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HomeMy WebLinkAbout20080282 Ver 1_More Info Received_20080211 Leer of T~ansrn<t~te[ TQ: Kim Garvey, US Army Corps of Engineers From: Kristen Rose ~~' Dates: February 8, 2008 Re: Myrtle Landing Multi family Residential Development, Wilmington In response to your questions and request for further information on this project: The wetland mitigation proposed for this project will be in the form of protection of the Pocosin located on the southern parcel owned by Biltmark Builders. A New Hanover County Conservation Overlay District requires protection of a portion of the Pocosin using one of four methods outlined on page 7 of the guidance document (see attached). Biltmark Builders will be preserving the Pocosin by either dedicating it to the county, or turning it over to the homeowner's association. The final decision on the method of preservation has not yet been decided. 2. The ditch plug detail is shown on Sheet 15. The purpose of the plugs is to prevent discharge to jurisdictional resources during construction of the stormwater treatment measures. 3. Please find attached the requested cross-sections showing the utility crossing and turn-around on the Myrtle Landing Multi family Residential Development project. I have highlighted the resources and proposed impacts on Sheets 7 & 8 to ease your review. Impact #1 involves the crossing of a jurisdictional wetland ditch for utility line installation. Impact #2 involves crossing of a jurisdictional wetland ditch for a vehicle turn-around. If you have any other questions or need further information, please let me know. ~ ~~~~~~ F~ D ~ ~ ~ zoos DENR- YVATcr~i ~:~~~Ht :,~. AND STORatWATEt~ ~;- ..,tom r ~t..,;~~/.t,. gieaf'Fine aid Turkey rJak ~!ondland ~ /~~~`; a ti ' Urban and []~«e1op++d Land HEATHChIFF-R~--_ --- -----._.-_...----------.__.._-.... St.Ir,~C~<inn11 ~.1nd _, _ ~^~ 'r1 u L~U m ~~ m i~ .~-i c~°-.y axy ~~~~ j-~ ;"' f~RIVATE ----- ------,.-._.._.,,~ , -- ~.-_. Longleaf Pine and Turkey 07k Y-+©odland I vamp l=orr~l; wand Deyelaped Land Poer~sin _~ f i __. and Oevelpped Land , Pine F63f°_ q~ :. , . '1. f ~• Pine Forest Pocosin ~ t'ine Plantation --.~__ ~~,.,.- Urban a~ad:0e~elonexS Land ~~----~~, J - Urban and beweloped-C~nt! - _ -- ~~ - ~_ I'~~anning Department: New Hanover County, NC Page S of 17 {A) Any operation or use which emits smoke, dust, or creates glare or other visual hazards is expressly prohibited. {All of Sections 59.2 and 59.3 were originally adopted i 0/4/7 f.. ~ ~a~~e~ `'.~:1r`ocas,e7•ustitin C7rvem-Ray Elistrict 59.4-1: Purpose -The purpose of the Conservation Overlay District (COD) for conservation resawces is to protect important environmental and cultural resources within the County. Protection of these resources is necessary to maintain the County's diverse anal ecologically important natural systems; to preserve the County's estuarine systems important for finfishing and shellfishing; fio pmvide open space; and to retain the Goimty's archaeological and historical heritage. These COD's shall be in addition to any other zoning districts where applied so that any parcel of land Iying in a COD may $lso lie in one or more of the zoning districts provided for by this Ordinance. The development of all uses permitted by right or by special use permit in the underlying district, if any, shall be subject to the requirements of both the COD and the underlying district, if any. In the event tha# the COD requirements conflict with the underlying district requirements, the requirements ofthe COD shall take precedence. Ifrequirements for aparticular item are not specified in the COD but are specified by'the underlying district, then the requirements of the underlying district shall be followed. 59.4-2: Applicability -The development and improvement of property, including the subdivision of Land, shall be subject to these performance controls if the parcel of record is located wholly or partially within a COD and if conservation resowces, as specified in Section 59.4-3, are associated with ~e parcel on record as of December I, 1984, the effective date of this ordinance. The foIlawing uses, however, are exempted from these controls: (1) The development of one single family home detached stnictwe, one residential duplex, or the location of two or fewer mobile homes an a parcel or lot. (2) Commercial, industrial, office or institutional development involving a land disturbance of less than 1 (one) acre in area. . (3) The development or subdivision of a parcel that meets bath of the following conditions: (A) No part of the development or subdivision shall be Iocated within a distance equal to or Iess than the setback distance (specified in Section 59.4-5) of any conservation resowee or space existing on the parcel or on a contiguous parcel of record. (B} Na part ofthe development or subdivision shall be located an any portion of the parcel that is part of the upper drainage basin for any conservation resource or space on the parcel or within the specified setback on a contiguous parcel ofrecord. 59.4-3: Conservation Resources - If a parcel on record as of December 1, 1984, the effective date of this ordinance, is associated wim any one of the conservation resources having the minimum distinct areas listed below then the parcel shall be subject to the following performance controls. Official maps of and information concerning these resowces shall be maintained by and shall be available for review at the County Planning Department. These maps shall be updated as needed by the County Planning Department and shall serve as the official source by which to determine if a parcel is associated with Conservation Resources. A parcel is considered to be associated with a conservation resource ~f ei r e resource ~s cantame partially or whotl on the parcel or if the resource is located next to a parcel suc~ hit lax a resowce sei~specif ed in Section 59.4-5 exten into the parcel. I} Ecological Resources ~ Y4Tinimum distinct area 1. Swamp forest 2.5 acres 2.1'ocpsin ~ 2.5 sores 3. Savannah 2.5 acres 4. Natural ponds 0.1 acre S. Freshwater marsh 0.1 acre 6. Brackish marsh ..- 0.1 acre Imo' f " ~.4+,~~ k'~anning Department: New Hanover County, NC (2} ArchealogicaUHistorical Resources and Cemeteries na limit 59.44: General Performance Controls for Conservation Space -The following general performance controls for conservation space apply to all uses within a COD that are subject to controls as determined by Section 59.42 and Section 59.4-3.~ (1) Required amounts of Conservation Space (A) Conservation space is defined as that portion of the conservation resource that shall be pzeserved, as determined by this Section.. (B) Conservation space may not be reserved provided the development or subdivision of the parcel meets the condition specified in Section 59.4.2(3)(x). Zf the development or subdivision does not meet the condition specified in Section 59.42(3) (b), then, the development or subdivision shall meet applicable drainage and setback regulations specified in Sections 59.4-4(5) and 59.4-5. Work Table for 13~termining Required Conservation Space Ileveionable Land (C} Conservation space shall not be xequired to be reserved for the following resources unless the total acreage ofminimum distinct areas on the parcel of retard exceeds the following minimum: to One: List in column 2 the acreage of land occupied by each conservation resource named in column 1. If part of the parcel is occupied by more than one resource, list the acreage occupied only by the resource with the highest ranking. Rankings are listed in column 1 in parenthesis next to the resource name. ' Ste Two: Multiply each of the listed acreage in column 2 by factors listed in column 3. Place each answer in column 4. Ste Three: Add the acreage in column 4 to determine total minimum conservation space required. S e Four: Subtract the total minimum conservation space from the total gross parcel to determine the maximum amount of developable land, The total amount of conservation space that shall be reserved shall be equal to or exceed the total minimum conservation space calculated in step three. The total minimum conservation space shall be allocated to and reserved for conservation resource areas in acreage equal to or exceeding the minimum acreage calculated for the resources in column 4. Page b of 17 Conservation space shall be reserved in contiguous blocks or in close proximity to the greatest Planning Department: New Hanover County, NG extent possible in order to prevent the scattering of such space and to increase effectiveness in their management. {2j Transfer of Conservation Space Requirements Between Resource Conservation Axeas Iu order to provide flexibility in site design, the minimum acreage of conservation space required in column 4 for any one conservation resource area may be reduced by any desired amount provided, however, that the minimum conservation space required far a different conservation resource area with an equal or higher ranking is increased by an equal or higher amount. For instance, assume that a parcel within a COD has ten acres of swamp forest and fifteen acres of fresh: marsh. According to the worktable, swamp forest has a conservation factor of .5 and fresh marsh as a conservation of .&. Therefore, at least 5 acres of swamp forest must be reserved as conservation space (10 acres x .5 = 5), and at least twelve acres of fresh marsh must be reserved {15 acres x .8 =12.0 acres). If the developer, however, wishes to develop seven acres of swamp forest, he may transfer iwo acres of the conservation space requirement for swamp forest to the fresh marsh because fresh marsh has a higher importance value (6) than does swamp forest (5). As a result of the transfer, therefore, all fourteen acres of the fresh marsh would be required to be preserved as conservation space while only three acres of swamp forest would be required to be preserved. (3) fmriirovements -Conservation space shall not be cleared ofvegetation, shall not have its natural drainage system significantly altered, and shall not be developed in any manner that would negatively impact the conservation resource, with the following exceptions: (A) Improvements #hat would either protect or enhance the enjoyment of the conservation resource. Such measures not causing significant impact include, but are not limited to, walkways, self-guided trails, protective fences, clocks and boat ramps. (B) Access to other parts of the parcel If a part of the parcel may be developed but is inaccessble due~to the existence of a conservation resource area, a road and/or utilities maybe constructed through the conservation resource area. The road and/or utilities, however, shall be designed to the greatest extent practical to minimiTp impact to the conservation resource. (C}Access to the waterfront. Ifthe entire waterfront along a pazcel is inaccessible due f4 the existence of required conservation space, a boat ramp, dock,or pier may be built for boating facilities in the conservation space, subject to relevant State and Federal permits. The facilities, however, shall be designed to the greatest extent practical to minimize impact to the conservation resource. ' (~) lvlethods of Conservation space preservation (A) Conservation space may be preserved by any of the following means: 1. Dedication of the conservation space or of a conservation easement in perpetuity to and acceptance by the County for use as parks, recreation areas, or other suitable public purposes, or 2. Dedication for suitable public purpose of the conservation space or of a conservation easement in perpetuity to and acceptance by State or Federal agency or by a private, non-profit charitable organization qualified to accept such dedications in accordance with the Federal Internal Revenue Code. 3. The owner of the parcel on record may retain sole ownership of the conservation space provided the conservation space has not been used in calculating residential density. The conservation space shall not be subdivided. (718/02) 4. The conservation space may become the properly of a homeowner's association under the following conditions: (a) Such conservation space shall remain undivided and no lot or unit owner or any other person shall bring any action for partition or division of any part thereof except as provided in Chapter 47A (Unit Ownership Act) of the General Statutes. Each lot or unit owner's undivided interest shall be preserved through covenants running with the land. Title to such areas shall be encumbered for the perpetual benefit of the public generally or the private properties in the development, and all future use shall be consistent with the conservation space requirements. (b) All lots or units within the development shall have direct access to all conservation space as provided, by means of dedicated streets or within the development or by the fact of physical Fage 7 of 17 S~lanning Department: New Hanover County, NC contiguity to other public Iand or lands in common ownership of alI residents. The developer shall not place age, race, creed, sex or economic restrictions (other than maintenance assessments) upon lot or unit owners for the use of said conservation space. Land which is restricted iii any way so as to be for the use, benefit or enjoyment of a select group within the development shall not qualify as conservation space. (7/8102) (1) The Homeowner's Association or the non-profit organization shall be established before arty lo#s are sold; (2) Membership shall be mandatory for each lot buyer, and any successive buyer; (3)'The association shall provide for liability insurance, any taxes and the maintenance of all grounds and facilities; (4) Any sums levied by the association that remain unpaid shall become a lien upon the lot owner's property. (5) Design Storm - Stormwater runoff for the entire parcel wiII be managed by structures appropriately sized such that the peak rate of discharge from the site after completion of development for any storm up to and including the specified design storm, shall not exceed the peak rate of discharge from the site in its previous natrrral condition forthe specr£red design storm. The design storm is specified as occurring once every i0 years and lasting for 24 hours. Industrial, commercial, office ar institutional development on a parcel one acre or less in size and with a maximum impervious to gross site area ratio of less than .2 shall be exempt from this control. Discharge of run-off from impervious surfaces for the entire parcel directly into natural waterbodies shall not be allowed. Runoff shall be routed along vegetated swales, through filter media of vegetation, gravel, sand, or other media, or to detention ponds far purposes of increasing percolation, settling and filtering out ofnon-point pollutants and decreasing discharge velocity. ('~ fifer Stria -Buffer strip, i~required in accordance with Section 67, shaII not be extended through conservation space azeas. (5/6/85j (7) Historical and azchaeological sites (A) Tf a developer wishes to develop an historical or archaeological site, he shall either 1. Provide for a thorough site investigation by a professional historian or archaeologist, as appropriate, who shall prepare a written report with the following information: (a}Description of site (b) Relevant historical documentation/backgroundreeearch (c) Research, design {d) Field studies as actually implemented including any deviation from the design and the reason for the deviation (e) All field'observations (f) Analyses and results (g) Information on the location of original data in the form of field notes, photographs, and other materials (h) Proof that adequate creation of artifacts and records to ensure their preservation and access far further study will be provided (i) Recommendation for finther study and preservation of the site, given anticipated development . (j) Evaluation of the potential of the site for inclusion in the National Register of Historic Places. If the site is evaluated to have historical or azchaeelogical significance and is eligible for the National Register, every reasonable effort shall be made in the development to preserve it; or (Bj Give access rights for investigating tine site and acquisition nights to artifacts to the Planning Degariment or its designated agent for a period ofat least 60 days between issuance of the building permit and any development of the property that would impact the site. (8} If a developer wishes to develop a site with abandoned cemeteries, or an abandoned cemetery is discovered during the course of construction, he shall, provide for the delineation of said cemetery by a qualified expert, subject to approval by the County. Page 8 of 17 PROPOSED ROADWAY RIP RAP ENERGY DISSIPATER R/W R W N 1".97 EP EXISTING DITCH 17.55 - _ 17. 5 EP 30" RCP R/W AREA OF IMPACT EXISTING DITCH ROADWAY ~ // // // //\/ / ~ 30" RCP / j / _ TOP BANK TOP BANK - CL DITCH (D CL DITCH BURY PIPE 6" AREA OF IMPACT RIP RAP ENERGY MYRTLE VENTURES LLC DISSIPATER P.O. BOX 1229 WILMINGTON, NORTH CAROLINA 28402 PH. (910)-251-5030 BOTTOM OF TOP OF BANK -~` ~~ BANK a } MANHOLE ~' -ss 0 ss ss GRAVITY SEWER BOTTOM OF BANK PLAN VIEW PROFILE VIEW ss \REA OF IMPACT ~~ ~~ ~ BANK PoT~~T~aL sT~~a~ ~~~ac~ NOT TO SCALE _._ ------ -_ j ----- ------ i ~. 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TRY PPES SMP1L 9E 18' - " -...-. ~ NmMmdTBtle ,JJo CA "~I~~( MYRTLE LANDING DATE: ,SAD, ~ ~:~~... `t, I''~~ p/~y~~y~ LLC New Hanover County, NC R~°"°" ~ ~-~02 DISp51 V8m Blon, FNorth CW ItDL 28401 [f 1-•O/•~GyV}~A/11GGp8~ DRAw+ R~ xarRiDNiw ~ Phone: (910)343-IpgB ~ Foa'; (910)251-8282 ~~~`~w~, NvF7 E f7 L.AIIV~ ~2 tmall9 p~ r . 50' '7 ~a ""°°°"" `G°°°~~ ~, (51O~~~30 SITE GRADING, DRAINAGE AND P ~ ~R~ / "`""'~``""`°"~`"^ EROSION CONTROL PLAN srunl5. ~, ---.. _..__.______ ISSUED fOR PERMI'i'flNG ~ VJ N d SA ~k a~>eY~ ~~iS •S axn~i~ ~~ ~O h10llb(1F111N0~ ~ L JJ~I-~ M ~, _ I I o ,. I n. 1 II -- ~A , ~ .. '.~ U I , ~ ,; , - ~ - - ~, , ~I -~' 1 _ p ~j I ~ I ! ' 1 ! ^' t ~ i i i F ° gat ! i • ' I !' I I ~- - - I-- r ;_ .. ~ 0ti ~ e~~ li - o Cs ~ _ y I i _ .._ _.. W ~ ~; ~; ~ rr m o y w t ,~ - -- ~ol ~ ~ W p W i ' ~ a ~~. 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