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HomeMy WebLinkAboutSW3150205_CURRENT PERMIT_20150512STORMWATER DIVISION CODING SHEET POST -CONSTRUCTION PERMITS PERMIT NO. SW DOC TYPE CURRENT PERMIT ❑ APPROVED PLANS ❑ HISTORICAL FILE ❑ COMPLIANCE EVALUATION INSPECTION DOC DATE c l�s:� f� I� YYYYMMDD In accordance with Title 15 NCAC 2H.1000 and S.L. 2006-246 deed restrictions and protective covenants are required for Hid lots will be subdivided and sold and runoff will be treated in an restrictions and protective covenants are necessary to ensure area consistent with the design criteria used to size the stormv I, Tucker. Land Holdings, LLC c/o David Tucker acknowledge, affirm and agree by my signature below, that I will cause the following deed restrictions and covenants to be recorded prior to the sale of any lot: 1. The following covenants are intended to ensure ongoing compliance with State Stormwater Management Permit Number5kl 3/50 as issued by the Division of Water Quality under the Stormwater Management Regulations. A/- 2'q1r6 2. The State of North Carolina is made a beneficiary of these covenants to the extent necessary to maintain compliance with the stormwater management permit. 3. These covenants are to run with the land and be binding on all persons and parties claiming under them. 4. The covenants pertaining to stormwater may not be altered or rescinded without the express written consent of the State of North Carolina, Division of Water Quality. 5. Alteration of the drainage as shown on the approved plan may not take place without the concurrence of the Division of Water Quality. 6. The maximum allowable built -upon area per lot is _2,800 square feet. This allotted amount ,includes any built -upon area constructed within the,lot property boundaries, and that portion of the right-of-way between the front lot line and the. edge of the pavement. Built upon area includes, but is not limited to, structures, asphalt, concrete, gravel,, brick, stone, slate coquina and parking areas, but does not include raised, open wood decking, or the water surface of swimming pools. OR, if the proposed built -upon areas per lot will vary, please REPLACE #6 above with the following: 6. The maximum built -upon area per lot, in square feet, is as listed below: Lot# .BUA. ...._Lot# .BUA Lot# BUA ..._.Lot# BUA This allotted amount includes any built -upon area constructed within the lot property boundaries, and that portion of the right-of-way between the front lot line and the edge of the pavement. Built upon area includes, but is not limited to, structures, asphalt, concrete, gravel,, brick, stone, ,slate, coquina and parking areas, but does not include raised, open wood decking, or the water,surface of swimming pools. Each lot will maintain a 30" foot wide vegetated buffer between all impervious areas and surface waters. "50 foot for projects located in the 20 coastal counties. 8. All runoff irom the built -upon areas on the lot must drain into the permitted system. This may be accomplished through a variety of means including roof drain gutters which drain. to the street, grading the lot to, drain toward the street, or grading perimeter swales to collect the lot runoff and directing them into a component of the stormwater collection system. Lots that will naturally drain into the system are not required to provide these additional measures. 1FiPMAY_��Q�I�Oj 0 22015 i Form DRPC-3 Rev.2 05Nov2009 Page 1 of 2 5 h/3l 5d o /ssu-,e o S a Notary Public in the , County of A do hereby certify that r W Ulfl d i U C- KJ-4--' personally appeared before me this the -I — day of I 20, and acknowledge the due exec n of the foregoing instrument. Witness my hand and official seal, _uILrv\ _ (-\.,, , SEAL MA I u Ud RtEcc)2 oe.,,i� , (J 3fz— Form DRPC-3 Rev.2 05Nov2009 Page 2 of 2 0 • N .. p High Density Residential Subdivisions_' oZ Deed Restrictions & Protective Covenances A 00 LL�,, 9� 1 In accordance.with Title 15 NCAC 2Ht,10o0 and S.L 2006-246 the Stormwater,Managemenl Re�lalionso' A deed restrictions and protective covenants are required for High Density Residential Subdivisior�:wherP ' N9 lots will tie subdivided and sold and runoff wiil'tie treatetl in, an engineered stormwater control fecilitys Qeed ' A restrictions and protective covenants are necessarylo,ensure that the:developrrien6maintains a "bui Jpons areaQbnsistent with�the design critenaiused.to.size the stormwater control facility. 1 Tucker Land Holdings LLC c/q D via d Tucker, . acknowledge, affirm and agree by my signature bel l at I will cause the folfowmg deed;restn ons and —covenants to be recorded prior to the sale of any lot: 1. The following covenants are intended to ensure on oing compliance with State Stormwater Management Permit Number 5 15 D aD , as issued by the Division of Water Quality under the stormwater Management Regu at ons. 2. The State of North Carolina is made a beneficiary of these covenants to the extent necessary to maintain compliance with the stormwater management permit. 3. These covenants are to run with the land and be binding on all persons and parties claiming under them. 4. The covenants pertaining to stormwater may not be altered or rescinded without the express written consent of the State of North Carolina, Division of Water Quality. 5. Q Alteration of the drainage as shown on the approved plan may not take place without the concurrence of the Division of Water Quality. OR, if the proposed built -upon areas per lot will vary, please REPLACE #6 above with the following: 6. The maximum built -upon area per lot, in square feet, is as listed below: .Lot # BUA Lot # . BUA Lot # .BUA Lot # BUA Each lot will maintain a 30" foot wide vegetated buffer between all impervious areas and surface waters. "50 foot for projects located in the 20 coastal counties. 6. All runoff from,the built -upon areas on the lot must drain into the permitted system. This may be accomplished through a variety of means including roof drain gutters which drain to the street, grading the lot to drain toward the street, or grading perimeter.swafes to collect the lot runoff and directing them into a component of the stormwater collection system. Lots that will naturally drain into the system are not required to provide these additional measures. Form DRPC-3 Rcv.2 05Nov2009 Page 1 of 2 State of IVl`3k do hereby certify tl before me this the the due execution My Date: . ). i eJW _.. a Notary Public in the 11_ personally appeared day of 20j5 and acknowledge the foregoing instrument. Witness my hand and official seal, �4!!%A;. n'`C: SEAL 0 FormDRPC-3 Rev.2 05Nov2009 Page 2of2 -5k/3/30,20 -E�5S'tcED APR. Zj� z ai5 Midland, NC Cabarrus County REC��\/C� / Matthew G. Velkovich, Summit Land Services RECEIVED V L O ?s 1�O e.Ii 23 2015 =, Ali Saddlebrook Phase 2 ©F'MA o �.. Vol, 1p DENR-LANDQUAII--- k 2 � �_ (P. %_ idland, NC Cabarrus County STORMWATERPERM nDENR LS � MW& G. Velkovich, Summit Land Services Type of Only complete application paffliges will be accepted and reviewed. A complete package includes all of the items in the checklist below. Add any comments, and indicate the page or plan sheet number where the following information can be found. Please indicate that you have provided the following required information by initialing in the space provided next to each item. ( Part I: Submittal Checklist I Item Notes I Comments Initials 1 Original and one copy of this application form (all worksheets) and the permit application in package ph application fee. For applications submitted to the DEMLR regular permitting program, the fee is $505 payable to NCDENR. For Express Review, click on the link below for information and fee schedule. Contact the appropriate regional office Express Review Coordinator to schedule the required pre- annlicatinn meetinn. Click here for Express Permitting info 2 A USGS map identifying the site location. If the receiving stream is reported SW report ph as class SA or the receiving stream drains to and is within 112 mile of SA waters, then include the 1/2 mile radius on the map. 3 A copy of the most current property deed. ph 4 Two copies of additional calculations (as needed). Sealed, signed and dated. attached ph 5 Two sets of sealed, signed, & dated full-sized plans of the entire site at a attached ph readable scale, including: a. Project name, engineer and firm, revision number and dates. Cover ph b. Location map wth street names and SR numbers, legend, north arrow, C1.0 ph scale. c. Dimensioned property/project boundary with bearings & distances. C1.0 ph d. The boundaries of all surface waters, regulatory flood zones, and C2.0 ph protected riparian buffers or a note on the plans that none exist. e. The boundaries of all vegetated or protected riparian buffers. n/a ph f. Site layout showing all built -upon areas, drainage features, stormwater C3.1-C3.4 ph collection systems (inlets, outlets, swales, pipe elevations, slopes and diameters), and SCMs at ultimate build -out. g. Existing contours, proposed contours, spot elevations, and finished floor C3.1-C3.4 ph elevations. h. Existing drainage (including off -site), drainage easements, pipe sizes, C14.1, SW Report ph runoff calculations. i. Drainage area boundaries (included in the main set of plans, not as a C14.1, SW Report ph separate document). I. Existing and proposed maintenance access routes, utility easements, C2.1-C2.4 ph drainage easements, public rights -of -way etc. k. A construction sequence that shows how the SCMs will be protected C4.1, C4.5, C4.9 ph from sediment until the entire drainage area is stabilized. 6 Two sets of sealed, signed, & dated full-sized plan details of each SCM (or C8.1-C8.3 ph typical if appropriate) in both plan view and cross-section at a scale of V _ 30' or larger, including: a. Dimensions, side slopes, length to width ratios and elevations with a C8.1-C8.3 ph benchmark for clean -out if appropriate. b. All applicable conveyance devices, including: bypass structure, C8.1-C8.3 ph pretreatment area, flow distribution device, underdrains, outlet device, outlet dissipater and level spreader. c. A table of elevations, incremental volumes and accumulated volumes (if SW Report ph applicable). d. Specifications for applicable materials, such as planting media, C8.1-C8.3 ph aggregate, sod, undercrains, outlet devices, etc. STORM-EZ 2/19/2015 Version 1.4 Application Page 1 of 4 Midland, NC Cabarrus County Matthew G. Velkovich, Summit Land Services 7 Two sealed, signed, & dated planting plans for each SCM (or typical) at a n/a ph scale of 1" = 20' or larger, as applicable, including: a. The locations of each species and a planting detail. n/a ph b. A table summarizing the size, spacing and total quantity of each plant n/a ph species that should be used. c. The source nursery for the plants. n/a ph d. A one-time fertilizer specification to establish plants if necessary. n/a ph 8 A soils report based on field evaluation indicating the SHWT elevations n/a ph within the footprints of the proposed SCM(s). Provide a map of the boring locations with the existing elevations and boring logs. For infiltration SCMs, the report shall include the soil type, infiltration rate and method for determining the infiltration rate. Soils information shall be signed and sealed 9 A copy of the signed and notarized operation and maintenance (O & M) to be submitted after intial ph agreement. review 10 A copy of the proposed deed restrictions protecting the SCMs and limiting to be submitted after intial ph the built -upon area so that it does not exceed the capacity of the SCM(s) or review the high density threshold (as applicable). NCDENR Deed Restriction Forms 11 For corporations and limited liability corporations (LLC): Documentation from n/a ph the NC Secretary of State or other official documentation, which supports the titles and positions held by the persons listed in the Contact Information section. The corporation or LLC must be listed as an active corporation in good standing with the NC Secretary of Stale, otherwise the application will he rehirned. NC Dept. of the Secretary of State 12 A copy of the lease agreement or pending sales agreement if applicable. n/a ph STORM-EZ 2/19/2015 Version 1.4 Application Page 2 of 4 Midland, INC Cabarrus County Matthew G. Velkovich, Summit Land Services Part If: General Project and Applicant Information Project Name: Saddlebrook Phase 2 Date: 4-Dec-14 Project Street Address: Let: 35.24 City: Midiand Zip: 28107 Long: -80.51 Directions to Project: Located off Hwy. 601 appr..5 miles south of intersection of Hwy. 27 and County: Cabarrus (from nearest intersection) Hwy. 601 NON -COASTAL Project Applicant: I Tucker Land Holdings, LLC (Identify the corporation, organization, property owner, designated government official, etc. which owns the prolect.) Owner / Signing Offical's Name: I B & C Phone: 704-287-1602 Fax: Email: I tones Carolina-develo ment.com Status of applicant: Owner River Basin: Yadkin Receiving Stream(,): Muddy Creek Stream Class(es): C Surface Water Area (ac): 0 Coastal wetland area (ac): Total property area (ac): 46.94 Total project area (ac): Goals/characteristics: P!q Volume Matching (LID) Low Density High Density Briefly summarize how the stonnwater runoff will be treated: Drains to an offsitetormwaler system Within 575' offSaltwater waater ORW Within 5 miles of a public airport Part III: Permit Information I Status of construction: Not Started Other permits needed:r YES ISedimentation & erosion control 404 Permit / 401 Certification NO CAMA Major Permit Isolated Wetlands Permit NO Threatened & Endangered Species ��NONPDES Industrial Stormwater Permit If an application for this project has been previously returned, provide the original project number and previous name of the project: Provide the permit type, number and issue date for any permits that have already been If claiming vested rights, then identify (and attach) the supporting documents and approval dates: �Approval of asite-specific development Plan or PUD Approval date: permit Valid building permit Issue date: Other Date: Not Started Point of Contact: Phone number:0 STORM-EZ 2/18/2015 Version 1.4 Application Page 3 of 4 Midland, NC Cabarrus County Matthew G. Velkovich, Summit Land Services (Optional) Additional Contact Person / Orginization: Signing Official & Title: Street address: City, State, Zip: Phone number(s): Email: Part IV: Additional Contact Information I Scott Twiddy Agent 2627 Brekonridge Centre Drive Monroe, NC 28110 803-389-3387 stwiddy(cDc rolina-develoomenLwm (Note: Person/Organization noted above may be contacted for additional project Information if applicant cannot be reached.) Part V: Consultant Information I Complete this section if you wish to designate authority to another Individual or firm so that they may provide Information on your behalf for this project (such as addressing requests for additional Information). Consultant: Firm: Street address: City, State, Zip: Phone number(s): Email: Matthew G. Velkovich Summit Land Services PO Box 7442 Charlotte, NC 28241 803-448-4452 mvel kovichtdsu mm it-comoa nies.com Part VI: Property Owner I Applicant Certification I I, (the Owner & Applicant listed above), aytol 7(,--k(✓ , certify that the information included on this permit applicant form is, to the best of my knowledge, correct and that the project will be constructed in conformance with the approved plans, that the required deed restrictusion and protective covenants will be recorded, and that the proposed project complies with the requirements of the applicable state slormwaler rules and requirements. Witness my hand and official seal, _ K OUN "I 'tip; • Oj A R y •', Pueocl .2 My commission expires 1"-I I q I V v I 1 STORM-EZ 2/18/2015 Version 1.4 Application Page 4 of 4 � rt� \ �:- Y"\ Saddlebrook Phase 2 ©�A Midland, NC Cabarrus County �i t Yadkin River Basin NCDENR RAINFALL & CALCULATION DATA Project County: Cabarrus Project City: Midland Rainfall Source: Charlotte Loaded Rainfall: Charlotte Design Storm: 1- r, 24-hr Discrete SCS Method, Calculation Method Pre -Post (Minimum Design Storm = P90 for non -SA, 1-yr, 24-hr for SA) Storm Event Depth (inches) First Flush / W QV 1.00 P90 1.40 P95 1.86 iiiiiiiii�L rJ24?h-rJ= 2.78 2-yr, 24-hr 3.36 10-yr, 24-hr 4.89 25-yr, 24-hr 5.80 50- r, 24-hr 6.53 100- r, 24-hr 7.27 NOTE: Please use the Storm-EZ calculation sheets to document the stormwater design and create the O&M Agreement. Highlighted Storm is Design Storm I PROJECT INFORMATION I Total Property Area 1 37.65 jacres Total Coastal Wetlands Area 1 0.00 lacres Total Surface Water Area 1 0.00 lacres Complete the breakdown of impervious area for the project Basin Information Entire Site Receiving Stream name Muddy Creek Stream Class C Stream Index Number 12-94- 0.5 Total Drainage Area 1,640,087 On -Site Drainage Area sf 1,640,087 Offsite Drainage Area sf 0 Proposed Impervious Area sf 1,146,025 % Impervious Area total 70% Impervious Surface Area Entire Site On -Site Buildings/Lots sf 511,200 On -Site Streets sf 162,426 On -Site Parkin sf 0 On -Site Sidewalks sf 68.420 Other On -Site sf 403,979 Future sf Off -site s Existin BUA sf Total 1, 146,025 Total Impervious Area 26.31 acres Project % impervious area 70% Use Worksheet Data? I Yes Data in italics is derived from application forms and land use data worksheets and cannot be changed by user. STORM-EZ 2/19/2015 Version 1.4 Project Data Page 1 of 1 Saddlebrook Phase 2 A Midland, NC Cabarrus County LTA Yadkin River Basin NCDENR Drainage Area # F-1� of �—t 1 I I PRE -DEVELOPMENT LAND USE CALCULATIONS Pre -Development Land U Note: Enter BUA Dmining to Permeable Pdvemenl Below User Defined Drainage ;a: Area HSG Land -use CN s acres % B Pasture or Open Space 61 343 308 7.86 20.937 B Woods 55 t2887B1 29.77 7907% Subtotal: 1.640.DB7 37.65 Existing Permeable Isavemont ?Infiltration): SCM # Description, 100 Existing Green Roofs: scm HSG Pavement Aroa AtldiHonal BUA In6ltraltlo oRate Gravel Vold space Gotta) Depth Orn, Dla. Orifice Haight BUA Y. Has synthetic Llner7 D.S. BMP (5i) (9i1 (lrvbr) (%) (0) (in) lint Area Ds SCM # I Notes ern.W I Frem Lend Use Tablet: 184008] 37.85 acres Permeable Pavement - Ae0i0onal BUA: 0 0 00 sum Grsen Roots: 0 0.00 ewes Pillion, unacevionex N 083W WerearWil: acres reservee stel Werearall, 71 0.00 acne Total Site Aroa: 1 1640087 37.65 acres Pre -Development SCMs: SCM # SCM T e 200 WO Vdume Provides Dralne Area Downstream SCM Im . n (So s HSG 0 116400117 Design Storm Runoff Fate Summary: Rainfall Volume= IN 67 acrainUes = 379,953 cf RunoffReducdon Components: Natural Infiltration 8 ET = .98,36 ecreinchas • .357,042 cf Disconnected Impervious Surfaces= 000 ecreioohes • 0 cf SUM Infiltration= 000 acnnwfros • 0 d Permeable Pavement Infiltration = 0.00 acre -inches • 0 of Green Roof ET = 0,00 acre trahes • 0 ct Post Filtration Discharge = 0.00 acme nches • 0 cf Total Runoff Reduction = -99.36 acre-inchm -357,042 cf SCM Treatment. Treated SCM Outflow= 000 acreJnches 0 cf Untreated Surface Runoff= 6.31 acrenchm= 22912 cf The Pre-Devolopment project area contains 0 sf of built upon area, resulting in an overall density of 0%. STORM-EZ 2/192015 Version 1.4 Pre.Development Page 1 of 1 Saddlobrook Phase 2 ®� A Mldland,NC CabanusCounty L.1 Yadkin River Basin NCDENR Dmina9e Area# 1 of 1 ' POST -DEVELOPMENT LAND USE CALCULATIONS Permeallle Pavement. InOhrtllon Oul Ne. Oa'.. OWeld Gown- Pcwmam Me MtlBbmI VVA UPW a,.Gnwl y,Clr.kn OCt HSG Pvml Tyw Rtl• M F 9yMMtk Llmri 01a. Ne1BM sSCM SCY cMCF grkn CMCY an (a an pnw) rwkr) lx) ml c 1 m) 0.ad I 1 000 INo rlriln.M nrun aru�ul Lm Me Yu hnplLMI # of Lou % Wmtll Lot (; Opan Spaw/Lor IN An Lot Sin, lsq s9 I.On.120 33s1 21) 3,000 Ss.b 0 MI3 4813.1 Remalnin Land Use: Are. NBO LmbU- CH % B rnps P as S.98n 13.63 3351% B ow S,. 9Aaruyetl Open byte.) 61.0 65112 1.50 30% B lub(.uas,..M Open BPtlel 625 1.025.120 33.53 62301L Peet.W Peremenl I BUA: NIA 0 0ad 0.00% GI..n Roots WA 0 0.00 00% SubToul: 1640067 3705 IDG.Oo13 LaM E-I .w PMlaI Emfv ,f,om Volum Cakulalbru: .1. Surface Welen a Narvco.aUlWaeM.: 0 000 Co•Y.I WtlaMa: 0 000 TT•I SM M.: 1 eb 0S7 1 37.35 Re#M.mi.l Let Data Summsry: wooas•O.f Open Sp.— • Canto at MlYrviou. • 596100.f Rainfall Volume IWID acr.Aclue • 379,963 cl RunoRRoduction Components: Natural lnfdablbn B ET= Jib .cnwlau. -124,740 d Disconnected Impervious Surfaces = am .c e.YNM. a a SCM InNeatbe= -7W scr• n • -27,d55 a Permeado PavomonllnlJ0ati0n= 000 an.-ycbw 0 d Groon Roo/ET= 000 .PeLIMea 0 d Post Filonlron Dischar2. = 000 .Pave0n 0 _ d to'Til'RunoA (luCa on • .u.aa .c,..bcH.. c/ STORMfi 2,19R015 VmYM 14 P. Dewbpmml Ppe 1 of 2 Saddk Phase ®�MlEland,NC CabaruaCount' � Yadkin River Basin NCDENR Drainage Area# 1 of 1 Treated SCM Oudlow = -5d.ld oei,dna •-206,174 BMreated Surface Runoff • 5.95 scm-I.N. 21,655 CI Pre-Deanorenent Runoff= 6,31 a.-- 22,912 Cf Defenn.9 = 437 ae'4 nar • .1,327 Cf The Post-D—lupmant project man contains 11411025 at of bulb upon ama, mauXlnO in an *,mmll dmaity of 69.8e%. Slr W -. .. 2MMI5 YemYpn 14 - Pm Derolapmenl Pya 2 of 2 Satld. NC ok Phase 2 /� Midland. NC Cabarrua County ®Nc/,.,,1 Yadkin River Basin N5§f §— DrainageAroaa 1 of 1 PROPOSED SIP* a STRUCTURAL RUNOFF VOLUME CONTROLS Enter only runoff volume below that will be infiltrated or drawn down over 2 to 5 days. Additional volume provided in devices should not be entered In this worle meet. Drawdown time requirement applies to all storm events. OHmelmllm`MaB al At"Mad flews Tow Pw rm P•M]u• %dTaW %NTOY 6pge Pon. saw. weal YrlbeMa f0aiY1 T. %WaCY KY • • 4npvNYe M1rw.0 Yearns NNmeCa you— VWnI• ET OmNm cal Mime t Namslla' bn TYMOI Dmks XSa I.Ib,a]s IN.Po] Mee Area Icn * to Icn lei tort tort Ilbry >Op BWA wsl nebmon B l la ea aue lerf areI%59 'alsoIeleW I5G5'l a +s+s:s loex W ConaVucW weWrtl B JI]90) IG]I] ]qf a1{ 515f] 7J]« 1])e II.Xd a Sella III% I.. elepn apcs soles IWµdMY 11<o. LImpMwe a'se snMN caymedlo loloii a11d41 Mnp-rar eam .v,awad n 1101. al are aarvV.. opn o'e". ass. Rn'aa a- D.algn S(cem Rurwlf RN Summary: Ralnfall Volume• lam easeluv 3]9,95] cf Reduce R*tlucdmr Componard. Natural Mooradian 6 ET= a ye ed.:rr5.e -12ePeP d Dacannecled lmpmvrour Anse = ada 0 sl SCM lnfilaallm= —7W8—nn• PormoaWe Pavement infiltration= aa0•a.+nmea• 0 or Green Roof ET= ow eoe.ocme • o d Pool Flow. Dlc ,,, • a no —'re. • a d _ Total RunaR Radudlon• ♦1JS enemonm • -152,,95 c SCM Traarmsnb Treated SCM OvMow= ease eaeaa - -2gs, 114 cr Un4eafed Surface Runoff= A. aaeeade • 21.W5 d Pre-DevebVmenl Runoff ea—ar..- 22,912 d DWamoce = air —char . -1,322 d "BASIC TREATMENT MET - Ts Po•rLe•eb[mmY pekwA.rea.1 legs e1W eirrTT.rea, rerOV In an.WmMera.MX wernow: Near: I,, rears, a a— li as eaden, sbMbn MNe. Pro .W aeYards. or MYb.b ....e nows Cu t ubq ubY. TM rows ukWYW4 YmM N PnwM FMOYM mever apeftow, ]TORMF2 ilYA15 ,kl 1 L ebrmvnbr Lon4de Pate I al l SatlPhase nt Midland, q NC NC Cab+berru+County Y.dMn Rlwr a++ln Dram,, Area# 1 of 1 ®� NCDENR FATE OF RAINFALL S+l+ct loan: 1 Year BASIC TREATMENT SCALE Compliance stood - I Year Storn - Rainfall Depth 2.78 inches e.elc uw(men< mrcennle VOLUME MATCHING SCALE 7 Year Storin- Rainfall Death — 2.78 Inch t}, whim.M.ohl. nwmnM FATE OF RAINFALL GRAPHS aua S ox � o Pre Development Fates Post Development Fates .a 3 Ina e (aa B KnI w munrxbe.ee n.avmn a.eem BmA mOvae .wn Rimlan anb..on •pq.r e Inllb,rion Ey BMA l )e 55 cl +0.m+.NePmmen(InNb1 •OivnnnMMlmCeMou ln"llnou.OWan tl wv..r.awm.. e,een.}15BSn m aurae - mnn owrmoarle. rem emA.bn wrr.naamm.e+.eon. velva w r •e ..on •an.r e lnitl arM gOmp�etl acme . nemm n rMn-Otl • nnen m bulNlNnbn-Btl +4raen Rmr(rpglrmPr,rbn-On •InIY{e.tbn qE D-BS)yja TM'i.401 Olen'n RA.rMIr Wrle EIepYY Ne nWmbpk praceeue b unlG. r.ml•1 wlumeeero uEjclM E+.M on Yn mmGwti>I. W 4M uu, nll lyye. eM ebrmvnbrmnWle enkM Eybe uur. iMc1uN ero OeegreE b OImYy IM ebrmuabr a krm xNcn Ilbeb+be W ryas b tlw nymbp'cc5de'^I'Cn neJrirwn vEenlnlbn eM wrbua eWmw,br marepem•nl eY•bpee. STORMFZ L14I3015 V.rzon 1.4 a.i,W F.b Garl Pace 1 N 1 Saddlebrook Phase 2 Midland, NC Cabarrus County ® F ( � Yadkin River Basin NCDENR Drainage Area # 1 of 1 ADDITIONAL CALCULATIONS TIME OF CONCENTRATION CALCULATIONS: Pre•Development Sheet Flow: Sheet Flow: Shallow Flow: Shallow Flow: Channel Flow: Channel Flow Pre -development T°= 32.22 min Post Development Sheet Flow' Sheet Flow: Shallow Flow: Shallow Flow: Channel Flow: Channel Flow: Post -development T. 21.71 min fM�°�m�m 5mmmasl ADJUSTED CURVE NUMBER CALCULATIONS: Analysis Area = 37.65 Acres (0.059 sq. miles) Pre -Development Post Development PEAK FLOW CALCULATIONS: Analysis Area = 37.65 Acres (0.059 sq. miles) F.F. P90 P95 1-Yr 2-Yr 10-Yr 25-Yr 50-Yr 100•Yr Pre -Development Q• (in) q„ (csm/in) Q (cfs) Post Development Q• (in) q„ (csm/in) Q (cfs) **Note: To decrease Post -development peek flows - increase storage volume being drawdown or infllbated or lengthen post. development time of concentration. See LID HELP for more information. Length (ft) Slope (Pofl) Surface Cover T�(hrs) 168 0.015 Grass 0.39 796 0.023 Unpaved 0.09 Length (k) Slope (H/tt) n-value HOW rea (kr) Wetted Perimeter (k) T� (hrs) 680 0.016 0.05 47.0 50.0 0.05 Length (ft) Slope (k/k) Surface Cover T�(hrs) 190 0037 Grass 0.30 Length (ft) Slope (tuft) n-value Wetted Perimeter (k) T� (hrs) 1957 0.005 0.013 9.6 L9 0.06 F.F. P90 P95 1-Yr 2-Yr 10-Vr 25-Yr 50•Vr 100-Yr Rainfall in = 1.00 1.40 1.86 2.78 3.3fi 4.89 5.80 6.53 7.27 Q•„ = 0.00 0.00 0.01 0.17 0.3a 1.00 L50 t.94 2.43 CN,d = 67 59 56 56 56 56 56 56 56 F.F. P90 P95 1-Yr 2-Yr 10•Yr 25-Yr 50-Yr 100-Yr Rainfall in = 1,00 t40 1.86 2.78 3.36 4.89 5.80 6.53 7.27 Q'„ = 0.00 0.00 0.00 0.16 0,63 t.93 274 3.40 4.08 CN,a = 67 59 52 56 64 70 71 72 72 0.00 0.00 0.01 0.17 0.34 1,00 1.50 1.94 2.43 189.57 189.57 t89.57 189.57 229.77 343.43 343.43 343.43 343.43 0.00 0.00 0.13 1.87 4.82 20.28 30.35 38.29 49.00 0.00 0.00 0,00 O.tfi 0.63 1.93 2.74 3.40 4.08 219.77 219.77 219.77 219.77 377.70 510.22 570.22 570.22 510.22 0.00 0.00 0.00 2.04 13.89 58.08 82.29 102.06 122.36 N/A N/A -100.0% 9.1% 203.1% 186.4% 171.1% 159.7% 149.7% STORM-EZ 2/19/2015 Version 1.4 Peak Flow Calcs Page 1 of 1 Operation & Maintenance Agreement Saddlebrook Phase 2 Midland, INC Cabarrus County Prepared By: Matthew G. Velkovich, Summit Land Services Maintenance records shall be kept on the following BMP(s). This maintenance record shall be kept in a log in a known set locatlo Any deficient BMP elements noted in the inspection will be corrected, repaired, or replaced immediately. These deficiencies can affect the integrity of structures, safety of the public, and the pollutant removal efficiency of the BMP(s). The BMP(s) on this project include (check all that apply & Bioretention Cell Quantity: Dry Detention Basin Quantity: Grassed Swale Quantity: Green Roof Quantity: Infiltration Basin Quantity: Infiltration Trench Quantity: Level SpreaderNFS Quantity: Permeable Pavement Quantity: Proprietary System Quantity: Rainwater Harvesting Quantity: Sand Filter Quantity: Stormwater Wetland Quantity: Wet Detention Basin Quantity: Disconnected Impervious Area Present: Soil Amendments Present: O&M tables Location(s): Location(s): Location(s): Location(s): Location(s): Location(s): Location(s): Location(s): I acknowledge and agree by my signature below that I am responsible for the performance of the maintenance procedures listed for each BMP above, and attached O&M tables. I agree to notify NCDENR of any problems with the system or prior to any changes to the system or responsible party. Responsible Party: Title & Organization: Street address: City, state, zip: Phone number(s): Email: Hold 2627 Monroe, INC 28110 704-287-1602 Date: S a Notary Public for the State of County of \ k , do hearby personally appeared before me this day of _ acknowledge the due execution of the Operations and Maintenance Agreement . Witness my hand and official seal, My commission expires 14 I 30 I -I —T and STORM-EZ 1 2/18/2015 Version 1.4 O&M Manual Page 1 of 6 i�: Yip, i? r J � � !, i .' / h �% :'��l .:• �, '�J I Stormwater Wetland Maintenance Requirements I Important maintenance procedures: Immediately following construction of the stormwater wetland, bi-weekly inspections will be conducted and wetland plants will be watered bi-weekly until vegetation becomes established (commonly six weeks). No portion of the stormwater wetland will be fertilized after the first initial fertilization that is required to establish the wetland plants. - Stable groundcover will be maintained in the drainage area to reduce the sediment load to the wetland. - Once a year, a dam safety expert should inspect the embankment. After the stormwater wetland is established, it shall be inspected monthly and within 24 hours after every storm event greater than 1.0 inches (or 1.5 inches if in a Coastal County). Records of operation and maintenance will be kept in a known set location and will be available upon request. Inspection activities shall be performed as follows. Any problems that are found shall be repaired immediately. BMP element: Potentialproblem: How I will remediate theproblem: Entire BMP Trash/debris is present. Remove the trash/debris. The perimeter of the BMP Areas of bare soil and/or Regrade the soil if necessary to remove the gully, and then plant a erosive gullies have formed, ground cover and water until it is established. Provide lime and a one- time fertilizer application. Vegetation is too short or too Maintain vegetation at a height of approximately six inches. long. Forebay Sediment has accumulated in Search for the source of the sediment and remedy the problem if the forebay to a depth that possible. Remove the sediment and dispose of it in a location where it inhibits the forebay from will not cause impacts to streams or the BMP. Erosion has occurred. Provide additional erosion protection such as reinforced turf matting or riprap if needed to prevent future erosion problems. Weeds are present. Remove the weeds, preferably by hand. If a pesticide is used, wipe it on the plants rather than spraying. The inlet device The pipe is clogged. Unclog the pipe. Dispose of the sediment off -site. The pipe is cracked or Replace the pipe. otherwise damaged. Erosion is occurring in the Regrade the swale if necessary to smooth it over and provide erosion swale. control devices such as reinforced turf matting or riprap to avoid future problems with erosion. Stone verge is clogged or Remove sediment and replace with clean stone. covered in sediment (if applicable). STORM-EZ 2/16/2015 version 1.4 O&M Manual Page 2 of 6 I Stormwater Wetland Maintenance Requirements (Continued) I Deep pool, shallow water Algal growth covers over 50% Consult a professional to remove and control the algal growth. and shallow land areas of the deep pool and shallow water areas. Cattails, phragmites or other Remove invasives by physical removal or by wiping them with invasive plants cover 50% of pesticide (do not spray) — consult a professional. the deep pool and shallow Shallow land remains flooded Unclog the outlet device immediately. more than 5 days after a storm event. Plants are dead, diseased or Determine the source of the problem: soils, hydrology, disease, etc. dying. Remedy the problem and replace plants. Provide a one-time fertilizer a lication to establish the ground cover if necessary. Best professional practices Prune according to best professional practices. show that pruning is needed to maintain optimal plant Sediment has accumulated Search for the source of the sediment and remedy the problem if and reduced the depth to 75% possible. Remove the sediment and dispose of it in a location where it of the original design depth of will not cause impacts to streams or the BMP. Embankment A tree has started to grow on Consult a dam safety specialist to remove the tree. the embankment. An annual inspection by Make all needed repairs. appropriate professional shows that the embankment Evidence of muskrat or Consult a professional to remove muskrats or beavers. beaver activity is present. Micropool Sediment has accumulated Search for the source of the sediment and remedy the problem if and reduced the depth to 75% possible. Remove the sediment and dispose of it in a location where it of the original design depth. will not cause impacts to streams or the BMP. The outlet device Clogging has occurred. Clean out the outlet device. Dispose of the sediment off -site. The outlet device is damaged Repair or replace the outlet device. The receiving water Erosion or other signs of Contact the local NC Department of Environment and Natural damage have occurred at the Resources Regional Office. outlet. STORM-EZ 2/16/2015 Version 1.4 O&M Manual Page 3 of 6 I Wet Detention Pond Maintenance Requirements I The wet detention basin system is defined as the wet detention basin, pretreatment including forebays and the vegetated filter if one is provided. Important maintenance procedures: Immediately after the wet detention basin is established, the plants on the vegetated shelf and perimeter of the basin should be watered twice weekly if needed, until the plants become established (commonly six weeks). No portion of the wet detention pond should be fertilized after the first initial fertilization that is required to establish the plants on the vegetated shelf. Stable groundcover should be maintained in the drainage area to reduce the sediment load to the wet detention basin. If the basin must be drained for an emergency or to perform maintenance, the flushing of sediment through the emergency drain should be minimized to the maximum extent practical. Once a year, a dam safety expert should inspect the embankment. After the wet detention pond is established, it should be inspected once a month and within 24 hours after every storm event greater than 1.0 inches (or 1.5 inches if in a Coastal County). Records of operation and maintenance should be kept in a known set location and must be available upon request. Inspection activities shall be performed as follows. Any problems that are found shall be repaired immediately. BMP element: Potential problem: How I will remediate the problem: The entire BMP Trash/debris is present. Remove the trash/debris. The perimeter of the BMP Areas of bare soil and/or Regrade the soil if necessary to remove the gully, and then plant a erosive gullies have formed. ground cover and water until it is established. Provide lime and a one- time fertilizer application. Vegetation is too short or too Maintain vegetation at a height of approximately six inches. long. The inlet device The pipe is clogged. Unclog the pipe. Dispose of the sediment off -site. The pipe is cracked or Replace the pipe. otherwise damaged. Erosion is occurring in the Regrade the swale if necessary to smooth it over and provide erosion swale. control devices such as reinforced turf matting or riprap to avoid future roblems with erosion. Stone verge is clogged or Remove sediment and replace with clean stone. covered in sediment (if applicable). The forebay Sediment has accumulated to Search for the source of the sediment and remedy the problem if a depth greater than the possible. Remove the sediment and dispose of it in a location where it original design depth for will not cause impacts to streams or the BMP. sediment storage. Erosion has occurred. Provide additional erosion protection such as reinforced turf matting or riprap if needed to prevent future erosion problems. Weeds are present. Remove the weeds, preferably by hand. If pesticide is used, wipe it on the plants rather than spraying. The vegetated shelf Best professional practices Prune according to best professional practices show that pruning is needed to maintain optimal plant health. Plants are dead, diseased or Determine the source of the problem: soils, hydrology, disease, etc. dying. Remedy the problem and replace plants. Provide a one-time fertilizer application to establish the ground cover if a soil test indicates it is ,necessary. Weeds are present. Remove the weeds, preferably by hand. If pesticide is used, wipe it on the plants rather than spraying. STORM-EZ 2/16/2015 Version 1.4 O&M Manual Page 4 of 6 I Wet Detention Pond Maintenance Requirements (Continued) I The main treatment area Sediment has accumulated to Search for the source of the sediment and remedy the problem if a depth greater than the possible. Remove the sediment and dispose of it in a location where it original design sediment will not cause impacts to streams or the BMP. storage depth. Algal growth covers over 50% Consult a professional to remove and control the algal growth. of the area. Cattails, phragmites or other Remove the plants by wiping them with pesticide (do not spray). invasive plants cover 50% of the basin surface. The embankment Shrubs have started to grow Remove shrubs immediately. on the embankment. Evidence of muskrat or Use traps to remove muskrats and consult a professional to remove beaver activity is present. beavers. A tree has started to grow on Consult a dam safety specialist to remove the tree. the embankment. An annual inspection by an Make all needed repairs. appropriate professional shows that the embankment needs repair. if applicable) The outlet device Clogging has occurred. Clean out the outlet device. Dispose of the sediment off -site. The outlet device is damaged Repair or replace the outlet device. The receiving water Erosion or other signs of Contact the local NC Department of Environment and Natural damage have occurred at the Resources Regional Office. outlet. The measuring device used to determine the sediment elevation shall be such that it will give an accurate depth reading and not readily penetrate into accumulated sediments. STORM-EZ 2/16/2015 Version 1.4 O&M Manual Page 5 of 6 I Wet Detention Pond Design Summary 1 WET POND ID FOREBAY MAIN POND BMP A Normal Pool El. 517.5 Normal Pool El. I Temporary Pool El: 523.5 Temporary Pool EI:Pretreatment other NoClean out depth: 513.5 Clean out depth:than forebay? Sediment Storage El: 513.5 Sediment Storage El:Has Vag. Filter.. Yes Bottom El: 514.5 Bottom El: STORM-EZ 2/16/2015 Version 1.4 O&M Manual Page 6 of 6