NCC190682_ESC Approval Submitted (3)_20190620

1PISGAH NATIONAL FORESTDavid K. Stern, PLS L-1301475 Church Hollow RoadBoone, NC 28607828-963-5331 [e-mail] 27Apr. 23, 2019RFM & Gwaltney Farms, LLC306 E Main St Ste 200Lakeland, FL 33804Deed Book 520/2410 Avery County RegistryMichael E. Warnock306 E Main St Ste 200Lakeland, Fl 33804863-640-8529 [e-mail] NATIONAL FORESTRed Fox Meadows
EROSION CONTROL NARRATIVERed FoxMeadowsErosion and Sedimentation Control Planfor Construction of Subdivision Roads atRed Fox Meadows2Erosion and Sedimentation Control PlanRed Fox Meadows SubdivisionMarch 2019Town of Banner Elk Zoning Jurisdiction, Banner Elk Township, Avery County, North CarolinaNarrativeProject DescriptionThe purpose of the project is to clear, grub, grade, and stabilize roads for development of Red Fox MeadowsSubdivision. Construction will affect 4.351 acres and three major drainage areas. During construction the sitewill be broken into less than one acre areas drained into temporary sediment traps. After vegetative establishmentthe site will be returned to semi-natural drainage. Original design is to meander alignment to achieve a maximumof 12% grade and allow for positive storm drainage. Pipe structures are designed for a 25 year storm period.Erosion control measures are designed for a 10 year storm period and 75% trapping efficiency for the sedimentbasins. Design alignment is to stay outside of Trout Buffer of stream UT-1 (see Sheets 6 & 7) on westernboundary (along boundary line) and stream UT-1B within basin except for two crossings UT-1B and one ofUT-1B1. The the residential sites are to be located on ridges. Project will be stabilized as gravel roadbed withremainder areas stabilized with vegetation. Since project is linear, it can be phased so there will be minimalamount of un-stabilized areas undergoing grading. Project is low density with post development impervious areaaffecting 10.28% of boundary (see Sheet 10).LocationThe site is located on the south side of Beech Mountain in the eastern side of NC 184 1.15 mile north of theintersection of NC 194 and with NC 194. Drainage is to Whitehead Creek, a tributary of Elk River and theWatauga River Basin (in Tennessee).Site DescriptionThe site is on an southwestern facing slope of Beech Mountain. It is currently farm pasture land with some forestland in the lower basin areas. There are some moderate to steep cross slopes within the alignment area. Theaverage project slope for the 48.4 acre boundary (51.0 acre slope area) is 28.6% with an average elevation of5253.6'. See Sheets 6 & 7 for tributary drainage into Whitehead Creek crossing under NC Hwy 184 via a 36"culvert. New access road affects three drainage areas of project boundary (one with a spring branch)Adjacent PropertyLand use in the vicinity of Project is single Family residential to the north and tree farm to the south. Someresidential development exists in the watershed above the spring branch crossings.Estimated Start date: May 2019Estimated End Date: Prior to September 2019Soils See Sheet 4 for soils map. Subject to verification by project soil scientist.Pineola SeriesDepth class: Moderately deepDrainage class: Well drainedDepth to seasonal high water table: More than 6.0 feetPermeability: ModerateParent material: Residuum affected by soil creep in theupper part, weathered from low-grademetasedimentary rockLandscape: Intermediate mountains in the central andnortheastern parts of the countyLandform: Mountain ridges and slopesLandform position: Summits and side slopesSlope range: 2 to 30 percentTaxonomic classification: Fine-loamy, mixed, mesicHumic HapludultsNotes:1.Contact person responsible for maintenance.Michael Warnock863-640-85292.Areas are by coordinate geometry as queried in AutoCAD software.3.Material handling procedures are to to be subject to requirements shown on Sheet 26 which includesdetails for structural BMPs to be installed to manage anticipated materials.EROSION CONTROL NARRATIVERed FoxMeadowsErosion and Sedimentation Control Planfor Construction of Subdivision Roads atRed Fox Meadows2Temporary Sediment and Erosion Control Measures and PracticesTemporary Gravel Construction Entrance/exit (see Sheet 18):·Prior to any land disturbing activity activity, a temporary construction entrance will be constructed at thenew intersection at NC Highway 184. Coordination of installation with NCDOT is also required accordingto Driveway Permit.·As this is to be part of the final driveway alignment, the intersection will be graded to finished sub-grade,then graveled with large 3 inch stone to be covered later with clean crushed stone for the final road surface.·The purpose is to trap and collect mud and sediment from the construction vehicles preventing droppingmud and sediment onto NC Hwy 184.·The entrance needs to be a minimum length of 50 feet and at least 12 feet wide. The depth of the 3 inchstone is to be at least 6 inches.·Post-stabilization notification is to be made to ARO.Limits of Disturbance (see Sheet 9 and detail maps)·All construction activities will be limited to grading extents area defined on Sheet 9.·No construction activities are to occur within any of the 25' offset area of any jurisdictional streams asdelineated on Sheet 6 except in the vicinity of the two stream crossings permitted by the Trout BufferVariance request as submitted separately along with this plan set.Temporary Silt fence (see detail on Sheet 19):·Silt fence will be installed at lower extents of clearing areas and along the toes of fill slopes.·Silt fence is to be installed horizontally along contours with ends flared upgrade ("J" hooks).·Gravel breaks will be incorporated along the fence at intervals of 75 to 100 feet or in areas of concentratedrunoff to filter sediment and prevent silt fence from being breached.·The gravel filters are to be made up of 2-3 inch stone covered by clean crushed stone and should be aminimum of 4 feet wide.·Once a portion of the project is completed and permanent measures are effectively controlling sedimentand erosion, the silt fence is to be removed (can be reused on subsequent project phases).Work in Streams, Trout Buffer , and in vicinity of Wetlands:·All installations are to comply with the provisions of the 401/404 and NCG01 Stormwater General Permit.·All work in the streams (e.g. culvert installation) must be done in the dry.·As this plan is being updated mid-construction, any upsize of stream crossings pipe size to comply withstorm drainage computation must be handled by the installation of an additional pipe so as to not impactthe existing pipe or stream flow.·Any sediment impact discharged into UT of Whitehead Creek as a result of previous construction bust beremoved compliant to instructions by NC division of Water Quality staff/standards.Temporary Sediment Traps (see detail on Sheet 20):·Temporary sediment traps for each phase are to be installed before clearing or any other land disturbingactivities.·Once a portion of the project is completed and permanent measures are effectively controlling sedimentand erosion, the temporary sediment basin is to be graded to natural contours, fertilized, limed and seeded.·When project was started in August 2018 the contractor failed to provide the temporary sediment trapspertinent to the clearing and grubbing phase.·Currently the roughed in road has changed drainage patterns to dispersion (pipes and channels) by interimconstruction.·Best management practices may indicate abandoning temporary sediment traps and proceding directly toinstallation of dissapators. Ditch Check Dam and Trap, temporary or semi-permanent:·In the ditch lines, there will be small traps, with clean gravel dams/filters, dug at intervals of 50 to 75 feet.·These traps will trap and contain sediment washed down into the ditch line from the cut and roadbed andwill fill over time. This will prevent sediment from moving into natural drainage ways.Construction to be phased and sequenced:·Project is divided into five phases based on location of temporary sediment traps.Temporary measures are to be maintained: (see Sheet 25)·A maintenance plan is included. (See individual measure details and Sheet 25)Ground cover established (see schedule on Sheet 25):·Temporary groundcover is to be established per DWQ table.in Sheet 25.Permanent Sediment and Erosion Control Measures and PracticesDitch Channels (see detail on Sheet #):·Ditch channels will be graded along the toe of the cut slopes and will incorporate small check damsestablished into the ditch channel every 50 to 75 feet to reduce the amount of sediment reaching thedissipators or cross drainage pipes.·Ditches are to be fertilized, limed, seeded, and covered with a temporary lining as specified.·Once vegetation is effectively controlling sediment and erosion, the temporary check dams and traps canbe returned to ditch line grade, fertilized, seeded, and covered with a temporary lining, if specified, for easeof permanent road maintenance.Dissipators (rip-rap aprons) (see detail on Sheet #):·These are areas below pipe or ditch outlets which will be lined with rip-rap stone to reduce velocity anddisperse flow over wider area to prevent erosion.·These dissipators reduce the force of the water leaving the ditch channel or pipe and are to be sized andlined as specified.Rock pipe inlet protection (see detail on Sheet 23):·Rock Pipe inlet protection shall be installed at pipe inletsSurface stabilization (see detail on Sheet25):·Graded surfaces (cut/fill slopes) are to be stabilized with vegetation as specified in the Vegetation Plan.·Cut slopes are to be left rough, fill slopes are to be tracked.·Slopes and shoulders are to be fertilized, limed, and seeded as soon as possible once final grade has beenreached.Road stabilization (see detail on Sheet 17):·The road is to be final graded to drain to the ditch line and stabilized with a 4" course of NC DOT standardsize stone.Ground cover established (see schedule on Sheet 25):·Permanent groundcover is to be established per DWQ table.Ashe and Cleveland SoilsDepth class: Ashe—moderately deep; Cleveland—shallowDrainage class: Somewhat excessively drainedGeneral texture class: LoamyPermeability: Moderately rapidAvailable water capacity: LowDepth to seasonal high water table: More than 6.0 feetHazard of flooding: NoneShrink-swell potential: LowSlope class: Steep or very steepExtent of erosion: Slight, less than 25 percent of the originalHazard of water erosion: Very severeRock fragments on the surface: About 5 percentstones and boulders that average about 24 to 48inches in diameter and 3 to 10 feet apartOrganic matter content (surface layer): Low to highPotential for frost action: ModerateSoil reaction: Ashe—extremely acid to moderately acid,Cleveland—very strongly acid to moderately acidParent material: Residuum affected by soil creep metamorphic or igneous rockDepth to bedrock: Ashe—20 to 40 inches to hardbedrock; Cleveland—10 to 20 inches to hard bedrockOther distinctive properties: Random areas of seeps and springs; water movement along bedrock contactsof 27Apr. 23, 2019
155311171113111511411116111911141160111211351152113611121138113611371161116815801558155915601559156115621134113411581133113111321122113011311122116911301127113011281166112911201122117011571123112811541126131311401568A V E R Y C O U N T YC A L D W E L LTOMKNOBELEV 4293ROCKY FACERomingerMatheyValle CrucisFoscoShulls MillBOWERSGAPBEECHMOUNTAINPOP. 267SEVEN DEVILSPOP. 132HANGING ROCKMTN.ELEV. 5218BLUERIDGE
PARKWAYPISGAHNATIONALFORESTWATAUGAWATAUGA
RIVER
ForkDu
t
c
h
C
r
e
e
k
C
r
a
b
OrchardCreekBeechTO BANNER ELKCreek16371598WATAUGARIVER111111533214212211051841051941051941151117710515981113164111341131116511421122112311811175W A T A U G AA V E R Yof 27Apr. 23, 2019Red FoxMeadowsErosion and Sedimentation Control Planfor Construction of Subdivision Roads atRed Fox Meadows3of 27Apr. 23, 2019Red FoxMeadowsErosion and Sedimentation Control Planfor Construction of Subdivision Roads atRed Fox MeadowsPROJECT LOCATION MAPNCDOT Avery County Road MapPROJECT
of 27Apr. 23, 2019Red FoxMeadowsErosion and Sedimentation Control Planfor Construction of Subdivision Roads atRed Fox Meadows4of 27Apr. 23, 2019Red FoxMeadowsErosion and Sedimentation Control Planfor Construction of Subdivision Roads atRed Fox MeadowsLocation on Avery County Soils map
of 27Apr. 23, 2019Red FoxMeadowsErosion and Sedimentation Control Planfor Construction of Subdivision Roads atRed Fox Meadows5of 27Apr. 23, 2019Red FoxMeadowsErosion and Sedimentation Control Planfor Construction of Subdivision Roads atRed Fox MeadowsLocation on Valle Crucis Quadrangle (1994 ed)
of 27Apr. 23, 2019Red FoxMeadowsErosion and Sedimentation Control Planfor Construction of Subdivision Roads atRed Fox Meadows6of 27Apr. 23, 2019Red FoxMeadowsErosion and Sedimentation Control Planfor Construction of Subdivision Roads atRed Fox MeadowsJurisdictional Tributaries, Wetlands, & 25' Trout Buffer
of 27Apr. 23, 2019Red FoxMeadowsErosion and Sedimentation Control Planfor Construction of Subdivision Roads atRed Fox Meadows7of 27Apr. 23, 2019Red FoxMeadowsErosion and Sedimentation Control Planfor Construction of Subdivision Roads atRed Fox MeadowsWetlands, & 25' Trout Buffer
of 27Apr. 23, 2019Red FoxMeadowsErosion and Sedimentation Control Planfor Construction of Subdivision Roads atRed Fox Meadows8of 27Apr. 23, 2019Red FoxMeadowsErosion and Sedimentation Control Planfor Construction of Subdivision Roads atRed Fox MeadowsPlanned Post-construction Impervious Areas
of 27Apr. 23, 2019Red FoxMeadowsErosion and Sedimentation Control Planfor Construction of Subdivision Roads atRed Fox Meadows9of 27Apr. 23, 2019Red FoxMeadowsErosion and Sedimentation Control Planfor Construction of Subdivision Roads atRed Fox MeadowsPLAN SHEET INDEX & LIMITS OF DISTURBNCEUpdated disturbed area = 4.05 acresPage 11Page 10Page 12Page 13Page 14
of 27Apr. 23, 2019Red FoxMeadowsErosion and Sedimentation Control Planfor Construction of Subdivision Roads atRed Fox Meadows10of 27Apr. 23, 2019Red FoxMeadowsErosion and Sedimentation Control Planfor Construction of Subdivision Roads atRed Fox MeadowsPLAN DETAILS
of 27Apr. 23, 2019Red FoxMeadowsErosion and Sedimentation Control Planfor Construction of Subdivision Roads atRed Fox Meadows11of 27Apr. 23, 2019Red FoxMeadowsErosion and Sedimentation Control Planfor Construction of Subdivision Roads atRed Fox MeadowsPLAN DETAILS
of 27Apr. 23, 2019Red FoxMeadowsErosion and Sedimentation Control Planfor Construction of Subdivision Roads atRed Fox Meadows12of 27Apr. 23, 2019Red FoxMeadowsErosion and Sedimentation Control Planfor Construction of Subdivision Roads atRed Fox MeadowsPLAN DETAILS
of 27Apr. 23, 2019Red FoxMeadowsErosion and Sedimentation Control Planfor Construction of Subdivision Roads atRed Fox Meadows13of 27Apr. 23, 2019Red FoxMeadowsErosion and Sedimentation Control Planfor Construction of Subdivision Roads atRed Fox MeadowsPLAN DETAILS