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HomeMy WebLinkAbout20220672 Ver 2_Application Attachments_20231103Vermillion Village — Request for Permit Modification hlovember 2023 _ _ �.G -•may: �.a k • •, 1 • A. �. IL ti f . YT-1)y 4. go % PREPARED BY: Greenman -Pedersen, Inc. PREPARED FOR: Embrey Partners, LLC GPI Ms. Samantha Dailey Chief Charlotte Regulatory Field Office U.S. Army Corps of Engineers, Wilmington District 8430 University Executive Park Drive, Suite 615 Charlotte NC 28262 704.589.8397 Engineering f Design I Planning I Construction Management November 1, 2023 Ms. Sue Homewood 401 & Buffers Permitting Branch Division of Water Resources 512 North Salisbury Street 1617 Mail Service Center Raleigh NC 27699-1617 919.707.3679 Subject: Vermillion Village Development (SAW-2016-01916, DWR: #22-0672) Dear Ms. Samantha Dailey and Ms. Sue Homewood: During the development of the Vermillion Village Development project NCDOT and the Town of Huntersville requested a portion of Huntersville-Concord Road be widened within the vicinity of the property. This proposed roadway widening will require a culvert extension and headwall to be installed upstream of the existing culvert within the property. The Project Owner has offered to construct the extension and headwall to aid in the NCDOT roadway widening. The proposed extension will inherently require stream impacts to the stream located on the Vermilion Village property; however, these impacts are less than the thresholds established in the NWPs and Water Quality Certifications. The following request is to modify the previously submitted PCN documents on June 23, 2022; see Attachment 1. The impacts outlined in the previous submission included 0.002 acres of stream impact for a road crossing; see Figure 1 below for proposed and previous impact locations. Prfmous NW Ho. Si � T�--- Gmwmr PI - (Figure 1: Proposed Project Plan with previous and proposed impacts) Greenman -Pedersen, Inc. 1308 HWY 258 N Kinston, NC 28504 p 910.663.4123 An Equal Opportunity Employer GPIFrgineerinq I Design I Planning I Construction Management The proposed modification will include temporary and permanent stream bed impacts to the UT to South Prong Clark Creek resulting from the road widening. These impacts include the installation of the culvert extension, grading to ensure a smooth and stable transition from the existing channel to the culvert extension, and temporary impact during construction for equipment access (see Attachment 2: Culvert and Impacts Exhibit). Avoidance and minimization will be as previously proposed in the original PCN and NWP/WQC guidance: the proposed activities will follow all NC Sediment and Erosion Control Standards and make all efforts to minimize impact to vegetation and aquatic resources while conducting the work. We are requesting a waiver from Regional Condition Item C.9, with regard to burying a portion of the pipe, as this is an existing NCDOT pipe crossing that was installed in the late 1980s, from what our research concluded. Table 1 below lists the previously permitted impacts along with the proposed impacts associated with the roadway expansion. Previously Permitted 3 0 1 33 0.002 Proposed 5 17 1 36 0.006 Cumulative Impact (AC) 0.008 (Table 1: Previous and Proposed Impacts) Project site condition narrative, maps (parcel, aerial, USGS topo, soils, and existing condition), Jurisdictional Determination, and endangered and threatened species report can be found in Attachment 1 and encompasses the area for the proposed culvert extension. Attachment 2 includes the updated drawings for the proposed culvert. Attachment 3 includes the hydraulic and hydrologic analysis of the culvert. Please let us know if you have any questions or would like to discuss the proposed project further. Greenman -Pedersen, Inc. (GPI) Sincerely, n�UJ� �� Jonathan D. Hinkle, PE Lead Environmental Engineer / North Carolina Engineering Manager Vice President jhinkle@gpinet.com 910.663.4123 CC: File Mr. Joel Albea, Embrey Partners, LLC Mr. Brian Vitta, Embrey Partners, LLC Greenman -Pedersen, Inc. 1308 HWY 258 N Kinston, NC 28504 p 910.663.4123 An Equal Opportunity Employer Engineering I Design I Planning I Construction Management Attachment 1: Previously Submitted PCN: NWP - 29 (DWR # 22 - 0672) www.gpinet.com Engineering I Design I Planning I Construction Preliminary ORM Data Entry Fields for New Actions AEPG Wetlands and Environmental Planning Group Lerr :--I c P;*ifhier, PLLC. SAW - 2016 - 01916 BEGIN DATE [Received Date]: Prepare file folder ❑ 1. Project Name [PCN Form A2a]: Vermillion Village 2. Work Type: Private❑ Institutional ❑ 3. Project Description / Purpose [PCN Form 133d and 133e]: NWP 29 request for residential development Assign Action ID Number in ORM ❑ Government ❑ Commercial ❑ 4. Property Owner / Applicant [PCN Form A3 or A4]: Bowman Development (Applicant) 5. Agent / Consultant [PCN Form A5 — or ORM Consultant ID Number]: WEPG, PLLC c/o Heath Caldwell 6. Related Action ID Number(s) [PCN Form 135b]: 7. Project Location - Coordinates, Street Address, and/or Location Description [PCN Form 131b]: 35.4149,-80.8381 North Church Street, Huntersville, NC 28078 8. Project Location -Tax Parcel ID [PCN Form I31a]: 01902202, 01902201 9. Project Location -County [PCN Form A2b]: Mecklenburg 10. Project Location — Nearest Municipality or Town [PCN Form A2c]: Huntersville 11. Project Information —Nearest Waterbody [PCN Form 132a]: South Prong Clarke Creek 12. Watershed / 8-Digit Hydrologic Unit Code [PCN Form 132c]:Rocky (03040105) Authorization: Section 10 ❑ Section 404 Regulatory Action Type: ❑ Standard Permit U Nationwide Permit # 29 ❑ Regional General Permit # Jurisdictional Determination Request �✓ Section 10 & 404 ❑ ❑Pre -Application Request Unauthorized Activity ❑ Compliance ❑ No Permit Required CZ0I_irZ1y[4111110011% Wetlands and Environmental Planning Group Leonard S. Rindner, PLLC. April 14, 2022 Assigned Project Manager U.S. Army Corps of Engineers Charlotte Regulatory Field Office 8430 University Executive Park Drive Charlotte, NC 28262 Mr. Doug Perez NCDEQ Division of Water Resources 610 East Center Street, Suite 301 Mooresville, NC 28115 Mr. Paul Wojoski NCDEQ Division of Water Resources Wetlands & Storm Water Branch 512 North Salisbury Street Raleigh, NC 27604 Mr. Byron Hamstead U.S. Fish and Wildlife Service Asheville Field Office 160 Zillicoa St. Asheville, NC 28801 Subiect: SAW-2016-01916; Pre -Construction Notification for NWP #29 for the Vermillion Villages site in Huntersville, Mecklenburg County, North Carolina USACE Assigned Project Manager and Messrs. Perez, Wojoski, and Hamstead, Enclosed is a request for Nationwide Permit #29 for the Vermillion Villages site on 29.43 acres located east of N. Church Street in Huntersville, NC. The site is a proposed residential development and consists of three streams and six wetlands. An Approved Jurisdictional Determination Request was authorized in December 2016. Please refer to the Jurisdictional Determination Information section for information on onsite surface waters. As shown on the attached exhibits, the proposed project will include permanent impacts to one stream for road crossing access. Total permanent impacts proposed include 33 linear feet (0.002 acres) of stream impact (Stream J). These access crossings were necessary due to City connectivity requirements as well as constraints from existing sewer line infrastructure. Charlotte Office: 10612-D Providence Rd. PMB 550 Charlotte, NC 28277 (704)904-2277 len.rindner@wetlands-epg.com www.wetiands-epg.com Asheville Office: 1070 Tunnel Rd., Bldg. I Suite 10, PM 283 Asheville, NC 28805 Wetlands and Environmental Planning Group Leonard S. Rindner, PLLC. Overall impacts to site surface waters associated with the proposed development were limited through site selection location, design, and the location/orientation of the proposed lots and access routes. Headwalls are proposed at the crossing and, where possible, 2:1 slopes will be implemented to limit impacts to site surface waters. The applicant has demonstrated substantial avoidance and minimization efforts in which 94.7% of the 685 linear feet onsite streams will be avoided. No wetland impacts are proposed as a part of this project. Due to limited site impacts, no mitigation is proposed. Also enclosed is a copy of our Threatened/Endangered Species Evaluation for the site. No listed species were identified within the project area. The concurrence determination on listed species and their critical habitat, as designated under Section 7 of the Endangered Species Act, was obtained by Fish & Wildlife services. Please refer to the Threatened and Endangered Species Evaluation Section for additional details on the terrestrial species evaluation and a copy of the FWS concurrence. Thank you for your consideration and please contact me if you have any questions, (704) 999-5279 or email at heath. cal dwell( a�wetlands-ep com. Sincerely, V�rauiw Heath Caldwell Environmental Scientist Charlotte Office: 10612-D Providence Rd. PMB 550 Charlotte, NC 28277 (704)904-2277 len.rindner@wetlands-epg.com www.wetiands-epg.com Len Rindner, PWS Principal Asheville Office: 1070 Tunnel Rd., Bldg. I Suite 10, PMB 283 Asheville, NC 28805 C O V d d Q L. N CL Permit Application ai a ob C 0 m E 102 cm C .y N V 01 IL Zi 0 k x ! 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Anent Authorization Letter The purpose of this form is to authorize our firm to act on your behalf in matters related to aquatic resource (i.e. stream/wetlands) identification/mapping and regulatory permitting. The undersigned, who are either registered property owners or legally authorized to conduct due diligence activities on the property as identified below, do hereby authorize associates of Leonard S. Rindner, PLLC, Wetlands and Environmental Planning Group (WEPG) to act on my behalf and take all actions necessary for the processing, issuance, and acceptance of applicable permit(s) and/or certification(s). Project/Site Name: Vermillion Village Property Address: North Church Street, Huntersville, NC 28078 Parcel Identification Number (PIN): 01902202, 01902201 Select one: I am other Name: Nate Bowman Company: Bowman Development Mailing Address: 13815 Cinnabar Place Huntersville, NC 28078 Telephone Number: (704)875-9704 ext. 105 Electronic Mail Address: bowman3l@gmail.com O 4wd l Interested Buyer* / Other* The Interested Buyer/01her acknowledges that an agreement and/or formal contract to purchase and/or conduct due diligence activities exists between the current properly owner and the signatory of this authorization in cases inhere the properly is not owned by the signatory. Charlotte Office: www.wetlands-epg.com Asheville Office: 10612-D Providence Rd. 1070 Tunnel Rd., Bldg. I PMB 550 Suite 10, PMB 283 Charlotte, NC 28277 Asheville, NC 28805 (704)904-2277 len.rindner@wetlands-epg.com N _05 N Q 05 10 Maps/Plans I LLAG E V' Hurtersville ® 115 Mobile Auto 2452 Chlurch St 5herW00d,Dr 125 Ile ARP Church 19 ,y x rp p � m American Legion 19 2452 Muria Made Distillery V Mini 1j 1P 7 Hubbard's Cupboards 19 & Fixtures id Sparrows hen PROJECT BOUNDARY STUDY LIMITS t S[ St v v .N `tu C 7 z 9 R/ �ilat' Gta`$u, Yappy Hour Bakery Mobile boutique arl Harvey's Hun WFree Delivery on 1 st Order D1d Vermillion Dr w A N 2a Pamela H. Bowman Park N Main Street Coffee 3.., o�eti sr�t pc I a Acres: VERMILLION VILLAGE Prepared for: +/- 29.43 Mecklenburg Co., NC BOWMAN DEVELOPMENT FIGURE 1 VICINITY MAP Drawn By: Reviewed By: 08124121 Subject to USACE/NCDEQ verification BLK ALL 17 Ir FL - �ffEF all. rd�__1499 ] i a ---I 31n 3 �W - If-, 1 " _ 1 �f� Main St 4 1 `� f PROJECT BOUNDARY PARCEL: 01902201 E 1 1 �• STUDY LIMITS VERMILLION ANCHOR o M I LL VI LLAG E LLC r a + ! �_ IUC 1 ri E •� - 13815 CINNABAR PL HUNTERSVILLE NC 28078 ! ! yy �h r I ccAr I ■1� � °6"'J r � L EP' ,/ 4* �I !y �.17317i'- "� 1� ------_BighamSt ` / - \ E ��- _;,3rd,St ,�� ��.�� \ice' �p �,� , �� •�. PARCEL: 01902202 VERMILLION ANCHOR 4- a } ®q MILL VILLAGE LLC r I� , a 13815 CINNABAR PL HUNTERSVILLE NC 28078 r v - E I J014� �' � CIIE I -r-� -} ---S�c`a-n-iT•5�t �'. , �� ly:��iA�-�,�o� �'�`� a ell Al . f 'Parcel Information Provided by Charlotte Mecklenburg Polaris 3G 4 r' < / Acres: VERMILLION VILLAGE Prepared for: FIGURE +/- 29.43 Mecklenburg Co., NC BOWMAN DEVELOPMENT _ 2 PARCEL MAP Drawn By: Reviewed By: 08124121 Subject to USACE/NCDEQ verification BILK , r. PROJECT BOUNDARY STUDY LIMITS It. •'- � � •r ''' � .. .ter' = ��.444. Y AFA )46 ti • . 4. h ' Sri N Aerial Imagery Provided by y '�Jkgs,'`•'= Charlotte Mecklenburg Polaris 3G I y+r Acres: VERMILLION VILLAGE Prepared for: +/- 29.43 BOWMAN DEVELOPMENT FIGURE Mecklenburg Co., NC 3 AERIAL MAP Drawn By: Reviewed By: 08124121 Subject to USACE/NCDEQ verification BILK 39 " now ■ + ., +f 1 PROJECT BOUNDARY+r f� STUDY LIMITST''� t - rt ■ m. y w , J � " r ■ ■ it �' �'� ♦ 1 ` l =_' I� ` r SOUTH PRONG s�* w r•� ��� CLARKECREEK SON ■ . Big s ■ T — 440 / - �_ ■ 6 S 1 h Or d ILOCATION ' Lat: 35.4149 - N � ' L� • �� Long: -80.8381 2W USGS QUAD i� g Cornelius NC SCALES Jr' ■�— H UC: 03040105 ROCKY 1993 1:24,000 a�r` r f� Acres: VERMILLION VILLAGE Prepared for: WFPG FIGURE +/- 29.43 Mecklenburg Co., NC BOWMAN DEVELOPMENT _ 4 USGS MAP Drawn By: Reviewed By: 08124121 Subject to USACE/NCDEQ verification BLK W I LO/ N ER Soil Survey Manuscript klenburg County 1980 Map Unit Symbol L J L_ Totals for Area of Interest Acres: +/- 29.43 FIGURE 5 08124121 PROJECT BOUNDARY STUDY LIMITS CeB 2 Map Unit Name Cecil sandy day loam, 2 to 8 percent slopes, moderately eroded Cecil sandy clay loam. 8 to 15 percent slopes, moderately eroded Cecil -Urban land complex 2 to 8 percent slopes VERMILLION VILLAGE Mecklenburg Co., NC SOIL SURVEY MANUSCRIPT MAP Subject to USACE/NCDEQ verification T6 29.8 Prepared for: 3OWMAN DEVELOPMENT Drawn By: I Reviewed By BILK Percent of AOI J 25 "Ll 100.0% U) N (n Z OUZO V G L LiXZ o Lu 0 U \ � P } } o \r\ 0 0 0 LO N N '` oasac J \° o_ p Lu z aQQ '�� z � F CAC4U Qc,>Za'SU F O Z LL Q LL V °"�—�U— D J C CD H O r W W �Z W 2 — Cn W LOCO Q \\ X W _ oo one W z r " 5 o am �2,p �5�ooh W a� 5" (D U W U Q d F_ Q< a- LLl U U U 0 Q U Z Q Q Z z00 J OJ zM o v O Q JJ CT=/^ LJJU d—O F O Q QO O W+i CD +I O +I Z J LL00 yz W Qo Lr)UW \ Z Q O U) oLL z � U W +� i W 2 \ z w SPRING BOX AND PIPE a o w � = o N °° 780 �L6 n� N~0 �r`Z m'�> > FEZ C0EEZ Approximate 8" Water Main "A" (No Impact w/ Stream) Stream Impact: Approximate 4" Force Main Crossing m 770 Stream Impact: r ITI Approximate location of 8" Gravity Sewer > Crossing O Stream Impact: z Proposed Retaining Wall Approximate 24" Stormdrain °° (No Impact w/ Stream) o° ° 0 760 °°° \ °-- o Perforated Pipe to be surrounded � ° by 12 inch of 2" Stone and Fabric o° on top and sides 0 � 4.0' of Pipe before exit through ° wall to be unperforated (Buried 1') Perforated Pipe to be surrounded by 18 inch of 2" Stone and Fabric on bottom 65.15' of 15 inch HDPE Pipe @ 11.45% 750 -0+30 0+00 0+85 0 00 ao m r-- ti M — CO Cp � � 1 1— r- w LL w w LL w LL LL 0+00 STATION W H Q L U J C/) LU > = J Z U 0 J = LU J U � W z Y N 0Uz0 NW /n z ooUFw wUOwQ Q U X LU 0 0 a� ry z O o W U - a 0 wU o 0 rn �/ xQ co 0 0 c6 O o > m � > ° _ in V O d S O 0 � u zzL O � O [C79L:93 J < W Q �� ^ J � � 981'15L�� 9 0 01 coo coV 0 6L'LSL:93 O 5L 6'69L:9J < U o 0 v C) w 0 0 w ry ELEVATION U 0 w W ~(Dw � m� �z O �> oz�> =-1 O z� =w ry U n H z w O .4-j co .E w jurisdictional Determination Information W OC in r-I W N LL LD d D 00 4� O LO m = 2 m Y _ _ > Q L _ Z 4^ . I` M W � LL LL w O N Qj cp o qqq� LO fV C z LU LU d o a _ z o � ~ + N r j O �1 YenW a N N Q Z LU Lr) v a � L j o Q z a Jo > U z o Z W O : a LJJ C C U z_ , J C N cc G 0 jLn N O Q ol Q _ 7 [. 1 W o V a L 0 LL Q M r . w F- u a - W N S a � o -7 g enw o p Z W L 0 W w LLIF LLI a v a eqv L p LL —.� -.,�-ter _ _"I'_'-•� C W LA '� a p� (J U.S. ARMY CORPS OF ENGINEERS WILMINGTON DISTRICT Action Id. SAW-2016-01916 County: Mecklenburg U.S.G.S. Quad: NC -Cornelius NOTIFICATION OF JURISDICTIONAL DETERMINATION Property Owner: Bowman Develooment Grouo Drew Bowman Address: 13815 Cinnabar Place Huntersville, NC 28078 Telephone Number: 704-875-9704 ext. 105 E-mail: bowman3l(&2mail.com Size (acres) 4.25 Nearest Town Huntersville Nearest Waterway Clarke Creek River Basin Uooer Pee Dee USGS HUC 03040105 Coordinates Latitude: 35.4149 Longitude:-80.8381 Location description: The review area is located on the west side of Huntersville-Concord Road, 0.5 miles northeast of the intersection of Huntersville-Concord Road and Old Statesville Road. PINS: 01902201 and 01902108. Reference review area descriution shown in Jurisdictional Determination Request uackage entitled "Figure No.2 Aerial Mad' with a Printed Date of 09/06/2016. Indicate Which of the Following Apply: A. Preliminary Determination ❑ There appear to be waters including wetlands, on the above described project area/property, that may be subject to Section 404 of the Clean Water Act (CWA)(33 USC § 1344) and/or Section 10 of the Rivers and Harbors Act (RHA) (33 USC § 403). The waters including wetlands, have been delineated, and the delineation has been verified by the Corps to be sufficiently accurate and reliable. The approximate boundaries of these waters are shown on the enclosed delineation map dated MAP DATE. Therefore this preliminary jurisdiction determination may be used in the permit evaluation process, including determining compensatory mitigation. For purposes of computation of impacts, compensatory mitigation requirements, and other resource protection measures, a permit decision made on the basis of a preliminary JD will treat all waters and wetlands that would be affected in any way by the permitted activity on the site as if they are jurisdictional waters of the U.S. This preliminary determination is not an appealable action under the Regulatory Program Administrative Appeal Process (Reference 33 CFR Part 331). However, you may request an approved JD, which is an appealable action, by contacting the Corps district for further instruction. ❑ There appear to be waters including wetlands, on the above described project area/property, that may be subject to Section 404 of the Clean Water Act (CWA)(33 USC § 1344) and/or Section 10 of the Rivers and Harbors Act (RHA) (33 USC § 403). However, since the waters including wetlands, have not been properly delineated, this preliminary jurisdiction determination may not be used in the permit evaluation process. Without a verified wetland delineation, this preliminary determination is merely an effective presumption of CWA/RHA jurisdiction over all of the waters including wetlands, at the project area, which is not sufficiently accurate and reliable to support an enforceable permit decision. We recommend that you have the waters including wetlands, on your project area/property delineated. As the Corps may not be able to accomplish this wetland delineation in a timely manner, you may wish to obtain a consultant to conduct a delineation that can be verified by the Corps. B. Approved Determination ❑ There are Navigable Waters of the United States within the above described project area/property subject to the permit requirements of Section 10 of the Rivers and Harbors Act (RHA) (33 USC § 403) and Section 404 of the Clean Water Act (CWA)(33 USC § 1344). Unless there is a change in law or our published regulations, this determination may be relied upon for a period not to exceed five years from the date of this notification. ® There are waters including wetlands, on the above described project area/property subject to the permit requirements of Section 404 of the Clean Water Act (CWA) (33 USC § 1344). Unless there is a change in the law or our published regulations, this determination may be relied upon for a period not to exceed five years from the date of this notification. ❑ We recommend you have the waters including wetlands, on your project area/property delineated. As the Corps may not be able to accomplish this wetland delineation in a timely manner, you may wish to obtain a consultant to conduct a delineation that can be verified by the Corps. SAW-2016-01916 ® The waters including wetlands, on your project area/property have been delineated and the delineation has been verified by the Corps. The approximate boundaries of these waters are shown on the enclosed delineation map dated 10/26/2016. If you wish to have the delineation surveyed, the Corps can review and verify the survey upon completion. Once verified, this survey will provide an accurate depiction of all areas subject to CWA and/or RHA jurisdiction on your property which, provided there is no change in the law or our published regulations, may be relied upon for a period not to exceed five years. ❑ The waters including wetlands, have been delineated and surveyed and are accurately depicted on the plat signed by the Corps Regulatory Official identified below on SURVEY SIGNED DATE. Unless there is a change in the law or our published regulations, this determination may be relied upon for a period not to exceed five years from the date of this notification. ❑ There are no waters of the U.S., to include wetlands, present on the above described project area/property which are subject to the permit requirements of Section 404 of the Clean Water Act (33 USC 1344). Unless there is a change in the law or our published regulations, this determination may be relied upon for a period not to exceed five years from the date of this notification. ❑ The property is located in one of the 20 Coastal Counties subject to regulation under the Coastal Area Management Act (CAMA). You should contact the Division of Coastal Management in Morehead City, NC, at (252) 808-2808 to determine their requirements. Placement of dredged or fill material within waters of the US, including wetlands, without a Department of the Army permit may constitute a violation of Section 301 of the Clean Water Act (33 USC § 1311). Placement of dredged or fill material, construction or placement of structures, or work within navigable waters of the United States without a Department of the Army permit may constitute a violation of Sections 9 and/or 10 of the Rivers and Harbors Act (33 USC § 401 and/or 403). If you have any questions regarding this determination and/or the Corps regulatory program, please contact David Shaeffer at 704-510-1437 or david.l. shaeffernu sace. army. mil. C. Basis For Determination: Basis For Determination: See the approved iurisdictional determination form dated 12/07/2017. D. Remarks: None. E. Attention USDA Program Participants This delineation/determination has been conducted to identify the limits of Corps' Clean Water Act jurisdiction for the particular site identified in this request. The delineation/determination may not be valid for the wetland conservation provisions of the Food Security Act of 1985. If you or your tenant are USDA Program participants, or anticipate participation in USDA programs, you should request a certified wetland determination from the local office of the Natural Resources Conservation Service, prior to starting work. F. Appeals Information (This information applies only to approved jurisdictional determinations as indicated in B. above) This correspondence constitutes an approved jurisdictional determination for the above described site. If you object to this determination, you may request an administrative appeal under Corps regulations at 33 CFR Part 331. Enclosed you will find a Notification of Appeal Process (NAP) fact sheet and request for appeal (RFA) form. If you request to appeal this determination you must submit a completed RFA form to the following address: US Army Corps of Engineers South Atlantic Division Attn: Jason Steele, Review Officer 60 Forsyth Street SW, Room 10M15 Atlanta, Georgia 30303-8801 In order for an RFA to be accepted by the Corps, the Corps must determine that it is complete, that it meets the criteria for appeal under 33 CFR part 331.5, and that it has been received by the Division Office within 60 days of the date of the NAP. Should you decide to submit an RFA form, it must be received at the above address by 02/05/2018. **It is not necessary to submit an RFA form to the Division Office if you do not object to the determination in this correspondence. RODEN o,g,lly,.g�.dNya DENNE.NOLDS.KN.AN.KENNE�.1263a5s .-U.S.me .-D,ou=PKL ou=NSA, 1--N Corps Regulatory Official: REYNOLDS.BRYAN.KENNETH.1263385574 "" Date of JD: 12/07/2017 Expiration Date of JD: 12/06/2022 SAW-2016-01916 The Wilmington District is committed to providing the highest level of support to the public. To help us ensure we continue to do so, please complete the Customer Satisfaction Survey located at http://corpsmapu.usace.anny.mil/cm_apex/Vp=136:4:0 Copy furnished: Agent: Wetlands and Environmental Planning Grout) Leonard Rindner Address: 10612-D Providence Road, PMB 550 Charlotte, NC 28277 Telephone Number: 704-904-2277 E-mail: len.rindner(&wetlands-et)g.com SAW-2016-01916 NOTIFICATION OF ADMINISTRATIVE APPEAL OPTIONS AND PROCESS AND REQUEST FOR APPEAL Applicant: Bowman Development Grout), Drew File Number: SAW-2016-01916 Date: 12/07/2017 Bowman Attached is: See Section below ❑ INITIAL PROFFERED PERMIT Standard Permit or Letter ofpermission) A ❑ PROFFERED PERMIT Standard Permit or Letter ofpermission B ❑ PERMIT DENIAL C ® APPROVED JURISDICTIONAL DETERMINATION D ❑ PRELIMINARY JURISDICTIONAL DETERMINATION E SECTION I - The following identifies your rights and options regarding an administrative appeal of the above decision. Additional information may be found at or http://www.usace.gM.mil/Missions/CivilWorks/Res4ulatoiyPros4ramandPennits.aspx or the Corps regulations at 33 CFR Part 331. A: INITIAL PROFFERED PERMIT: You may accept or object to the permit. • ACCEPT: If you received a Standard Permit, you may sign the permit document and return it to the district engineer for final authorization. If you received a Letter of Permission (LOP), you may accept the LOP and your work is authorized. Your signature on the Standard Permit or acceptance of the LOP means that you accept the permit in its entirety, and waive all rights to appeal the permit, including its terms and conditions, and approved jurisdictional determinations associated with the permit. • OBJECT: If you object to the permit (Standard or LOP) because of certain terms and conditions therein, you may request that the permit be modified accordingly. You must complete Section 11 of this form and return the form to the district engineer. Your objections must be received by the district engineer within 60 days of the date of this notice, or you will forfeit your right to appeal the permit in the future. Upon receipt of your letter, the district engineer will evaluate your objections and may: (a) modify the permit to address all of your concerns, (b) modify the permit to address some of your objections, or (c) not modify the permit having determined that the permit should be issued as previously written. After evaluating your objections, the district engineer will send you a proffered permit for your reconsideration, as indicated in Section B below. B: PROFFERED PERMIT: You may accept or appeal the permit • ACCEPT: If you received a Standard Permit, you may sign the permit document and return it to the district engineer for final authorization. If you received a Letter of Permission (LOP), you may accept the LOP and your work is authorized. Your signature on the Standard Permit or acceptance of the LOP means that you accept the permit in its entirety, and waive all rights to appeal the permit, including its terms and conditions, and approved jurisdictional determinations associated with the permit. • APPEAL: If you choose to decline the proffered permit (Standard or LOP) because of certain terms and conditions therein, you may appeal the declined permit under the Corps of Engineers Administrative Appeal Process by completing Section 11 of this form and sending the form to the division engineer. This form must be received by the division engineer within 60 days of the date of this notice. C: PERMIT DENIAL: You may appeal the denial of a permit under the Corps of Engineers Administrative Appeal Process by completing Section II of this form and sending the form to the division engineer. This form must be received by the division engineer within 60 days of the date of this notice. D: APPROVED JURISDICTIONAL DETERMINATION: You may accept or appeal the approved JD or provide new information. • ACCEPT: You do not need to notify the Corps to accept an approved JD. Failure to notify the Corps within 60 days of the date of this notice, means that you accept the approved JD in its entirety, and waive all rights to appeal the approved JD. • APPEAL: If you disagree with the approved JD, you may appeal the approved JD under the Corps of Engineers Administrative Appeal Process by completing Section II of this form and sending the form to the district engineer. This form must be received by the division engineer within 60 days of the date of this notice. SAW-2016-01916 E: PRELIMINARY JURISDICTIONAL DETERMINATION: You do not need to respond to the Corps regarding the preliminary JD. The Preliminary JD is not appealable. If you wish, you may request an approved JD (which may be appealed), by contacting the Corps district for further instruction. Also you may provide new information for further consideration by the Corps to reevaluate the JD. SECTION II - REQUEST FOR APPEA CTIONS TO AN INITIAL PROFFERED PERMIT REASONS FOR APPEAL OR OBJECTIONS: (Describe your reasons for appealing the decision or your objections to an initial proffered permit in clear concise statements. You may attach additional information to this form to clarify where your reasons or objections are addressed in the administrative record.) ADDITIONAL INFORMATION: The appeal is limited to a review of the administrative record, the Corps memorandum for the record of the appeal conference or meeting, and any supplemental information that the review officer has determined is needed to clarify the administrative record. Neither the appellant nor the Corps may add new information or analyses to the record. However, you may provide additional information to clarify the location of information that is already in the administrative record. POINT OF CONTACT FOR QUESTIONS OR INFORMATION: If you have questions regarding this decision and/or the If you only have questions regarding the appeal process you may appeal process you may contact: also contact: District Engineer, Wilmington Regulatory Division Mr. Jason Steele, Administrative Appeal Review Officer Attn: David Shaeffer CESAD-PDO Asheville Regulatory Office U.S. Army Corps of Engineers, South Atlantic Division U.S Army Corps of Engineers 60 Forsyth Street, Room 1OM15 151 Patton Avenue, Room 208 Atlanta, Georgia 30303-8801 Asheville, North Carolina 28801 Phone: (404) 562-5137 RIGHT OF ENTRY: Your signature below grants the right of entry to Corps of Engineers personnel, and any government consultants, to conduct investigations of the project site during the course of the appeal process. You will be provided a 15 day notice of any site investigation, and will have the opportuni to participate in all site investi ations. Date: Telephone number: Signature of appellant or agent. For appeals on Initial Proffered Permits send this form to: District Engineer, Wilmington Regulatory Division, Attn: David Shaeffer, 69 Darlington Avenue, Wilmington, North Carolina 28403 For Permit denials, Proffered Permits and Approved Jurisdictional Determinations send this form to: Division Engineer, Commander, U.S. Army Engineer Division, South Atlantic, Attn: Mr. Jason Steele, Administrative Appeal Officer, CESAD-PDO, 60 Forsyth Street, Room 1OM15, Atlanta, Georgia 30303-8801 Phone: (404) 562-5137 APPROVED JURISDICTIONAL DETERMINATION FORM U.S. Army Corps of Engineers This form should be completed by following the instructions provided in Section IV of the JD Form Instructional Guidebook. SECTION L• BACKGROUND INFORMATION A. REPORT COMPLETION DATE FOR APPROVED JURISDICTIONAL DETERMINATION (JD): 12/07/2017 B. DISTRICT OFFICE, FILE NAME, AND NUMBER: Wilmington District, Anchor Mill Site, SAW-2016-01916 C. PROJECT LOCATION AND BACKGROUND INFORMATION: The review area is located on the west side of Huntersville- Concord Road, 0.5 miles northeast of the intersection of Huntersville-Concord Road and Old Statesville Road. PINS: 01902201 and 01902108. Reference review area description shown in Jurisdictional Determination Request package entitled "Figure No.2 Aerial Map" with a Printed Date of 09/06/2016. State: NC County/parish/borough: Mecklenburg City: Huntersville Center coordinates of site (lat/long in degree decimal format): Lat. 35.4149 , Long.-80.8381 Universal Transverse Mercator: Name of nearest waterbody: Clarke Creek Name of nearest Traditional Navigable Water (TNW) into which the aquatic resource flows: Name of watershed or Hydrologic Unit Code (HUC): 03040105 ® Check if map/diagram of review area and/or potential jurisdictional areas is/are available upon request. ❑ Check if other sites (e.g., offsite mitigation sites, disposal sites, etc... ) are associated with this action and are recorded on a different JD form: D. REVIEW PERFORMED FOR SITE EVALUATION (CHECK ALL THAT APPLY): ❑ Office (Desk) Determination. Date: ® Field Determination. Date(s): 10/20/2016 SECTION IL• SUMMARY OF FINDINGS A. RHA SECTION 10 DETERMINATION OF JURISDICTION. There are no "navigable waters of the U.S." within Rivers and Harbors Act (RHA) jurisdiction (as defined by 33 CFR part 329) in the review area. [Required] ❑ Waters subject to the ebb and flow of the tide. ❑ Waters are presently used, or have been used in the past, or may be susceptible for use to transport interstate or foreign commerce. Explain: B. CWA SECTION 404 DETERMINATION OF JURISDICTION. There are "waters of the U.S." within Clean Water Act (CWA) jurisdiction (as defined by 33 CFR part 328) in the review area. [Required] 1. Waters of the U.S. a. Indicate presence of waters of U.S. in review area (check all that apply): ' ❑ TNWs, including territorial seas ❑ Wetlands adjacent to TNWs ® Relatively permanent waters2 (RPWs) that flow directly or indirectly into TNWs ❑ Non-RPWs that flow directly or indirectly into TNWs ® Wetlands directly abutting RPWs that flow directly or indirectly into TNWs ❑ Wetlands adjacent to but not directly abutting RPWs that flow directly or indirectly into TNWs ❑ Wetlands adjacent to non-RPWs that flow directly or indirectly into TNWs ❑ Impoundments of jurisdictional waters ❑ Isolated (interstate or intrastate) waters, including isolated wetlands b. Identify (estimate) size of waters of the U.S. in the review area: Non -wetland waters: 1,075 linear feet, 5' wide, and/or 0.12 acres. Wetlands: 0.23 acres. c. Limits (boundaries) of jurisdiction based on: Established by OHW`M. Elevation of established OHWM (if known): 2. Non -regulated waters/wetlands (check if applicable):3 ❑ Potentially jurisdictional waters and/or wetlands were assessed within the review area and determined to be not jurisdictional. Explain: SECTION III: CWA ANALYSIS A. TNWs AND WETLANDS ADJACENT TO TNWs ' Boxes checked below shall be supported by completing the appropriate sections in Section III below. 2 For purposes of this form, an RPW is defined as a tributary that is not a TNW and that typically flows year-round or has continuous flow at least "seasonally" (e.g., typically 3 months). s Supporting documentation is presented in Section IILF. The agencies will assert jurisdiction over TNWs and wetlands adjacent to TNWs. If the aquatic resource is a TNW, complete Section IH.A.1 and Section IH.D.1. only; if the aquatic resource is a wetland adjacent to a TNW, complete Sections HLA.1 and 2 and Section HID.1.; otherwise, see Section HIB below. 1. TNW Identify TNW: Summarize rationale supporting determination: 2. Wetland adjacent to TNW Summarize rationale supporting conclusion that wetland is "adjacenf': B. CHARACTERISTICS OF TRIBUTARY (THAT IS NOT A TNW) AND ITS ADJACENT WETLANDS (IF ANY): This section summarizes information regarding characteristics of the tributary and its adjacent wetlands, if any, and it helps determine whether or not the standards for jurisdiction established under Rapanos have been met. The agencies will assert jurisdiction over non -navigable tributaries of TNWs where the tributaries are "relatively permanent waters" (RPWs), i.e. tributaries that typically flow year-round or have continuous flow at least seasonally (e.g., typically 3 months). A wetland that directly abuts an RPW is also jurisdictional. If the aquatic resource is not a TNW, but has year-round (perennial) flow, skip to Section HID.2. If the aquatic resource is a wetland directly abutting a tributary with perennial flow, skip to Section IH.D.4. A wetland that is adjacent to but that does not directly abut an RPW requires a significant nexus evaluation. Corps districts and EPA regions will include in the record any available information that documents the existence of a significant nexus between a relatively permanent tributary that is not perennial (and its adjacent wetlands if any) and a traditional navigable water, even though a significant nexus finding is not required as a matter of law. If the waterbody4 is not an RPW, or a wetland directly abutting an RPW, a JD will require additional data to determine if the waterbody has a significant nexus with a TNW. If the tributary has adjacent wetlands, the significant nexus evaluation must consider the tributary in combination with all of its adjacent wetlands. This significant nexus evaluation that combines, for analytical purposes, the tributary and all of its adjacent wetlands is used whether the review area identified in the JD request is the tributary, or its adjacent wetlands, or both. If the JD covers a tributary with adjacent wetlands, complete Section III.B.1 for the tributary, Section III.B.2 for any onsite wetlands, and Section HI.B.3 for all wetlands adjacent to that tributary, both onsite and offsite. The determination whether a significant nexus exists is determined in Section IH.0 below. 1. Characteristics of non-TNWs that flow directly or indirectly into TNW (i) General Area Conditions: Watershed size: 230 square miles Drainage area: 70 acres Average annual rainfall: 44 inches Average annual snowfall: 0 inches (ii) Physical Characteristics: (a) Relationship with TNW: ❑ Tributary flows directly into TNW. ® Tributary flows through 3 tributaries before entering TNW. Project waters are 5-10 river miles from TNW. Project waters are 1 (or less) river miles from RPW. Project waters are 5-10 aerial (straight) miles from TNW. Project waters are 1 (or less) aerial (straight) miles from RPW. Project waters cross or serve as state boundaries. Explain: Identify flow route to TNWS: Jurisdictional features on the site flow into South Prong Clarke Creek, to Clark Creek, then to Rocky River (TNW). Tributary stream order, if known: 4 Note that the Instructional Guidebook contains additional information regarding swales, ditches, washes, and erosional features generally and in the and West. s Flow route can be described by identifying, e.g., tributary a, which flows through the review area, to flow into tributary b, which then flows into TNW. (b) General Tributary Characteristics (check all that appa): Tributary is: ® Natural ❑ Artificial (man-made). Explain: ❑ Manipulated (man -altered). Explain: Tributary properties with respect to top of bank (estimate): Average width: 5 feet Average depth: +/-3 feet Average side slopes: 2:1. Primary tributary substrate composition (check all that apply): ® Silts ® Sands ❑ Concrete ® Cobbles ® Gravel ❑ Muck ❑ Bedrock ❑ Vegetation. Type/% cover: ❑ Other. Explain: Tributary condition/stability [e.g., highly eroding, sloughing banks]. Explain: Presence of run/riffle/pool complexes. Explain: Tributary geometry: Relatively straight Tributary gradient (approximate average slope): % (c) N'low: Tributary provides for: Seasonal flow Estimate average number of flow events in review area/year: 20 (or greater) Describe flow regime: Flow of RPW A and B is perennial. Flow of RPW J is intermittent. Reference NCDWQ Stream Identification Forms in the Jurisdictional Determination Request package. Other information on duration and volume: Surface flow is: Discrete and confined. Characteristics: Subsurface flow: Unknown. Explain findings: ❑ Dye (or other) test performed: Tributary has (check all that apply): ® Bed and banks ® OHWM' (check all indicators that apply): ❑ clear, natural line impressed on the bank ® changes in the character of soil ® shelving ❑ vegetation matted down, bent, or absent ® leaf litter disturbed or washed away ® sediment deposition ❑ water staining ❑ other (list): ❑ Discontinuous OHWM.' Explain: ® the presence of litter and debris ❑ destruction of terrestrial vegetation ® the presence of wrack line ® sediment sorting ® scour ❑ multiple observed or predicted flow events ❑ abrupt change in plant community If factors other than the OHWM were used to determine lateral extent of CWA jurisdiction (check all that apply): ❑ High Tide Line indicated by: ❑ Mean High Water Mark indicated by: ❑ oil or scum line along shore objects ❑ survey to available datum, ❑ fine shell or debris deposits (foreshore) ❑ physical markings; ❑ physical markings/characteristics ❑ vegetation lines/changes in vegetation types. ❑ tidal gauges ❑ other (list): (iii) Chemical Characteristics: Characterize tributary (e.g., water color is clear, discolored, oily film, water quality; general watershed characteristics, etc.). Explain: Water is clear — no signs of pollutants. Identify specific pollutants, if known: 'A natural or man-made discontinuity in the OHWM does not necessarily sever jurisdiction (e.g., where the stream temporarily flows underground, or where the OHWM has been removed by development or agricultural practices). Where there is a break in the OHWM that is unrelated to the waterbody's flow regime (e.g., flow over a rock outcrop or through a culvert), the agencies will look for indicators of flow above and below the break. 'Ibid. (iv) Biological Characteristics. Channel supports (check all that apply): ❑ Riparian corridor. Characteristics (type, average width): ® Wetland fringe. Characteristics: Forested wetlands about onsite, Seasonal/Perennial RPW Tributaries. ® Habitat for: ❑ Federally Listed species. Explain findings: ❑ Fish/spawn areas. Explain findings: ❑ Other environmentally -sensitive species. Explain findings: ® Aquatic/wildlife diversity. Explain findings: Typical aquatic and wildlife diversity. 2. Characteristics of wetlands adjacent to non-TNW that flow directly or indirectly into TNW (i) Physical Characteristics: (a) General Wetland Characteristics: Properties: Wetland size: acres Wetland type. Explain: Wetland quality. Explain: Project wetlands cross or serve as state boundaries. Explain: (b) General Flow Relationship with Non-TNW: Flow is: Pick List. Explain: Surface flow is: Pick List Characteristics: Subsurface flow: Pick List. Explain findings: ❑ Dye (or other) test performed: (c) Wetland Adjacency Determination with Non-TNW: ❑ Directly abutting ❑ Not directly abutting ❑ Discrete wetland hydrologic connection. Explain: ❑ Ecological connection. Explain: ❑ Separated by berm/barrier. Explain: (d) Proximity_(Relationship) to TNW Project wetlands are Pick List river miles from TNW. Project waters are Pick List aerial (straight) miles from TNW. Flow is from: Pick List. Estimate approximate location of wetland as within the Pick List floodplain. (ii) Chemical Characteristics: Characterize wetland system (e.g., water color is clear, brown, oil film on surface; water quality; general watershed characteristics; etc.). Explain: Identify specific pollutants, if known: (iii) Biological Characteristics. Wetland supports (check all that apply): ❑ Riparian buffer. Characteristics (type, average width): ❑ Vegetation type/percent cover. Explain: ❑ Habitat for: ❑ Federally Listed species. Explain findings: ❑ Fish/spawn areas. Explain findings: ❑ Other environmentally -sensitive species. Explain findings: ❑ Aquatic/wildlife diversity. Explain findings: 3. Characteristics of all wetlands adjacent to the tributary (if any) All wetland(s) being considered in the cumulative analysis: Pick List Approximately acres in total are being considered in the cumulative analysis. For each wetland, specify the following: Directly abuts? (Y/N) Directly abuts? (Y/N) Size (in acres) Y Y Y Y Size (in acres) Wetland C 0.002 Wetland D 0.01 Wetland E 0.05 Wetland G 0.1 Wetland H 0.12 Y Wetland 1 0.03 Y Summarize overall biological, chemical and physical functions being performed: Onsite wetlands and RPW's provide habitat for herpetofauna and macroinvertebrates. The wetlands have the capacity to provide nutrients and organic carbon to downstream foodwebs. Wetlands provide flood storage during rain events and ground water recharge during dry periods. The wetland also traps and filters pollutants before reaching onsite RPWs and Rocky River (TNW). C. SIGNIFICANT NEXUS DETERNIINATION A significant nexus analysis will assess the flow characteristics and functions of the tributary itself and the functions performed by any wetlands adjacent to the tributary to determine if they significantly affect the chemical, physical, and biological integrity of a TNW. For each of the following situations, a significant nexus exists if the tributary, in combination with all of its adjacent wetlands, has more than a speculative or insubstantial effect on the chemical, physical and/or biological integrity of a TNW. Considerations when evaluating significant nexus include, but are not limited to the volume, duration, and frequency of the flow of water in the tributary and its proximity to a TNW, and the functions performed by the tributary and all its adjacent wetlands. It is not appropriate to determine significant nexus based solely on any specific threshold of distance (e.g. between a tributary and its adjacent wetland or between a tributary and the TNW). Similarly, the fact an adjacent wetland lies within or outside of a floodplain is not solely determinative of significant nexus. Draw connections between the features documented and the effects on the TNW, as identified in the Rapanos Guidance and discussed in the Instructional Guidebook. Factors to consider include, for example: • Does the tributary, in combination with its adjacent wetlands (if any), have the capacity to carry pollutants or flood waters to TNWs, or to reduce the amount of pollutants or flood waters reaching a TNW? • Does the tributary, in combination with its adjacent wetlands (if any), provide habitat and lifecycle support functions for fish and other species, such as feeding, nesting, spawning, or rearing young for species that are present in the TNW? • Does the tributary, in combination with its adjacent wetlands (if any), have the capacity to transfer nutrients and organic carbon that support downstream foodwebs? • Does the tributary, in combination with its adjacent wetlands (if any), have other relationships to the physical, chemical, or biological integrity of the TNW? Note: the above list of considerations is not inclusive and other functions observed or known to occur should be documented below: 1. Significant nexus findings for non-RPW that has no adjacent wetlands and flows directly or indirectly into TNWs. Explain findings of presence or absence of significant nexus below, based on the tributary itself, then go to Section IILD: 2. Significant nexus findings for non-RPW and its adjacent wetlands, where the non-RPW flows directly or indirectly into TNWs. Explain findings of presence or absence of significant nexus below, based on the tributary in combination with all of its adjacent wetlands, then go to Section IILD: 3. Significant nexus findings for wetlands adjacent to an RPW but that do not directly abut the RPW. Explain findings of presence or absence of significant nexus below, based on the tributary in combination with all of its adjacent wetlands, then go to Section IILD: D. DETERNIINATIONS OF JURISDICTIONAL FINDINGS. THE SUBJECT WATERS/WETLANDS ARE (CHECK ALL THAT APPLY): 1. TNWs and Adjacent Wetlands. Check all that apply and provide size estimates in review area: ❑ TN W s: linear feet, wide, Or acres. ❑ Wetlands adjacent to TNWs: acres. 2. RPWs that flow directly or indirectly into TNWs. ® Tributaries of TNWs where tributaries typically flow year-round are jurisdictional. Provide data and rationale indicating that tributary is perennial: Perennial RPW Tributaries A and B exhibit geomorphology, hydrology, and biological indicators consistent with perennial flow streams in the piedmont ecoregion. ® Tributaries of TNW where tributaries have continuous flow "seasonally" (e.g., typically three months each year) are jurisdictional. Data supporting this conclusion is provided at Section III.B. Provide rationale indicating that tributary flows seasonally: Seasonal RPW Tributary J exhibits geomorphology, hydrology, and biological indicators consistent with intermittent flowing streams in the piedmont ecoregion. Provide estimates for jurisdictional waters in the review area (check all that apply): ® Tributary waters: 1,075 linear feet 5' wide. ❑ Other non -wetland waters: acres. Identify type(s) of waters: 3. Non-RPWs1 that flow directly or indirectly into TNWs. ❑ Waterbody that is not a TNW or an RPW, but flows directly or indirectly into a TNW, and it has a significant nexus with a TNW is jurisdictional. Data supporting this conclusion is provided at Section III.C. Provide estimates for jurisdictional waters within the review area (check all that apply): ❑ Tributary waters: linear feet, wide. ❑ Other non -wetland waters: acres. Identify type(s) of waters: 4. Wetlands directly abutting an RPW that flow directly or indirectly into TNWs. ® Wetlands directly abut RPW and thus are jurisdictional as adjacent wetlands. ® Wetlands directly abutting an RPW where tributaries typically flow year-round. Provide data and rationale indicating that tributary is perennial in Section IILD.2, above. Provide rationale indicating that wetland is directly abutting an RPW: Wetlands C, D, E, F, G, and H directly abuts onsite Perennial RPW Tributaries with no break in jurisdiction. ® Wetlands directly abutting an RPW where tributaries typically flow "seasonally." Provide data indicating that tributary is seasonal in Section I1I.13 and rationale in Section III.D.2, above. Provide rationale indicating that wetland is directly abutting an RPW: Wetland J directly abuts onsite Intermittent RPW Tributary J with no break in jurisdiction. Provide acreage estimates for jurisdictional wetlands in the review area: 0.23 acres. 5. Wetlands adjacent to but not directly abutting an RPW that flow directly or indirectly into TNWs. ❑ Wetlands that do not directly abut an RPW, but when considered in combination with the tributary to which they are adjacent and with similarly situated adjacent wetlands, have a significant nexus with a TNW are jurisidictional. Data supporting this conclusion is provided at Section III.C. Provide acreage estimates for jurisdictional wetlands in the review area: acres. 6. Wetlands adjacent to non-RPWs that flow directly or indirectly into TNWs. ❑ Wetlands adjacent to such waters, and have when considered in combination with the tributary to which they are adjacent and with similarly situated adjacent wetlands, have a significant nexus with a TNW are jurisdictional. Data supporting this conclusion is provided at Section III.C. Provide estimates for jurisdictional wetlands in the review area: acres. 7. Impoundments of jurisdictional waters.9 As a general rule, the impoundment of a jurisdictional tributary remains jurisdictional. ❑ Demonstrate that impoundment was created from "waters of the U.S.," or ❑ Demonstrate that water meets the criteria for one of the categories presented above (1-6), or ❑ Demonstrate that water is isolated with a nexus to commerce (see E below). E. ISOLATED [INTERSTATE OR INTRA-STATE] WATERS, INCLUDING ISOLATED WETLANDS, THE USE, DEGRADATION OR DESTRUCTION OF WHICH COULD AFFECT INTERSTATE COMMERCE, INCLUDING ANY SUCH WATERS (CHECK ALL THAT APPLY):'" ❑ which are or could be used by interstate or foreign travelers for recreational or other purposes. ❑ from which fish or shellfish are or could be taken and sold in interstate or foreign commerce. ❑ which are or could be used for industrial purposes by industries in interstate commerce. ❑ Interstate isolated waters. Explain: ❑ Other factors. Explain: Identify water body and summarize rationale supporting determination: Provide estimates for jurisdictional waters in the review area (check all that apply): ❑ Tributary waters: linear feet, wide. ❑ Other non -wetland waters: acres. Identify type(s) of waters: ❑ Wetlands: acres. 'See Footnote # 3. 9 To complete the analysis refer to the key in Section III.D.6 of the Instructional Guidebook. 10 Prior to asserting or declining CWA jurisdiction based solely on this category, Corps Districts will elevate the action to Corps and EPA HQ for review consistent with the process described in the Corps/EPA Memorandum Regarding CWA Act Jurisdiction Following Rapanos. NON -JURISDICTIONAL WATERS, INCLUDING WETLANDS (CHECK ALL THAT APPLY): ❑ If potential wetlands were assessed within the review area, these areas did not meet the criteria in the 1987 Corps of Engineers Wetland Delineation Manual and/or appropriate Regional Supplements. ❑ Review area included isolated waters with no substantial nexus to interstate (or foreign) commerce. ❑ Prior to the Jan 2001 Supreme Court decision in "SWANCC," the review area would have been regulated based solely on the "Migratory Bird Rule" (MBR). ❑ Waters do not meet the "Significant Nexus" standard, where such a finding is required for jurisdiction. Explain: ❑ Other: (explain, if not covered above): Provide acreage estimates for non -jurisdictional waters in the review area, where the sole potential basis of jurisdiction is the MBR factors (i.e., presence of migratory birds, presence of endangered species, use of water for irrigated agriculture), using best professional judgment (check all that apply): ❑ Non -wetland waters (i.e., rivers, ❑ Lakes/ponds: acres. ❑ Other non -wetland waters: ❑ Wetlands: acres. streams): linear feet, wide. acres. List type of aquatic resource: Provide acreage estimates for non -jurisdictional waters in the review area that do not meet the "Significant Nexus" standard, where such a finding is required for jurisdiction (check all that apply): ❑ Non -wetland waters (i.e., rivers, streams): linear feet, wide. ❑ Lakes/ponds: acres. ❑ Other non -wetland waters: acres. List type of aquatic resource: ❑ Wetlands: acres. SECTION IV: DATA SOURCES. A. SUPPORTING DATA. Data reviewed for JD (check all that apply - checked items shall be included in case file and, where checked and requested, appropriately reference sources below): ® Maps, plans, plots or plat submitted by or on behalf of the applicant/consultant: Figure No. 1 Dated 09/09/2016 ® Data sheets prepared/submitted by or on behalf of the applicant/consultant. ® Office concurs with data sheets/delineation report. ❑ Office does not concur with data sheets/delineation report. ❑ Data sheets prepared by the Corps: ❑ Corps navigable waters' study: ❑ U.S. Geological Survey Hydrologic Atlas: ❑ USGS NHD data. ❑ USGS 8 and 12 digit HUC maps. ® U.S. Geological Survey map(s). Cite scale & quad name: Figure No. 3 1:24,000 Cornelius Dated 04/08/2016 ® USDA Natural Resources Conservation Service Soil Survey. Citation: Figure No. 4 Soil Survey of Mecklenburg County Dated 04/08/2016 and Figure No. 5 Soil Survey of Mecklenburg County Dated 09/06/2016 ❑ National wetlands inventory map(s). Cite name: ❑ State/Local wetland inventory map(s): ❑ FEMA/FIRM maps: ❑ 100-year Floodplain Elevation is: (National Geodectic Vertical Datum of 1929) ® Photographs: ® Aerial (Name & Date): Figure No. 2 Dated 09/06/2016 or ® Other (Name & Date): ❑ Previous determination(s). File no. and date of response letter: ❑ Applicable/supporting case law: ❑ Applicable/supporting scientific literature: ® Other information (please specify): Figure No. 7 Dated 09/06/2016 and Figure No. 8 Dated 08/23/2016, B. ADDITIONAL COMMENTS TO SUPPORT JD: a-J L O Q oC r. Threatened & Endangered Species Report Wetlands and Environmental Planning Group Leonard S. Rindner, PLLC. Threatened / Endangered / Protected Species Evaluation Charlotte Office: 10512-0 Providence Rd. PMB 550 Charlotte, NC 28277 (704)404-2277 len.rincIner@Dwetlands-epg.com For: Vermillion Village HUNTERSVILLE Mecklenburg County, North Carolina By: Lisa R. Gaffney, Biologist Field investigation October 8, 2021 ..: w.wetlands-epg.Cr, Asheville ❑ffice: 1070 Tunnel Rd., Bldg, I Suite 10, PMB 283 Asheville, NC 28805 Vermillion Village - Threatened /Endangered /Protected Species Evaluation GENERAL LANDSCAPE DESCRIPTION: This +/- 29.43 acre site is in a semi -urban setting located just south of 4th Street, southwest of Glendale Drive, east of N. Church Street, and north of Huntersville- Concord Road, in Huntersville, Mecklenburg County, North Carolina. There is a disturbed former industrial site on the northern portion and wooded slopes on the southern portion. The site can be found on the Cornelius USGS Topographic Quadrangle Map; latitude is 35.4149 ON, longitude is-80.8381 °W. The elevation is approximately 750-800 ft. (Figures 1-4). Figure 1: Wetlands and Environmental Planning Group Leonard S. Rindner, PLLC. Vermillion Village - Threatened /Endangered /Protected Species Evaluation METHODOLOGY: The US Fish and Wildlife Service website https://ecos.fws.gov/ipac/location/J IFLVGS47FDKRG5TCWPQV5ZI64/resources was referenced to determine the occurrence of Threatened, Endangered and Protected species for Mecklenburg County, North Carolina, the results of which are listed below (Table 1). Maps and aerial photographs were assembled, and the site was investigated on October 8, 2021 Table 1: Threatened / Endangered / Protected Species listed for Mecklenburg County County: Mecklenburg, NC *Source: US Fish & Wildlife Service **Data search on October 8, 2021 Group Name Status Vascular Plants Schweinitz's Sunflower (Helianthus Endangered sch weinitzii ) Vascular Plants Smooth Coneflower (Echinacea Endangered laevi ata Vascular Plants Michaux's Sumac (Rhus michauxii) Endangered Vertebrate Northern Long -Eared Bat (MVotis Threatened septentrionalis) Invertebrate Carolina Heelsplitter (Lasmigona Endangered decorata Vertebrate Bald Eagle (Haliaeetus Protected under the Bald leucocephalus) and Golden Eagle Protection Act WEPG400969 3 Wetlands and Environmental Planning Group Vermillion Village - Threatened /Endangered /Protected Species Evaluation SPECIES DESCRIPTIONS: Three plant species with federal protection are listed as potentially occurring in Mecklenburg County: • Schweinitz's Sunflower (Helianthus schweinitzii), listed as Federally Endangered, is typically found in open habitats which historically have been maintained by wildfires and grazing bison and elk herds. Now most occurrences are limited to roadsides, woodland and field edges, and utility rights -of -way (ROVV). • Smooth Coneflower (Echinacea laevigata), listed as Federally Endangered, is typically found in open woods, cedar barrens, roadsides, clear cuts, dry limestone bluffs and power line rights -of -way, requiring abundant sunlight and little competition from other plant species. • Michaux's Sumac (Rhus michauxii), listed as Federally Endangered, requires habitat of sandy forests and woodland edges. This species requires periodic fire as a part of its ecology. Three animal species with federal protection are listed as potentially occurring in Mecklenburg County: • Bald Eagle (Haliaeetus leucocephalus), protected by the Bald and Golden Eagle Protection Act, typically inhabits forested areas near large bodies of open water such as lakes, marshes, seacoasts and rivers, where there are suitable fish populations and tall trees for nesting and roosting. • Carolina Heelsplitter (Lasmigona decorata), listed as Federally Endangered, is restricted to cool, clean, well -oxygenated water. Stable, silt- free stream beds are required for this species. Typically, stable areas occur where the stream banks are well -vegetated with trees and shrubs. Northern Long-eared Bat (Myotis septentrionalis), listed as Federally Threatened. During summer, northern long-eared bats roost singly or in colonies underneath bark, in cavities, or in crevices of both live and dead trees. Males and non - reproductive females may also roost in cooler places, like caves and mines. It has also been found, rarely, roosting in structures like barns and sheds. Northern long-eared bats spend winter hibernating in caves and mines, called hibernacula. Wetlands and Environmental Planning Group 4 Leonard S. Rindner, PLLC. Vermillion Village - Threatened /Endangered /Protected Species Evaluation RESULTS: The site is in a semi -urban setting in the town of Huntersville. There is a disturbed former industrial site on the northern portion and wooded slopes on the southern portion. There is a tank tower remaining on the former industrial portion as well as old building foundations, slabs, stockpiles, and the perimeter is laced with old roads and trails. Much of the area is overgrown with a scrub/shrub community dominated by young pines and hardwood saplings including Shortleaf Pine (Pinus echinata), Virginia Pine (P. virginiana), Winged Elm (Ulmus alata), Eastern Red Cedar (Juniperus virginiana), Broomsedge (Andropogon virginicus), Dog -fennel (Eupatorium capillifolium), Groundsel tree (Baccharis halimifolia), Goldenrod (So/idago sp.), and Sericea Lespedeza (Lespedeza cuneata). Tree species present on the slope include Willow Oak (Quercus phellos), White Oak (Quercus alba), Post Oak (Q. stellata), Mockernut Hickory (Carya tomentosa), Pignut Hickory (Carya glabra), Tulip Poplar (Liriodendron tulipifera), Sweetgum (Liquidambarstyraciflua), American Elm (Ulmus americana), Red Maple (Acer rubrum), Green Ash (Fraxinus pennsylvanica), Cottonwood (Populus deltoides), River Birch (Betula nigra), Box -elder Maple (Acer negundo), and Black Walnut (Juglans nigra). Shrubs present are Chinese Privet (Ligustrum sinense), Elderberry (Sambucus canadensis), Giant Cane (Arundinaria gigantea), and Tag Alder (Alnus serrulata). Vines include Kudzu (Pueraria lobata), Japanese Honeysuckle (Lonicera japonica), Catbrier (Smilax sp.), Trumpet Creeper (Campsis radicans), and Poison Ivy (Toxicodendron radicans). The herbaceous layer is dominated by Japanese Stilt Grass (Microstegium vimineum) and includes Panic Grass (Panicum sp.), Christmas Fern (Polystichum acrostichoides), Ground Ivy (Glechoma hederacea), and River Oats (Chasmanthium latifolium). The transitional areas and roadside habitat along 4t" Street, N Church Street, Huntersville Concord Road, and Glendale Road had been recently mowed and in areas with overhead power lines, herbicide had been applied. Vegetation observed includes Fescue (Festuca sp.), Broomsedge (Andropogon virginiana), Wingstem (Verbesina sp.), Goldenrod (So/idago sp.), Sericea Lespedeza (Lespedeza cuneata), Johnson Grass (Sorghum halepense), Poke Weed (Phytolacca americana), Nightshade (Solanum sp.), Curly Dock (Rumex crispus), Tickseed (Bidens spp.), and Pigweed (Amaranthus hybridus). WEPG400969 Wetlands and Environmental Planning Group Vermillion Village - Threatened /Endangered /Protected Species Evaluation Threatened & Endangered/Protected Species Results • All potential habitats for Schweinitz's Sunflower along the roadsides, utility rights -of -way, transitional areas and woods edges were examined, and the species was not observed. WEPG concludes Schweinitz's Sunflower (Helianthus schweinitzii) does not occur on the site. • All potential habitats for Smooth Coneflower along the roadsides, utility rights -of -way, transitional areas and woods edges were examined, and the species was not observed. WEPG concludes Smooth Coneflower (Echinacea laeyigata) does not occur on the site. • All potential habitats for Michaux's Sumac along the roadsides, utility rights -of -way, transitional areas and woods edges were examined, and the species was not observed. WEPG concludes Michaux's Sumac (Rhus michauxii) does not occur on the site. • No habitat exists on the site for Bald Eagles. WEPG concludes Bald Eagle (Haliaeetus leucocephalus) does not occur on the site. • Based on existing documentation, Carolina Heelsplitter populations have not been identified within this basin. WEPG concludes Carolina Heelsplitter (Lasmigona decorata) does not occur on the site. • Comparing this site location to the USFWS Asheville office's website (http-//www.fws.gov/asheville/htmls/project review/NLEB_in_WNC.htm I) WEPG concludes the site meets the "exempt_" criteria which requires no further action under section 7 of the Endangered Species Act for the Northern Long-eared Bat. RECOMMENDATIONS: Based on the site investigation and the review of available data, WEPG did not identify any protected species occurring on the subject property. No further investigation of the presence of protected species on the site is recommended at this time. Respectfully submitted, 04z,el # 1*e�l Lisa R. Gaffney Biologist October 12, 2021 on Wetlands and Environmental Planning Group Vermillion Village - Threatened /Endangered /Protected Species Evaluation Curriculum Vitae for: Lisa R. Gaffney Biologist/ Botanist B.S. Biology, University of North Carolina at Charlotte Ms. Gaffney is a classically trained botanist and natural resource biologist and has conducted field work and investigative studies covering thousands of cumulative acres in both North and South Carolina since 1996, including: • Discovered Schweinitz's Sunflower at Redlair Farm in Gaston County, NC. which led to the purchase of the site by the State of North Carolina Plant Conservation Program, now called Redlair Preserve. This population has become a Recovery Site for the species. • Located and identified numerous previously unreported populations of Federally Endangered Schweinitz's Sunflower (Helianthus schweinitzii). • Located and identified numerous previously unreported populations of Threatened Dwarf Heartleaf (Hexastylis naniflora). • Cabarrus County NC Natural Heritage Inventory. Organized, directed, and conducted field survey of natural areas in Cabarrus County for the North Carolina Natural Heritage Program. • Lincoln County NC Natural Heritage Inventory. Organized, directed, and conducted field survey of natural areas in Lincoln County for the North Carolina Natural Heritage Program. • Threatened and Endangered Species Surveys and Natural Communities Evaluation for over 55,000 acres in North and South Carolina, 1996 - present. • Participated in numerous Piedmont Prairie restoration projects in both North and South Carolina. Wetlands and Environmental Planning Group Leonard S. Rindner, PLLC. Vermillion Village - Threatened /Endangered /Protected Species Evaluation Figure 2: VICINITY MAP Hunrersrrl le p Mobile Auto 2452 k Church St herw00d Qr 715 Ile ARP Church 4 s452 m x Y s s American Legion 19 Murto Made Distillery Mini 9 10 Hubbard's Cupboards 19 $ Fixtures Sparrows �.P nn P t'" st a d v c t %4 flO,,1 Yappy Hour Bakery Mobile boutique an 9 Harvey's F mFree Delivery on t st order 4°4,1 okd Vermillion Or 24" Pamela H. Bowman Park N _ 199 Main Street Coffee Coworkinq 11�117 •tip""r Aurea: VERMILLION VILLAGE Prepared For:IWEPG +f- 29.43 Mecklenburg Co., NC BOWMAN QEVELOPMENT FIGURE 2 VICINrrY MAP Drawn By Reviewed By: 08124121 Subject to USACE/NCDEa vmficotron gLK ALL Wetlands and Environmental Planning Group Leonard S. Rindner, PLLC. Vermillion Village - Threatened /Endangered /Protected Species Evaluation Figure 3: AERIAL MAP Wetlands and Environmental Planning Group Leonard S. Rindner, PLLC Vermillion Village - Threatened /Endangered /Protected Species Evaluation Figure 4: NRCS SOIL MAP PROTECT 60UNDARY CeB 2 STUDY LIMITS r ■ N FNRC—SI Soil Survey Manuscript cklenburg County 1980 Map Unit Symbol Asap Unit Name Acres in Api Percent of Apt CeB2 Cecil sandy clay loam. 2 to 8 11.1 37.2% Percent slopes, moderately eroded CeD2 Cecil sandy clay loam, 8 to 15 11 1 37 4% percent slopes, moderately eroded CUB Cecit-Urban land complex. 2 to 7.6 25.4 8 percent slopes Tools foe Area of Interest 100 29.8 Acres, t/- 29.43 VERMILLION VILLAGE Prepared for: BOWMAN DEVELOPMENT EPG FIGURE Mecklenburg Co., NC SOIL SURVEY MANUSCRIPT MAP 4 Drawn By: Reviewed By: 08/24/21 Subject to USACEINCOEQ verification BLK Wetlands and Environmental Planning Group Leonard S. Rindner, PLLC. L.S United States Department of the Interior F'%`S VI EI.IFF. FISH AND WILDLIFE SERVICEu�J,lj Asheville Field Office §'� 160 Zillicoa Street b ' Asheville, North Carolina 28801 March 30, 2022 Lisa Gaffney WEPG 10612-D Providence Road PMB 550 Charlotte, North Carolina 28277 lisa. ag ffneygwetlands-ep com Subject: Anchor Mill (Vermillion Village) Residential Development; Mecklenburg County, North Carolina Dear Lisa Gaffney: The U.S. Fish and Wildlife Service (Service) has reviewed the information provided in your correspondence dated March 1, 2022, wherein you solicit our comments regarding project - mediated impacts to federally protected species. We submit the following comments in accordance with the provisions of the Fish and Wildlife Coordination Act, as amended (16 U.S.C. 661-667e); the National Environmental Policy Act (42 U.S.C. §4321 et seq.); and section 7 of the Endangered Species Act of 1973, as amended (16 U.S.C. 1531-1543) (Act). Project Description According to the information provided, the Applicant proposes to construct a residential development and appurtenances on approximately 29 forested acres in Huntersville, North Carolina. The information provided suggests that the proposed project will require authorization from the U.S. Army Corps of Engineers for unavoidable impacts to Waters of the United States. No project design plans or a description of impacts to onsite habitats have been prepared or provided at this time. Federally Listed Endangered and Threatened Species According to Service records, suitable summer roosting habitat may be present in the action area (50CFR 402.02) for the federally threatened northern long-eared bat (Myotis septentrionalis). However, the final 4(d) rule, (effective as of February 16, 2016) exempts incidental take of northern long-eared bat associated with activities that occur greater than 0.25 miles from a known hibernation site, and greater than 150 feet from a known, occupied maternity roost during the pup season (June 1 — July 31). Based on the information provided, the project would occur at a location where any incidental take that may result from associated activities is exempt under the 4(d) rule for this species. Although not required, we encourage the Applicant to avoid any associated tree clearing activities during this animal's pup season, maternity roosting season (May 15 — August 15) and/or active season (April 1 — October 15). If adhered to, a tree clearing moratorium would also support our concurrence with a "may affect, not likely to adversely affect" determination from the action agency for this animal. Your correspondence indicates that suitable habitat is present onsite for the federally endangered Schweinitz's sunflower (Helianthus schweinitzii), smooth coneflower (Echinacea laevigata) and Michaux's sumac (Rhus michauxii). However, targeted botanical surveys conducted during the appropriate timeframe (October 8, 2021) did not detect evidence for these species at that time. Based on the information provided, we believe that the probability for inadvertent loss of these plant species is insignificant and discountable and we would concur with "may affect, not likely to adversely affect" determinations from the action agency for these species. Botanical survey results are valid for two years for the purposes of consultation under the Act: https://www.fws. gov/asheville/pdfs/Optimal%20 Survey%20Windows%20for%20listed%20plant s%202020.pdf Based on the information provided, we believe that suitable habitats do not occur onsite for any other federally protected species, and we require no further information at this time. Please be aware that obligations under section 7 of the Endangered Species Act must be reconsidered if: (1) new information reveals impacts of this identified action that may affect listed species or critical habitat in a manner not previously considered, (2) this action is subsequently modified in a manner that was not considered in this review, or (3) a new species is listed or critical habitat is determined that may be affected by the identified action. Erosion and Sediment Control Measures to control sediment and erosion should be installed before any ground -disturbing activities occur. Grading and backfilling should be minimized, and existing native vegetation should be retained (if possible) to maintain riparian cover for fish and wildlife. Disturbed areas should be revegetated with native vegetation as soon as the project is completed. Ground disturbance should be limited to what will be stabilized quickly, preferably by the end of the workday. Natural fiber matting (coir) should be used for erosion control as synthetic netting can trap animals and persist in the environment beyond its intended purpose. Impervious Surfaces and Low -Impact Development Increased storm -water runoff also degrades aquatic and riparian habitat, causing stream -bank and stream -channel scouring. Impervious surfaces reduce groundwater recharge, resulting in even lower than expected stream flows during drought periods, which can induce potentially catastrophic effects for fish, mussels, and other aquatic life. Accordingly, we recommend that all new development, regardless of the percentage of impervious surface area they will create, implement storm -water -retention and -treatment measures designed to replicate and maintain the hydrograph at the preconstruction condition to avoid any additional impacts to habitat quality within the watershed. We recommend the use of low -impact -development techniques, such as reduced road widths, grassed swales in place of curb and gutter, rain gardens, and wetland retention areas, for retaining and treating storm -water runoff rather than the more traditional measures, such as large retention ponds, etc. These designs often cost less to install and significantly reduce environmental impacts from residential development. Where detention ponds are used, storm -water outlets should drain through a vegetated area prior to reaching any natural stream or wetland area. Detention structures should be designed to allow for the slow discharge of storm water, attenuating the potential adverse effects of storm -water surges; thermal spikes; and sediment, nutrient, and chemical discharges. Also, because the purpose of storm -water -control measures is to protect streams and wetlands, no storm -water -control measures or best management practices should be installed within any stream (perennial or intermittent) or wetland. The Service appreciates the opportunity to provide these comments. Please contact Mr. Byron Hamstead of our staff at byron_hamstead@fws.gov if you have any questions. In any future correspondence concerning this project, please reference our Log Number 4-2-22-496. Sincerely, - - original signed - - Janet Mizzi Field Supervisor a-J L O Q oC u O V) oC c� Cultural Resources Report R.S. Webb & Associates Cultural Resource Management Consultants 2800 Holly Springs Parkway, Suite 200 • P.O. Drawer 1319 Holly Springs, Georgia 30142 Phone: 770-345-0706 • Fax: 770-345-0707 April 6, 2022 Mr. Heath Caldwell Leonard S. Rindner, PLLC Wetlands & Environmental Planning Group 3714 Spokeshave Lane Matthews, North Carolina 28105 Subject: Findings - Cultural Resources Literature Review Vermillion Village Development Tract Huntersville, Mecklenburg County, North Carolina R.S. Webb & Associates No. 22-649-173 Dear Mr. Caldwell: BACKGROUND During March 2022, R.S. Webb & Associates (RSWA) conducted a cultural resources literature review for the Vermillion Village development tract in Huntersville, Mecklenburg County, North Carolina. The project area covers approximately 29 acres located east of North Church Street and northwest of Huntersville-Concord Road, between Second and Fourth Street, in northern Mecklenburg County (Figure 1). For this study, a cultural resource is defined as a discrete area of human activity that is at least 50 years old. Cultural resources include, but are not limited to, archeological sites, historic structures, military earthworks, mines/mining features, historic cemeteries, and historic landscape features. The purpose of the current study was to determine if previously recorded cultural resources are located within the project area. METHODOLOGY Through the State Historic Preservation Office's (SHPO) HPOWEB database, information was reviewed regarding National Register of Historic Places (NRHP) properties, Mecklenburg County surveyed -only historic resources, local landmarks, state study -list sites and historic resources determined by the SHPO to be eligible for the NRHP. The North Carolina Office of State Archaeology (OSA) provided RSWA with information via email regarding archeological sites within 1.6 kilometers (km) (1.0 mile) of the project area. This information included site forms, location maps and partial or full reports. Historic county maps were examined online through North Carolina Maps, a collaboration of the University of North Carolina, the State Archives of North Carolina, and the Outer Banks History Center. Historic aerial photography and additional historic maps were accessed through Historicaerials.com, Earthexplorer.usgs.gov, Legacy.lib.utexas.edu/maps/, and/or Alabamamaps.ua.edu. The following primary sources were found to be useful in searching for historic resources within and adjacent to the project area: Findings - Cultural Resources Literature Review, Vermillion Village Development Tract Page 2 April 6, 2022 • 1910 USDA Soil Map of Mecklenburg County • 1911 County Commissioner's Map of Mecklenburg County • 1912 Rural Delivery Map of Mecklenburg County • 1938 and 1969 State Highway and Public Works Commission Map of Mecklenburg County • 1956, 1965, 1968, 1978, and 1983 aerial photographs of Mecklenburg County • 1970 and 1993 USGS Cornelius, NC 7.5-Minute quadrangle • 1993-2021 Google Earth aerial photography. RESULTS Previous Archeological Investigations: A review of OSA archeological survey and site location data indicates one archeological investigation within 1.0 km of the project area. In 2002, an archeological survey was undertaken for a proposed commuter rail system that included 11 new station sites located along an existing rail corridor (Luchsinger et al. 2005). Survey of the Huntersville station site was located approximately 350 m southwest of the project area (Figure 1); the study identified one archeological site. Previous Architecturallnvestigations: According to SHPO personnel, the North Carolina HPOWEB database is the definitive source of architectural survey information for Mecklenburg County. In 2015, a limited architectural survey was conducted along Main Street in Huntersville, ahead of local road work (van den Hurk and Bamann 2016). A number of historic resources were identified near the current study tract (Figure 1). National Register of Historic Places: There is one NRHP-listed historic property within 1.0 km of the current study tract. The John F. Ewart Farm, listed in the NRHP in 1991, is situated south of Huntersville-Concord Road, approximately 930 m and more southeast of the study tract. The house associated with this propertywas moved to the north side Huntersville-Concord Road, approximately 1.1 km southeast of the study tract. The associated set of farm outbuildings appears to have been moved elsewhere or lost altogether, as this NRHP-listed historic farm property was re -developed circa 2007. A 1991 NRHP documentation form established a historic context to guide the future nomination of properties related to rural Mecklenbug County history, but this document is not formal nomination of any specific historic property. The document included discussion of the circa 1896 Anchor Mill building in Huntersville (no longer present) as a quintessential example of a small-town industrial building and set standards for the eligibility of individual houses and residential districts in rural areas and small towns (Mattson and Huffman 1990). Mecklenburg County Historic Resources: The HPOWEB database identifies eight Determined Eligible historic properties (DE), three Study List sites (SL), five Local Landmark properties (LL), one potential historic district (not eligible), and no fewer than 80 surveyed -only historic properties (SO) within 1.0 km of the project area. Within the study tract, Anchor Mill (Resource No. MK1344) was added to the Study List in 2000, but the mill building was reportedly gone as of 2004, per the HPOWeb database (Figure 1). No other SL properties are within 600 m of the project area. The closest resource among the group of the DOE or Local Landmark historic properties is Resource No. MK1342 (Huntersville Associate Reformed Presbyterian Church and Cemetery) situated southwest of the intersections of Main Street and Bingham Street, approximately 40 m west of the project area Findings - Cultural Resources Literature Review, Vermillion Village Development Tract Page 3 April 6, 2022 (Figure 1). No other DOE or Local Landmark properties are within 350 m (southwest) of the study tract. The 2015 architectural survey along Main Street (van den Hurk and Bamann 2016) included assessment of three previously recorded historic resources adjacent to the current study tract (Figure 1; Nos. MK3556, MK3558 and MK3560) and identified/assessed seven additional resources adjacent to the project area (Figure 1; Nos. MK3579-MK3581 and MK3588-MK3590). This survey also included a collective assessment of Anchor Mill in the project area and its "mill village" as a district of resources both recorded and unrecorded (Resource No. MK1344). The village component, or worker housing area, is composed of at least 28 buildings near or immediately adjacent to the current study tract (i.e. along Church Street, Main Street, and 3rd Street, and 4t' Street); the district was determined ineligible in 2006 and 2015, per the 2016 survey report and SHPO concurrence (van den Hurk and Bamann 2016). Recorded Archeological Sites: OSA data indicate that one recorded archeological site, 31MK1074, is within 1.0 km of the project area (Figure 1). This site was found during the above -noted Luchsinger et al. survey (2005) and is a disturbed scatter of 19t' and 20" century domestic artifacts recommended ineligible for the NRHP in 2004. Revolutionary War Actions: There were at least five reported Revolutionary War military engagements in Mecklenburg County, the closest of which was the Battle of the Bees (8.7 km southwest) on October 3, 1780. The brief battle was fought between British Provincial troops and cavalry, foraging northward during the occupation of Charlotte, and two regiments of Patriot militia supported by a group of 13 area farmers. The British armies eventually evacuated Charlotte to the southwest, were reinforced in South Carolina, and then moved west to northeast, skirmishing during early February 1781 at Cowan's Ford (10 km northwest) and at Tarrant's Tavern in Iredell County (12 km north) (Lewis 2021). Civil WarActions/Features: Review of the official military atlas of the Civil War (Davis et al. 1983), revealed that no significant Civil War military activity occurred in present-day Mecklenburg County, North Carolina. Union General William T. Sherman, following the capture of Columbia, South Carolina on February 17, 1865, moved north to the vicinity of Kershaw, Lancaster County, South Carolina (97 km southeast), whence his armies turned northeast and moved toward Laurel Hill and Fayetteville, North Carolina, thus bypassing the project region (Davis et al. 1983). Historic Cemeteries: The USGS topographic maps reviewed show three large cemeteries within within 360 m of the study tract (Figure 1). The closest cemetery, associated with Huntersville Associate Reformed Presbyterian Church, are part of the previously mentioned DOE Resource No. MK1342 and is approximately 40 m west of the project area. Historic Railroad. The Atlantic, Tennessee and Ohio Railroad was chartered in 1855 and its rail was established from Charlotte to Statesville by 1863. The entire length of rail was soon removed and used to replace rails that were elsewhere destroyed during the war. The rail line was re-established on the old road bed in 1871 and it remains active through Huntersville today (Robie 2018). Historic rail corridors may be eligible for the NRHP, but almost all historical significance is contained within rail corridor rights -of -way. Findings - Cultural Resources Literature Review, Vermillion Village Development Tract Page 4 April 6, 2022 Structures on Historic Maps and Aerial Photographs: The earliest available maps of Mecklenburg County (1910-1912) show a building in the northwestern section of the study tract (probably the circa 1896 Anchor Mill) and road corridors to the west, north, and south that were all lined by numerous buildings; no buildings were shown along Glendale Drive (northeast). The current course of Huntersville-Concord Road (southeast) did not appear on early 20' century maps (its pre -cursor route was located further south). The current road alignment appeared on highway maps from 193 8 and 1969; these maps do not include individual features within the boundaries of incorporated places such as Huntersville. The 1970 and 1993 USGS topographic maps shows mill -related buildings, an elevated water tank and numerous mill village -related buildings closely associated with the mill complex (Figure 1) Aerial photographs from 1956 thourgh 1998 show little change in developments located north and west of the study tract, or along 3rd Street to the southwest. The 1956 aerial shows Steel Street passing north from 3rd Street into the study tract with eight dwellings along its course (Figure 1). The number of buildings present along this road was two by 1968; by 1978, no buildings were present. Development along Glendale Drive adjacent to the northeastern study tract boundarywas very sparse through 1983 (one building north of the road), but both sides of the road were lined with buildings by 1998. Along Huntersville-Concord Road to the southeast, development was sparse to the east of the road prior to 1998, when clearing for modern development was ongoing. No buildings appeared west of the road, in or near the study tract, on historic aerial photographs. Google Earth aerial photography from 2004 and 2005 chronicle the complete demolition of Anchor Mill and the extent of environmental remediation activities within the mill complex/project area. More recent aerials (2018-2021) indicate significant reforestation of the study tract. CONCLUSIONS No NRHP-listed properties are recorded within or near the project area. Likewise, no recorded determined -eligible properties, designated local landmarks, archeological sites or cemeteries are located within the study tract. The project area lies within a portion of one state study -list property, Resource No. MK1344 (Anchor Mill and mill village). This potential historic district was added to the study list in 2000; however, the mill buildings were razed in 2004 as part of an environmental remediation project, and in 2015 the associated mill village was determined ineligible for the NRHP, per the HPOWeb database. Excluding buildings associated with Anchor Mill (Resource No, MK1344), the closest recorded NRHP-eligible property to the study tract is Resource No. 1342 (Huntersville Associate Reformed Presbyterian Church and Cemetery), about 40 m to the west. There are many historic buildings, some individually recorded, located near the northern, western and southern study tract boundaries, all of which were determined ineligible for the NRHP, either individually in 2006, or collectively in 2015. Historic maps and aerial photographs indicate stability in the occupation and use of the study tract and its immediate environs during the 20' century and into the early 2000s. A road and a number of dwellings present in the study tract through 1956 were no longer present by 1978 and, conversely, residential development east and southeast of the study tract did not occur until after 1983. Findings - Cultural Resources Literature Review, Vermillion Village Development Tract April 6, 2022 Page 5 CLOSING COMMENTS Mr. Caldwell, we appreciate the opportunity to work with you on this project. If you have any questions or comments, please contact me at 770-345-0706. Sincerely, R.S. WEBB & ASSOCIATES fl i" Neil J. owen Historian Attachments: Figure 1 kai yur Robert S. (Steve) Webb President and Senior Principal Archeologist REFERENCES Davis, G.B., L. J. Perry and J. W. Kirkley, compiled by C. D. Cowles 1983 Atlas to Accompany the OfficialRecords ofthe Union and ConfederateArmies. Reprint of the 1891-1895 edition. The Fairfax Press, New York. Lewis, J.D. 2021 The American Revolution in North Carolina. Internet -Online. Found at: http://www.carolana.com /NC/Revolution/home.html. Accessed February 2022. Luchsinger, H., T. Baliey, L. Lautzenheiser, and B. Hall 2005 Archaeological Survey of the Proposed North Corridor Commuter Rail Project (NCCR), Charlotte Area Transit System, Charlotte, North Carolina. Coastal Carolina Research. Tarboro, North Carolina. Mattson, R. and W. Huffman 1990 Historic and Architectural Resources of Rural Mecklenburg County, North Carolina. Charlotte, North Carolina. Robie, D. 2018 "AT&O - Statesville to Charlotte". West Virginia and North Caroline Rails. Online Document. Found at: https://www.wvncrails.org/ato-statesville-to-charlotte.html. Accessed April 1, 2022. van den Hurk, J. and S.E. Bamann 2016 Architectural Survey, Roadway Improvements, N.C. 115, N. Main Street, S. Main Street, and Gilead/Huntersville-Concord Road, Town of Huntersville, Meckelnburg County, North Carolina. Coastal Carolina Research. Tarboro, North Carolina. hSch Stre)t� A Structure on Historic Maps and Aerial ❑ Recorded Historic Resource • Recorded Archeological Site =Previous Cultural Resource Project --- Road on Historic Maps and Aerials Map Reference: 7.5-Minute USGS Quadrangle Scale Cornelius, North Carolina (1993) 0 198 meters 0 650 feet Figure 1 Project Area, Previous Projects and Cultural Resources Location Map Engineering I Design I Planning I Construction Management Attachment 2: Proposed Culvert and Impacts Exhibit www.gpinet.com Engineering I Design I Planning I Construction .4 oe / CD CD LO � II I • wo e ,I I �1 SNEUX3 W In40,0 I � H W p .. z W w ziu1101 I o �o O O N H H Z C- I 2E Q U '� UJ 2EH W OU < X g W = Q w W F � Lj � � W z N 0 W C, W > Z 0 U O W D Z W 0 U W D �ao< o W \ 0 0_ N U)W O U z QLu / U)Q U F co U) / 2E 0_ LO 0_ / J H D I O oa. r w U ,t`.e;etlitl JM I.L cV SS- L LJ LU m 5; 2 UwJ 0. w e uwi Z w f n F-- V Oa LU L� WJ CO Lu F— > _ � i<Z U> W O D U) ~ i = W W J 2 Z >2 F--D JEo= U ; z LU ELEVATIONN k a` m W W > '•�y N > W O W J 0 OO yip )tft1E1oN j w LL a° UW + rnU p o N :? a� gw U J m --- D m U p Z o O H U W co H of w W > o Q o cUnoo U o� aQ WOO C7 w u n w >�H a o U W D X� H > U w co o w o a + 0 0 0 0 (O In M ELEVATION 0 Lo + N i2 ° w Wco CD � O W Z w CD W w W � > � � N U W� q L U Q Z O o o U W co z w ~ Ur H > OW Q LU L Z U o Z J �z ) w%�W w 2 �Q XZ C> N w O Q ° ~ = W Uw o WJ2Z L o D w O 2 U z > Engineering I Design I Planning I Construction Management Attachment 3: Proposed Culvert Extension Hydraulic and Hydrologic Analysis www.gpinet.com Engineering I Design I Planning I Construction Hydrologic and Hydraulic Analysis for Vermillion Village Culvert Extension Anchor Mill Mixed Use Development 404 North Church Street Huntersville, NC 28078 August 29, 2023 4L (i, i4p6eCC0. Ls++°ffe4 J r �a wr i w! EA. L v i w Prepared by: Commercial Site Solutions, Inc. Engineering • Site Planning 402 East 1st Avenue Easley, SC 29640 864-855-5200 TABLE OF CONTENTS I. Narrative.................................................................................. 1 FEMA Informations............................................................... 1 Site Soil Information.............................................................. 1 II. Pre -Developed Hydrology.............................................................2 Curve Number and Basin Characteristics ................................... 2 Time of Concentration............................................................ 2 Rainfall Amounts................................................................... 2 Runoff Calculations................................................................2 III. Post -Developed Hydrology........................................................... 3 Curve Number and Basin Characteristics ................................... 3 Time of Concentration............................................................ 3 Rainfall Amounts................................................................... 4 Runoff Calculations................................................................4 IV. Culvert Hydraulic Evaluation.........................................................5 Culvert Observations..............................................................5 Culvert Hydraulics Calculations ................................................ 5 Conclusion........................................................................... 5 APPENDICES Appendix A......... Maps, Tables and Figures Site Location Map USGS Map Floodway / FEMA Maps Soils Map and Table Curve Number Charts Charlotte -Mecklenburg Stormwater Design Manual Rainfall Table Appendix B......... Pre -Development Calculations Pre -Development Drainage Area Map Offsite Drainage Area Map Pre -Development Hydrographs Report Pre -Developed Conditions Culvert Profile Appendix C......... Post -Development Calculations Post -Development Drainage Area Map Offsite Drainage Area Map Post -Development Hydrographs Report Post -Developed Conditions Culvert Profile Appendix D......... Site Photographs I. NARRATIVE The following is the hydrologic and hydraulic analysis for the proposed culvert extension for the Anchor Mill / Vermillion Village development located at 404 North Church Street in Huntersville, NC. The subject parcel is currently undeveloped and is located in an area between North Church Street, Glendale Drive and Huntersville Concord Road encompassing an area of approximately 30.72 acres. The proposed development will be a mixed -use development. Multifamily residential housing units are proposed with the possibility of future commercial outparcels. In addition to the buildings, the proposed development will include public streets, parking areas, utilities to service the proposed buildings, storm water drainage systems, and other associated appurtenances. The storm water runoff from the developed areas will be captured and conveyed to underground extended detention systems where release rates will be controlled via a low flow orifice in each riser structure for each underground system. The post -developed peak flow rates to the culvert being analyzed will be drastically reduced utilizing these methods. The culvert being analyzed is an existing 54-inch corrugated metal pipe, located on an existing creek named South Prong Clark Creek and is located on the southwest corner of the site where the creek flows beneath Huntersville-Concord Road. The culvert is 100-feet long with a slope of 2.83%. The project proposes extending the culvert northward into the project site approximately 36-feet to accommodate for road frontage improvements and the widening of Huntersville-Concord Road. The extended portion is to match the current slope, pipe material, and pipe diameter of the existing culvert pipe. FEMA Information The site currently lies on parcels within The Town of Huntersville and is located on the FEMA F.I.R.M. map number 3710465100J panel number 4651 J. The site is located in an area defined as Zone X (Areas outside of the 0.2% annual chance floodplain). (See Appendix A) Site Soil Information The site soils were obtained from the NRCS Web Soil Survey and are as follows: Soil Types: Cecil (CuB) — Cecil -Urban land complex, 2% to 8% slopes Cecil (CeB2) — Cecil sandy clay loam, 2% to 8% slopes Cecil (CeD2) — Cecil sandy clay loam, 8% to 15% slopes The above soils are listed as hydrologic Soil Group B. (See Appendix A) The following hydrological calculations in this report are based on the SCS Method following the Town of Huntersville and Mecklenburg County design manuals and requirements. II. PRE -DEVELOPED HYDROLOGY Curve Number and Basin Characteristics The runoff curve number is based on land use (type) and the hydrologic soil group for the drainage basin (type B). The site is made up of four drainage basins with a combined area of approximately 57.66 acres. Per requirements, drainage area #1 is analyzed as 50% woods and 50% pasture in the pre -developed condition. Based on this information, and using the TR-55 Manual, the curve number and basin characteristics for the pre -developed areas are as follows: Drainage Basin Area Land Type acres CN Pre -Development 26.90 13.45 Ac wooded (55) & 59 Area #1 13.45 Ac pasture 61 Pre -Development 3.17 3.17 Ac wooded (58) 58 Area #2 Pre -Development 6.94 See Drainage Map 74 Sea le Street Pre -Development 20.65 Residential'/ acre lot size 70 Area #4 Time of Concentration The time of concentration, Tc for the drainage area will be calculated using the TR-55 manual by analyzing sheet flow, shallow concentrated flow and channel flow and the characteristics of the flow path: Area Tc min Pre -Developed Area #1 38.30 Pre -Developed Area #2 19.50 Pre -Developed Sea le Street 27.00 Pre -Developed Area #4 30.10 Rainfall Amounts The following are rainfall precipitation amounts taken from the Charlotte -Mecklenburg Storm Water Design Manual (see Appendix A): Rainfall Amounts 25-year, 24-hour 5.76 in Runoff Calculations Per the SCS Method, the runoff to evaluate the culvert extension will be calculated for the 25-yr storm event. This storm event will be used to determine release rates from drainage areas in the pre - developed condition and the proposed storm water management design. The results are as follows: 2 Runoff Amounts (cfs), 25-yr Storm Event Seagle Street Area #1 Area #2 Area #4 AP #1 Total Pre -Development 18.67 30.64 5.51 48.20 98.90 Drainage to AP #1 III. POST -DEVELOPMENT HYDROLOGY The runoff for the post -developed conditions will also be calculated using the SCS Method as previously described in the pre -developed conditions section of this report. Runoff to the analyzed culvert will be separated into Drainage Areas #1, #2, #4, and offsite from Seagle Street totaling 58.32 acres. Curve Number and Basin Characteristics The runoff curve number is based on land use (type) and the hydrologic soil group for the drainage basin (type B). Drainage Areas #1 A, #1 B, #1 C, #1 D and #1 E will include most of the proposed development area and are analyzed as commercial and business urban district. Drainage Area #2 is analyzed as an undisturbed wooded area and Drainage Area #4 is analyzed as residential'/ acre lots. Based on this information, and using the TR-55 Manual, the curve number and basin characteristics for the post -developed areas are as follows: Drainage Basin Area Land Type acres CN Post -Development 5 3.98 Ac impervious area (98) 90 Area #1 A .11 1.13 Ac open sace 61 Post -Development 6 4.85 Ac impervious area (98) 88 Area #1 B .77 1.92 Ac open sace 61 Post -Development 13 8.59 Ac impervious area (98) 85 Area #1 C .23 4.64 Ac open sace 61 Post -Development 1 0.27 Ac open space (61) 58 Area #1 D .37 1.10 Ac wooded area 55 Post -Development 1 1.26 Ac impervious area (98) 95 Area #1 E .40 0.14 Ac open sace 61 Post -Development 2.85 2.85 Ac wooded area (55) 55 Area #2 Pre -Development 6.94 See Drainage Map 74 Seagle Street Post -Development 20.65 Residential '/ acre lot size 70 Area #4 Time of Concentration The time of concentration, Tc for the Post -Development Drainage Area #1 D, #2, and #4 will be calculated using sheet flow, shallow concentrated flow and channel flow and the characteristics of the flow path for the area. Drainage areas #1A, #1 B, #1 C and #1 E will be assigned a time of concentration of 6 minutes due to the smaller size of the drainage area and the minimal length of the flow path: 3 Area Tc min Post -Developed Area #1 A 6.0 Post -Developed Area #1 B 6.0 Post -Developed Area #1 C 6.0 Post -Developed Area #1 D 13.6 Post -Developed Area #1 E 6.0 Post -Developed Area #2 19.5 Post -Developed Area #4 31.1 Pre -Developed Sea le Street 27.0 Rainfall Amounts The following are rainfall precipitation amounts taken from the Charlotte -Mecklenburg Storm Water Design Manual (see Appendix A): Rainfall Amounts 25-year, 24-hour 5.76 in Runoff Calculations Per the SCS Method, the runoff to evaluate the culvert extension will be calculated for the 25-yr storm event. This storm event will be used to determine release rates from drainage areas in the post - developed condition. The results are as follows: Runoff Amounts (cfs) 25-yr Storm (cfs) Post -Development Drainage Area #1A 0.85 Post -Development Drainage Area #1 B 1.08 Post -Development Drainage Area #1 C 1.86 Post -Development Drainage Area #1 D 2.38 Post -Development Drainage Area #1 E 9.79 Post -Development Area #2 4.57 Post -Development Area #4 48.20 Post -Development Seagle Street 18.67 Post -Development Drainage to AP #1 77.82 12 IV. CULVERT HYDRAULIC EVALUATION Culvert Observations The culvert observed is a 54-inch corrugated metal pipe which is projecting out from the ground surface on the upstream side. Based on site survey information, the slope of the pipe is 2.8%, sloping away from the project site and the pipe has headwall end treatment on the downstream side. The culvert appears to be in good condition with no visible signs of erosion or scouring around the pipe. High watermarks observed on the pipe appear to indicate that headwater depth remains less than the pipe diameter, thus indicating an unsubmerged condition during heavy storm events. The culvert appears to have a small amount of base flow running through the bottom with some sediment deposits within the internal corrugations. (See Appendix D for site photographs) Culvert Hydraulics Calculations Mannings Equation will be utilized to determine the maximum allowable flow rate of the 54-inch corrugated metal pipe. Calculations are as follows: C. t. Where: A = 15.9sf R = 1.125ft S = 0.0283 Therefore: Maximum Allowable Q = 179.62cfs Conclusion Based on hydrologic and hydraulic calculations, we have come to the following conclusions: • The culvert maximum flow capacity is 179.62cfs. • The 25-yr storm event in the existing conditions produce a peak flow of 98.90cfs. • The 25-yr storm event in the post -developed conditions produce a peak flow of 77.82cfs. • With the use of Stormwater management devices onsite, post -developed peak flow rates will be 21.08cfs less than pre -developed peak flow rates. See table below. Peak Flow Rates to Culvert (cfs) Pre -Developed 25-year, 24-hour 98.90 Post -Developed 25-year, 24-hour 77.82 Therefore, the culvert extension will have the capacity required to safely convey stormwater runoff from the site and other contributing areas beneath Huntersville-Concord Road. 5 Appendix A Maps, Tables and Figures Site Location Map USGS Map Floodway / FEMA Maps Soils Map and Table Curve Number Charts Charlotte -Mecklenburg Stormwater Design Manual Rainfall Table 0 APPENDIX A Site Location Diagram USGS Map Soils Map and Table FEMA F.I.R.M. Map Rainfall Table Curve Numbers 9/9/2016 Google Maps Go gle Maps Ramah Church Rd Si5 G7 CL a m w Oua11G5p555nllonra�park dr S � a 2 ngd Sherwand pr ,:.; SITE 0 `rr� y s n Dr 14, y,Gs , 6rPga °)Ip pe °ru ¢`ya r• 2nd $t yr aid Verrry li,, ❑r � 7 d x Gilead Rd H u n t e r s v i l e t � Google F45 va nihrnnk SS Map data 9)2016 Google 500 ft https:/Avww.google.com/maps/@35.4160366,-80.8376616,15.94z 1 /1 1 - - � • .• r • • ' � � � � � R L � air ` 1 • , 1 1 ■ 1 I 1 •� AL r 1• { LJpr- - � le ti 1 96 16 i 1 � 1 •ti 1 �' -�ti �" + � ti I • r �5k I yk a 1 -��� � 1 4 •� 1 � ■ ' ti • _ ' a ' - rr i _ar 1.0 _� 1 7� f ■ 'z Z J lb yT I 1 • i UJ r - — ~ ~• _ ! 1 Rr v •} - 1 % ~��•� r. ` Ifir rM6y r ern - - — ?■.� + ' i 1� _ • - ■LE, •� • r 1 f _rr, * �� 0 RIPa - ■ ai ■� ! a 11 7 ■F i •5` ! ■T IL Lr , ar Or, RL 1J'�' - ■ ~ �. yr ` 90 *} T ! .f } tiIF ■ ZL i—!• �T1 i . 1 �• - . . r 1 1 1 •ti -j 9 r %r' r 5 ' • rr * 4 -, '' • •%i 1• * i r 5 ' 1 ti• -� _ �� ' _ _ } '*a-" + �ti -% i ,• � �+� r 1 L 1� _ -Fir ti . r' • 1�' 1 1 1 1 1 J i J 1 ■'�ti + % 1p 3: Soil Map —Mecklenburg County, North Carolina (Anchor Mill Soil Map) 514480 514560 514640 514720 514800 514880 514960 35° 25' 9" N - I a� r W. I f 9 I I - 35° 259" N �I It I0` in k S ,�,�t' I' _ ram• '►e' v' lyyl + PP v � �' ed t �)►, dP� � r t. � � �r v s. rE 14 a v `r I� M � M L 1 1 + 'O` O Awl .! o m �. � F SY•� 1 -1 � h. .4 '. i� M A. M <P f S � A m dPl M M .- L V ♦ �1CS- - M Warning: Soil Map may not be valid at this scale. 35° 24' 46" N 35° 24' 46" N 514480 514560 514640 514720 514800 514880 514960 LD Map Scale: 1:3,380 i printed on A portrait (8.5" x 11") sheet. o Meters $ $ N 0 50 100 200 300 Feet 0 150 300 600 900 Map projection: Web Mercator Corner coordinates: WGS84 Edge tics: UTM Zone 17N WGS84 USDA Natural Resources Web Soil Survey 11/29/2016 Conservation Service National Cooperative Soil Survey Page 1 of 3 514480 35o 259" N r "_ I . 514560 CUB Hydrologic Soil Group —Mecklenburg County, North Carolina (Anchor Mill HSG Soil Map) 514640 1 514720 514800 Y ti � i 4 f r low 514880 514960 I 35o 259" N o �3 O M 1 � 3 � ♦ T rA Y V ♦ M Warning: Soil Map may not be valid at this scale.; 35o 24' 46" N NA M I " 35o 24' 46" N 514480 514560 514640 514720 514800 514880 514960 LD Map Scale: 1:3,380 i printed on A portrait (8.5" x 11") sheet. o Meters $ $ N 0 50 100 200 300 Feet 0 150 300 600 900 Map projection: Web Mercator Corner coordinates: WGS84 Edge tics: UTM Zone 17N WGS84 USDA Natural Resources Web Soil Survey 11/29/2016 Conservation Service National Cooperative Soil Survey Pagel of 4 Hydrologic Soil Group —Mecklenburg County, North Carolina Anchor Mill HSG Soil Map Hydrologic Soil Group Hydrologic Soil Group— Summary by Map Unit — Mecklenburg County, North Carolina (NC119) Map unit symbol Map unit name Rating Acres in AOI Percent of AOI CeB2 Cecil sandy clay loam, 2 B 11.0 37.8% to 8 percent slopes, moderately eroded CeD2 Cecil sandy clay loam, 8 B 11.3 38.7% to 15 percent slopes, moderately eroded CuB Cecil -Urban land B 6.9 23.5% complex, 2 to 8 percent slopes Totals for Area of Interest 29.2 100.0% Description Hydrologic soil groups are based on estimates of runoff potential. Soils are assigned to one of four groups according to the rate of water infiltration when the soils are not protected by vegetation, are thoroughly wet, and receive precipitation from long -duration storms. The soils in the United States are assigned to four groups (A, B, C, and D) and three dual classes (A/D, B/D, and C/D). The groups are defined as follows: Group A. Soils having a high infiltration rate (low runoff potential) when thoroughly wet. These consist mainly of deep, well drained to excessively drained sands or gravelly sands. These soils have a high rate of water transmission. Group B. Soils having a moderate infiltration rate when thoroughly wet. These consist chiefly of moderately deep or deep, moderately well drained orwell drained soils that have moderately fine texture to moderately coarse texture. These soils have a moderate rate of water transmission. Group C. Soils having a slow infiltration rate when thoroughly wet. These consist chiefly of soils having a layer that impedes the downward movement of water or soils of moderately fine texture or fine texture. These soils have a slow rate of water transmission. Group D. Soils having a very slow infiltration rate (high runoff potential) when thoroughly wet. These consist chiefly of clays that have a high shrink -swell potential, soils that have a high water table, soils that have a claypan or clay layer at or near the surface, and soils that are shallow over nearly impervious material. These soils have a very slow rate of water transmission. If a soil is assigned to a dual hydrologic group (A/D, B/D, or C/D), the first letter is for drained areas and the second is for undrained areas. Only the soils that in their natural condition are in group D are assigned to dual classes. usoA Natural Resources Web Soil Survey 11/29/2016 4� Conservation Service National Cooperative Soil Survey Page 3 of 4 d8 E ltl ry w p� N U wv $ FCL 33 F7-$3 Cfl W W =)LU �s3Zo v rFJ-� a r za QC7 n j I p y ae `L H a a z gra a d Q �/ F, EEE Z °�' w ' € ` Q LU o �d� H w a w LL J z u� ° Q Q � U � N �� E [' = cfl o � a x G m�� H= -6 ELl �� a C)o z z E LQ ,Sr F z OM w2" Wi8 Omp CW �� ova �Nk p t � v U. n oC6 ��tl�lasE-1 �� �o � eo ❑ O�o� � op w LL GLENDALE �'R ° d �C sd� 0 W ,a p a ~ Lo 0 N [�n fit: .r b ❑ n o 6 a oC12Q _ a O O oa STEEL ST N p u I o O d F- C3 O C L- O n� $ Gy°� z efsrr o as =p ❑.. M C C g ~ _ ° uvi OU 1-------- F Q o o Q p° YE � 7o L) � j7o i Fn O C 70 L Cn CU Cc L_.�J Ll p C� CV cu O ❑ a Q — W�LL_AV - ww-1 i +L. C C C cad �d ❑ X O CO O CO Q 4 O C 0 0 0 N O;r- U { a CHAPTER HYDROLOGY 2.3 DESIGN FREQUENCY 2.3.1 Design Frequencies Description Storm system pipes Ditch systems Culverts/Cross-drain (subdivision streets) Culverts/Cross-drain (thoroughfare roads) Culverts (over regulated floodways) Culverts/Cross-drain (primary access streets) Usable and functionable part of structure or building (as defined in the Subdivision Ordinance) Design Storm 10 year 10 year 25 year 50 year 100 year No overtopping in 100 year 100 year + 1 foot 2.3.2 Rainfall Intensity The following rainfall intensities (Table 2-2) shall be used for all hydrologic analysis. Table 2-2 Rainfall Intensities - Charlotte, North Carolina Time Recurrence interval (years) Hours Minutes 2 5 10 25 50 100 0 5 5.03 6.30 7.03 8.21 9.00 9.92 6 4.78 6.02 6.75 7.89 8.65 9.53 7 4.55 5.76 6.49 7.59 8.32 9.17 8 4.34 5.53 6.26 7.31 8.03 8.84 9 4.16 5.32 6.04 7.06 7.75 8.54 10 3.99 5.12 5.84 6.83 7.50 8.26 15 3.33 4.35 5.03 5.87 6.46 7.11 16 3.23 4.22 4.89 5.72 6.29 6.92 17 3.13 4.10 4.77 5.57 6.13 6.74 18 3.04 3.99 4.65 5.43 5.97 6.57 19 2.96 3.89 4.53 5.30 5.83 6.41 20 2.88 3.79 4.43 5.17 5.69 6.26 21 2.80 3.70 4.32 5.05 5.56 6.12 22 2.73 3.61 4.23 4.94 5.44 5.98 23 2.66 3.53 4.14 4.83 5.32 5.85 24 2.60 3.45 4.05 4.73 5.21 5.73 25 2.54 3.37 3.96 4.63 5.10 5.61 26 2.48 3.30 3.88 4.54 5.00 5.50 27 2.43 3.23 3.81 4.45 4.90 5.39 28 2.38 3.17 3.73 4.36 4.81 5.29 29 2.33 3.11 3.66 4.28 4.72 5.19 30 2.28 3.05 3.60 4.20 4.64 5.09 40 1.90 2.57 3.05 3.56 3.93 4.32 50 1.64 2.23 2.66 3.10 3.43 3.76 1 60 1.45 1.98 2.36 2.76 3.05 3.34 2 120 0.88 1.21 1.45 1.70 1.89 2.06 3 180 0.65 0.90 1.07 1.25 1.40 1.52 6 360 0.38 0.53 0.62 0.73 0.82 0.89 12 720 0.22 0.31 0.36 0.42 0.47 0.51 24 1440 0.13 0.18 0.20 0.24 0.27 0.29 P24 (inches - in.) 3.12 4.32 4.80 5.76 6.48 6.96 2-5 Chapter 2 Estimating Runoff Technical Release 55 Urban Hydrology for Small Watersheds Table 2-2a Runoff curve numbers for urban areas _v Cover description Cover type and hydrologic condition Fully developed urban areas (vegetation established) Curve numbers for -----hydrologic soil group Average percent impervious area 2/ A B C D Open space (lawns, parks, golf courses, cemeteries, etc.) 3/: Poor condition (grass cover < 500/6).......................................... Fair condition (grass cover 50% to 750/6).................................. Good condition (grass cover > 750/6)......................................... Impervious areas: Paved parking lots, roofs, driveways, etc. (excluding right-of-way)............................................................. Streets and roads: Paved; curbs and storm sewers (excluding right-of-way)................................................................................ Paved; open ditches (including right-of-way) .......................... Gravel (including right -of -way) ................................................. Dirt (including right -of -way) ...................................................... Western desert urban areas: Natural desert landscaping (pervious areas only) / ..................... Artificial desert landscaping (impervious weed barrier, desert shrub with 1- to 2-inch sand or gravel mulch and basin borders)...................................................................... Urban districts: Commercial and business................................................................. Industrial............................................................................................. Residential districts by average lot size: 1/8 acre or less (town houses).......................................................... 1/4 acre................................................................................................ 1/3 acre................................................................................................ 1/2 acre................................................................................................ 1 acre................................................................................................... 2 acres.................................................................................................. Developing urban areas Newly graded areas (pervious areas only, no vegetation) 5i Idle lands (CN's are determined using cover types similar to those in table 2-2c). 68 79 86 89 49 69 79 84 39 61 74 80 98 98 98 98 98 98 98 98 83 89 92 93 76 85 89 91 72 82 87 89 63 77 85 88 96 96 96 96 85 89 92 94 95 72 81 88 91 93 65 77 85 90 92 38 61 75 83 87 30 57 72 81 86 25 54 70 80 85 20 51 68 79 84 12 46 65 77 82 77 86 91 94 1 Average runoff condition, and Ia = 0.2S. 2 The average percent impervious area shown was used to develop the composite CN's. Other assumptions are as follows: impervious areas are directly connected to the drainage system, impervious areas have a CN of 98, and pervious areas are considered equivalent to open space in good hydrologic condition. CN's for other combinations of conditions may be computed using figure 2-3 or 2-4. 3 CN's shown are equivalent to those of pasture. Composite CN's may be computed for other combinations of open space cover type. 4 Composite CN's for natural desert landscaping should be computed using figures 2-3 or 2-4 based on the impervious area percentage (CN = 98) and the pervious area CN. The pervious area CN's are assumed equivalent to desert shrub in poor hydrologic condition. 5 Composite CN's to use for the design of temporary measures during grading and construction should be computed using figure 2-3 or 24 based on the degree of development (impervious area percentage) and the CN's for the newly graded pervious areas. (210-VI-TR-55, Second Ed., June 1986) 2-5 Chapter 2 Estimating Runoff Technical Release 55 Urban Hydrology for Small Watersheds Table 2-2c Runoff curve numbers for other agricultural lands _v Curve numbers for ------------------------------ Cover description ---------------------- ------- hydrologic soil group ------- Hydrologic Cover type condition A B C D Pasture, grassland, or range —continuous Poor 68 79 86 89 forage for grazing. 2/ Fair 49 69 79 84 Good 39 61 74 80 Meadow —continuous grass, protected from — 30 58 71 78 grazing and generally mowed for hay. Brush —brush -weed -grass mixture with brush Poor 48 67 77 83 the major element. 31 Fair 35 56 70 77 Good 30 V 48 65 73 Woods —grass combination (orchard Poor 57 73 82 86 or tree farm). 5/ Fair 43 65 76 82 Good 32 58 72 79 Woods. sl Poor 45 66 77 83 Fair 36 60 73 79 Good 30 V 55 70 77 Farmsteads —buildings, lanes, driveways, — 59 74 82 86 and surrounding lots. 1 Average runoff condition, and Ia = 0.25. 2 Poor. <50%) ground cover or heavily grazed with no mulch. Fair: 50 to 75% ground cover and not heavily grazed. Good: > 75% ground cover and lightly or only occasionally grazed. 3 Poor. <50%ground cover. Fair: 50 to 75% ground cover. Good: >759/oground cover. 4 Actual curve number is less than 30; use CN = 30 for runoff computations. 5 CN's shown were computed for areas with 50%woods and 50%grass (pasture) cover. Other combinations of conditions may be computed from the CN's for woods and pasture. 6 Poor: Forest litter, small trees, and brush are destroyed by heavy grazing or regular burning. Fair: Woods are grazed but not burned, and some forest litter covers the soil. Good: Woods are protected from grazing, and litter and brush adequately cover the soil. (210-VI-TR-55, Second Ed., June 1986) 2-7 Appendix B Pre -Development Calculations Pre -Development Drainage Area Map Offsite Drainage Area Map Pre -Development Hydrographs Report Pre -Developed Conditions Culvert Profile K�F \ Hff % a Hydrograph Report Hydraflow Hydrographs Extension for Autodesk@ Civil 3D@ by Autodesk, Inc. v2021 Monday, 08 / 28 / 2023 Hyd. No. 1 Offsite Runoff to AP#1 Hydrograph type = SCS Runoff Peak discharge = 18.67 cfs Storm frequency = 25 yrs Time to peak = 729 min Time interval = 3 min Hyd. volume = 75,176 cuft Drainage area = 6.940 ac Curve number = 74 Basin Slope = 0.0 % Hydraulic length = 0 ft Tc method = User Time of conc. (Tc) = 27.00 min Total precip. = 5.76 in Distribution = Type II Storm duration = 24 hrs Shape factor = 484 Q (cfs) 21.00 18.00 15.00 12.00 • II 3.00 Offsite Runoff to AP#1 Hyd. No. 1 -- 25 Year Q (cfs) 21.00 18.00 15.00 12.00 m 3.00 0.00 ' — ' ' ' ' " ' 0.00 0 180 360 540 720 900 1080 1260 1440 1620 — Hyd No. 1 Time (min) 1 Hydrograph Report Hydraflow Hydrographs Extension for Autodesk@ Civil 3D@ by Autodesk, Inc. v2021 Monday, 08 / 28 / 2023 Hyd. No. 4 Pre -Development Area #1 Hydrograph type = SCS Runoff Peak discharge = 30.64 cfs Storm frequency = 25 yrs Time to peak = 12.30 hrs Time interval = 3 min Hyd. volume = 162,179 cuft Drainage area = 26.900 ac Curve number = 59* Basin Slope = 0.0 % Hydraulic length = 0 ft Tc method = TR55 Time of conc. (Tc) = 35.70 min Total precip. = 5.76 in Distribution = Type II Storm duration = 24 hrs Shape factor = 484 Composite (Area/CN) = [(13.140 x 55) + (13.140 x 61) + (0.620 x 98)] / 26.900 Q (cfs) 35.00 30.00 25.00 20.00 15.00 10.00 5.00 0.00 6 9 12 15 18 21 24 27 Time (hrs) 1 Hydrograph Report Hydraflow Hydrographs Extension for Autodesk@ Civil 3D@ by Autodesk, Inc. v2021 Monday, 08 / 28 / 2023 Hyd. No. 5 Pre -Development Area #2 Hydrograph type = SCS Runoff Peak discharge = 5.513 cfs Storm frequency = 25 yrs Time to peak = 12.10 hrs Time interval = 3 min Hyd. volume = 19,096 cuft Drainage area = 3.170 ac Curve number = 58* Basin Slope = 0.0 % Hydraulic length = 0 ft Tc method = TR55 Time of conc. (Tc) = 19.50 min Total precip. = 5.76 in Distribution = Type II Storm duration = 24 hrs Shape factor = 484 Composite (Area/CN) = [(2.920 x 55) + (0.250 x 98)] / 3.170 Q (cfs) 6.00 5.00 4.00 3.00 2.00 1.00 0.00 0 3 — Hyd No. 5 Pre -Development Area #2 Hyd. No. 5 -- 25 Year 6 9 12 15 18 21 Q (cfs) 6.00 5.00 4.00 3.00 2.00 1.00 0.00 24 27 Time (hrs) 1 Hydrograph Report Hydraflow Hydrographs Extension for Autodesk@ Civil 3D@ by Autodesk, Inc. v2021 Monday, 08 / 28 / 2023 Hyd. No. 2 Drainage Area #4 - Offsite Hydrograph type = SCS Runoff Peak discharge = 48.20 cfs Storm frequency = 25 yrs Time to peak = 12.20 hrs Time interval = 3 min Hyd. volume = 196,100 cuft Drainage area = 20.650 ac Curve number = 70 Basin Slope = 0.0 % Hydraulic length = 0 ft Tc method = TR55 Time of conc. (Tc) = 30.10 min Total precip. = 5.76 in Distribution = Type II Storm duration = 24 hrs Shape factor = 484 Q (cfs) 50.00 40.00 20.00 10.00 0.00 0 3 — Hyd No. 2 Drainage Area #4 - Offsite Hyd. No. 2 -- 25 Year 6 9 12 15 18 21 Q (cfs) 50.00 40.00 30.00 20.00 10.00 0.00 24 27 Time (hrs) 1 Hydrograph Report Hydraflow Hydrographs Extension for Autodesk@ Civil 3D@ by Autodesk, Inc. v2021 Monday, 08 / 28 / 2023 Hyd. No. 7 Pre -Developed Runoff to AP#1 Hydrograph type = Combine IPeak discharge = 98.90 cfs Storm frequency = 25 yrs Time to peak = 12.20 hrs Time interval = 3 min Hyd. volume = 452,551 cuft Inflow hyds. = 1, 2, 4, 5 Contrib. drain. area = 57.660 ac Pre -Developed Runoff to AP#1 Q (cfs) Hyd. No. 7 -- 25 Year Q (cfs) 100.00 100.00 80.00 80.00 60.00 60.00 40.00 40.00 20.00 20.00 0.00 0.00 0 3 6 9 12 15 18 21 24 27 — Hyd No. 7 Hyd No. 1 Hyd No. 2 Hyd No. 4 Time (hrs) Hyd No. 5 Culvert Report Hydraflow Express Extension for Autodesk® Civil 3D® by Autodesk, Inc. Analysis Point #1 - (54inch CMP) - Existing Monday, Aug 28 2023 Invert Elev Dn (ft) = 732.88 Calculations Pipe Length (ft) = 100.00 Qmin cfs = 21.76 Slope (%) = 2.83 Qmax cfs = 98.90 Invert Elev Up (ft) = 735.71 Tailwater Elev (ft) = (dc+D)/2 Rise (in) = 54.0 Shape = Circular Highlighted Span (in) = 54.0 Qtotal (cfs) = 21.76 No. Barrels = 1 Qpipe (cfs) = 21.76 n-Value = 0.024 Qovertop (cfs) = 0.00 Culvert Type = Circular Corrugate Metal Pipe Veloc Dn (ft/s) = 2.00 Culvert Entrance = Projecting Veloc Up (ft/s) = 5.55 Coeff. K,M,c,Y,k = 0.034, 1.5, 0.0553, 0.54, 0.9 HGL Dn (ft) = 735.79 HGL Up (ft) = 737.04 Embankment Hw Elev (ft) = 737.53 Top Elevation (ft) = 756.00 Hw/D (ft) = 0.40 Top Width (ft) = 25.00 Flow Regime = Inlet Control Crest Width (ft) = 0.00 Elcv ift! 757. , 752. 747.OD 742.OD 737.00 732.00 727.00 0 Analysis Point #1 - (54inch CMP) - Existing 10 20 30 40 s0 8D 70 90 90 10D 110 120 CircularCulvert HGL Embank Hw Depth (ft) 21.29 16.29 11.29 6.29 1.29 -3.71 -9.71 130 140 Reach (ft) Appendix C Post -Development Calculations Post -Development Drainage Area Map Offsite Drainage Area Map Post -Development Hydrographs Report Post -Developed Conditions Culvert Profile 0 z 10 > < 0 L Z < < Hz 16 m MEN 000 Ors 0 < 01 I<D wopp ❑ z 6 > < < o JO O 1 Hydrograph Report Hydraflow Hydrographs Extension for Autodesk@ Civil 3D@ by Autodesk, Inc. v2021 Monday, 08 / 28 / 2023 Hyd. No. 1 Offsite Runoff to AP#1 Hydrograph type = SCS Runoff Peak discharge = 18.67 cfs Storm frequency = 25 yrs Time to peak = 12.15 hrs Time interval = 3 min Hyd. volume = 75,176 cuft Drainage area = 6.940 ac Curve number = 74 Basin Slope = 0.0 % Hydraulic length = 0 ft Tc method = User Time of conc. (Tc) = 27.00 min Total precip. = 5.76 in Distribution = Type II Storm duration = 24 hrs Shape factor = 484 Q (cfs) 21.00 18.00 15.00 12.00 9.00 6.00 3.00 0 00 0 3 — Hyd No. 1 Offsite Runoff to AP#1 Hyd. No. 1 -- 25 Year Q (cfs) 21.00 18.00 15.00 12.00 9.00 6.00 3.00 0 00 6 9 12 15 18 21 24 27 Time (hrs) 1 Hydrograph Report Hydraflow Hydrographs Extension for Autodesk@ Civil 3D@ by Autodesk, Inc. v2021 Monday, 08 / 28 / 2023 Hyd. No. 10 UG Pond 1A Outflow Hydrograph type = Reservoir Peak discharge = 0.850 cfs Storm frequency = 25 yrs Time to peak = 14.85 hrs Time interval = 3 min Hyd. volume = 75,749 cuft Inflow hyd. No. = 9 - Post -Development Area #1Max. Elevation = 756.65 ft Reservoir name = Underground Detention A Max. Storage = 56,391 cuft Storage Indication method used. UG Pond 1A Outflow Q (cfs) Hyd. No. 10 -- 25 Year Q (cfs) 35.00 35.00 30.00 30.00 25.00 25.00 20.00 20.00 15.00 15.00 10.00 10.00 5.00 5.00 0.00 0.00 0 15 30 45 60 75 90 105 120 135 150 Time (hrs) — Hyd No. 10 Hyd No. 9 0 Total storage used = 56,391 cult Hydrograph Report Hydraflow Hydrographs Extension for Autodesk@ Civil 3D@ by Autodesk, Inc. v2021 Monday, 08 / 28 / 2023 Hyd. No. 13 UG Pond 1 B Outflow Hydrograph type = Reservoir Peak discharge = 1.080 cfs Storm frequency = 25 yrs Time to peak = 14.95 hrs Time interval = 3 min Hyd. volume = 92,290 cuft Inflow hyd. No. = 12 - Post -Developed Area #1 BMax. Elevation = 769.68 ft Reservoir name = Underground Detention B Max. Storage = 71,424 cuft Storage Indication method used. UG Pond 1 B Outflow Q (cfs) Hyd. No. 13 -- 25 Year Q (cfs) 50.00 50.00 40.00 40.00 30.00 30.00 20.00 20.00 10.00 10.00 0.00 0.00 0 15 30 45 60 75 90 105 120 135 150 Time (hrs) — Hyd No. 13 Hyd No. 12 0 Total storage used = 71,424 cult Hydrograph Report Hydraflow Hydrographs Extension for Autodesk@ Civil 3D@ by Autodesk, Inc. v2021 Monday, 08 / 28 / 2023 Hyd. No. 16 UG Pond 1 C Outflow Hydrograph type = Reservoir Peak discharge = 1.861 cfs Storm frequency = 25 yrs Time to peak = 15.40 hrs Time interval = 3 min Hyd. volume = 171,073 cuft Inflow hyd. No. = 15 - Post -Development Area #LQx. Elevation = 768.77 ft Reservoir name = Underground Detention C Max. Storage = 127,976 cuft Storage Indication method used. UG Pond 1 C Outflow Q (cfs) Hyd. No. 16 -- 25 Year Q (cfs) 80.00 70.00 60.00 50.00 40.00 30.00 20.00 10.00 0 00 80.00 70.00 60.00 50.00 40.00 30.00 20.00 10.00 0 00 0 12 24 36 48 60 72 84 96 108 Time (hrs) — Hyd No. 16 Hyd No. 15 0 Total storage used = 127,976 cult 1 Hydrograph Report Hydraflow Hydrographs Extension for Autodesk@ Civil 3D@ by Autodesk, Inc. v2021 Monday, 08 / 28 / 2023 Hyd. No. 21 Post -Development Area #1 D Hydrograph type = SCS Runoff Peak discharge = 2.383 cfs Storm frequency = 25 yrs Time to peak = 12.10 hrs Time interval = 3 min Hyd. volume = 8,253 cuft Drainage area = 1.370 ac Curve number = 58* Basin Slope = 0.0 % Hydraulic length = 0 ft Tc method = User Time of conc. (Tc) = 19.50 min Total precip. = 5.76 in Distribution = Type II Storm duration = 24 hrs Shape factor = 484 Corn posite (Area/CN) = [(0.580 x 98) + (0.200 x 61)] / 1.370 Q (cfs) 3.00 2.00 1.00 Post -Development Area #1 D Hyd. No. 21 -- 25 Year 0.00 1 --.J- i i / I I I I 0 3 6 9 12 15 18 21 Hyd No. 21 Q (cfs) 3.00 2.00 1.00 0.00 24 27 Time (hrs) Hydrograph Report Hydraflow Hydrographs Extension for Autodesk@ Civil 3D@ by Autodesk, Inc. v2021 Monday, 08 / 28 / 2023 Hyd. No. 23 Post -Developed Area #1 E Hydrograph type = SCS Runoff Peak discharge = 9.792 cfs Storm frequency = 25 yrs Time to peak = 11.95 hrs Time interval = 3 min Hyd. volume = 24,647 cuft Drainage area = 1.400 ac Curve number = 95 Basin Slope = 0.0 % Hydraulic length = 0 ft Tc method = User Time of conc. (Tc) = 6.00 min Total precip. = 5.76 in Distribution = Type II Storm duration = 24 hrs Shape factor = 484 Q (cfs) 10.00 4.00 3.0 Hyd No. 23 Post -Developed Area #1 E Hyd. No. 23 -- 25 Year 6.0 9.0 12.0 15.0 18.0 Q (cfs) 10.00 oe 4.00 2.00 __" 0.00 21.0 Time (hrs) 1 Hydrograph Report Hydraflow Hydrographs Extension for Autodesk@ Civil 3D@ by Autodesk, Inc. v2021 Monday, 08 / 28 / 2023 Hyd. No. 27 Post -Developed Area #2 Hydrograph type = SCS Runoff Peak discharge = 4.579 cfs Storm frequency = 25 yrs Time to peak = 12.10 hrs Time interval = 3 min Hyd. volume = 16,553 cuft Drainage area = 3.200 ac Curve number = 55 Basin Slope = 0.0 % Hydraulic length = 0 ft Tc method = TR55 Time of conc. (Tc) = 19.50 min Total precip. = 5.76 in Distribution = Type II Storm duration = 24 hrs Shape factor = 484 Q (cfs) 5.00 4.00 3.00 2.00 1.00 0.00 ' 1 1 ---" 0 3 6 — Hyd No. 27 Post -Developed Area #2 Hyd. No. 27 -- 25 Year 9 12 15 18 21 Q (cfs) 5.00 4.00 3.00 2.00 1.00 0.00 24 27 Time (hrs) 1 Hydrograph Report Hydraflow Hydrographs Extension for Autodesk@ Civil 3D@ by Autodesk, Inc. v2021 Monday, 08 / 28 / 2023 Hyd. No. 2 Drainage Area #4 - Offsite Hydrograph type = SCS Runoff Peak discharge = 48.20 cfs Storm frequency = 25 yrs Time to peak = 12.20 hrs Time interval = 3 min Hyd. volume = 196,100 cuft Drainage area = 20.650 ac Curve number = 70 Basin Slope = 0.0 % Hydraulic length = 0 ft Tc method = TR55 Time of conc. (Tc) = 30.10 min Total precip. = 5.76 in Distribution = Type II Storm duration = 24 hrs Shape factor = 484 Q (cfs) 50.00 40.00 20.00 10.00 0.00 0 3 — Hyd No. 2 Drainage Area #4 - Offsite Hyd. No. 2 -- 25 Year 6 9 12 15 18 21 Q (cfs) 50.00 40.00 30.00 20.00 10.00 0.00 24 27 Time (hrs) 1 Hydrograph Report Hydraflow Hydrographs Extension for Autodesk@ Civil 3D@ by Autodesk, Inc. v2021 Monday, 08 / 28 / 2023 Hyd. No. 30 Post -Developed Runoff to AP#1 Hydrograph type = Combine Peak discharge = 77.82 cfs Storm frequency = 25 yrs Time to peak = 12.15 hrs Time interval = 3 min Hyd. volume = 659,841 cuft Inflow hyds. = 1, 19, 21, 23, 25, 27 Contrib. drain. area = 33.560 ac Post -Developed Runoff to AP#1 Culvert Report Hydraflow Express Extension for Autodesk® Civil 3D® by Autodesk, Inc. Analysis Point #1 - (54inch CMP) - Extension Invert Elev Dn (ft) = 732.88 Pipe Length (ft) = 136.00 Slope (%) = 2.83 Invert Elev Up (ft) = 736.73 Rise (in) = 54.0 Shape = Circular Span (in) = 54.0 No. Barrels = 1 n-Value = 0.024 Culvert Type = Circular Corrugate Metal Pipe Culvert Entrance = Projecting Coeff. K,M,c,Y,k = 0.034, 1.5, 0.0553, 0.54, 0.9 Embankment Top Elevation (ft) = 756.00 Top Width (ft) = 30.00 Crest Width (ft) = 0.00 Ele; ift! 752. 747.00 742.00 737.00 732.00 727.00 Friday, Sep 15 2023 Calculations Qmin cfs = 20.30 Qmax cfs = 77.82 Tailwater Elev (ft) = (dc+D)/2 Highlighted Qtotal (cfs) Qpipe (cfs) Qovertop (cfs) Veloc Dn (ft/s) Veloc Up (ft/s) HGL Dn (ft) HGL Up (ft) Hw Elev (ft) Hw/D (ft) Flow Regime Analysis Point #1 - (54inch CMP) - Extension = 77.30 = 77.30 = 0.00 = 5.77 = 8.24 = 736.41 = 739.30 = 740.82 = 0.91 = Inlet Control Hw Depth (ft) 20.27 15.27 10.27 5.27 0.27 -4.'3 -9.73 0 10 20 30 40 .50 60 83 90 100 11� 12'� 130 140 150 160 170 180 CircularCulvert HGL Embank Reach (ft) Appendix D Site Photographs Descrip5on: Projec5ng 54-inch culvert on upstream side. Descrip5on: Projec5ng 54-inch culvert on upstream side. Base flow and sediment deposits observed. No visible evidence of erosion or scouring. `lakr -` Description: Interior of 54-inch culvert on upstream side. Base flow and sediment deposits observed. Description: Interior of 54-inch culvert looking downstream. Base flow and sediment deposits observed. Engineering I Design I Planning I Construction Management Attachment 4: Agent Authorization Forms www.gpinet.com Engineering I Design I Planning I Construction GPIVermillion Village - Culvert Extension Many Talents, One Firm AGENT AUTHORIZATION FORM The purpose of this form is to authorize our firm to act on our behalf in matters related to aquatic resource (i.e. stream/wetlands) identification/mapping and regulatory permitting. The Representative of the Owner, Embrey Partners LLC, Joel Albea, does hereby authorize: Jonathan Hinkle, PE of Greenman -Pedersen Inc., to act on its behalf and take all actions necessary for processing, issuance, and acceptance of this permit or certification and any and all standard and special conditions attached. This authorization is for the project entitled Vermillion Village — Culvert Extension. Project Site Information: Project/Site Name: Property Address: Parcel Identification Number (PIN): Owner Contact Information: Representative: Title: Organization: Address: Phone Number: Email: Greenman -Pederson, Inc. Contact: Address: Phone Number: Email: s:z__— __� 4-- - Represen a ' f of Embrey Partners, LLC Vermillion Village — Culvert Extension 12010 Huntersville-Concord Road, Huntersville NC 28078 01905212.01902201.01905281 Joel Albea Vice President Embrey Partners, LLC (Property Buyer/Developer 7600 Broadway, Suite 300 San Antonio, TX 7820 919.571.0647 JalbeaOEmbrevDC.com Jonathan Hinkle, PE 1308 HWY 258 N Kinston NC 28504 910.250.5290 jhinkle@gpinet.com 11 /2/2023 Date GPI _mn�.r r.a�.rs.aoa GPIVermillion Village - Culvert Extension Many Talents, One Firm AGENT AUTHORIZATION FORM The purpose of this form is to authorize our firm to act on our behalf in matters related to aquatic resource (i.e. stream/wetlands) identification/mapping and regulatory permitting. The Representative of the Owner, Vermillion Anchor Mill Village LLC _ , does hereby authorize: Jonathan Hinkle, PE of Greenman -Pedersen Inc., to act on its behalf and take all actions necessary for processing, issuance, and acceptance of this permit or certification and any and all standard and special conditions attached. This authorization is for the project entitled Vermillion Village — Culvert Extension, Project Site Information: Project/Site Name: Vermillion Village — Culvert Extension Property Address: 406 North Church Street, Huntersville NC 28078 Parcel Identification Number (PIN): 01902201 Owner Contact Information: Representative: j> E 11600ImA1� Title: %tif/ri►A 444* Organization: Vermillion Anchor Mill Village LLC Address: 13815 Cinnabar Place Huntersville NC, 28087 Phone Number: _ ' 7 Email: NA>C B®rJm*$45lp 4omk • com Greenman -Pederson, Inc. Contact: Jonathan Hinkle, PE Address: 1308 HWY 258 N Kinston NC 28504 Phone Number: 910.250.5290 Email: jhinkle@gpinet.com a epresentative on Behalf Date of Vermillion Anchor Mill Village LLC GPI