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HomeMy WebLinkAbout20061780 Ver 2_Mitigation Plans_20081029N - n?6 FLOOGIE STREAM AND WETLAND MITIGATION PROJECT BERTIE COUNTY, NORTH CAROLINA DENR-EEP CONTRACT No. D06011 Prepared for: Environmental Banc & Exchange, LLC 909 Capability Drive, Suite 3100 Raleigh, NC 27606 Prepared by: WK Dickson & Company, Inc. 720 Corporate Center Drive Raleigh, North Carolina 27607 (919) 782-0495 September 2008 'RECEIVED NC ECOSYSTEM ENHANCEMENT PROGRAM MITIGATION PLAN nct32 6Fc 1"Z • FLOOGIE STREAM AND WETLAND MITIGATION PROJECT MITIGATION PLAN TABLE OF CONTENTS Project Description ..................................................................................................................................... 1 • Project Site ................................................................................................................................................. l • Mitigation Summary .................................................................................................................................. 5 • Wetland Construction ................................................................................................................................ 5 • Wetland Planting ........................................................................................................................................ 6 • Stream Construction ................................................................................................................................... 6 • Riparian Planting ........................................................................................................................................ 7 • Comments and Observations ...................................................................................................................... 7 • Monitoring Set-Up ..................................................................................................................................... 9 • Wetland Hydrology .................................................................................................................................... 9 • Wetland Vegetation .................................................................................................................................... 9 • Stream Stability .......................................................................................................................................... 9 • Headwater streams ................................................................................................................................... 10 Riparian Vegetation ................................................................................................................................. 10 Benthic Macroinvertebrates ..................................................................................................................... 11 • • List of Figures Figure 1. Project Vicinity Map ......................................................................................2 w Figure 2. USGS Quad Map ..........................................................................................3 • Figure 3. LIDAR Image Map .........................................................................................4 List of Tables Table 1. Floogie Mitigation Summary ..............................................................................5 Table 2. Baseline wetland and riparian planted trees .............................................................6 Table 3. Wetland planted trees per plot and corresponding stocking levels ...................................9 Table 4. Riparian planted trees per plot and corresponding stocking levels .................................11 Appendix A: As-Built Vegetation Plot Photos Appendix B: As-Built Monitoring Cross Sections Appendix C: Photos of Headwater Stream Restoration Reaches 1A and 1B Appendix D: DWQ Stream Forms Appendix E: As-Built Plans • WK Dickson & Co., Inc. i • FLOOGIE STREAM AND WETLAND MITIGATION PROJECT MITIGATION PLAN • FLOOGIE STREAM AND WETLAND MITIGATION PLAN • PROJECT DESCRIPTION The Floogie Stream and Wetland Mitigation Project is in Bertie County, North Carolina. The project is • located in the Lower Roanoke River Basin 03010107 hydrologic unit. Stream mitigation was provided through restoration on Flat Swamp Creek, headwater stream restoration, and riverine wetland mitigation was provided through restoration. The site was identified and developed by EBX to support the NC EEP full delivery mitigation process. The objectives of the Project are: 5 r,?s • provide-l-6-,4)19 stream mitigation units (SMU); and, • provide 25 riverine wetland mitigation units (WMU). This Mitigation Plan (Plan) documents the stream and wetland mitigation activities at the Floogie site. The Plan includes narrative project description, plan views, elevations, cross sections, and photographs of completed mitigation activities. The Plan also includes a list of the species planted and their associated densities, and the five-year monitoring protocol. The restoration project will provide multiple ecological and water quality benefits within the Roanoke River Basin. Anticipated benefits include: • • nutrient removal; • • sediment reduction; • water storage; • improved groundwater recharge; • • improved in-stream and riparian habitat; and, • restored wetland habitat. • PROJECT SITE The Floogie site is located 9 miles northeast of Windsor (Figure 1). The property is 104 acres located immediately southwest of SR 1348 (Browns School Road) and is accessed via a farm road that runs adjacent to the channel (Flat Swamp Creek). Flat Swamp Creek has a drainage area of 1,168 acres (1.83 mil) at the upstream end of the restoration project and 2,150 acres (3.36 mil) at the downstream end (Figure 2). The wetland restoration area has a drainage area of 1,456 acres (2.28 mi2). The floodplain is mapped as Wehadkee loam, and the adjacent side slope drainages are mapped as Rains sandy loam. Wehadkee is an alluvial soil indicative of • floodplains and valley features. Rains soils are nearly level and can occupy shallow depressions. As detailed in the Floogie Restoration Plan, soil borings confirmed hydric soils on the floodplain and adjacent side slope drainageways. The dominant historic land use was agricultural production of crops including cotton, soybeans, corn, and timber, although some areas were woodlands. Natural drainage patterns throughout the watershed had been historically altered to drain wetlands and promote agricultural production. Numerous agricultural ditches had been constructed on the project site, and streams had been channelized to route water off the site, draining areas that were once wetland. Decades of agricultural production and human manipulation altered the landforms and disturbed many of the indicators of headwater valleys adjacent to Flat Swamp Creek. Prior to restoration activities, the two headwater stream systems were conveyed down the valley and across the floodplain in agricultural drainage ditches. As detailed in the Floogie Restoration Plan, soil borings confirmed hydric soils on the floodplain and adjacent side slope drainageways. Both USGS topographic mapping and LiDAR imagery (Figure 3) clearly indicate valley features extending from the Flat Swamp Creek floodplain into the adjacent side slopes. At the conservation easement boundary WK Dickson & Co., Inc. 1 • • • err) t-3 Cen' A Whites Cros ds ` - / K.3 A 11! , f?t:laa ; i? 0 I 0 U) 1 ! 't. .0 l IUIII t ? 1 1, • , etr I \ .. ll • I l7.5 ra ??? ' Riparian Wetland r - ` - cam ?s Restoration Area I) ? ? ? 58. ? ? ??'•. i. I C.en?cP N .I I ? -A a 0 ! c, ? s 1 ` 1 ?9 r6 3 tream Restoration t Stream Restoration q Existing Wetland Boundary ?_ - Y ?7 Opp `vote: Watershed'Rounda was delineated using LID data and not USGS'topo LEGEND Figure 2. NCDOT R d oa s USGS Quadrangle Map Stream O Project Area Floogie Site - Potential Riverine Wetland Restoration 0 1,000 2,000 4,000 O Watershed Boundary Feet a• ¦ © Figure 3 r o 100 200 400 LIDAR Image Feet Floogie Site 1 inch equals 200 feet LEGEND NCDOT Roads O Existing Wetland Restored Stream Boundaries Restored Wetland Head-Water Boundaries Restoration Culvert Outlets O Easement Boundary • • • FLOOGIE STREAM AND WETLAND MITIGATION PROJECT MITIGATION PLAN (upstream limit) the Reach I A valley is approximately 250 feet wide. At the conservation easement boundary (upstream limit) the Reach IB valley is approximately 100 feet wide. DWQ Stream Identification Forms (0.1) were completed for the pre-construction conditions based on records of initial condition investigations, photographs, and personal knowledge of the site (Appendix D). Reach IA scored 22.5 points. Reach I B scored 20.0 points. The restoration areas are protected by a conservation easement. MITIGATION SUMMARY The objective of this project is to produce a minimum of 11,149 stream mitigation units (SMU), 25 riverine wetland mitigation units (WMU), and maximize the improvement of riparian and aquatic habitats and water quality through ecological restoration practices. The as-built survey documented 10,471 linear feet of stream restoration (Table 1). An additional 678 SMU were produced from two headwater stream restorations pursuant to the "Information Regarding Stream Restoration on the Outer Coastal Plain of North Carolina" (USACE 2005). Overbank stream flows will provide a portion of the hydrology for the wetlands. The wetland and stream restoration project will provide multiple ecological and water quality benefits within the Roanoke River Basin. Benefits include nutrient removal, sediment reduction, water storage, improved groundwater recharge, improved in-stream and riparian habitat, and restored wetland habitat. Table 1. Floo 'e Mitigation Summa MITIGATION PRACTICE SIZE RATIO MITIGATION UNITS Wetland Riverine wetland restoration 25.19 ac l:l 25.19 Total: 25.19 WMU's Stream Stream Restoration (Flat Swam Creek) 10,471 It 1:1 10,471 Headwater Stream Restoration Reach 1 A 322 If 1:1 322 Headwater Stream Restoration Reach I B 356 If 1:1 356 Total: 1 1,149 SMU' s WETLAND CONSTRUCTION Wetland construction began in October 2007 and was completed in February 2008. Wetland restoration activities included plugging existing ditches, opening ditches outside the restoration area to promote infiltration, restoring microtopography, planting wetland species, and relocating an existing farm road outside of the easement. This roadbed interrupted surface flow to and from the channel. Grading included microtopograhy on the floodplain to create hydrologic retention, and encourage species diversification. Combined with the stream restoration, these actions will result in a sufficiently high water table and flood frequency to support hydrophytic vegetation and wetland hydrology, resulting in restored riverine wetlands. The primary restoration activities included constructing a stream channel that floods the adjacent wetlands more frequently, and construction of ditch plugs and backfilling ditches throughout the prior converted farmland area and clearcut/pine plantation area. A typical ditch plug was 15 feet wide and extended above the ditch bank elevation approximately six inches. Plugs were constructed of compacted fill (clay or sandy clay) in 12 inch lifts with the upper 18 inches minimally compacted to facilitate plant growth. Plugs were spaced such that successive plugs are no more than 12 inches in elevation below the adjacent plug. Where plugs may impact adjacent ditches (outside of the proposed conservation easement) the top of plug elevation was equal to the existing ditch invert outside of the easement to prevent hydrologic trespass. Several ditches extend in a north-south direction outside of the proposed restoration area adjacent to existing agricultural land. A series of eight culverts were installed below the relocated farm path to convey flow from these ditches into the restoration area. Outlets were WK Dickson & Co., Inc. FLOOGIE STREAM AND WETLAND MITIGATION PROJECT MITIGATION PLAN constructed at these culverts to allow diffuse surface flow into the restoration area. The farm road adjacent to the existing stream was relocated outside of the proposed easement. Locations of pertinent wetland restoration structures and elevations are given in the As-Built drawings in Appendix C. WETLAND PLANTING All wetland vegetation was planted at the site during the March 10-16, 2008 time period. The planted area consists of two zones. Zone 1 is a wetter zone where inundated and saturated conditions will be typical. In Zone 2, saturation will be common, but drier periods will also likely occur. Plant materials used were bare-root seedlings and live stakes. Species selection was based on reference wetland vegetation and literature, and will produce a diverse habitat that includes mast producing species and fast-growing early successional species. The initial stocking density of plantings across the wetland sites was approximately 691 stems per acre (9 ft. X 7 ft. spacing). A list of all species planted and their percent composition is included in Table 2. All disturbed areas were seeded with appropriate seasonal temporary and permanent seed mixes to provide erosion control. Table 2. Baseline wetland and riparian planted trees Common Name Scientific Name Plantteed Trees/Acre Composition River birch Betula ni ra 2,000 31 4 Green Ash Fraxinus ennsWmnica 7,100 110 16 Tulip poplar Giriodendrori tuli i era 2,000 31 4 Water Tupelo NN,ssa a uatica 5,100 79 11 Swam black um NN,ssa bi ora 6,800 105 15 Laurel oak Quercus lauri olia 900 14 2 Overcu Oak Quercus h'rata 4,800 74 11 Swam Chestnut Oak Quercus michauxii 2,000 31 4 Willow oak Quercus hellos 7,100 110 16 Bald Cypress Taxodium distichum 6,900 107 15 Total: 44.700 STREAM CONSTRUCTION Stream construction began in October 2007 and was completed in February 2008. The channel construction established stable cross-sectional geometry, restored planform sinuosity, and increased in- stream pools and other streambed diversity to improve benthic habitat. The total restored length is 10,471 linear feet. An additional 678 linear feet of headwater stream restoration was achieved on Reach lA and 113. Reach ]A and Reach 113 headwater streams are located in the wetland restoration area adjacent to the restored Flat Swamp Creek. To begin construction, a survey crew staked out the new channel alignment. A construction access route was designated to access the work area from the established farm path. The channel was constructed in sections from downstream to upstream such that the existing channel remained open and no pump-around was required. Material for root wads, log veins, and log toes was obtained on site and stockpiled. An excavator with a hydraulic thumb was used to construct the new channel and install the structures. Channel construction and structure installation were completed sequentially in sections. Following construction of the new channel, the existing stream was filled with material excavated from the new channel and floodplain areas. Native material revetments were installed as needed to reduce bank stress, provide grade control, and increase habitat diversity. WK Dickson & Co., Inc. • • FLOOGIE STREAM AND WETLAND MITIGATION PROJECT MITIGATION PLAN 0 Natural channel design techniques have been used to develop the restoration designs described in this • document. The reference reach design method was determined to be appropriate for this project because • the watershed is rural, the causes of disturbance are known and have been abated, and there are no infrastructure constraints. The original design parameters were developed from reference stream data • and applied to the subject stream. The parameters were then analyzed and adjusted through an iterative • process as necessary using analytical tools and numerical simulations of fluvial processes. The designs presented in this report provide for the restoration of natural Coastal Plain sand-bed channel features • and stream bed diversity to improve benthic habitat. The proposed design will allow flows that exceed • the design bankfull stage to spread out over the Iloodplain and provide a portion of the hydrology for the restored riverine wetland. Construction techniques pertaining to headwater stream restoration Reaches IA and 113 included back- filling and plugging existing ditches, restoring microtopography, planting wetland species, and relocating an existing farm road outside of the easement. A typical ditch plug was 15 feet wide and extended approximately six inches above the ditch bank elevation. Plugs were constructed of compacted fill (clay or sandy clay) in 12 inch lifts with the upper 18 inches minimally compacted to facilitate plant growth. Plugs were spaced such that successive plugs are no more than 12 inches in elevation below the adjacent upslope plug. Specific to the headwater streams, culverts were placed beneath the new access road to convey surface flow into the wetland through the headwater valleys. The culverts were placed such that the agricultural ditches upgradient of the restoration area will remain open. Grading included microtopograhy on the tloodplain to create hydrologic retention and to encourage species diversity. Locations of pertinent restoration features are given in the As-Built drawings Sheet 18A (attached). • RIPARIAN PLANTING All riparian vegetation was planted at the site March 18-26, 2007 after stream construction was complete. Bare root native tree species were planted to establish forested riparian buffers of approximately fifty feet on both sides of the restored stream and other disturbed areas. The initial stocking of riparian plantings across the site was approximately 691 stems per acre. A list of all species planted and their percent composition is included in Table 2. In addition to the riparian plantings, 4,300 black willow (Salix nigra) and 4,700 silky dogwood (Corpus amomum) live stakes were installed on the outside of stream meander bends and downstream of grade control structures along the entire restoration length. Sod mats of existing riparian vegetation were placed on the stream banks where available. The headwater stream valleys were contained in Zone 1, a wetter zone where inundated and saturated conditions will be typical. Typical species included river birch, green ash, water tupelo, Overcup oak, and bald cypress. Plant materials used were bare-root seedlings and live stakes. Species selection was based on reference wetland vegetation and literature, and will produce a diverse habitat that includes mast producing species and fast-growing early successional species. The initial stocking density of plantings across the wetland sites was approximately 691 stems per acre (9 ft. X 7 ft. spacing). All disturbed areas were seeded with appropriate permanent and seasonal temporary seed mixes to provide erosion control. • COMMENTS AND OBSERVATIONS Construction progressed steadily throughout the fall and winter and was completed on time. The majority of the project was built according to the design plans. Minor alterations to horizontal structure placement and channel alignment did occur and were approved by EBX and its engineer WK Dickson. Specifically the following changes were made: • • Five proposed log ramps from STA 72+50 to STA 75+50 were replaced with four rock weirs due to stability concerns in the sandy bank and bed material; • • Several minor changes to the channel alignment were made from STA 58+00 to STA 72+00 to protect existing mature bottomland hardwood trees; WK Dickson & Co., Inc. 7 FLOOGIE STREAM AND WETLAND MITIGATION PROJECT MITIGATION PLAN • The proposed relocated farm path outside of the wetland restoration area was moved to the east side of the field ditch, and eight culverts were installed beneath the farm path to convey runoff into the wetland restoration area; • A small drainage Swale was constructed along the northern edge of the wetland restoration area to facilitate drainage off of existing agricultural fields and into the wetland restoration area and restored channel; • Five log grade control structures were removed from Reach 4 due to inconsistencies with the surveyed thalweg and field conditions (STA 80+67, 82+73, 83+54, 86+02, and 92+97); as proposed, the structures would have been located at a lower elevation than downstream grade control structures and therefore offer no stability function; • Breaks were constructed in the farm path adjacent to Reach 4 (STA 77+00 to STA 102+00) approximately 50 feet wide and spaced every 200 feet to facilitate overbank flooding and reconnection with the floodplam. WK Dickson performed weekly or bi-weekly construction observation from October 29, 2007 through planting on March 12, 2008. All construction observations were recorded in a notebook with standard forms and plan sheets. The notebook is on file at WK Dickson. WK Dickson observed installation of several of each structure type, and assisted the contractor on proper installation early in the construction process. All structure locations were verified both horizontally and vertically weekly to ensure proper placement. WK Dickson also performed spot checks of bed elevation, channel dimension, and sinuosity. The contractor performed superbly and only a few minor problems required repair. All construction was performed in the dry, and all disturbed areas were immediately stabilized with temporary seed and mulch following construction. Proper erosion control was maintained throughout construction and no large sediment discharges were observed. The early construction period was marked by consistent dry weather and proceeded rapidly. From December through February rainfall was consistent and included several large storms. The restored channel was connected in late January and immediately had two out of bank flood events. Only minor damage was observed and was easily repaired. A walkthrough of the near-complete site was conducted with WK Dickson, EBX, and the contractor on February 1 1 to develop a final punch list of items to complete. The contractor completed the punch list and construction was documented as complete on February 26, 2008. Planting was documented as complete on March 19, 2008. Following construction, a small area of bank erosion was observed at STA 34+00 where consistent flow from the old backfilled channel enters the restored channel. This area will be observed to make sure that stream stability or wetland hydrology is not compromised. The final design plans described 10,294 linear feet of stream restoration. The as-built survey documented construction of 10,471 linear feet of restored stream and 678 linear feet of headwater stream restoration. Comparison of final design plans with the as-built survey shows several locations where the constructed channel deviates slightly from the design. The deviations are very slight and imperceptible on the ground. The proposed 25.19 acres of wetland restoration will be documented through groundwater monitoring and observations of site conditions. Following completion of restoration activities, several months of normal rainfall occurred, and significant surface flow was observed from the adjacent agricultural ditches onto the restored wetland area. This surface flow was observed for several days or weeks following rainfall events. In addition to sheet flow across the wetland area, small braided channels or rills were observed forming near the culvert outlets into the restoration area. These small braided channels concentrated flow as the channel approached the restored Flat Swamp Creek, and minor head-cutting was observed. Based on observed channel formation and the consistency and longevity of surface flow following rain events, it appears that Reach ]A and 1 B are headwater streams. DWQ Stream Identification Forms (v3.1) were completed for the post-construction conditions (Appendix D). Reach IA scored 23.25 points. Reach 1B scored 23.25 WK Dickson & Co., Inc. 8 • • FLOOGIE STREAM AND WETLAND MITIGATION PROJECT MITIGATION PLAN points. All groundwater monitoring locations had wetland hydrology and consistent saturation and seepage was observed across the wetland restoration area. MONITORING SET-UP The five-year monitoring plan for the Floogie Stream and Wetland Mitigation Project includes monitoring criteria for wetland hydrology, wetland vegetation, stream channel stability, stream hydrology, riparian vegetation, and rainfall. Shortly after completion of construction and planting, an as-built survey was conducted. Following completion of the as-built survey, the monitoring program set-up was completed. This task included installation of nine groundwater gauges (three in a reference wetland), two crest gauges, a rain gauge, 20 permanent stream cross sections, and 18 vegetation monitoring plots. Specific locations of vegetation plots, permanent cross sections, and gauges are shown on the as-built drawings (Appendix E). Photos were taken to document the as-built condition of the vegetation plots, Reach IA and 1B, and cross sections throughout the project (Appendix A, Appendix B, and Appendix C ). WETLAND HYDROLOGY Successful establishment of wetland hydrology will be demonstrated by a wetland hydroperiod in excess of 7.0 percent of the growing season. Six groundwater gauges have been installed across the restoration areas to provide representative hydrologic data across the site. The gauge data will be compared to contemporaneous reference wetland well data. WETLAND VEGETATION Five vegetation sampling plots were established within the wetland restoration area to monitor the success of planted vegetation. The wetland vegetation plots are 0.10 acres in size. The vegetation plots are distributed across the site, but the precise location and orientation of the plots was random (see locations on as-built drawings in Appendix Q. The plots cover approximately 2 percent of the planted wetland restoration area. Each planted woody stem is identified with a permanent number on an aluminum tag attached to the tree. Total planted trees are summarized in Table 3. Table 3. Wetland planted trees per of and corres ndi Lag stocking levels Plot Trees Observed Stocking bevel per acre) 1 61 610 2 60 600 3 70 700 4 69 690 5 65 650 Average: 650 Planted woody species will be monitored twice per year for the first three years, and annually in monitoring years four and five. Herbaceous plant cover will be assessed annually using qualitative observations of species percent cover. Successful establishment of wetland vegetation will be the survival of 260 planted trees per acre following five years of monitoring, with 320 planted trees per acre at the end of the third year of monitoring as an interim measure of success. STREAM STABILITY CROSS SECTIONS WK Dickson & Co., Inc. 9 FLOOGIE STREAM AND WETLAND MITIGATION PROJECT MITIGATION PLAN The mitigation plan for the Floogie project requires 20 cross sections to be monitored on the restored channel. The cross sections were established during monitoring set-up in evenly distributed pairs of one shallow and one pool per 1,000 linear feet of restored stream. Locations of cross sections are specified on as-built drawings in Appendix C. The cross sections were surveyed during the as-built survey. The cross section surveys and photos are shown in Appendix B. Each cross section will be photographed and surveyed annually, including measurements of floodplain, top of bank, bankfull, edges of water, and thalweg. In addition, any fluvial features present will be documented. Flat Swamp Creek is a sand bed channel and is expected to have a dynamic bed and profile. LONGITUDINAL PROFILE Longitudinal profiles will be surveyed in years one, two, three, four, and five of the monitoring period. The length of the measured profile will he at least 3,142 linear feet (30% of the restored length). Features measured will include thalweg, inverts of in-stream structures, water surface, bankfull and top of low bank. The longitudinal profiles presented in Appendix C were derived from the as-built survey data. HYDROLOGY Two crest gauges were installed at the site: one at station 38+25 and one at station 88+25 (Appendix Q. Crest gauges will be checked monthly to document high flows. During the gauge inspections any high water marks or debris lines observed will be documented and photographed. HEADWATER STREAMS The headwater stream restoration will he monitored using visual observations of surface flow, photographs of dye marking, and movement of deposited sand. Monthly site visits will be conducted during the growing season. At each site visit, a visual observation of each restored headwater stream will be made to document the presence of surface water. When surface water is present, a water soluble dye will be released in the water at a reference location, and time-sequenced photographs will be taken to document water movement. In addition to the visual observations, a small amount of white sand will be left at a reference location in each headwater stream. This sand will be observed monthly to determine if, and how much, the deposit has moved down the valley. Both photographs and qualitative observations will document this sand movement. Records of stream flow will be correlated with on-site rainfall data to document intermittent or seasonal flow. Success criteria will be met if the headwater streams exhibit intermittent or seasonal flow. Monitoring results will be presented in the annual monitoring report. RIPARIAN VEGETATION Thirteen semi-permanent vegetation sampling plots were established along the stream restoration riparian buffer to monitor the success of planted vegetation. The 0.05 acre vegetation plots were distributed across the site, but the precise location and orientation of the plots was random (see locations on as-built drawings in Appendix Q. The plots cover approximately 2 percent of the planted riparian area. Each planted woody stem is identified with a number on an aluminum tag attached to the tree. Total planted trees are summarized in Table 4. Table 4. Riparian planted trees per lot and corresponding stacking levels Plot Trees Observed Stocking Level (per acre 6 40 800 7 37 740 8 49 980 9 45 900 10 50 1000 WK Dickson & Co., Inc. 10 FLOOGIE STREAM AND WETLAND MITIGATION PROJECT MITIGATION PLAN 11 47 940 12 45 900 13 40 800 14 51 1020 15 48 960 16 49 980 17 30 600 18 28 560 Average: 860 Planted woody species will be monitored twice per year for the first three years, and annually in monitoring years four and five. Herbaceous plant cover will be assessed annually using qualitative observations of species percent cover. Successful establishment of wetland vegetation will be the survival of 260 planted trees per acre following five years of monitoring, with 320 planted trees per acre at the end of the third year of monitoring as an interim measure of success. BENTHIC MACROINVERTEBRATES Benthic m acroi n vertebrates will be monitored on the Floogie site. Pre-construction monitoring was performed prior to disturbance to the existing channel in January 2008. Following restoration, Year I monitoring will be conducted in January 2009. Additional monitoring will be conducted in January of 2011 (Year 3) and 2013 (Year 5). Sampling will take place at two sites along the restoration reach and one site upstream of the project area on Flat Swamp Creek. Restoration Site I will be near the downstream end of Reach 4 (between STA 101+00 and 102+00). Restoration Site 2 will be near the downstream end of Reach 2 (between STA 36+00 and 37+00). In addition to the restoration sites, one sample will be taken upstream of the project area on Flat Swamp Creek. The Qual 4 sampling method outlined in Standard Operating Procedures for Benthic Macroin vertebrates (NCDWQ 2006) will be utilized at all sampling locations. A North Carolina Division of Water Quality stream habitat evaluation form will be completed at each sample reach during each sampling event. This form requires that 100 meters of stream be evaluated. At each sampling site, habitat will be evaluated approximately 50 meters upstream and 50 meters downstream of where m acroin vertebrates are collected. All m acroin vertebrates collected will he identified to the lowest taxonomic level by a laboratory certified to do macroin vertebrate identifications through the DWQ Lab Certification program administered by the Environmental Services Section. Findings and conclusions will be reported in the subsequent annual monitoring report. Year 5 benthic macroinvertebrate data will be provided as a supplement following the Year 5 report submittal. WK Dickson & Co., Inc. 11 FLOOGIE STREAM AND WETLAND MITIGATION PROJECT MITIGATION PLAN Appendix A As-Built Vegetation Plot Photos WK Dickson & Co., Inc. Floogie Wetland Restoration Veg Plot 1 Floogie Wetland Restoration Veg Plot 2 kM? ?r X04. f,2 rifi+ 6: `?•6r 1 ? ry-d_ .?. KM Floogie Wetland Restoration Veg Plot 3 e.?. ? Vp L ?r z Awl J ?( y . &K ..x ,.. a`Y?•' ?s„ x,.,,?$ a f .`a'il Floogie Wetland Restoration Veg Plot 4 Floogie Wetland Restoration Veg Plot 5 ., rox VsPj. _. "W . 4 ! ]Lip,. i +Ms •., ,?t?: .. s? .- i.? 44 t ?{ wr' t'1? ? 1c. Ate, ? ?+" ?. G6' ? ' 4`, •r "?', ? Sw ? ;?•4'? re^... ?..: e "4. -. ? ?.?..+p H'I'V . ,?1. +Pt ?4d?. ,.. Floogie Stream Restoration Veg Plot 6 • . ?...?.. .yes-.. -.?...N? . ,. ?^-.,..•.,.,srw ,... ?aV1lb?eoY itr ti. .• .vim .Ml. .J I;` k Floogie Stream Restoration Veg Plot 7 . V .. 41_ Floogie Stream Restoration Veg Plot 8 x,? • h } Y.''' ? Floogie Stream Restoration Veg Plot 9 r _ F wrw ?.. 'T'om ?I° Pit _ 74 r . a _. -o r Floogie Stream Restoration Veg Plot 10 _ _"°'r tnnwr? i - VP i. t„ f w -'.e C I 01 4 4W P 'two .. 0111 Floogie Stream Restoration Veg Plot 11 r• . r R s ,?.,? ? " .} ' - ' - ,' . ? ?' : ?r? ? .+ .af "ic."' `. ? t ` . ? .. t ?. Floogie Stream Restoration Veg Plot 12 n i Nr 7l m a, t'w ' r -AMON p} Floogie Stream Restoration Veg Plot 13 i M ? y? M. E,`?•MS 4 CIA. Floogie Stream Restoration Veg Plot 14 Floogie Stream Restoration Veg Plot 16 Floogie Stream Restoration Veg Plot 15 VP 18 77. J` rr ?rro'? `? p?a?"p ?' '," ?K. 'til ?` ? +`.?.,?. -•MC a c ?Y ?-x. J W?; ?j/ry ?'y?R ,.v9',?+?4 ,yam ?y*i4 .„. Floogie Stream Restoration Veg Plot 18 Floogie Stream Restoration Veg Plot 17 • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • FLOOGIE STREAM AND WETLAND MITIGATION PROJECT MITIGATION PLAN Appendix B As-Built Cross Sections WK Dickson & Co., Inc. I• l?.?.u t?it::.-'a.e..? rte..:.. rt:?':. '£Wa'.o Right hank U Floogie As-Built - Cross Section 1 - Pool 47 46 c 4t 14 q k& 41 f 4 ' _ I I 111 2I1 ill 111 SO fill 70 slali'm I II) -IA,lWill Right bank Floogie As-Built - Cross Section 2 - Riffle ar 47 - -- --- -- - - -- 36 _ _- 44 H iii 20 111 Stamm 'I, ight ban Floogie As-Built - Cross Section 3 - Pool 48 47 46 45 44 43 42 41 a? ill 4l1 50 60 70 SO Station (II) -M-Built 48 47 46 = 4i 44 43 42 Floogie As-Built - Cross Section 4 - Riffle n In ?U in 4, ;u 6u 70 tilaunn i Il i \? Will nk 46 4? 44 4? 4? Floogic As-Built - Cross Section 5 - Riffle II In '_II lU 40 5u fill 71 Station (II) -,, -A., -Built 46 45 44 43 42 41 40 10 20 Floogie As -Built - Cross Section 6 - Pool 30 Station (ft) AAs -Built 40 50 60 70 y+et b r t ?:ui a5 44 c 43 4? 41 t a. •? t `ytm,'.?wf?hFac Floogie As-Built - Cross Section 7 - Riffle I III ?11 ill ;II 50 fill Slalom (It) \,-B It .z,a.'` i r+.9..? rya cy y? .t. ..•r i .a (FIT),-,ilk 4S 44 43 42 41 40 Floogie As-Built - Cross Section 8 - Pool I1 III 2211 W 4,1 III fill stmimi (it) %, HL1111 Floogie As-Built - Cross Section 9 - RiMe 45 94 41 - 42 41 -- - - - lU U 11) -u to 4H 11) 60 70 stauun 01, Floogie .As-Built - Cross Section 10 - Pool ?4 4; 42 c 41 J 40 9 IS 0 10 20 70 40 50 60 70 80 Station (li) Floogie As-Built - Cross Section I 1 - Riffle 45 44 41 42 41 40 o iii ?u 3n an 5n ru ??? xn Slaiun Ui? °.. :An-Bulb Floosie 4s-Ruill - Cross Section 12 - Pool 45 44 41 c 42 a 41 40 Su o l0 2n to 411 5u 611 711 station 1111 Floogie As-Built - Cross Section 13 - Pool 4a 43 42 41 411 19 $ Sri 0 10 2U "o 40 Sn fiu 70 stmi'm 1111 ?'°`°._ As-13u111 ight ban 4 a; 42 41 si i 39 is Floogie As-Built - Cross Section 14 - Riffle u a 2u :n ;u So 60 Station ft k, 13 I . nr ? Jc ? ?4j?? '^. ight ban Floogie As-Built - Cross Section 15 - Riffle 42 41 411 -- J 19 iS 37 o to ?u U 40 ;n 6o 711 Station 1 iii I; It ).Ink Floogic A,,-Built - Cross Section 16 - Pool 3 ' _ 41 . all .. ..., ?,.? 38 37 .; i? u In 'a u 1n :n /,n SIalltl11 II, <1 Yl? ? ? ?p ?? 1?4 . q A 4yy v r . 4d: Left 1.111 42 41 411 39 3x 17 36 35 34 fight ban Floogie As-Built - Cross Section 17 - Pool II III ?11 311 411 50 (10 70 Slatiun (II) -'-"®' ,Buill Floogie As-Built - Cross Section 18 - Riffle 42 41 au zs 37 16 U III ?II 711 411 50 fill 70 HII Nation 1111 _.As-Built Floogie As-Built - Cross Section 19 - Pool 41 40 3y c 38 a 37 36 35 34 U 111 211 30 40 50 61) 70 Station (II) Al-]W1 SO ¦ r 1) ight ban Floogie As-Built - Cross Section 211 - Riffle 41 41) 39 - 3t J 37 36 ;5 11 111 211 31) 411 51) 61) Iii NO Station (It) Ax-Ifuill 911 11111 FLOOGIE STREAM AND WETLAND MITIGATION PROJECT MITIGATION PLAN Appendix C Photos of Headwater Stream Restoration Reaches IA and 1B WK Dickson & Co., Inc. nw : s Y " Z, . a . r -?Ok t F rw Restored headwater stream IA. I Surface flow in restored headwater stream. FLOOGIE STREAM AND WETLAND MITIGATION PROJECT MITIGATION PLAN Appendix D DWQ Stream Forms WK Dickson & Co., Inc. • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • North Carolina Division of Water Quality - Stream Identification Form; Version 3.1 Date: j "? ?d Project: (OO le Latitude: Evaluator: J Site: - JM ^,Mongitude: Total Points: Other Stream is at least intermittent Zt County:r?"+e e.g. Quad Name' if a 19 or ensnnial if a 30 A. Geomorphology subtotal Absoot.: ::Weak: _ MoWerate:: ;;. trong 1a. Continuous bed and bank 0 1 2 3 2. Sinuosity 1 2 3 3. In-channel structure: riffle-pool sequence 1 2 3 4. Soil texture or stream substrate sorting 0 2 3 5. Active/relic floodplain 0 1 3 6. Depositional bars or benches 0 2 3 7. Braided channel 1 2 3 8. Recent alluvial deposits 0 1 2 3 9' Natural levees 1 2 3 10. Headcuts 0 1 2 3 11. Grade controls 0 0.5 1 1.5 12. Natural valley or drainageway 0 0.5 1.5 13. Second or greater order channel on existing USGS or NRCS map or other documented evidence. o = 0 Yes = 3 Man-made ditches are not rated; see discussions in manual R Hvdrnlnav lSuhtntal = el E_ 1 14. Groundwater flow/discharge 0 1 3 15. Water in channel and > 48 hrs since rain, Qr Water in channel -- d or growing season 0 1 ® 3 16: Leaflitter 1.5 1 0.5 0 17, Sediment on plants or debris 0 0.5 1 1.5 18. Organic debris lines or piles (Wrack lines) 0 0.5 1 1.5 19. Hydric soils (redoximorphic features) present? No = 0 Yes 1. C. Bioloav (Subtotal = 6e o 1 20 . Fibrous roots in channel 3 2 1 0 21b'. Rooted plants in channel 3 2 1 0 22. Crayfish 0 1 1.5 23. Bivalves 0 1 2 3 . 24. Fish 0 0.5 1 1.5 25. Amphibians 0 0. 1 1.5 26. Macrobenthos (note diversity and abundance) 0.5 1 1.5 27. Filamentous algae; periphyton 0 1 2 3 28. Iron oxidizing bacterialfungus. 0 1 1.5 i9 P. Wefland plants in streambed FAG = 0.5; FACW = 0.75: OBL 1. SAV = 2.0; Other = 0 items zu and n focus on the presence or upland plants, item 28 focuses on the presence of aquatic or wetland plants. Notes: (use bads side of this form for additional notes.) Sketch: _l ?lr`s 4?"11 !-?a5 60ey Iyj boc:(-,,'{ ell ldl??Gffr,(??,?(, c/Pl{?ari O?Set?tsn?a P?S? A1P- rf'.3 North Carolina Division of Water Quality -Stream Identification Form; Version 3.1 Date: ??'7 OQ Project: ?(D IQ Latitude: Evaluator. Dry Site: ?C &c 1 3 - - , Longitude: Total Points: (3e Other Stream Is at feast intemiltient Z o, O County: cf e.g. Quad Name: if ;' 19 or rennJaJ if 2 30 n A. Geomorphology Subtotal = Or U Atfseet .:Weak Moderate .; Stiitg 1°. Continuous bed and bank 0 1 2 2. Sinuosity 1 2 3 3. In-channel structure: riffle-pool sequence 0 1 2 3 4. Soil texture or stream substrate sorting 0 2 3 5. Activeirelic floodplain 0 1 3 6. Depositional bars or benches 0 2 3 7. Braided channel 1 2 3 8. Reoent alluvial deposits 1 2 3 9 8 Natural levees 1 2 3 10. Headcuts 1 2 3 11. Grade controls CO) 0.5 1 1.5 12. Natural valley or draina eway 0 0.5 1 1.5 13. Second or greater order channel on existing USGS or NRCS map or other documented evidence. o - 0 1 Yes = 3 -1 ° Man-made ditches are not rated; see discussions in manual o u...d..,l.,.... /O. kt-t-1 - A. D 1 14. Groundwater flow/discharge 0 1 2 3 15. Water in channel and > 48 hrs since rain, gr Water in channel - d or growing season 0 1 2 3 16. Leaflitter 1.5 1 0 0 17. Sediment on plants or debris 0 0.5 C 11 1.5 18. Organic debris lines or piles (Wrack lines) 0 0,5 - 1 1.5 19. Hydlic soils (redoximorphic features) present? No = 0 Y = 1 r mi-l , /G J,f-f.t = (')r D 1 2C P. Fibrous roots in channel 3 2 0 ii -75. Rooted plants in channel 3 2 0 22. Crayfish 0 1 1.5 23. Bivalves 1 2 3 24. Fish 0.5 1 1.5 25. Amphibians 0. 1 1.5 26. Macrobenthos (note diversity and abundance) 0 0.5 1 1.5 27. Filamentous algae; periphyton 0 1 2 3 28. Iron oxidizing bacteda/fungus. 0 0. 1 1.5 29 . Wetland plants in streambed FAC = 0.5; FACW = 0.75; 0%:i 1. SAV = 2.0; Other = 0 "Items 20 and 21 focus on the presence or upiano plants, item za rocuses on ine pimulnz ui nyuau? r•?• •"• Sketch: Notes: (use backside of this form for additional notes.) G , T-h,.S ?pr,? ?.,i?cs l??P?f htw'( do (d4&/ -"D_ Trt%. T Aft- CAa??e 1 t S G k") pycat1a ('d kid vru ( d(t(= -larlr t, ieAy' V North Carolina Division of Water Quality- Stream Identification Form; Version 3.1 Date: Project: Ram I d Latitude: Evaluator: Site: fid^Longltude: rf-SAMO Total Points: Other Stream is at least Intermittent County: If z 19 or perennial if a 30 Z 604-1'e e. g. Quad Name: JI A. Geomorphology (subtotal= AbOont Weals _: Modelrate::. : '€$t tt 18. Continuous bed and bank 0 1 2 3 2. Sinuosity 0 2 3 3. In-channel structure: riffle-pool sequence 0 2 3 4. Soil texture or stream substrate sorting 0 2 - 3 - 5. Activeirelic floodplain 0 '1 (32 3 6. Depositional bars or benches 1 2 3 7. Braided channel 0 1 3 8. Recent alluvial deposits 0 1 2 3 98 Natural levees 1 2 3 10. Headcuts 1 2 3 11. Grade controls 0 0.5 1 1.5 12. Natural valley or drainagewa 0 0.5 1 1.5 13. Second or greater order channel on existing USGS or MRCS map or other documented evidence. Yes = 3 man-maae ancnes are not rated; see discussions in manual B. Hvdrolnav lSuhtntal = - i 14. Groundwater flow/discharge 0 1 3 15. Water in channel and > 48 hrs since rain, Q Water in channel - d or growing season 0 1 3 16. Leaflitter 1.5 0.5 0 17. Sediment on plants or debris 0 1 1.5 18. Organic debris lines or piles (Wrack lines) 0 1 1.5 19. Hydric soils (redoximorphic features) present? No = 0 Yes .5 C. Bioloav /Subtotal = qi 57?- 1 26b. Fibrous roots in channel 3 2 0 21 . Rooted plants in channel 3 2 0 22. Crayfish 0 .5 .1 1.5 23. Bivalves 1 2 3 24. Fish 0.5 1 1.5 25. Amphibians 0 1 1.5 26. Macrobenthos (note diversity and abundance) 0.5 1 1.5 27, Filamentous algae; periphyton 1 2 3 28. Iron oxidizing bacteria/fungus. 0.5 1 1.5 29b. Wetland plants in streambed FAC = 0.5; FACW = 0.75; 96L = 1.5 SAV = 2.0; Other = 0 nems zu ano [t Locus on the presence of upland plants, Item 29 focuses on the presence ofIltrnaM or wetland plants. Sketch: Notes: (use back side of this form for additional notes.) North Carolina Division of Water Quality - Stream Identification Form; Version 3.1 Date: - D Project: jr?d If ?' Latitude: Evaluator: DPT Site:2MA 13 - POS??- C Longitude: e'S vn Total Points: Other Stream is at least Intermittent County: arf io e.g.Quad Name: if 2:19 or perennial if t 30 A. Geomorphology Subtotal = Absenf °; ? Wa>ak .. .. llApderiiite : ;;;:: ;Strglit 18. Continuous bed and bank 0 1 2 3 2. Sinuosity 1 2 3 3. In-channel structure: riffle-pool sequence 0 2 3 4. Soil texture or stream substrate sorting 0 2 3 5. Active/relic floodplain 0 1 3 6. Depositional bars or benches 1 3 7. Braided channel 0 1 2 3 8. Recent alluvial deposits 0 QU) 2 3 9' Natural levees 1 2 3 10. Headcuts 0 1 2 3 11. Grade controls Cb> 0.5 1 1.5 12, Natural valley or drain ewa 0 0.5 1.5 13. Second or greater order channel on existin4 USGS or NRCS map or other documented evidence. I ?ff I Yes = 3 I ° Man-made ditches are not rated; sees discussions in manual Q Llvrlrnlnnv /Pi ihfnfal = I di 1 14. Groundwater flow/discharge 0 1 2 3 15. Water in channel and > 48 hrs since rain, or Water in channel - d or rowin season 0 1 2 3 16. Leaflitter 1.5 1 0 17. Sediment on plants or debris 0.5 1 1.5 18. Organic debris lines or piles (Wrack lines) 0.5 1 1.5 19. Hydric soils (redoximorphic features) present? No = 0 Yes C Rinlnnv /Ci ihtnfal = q 15 - 1 20b. Fibrous roots in channel 3 2 0 21b. Rooted plants in channel 3 2 0 22. Crayfish 0 .5 1 1.5 23. Bivalves 2 3 24. Fish 0.5 1 1.5 25. Amphibians 0 1 1.5 26. Macrobenthos (note diversity and abundance) 0.5 1 1.5 27. Filamentous algae; periphyton 1 2 3 28. Iron oxidizing bacteriatfungus. 0 0.5 1 1.5 29 . Wetland plants in streambed FAC = 0.5; FACW = 0.75; OBL 1. SAV = 2.0; Other = 0 Items 20 and 21 Locus on trle presence or uplana piants, nem ze rocuses un urn p ubmwo ul uyuuw ro??a••? r+ a w Sketch: Notes: (use back side of this form for additional notes.) 21?G1? - 1•r?5 ?l?G -?, ? 1y a ?'r.!& (?4'1 ?(° }f f P5 f6l/ 10/?• 1 4, FLOOGIE STREAM AND WETLAND MITIGATION PROJECT MITIGATION PLAN Appendix E As-Built Plans WK Dickson & Co., Inc. N M f N m r` m O? O H M N b Op O? N O W i TW W W W W W W W W W W J J J J J J J J J J J J J J J J t Cf) rc z a a rc rc rc rc rc rc rc z rc rc rc rc r a a a a a a a a a a a a a a a a ii it tl m it iI 1I ii tl it iI iJ ai ? AI Al N ? ?'+ ° 5 5 0. 3 CL S 5 0. 5 5 5 s s z z a a a a a a a m a a a a a m a a a a z z 8 N 1~/1 N N N ? N N N N N ? y N N N 3 3 3 W ? O F? I a U O da Nz W? o U O ? O r? ?a•a"•ky, lf` 1 - ??,,,? , • t tiff. - , - 5 ? 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