES OF INSTRUCTIONS AND PHOTOGRAPHS OF PROPERLY INSTALLED EXITS AS AN AID TO INSTALLATION. IF THE CONSTRUCTION EXIT IS NOT INSTALLED CORRECTLY THE FIRST TIME, IT HALL HAVE TO BE REBUILT. 2. DETERMINE THE LOCATION ON THE GROUND, TAKING INTO CONSIDERATION: • THE CONSTRUCTION EXIT MUST BE IN PLACE DURING ALL PHASES OF CONSTRUCTION; IF THE LOCATION IS TO BE GRADED, THE EXIT MUST BE INSTALLED FOR THE INITIAL WORK, REMOVED TO ALLOW GRADING OF THE LOCATION, AND REPLACED IMMEDIATELY AFTER GRADING SO THAT IT IS IN PLACE AND FUNCTIONING AT ALL TIMES. IF THE SITE WILL HAVE A LARGE NUMBER OF VEHICLES USING THE EXIT IT IS ADVISABLE TO HAVE A DIVIDED ENTRANCE THAT DIRECTS ENTERING TRAFFIC THROUGH A SEPARATE TRAVEL WAY PARALLEL TO THE GRAVEL CONSTRUCTION EXIT IN ORDER OT REDUCE THE NUMBER OF TRIPS OVER THE STONE, INCREASING THE LIFE OF THE GRAVEL, AND REDUCING MAINTENANCE, REFER TO THE ILLUSTRATION FOR DETAILS. • RUNOFF AND SEDIMENT FROM THE SITE MUST BE DIRECTED AWAY FROM THE EXIT SO THAT IT DOES NOT FLOW INTO HE STREET OR OTHER OFF -SITE AREA; CHOOSE A LOCATION FOR THE EXIT THAT WILL MAKE IT EASY TO DIVERT THE RUNOFF TO SEDIMENT - TRAPPING DEVICES. • IF THE PERSON RESPONSIBLE FOR THE DISTURBANCE FAILS TO TAKE INITIATIVE TO KEEP SOIL AND DEBRIS ON THE SITE ENFORCEMENT ACTION MAY BE TAKEN AGAINST THE SITE AND THE GRADING PERMIT REVOKED AND /OR A STOP WORK ORDER ISSUED. 3. CLEAR THE LOCATION OF THE EXIT, REMOVING STUMPS, ROOTS AND OTHER VEGETATION IN ORDER TO PROVIDE A FIRM FOUNDATION SO THAT THE STONE IS NOT PRESSED INTO SOFT GROUND. CLEAR ENOUGH WIDTH TO ALLOW PASSAGE OF LARGE VEHICLES, BUT CLEAR ONLY WHAT IS NECESSARY FOR THE EXIT. DO NOT CLEAR ADJACENT AREAS UNTIL THE REQUIRED EROSION CONTROL DEVICES ARE IN PLACE. IF THE SOIL AT THE LOCATION IS SOFT IT IS ADVISABLE TO PLACE A 6 TO 8 INCH LAYER OF CRUSHER RUN STONE DOWN FIRST TO PROVIDE A FIRM FOUNDATION AND PREVENT THE WASHED STONE BEING PRESSED INTO THE GROUND. 4. AT THE LOCATION OF THE EXIT, PLACE AN 8 -INCH LAYER OF WASHED STONE 2 TO 3 INCHES IN DIAMETER AT LEAST 50 FEET LONG AND AS WIDE AS THE FULL WIDTH OF THE EXIT OR AT LEAST 10 FEET WIDE. FLARE THE END OF THE STONE WHERE IT MEETS THE PAVEMENT SO THAT THE WHEELS OF TURNING VEHICLES REMAIN ON STONE AND DO NOT TRAVEL OVER UNPROTECTED SOIL. 5. A SQUARE -EDGED SHOVEL AND BROOM WITH STIFF BRISTLES MUST BE PROVIDED AT THE EXIT FOR REMOVING ANY MUD THAT MAY BE TRACKED INTO THE STREET. USE: 1. AS VEHICLES LEAVING THE SITE DRIVE ACROSS THE WASHED STONE THE ABRASIVE ACTION OF THE WASHED STONE SHOULD BE REMOVE SEDIMENT FROM THE TIRES. IT MAY BE NECESSARY TO USE A SHOVEL TO REMOVE MUD TRAPPED BETWEEN DUAL WHEELS. 2. ANY SOIL TRACKED FROM THE SITE MUST BE REMOVED IMMEDIATELY. A SHOVEL AND BROOM MUST BE USED TO REMOVE AS MUCH SOIL AS POSSIBLE BEFORE WASHING PAVEMENT. MAINTENANCE MATERIALS, EQUIPMENT AND PERSONNEL MUST BE AVAILABLE FOR MAINTENANCE AT ALL TIMES. 1. WHEN THE STONE IS THE EXIT BECOMES CONTAMINATED NTH SOIL AND ITS FUNCTION IS REDUCED TO WHERE SEDIMENT IS BEING TRACKED INTO THE STREET, A 4 -INCH LAYER OF CLEAN STONE MUST BE ADDED. 2. DIVERSIONS USED TO DIRECT RUNOFF AWAY FROM THE EXIT TO SEDIMENT - TRAPPING DEVICES MUST BE MAINTAINED ACCORDING TO SPECIFICATIONS FOR THOSE DEVICES. 3. THE GRAVEL CONSTRUCTION EXIT MUST BE MAINTAINED SO THAT MUD AND DUST ARE KEPT ON -SITE. PROBLEMS MUST BE ANTICIPATED AND PREVENTIVE MAINTENANCE MUST BE PERFORMED. REMOVAL 1. WHEN THE GRAVEL CONSTRUCTION EXIT IS NO LONGER NEEDED , WHEN THE TRAVEL WAYS HAVE BEEN STABILIZED AND THE POTENTIAL FOR TRACKING SOIL AND DEBRIS INTO THE STREET HAS BEEN REMOVED, THE GRAVEL CONSTRUCTION EXIT MAY BE REMOVED. 2. THE STONE AND ANY SEDIMENT SHOULD BE REMOVED AND PROPERLY DISPOSED OF WHERE THE WALL NOT CREATE AN EROSION HAZARD. A IT IS ADVISABLE TO PROVIDE A , SEPARATE ENTRANCE TO May A MINIMUM REDUCE TRAFFIC ACROSS THE 12 EXIT AND WEAR AND \ KEEP A BROOM AND MAINTENANCE \\ SHOVEL CLOSE TO THE EXIT TO CLEAN THE EXIT LOCATION MUST SLOPE THE STREET AWAY FROM THE STREET OR STEPS MUST BE TAKEN (GRADING, DIVERSIONS, ETC) TO PREVENT RUNOFF FLOWING INTO THE STREET LAYER OF 2 " -3" WASHED STONE 8" FOUNDATION OF COMPACTED RUN STONE SECTION A -A' CONSTRUCTIONE ENTRANCE/E= DETAIL N To BANKFULL STAGE BLANKET KEYED 6 INCH MIN. ':.� 6 " -12" BACKFILLED AND COMPACTED EROSION CONTROL (COIR) MAT ANCHORING CROSS- SECTION VIEW APPROPRIATE SIZE ` 12"-24" RIP RAP PAD C O STREAM BANK MIN. THICKNESS 8" STREAM I I �O o CLASS A OR B JOU 6 " -� 2" O :... .:.... OJ�O EROSION CONTR FILTER FABRIC J STONE J� O( FOR DRAINAGE �S� MIN. OL O� 1 >Z1 C1f 1 �Y, (NON - WOVEN) EDGE ANCHORING SECTION A -A' ROCK CHECK DAM DETAIL NOT TO SCALE NOTES: AT THE DESIGNER'S DISCRETION, ALTERNATE DEWATERING STRUCTURES MAY BE USED (i.e. SEDIMENT TANKS, FILTER BOX, STRAW BALE /SILT FENSE PIT). HOWEVER, REGARDLESS OF THE DEWATERING STRUCTURE USED, ALL MUST BE SIZED AND OPERATE TO ALLOW ALL PUMPED WATER TO BE FILTERED TO PREVENT SEDIMENTS FROM ESCAPING THE SITE. PROFILE VIEW TEMPORARY DEWATERING STRUCTURE DETAIL NOT TO SCALE MATCH MAT EDGE ELEVATIO1 WITH BASE FLOW ELEVATION CROSS - SECTION 24" ECOSTAKE OR EQUIVALENT INSTALLED AT TOE OF SLOPE, CHANNEL EROSION CONTROL (COIR) MAT ANCHORING ISOMETRIC VIEW 0.. 1 FOOT MIN. EROSION CONTROL BLANKET BLANKET KEYED 6 INCH MIN. FLOW EROSION CONTROL MATTING, ANCHOR IN TRENCH ® BOTH TOP AND BOTTOM EDGES BOTH - I _ 3. BOTH 24" ECOSTAKE OR EQUIVALENT INSTALLED ABOVE TOE OF SLOPE EROSION CONTROL COIR) MAT ANCHORING PLAN VIEW l 12" & 24" /Xl AS DIRECTED NORTH AMERICAN GREEN EC ❑STAKES OR EQUIVALENT ECO -STAKE PROFILE VIEW NOTES: 1. THE COIR FIBER MAT SHALL BE USED TO STABILIZE THE NEWLY CONSTRUCTED CHANNEL FROM THE TOP OF BANK TO TOE OF SLOPE. 2. THE CHANNEL SIDE SLOPES SHALL BE FINE GRADED, SEEDED, FERTILIZED, AND LIMED PRIOR TO INSTALLING THE EROSION CONTROL BLANKET. 3. THE EROSION CONTROL BLANKET SHALL CONSIST OF A MACHINE - PRODUCED BLANKET MADE OF COCONUT FIBER. SEE SPECS. 4. THE STAPLES SHALL BE MADE OF WOOD SHAPED WITH LEGS 18" IN LENGTH AND A 1" CROWN. STAPLES SHALL BE SPACED ACCORDING TO THE BLANKET MANUFACTURERS INSTRUCTIONS TO ENSURE THE MATTING IS HELD FIRMLY IN PLACE. EROSION CONTROL MAT ANCHORING DETAILS NOT TO SCALE PRELIMINARY DRAWING - NOT RELEASED FOP, CONSTRUCTION 0) • r�"-i W w ■ � ,�"� cat U E � o 0 5 rr z z �� v, W a � d' q 0 v c W F-� 0 O o z U y z�� um d= It W o ,7 a oa = W0.i W d W o U' z W O y F z W P4 !4 4WD E-4 a a z cn A 0 Imo' F, W zz� �E z wxo z z E'' x d� W � O � a z O 6 6z z � ° U W a O z z U O z 0 �D U Q N� W w AQ V) c� a U PROJECT N0. DKU -8010 FILENAME: DKU8010 -D1 DESIGNED BY: AN G DRAWN BY: AN G SCALE: N.T.S. DATE: 10-26-2012 SHEET N0. D -1 E��� FILTER FABRIC FOR — DRAINAGE (NON - WOVEN) * FOR REPAIR OF SILT FENCE FAILURES, USE No. 57 WASHED S' MAX. STONE. FOR ANCHOR WHEN SILT VARIABLE AS DIRECTED BY THE ENGINEER FENCE IS PROTECTING CATCH BASIN. COMPACTED FILL BASEFLOW LINED WITH STONE \ r7 MIN. 10 GA. LINE WIRES / STEEL POST WOVEN WIRE FABRIC WARNING SIGN ORANGE, UV RESISTANT, HIGH - TENSILE STRENGTH, z POLY BARRICADE FABRIC (TYPICAL) - o M 7i -- GRADE 6" MIN. COVER OVER SKIRT EXTEND WIRE 6" MIN. INTO TRENCH AND ANCHOR SKIRT AS DIRECTED BY ENGINEER SIDE VIEW NOTES: MIN. 12 -1/2 GA. INTERMEDIATE WIRES D1it III I:� L =n.=1 HIGH - TENSILE STRENGTH, — POLY BARRICADE FABRIC (TYPICAL) GRADE 40 FRONT VIEW MS TREE PROTECTION AREA 16" DO NOT ENTER WARNING SIGN DETAIL NOTE: -USE SILT FENCE ONLY WHEN DRAINAGE AREA DOES NOT EXCEED 1/4 ACRE AND NEVER IN AREAS OF CONCENTRATED FLOW -END OF SILT FENCE NEEDS TO BE TURNED UPHILL. WARNING SIGNS TO BE MADE OF DURABLE, WEATHERPROOF MATERIAL LETTERS TO BE 3" HIGH MINIMUM, CLEARLY LEGIBLE AND SPACED AS DETAILED. SIGNS SHALL BE PLACED AT 50' MAXIMUM INTERVALS. PLACE A SIGN AT EACH END OF LINEAR TREE PROTECTION AND 50' ON CENTER THEREAFTER. FOR TREE PROTECTION AREAS LESS THAN 200' IN PERIMETER, PROVIDE NO LESS THAN ONE SIGN PER PROTECTION AREA. ATTACH SIGNS SECURELY TO FENCE POSTS AND FABRIC. MAINTAIN TREE PROTECTION FENCE THROUGHOUT DURATION OF PROJECT. ADDITIONAL SIGNS MAY BE REQUIRED BY CITY OF RALEIGH INSPECTIONS DEPARTMENT BASED ON ACTUAL FIELD CONDITIONS. PLACE A SIGN AT EACH END OF LINEAR TREE PROTECTION AND 50' ON CENTER THEREAFTER. NOTE: FOR TREE PROTECTION ONLY TREE PROTECTION FENCE DETAIL NOT TO SCALE 2' EXISTING 2' MIN. CHANNEL WIDTH MIN. TOP OF EXISTING BANK EXISTING CHANNEL BOTTOM CHANNEL �/ PLUG � 1' VARIES CROSS - SECTION B -B' 5' VARIES SECTION A -A' TOP OF EXISTING BANK — EXISTING CHANNEL BOTTOM TOP OF EXISTING BANK — EXISTING CHANNEL BOTTOM 1' EMPEMOUS CHANNEL PLUG DETAILS NOT TO SCALE WORKING AREA IMPERVIOUS SHEET PROFILE VIEW H"EMOUS DOE DETAIL NOT TO SCALE NOTES: TEMPORARY SPLASH PAD (SEE DETAIL, LOCATE (AS 1. EXCAVATION SHALL BE PERFORMED IN ONLY DRY SECTIONS OF CHANNEL UNLESS DIRECTED AT THE TIME OF DRAINAGE AREA EXCEEDS 6 SQUARE MILES. CONSTRUCTION) 2. IMPERVIOUS DIKES SHOULD BE USED TO ISOLATE WORK AREAS FROM STREAM FLOW. 3. THE CONTRACTOR SHALL NOT DISTURB MORE AREA THAN CAN BE STABILIZED IN ONE WORKING DAY. 4. EACH PUMP AROUND PUMP SHOULD ADEQUATELY CONVEY BASE FLOW VOLUMES. 5. PUMP AROUND OPERATIONS SHOULD NOT BE UNDERTAKEN IF SIGNIFICANT RAINFALL IS FORECAST IN THE CONSTRUCTIN PERIOD. PLAN VIEW CHANNEL PLUG NOTES: 1. CHANNEL PLUGS TO BE LOCATED AS SHOWN ON PLAN SHEETS 6 THROUGH 8 AND AT OTHER LOCATIONS AS DIRECTED BY THE CONSTRUCTION MANAGER. 2. CHANNEL PLUG MATERIAL SHALL BE OBTAINED FROM SELECT IMPERVIOUS MATERIAL AND, IF SUITABLE, MATERIAL FROM REMOVED ROCK CHECK DAMS. 3. SOIL SHALL BE COMPACTED TO 95% OF STANDARD PROCTOR. PUMP AROUND PUMP TYPICAL PUMP AROUND SETUP NOT TO SCALE LOG BUP'r^ 11 STREAMB, ATLEAS' C BOULDERS �1:3'_P►f+��l n N \c PLAN VIEW SPECIAL STILLING BASIN (AS DIRECTED AT THE TIME OF CONSTRUCTION) LOG 1 BELO' STRE, DEWATERING PUMP TEMPORARY I;_ FLEXIBLE o HOSE Z 10 EXISTING m CHANNEL v IMPERVIOUS DIKE (LOCATE AS DIRECTED AT THE TIME OF CONSTRUCTION) TOP OF STREAMBANK FLOW — STREAMBED TRANSPLANTS � S�OpE A0 X10 1I BURY END OF LOG 1 BELOW MAX POOL DEPTH PROFILE VIEW NOTES: 3URIED N 1. LOGS SHOULD BE ATLEAST 12" IN DIAMETER. AMBED RELATIVELY STRAIGHT, AND RECENTLY HARVESTED. LOG VAIN NOT TO SCALE 2. SOIL SHOULD BE COMPACTED WELL AROUND BURIED PORTIONS OF THE LOG. 3. LOGS SHOULD BE HELD IN PLACE BY LARGE BOULDERS BURIED IN THE BANK 4. TRANSPLANTS ARE PLACED ALONG THE TOP OF THE BANK OVER THE BURIED LOG VAIN TO PREVENT EROSION DURING HIGH FLOW EVENTS. FOOTER BOULDER PRELIMINARY DRAWING - NOT RELEASED FOR CONSTRUCTION 0 E • W w Z ° U W E � o U z z Lm M v, a W a q mz 0. a U E .� p n p W A c; cj Wpt H a a 3, O o W E-' Z L) o z aa> � ; w pq = LuA W d W o z c� z W O y a a E- 4 w P4� 4WD E-� a a z A 0 a E, W zzL) F z wxo � D z pq E- x d+ W � r- O � a z O z U z U ''A Q V� Q a U PROJECT N0. DKU -8010 FILENAME: DKU8010 -D1 DESIGNED BY: AN G DRAWN BY: AN G SCALE: N. T. S. DATE: 10-26-2012 SHEET N0. D -2 IMPERVIOUS DIKE SEQUENCE OF CONSTRUCTION FOR TYPICAL PUMP AROUND (LOCATE AS DIRECTED AT THE TIME OF 1. INSTALL SPECIAL STILLING BASINS AT THE DOWNSTREAM END OF THE DESIGNATED CONSTRUCTION) 2. PROJECT WORKING AREA. THE CONTRACTOR WILL INSTALL THE PUMP AROUND PUMP AND THE THE TEMPORARY 3. PIPING THAT WILL CONVEY THE BASE FLOW FROM UPSTREAM OF THE WORK SITE TO THE 4. SPECIAL STILLLING BASIN. INSTALL UPSTREAM IMPERVIOUS DIKE AND BEGIN PUMPING OPERATIONS FOR STREAM DIVERSION. 5. INSTALL THE DOWNSTREAM IMPERVIOUS DIKE AND PUMPING APPARATUS IF NEEDED TO 6. DEWATER THE ENTRAPPED AREA. THE PUMP AND HOSE FOR THIS PURPOSE SHALL BE OF TEMPORARY PIPING — SUFFICIENT SIZE TO DEWATER THE WORK AREA. THIS WATER WILL ALSO FLOW INTO A 7. SPECIAL STILLING BASIN. THE CONTRACTOR WILL PERFORM STREAM RESTORATION WORK IN ACCORDANCE WITH THE PLAN AND FOLLOWING THE GENERAL CONSTRUCTION SEQUENCE. THE CONTRACTOR WILL EXCAVATE ANY ACCUMULATED SEDIMENT AND DEWATER BEFORE REMOVAL OF THE IMPERVIOUS DIKE. REMOVE IMPERVIOUS DIKES, PUMPS, AND TEMPORARY FLEXIBLE HOSE /PIPING STARTING WITH THE DOWNSTREAM DIKE FIRST. ONCE THE WORKING AREA IS COMPLETED, REMOVE THE STILLING BASINS AND STABILIZE DISTURBED AREAS TO SPECIFICATIONS AS SHOWN ON PLANS. PLAN VIEW CHANNEL PLUG NOTES: 1. CHANNEL PLUGS TO BE LOCATED AS SHOWN ON PLAN SHEETS 6 THROUGH 8 AND AT OTHER LOCATIONS AS DIRECTED BY THE CONSTRUCTION MANAGER. 2. CHANNEL PLUG MATERIAL SHALL BE OBTAINED FROM SELECT IMPERVIOUS MATERIAL AND, IF SUITABLE, MATERIAL FROM REMOVED ROCK CHECK DAMS. 3. SOIL SHALL BE COMPACTED TO 95% OF STANDARD PROCTOR. PUMP AROUND PUMP TYPICAL PUMP AROUND SETUP NOT TO SCALE LOG BUP'r^ 11 STREAMB, ATLEAS' C BOULDERS �1:3'_P►f+��l n N \c PLAN VIEW SPECIAL STILLING BASIN (AS DIRECTED AT THE TIME OF CONSTRUCTION) LOG 1 BELO' STRE, DEWATERING PUMP TEMPORARY I;_ FLEXIBLE o HOSE Z 10 EXISTING m CHANNEL v IMPERVIOUS DIKE (LOCATE AS DIRECTED AT THE TIME OF CONSTRUCTION) TOP OF STREAMBANK FLOW — STREAMBED TRANSPLANTS � S�OpE A0 X10 1I BURY END OF LOG 1 BELOW MAX POOL DEPTH PROFILE VIEW NOTES: 3URIED N 1. LOGS SHOULD BE ATLEAST 12" IN DIAMETER. AMBED RELATIVELY STRAIGHT, AND RECENTLY HARVESTED. LOG VAIN NOT TO SCALE 2. SOIL SHOULD BE COMPACTED WELL AROUND BURIED PORTIONS OF THE LOG. 3. LOGS SHOULD BE HELD IN PLACE BY LARGE BOULDERS BURIED IN THE BANK 4. TRANSPLANTS ARE PLACED ALONG THE TOP OF THE BANK OVER THE BURIED LOG VAIN TO PREVENT EROSION DURING HIGH FLOW EVENTS. FOOTER BOULDER PRELIMINARY DRAWING - NOT RELEASED FOR CONSTRUCTION 0 E • W w Z ° U W E � o U z z Lm M v, a W a q mz 0. a U E .� p n p W A c; cj Wpt H a a 3, O o W E-' Z L) o z aa> � ; w pq = LuA W d W o z c� z W O y a a E- 4 w P4� 4WD E-� a a z A 0 a E, W zzL) F z wxo � D z pq E- x d+ W � r- O � a z O z U z U ''A Q V� Q a U PROJECT N0. DKU -8010 FILENAME: DKU8010 -D1 DESIGNED BY: AN G DRAWN BY: AN G SCALE: N. T. S. DATE: 10-26-2012 SHEET N0. D -2 NORTH r — . ..... .... ........... . . ........... �..... � .. , - = �..... / - \Xm CENTRAL WE 0 —�A — �f V ::. EXIS77NG J Lvol EXIS77NG LEGEND TP LD PLANTING ZONE - PIEDMONT BOTTOMLAND FOREST CONSERVATION EASEMENT LIMITS LIMITS OF DISTURBANCE TREE PROTECTION EXISTING 5' CONTOUR EXISTING 1' CONTOUR LIVE STAKES /WHIPS OR BRUSH CUTTINGS HARDWOOD TREE PINE TREE TREE REMOVAL LIMITS OF DISTURBANCE (WIDTH VARIES - REFER TO PLAN VIEW) CHANNEL WIDTH / J TOP OF BANK (BANKFULL WIDTH) FLOODPLAIN —i r FLOODPLAIN FLOODPLAIN 1 BANKFULL V STAGE r TYPICAL BASEFLOW v ELEVATION T COIR MATTING I'MCAL POOL LIMITS OF DISTURBANCE (WIDTH VARIES - REFER TO PLAN VIEW) CHANNEL WIDTH / BANKFULL V STAGE 3' TYPICAL BV OW ELEVATION ION V COIR MATTING 1YPICAL RIFFLE FLOODPLAIN �— EXISTING BARE ROOT SEEDLINGS J J TIE TO EXISTING 9 9 GRAPHIC SCALE 50 0 25 50 100 1 inch = 50 ft. PRELIMINARY DRAWING — NOT RELEASED FOR CONSrIRUCTION 0) E • W w .� � U RDA E c o U z z �z 0 En 0 W � A "• H P4 7, O 0 W E z o z :� d = uo m :� ■ W C,2 Cm W d W o U' z W [n O y G� a E zA z d a z Z -!4 z�z �W x W [/] � W O Q 0 -4 a 0-4 ,--1 z 0 a z O c� o F-1 z O z a a � U �D O rim) Qa PROJECT N0. DKU -8010 FILENAME: DKU8010 —LS1 DESIGNED BY: GH B DRAWN BY: ANG /GHB SCALE: 1 " -50' DATE: 10-26-2012 SHEET N0. LS -1 E��� GENERAL NOTES 1. ALL RIPARIAN BUFFER AREAS WITHIN THE LIMITS OF DISTURBANCE TO BE SEEDED TO SPECIFICATIONS UNLESS OTHERWISE NOTED. 2. ALL AREAS OUTSIDE OF THE LIMITS OF DISTURBANCE TO REMAIN IN THEIR NATURAL CONDITION, UNLESS OTHERWISE NOTED FOR REMOVAL DUE TO INVASIVE SPECIES. 3. CONTRACTOR SHALL VERIFY ALL DIMENSIONS IN FIELD. ANY DISCREPANCIES SHALL BE REPORTED TO THE OWNER AND DESIGNER, PRIOR TO PROCEEDING WITH THE WORK. 4. THE CONTRACTOR IS RESPONSIBLE FOR HAVING ALL UTILITIES LOCATED 48 HOURS PRIOR TO MOBILIZATION TO THE SITE. "CALL BEFORE YOU DIG." TOLL FREE NUMBER (800- 698 - 4949). 5. CONTRACTOR SHALL VERIFY LOCATIONS AND ELEVATIONS OF ALL EXISTING UTILITIES (IF ANY). PLANING NOTES 1. THE PLANTING STOCK SHALL BE GROWN WITHIN THE PIEDMONT REGION BY NURSERIES WITHIN 200 MILES OF THE PROJECT SITE. THE SEED SOURCES FOR THE PLANT MATERIAL SHALL ALSO BE FROM THE PIEDMONT REGION AND SHALL BE OBTAINED WITHIN 200 MILES OF THE PROJECT SITE. PLANT STOCK AND SEED MIXES MAY BE USED FROM NURSERIES BEYOND THE 200 MILE LIMIT WITH THE APPROVAL OF THE DESIGNER. 2. THE CONTRACTOR I.E. PLANTING SUPERVISOR INSTALLING THE VEGETATION SHALL HAVE ONE OF THE FOLLOWING QUALIFICATIONS / CERTIFICATIONS: CERTIFIED LANDSCAPE TECHNICIAN, CERTIFIED PLANT PROFESSIONAL, REGISTERED FORESTER, REGISTERED LANDSCAPE CONTRACTOR, OR CERTIFIED NURSERYMEN. 3. THE CONTRACTOR (I.E. PLANTING SUPERVISOR) WILL BE RESPONSIBLE FOR MANAGING ALL ACTIVITIES INVOLVING PERMANENT PLANTING, INCLUDING BUT NOT LIMITED TO THE FOLLOWING: SITE PREPARATION FOR PLANTING, EXOTIC PLANT REMOVAL (WHERE SPECIFIED), SEEDLING HANDLING AND STORAGE, PLANTING OPERATIONS, QUALITY CONTROL INSPECTIONS, AND MANAGING PLANT COMPETITION. 4. THE PLANTING PERIOD FOR THIS PROJECT SHALL OCCUR IN THE FALL OR WINTER (IF THE GROUND IS NOT FROZEN). PLEASE NOTE PLANTING SHALL NOT TAKE PLACE IF ANY OF THE FOLLOWING OCCUR: (1) THE TEMPERATURE IS BELOW 32 -F, (2) THE SOIL TO BE EXCAVATED FOR THE PLANT HOLE IS FROZEN, OR (3) THE SOIL TO BE USED FOR BACKFILLING IS FROZEN OR TOO WET. 5. FOR ALL PLANTED MATERIAL (BARE ROOT / CONTAINERIZED SEEDLINGS, LIVE STAKES, AND PERMANENT SEEDING) THE CONTRACTOR SHALL BE RESPONSIBLE FOR MAINTAINING (I.E. A WARRANTY) AN 80% SURVIVAL RATE FOR THE DURATION OF THE FIRST YEAR MONITORING PERIOD. ANY COSTS ASSOCIATED WITH REPLACING PERMANENT PLANTINGS THAT DO NOT SURVIVE THE FIRST YEAR SHALL BE THE RESPONSIBILITY OF THE CONTRACTOR. PLEASE NOTE THE ONE -YEAR MONITORING PERIOD BEGINS UPON ACCEPTANCE OF THE PERMANENT PLANTINGS BY THE DESIGNER. AT THE END OF THE FIRST YEAR MONITORING PERIOD, AN ON -SITE INSPECTION WILL BE CONDUCTED BETWEEN THE CONTRACTOR AND DESIGNER. AT THAT TIME, THE CONTRACTOR WILL BE DIRECTED ACCORDINGLY ON REPLACEMENT OF ANY NECESSARY PLANTINGS. 6. THE ONE -YEAR WARRANTY SHALL INCLUDE MORTALITY AND POOR GROWTH DEFECTS, BUT SHALL NOT INCLUDE DEFECTS RESULTING FROM ABUSE BY OTHER PARTIES AND ABNORMAL WEATHER CONDITIONS. PLEASE NOTE THE 80% SURVIVAL RATE IS A MINIMUM STANDARD AND THE CONTRACTOR MAY PROVIDE ADDITIONAL MEASURES THEY DETERMINE WILL BE BENEFICIAL TO PLANT SURVIVABILITY. ANY ADDITIONAL MEASURES WILL BE CONSIDERED PART OF THE 80% SURVIVAL CLAUSE AND WILL NOT CONSTITUTE A CHANGE ORDER. THIS MAY INCLUDE, BUT IS NOT LIMITED TO, SOIL AMENDMENTS, IRRIGATION, AND MULCH. 7. IN ORDER TO ELIMINATE COMPETITION WITHIN THE BUFFER RESTORATION AREAS, THE EXISTING VEGETATION MAY BE SPRAYED WITH AN AQUATIC HERBICIDE. THE PARTY APPLYING THE HERBICIDE SHALL BE PROPERLY LICENSED IN THE STATE OF NORTH CAROLINA. PLEASE REFER TO "INVASIVE SPECIES CONTROL" FOR ADDITIONAL INFORMATION. B. AT THE CONTRACTOR'S DISCRETION, THE PROPAGATION METHOD LISTED FOR EACH PLANT MAY BE ALTERED IF IT IS LIKELY TO IMPROVE SURVIVABILITY. THIS WILL BE SOLELY AT THE CONTRACTOR'S DISCRETION AND WILL THEREFORE NOT BE CONSIDERED A CHANGE ORDER. ALSO, NO CHANGE IN THE PLANTING DENSITY WILL BE GIVEN. 9. THE CORRECT SPACING OF VEGETATION WITHIN THE PLANTING ZONE SHOULD BE CHECKED BY THE PLANTING SUPERVISOR ON A REGULAR BASIS. PLANT DISTRIBUTTION NOTES 1. PLANT SPACING SHALL BE BASED ON A 8' X 8' GRID. THIS SPACING REFERS TO PLANTING THE PLANTS EACH 8 FEET APART FROM EACH OTHER IN ALL DIRECTIONS. THIS SPACING DOES NOT RELATE TO PLANTING DISTANCE AT THE ZONE BOUNDARY. 2. PLANT SPACING SHALL TAKE INTO ACCOUNT EXISTING TREES WITHIN THE RIPARIAN BUFFER. 3. PLANT DISTRIBUTION SHALL BE RANDOM AND IS DEFINED AS FOLLOWS: RANDOM DISTRIBUTION - TAKE ALL PLANTS AND MIX THE PLANTS SO THAT THEY ARE ALL PLANTED RANDOMLY. IF DONE PROPERLY, SOMETIMES TWO OR MORE OF THE SAME SPECIES WILL BE PLANTED ADJACENT TO EACH OTHER AND OTHER TIMES THERE MAY ONLY BE ONE PLANT OF A SPECIES COMPLETELY SURROUNDED BY ONE OR MORE OTHER SPECIES. THE PLANTING CONTRACTOR SHALL ALSO RANDOMLY DISTRIBUTE CONTAINERIZED AND BARE ROOT / TUBLING PLANTINGS. IN GENERAL, 50% OF EACH PLANTING ZONE (7 TOTAL) SHALL BE CONTAINERIZED PLANTINGS AND 50% SHALL BE BARE ROOT / TUBLING PLANTINGS. 4. THE FIRST PLANTING ROW SHOULD BEGIN 1% OF THE PLANTING DISTANCE IN FROM THE OUTER EDGE OF THE PLANTING ZONE. THE ENTIRE ZONE SHALL BE PLANTED FULLY AT THE DESIGNATED SPACING. THE PLANTING ZONE IS TO BE PLANTED TO WITHIN 1% THE DESIGNATED PLANT SPACING DISTANCE FROM ANY EDGE OF THE ZONE. IN ALL CASES, PLANTS SHALL BE PLANTED UNTIL PLANTS ARE PLACED TO WITHIN A MAXIMUM OF 3/4 OF THE PLANT SPACING DISTANCE FROM THE EDGE OF THE PLANTING ZONE. 5. THE CORRECT SPACING OF VEGETATION WITHIN THE PLANTING ZONE SHOULD BE CHECKED BY THE PLANTING SUPERVISOR ON A REGULAR BASIS DURING PLANTING. DOCUMENTATION OF EACH INSPECTION SHALL BE KEPT BY THE SUPERVISOR AND SHALL BE MADE AVAILABLE FOR INSPECTION UPON REQUEST. PLEASE NOTE ANY COSTS ASSOCIATED WITH CHECKING THE PLANT SPACING / DOCUMENTATION ARE THE RESPONSIBILITY OF THE CONTRACTOR. 6. THERE SHALL NOT BE ANY BARE ROOT SEEDLINGS PLANTED WITHIN COIR MATTING. SPECIES SELECTION 1. THE PERMANENT PLANTING SPECIES SELECTION SHALL BE BASED ON THE "TREE" AND /OR "SMALL TREE /SHRUB" SPECIES LISTED WITHIN THE PLANTING ZONE TABLE ON SHEET LS -1. PLANT SUBSTITUTES WILL NOT BE CONSIDERED FOR THIS PROJECT AS FLEXIBILITY HAS BEEN INCLUDED BELOW IN NOTES #3 AND #4. 2. THE PERMANENT PLANTINGS WILL BE PLANTED IN THE DESIGNATED PLANTING ZONES ONLY (SEE HATCHED AREAS ON SHEET LS -1). PLEASE NOTE IT IS THE CONTRACTORS RESPONSIBILITY TO ENSURE THAT AN ADEQUATE NUMBER OF PLANTINGS ARE AVAILABLE DURING THE SPECIFIED PLANTING PERIOD. 3. PRIOR TO PLANTING, A WRITTEN LIST (SIGNED BY THE PLANTING SUPERVISOR) OF THE ACTUAL SPECIES PURCHASED FROM THE NURSERY (AND IN WHAT PERCENTAGES OF THE TOTAL) MUST BE DELIVERED TO THE DESIGNER FOR REVIEW AND APPROVAL. 4. THE PLANTING ZONES SHALL BE PLANTED WITH AT LEAST SIX OF THE LISTED SPECIES AS DEPICTED ON THE PLANTING ZONE TABLE LISTED ON THIS SHEET. NO MORE THAN 20% OF ANY ONE SPECIES SHALL MAKE UP EACH PLANTING ZONE. NO SPECIES SHALL MAKE UP LESS THAN 10% OF THE EACH PLANTING ZONE. 5. THE PLANTING SUPERVISOR SHALL ENSURE THAT THE MINIMUM PLANTING DENSITY OF 436 TO 681 INDIVIDUAL TREE SPECIES PER ACRE IS MET WITHIN EACH PLANTING ZONE. 6. PRIOR TO SEEDING /APPLICATION, THE CONTRACTOR SHALL PROVIDE THE DESIGNER WITH SEED MIX INFORMATION, INCLUDING BUT NOT LIMITED TO: GERMINATION RATES, NOXIOUS WEED SEEDS, AND DATE / LOCATION OF HARVEST. THIS INFORMATION MUST BE REVIEWED / APPROVED BY THE DESIGNER. 7. AFTER PLANTING, A WRITTEN LIST (SIGNED BY THE PLANTING SUPERVISOR) OF THE ACTUAL SPECIES INSTALLED (AND IN WHAT PERCENTAGES OF THE TOTAL) MUST BE DELIVERED TO THE DESIGNER FOR REVIEW BEFORE FINAL APPROVAL (I.E. - START OF THE ONE -YEAR MONITORING PERIOD) OF THE PLANTING WILL BE ISSUED. GRADING AND SOIL PREPARATION NOTES 1. THE TOPSOIL MUST BE STOCKPILED. 2. ANY AREAS ON THE SITE THAT ARE COMPACTED DURING THE CONSTRUCTION PROCESS, MUST BE DEEP TILLED TO ENSURE THAT THE ROOT GROWTH OF THE PLANTS WILL NOT BE IMPEDED BY COMPACTED SOIL. THIS DOES NOT INCLUDE ANY AREAS THAT ARE PURPOSEFULLY COMPACTED IN THE SUBSOIL TO PREVENT THE DOWNWARD MOVEMENT OF WATER. 3. ALL TOPSOIL SHALL BE STOCKPILED SEPARATELY FROM ANY SUBSOIL MATERIAL. 4. ANY AREA THAT HAS FILL APPLIED TO IT OR ANY AREA EXCAVATED TO THE SUBSOIL MUST BE TOP DRESSED WITH AT LEAST 4 INCHES OF STOCKPILED TOPSOIL. BEFORE THE APPLICATION OF TOPSOIL, THE SURFACE MUST BE TILLED TO ENSURE GOOD INTERACTION BETWEEN THE TOPSOIL AND THE SUBSOIL. 5. UPON COMPLETION OF FINAL GRADING, THE PLANTING SUPERVISOR SHALL CONDUCT A SITE ASSESSMENT TO DETERMINE IF THE SOIL IS APPROPRIATELY PREPARED FOR PLANTING. IF ANY PROBLEMS EXIST, THEY SHALL BE NOTED AND CORRECTED BEFORE PLANTING MAY COMMENCE. CONSTRUCTION METHODS BARE ROOT / CONTAINERIZED SEEDLINGS 1. THE STORAGE, HANDLING, AND PLANTING OF BARE ROOT / CONTAINERIZED SEEDLINGS WILL FOLLOW THE PROCEDURES OUTLINED IN THE NC DIVISION OF FOREST RESOURCES (NCFS) "POCKET GUIDE TO SEEDLING CARE AND PLANTING STANDARDS ", 6th EDITION. JANUARY 2007. ONLY THE HIGHEST QUALITY BARE ROOT / CONTAINERIZED SEEDLINGS SHALL BE PLANTED. THE PLANTED SEEDLINGS SHALL HAVE WELL - DEVELOPED FIBROUS ROOT SYSTEMS AND HEALTHY BUDS. 2. ALL BARE ROOT / CONTAINERIZED SEEDLINGS SHALL BE DORMANT AT TIME OF ACQUISITION AND PLANTING. 3. ALL BARE ROOT / CONTAINERIZED SPECIES SHALL HAVE A MINIMUM OF FOUR (4) FIRST ORDER LATERAL ROOTS (FOLR) THAT EXCEED 1 MM IN DIAMETER. SEEDLINGS THAT DO NOT POSSESS THE MINIMUM NUMBER OF FOLR SHALL BE CULLED FROM PLANTING. BARE ROOT / CONTAINERIZED TREE SPECIES SEEDLINGS THAT WILL FORM THE CANOPY MUST HAVE A MINIMUM ROOT COLLAR DIAMETER (RCD) OF 3/8 INCH. SEEDLINGS WITH LESSER RCD'S CULLED FROM PLANTING. 4. THE CONTRACTOR SHALL PAY CLOSE ATTENTION TO THE HANDLING OF THE PLANT MATERIAL DURING CONSTRUCTION TO PREVENT INJURY TO OR DRYING OUT OF THE TRUNK, BRANCHES, OR ROOTS. FREEZING OF THE PLANT ROOTS SHALL ALSO BE PREVENTED. 5. UNLESS THEY ARE PROMPTLY PLANTED IMMEDIATELY FOLLOWING DELIVERY TO THE PROJECT SITE, ALL PLANTS WITH BARE ROOTS SHALL BE HEELED -IN CONSTANTLY WITHIN MOIST SOIL OR SAWDUST (IN A MANNER CONSISTENT WITH GENERALLY ACCEPTED HORTICULTURAL PRACTICES). 6. IF THE PLANTING AREA IS LOCATED ON COMPACTED SOIL, THE SOIL IN THIS AREA SHALL BE LOOSENED TO A MINIMUM DEPTH OF 1 -FOOT. SEEDLINGS MAY BE PLANTED IN HOLES MADE BY A MATTOCK, DIBBLE, PLANTING BAR, OR OTHER PROVIDED THE MEANS ARE APPROVED BY THE DESIGNER. ROOT STOCK SHALL BE PLANTED IN A VERTICAL POSITION WITH THE ROOT COLLAR LOCATED APPROXIMATELY 0.5- INCHES BELOW THE SOIL SURFACE. THE PLANTING TRENCH OR HOLE SHALL BE WIDE ENOUGH TO ALLOW ROOTS TO SPREAD OUT AND DOWN WITHOUT J- ROOTING. AFTER PLANTING, THE SOIL AROUND THE SHRUB OR TREE SHALL BE TAMPED FIRMLY TO REMOVE POTENTIAL AIR POCKETS. 7. TO PROMOTE PROPER GROWTH, THE CONTRACTOR SHALL DEEPLY TILL AND SCARIFY THE PLANTING ZONES TO ENSURE THAT THE ROOT GROWTH OF THE PLANTS WILL NOT BE IMPEDED BY COMPACTED SOIL. ANY SUB - SURFACE HARDPANS WITHIN THE PLANTING ZONE SHALL BE ELIMINATED. RIPPING, DISKING, OR RAKING SHALL BE PERFORMED IN ALL AREAS TO BE SEEDED TO A MINIMUM DEPTH OF 3 INCHES TO 4 INCHES. B. STRAW MULCH SHALL BE PLACED: (1) AROUND THE BASE OF EACH SEEDLING /PLANT IN A MINIMUM 4" TO 6" LAYER AND (2) OVER ALL SEEDED AREAS. 9. IN SEEDED AREAS, TO LIMIT EROSION POTENTIAL, THE CONTRACTOR SHALL LIMIT SUB -GRADE AND FINISH GRADE PREPARATION TO AREAS THAT WILL BE PLANTED IMMEDIATELY. PREPARED AREAS SHALL BE MOISTENED PRIOR TO SEEDING WHEN THE SOIL IS DRY, BUT CARE SHALL BE TAKEN TO NOT CREATE MUDDY CONDITIONS. 10. THE PLANTING ZONE SHALL NOT BE GRADED LEVEL. MICROTOPOGRAPHY IS DESIRED TO PROMOTE DIFFUSE FLOW AND SURFACE WATER STORAGE. MICROTOPOGRAPHICAL DEPRESSIONS SHALL NOT BE GREATER THAN 6 INCHES IN DEPTH. 11. UPON COMPLETION OF FINAL GRADING, THE PLANTING SUPERVISOR SHALL CONDUCT A SITE ASSESSMENT TO DETERMINE IF THE SOIL IS APPROPRIATELY PREPARED FOR PLANTING. IF ANY PROBLEMS EXIST, THEY SHALL BE NOTED AND CORRECTED BEFORE PLANTING MAY COMMENCE. LIVE STAKES 1. AREAS NOTED AS LIVE STAKES WITHIN THE PLANTING ZONE SHALL BE PLANTED WITH SILKY DOGWOOD (CORNUS AMOMUM), SILKY WILLOW (SALIX SERICEA), AND BLACK WILLOW (SALIX NIGRA). 2. ONE LIVE STAKE SPECIES PER LIVE STAKE AREA. ALTERNATE SPECIES PER LIVE STAKE AREA. 3. ALL LIVE STAKES SHALL BE DORMANT AT TIME OF ACQUISITION AND PLANTING. 4. LIVE STAKES SHALL BE 1/2 -2" (12 -50 MM) IN DIAMETER. LIVE STAKES SHALL ALSO BE 2 - 4 FEET (0.6 - 1 METER) IN LENGTH. 5. DURING PREPARATION, THE BASAL ENDS OF THE LIVE STAKES SHALL BE CLEANLY CUT AT AN ANGLE TO FACILITATE EASY INSERTION INTO THE SOIL, WHILE THE TOPS SHALL BE CUT SQUARE OR BLUNT FOR TAMPING. ALL LIMBS SHALL BE REMOVED FROM THE SIDES OF THE LIVE CUTTING PRIOR TO INSTALLATION. 6. CUTTINGS FOR LIVE STAKES SHALL BE HARVESTED IN A MANNER SUCH THAT THEY ARE CUT, IMMEDIATELY PUT INTO WATER TO BE SOAKED FOR TEN DAYS, AND THEN PLANTED IMMEDIATELY AFTER THE TEN DAYS ARE COMPLETED. CUTTINGS SHALL REMAIN WET UNTIL THEY ARE PLANTED. OUTSIDE STORAGE LOCATIONS SHOULD BE CONTINUALLY SHADED AND PROTECTED FROM WIND AND DIRECT SUNLIGHT. 7. LIVE STAKES SHALL BE TAMPED AT AN ANGLE INTO THE GROUND SURFACE WITH A DEAD BLOW HAMMER, WITH BUDS ORIENTED IN AN UPWARD DIRECTION. STAKES SHOULD BE TAMPED UNTIL APPROXIMATELY 3/4 OF THE STAKE LENGTH IS WITHIN THE GROUND. ANY STAKES THAT ARE SPLIT OR DAMAGED DURING INSTALLATION SHALL BE REMOVED AND REPLACED. 8. THE AREA AROUND EACH LIVE STAKE SHALL BE COMPACTED BY FOOT AFTER THE LIVE STAKE HAS BEEN INSTALLED. 9. ONE TO TWO INCHES SHALL BE CUT CLEANLY OFF OF THE TOP OF EACH LIVE STAKE (WITH LOPPERS) AT AN ANGLE OF APPROXIMATELY 15 DEGREES FOLLOWING INSTALLATION. SEQUENCE OF PLANTIINiG EVENTS THE CONTRACTOR IS RESPONSIBLE FOR THE FOLLOWING GENERAL SEQUENCE OF CONSTRUCTION: 1. SET UP STAGING AREAS AND ACCESS ROADS. INSTALL CONSTRUCTION ENTRANCES, SILT FENCE, AND SILT FENCE OUTLETS (AS REQUIRED). SEE EROSION AND SEDIMENT CONTROL DETAILS FOR ADDITIONAL INSTRUCTIONS. 2. CONTRACTOR TO STOCKPILE AND STAGE MATERIALS ONLY AT THE LOCATIONS SHOWN ON THE PLANS UNLESS OTHERWISE APPROVED BY THE DESIGNER. NO WASTE STOCKPILING IS ALLOWED. ALL WASTE MATERIALS MUST BE REMOVED FROM THE FLOODPLAIN AND THE PROJECT SITE. 3. REMOVE INVASIVE SPECIES WHERE PRESENT. STOCKPILE BAGGED INVASIVE SPECIES AND HAUL OFF -SITE (SEE INVASIVE SPECIES CONTROL THIS SHEET). 4. PREPARE PLANTING AREAS AS NEEDED. APPLY TEMPORARY OR PERMANENT SEED. SEE PLANTING NOTES AND SEEDING NOTES THIS SHEET FOR ADDITIONAL INSTRUCTIONS. 5. PLANT SITE ACCORDING TO THE PLANTING SPECIFICATIONS. 6. IN SEEDED AREAS, TO LIMIT EROSION POTENTIAL, THE CONTRACTOR SHALL LIMIT SUB -GRADE AND FINISH GRADE PREPARATION TO AREAS THAT WILL BE PLANTED IMMEDIATELY. PREPARED AREAS SHALL BE MOISTENED PRIOR TO SEEDING WHEN THE SOIL IS DRY, BUT CARE SHALL BE TAKEN TO NOT CREATE MUDDY CONDITIONS. 7. COMPLETE ALL FINAL SITE WORK NECESSARY TO COMPLETE THE PROJECT. TEMPORARY SEEDING TEMPORARY SEEDING SHALL BE APPLIED AS NEEDED DURING CONSTRUCTION TO STABILIZE BARE OR DISTURBED AREAS OF SOIL AND AT THE COMPLETION OR ALL GRADING AND EARTHWORK ACTIVITIES WITHIN A PARTICULAR AREA OF THE SITE. PERMANENT SEED MAY BE DISTRIBUTED WITH TEMPORARY SEED UPON THE FINAL APPLICATION OF TEMPORARY SEED. SEEDBED PREPARATION APPLY LIME ACCORDING TO SOIL TEST RECOMMENDATIONS. SOILS WITH A PH OF 6 OR HIGHER NEED NOT BE LIMED. IF RECENT TILLAGE OPERATIONS HAVE RESULTED IN A LOOSE SURFACE, ADDITIONAL ROUGHENING MAY NOT BE REQUIRED EXCEPT TO BREAK UP LARGE CLODS. IF RAINFALL CAUSES THE SURFACE TO BECOME SEALED OR CRUSTED, LOOSEN IT JUST PRIOR TO SEEDING BY DISKING, RAKING, HARROWING, OR OTHER SUITABLE METHODS. SEEDING METHODS 1. EVENLY APPLY SEED USING A CYCLONE SEEDER, DRILL, CULTIPACKER SEEDER, OR HYDROSEEDER. THIS MUST BE DONE WITHIN 48 HOURS OF LAND DISTURBING ACTIVITIES. 2. MULCH WITH CLEAN WHEAT STRAW. 3. AFTER SEEDING, APPLY MULCH TO AREAS UNDER HARSH CONDITIONS SUCH AS AREAS THAT HAVE BEEN GRADED OR THOSE WHICH WILL RECEIVE CONCENTRATED FLOWS. AREAS CONSIDERED TO BE UNDER HARSH CONDITIONS WILL BE CONSIDERED THE AREAS GRADED FOR THE WETLAND VALLEY. 4. RESEED AND MULCH AREAS WHERE SEEDLING EMERGENCE IS LESS THAN 80% COVERAGE, OR WHERE EROSION OCCURS, AS SOON AS POSSIBLE. DO NOT MOW. PROTECT FROM TRAFFIC AS MUCH AS POSSIBLE. MAINTENANCE PLAN 1. ALL EROSION AND SEDIMENT CONTROL PRACTICES WILL BE CHECKED FOR STABILITY AND OPERATION FOLLOWING EVERY RUNOFF - PRODUCING RAINFALL BUT IN NO CASE LESS THAN ONCE EVERY WEEK. ANY NEEDED REPAIRS WILL BE MADE IMMEDIATELY TO MAINTAIN ALL PRACTICES AS DESIGNED. 2. SEDIMENT WILL BE REMOVED FROM BEHIND THE SEDIMENT FENCES WHEN IT BECOMES APPROXIMATELY SIX (6) INCHES DEEP AT THE FENCE. THE SEDIMENT FENCE WILL BE REPAIRED AS NECESSARY TO MAINTAIN A BARRIER. ALL SEEDED AREAS WILL BE FERTILIZED, RESEEDED AS NECESSARY, AND MULCHED ACCORDING TO SPECIFICATIONS IN THE VEGETATIVE PLAN. BECAUSE THE GOAL OF THE RESTORATION IS TO ESTABLISH A SELF MAINTAINING VEGETATED CORRIDOR, MAINTENANCE SHOULD BE MINIMAL. TEMPORARY EROSION CONTROL SEEDING PLANTING ZONE PIEDMONT BOTTOMLAND FOREST SEEDING DATES ECOREGION SPECIES SPECIES COMMON NAME SOIL AMENDMENTS GROWTH HABIT PROPAGATION METHOD SPACING FRAXINUS PENNSYLVANICA GREEN ASH SECALE CEREALE TRIFOLIUM INCARNATUM TREE BARE ROOT / CONTAINERIZED 8 X 8 PLATANUS OCCIDENTALIS SYCAMORE SECALE CEREALE TRIFOLIUM INCARNATUM TREE BARE ROOT / CONTAINERIZED 8 X 8 QUERCUS PAGODA CHERRYBARK OAK TREE BARE ROOT / CONTAINERIZED 8 X 8 BETULA NIGRA RIVER BIRCH TREE BARE ROOT / CONTAINERIZED 8 X 8 QUERCUS NIGRA WATER OAK TREE BARE ROOT / CONTAINERIZED 8 X 8 QUERCUS LYRATA OVERCUP OAK TREE BARE ROOT / CONTAINERIZED 8 X 8 QUERCUS MICHAUXII SWAMP CHESTNUT OAK TREE BARE ROOT / CONTAINERIZED 8 X 8 QUERCUS PHELLOS WILLOW OAK TREE BARE ROOT / CONTAINERIZED 8 X 8 QUERCUS LAURIFOLIA LAUREL OAK TREE BARE ROOT / CONTAINERIZED 8 X 8 QUERCUS ALBA WHITE OAK TREE BARE ROOT / CONTAINERIZED 8 X 8 QUERCUS FALCATA SOUTHERN RED OAK TREE BARE ROOT / CONTAINERIZED 8 X 8 ACER BARBATUM SOUHTERN SUGAR MAPLE TREE BARE ROOT / CONTAINERIZED 8 X 8 ULMUS AMERICANA AMERICAN ELM TREE BARE ROOT / CONTAINERIZED 8 X 8 LIRIODENDRON TULIPIFERA TULIP POPLAR TREE BARE ROOT CONTAINERIZED 8 X 8 FAGUS GRANDIFOLIA AMERICAN BEECH TREE BARE ROOT / CONTAINERIZED 8 X 8 CORNUS FLORIDA FLOWERING DOGWOOD SMALL TREE SHRUB BARE ROOT / CONTAINERIZED 8 X 8 ALNUS SERRULATA TAG ALDER SMALL TREE /SHRUB BARE ROOT / CONTAINERIZED 8 X 8 ASIMINA TRILOBA PAWPAW SMALL TREE SHRUB BARE ROOT / CONTAINERIZED 8 X 8 MYRICA CERIFERA WAX MYRTLE SMALL TREE /SHRUB BARE ROOT / CONTAINERIZED 8 X 8 CARPINUS CAROLINIANA IRONWOOD SMALL TREE /SHRUB BARE ROOT / CONTAINERIZED 8 X 8 MAGNOLIA VIRGINIANA SWEET BAY SMALL TREE /SHRUB BARE ROOT / CONTAINERIZED 8 X 8 ARONIA ARBUTIFOLIA RED CHOKEBERRY SMALL TREE /SHRUB BARE ROOT / CONTAINERIZED 8 X 8 ILEX VERTICILLATA WINTERBERRY SMALL TREE /SHRUB BARE ROOT / CONTAINERIZED 8 X 8 CEPHALANTHUS OCCIDENTALIS BUTTONBUSH SMALL TREE /SHRUB BARE ROOT / CONTAINERIZED 8 X 8 LINDERA BENZOIN SPICEBUSH SMALL TREE /SHRUB BARE ROOT / CONTAINERIZED 8 X 8 LEUCOTHOE RACEMOSA FETTERBUSH SMALL TREE /SHRUB BARE ROOT / CONTAINERIZED 8 X 8 AESCULUS SYLVATICA PAINTED BUCKEYE SMALL TREE /SHRUB BARE ROOT / CONTAINERIZED 8 X 8 ILEX OPACA AMERICAN HOLLY SMALL TREE /SHRUB BARE ROOT / CONTAINERIZED 8 X 8 TEMPORARY SEEDING TEMPORARY SEEDING SHALL BE APPLIED AS NEEDED DURING CONSTRUCTION TO STABILIZE BARE OR DISTURBED AREAS OF SOIL AND AT THE COMPLETION OR ALL GRADING AND EARTHWORK ACTIVITIES WITHIN A PARTICULAR AREA OF THE SITE. PERMANENT SEED MAY BE DISTRIBUTED WITH TEMPORARY SEED UPON THE FINAL APPLICATION OF TEMPORARY SEED. SEEDBED PREPARATION APPLY LIME ACCORDING TO SOIL TEST RECOMMENDATIONS. SOILS WITH A PH OF 6 OR HIGHER NEED NOT BE LIMED. IF RECENT TILLAGE OPERATIONS HAVE RESULTED IN A LOOSE SURFACE, ADDITIONAL ROUGHENING MAY NOT BE REQUIRED EXCEPT TO BREAK UP LARGE CLODS. IF RAINFALL CAUSES THE SURFACE TO BECOME SEALED OR CRUSTED, LOOSEN IT JUST PRIOR TO SEEDING BY DISKING, RAKING, HARROWING, OR OTHER SUITABLE METHODS. SEEDING METHODS 1. EVENLY APPLY SEED USING A CYCLONE SEEDER, DRILL, CULTIPACKER SEEDER, OR HYDROSEEDER. THIS MUST BE DONE WITHIN 48 HOURS OF LAND DISTURBING ACTIVITIES. 2. MULCH WITH CLEAN WHEAT STRAW. 3. AFTER SEEDING, APPLY MULCH TO AREAS UNDER HARSH CONDITIONS SUCH AS AREAS THAT HAVE BEEN GRADED OR THOSE WHICH WILL RECEIVE CONCENTRATED FLOWS. AREAS CONSIDERED TO BE UNDER HARSH CONDITIONS WILL BE CONSIDERED THE AREAS GRADED FOR THE WETLAND VALLEY. 4. RESEED AND MULCH AREAS WHERE SEEDLING EMERGENCE IS LESS THAN 80% COVERAGE, OR WHERE EROSION OCCURS, AS SOON AS POSSIBLE. DO NOT MOW. PROTECT FROM TRAFFIC AS MUCH AS POSSIBLE. MAINTENANCE PLAN 1. ALL EROSION AND SEDIMENT CONTROL PRACTICES WILL BE CHECKED FOR STABILITY AND OPERATION FOLLOWING EVERY RUNOFF - PRODUCING RAINFALL BUT IN NO CASE LESS THAN ONCE EVERY WEEK. ANY NEEDED REPAIRS WILL BE MADE IMMEDIATELY TO MAINTAIN ALL PRACTICES AS DESIGNED. 2. SEDIMENT WILL BE REMOVED FROM BEHIND THE SEDIMENT FENCES WHEN IT BECOMES APPROXIMATELY SIX (6) INCHES DEEP AT THE FENCE. THE SEDIMENT FENCE WILL BE REPAIRED AS NECESSARY TO MAINTAIN A BARRIER. ALL SEEDED AREAS WILL BE FERTILIZED, RESEEDED AS NECESSARY, AND MULCHED ACCORDING TO SPECIFICATIONS IN THE VEGETATIVE PLAN. BECAUSE THE GOAL OF THE RESTORATION IS TO ESTABLISH A SELF MAINTAINING VEGETATED CORRIDOR, MAINTENANCE SHOULD BE MINIMAL. TEMPORARY EROSION CONTROL SEEDING SEASON SEEDING DATES ECOREGION SPECIES SCIENTIFIC NAME RATE (LB /ACRE) SOIL AMENDMENTS MAINTENANCE FALL AUGUST 15 - JANUARY 1 PIEDMONT RYE GRAIN CRIMSON CLOVER SECALE CEREALE TRIFOLIUM INCARNATUM 120 FOLLOW SOIL TESTS FOR LIME SEE TEMPORARY SEEDING MAINTENANCE PLAN LATE WINTER AND EARLY SPRING JANUARY 1 - MAY 1 PIEDMONT RYE GRAIN CRIMSON CLOVER SECALE CEREALE TRIFOLIUM INCARNATUM 120 SUMMER MAY 1 - AUGUST 15 PIEDMONT GERMAN MILLET ECHINOCHLOA CRUSGALLI j 40 KtrtrctNl:t: Jfn Olen, M. u. ea. IJaa. Norm l:aronna trOBion ana Jeainnent l:ontroi morning ana ueBign Manual. Kamign, Nl:: Norm uaronno Jealfnentation l:ontroi LoOM MIBBion, Norm Carolina , and the North Carolina Cooperative Extension Service. 511 pp. Section 6.10.1. PERMANENT SEED MIX SPECIES SPECIES (COMMON NAME) MIN. PERCENTAGE Panicum rigidulum (Redtop Panicgrass) 25 Panicum anceps (Beaked Panicgrass) 21 Chasmanthium latifolium (River Oats) 20 Elymus virginicus (Virginia Wildrye) 20 Sorghastrum nutans (Indiangrass) 10 Juncus coriaceous (Leathery Rush) 2 Agrostis hyemalis (Winter Bentgrass) 2 TOTAL = 100 PERMANENT SEEDING 1. PERMANENT SEEDING WILL BE REQUIRED ABOVE THE BANKFLOW ELEVATION ON THE STREAM BANKS, IN THE RIPARIAN BUFFER, REMNANTS OF THE FILLED CHANNEL, FLOODPLAIN POOL AREAS, AND ALL STAGING AND STOCKPILING AREAS. ONLY CERTIFIED SEED SHALL BE ALLOWED. 2. PERMANENT SEEDING WILL BE REQUIRED ONCE ALL PLANTING OF TREE AND SHRUB SPECIES HAS BEEN COMPLETED WITHIN THE PLANTING ZONE. PERMANENT SEEDING SHALL OCCUR IN CONJUNCTION WITH TEMPORARY SEEDING WHEN APPLICABLE. 3. PERMANENT SEED MIX SHALL CONTAIN THE LISTED SPECIES AT THE MINIMUM PERCENTAGE SHOWN. 4. SPECIES FOR THE PERMANENT SEED MIX WERE DERIVED FROM RIPARIAN BUFFER MIX ERNMX -307 FROM ERNST CONSERVATION SEEDS. 5. PERMANENT SEED MIX SHALL CONTAIN A MINIMUM 96 % PURITY RATE. 6. SEE TEMPORARY SEEDING GUIDELINES FOR SEEDBED PREPARATION. 7. SEED MAY BE APPLIED WITH TEMPORARY SEED OR OVER SEEDED WHEN TEMPORARY SEEDING HAS BEEN COMPLETED. 8. MULCH IF PERMANENT SEED IS SOWN DURING WINTER OR THE TEMPORARY PLANTING IS NO LONGER PRESENT. 9. RESEED AND MULCH AREAS WHERE SEEDLING EMERGENCE IS LESS THAN 80% COVERAGE, OR WHERE EROSION OCCURS, AS SOON AS POSSIBLE. DO NOT MOW. PROTECT FROM TRAFFIC AS MUCH AS POSSIBLE. 10. SEE TEMPORARY SEEDING GUIDELINES FOR MAINTENANCE PLAN. 11. PERMANENT SEED SHALL BE APPLIED IN ALL DISTURBED AREAS AT A RATE OF 15 LBS /ACRE. PLANTING INSTRUCTIONS PLANTING TECHNIQUES: A) ENSURE THAT ROOTS, ONCE REMOVED FROM POT, ARE STRAIGHTENED AND FACE DOWNWARD. B) CREATE PLANTING AREA FOR EACH PLANT AND EXCAVATE PIT. C) PLACE PLANTS IN PIT INSURING ROOTS ARE FACING COMPLETELY DOWNWARD. D HEEL IN SOIL AROUND PLANT AND PROCEED TO NEXT PLANTING LOCATION. E) NEWLY PLANTED PLANTS NEED TO BE FASTENED TO THE SUBSTRATE FOR THE ESTABLISHMENT OF NEW ROOTS F) ROOTS SHALL BE SPREAD IN THEIR NORMAL POSITION. ALL BROKEN OR FRAYED ROOTS SHALL BE CUT OFF CLEANLY. G) THE DIAMETER OF THE PITS FOR ALL VEGETATIVE STOCK SHALL BE AT LEAST THREE TIMES THE DIAMETER OF THE ROOT MASS. PLANT PIT WALL SHALL BE SCARIFIED PRIOR INSTALLATION. H) SET THE PLANTS UPRIGHT, IN THE CENTER OF THE PIT. THE BOTTOM OF THE ROOT MASS SHOULD BE RESTING ON UNDISTURBED SOIL. 1) PLACE THE BACKFILL AROUND THE BASE AND SIDES OF THE MASS, AND WORK EACH LAYER TO SETTLE BACKFILL AND TO ELIMINATE VOIDS AND AIR POCKETS. WHEN PIT IS APPROXIMATELY j FULL, WATER THOROUGHLY BEFORE PLACING REMAINDER OF THE BACKFILL. WATER AGAIN AFTER PLACING FINAL LAYER OF BACKFILL. J) BROKEN OR DAMAGED PARTS WILL BE CUT BACK TO UNDAMAGED TISSUE, LEAVING AS MUCH GREEN BASAL TISSUE AS POSSIBLE ABOVE THE ROOTS. IF MORE THAN FIFTY PERCENT (50 %) OF THE PLANT IS DAMAGED THEN CONTRACTOR SHALL REPLACE THE PLANT. BARE ROOT / CONTAINERIZED STOCK: A) STOCK SHALL HAVE BEEN GROWN LONG ENOUGH FOR THE ROOT SYSTEM TO HAVE DEVELOPED SUFFICIENTLY TO HOLD ITS SOIL TOGETHER ONCE REMOVED. B) CONTAINER PLANTS WILL NEED TO BE WATERED REGULARLY AND PLACED IN SHADY CONDITIONS UNTIL PLANTING OCCURS. C) BARE ROOT PLANTS ARE FOR IMMEDIATE PLANTING, OTHERWISE SEE D) BELOW. D) IF BARE ROOTS SPECIMENS ARE NOT TO BE PLANTED WITHIN FOUR (4) DAYS, TEMPORARY HOLDING OF BARE ROOT SPECIMENS ARE TO BE COVERED ENTIRELY BY A SUITABLE MEDIUM (ETC. SOIL, SAWDUST, MULCH OR THE LIKE) AND WATERED REGULARLY SO AS NOT TO DRY OUT. E) ALL SPECIES CHANGE REQUESTS MUST BE APPROVED BY ECOENGINEERING BEFORE PLANTING. PLANT LOCATIONS: A) NEW PLANTINGS SHALL BE LOCATED WHERE SHOWN ON PLAN EXCEPT WHERE CHANGES HAVE BEEN APPROVED IN PROPOSED CONSTRUCTION. B) PLANT SPACING SHALL FOLLOW REQUIREMENTS NOTED WITHIN PLANT DISTRIBUTION NOTES LISTED ON THIS SHEET. C) NECESSARY ADJUSTMENTS SHALL BE MADE ONLY AFTER APPROVAL BY THE OWNER OR THE OWNER'S REPRESENTATIVE. WATER: WATER SHALL BE POTABLE AND SHALL NOT CONTAIN ELEMENTS TOXIC TO PLANT LIFE. SEEDBED PREPARATION WITHIN LIMITS OF DISTURBANCE AREAS ONLY 1. CHISEL COMPACTED AREAS AND SPREAD TOPSOIL 3 INCHES DEEP OVER ADVERSE SOIL CONDITIONS, IF AVAILABLE. 2. RIP THE ENTIRE AREA TO 6 INCHES DEPTH. 3. REMOVE ALL LOSE ROCK, ROOTS, AND OTHER OBSTRUCTIONS LEAVING SURFACE REASONABLY SMOOTH AND UNIFORM. 4. PER ONE TIME ONLY, APPLY LIME UNIFORMLY AND MIX WITH SOIL. 5. CONTINUE TILLAGE UNTIL A WELL- PULVERIZED, FIRM, RESONABLY UNIFORM SEEDBED IS PREPARED 4 TO 6 INCHES DEEP. 6. SEED ON FRESHLY PREPARED SEEDBED AND COVER. 7. MULCH IMMEDIATLEY AFTER SEEDING AND ANCHOR MULCH. 8. INSPECT ALL SEEDED AREAS AND MAKE NECESSARY REPAIRS OR RESEEDINGS WITHIN THE PLANTING SEASON, IF POSSIBLE. 9. CONSULT INSPECTOR ON MAINTENANCE TREATMENT AFTER PERMANENT COVER IS ESTABLISHED. INVASIVE SPECIES CONTROL 1. PRIOR TO CONSTRUCTION, THE CONTRACTOR SHALL COORDINATE THE AREAS WHERE INVASIVES ARE TO BE REMOVED / TREATED WITH HERBICIDE WITH THE PROPERTY OWNER, EASEMENT OWNER, AND THE DESIGNER. 2. REMOVE CHINESE PRIVET (LIGUSTRUM SINESE), RUSSIAN OLIVE (ELAEAGNUS ANGUSTIFOLIA), ENGLISH IVY (HEDRA HELIX), AND MULTIFLORA ROSE (ROSA MULTIFLORA) FROM THE DESIGNATED WOODED AREAS. 3. THE TRUNKS, BRANCHES, AND VINES OF THESE SPECIES WILL BE BAGGED & REMOVED FROM THE SITE WITH MINIMAL DISTURBANCE TO THE SOIL SURFACE. 4. LIQUID HERBICIDE CONTAINING GLYPHOSATE WILL BE APPLIED TO ALL AREAS WHERE THE CHINESE PRIVET AND MULTIFLORA ROSE HAVE BEEN REMOVED. PLEASE NOTE THE USE OF HERBICIDES WILL REQUIRE THE APPROVAL OF THE PROPERTY OWNER, EASEMENT OWNER, AND THE DESIGNER. ONLY EPA APPROVED AQUATIC FORMULATIONS SHALL BE USED, WITH THE FOLLOWING CHEMICALS BANNED FROM USE: • NON- AQUATIC HERBICIDES • COPPER SULFATE INSERT BAR AT ANGLE SHOWN AND PUSH FORWARD TO UPRIGHT POSITION. PUSH BAR FORWARD FROM PLANTER FIRMING SOIL AT TOP OF ROOTS. REMOVE BAR AND PLACE SEEDLING AT CORRECT DEPTH. FILL IN LAST HOLE BY STAMPING WITH HEEL. DON'T EXPOSE ROOTS TO AIR DURING FREEZE OR PLANT IN FROZEN GROUND. INSERT BAR TWO INCHES TOWARD PLANTER FROM SEEDLING. FIRM SOIL AROUND SEEDLING WITH FEET. PLANT SEEDLINGS UPRIGHT - DO NOT BEND ROOTS SO NOT AT AN ANGLE. THAT THEY ANGLE UPWARDS OUT OF THE GROUND. DIBBLE DETAIL NOT TO SCALE PULL BAR TOWARD PLANTER FIRMING SOIL AT BOTTOM OF ROOTS. TEST PLANTING BY PULLING LIGHTLY ON SEEDLING. ALWAYS PLANT IN SOIL - NEVER LOOSE LEAVES OR DEBRIS. PACK SOIL TIGHTLY. PRELIMINARY DRAWING - NOT RELEASED FOR CONSTRUCTION • W w Z ° U W E � o U z z v, W a Lm M U 00 � xz� ■� 0 a q W A c; A H P2 3, O o W E'' Z o z p� � .w dumm■ wo > a Mw� m � m ■ W i w�� W d W o C3 z W rn O y ll'i a E4 zA E-+ d a z I-+ a a W d E-4 " �E G� W x ��z Z m W �x� E�� Q � A L) -4 z I: O a z O C`3 O U ° z Z z O � U a �D Mm Qa U PROJECT N0. 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SCALE: 1" = 30' RESEARCH TRIANGLE PARK ■ CHARLOTTE 2905 Meridian Parkway, Durham NC 27713 800 -733 -5646 ■ wwwjohnrmeadams.com ■ License No.: C -0293 1 .. VERT. SCALE: » > 1 = 3 REVISIONS DATE DATE: 10 -26 -12 °f 15.8' 0 Md 2.5' 1 4.1' 1 2.5' TYPICAL RIFFLE SCALE: 1 " = 5' 20.0' 11.6' ih 5.0 TYPICAL POOL SCALE: 1 " =5' STREAM RESTORATION LEGEND (TYP. ALL SHEETS) 250 5' CONTOUR � � ( ROCK CLUSTERS IN RIFFLE ©` ROCK AND ROLL RIFFLE 252 1' CONTOUR - - - - -- 250------ EXISTING 5' CONTOUR CLAY PLUG - - - - -- EXISTING 1' CONTOUR IF —IV —IF m m m STAGING AND STOCKPILE AREAS SILT FENCE OUTLET SILT FENCE LIMITS OF DISTURBANCE DIVERSION DITCH CONSTRUCTION ENTRANCE WOOD TOE LIVE STAKES /WHIPS OR BRUSH CUTTINGS LOG VANE HARDWOOD TREE 401% LOG CROSS-VANE PINE TREE /:. \ ... — ' \ TEMPORARY ACCESS LOCATION SILT FENCE WITH SILT FENCE OUTLET AT ALL 6 \ >.. 1 # ■ . / / GRAPHIC SCALE 30 0 15 30 60 1 inch = 30 ft. SEE SHEET EC -1 FOR CONSTRUCTION SEQUENCE AND EROSION CONTROL NOTES. FINAL DRAWING - NOT RELEASED FOR CONSTRUCTION PROJECT NO. SHEET NO. EcoEngineering �"M 6 OWNER: DKU -08010 5 ` DKU08010 -P1 P_ 4 DUKE UNIVERSITY DESIGNED BY: ANG PLAN & PROFILE A division of The John R. McAdams Company, Inc. U UN RS 3 FACILITIES MANAGEMENT DEPARTMENT DRAWN BY: ANG /JES /KAS AWADAMS 2 114 SOUTH BUCHANAN BOULEVARD ENGINEERS ■ PLANNERS ■ SURVEYORS ■ ENVIRONMENTAL HORIZ. SCALE: 1" = 30' NORTH, STA. 24+50 THRU STA. 20 +28 STREAM MITIGATION DURHAM, NORTH CAROLINA RESEARCH TRIANGLE PARK ■ CHARLOTTE VERT. SCALE: » > PRINT DATE: 1 2905 Meridian Parkway, Durham NC 27713 1 = 3 DURHAM COUNTY, NORTH CAROLINA 600- 733 -5646 ■ www.johnrmcadams.com. ■ License No.: C -0293 DATE: REVISIONS DATE 10 -26 -12 NORTH 360 360 355 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 355 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .................................... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . .............................................................. . . . . . . . . . . . . . . . . . . . . . . . . . EXISTING GRADE: \ r\ b. �_ REAM BED \ o, JOB . ` I JO <: Lij II a- qt \ O + N \ O a N QN Z ai N p a350 N ....., 350 'W 2 WJ W MME) +� +� I ' JOp ��... 1 / ` 2fA GN II N II NM Ofd M O� I �Ciw FQ FQN� NW I N II QN NM II �..11<1� 1N O NM •� 1 U Oi Inn tf M CNI I tn W O W 1 II 0II <� � +� M +� + 1pn i Jfd� OM +� �M ` vl / I iLJ U'W WNM\ l II ^� �M O +t N II n Z �M M +�N Iry \ I �= LU w c9�nW Za�J �W II N II Qa QF NW J O '� 0) (1! + N OCW Wa� ` 345 ZN =aJ II �� JNn WPM II II NLO fOn M ` 1 I II WON �� II W 1 W 345 :,� . M M ::::::::. ro d �� N ........... ... ........... ... : :.::::.. 1..:::: W ....... ......... O� O I. II – �V)W F Z. II W !+) N II d+ �: + MM O +� N Oi np / • va Za N II �N IIM� p..... ? II L�7a 2 W WF W Z .. N II �M II M � JN 0=CWa Z l:if WN + �M OC�W g 0_'(/IW 6 �Q I` WNM JON + N� 't �N �„ + o O aN in dN _ �� N Q �W aNM Z JN N�: 11 Of O I �W IWiQ . �f~!1W QaN17 Q +�� W F eq 340 ......... ......... ........ ......... ........... ......... ........ ... ..... ......:.......... ........ I II a N jj J OOi W N jj 340 �rnw D – a ^M N II j O w ^�...... 02 W JMM O +� M �fAW II 00 QN — O +� IL p rill F J 335 335 :f0 O tm :N W! O N O N n 4 'N slo F/C' V + °� + + a � a M #Ml Mf 317 -Ml 31 i17 :31 3 n 1 n 3 1 .......... ............................... 24 +50 .......... ............................... .......... ............................... 24 +00 .......... ............................... .......... ............................... 23 +50 .......... ............................... .......... ............................... 23 +00 .......................................... ............................... .......... ............................... .......... ............................... 22 +50 22 +00 .......... ............................... .......... ............................... .......... 21+50 ............................... .......... ............................... 21+00 .......... ............................... .......... ............................... 20 +50 20 +00 GRAPHIC SCALE 30 0 15 30 60 1 inch = 30 ft. SEE SHEET EC -1 FOR CONSTRUCTION SEQUENCE AND EROSION CONTROL NOTES. FINAL DRAWING - NOT RELEASED FOR CONSTRUCTION PROJECT NO. SHEET NO. EcoEngineering �"M 6 OWNER: DKU -08010 5 ` DKU08010 -P1 P_ 4 DUKE UNIVERSITY DESIGNED BY: ANG PLAN & PROFILE A division of The John R. McAdams Company, Inc. U UN RS 3 FACILITIES MANAGEMENT DEPARTMENT DRAWN BY: ANG /JES /KAS AWADAMS 2 114 SOUTH BUCHANAN BOULEVARD ENGINEERS ■ PLANNERS ■ SURVEYORS ■ ENVIRONMENTAL HORIZ. SCALE: 1" = 30' NORTH, STA. 24+50 THRU STA. 20 +28 STREAM MITIGATION DURHAM, NORTH CAROLINA RESEARCH TRIANGLE PARK ■ CHARLOTTE VERT. SCALE: » > PRINT DATE: 1 2905 Meridian Parkway, Durham NC 27713 1 = 3 DURHAM COUNTY, NORTH CAROLINA 600- 733 -5646 ■ www.johnrmcadams.com. ■ License No.: C -0293 DATE: REVISIONS DATE 10 -26 -12 g OWNER: DUKE UNIVERSITY FACILITIES MANAGEMENT DEPARTMENT 114 SOUTH BUCHANAN BOULEVARD DURHAM, NORTH CAROLINA EcoEngineering A division of The John R. McAdams Company, Inc. PROJECT NO. DKU -08010 PLAN & PROFILE CENTRAL, STA. 29 +37 THRU STA. 19 +97 DU UN RS STREAM MITIGATION DURHAM COUNTY, NORTH CAROLINA SHEET N0. - HIMCADAMS PRINT DATE: 5 FILENAME: DKU08010 -P3 4 DESIGNED BY: ANG 3 DRAWN BY: ANG /JES /KAS ENGINEERS ■ PLANNERS ■ SURVEYORS ■ ENVIRONMENTAL z CENTRAL HORIZ. SCALE: 1" = 30' RESEARCH TRIANGLE PARK ■ CHARLOTTE 2905 Meridian Parkway, Durham NC 27713 800 -733 -5646 ■ wwwjohnrmeadams.com ■ License No.: C -0293 1 .. VERT. SCALE: �/ / 1 = 3 REVISIONS DATE DATE: 10 -26 -12 350 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 350 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1. 0 �'? o �rn + � - - - � 11 11 -rnN Q H J - �\ 345 n W I 0 / 1. 345 00 � \ .: . rQJ ..x \ : G : GRADE _ t N p 1 M . . J . \ N II M Q J r5 . N : N C I j \ ..i . / p II I , Go- c i vi w W O + 0 II - (0 0 O f 1n Q \ I \ - . � � ' \ 1. O N II Q = 3 + rl to J p ( . - - - . = \ D .. .. W J ' F d+ (0 II N. \O \ 1. 1. 1. 1. 1. � Q � 11 + M \ 1. EXISTING / a QF S TR EAM BED: - 340 I ............. / I Q I Q � J ^ p +M + M 4 * W n ti o I O . N ... i \ 11 340 / ( Y N p . .. I I N o w 1n + � D h N . 0) . N I ......_.. t0 \ : � �: . 3. I II QQ = 11 ! = -i 11 ( � � . :n 1 #re) N : + \ 4. :: I y AO O 0 M N II ; , a 1 Q Q' - - N � I I O O 0 ' � t0 : I do M 1 I + M %.j a 11 C � Z II : . � O n M O � M NA I M O W . L a Q J J 0 n 0 I - � Q J O 1 II + C 1. I . :I 2M O M 1. I Q II ' Q U Q � II J IIN II 1. +i ° M * + M a' QU 1 QQ ' ' r IJN O J 'o p: �(p 1. N ' ` 1 to co N 1. O aW jQ 11 N � 0 . :: � W M }N I Q Q� JI� ln � II II M a0 �t0 �� + (off N1n �o p p a II QQ � ? II II �{ O 0 M + N \ O~ h II 1. 335 . ......... ... . ......... D . . a + .... C Q ...... ... .. II . ..............G. � :�. .:::... M M ..: J � M..N . ........ ........................... O s . .. N � F* .. :. ....... 0 Imo . :::::::: ....... .. �a.}...... .� .................. ............................... . ........ .... ..... ......... :::::::. : :::: ::: ::. ..... .. ....... :::::::. . ...... ...... : o :. � : " "I':: ....: STREAM RESTORATION LEGEND (TYP. ALL SHEETS) _ 1 /� SILT FENCE WITH S,LT Vii% / /�/ / \ / FEN OUTLET AT ALL 250 SfLl__FE 0€ _ ' i // / / LOW POINTS (TYP.) w LD 5' CONTOUR // 00 ROCK CLUSTERS IN RIFFLE �UTLET�TYP' 252 1' CONTOUR 0 Q' ' p ROCK AND ROLL RIFFLE j ' / / — — A \ \ \\ \ \ / / / BOCI�AND�OLL� — �s��s�_es�A� - - - - -- 250 - - - - -- EXISTING 5' CONTOUR CLAY PLUG -- % \ \ \\ — _ — — // / / iii / / / RIFFLE-(TYYPi % J fir/ \ ... ., -_ —� \ — / 9 .. EXISTING 1 CONTOUR — — _ — i — \ _ / i/ % �/ WOOD TOE &P.) ROCK CLUSTERS CONSTRUCTION ENTRANCE � � — —__ -_ ��� � _ �1 \ \ � — — � � — � � � /� / / �i i _ A \ VA /� E (TYP.) STAGING AND STOCKPILE AREAS `.. WOOD TOE F20LL ..... A \ r SILT FENCE OUTLET LIVE STAKES/WHIPS OR BRUSH CUTTINGS \? illllllli / - - -- - - -� 9N/ / / /// ��% ��� ��_ -- /�IFLE (TYP) i sF —sF —sF SILT FENCE LOG VANEy // / _ _ _ _ _ _ j/ // / //i / // TA S// / �s HARDWOOD TREE �KkiI�S- 8R'TYP max, GG // ��A V� m �— —�� \ LOG //ANE TYP: / _CUTTIM6S� / / . // LIMITS OF DISTURBANCE LOG CROSS -VANE / �Q� TH f, - -- PINE TREE _ DIVERSION DITCH 1 GIVE SbAKES /; / / IIIr 111 � II�III I s it ili � I;! I. ;I 4, I# FV�W!Ao / ) 1 V — / tom I _ i /: :; :.... Lr 4/ llr / ill r6 OWNER: DUKE UNIVERSITY FACILITIES MANAGEMENT DEPARTMENT 114 SOUTH BUCHANAN BOULEVARD DURHAM, NORTH CAROLINA gineering A division of The John R. McAdams Company, Inc. PROJECT NO. DKU -08010 PLAN & PROFILE SOUTH, STA. 18 +80 THRU STA. 9 +61 DU UN RS STREAM MITIGATION DURHAM COUNTY, NORTH CAROLINA SHEET N0. d P_ 4 HiMcADAMS PRINT DATE: FILENAME: DKU08010 -P1 4 DESIGNED BY: ANG 3 DRAWN BY: ANG /JES /KAS ENGINEERS ■ PLANNERS ■ SURVEYORS ■ ENVIRONMENTAL 2 HORIZ. SCALE: 1" = 30' RESEARCH TRIANGLE PARK ■ CHARLOTTE 2905 Meridian Parkway, Durham NC 27713 800 -733 -5646 ■ wwwjohnrmeadams.com ■ License No.: C -0293 1 VERT. SCALE: » > 1 = 3 REVISIONS DATE DATE: 10 -26 -12 REACH EXISTING LENGTH (LF) RESTORED LENGTH (LF) APPROACH MITIGATION RATIO CREDITS (SMUs) 1 243 243 E2/4 1:4 61 2 622 562 R 1:1 562 3 550 540 R 1:1 540 4 721 609 R 1:1 609 4A 33 33 E2/4 0 0 5 339 300 R 1:1 300 6 312 258 R 1:1 258 7 373 358 E2/4 1:4 90 8 266 303 R 1:1 303 TOTAL SMUs = 2,723 LEGEND EXISTING STREAM CHANNEL RIPARIAN BUFFER — - . ' `'� PROPOSED (RESTORED /ENHANCED) STREAM CHANNEL REACH BREAK GRAPHIC SCALE 100 0 50 100 200 1 inch = 100 ft. PRELIMINARY (NARY DRAWING e NOT RELEASED FOR CONSTRUCTION 0) E • W w L zz U Z Fez o C „ � W a CQ a uz L) 0 W aQ ai tea'' dG1. � A0 O W F 0 °• o z x •�, o z Wa pqw� ;b wLN2� w d w o z Co c� z w 0 y a a H zA z d w z �-+ a �Z> a wZ x z�z dm W x �� w o a" Q � `� A a c� d z 0 a z O 00 U � a o z W a o � U O AQ V i Qa U PROJECT NO DKU -8010 FILENAME: DKU- 8010 -51 DESIGNED BY: AN G DRAWN BY: JES SCALE: 1 n =100, DATE: 10-26-2012 SHEET N0. C -1 J (S�JIS I RHI QEV -JBIk� / allor R METAL A)£E(EN- .TBB.O I bVV WT },T)L 85/ /s NV WJ 3 4N X55 - ��. L IIII "C.� ��� %i %i�� /���i, /l� ✓ ,:�, ,.r?�, : / %�y�l l��ii / /�f'( \ _ / a _.:...__ \ _ / v %� \f/ 1'i''is / /�V WTT (SW/ -JJA05 / � / I - .- I \\ \Illlllll�\\I I 1 \\ -- � \���`�� / \11 �� �A \�'� LEGEND 0 EXISTING IRON PIPE • IRON PIPE SET • CALCULATED POINT BORE HOLE �S SANITARY SEWER MANHOLE © SANITARY SEWER CLEANOUT Wv WATER VALVE ® WATER METER FIRE HYDRANT T❑ TELEPHONE PEDESTAL Q TELEPHONE MANHOLE Q ELECTRIC BOX C LIGHT POLE 0-) POWER POLE CURB INLET O STORM DRAINAGE MANHOLE ❑ YARD INLET DRIVEWAY CULVERT SD STORM DRAIN OU OVERHEAD UTILITY LINE UE UNDERGROUND ELECTRIC UT UNDERGROUND TELEPHONE W WATER LINE SS SANITARY SEWER LINE G GAS LINE — X X FENCE LINE � ► I GRAPHIC SCALE 100 0 50 100 200 1 inch = 100 ft. PRELIMINARY DRAWING e NOT RELEASED FOP, CONSTRUCTION 0) E • W w z ° U w E � o U z b-4 a O L, p W a A "• ujpt H a a9 O W E- z xl o z a� duno' ko W a �wko A P4 d W o c� z w r�r^ Vhl a a E zA z d w z �-+ a a wZ z�z d� W x w o x Q 0 -4 a L z 0 a z O O o� a F U Z O O z 0 U O U Z rrA Q vi A a U PROJECT N0. DKU -08010 FILENAME: DKU- 8010 -C2 DESIGNED BY: AN G DRAWN BY: JES SCALE: 1 » =100' DATE: 10-26-2012 SHEET N0. C -2 E��� DURHAM COUNTY, NORTH CAROLINA PROJECT NUMBER: DKU-80 10 DATE: OCTOBER 26, 2012 OWNER I ol li IkIl Ali � I kyj D) t4"j 0 V4 PRELIMINARY DRAWING - NOT RELEASED FOR CONSTRUCTION NORTH o CENTRAL 4 lr �� /// / �� _ �� - �A� \ \� \ VA\ V\o I I \I SOUTH ............ ......... .......... /7r,// �(li��lvv1 it / v A v v v vv vv��vAvvv� \vv \)� \ ?�TE PO R�AAESS \ 1 I I 1\ \ I I \ HARDWOOD TREE \ I - - - f / / / ..:- LOCATION OF STORMWATER OUTFACE ENHANCEMENT I / �k 1 � II I ............ ......... .......... /7r,// �(li��lvv1 it / v A v v v vv vv��vAvvv� \vv \)� \ ?�TE PO R�AAESS \ 1 I I 1\ \ I I \ L:ttLT FENCE \ Q �- m am SILT FENCE / (TYP.) ..1 ... \ dv Lo lD�- .... \ :.:, i / - - - J - - - - / / T 1 I I- III -I I �I I I- :.. ► . � ::/ / / � / - � /� \..t� - I Yl 070 P I I / -- /� /%_ Imo, II : � \ � - -- �_ �!/ _� � - -\ ✓/ ✓ \�I�� ,�` �� -III Hil � ,1111111 / III ,/ / l /p 'z LEGEND • SILT FENCE OUTLET SILT FENCE LIMITS OF DISTURBANCE mug= 5 CONSTRUCTION ENTRANCE 1' CONTOUR 5' CONTOUR EXISTING 5' CONTOUR EXISTING 1' CONTOUR STAGING AND STOCKPILE AREAS CONSTRUCTION ENTRANCE LIVE STAKES /WHIPS OR BRUSH CUTTINGS HARDWOOD TREE \ I - - - f / / / ..:- LOCATION OF STORMWATER OUTFACE ENHANCEMENT I / L:ttLT FENCE \ Q �- m am SILT FENCE / (TYP.) ..1 ... \ dv Lo lD�- .... \ :.:, i / - - - J - - - - / / T 1 I I- III -I I �I I I- :.. ► . � ::/ / / � / - � /� \..t� - I Yl 070 P I I / -- /� /%_ Imo, II : � \ � - -- �_ �!/ _� � - -\ ✓/ ✓ \�I�� ,�` �� -III Hil � ,1111111 / III ,/ / l /p 'z LEGEND • SILT FENCE OUTLET SILT FENCE LIMITS OF DISTURBANCE mug= 5 CONSTRUCTION ENTRANCE 1' CONTOUR 5' CONTOUR EXISTING 5' CONTOUR EXISTING 1' CONTOUR STAGING AND STOCKPILE AREAS CONSTRUCTION ENTRANCE LIVE STAKES /WHIPS OR BRUSH CUTTINGS CONSTRUCTION SEQUENCE AND EROSION & SEDIMENT CONTROL MOBII.I7 kIlON AND EROSION AND SEDDIENT CONTROL 1. ESTABLISH CONSTRUCTION ENTRANCE (SHEET D1) AND STAGING AREA. LIMIT TREE REMOVAL TO THE MINIMUM EXTENT POSSIBLE. 2. LIMITS OF DISTURBANCE SHALL BE MARKED BY SILT FENCE OR ORANGE TREE PROTECTION FENCE (SHEET D2). 3. USE THE AREA DESIGNATED ON THE PLANS FOR ALL STAGING ACTIVITIES RELATED TO THE PROJECT. 4. PARK ALL CONSTRUCTION EQUIPMENT, INCLUDING TRUCKS AND HEAVY EQUIPMENT WITHIN THE LIMITS OF DISTURBANCE. 5. CONTRACTOR TO UTILIZE TEMPORARY STREAM CROSSINGS FOR ACCESS. 6. INSTALL SILT FENCE FOR STAGING AND STOCKPILE AREAS (SHEET D1). 7. SILT FENCE WITH 6' SUPPORT SPACING OR WITH WIRE BACKING SHALL BE INSTALLED AROUND THE DOWNSLOPE PERIMETER OF ALL SOIL STOCKPILE AREAS. 8. LARGE SPECIMEN TREES THAT HAVE BEEN FLAGGED SHOULD BE AVOIDED TO THE GREATEST EXTENT POSSIBLE. 9. COMPLETE ALL PLANTING. 10. STABILIZE ALL DISTURBED AREAS. REMOVE STAGING AREA AND CONSTRUCTION ENTRANCE. 11. DEMOBILIZE ALL EQUIPMENT AND MATERIALS FROM SITE. SM PREPARATION: CLEARING. AND SOIL SUBSOIL EXCAVATION 1. ALL SHRUBS AND SMALL TREES DESIGNATED BY THE ENGINEER WILL BE SAVED FOR TRANSPLANTING. PLANTS THAT ARE TO BE TRANSPLANTED WILL BE MARKED WITH HIGHLY VISIBLE TAPE. 2. CONTRACTOR SHALL MANAGE EXCAVATED TOPSOIL SEPARATELY FROM EXCAVATED SUBSOIL. EXCAVATED TOPSOIL SHALL BE PLACED WITHIN THE DESIGNATED TEMPORARY STOCKPILE AREAS AWAY FROM THE CHANNEL TO BE FILLED (SEE PLANS). TOPSOIL SHALL BE FREE OF STONES OVER 1" IN DIAMETER, ROOTS, STICKS, RUBBISH, STIFF CLAY, AND EXTRANEOUS MATTER. 3. EXCAVATED SUBSOIL SHALL BE PLACED NEAR THE CHANNEL TO BE FILLED. ONCE THE NEW STREAM IS CONSTRUCTED, SUBSOIL SHALL BE USED TO FILL THE EXISTING CHANNEL FIRST, THEN STOCKPILED TOPSOIL SHALL BE USED FOR THE FINAL 6 INCHES OF FILL. 4. IF FILL MATERIAL IS REQUIRED, IT SHALL BE FREE OF DEBRIS AND MEET THE FOLLOWING GRADATION TESTED IN ACCORDANCE WITH ASTM D -422 SIEVE SIZE PERCENT PASSING 2 INCH 100 1 INCH 90 -100 j INCH 60 -90 NO. 40 0 -60 NO. 200 0 -35 PLASTICITY INDEX (PI) < 15 AND LIQUID LIMIT <40 PER ASTM D -4318. THE MAXIMUM AGGREGATE SIZE SHALL BE LIMITED TO INCH FILL MATERIAL MAY BE SITE - EXCAVATED SOILS WHERE T HE ABOVE REQUIREMENTS CAN BE MET. UNSUITABLE SOILS FOR BACKFILL (HIGH PLASTIC CLAYS OR ORGANIC SOILS) SHALL NOT BE USED IN THE BACKFILL OR IN THE REINFORCED SOIL MASS. VISUAL OBSERVATION SHALL BE SUFFICIENT FOR THE APPROVAL OF SITE - EXCAVATED SOILS. 6. IMPORTED TOSOIL SHALL HAVE A LOAMY TEXTURE AND HAVE SAND, SILT, AND CLAY PERCENTAGES THAT MEET THE U.S. DEPARTMENT OF AGRICUTLTURE CHARACTERISTICS OF A LOAMY SOIL. ORGANIC CONTENT SHALL NOT BE LESS THAN 1.5% BY WIEGHT. PH RANGE SHALL BE FROM 6 -7.5. IF PH IS LESS THAN 6, LIME SHALL BE ADDED. SOLUBLE SALTS SHALL NOT EXCEED 50OPPM. IMPROTED TOPSOIL SHALL BE FREE OF DEBRIS, ROOTS, PLANTS, STICKS, RUBBISH, STIFF CLAYS, AND STONES OVER 1 INCH IN DIAMETER. 1. INSTALL PUMP AROUND ALONG 200' TO 300' OF STREAM CHANNEL, OR NO MORE THAN CAN BE CONSTRUCTED IN ONE (1) WORKING DAY (DEWATERING AND PUMP AROUND DETAILS ON SHEETS D1 AND D2). 2. HARVEST MATERIAL FROM THE BOTTOM OF THE EXISTING CHANNEL TO BE PLACED IN THE BOTTOM OF THE PROPOSED CHANNEL. THIS SHALL INCLUDE THE SURFACE MATERIAL AND UP TO ONE (1) FOOT BELOW. 3. FILL EXISTING CHANNEL ON THE SAME WORKING DAY AS COMPLETING THE PROPOSED CHANNEL. IN NO EVENT SHALL THE EXISTING CHANNEL BE FILLED PRIOR TO THE COMPLETE CONSTRUCTION OF THE CORRESPONDING PROPOSED CHANNEL. 4. ANY EXCAVATED MATERIAL CONTAINING BRICK IS NOT SUTABLE MATERIAL FOR CHANNEL FILL AND MUST BE DISPOSED OF OFFSITE UNLESS OTHERWISE DIRECTED BY OWNER. 5. IN ANY SECTION WHERE THE NEW CHANNEL ALIGNMENT CROSSES THE EXISTING CHANNEL A CLAY PLUG WILL BE INSTALLED IN THE EXISTING CHANNEL AS PER DETAIL ON SHEET D2. 6. THE PROPOSED CHANNEL BANKS SHALL BE STABILIZED WITH COIR FIBER MATTING AND TEMPORARY SEEDING UPON COMPLETION OF EACH SECTION (REFER TO SHEET D1). 7. COMPLETE ALL EARTHWORK, STRUCTURE INSTALLATION, AND STABILIZATION IN THE PUMP AROUND AREA. 8. AT A MINIMUM, 20 -FOOT LENGTHS OF EXISTING CHANNEL SHOULD BE FILLED EVERY 50 -FEET OR AS DIRECTED BY THE ENGINEER. 9. COMPLETE ALL SITE WORK INCLUDING PLANTING AND REMOVE ALL SILT FENCE WITHIN PUMP AROUND AREA. HALT ANY FURTHER ACCESS IN THIS AREA BY HEAVY EQUIPMENT. 10. CONTRACTOR SHALL NOTIFY ENGINEER UPON DISCOVERY OF ANY CONSTRAINS DISCOVERED IN THE CONSTRUCTION OF THE PROPOSED CHANNEL. DIAENTEMMCE PLAN lilt GRAPHIC SCALE 50 0 25 50 100 1 inch = 50 ft. TOTAL DISTURBED AREA = 5.8 ACRES 1. ALL EROSION AND SEDIMENT CONTROL PRACTICES WILL BE CHECKED FOR STABILITY AND OPERATION FOLLOWING EVERY RUNOFF - PRODUCING RAINFALL BUT IN NO CASE LESS THAN ONCE EVERY WEEK. ANY NEEDED REPAIRS WILL BE MADE IMMEDIATELY TO MAINTAIN ALL PRACTICES AS DESIGNED. 2. SEDIMENT WILL BE REMOVED FROM BEHIND THE SEDIMENT FENCES WHEN IT BECOMES APPROXIMATELY SIX (6) INCHES DEEP AT THE FENCE. THE SEDIMENT FENCE WILL BE REPAIRED AS NECESSARY TO MAINTAIN A BARRIER. ALL SEEDED AREAS WILL BE FERTILIZED, RESEEDED AS NECESSARY, AND MULCHED ACCORDING TO SPECIFICATIONS IN THE VEGETATIVE PLAN. BECAUSE THE GOAL OF THE RESTORATION IS TO ESTABLISH A SELF MAINTAINING VEGETATED CORRIDOR, MAINTENANCE SHOULD BE MINIMAL. PRELIMINARY DRAWING - NOT RELEASED FOR CONSTRUCTION 0) E W w z ° U w E- 8 � o " z Lz L- v, W a LM d' a .� O ■ A W � A "• W p H P2 3, O o W E'' z o z a� ;� d = uo m w In C,2 Cm W d W o c� z w z O 5 a a F zA z d w z �-+ a �Z> a � wz� d x z�z CQ W x woa Q ESA a L z 0 a z O V 0 0 U a a zz 0 U Q 0 0 �D � U � w AQ V� Qa U PROJECT N0. DKU -8010 FILENAME: DKU8010 -EC,`1 DESIGNED BY: ANG DRAWN BY: AN G SCALE: 1 " =50' DATE: 10-26-2012 SHEET N0. EC -1 E��� HARDWOOD TREE PINE TREE TREE REMOVAL CONSTRUCTION SEQUENCE AND EROSION & SEDIMENT CONTROL MOBII.I7 kIlON AND EROSION AND SEDDIENT CONTROL 1. ESTABLISH CONSTRUCTION ENTRANCE (SHEET D1) AND STAGING AREA. LIMIT TREE REMOVAL TO THE MINIMUM EXTENT POSSIBLE. 2. LIMITS OF DISTURBANCE SHALL BE MARKED BY SILT FENCE OR ORANGE TREE PROTECTION FENCE (SHEET D2). 3. USE THE AREA DESIGNATED ON THE PLANS FOR ALL STAGING ACTIVITIES RELATED TO THE PROJECT. 4. PARK ALL CONSTRUCTION EQUIPMENT, INCLUDING TRUCKS AND HEAVY EQUIPMENT WITHIN THE LIMITS OF DISTURBANCE. 5. CONTRACTOR TO UTILIZE TEMPORARY STREAM CROSSINGS FOR ACCESS. 6. INSTALL SILT FENCE FOR STAGING AND STOCKPILE AREAS (SHEET D1). 7. SILT FENCE WITH 6' SUPPORT SPACING OR WITH WIRE BACKING SHALL BE INSTALLED AROUND THE DOWNSLOPE PERIMETER OF ALL SOIL STOCKPILE AREAS. 8. LARGE SPECIMEN TREES THAT HAVE BEEN FLAGGED SHOULD BE AVOIDED TO THE GREATEST EXTENT POSSIBLE. 9. COMPLETE ALL PLANTING. 10. STABILIZE ALL DISTURBED AREAS. REMOVE STAGING AREA AND CONSTRUCTION ENTRANCE. 11. DEMOBILIZE ALL EQUIPMENT AND MATERIALS FROM SITE. SM PREPARATION: CLEARING. AND SOIL SUBSOIL EXCAVATION 1. ALL SHRUBS AND SMALL TREES DESIGNATED BY THE ENGINEER WILL BE SAVED FOR TRANSPLANTING. PLANTS THAT ARE TO BE TRANSPLANTED WILL BE MARKED WITH HIGHLY VISIBLE TAPE. 2. CONTRACTOR SHALL MANAGE EXCAVATED TOPSOIL SEPARATELY FROM EXCAVATED SUBSOIL. EXCAVATED TOPSOIL SHALL BE PLACED WITHIN THE DESIGNATED TEMPORARY STOCKPILE AREAS AWAY FROM THE CHANNEL TO BE FILLED (SEE PLANS). TOPSOIL SHALL BE FREE OF STONES OVER 1" IN DIAMETER, ROOTS, STICKS, RUBBISH, STIFF CLAY, AND EXTRANEOUS MATTER. 3. EXCAVATED SUBSOIL SHALL BE PLACED NEAR THE CHANNEL TO BE FILLED. ONCE THE NEW STREAM IS CONSTRUCTED, SUBSOIL SHALL BE USED TO FILL THE EXISTING CHANNEL FIRST, THEN STOCKPILED TOPSOIL SHALL BE USED FOR THE FINAL 6 INCHES OF FILL. 4. IF FILL MATERIAL IS REQUIRED, IT SHALL BE FREE OF DEBRIS AND MEET THE FOLLOWING GRADATION TESTED IN ACCORDANCE WITH ASTM D -422 SIEVE SIZE PERCENT PASSING 2 INCH 100 1 INCH 90 -100 j INCH 60 -90 NO. 40 0 -60 NO. 200 0 -35 PLASTICITY INDEX (PI) < 15 AND LIQUID LIMIT <40 PER ASTM D -4318. THE MAXIMUM AGGREGATE SIZE SHALL BE LIMITED TO INCH FILL MATERIAL MAY BE SITE - EXCAVATED SOILS WHERE T HE ABOVE REQUIREMENTS CAN BE MET. UNSUITABLE SOILS FOR BACKFILL (HIGH PLASTIC CLAYS OR ORGANIC SOILS) SHALL NOT BE USED IN THE BACKFILL OR IN THE REINFORCED SOIL MASS. VISUAL OBSERVATION SHALL BE SUFFICIENT FOR THE APPROVAL OF SITE - EXCAVATED SOILS. 6. IMPORTED TOSOIL SHALL HAVE A LOAMY TEXTURE AND HAVE SAND, SILT, AND CLAY PERCENTAGES THAT MEET THE U.S. DEPARTMENT OF AGRICUTLTURE CHARACTERISTICS OF A LOAMY SOIL. ORGANIC CONTENT SHALL NOT BE LESS THAN 1.5% BY WIEGHT. PH RANGE SHALL BE FROM 6 -7.5. IF PH IS LESS THAN 6, LIME SHALL BE ADDED. SOLUBLE SALTS SHALL NOT EXCEED 50OPPM. IMPROTED TOPSOIL SHALL BE FREE OF DEBRIS, ROOTS, PLANTS, STICKS, RUBBISH, STIFF CLAYS, AND STONES OVER 1 INCH IN DIAMETER. 1. INSTALL PUMP AROUND ALONG 200' TO 300' OF STREAM CHANNEL, OR NO MORE THAN CAN BE CONSTRUCTED IN ONE (1) WORKING DAY (DEWATERING AND PUMP AROUND DETAILS ON SHEETS D1 AND D2). 2. HARVEST MATERIAL FROM THE BOTTOM OF THE EXISTING CHANNEL TO BE PLACED IN THE BOTTOM OF THE PROPOSED CHANNEL. THIS SHALL INCLUDE THE SURFACE MATERIAL AND UP TO ONE (1) FOOT BELOW. 3. FILL EXISTING CHANNEL ON THE SAME WORKING DAY AS COMPLETING THE PROPOSED CHANNEL. IN NO EVENT SHALL THE EXISTING CHANNEL BE FILLED PRIOR TO THE COMPLETE CONSTRUCTION OF THE CORRESPONDING PROPOSED CHANNEL. 4. ANY EXCAVATED MATERIAL CONTAINING BRICK IS NOT SUTABLE MATERIAL FOR CHANNEL FILL AND MUST BE DISPOSED OF OFFSITE UNLESS OTHERWISE DIRECTED BY OWNER. 5. IN ANY SECTION WHERE THE NEW CHANNEL ALIGNMENT CROSSES THE EXISTING CHANNEL A CLAY PLUG WILL BE INSTALLED IN THE EXISTING CHANNEL AS PER DETAIL ON SHEET D2. 6. THE PROPOSED CHANNEL BANKS SHALL BE STABILIZED WITH COIR FIBER MATTING AND TEMPORARY SEEDING UPON COMPLETION OF EACH SECTION (REFER TO SHEET D1). 7. COMPLETE ALL EARTHWORK, STRUCTURE INSTALLATION, AND STABILIZATION IN THE PUMP AROUND AREA. 8. AT A MINIMUM, 20 -FOOT LENGTHS OF EXISTING CHANNEL SHOULD BE FILLED EVERY 50 -FEET OR AS DIRECTED BY THE ENGINEER. 9. COMPLETE ALL SITE WORK INCLUDING PLANTING AND REMOVE ALL SILT FENCE WITHIN PUMP AROUND AREA. HALT ANY FURTHER ACCESS IN THIS AREA BY HEAVY EQUIPMENT. 10. CONTRACTOR SHALL NOTIFY ENGINEER UPON DISCOVERY OF ANY CONSTRAINS DISCOVERED IN THE CONSTRUCTION OF THE PROPOSED CHANNEL. DIAENTEMMCE PLAN lilt GRAPHIC SCALE 50 0 25 50 100 1 inch = 50 ft. TOTAL DISTURBED AREA = 5.8 ACRES 1. ALL EROSION AND SEDIMENT CONTROL PRACTICES WILL BE CHECKED FOR STABILITY AND OPERATION FOLLOWING EVERY RUNOFF - PRODUCING RAINFALL BUT IN NO CASE LESS THAN ONCE EVERY WEEK. ANY NEEDED REPAIRS WILL BE MADE IMMEDIATELY TO MAINTAIN ALL PRACTICES AS DESIGNED. 2. SEDIMENT WILL BE REMOVED FROM BEHIND THE SEDIMENT FENCES WHEN IT BECOMES APPROXIMATELY SIX (6) INCHES DEEP AT THE FENCE. THE SEDIMENT FENCE WILL BE REPAIRED AS NECESSARY TO MAINTAIN A BARRIER. ALL SEEDED AREAS WILL BE FERTILIZED, RESEEDED AS NECESSARY, AND MULCHED ACCORDING TO SPECIFICATIONS IN THE VEGETATIVE PLAN. BECAUSE THE GOAL OF THE RESTORATION IS TO ESTABLISH A SELF MAINTAINING VEGETATED CORRIDOR, MAINTENANCE SHOULD BE MINIMAL. PRELIMINARY DRAWING - NOT RELEASED FOR CONSTRUCTION 0) E W w z ° U w E- 8 � o " z Lz L- v, W a LM d' a .� O ■ A W � A "• W p H P2 3, O o W E'' z o z a� ;� d = uo m w In C,2 Cm W d W o c� z w z O 5 a a F zA z d w z �-+ a �Z> a � wz� d x z�z CQ W x woa Q ESA a L z 0 a z O V 0 0 U a a zz 0 U Q 0 0 �D � U � w AQ V� Qa U PROJECT N0. DKU -8010 FILENAME: DKU8010 -EC,`1 DESIGNED BY: ANG DRAWN BY: AN G SCALE: 1 " =50' DATE: 10-26-2012 SHEET N0. EC -1 E���