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Home My WebLink About20210050 Ver 1_DWR Additional Info Request Response_REV 03-01-2021_FINAL_20210301 RALEIGH: 1 Glenwood Avenue, Suite 600, Raleigh, NC 27603 OFFICE: 919.789.9977 / FAX: 919.789.9591 / WWW.SEPIINC.COM March 1, 2021 Mr. Rick Trone NCDEQ-Division of Water Resources, 401 Buffer and Permitting Branch 512 N. Salisbury Street, Suite 942-F Raleigh, NC 27604 Re: Northern High School Replacement Project (DWR #20210050v1) Durham, Durham County, North Carolina Dear Mr. Trone, The following includes responses to the additional information request received February 17, 2021 from the N.C. Division of Water Resources: • In a letter sent to the Division dated February 2, 2021 you indicated the Hebron Road Extension is neither scheduled nor funded and that a 70’ right-of-way proposed under this project is necessary for the future possibility the extension is constructed. Additionally, you have indicated all site improvements at the crossing depicted in the plans submitted are necessary in order to support the driveway for the high school only. This Office believes the proposed 136’ culverts, outlet protection, fill, and other associated activities with this crossing also accommodate the extra width of the 70’ right-of-way being reserved for future Hebron Road Extension. If this Office has interpreted your response incorrectly, please provide additional details, including site plans that more clearly depict the proposed crossing [15A NCAC 02H .0506(b)(1)]. The Hebron Road Extension is not included in the City-County of Durham Capital Improvement Plan. It is not funded nor planned. Reference to the Hebron Road Extension, is not included or referenced in the final Construction Drawings for this project. The 70-foot wide right-of-way is a City of Durham requirement for the school entrance as well as the NC Department of Transportation (NCDOT) for the proposed high school entrance and is necessary to safely accommodate traffic and sidewalks for pedestrians and bikers that will utilize this entrance. The entrance road is classified as a minor thoroughfare by the City of Durham. As such the City of Durham requires a 70-foot right-of-way with 3 travel lanes (turn-lane, storage/car-pool lanes, bike lanes and sidewalks on both sides. (i.e. the width of the impact is determined by the Authority Having Jurisdiction-AHJ). Furthermore, the NCDOT requirements from the district engineer listed in their review of the Traffic Impact Analysis for the project, “in order to safely accommodate traffic at the proposed school, the Wellington Site Drive shall be constructed with one ingress lane and three egress lanes. The egress lanes shall consist of one exclusive left-turn lane with 150 feet of storage (i.e. 2 car-pool), a shared left- through lane, and an exclusive right-turn lane with 250 feet of storage (i.e., car-pool). The egress shall also contain 100 feet of Internal Protected Storage (IPS) before any parking or crossing maneuvers.” A copy of the June 17, 2020 TIA Review Comments from NCDOT is included for your reference. • Please provide detailed engineering plans, profile view, and cross-section of the proposed culvert for Stream SE. Please include details regarding stream alignment in relation to pipe alignment, pipe slope, pipe burial, and dissipator pad. The Division previously requested this information but believes it was not provided. Your response dated February 2, 2021 indicated this information was provided on Sheets C-7 and C-8, however those sheets appear to address the two 136’ box culverts at Impact Area #1 (Stream SD) and the 63’ box culvert at Impact Area #2. The detailed engineering plans, profile view and cross-section of proposed culvert SE is attached. Buffer impact amounts have been updated and a revised impact table is also included. • Mitigation is required for losses of equal to or greater than 300 linear feet of perennial stream. Please provide a mitigation plan that conforms to the requirements of 15A NCAC 02H .0506(c). Furthermore, buffer mitigation is required for some of the proposed buffer impacts. Please submit a mitigation plan detailing the amount of buffer impact for Zone 1 and/or Zone 2 and how the impact will be mitigated. [15A NCAC 02B .0714]. Statement of Availability Letters have been received from private mitigation banks and are included as part of this submittal. TABLE 1. BUFFER MITIGATION TABLE C3 1 P Allowable with Mitigation SE 14,928 7,119 C4 2 P Allowable with Mitigation SD 936 0 C4 3 P Allowable with Mitigation SD 906 0 C4 4 P Allowable with Mitigation SD 853 0 C6 7 P Allowable with Mitigation SD 943 0 C6 8 P Allowable with Mitigation SD 1,024 0 C6 9 P Allowable with Mitigation SA 914 0 20,504 7,119 3 TABLE 2. BUFFER CREDIT CALCUATIONS Z1 20,504 x 3 61512 Z2 7,119 x 1.5 10678.5 72190.5 Mitigation Ratios are assumed at 3:1 for Zone 1 & 1.5:1 for Zone 2 If you have any questions, please don’t hesitate to contact me at areusche@sepiinc.com. Sincerely, Anna Reusche, PWS Environmental Project Manager SEPI, Inc. ATTACHMENT 1 TRAFFIC IMPACT ANALYSIS (TIA) REVIEW COMMENT LETTER STATE OF NORTH CAROLINA DEPARTMENT OF TRANSPORTATION ROY COOPER ERIC BOYETTE GOVERNOR SECRETARY Mailing Address: NC DEPARTMENT OF TRANSPORTATION DIVISION 5/DISTRICT 2 815 STADIUM DRIVE DURHAM, NC 27704 Telephone: 919-220-4750 Fax: 919-560-3357 Customer Service: 1-877-368-4968 Website: www.ncdot.gov Location: 815 STADIUM DRIVE DURHAM, NC 27704 June 17, 2020 Mr. Joshua Reinke, PE Ramey Kemp & Associates, Inc. 5808 Faringdon Place, Suite 100 Raleigh, NC 27609 SUBJECT: Traffic Impact Analysis for Northern Durham High School - Addendum Dear Mr. Reinke: The NCDOT has completed its review of the updated Traffic Impact Analysis for Northern Durham High School sealed on April 9, 2020. In order to accommodate the site-generated traffic safely and efficiently, while also attempting to protect the functional integrity and operational capacity of the adjacent roadway facilities, the below noted improvements and/or restrictions are required. US 501 at Argonne Drive/Site Drive 1 • Install channelized southbound/northbound left turn lanes on US 501. • Install a left-over traffic signal that will coordinate with the signals at Site Drive 2 and at Seven Oaks Road • Site Drive shall be constructed as a limited movement intersection with one ingress lane and one egress lane. The egress lane shall consist of 100 feet Internal Protected Storage (IPS) before any parking or crossing maneuvers and consist of one right turn lane. • Argonne Drive will be restricted to a right-turn lane only. • Advisory note: The proposed driveway is subject to meeting NCDOT sight distance requirements. US 501 at Wellington Drive/Site Drive 2 • Site Drive shall be constructed with one ingress lane and three egress lanes. The egress lanes shall consist of one exclusive left-turn lane with 150 feet of storage, a shared left- through lane, and an exclusive right-turn lane with 250 feet of storage. The egress shall also contain 100 feet of Internal Protected Storage (IPS) before any parking or crossing maneuvers. • Install a conventional traffic signal to coordinate with signals at Site Drive 1 and at Seven Oaks Road. • Restripe US 501 for a northbound and southbound left-turn lane • Advisory note: The proposed driveway is subject to meeting NCDOT sight distance requirements. Page 2 of 2 All improvements proposed on state-maintained roadways shall meet all applicable NCDOT design requirements. If you have questions or need additional information, please feel free to contact me at (919) 220-4750. Sincerely, John Sandor, PE District Engineer Ec: Earlene W. Thomas, PE, City of Durham Transportation Clarence Bunting, PE, Congestion Management Jeremy Warren, PE, Division Traffic Engineer Doumit Ishak, Congestion Management John Grant, PE, Regional Traffic Engineer ATTACHMENT 2 REVISED IMPACT MAPS & IMPACT TABLE APPLICANT INFORMATION: OVRIER OW CONTACT DURHAM PUBLIC SCHOOLS FERNAND HALL DURHAM FLAK SCHOOLS OONSIRUCDC14 AND CAPITAL MANNINO 2011 HAWN ROAD DURHAM. NORTH CAROLNA 27704 (919)-580-2504 BERNARD.HALLCOPSNGNET Il 1 / / ////%i////� \\\ `'} �� -/i/�� \ 1\\ \ \ \ \ N— //-/////./// /i// .\11 \\ \\ \\\ \I 1 �� // ��v / /� \ 11 \ ///1/)) —1111 --�� /f1 / /I l/7l j j/ �/ / / /j I � \ /�OMt (� , /!I�IIIk\\\ � ,\\\\� Ii \\\\� . Arm r l c ell vi ,•;-- Wit. —. It&--------..A, \ \ 0 , \ , 4 \cP\ , „,,....„\\1 EXISTING 36" CMP CULVERT 19 LF EXISTING DOUBLE24" RCP CULVERT 12 LF / _____.._______ �� \ 11 \ \\\\ \1\\\ y \` \\ 1\I I I \ \ \\\\1 \\1 1 1 II L LF2,.. �1 ) I)�1\\�/v//1/1: `� GRAPHIC SCALE su a wo >m /oo ( Di t'i6E) 1 inoh — 200 R Northern High School Replacement 4622 & 4804 N. Roxboro Street Durham, NC 27704 Owner Durham Public Schools 2011 Hamlin Road Durham, NC 27704 919-560-2000 Architect RATIO 227 Fayetteville Street, Suite 301 Raleigh, North Carolina 27601 919-821-0805 Structural Engineer LHC Structural Engineers 5430 Wade Park Blvd, Suite 400 Raleigh, NC 27607 919-832-5587 Mechanical / Electrical/Plumbing Engineer PDC Engineers 3101 Poplarwood Court, Suite 320 Raleigh, NC 27604 919-790-9989 Civil Engineer & Landscape Architect CLH Design, PA 400 Regency Forest Drive, Suite 120 Cary, NC 27518 919-319-6716 Roof and Envelope Design Rick Nuhn Engineering 1913 Thayer Circle Greensboro, NC 27407 336-855-1182 Food Design FooDesign Associates 615 South College Street, 9th Floor Charlotte, NC 28202 704-545-6151 Theatre Consultant Theatre Consultants Collaborative 519 Polk Street Raleigh, NC 27604 919-546-0288 SEAL I DATE 12/09/2020 PRELIMINARY • NOT FOR CONSTRUCTION SHEET ISSUE 2 RAT O CAPARIGHT NOTCE: THIS ARCH PAL AND ENGINEERING DRAWING IS GIVEN IN ALL COMM.uWRI�HTSOFCOMD SAKI BE USED ONLY DISSEMINATION OR HT.Ioo.�ERV,sEAPEHEREa.sPEGfICAL..., TO THE AGREEMENT WITH RATIO HOMER AY BE PAVE PRIOR WPMEN CONSENTwEE CONFIDENCE PROJECT NO. 02000.000 SHEET TITLE C-1 OVERALL EXISTING CONDITIONS PLAN SHEET NUMBER IMPACT AREA 4'8 (see sheet C-6) ZONE 2- ALLOWABLE - 670 SQFT ZONE 1- ALLOWABLE WITH MITIGATION - 1024 SQFT IMPACT AREA #5 (see sheet C-5) ZONE 1- ALLOWABLE - 847 SQFT ZONE 2- ALLOWABLE - 672 SQFT ZONE 1- ALLOWABLE - 3,778 SQFT ZONE2 ALLOWABLE - 2,408 SQFT IMPACT AREA #2 (see sheet C-4) ZONE2- ALLOWABLE - 698 SQFT • IMPACT AREA #7 (see sheet C-6) ZONE 1- ALLOWABLE WITH MITIGATION 943 SQFT ZONE 2- ALLOWABLE- 655 SQFT IMPACT AREA #6 (see sheet C-6) <__A _E ZONE 2- ALLOWABLE - 742 SQFT ZONE 1- ALLOWABLE - 282 SQFT ZONE 1- ALLOWABLE - 3,014 SQFT ZONE2- ALLOWABLE--1,738 SQFT �` UAW ZONE2 - 1984 SQFT Opt jv I 'Ttr 1 hWillirfcilt l : r �` /JJ1 ZONE 1 -791 SQFT II(, � r Hrl �� sip I r r h11�i1 11 V '�i '-'j�1'f IIII-I�I�IIJ11s41 PROPOSED 8.5'HX8'W PRECAST CONCRETE CULVERT 63 LF IMPACT AREA #3 (see sheet C-4) ZONE 2- ALLOWABLE -631 SQFT ►� /=' ZONE 1- ALLOWABLE WITH MITIGATION - 906 SQFT ZONE 1- ALLOWABLE - 1,774 SQFT ZONE 1-ALLOWABLE UPON AUTHORIZATION - 5,575 SQFT eIcy -4,985SQFT �l /fir ZONE2- ALLOWABLE ZONE 1-ALLOWABLE- 1 IMPACT AREA # 1 (see sheet C-3) PROPOSED 4'HX7'W SECONDARY PRECAST CONCRETE CULVERT 136 LF PROPOSED 7'HX7'W PRIMARY PRECAST CONCRETE CULVERT 136 LF 114 SQFT 11 ZONE 1- ALLOWABLE - 2, 619 SQFT IMPACT AREA #9 (see sheet C-6) ZONE 1- ALLOWABLE WITH MITIGATION - 914 SQFT ZONE 2 ALLOWABLE - 615 SQFT • r 9 \\\ GRAPHIC SCALE Ise ,. _ an (W 1S1 ) 1 Inch - 150 11. APPLICANT INFORMATION: OMER OUTER CONTACT DUHAM PUBLIC SCHOOLS BERNARD HALL DUNAM PIEDC SCHOOLS CONSTRUCTION AND CAPITAL PLANNING 201I HAIEN ROAD OLRHAM, NORTH CAROLNA 27704 (019)-560-2 04 fiERRAROHALLOOPSHCIET TOTAL WETLANDS ON -SITE: TOTAL WETLANDS IMPACTED ON -SITE: TOTAL LINEAR FEET OF STREAM ON -SITE: TOTAL LINEAR FEET OF STREAM IMPACTED ON -SITE: TOTAL SQUARE FEET OF STREAM IMPACTED ON -SITE: TOTAL ZONE 1 ON -SITE TOTAL ZONE 2 ON -SITE: IMPERVIOUS AREA FOR PROPOSED PROJECT: 2.49 ACRES 0.00 ACRES 3,633 LF 647 LF 7,550 SF 19,202 SF 35,476 SF 19.92 ACRES .e. THIS PROPERTY IS LOCATED ZONE "X," AREAS DETERMINED TO BE OUTSIDE THE 0.2% ANNUAL CHANCE FLOOD PLAIN AS SHOWN ON FIRM PANELS 0824 & 0834, MAP ■ NUMBERS 3720082400K AND 3720083400K WITH AN EFFECTIVE DATE OF OCTOBER 19, 2018. Northern High School Replacement 4622 & 4804 N. Roxboro Street Durham, NC 27704 Owner Durham Public Schools 2011 Hamlin Road Durham, NC 27704 919-560-2000 Architect RATIO 227 Fayetteville Street, Suite 301 Raleigh, North Carolina 27601 919-821-0805 Structural Engineer LHC Structural Engineers 5430 Wade Park Blvd, Suite 400 Raleigh, NC 27607 919-832-5587 Mechanical / Electrical/Plumbing Engineer PDC Engineers 3101 Poplarwood Court, Suite 320 Raleigh, NC 27604 919-790-9989 Civil Engineer 8 Landscape Architect CLH Design, PA 400 Regency Forest Drive, Suite 120 Cary, NC 27518 919-319-6716 Roof and Envelope Design Rick Nuhn Engineering 1913 Thayer Circle Greensboro, NC 27407 336-855-1182 Food Design FooDesign Associates 615 South College Street, 9th Floor Charlotte, NC 28202 704-545-6151 Theatre Consultant Theatre Consultants Collaborative 519 Polk Street Raleigh, NC 27604 919-546-0288 SEAL I DATE 12/09/2020 PRELIMINARY • NOT FOR CONSTRUCTION SHEET ISSUE ali2 RAT I O COM. LAW RIGHTS OF COPYRIGHT MD OTHERWISE PPE HEREBY SPECIFICALLY RESERVED. PROJECT NO. 02000.000 SHEET TITLE C-2 OVERALL PROPOSED CONDITIONS PLAN SHEET NUMBER 11\11\tC4;7 ZONE 2- ALLOWABLE - 182 SQFT I / I J // ( / / / ///I I / / / / / P RMANENTOUTLETPROTECTION �� / ZONE2-ALLOWABLE WITH /Ill �/' / SECONDARVCULVERT / MITIGATION -7,119 SQFT �� q� �� . / 26'Lxls'wix16'w2x22°rH / / �il�i�� „• �t CLASSBSTONE l I / ZONE 1-ALLOWABLE WITH 4N,4 r /•�� II;P+ .-,�� . RIP RAP TO BE BURIED AT GRADE / I MITIGATION - 14,928 SQFT � � r ��)� �Zu—+ hk / / I i"�n�Ir,9�I�,;I//��r� 1 \ \ ._any.vi!.►�.� �G LIMITS OF DISTURBANCE �' rv'� dam'• h.. vat:, ...,.. or tl•2W��it—tl�WSvIMAW" %j�► NI' ■�fi�■�YII�I/r�� IMIIMEMMIVANIWAIIIMIrr �•� p / rl:I-■�I— ZONE 1-ALLOWABLE UPON ��t�►��t�� w�� / �� ■II AUTHORIZATION - 5,575 SQFT l I�_t llllllmemi��7iwVilr a��ra'n I �� ►x��i l ��v �t.■�■�IrrsiiiMINW3/4 - tmory �� l ■Z�� 1��=� r ZONE FT ar I��ww,il— NMr��1I` SJlLA Q \lam! ,,Y' llWrif �/� mJ/IIW SIM 41111111111V we .� PERMANENT OUTLET PROTECTION PRIMARY CULVERT 32'Lx24'W1x21'W2x22"TH CLASS B STONE RIP RAP TO BE BURIED AT GRADE ZONE 1- ALLOWABLE - 1,774 SQFT CULVERT #1 7H' X 7W' PRECAST CONCRETE BOX CULVERT 136' LF 4H' X 7W' PRECAST CONCRETE BOX CULVERT 136' LF PERMANENT STREAM IMPACT-187' LF ? _ / �r / kNx�i.��t ZONE 1 ALLOWABLE 2,619 Lr7T7STU7cE V \ `��1� JMALAPitea ♦ tr �lll ' PERMANENT STREAM � ��I� ��a��tt�1� TEMPORARY I / IMPACT 309 LF ��+ t ��,�■'-�1' II n1 jlii IMPACT, COFFER I T� 1• I I I I I1 //1•1\!J'tiI' STREAM CENTERLINE I I 1 I I I , TOP OF STREAM BANK I . I I I ��;��'•.�0�.`� EXISIING�/1l I I ,'I ,I��I1 III II � � II _I / �, ;J• \ ZONE1-ALLOWABLE-1,114SQFT \ I 1 ��• �i�� r \ -� - - �- \ \ .- y _ \ \\ IMPACT AREA #1 IMPACT TABLE ZONE 2- ALLOWABLE - 492 SQFT 1 1 t PERMANENT OUTLET PROTECTION CULVERT3 22Lx 11 'W 1 x26'W2x22'TH CLASS 8 STONE RIP RAP TO BE BURIED AT GRADE 11 1 Impact Location Impact Feature Impact Type Impact Purpose Impact Amount Permanent Loss Impact Amount Project Impact (sq ft) Project Impact (acres) Impact Area 1 Stream Existing Culvert 31 LF 0 LF 0 0 Impact Area 1 Stream Permanent Culvert 187 LF 187 LF 1,109 0.025 Impact Area 1 Stream Permanent Fill 309 LF 309 LF 3,036 0.069 Impact Areal Stream Permanent Rip Rap 32 LF 0 527 0.012 Impact Area 1 Stream Temporary Coffer Dam 8 LF 0 0 0 Totals: 536 LF 496 LF 4,672 SF 0.11 AC 40 YTYPE� , �- kJ I— r +L/ IMPACT DELINEATION WETLAND , . . , . W W W W W COFFER DAM RIP RAP FILL • • • • •• •• •• •• i• ••• ••�•�•• •• • • •••••••••••••• •••••••••••••• PROPOSED CULVERT EXISTING CULVERT — — — — — — ZONE 1 ALLOWABLE -III IIII-11 I I I -I 1 ZONE 2 ALLOWABLE / ZONE 1 ALLOWABLE UPON AUTHORIZATION ZONE 1 ALLOWABLE WITH MITIGATION UPON AUTHORIZATION ZZZZZ ZONE2 ALLOWABLE WITH MITIGATION UPON AUTHORIZATION STREAM IMPACT 7 7 7 7 0 NEUSE RIVER BUFFER AND STREAM IMPACTS - AREA 1 BUFFER IMPACTS ZONE 1 ZONE 2 CROOKED CREEK SQ FT SQ FT ALLOWABLE 5,507 5,659 ALLOWABLE UPON AUTHORIZATION 5,575 0 ALLOWABLE WITH MITIGATION UPON AUTHORIZATION 14,928 7,119 TOTAL 26,010 12,778 0 20 GRAPHIC SCALE 40 80 160 Northern High School Replacement 4622 & 4804 N. Roxboro Street Durham, I\IC 27704 Owner Durham Public Schools 2011 Hamlin Road Durham, NC 27704 919-560-2000 Architect RATIO 227 Fayetteville Street, Suite 301 Raleigh, North Carolina 27601 919-821-0805 Structural Engineer LHC Structural Engineers 5430 Wade Park Blvd, Suite 400 Raleigh, NC 27607 919-832-5587 Mechanical 1 Electrical/Plumbing Engineer PDC Engineers 3101 Poplarwood Court, Suite 320 Raleigh, NC 27604 919-790-9989 Civil Engineer & Landscape Architect CLH Design, PA 400 Regency Forest Drive, Suite 120 Cary, NC 27518 919-319-6716 Roof and Envelope Design Rick Nuhn Engineering 1913 Thayer Circle Greensboro, NC 27407 336-855-1182 Food Design FooDesign Associates 615 South College Street, 9th Floor Charlotte, NC 28202 704-545-6151 Theatre Consultant Theatre Consultants Collaborative 519 Polk Street Raleigh, NC 27604 919-546-0288 SEAL I DATE 12/09/2020 PRELIMINARY • NOT FOR CONSTRUCTION SHEET ISSUE KS RATIO COPYRIGHT NOTICE11118 ARCA PAL AND ENGINEERING OPAAVING IS GIVEN IN CONFIDENCE AND SHALL BE USED ONLY PURSUANT TO PIE AGREEMENT WITX PATIO. NO 011-1EP USE, DISSEMINA71011 OR DUPLICATION WY BE MADE WITIOUT PRIOR WRITIEN CONSENT Orrall0 ALL AMMON LAW ABMS Or COPYRIGHT AHO gALERVASE ARE HEREBY SPECIFICALLY RESERVED PROJECT NO. 02000.000 SHEET TITLE C-3 DETAIL PROPOSED CONDITIONS PLAN ( IN FEET ) 1 inch = 40 ft. SHEET NUMBER ZONE 1 ZONE 2 SQ FT SQ FT 791 3,922 0 0 2,695 0 3,486 3,922 BUFFER IMPACTS CROOKED CREEK ALLOWABLE NEUSE RIVER BUFFER AND STREAM IMPACTS - AREA 2,3 & 4 ALLOWABLE UPON AUTHORIZATION ALLOWABLE WITH MITIGATION UPON AUTHORIZATION TOTAL //r /ZONE1-ALLOWABLE-847SQFT / ZONE 2- ALLOWABLE -672 SQFT / / // /�'�� LIMITS OF DISTURBANCE RETAINING LIMITS OF DISTURBA CE ZONE 1- ALLOWABLE - 3,778 SQFT / ZONE 2- ALLOWABLE - 2,408 SQFT / / / IMPACT TABLE STREAM CENTERLINE TOP OF STREAM BANK IMPACT AREA #5 /// /// /// // PERMANENT OUTLET PROTECTION 3 6'Lx28'W 1 x24'W2x22"TH CLASS B STONE RIP RAP TO BE BURIED AT GRADE ZONE 1- ALLOWABLE - 3,014 SQFT ZONE 2- ALLOWABLE - 1,738 SQFT PERMANENT STREAM IMPACT 67 LF 8.5'HX8'W PRECAST CONCRETE BOX CULVERT 63 LF Impact Location Impact Feature Impact Type Impact Purpose Impact Amount Permanent Loss Impact Amount Project Impact (sq ft) Project Impact (acres) Impact Area 5 Stream Permanent Culvert 67 LF 67 LF 1,501 0.035 Impact Area 5 Stream Permanent Rip Rap 36 LF 0 936 0.021 Impact Area 5 Stream Temporary Coffer Dam 8 LE 0 0 0 Totals: 111 LF 67 LF 2,437 SF 0.056 AC NEUSE RIVER BUFFER AND STREAM IMPACTS - AREA 5 BUFFER IMPACTS ZONE 1 ZONE 2 CROOKED CREEK SQ FT SQ FT ALLOWABLE 7,639 4,818 ALLOWABLE UPON AUTHORIZATION ALLOWABLE WITH MITIGATION UPON AUTHORIZATION TOTAL 7,639 4,818 40 0 20 IMPACT LEGEND TYPE IMPACT DELINEATION WETLAND WWW WWW. ••• i W W W W W W W NY W NY COFFER DAM RIP RAP FILL Iiiiiiiiiiiiii PROPOSED CULVERT — t� EXISTING CULVERT ====== ZONE 1 ALLOWABLE -III III II I I ; 1 I -/l ZONE 2 ALLOWABLE / ZONE 1 ALLOWABLE UPON AUTHORIZATION ri: ZONE 1 ALLOWABLE WITH MITIGATION UPON AUTHORIZATION 0 1/2 0 0 00000 // 0 % // // ZONE2 ALLOWABLE WITH MITIGATION UPON AUTHORIZATION STREAM IMPACT V 7.7 0 0 0 77 77 77 77 77 GRAPHIC SCALE 40 80 160 ( IN FEET ) 1 inch = 40 ft. Northern High School Replacement 4622 & 4804 N. Roxboro Street Durham, NC 27704 Owner Durham Public Schools 2011 Hamlin Road Durham, NC 27704 919-560-2000 Architect RATIO 227 Fayetteville Street, Suite 301 Raleigh, North Carolina 27601 919-821-0805 Structural Engineer LHC Structural Engineers 5430 Wade Park Blvd, Suite 400 Raleigh, NC 27607 919-832-5587 Mechanical 1 Electrical/Plumbing Engineer PDC Engineers 3101 Poplarwood Court, Suite 320 Raleigh, NC 27604 919-790-9989 Civil Engineer & Landscape Architect CLH Design, PA 400 Regency Forest Drive, Suite 120 Cary, NC 27518 919-319-6716 Roof and Envelope Design Rick Nuhn Engineering 1913 Thayer Circle Greensboro, NC 27407 336-855-1182 Food Design FooDesign Associates 615 South College Street, 9th Floor Charlotte, NC 28202 704-545-6151 Theatre Consultant Theatre Consultants Collaborative 519 Polk Street Raleigh, NC 27604 919-546-0288 SEAL I DATE 12/09/2020 PRELIMINARY • NOT FOR CONSTRUCTION SHEET ISSUE al RAT I O COPYRIGHT NOTICE 11118 ARCHITECTURAL AND ENGINEERING OPAVING 18 GIVEN IN CONFIDENCE MO.. BE USED ON, PURSUANT-Mi. AGREEMENT WITX PATIO. NO 011-1EP USE, PROJECT NO. 02000.000 SHEET TITLE C-5 DETAIL PROPOSED CONDITIONS PLAN SHEET NUMBER in - Pit, , i 1 i I/ I1 7nNF 7_ Al I niA/ARI F _ 7 I I 7T•;' ZONE 1-ALLOWABLE WITH / / 1 I / / V/ /// , /1 1 / / <`�20 rim-_ _ 4 I - 1} 4L `z/ MITIGATION - 1024 SQFT IMPACT AREA #8 IMPACT TABLE \ ZONE 2- ALLOWABLE - 742 SQFT / / c/ 1 / / �/ / V 414 ZONE 1- ALLOWABLE - 282 SQFT / / / / // / / // ss IMPACT AREA #6 j / / / / , // // / // / RIP RAP OUTLET PROTECTION = 21 LF RIP RAP TO BE BURIED AT GRADE roe !\ ,' `. 32U — \ \‘RIP RAP OUTLET PROTECTION = 21 LF RIP L\ RAP TO BE BURIED AT GRADE Ir N c? / ZONE 1- ALLOWABLE WITH MITIGATION - 943 SQFT ZONE 2- ALLOWABLE - 655 SQFT IMPACT AREA > `7 / \ r/ I J/ ill IN \ L //,G RIP RAP OUTLET PROTECTION = 21 LF RIP / / RAP TO BE BURIED ATGRADE S%_% '// / i� r ZONE 1- ALLOWABLE WITH v. MITIGATION - 914 SQFT 1i ZONE 2- ALLOWABLE - 615 SQFT IMPACT AREA #9 NEUSE RIVER BUFFER AND STREAM IMPACTS - AREA 6,7,8 & 9 BUFFER IMPACTS ZONE 1 ZONE 2 CROOKED CREEK SQ FT SQ FT ALLOWABLE 282 2,682 ALLOWABLE UPON AUTHORIZATION 0 0 ALLOWABLE WITH MITIGATION UPON AUTHORIZATION 2,881 0 TOTAL 3,163 2,682 40 0 IMPACT LEGEND TYPE IMDELINEATION WETLAND o WWWWWW - W W 4 W .Y W W W * W COFFER DAM RIP RAP FILL• •�•�•�•�•�•��• • •�-�-�-�-�-�-�- PROPOSED CULVERT EXISTING CULVERT — — — — — - ZONE 1 ALLOWABLE00000 00000 ZONE 2 ALLOWABLE 20 GRAPHIC SCALE 40 80 160 Northern High School Replacement 4622 & 4804 N. Roxboro Street Durham, NC 27704 Owner Durham Public Schools 2011 Hamlin Road Durham, NC 27704 919-560-2000 Architect RATIO 227 Fayetteville Street, Suite 301 Raleigh, North Carolina 27601 919-821-0805 Structural Engineer LHC Structural Engineers 5430 Wade Park Blvd, Suite 400 Raleigh, NC 27607 919-832-5587 Mechanical / Electrical/Plumbing Engineer PDC Engineers 3101 Poplarwood Court, Suite 320 Raleigh, NC 27604 919-790-9989 Civil Engineer & Landscape Architect CLH Design, PA 400 Regency Forest Drive, Suite 120 Cary, NC 27518 919-319-6716 Roof and Envelope Design Rick Nuhn Engineering 1913 Thayer Circle Greensboro, NC 27407 336-855-1182 Food Design FooDesign Associates 615 South College Street, 9th Floor Charlotte, NC 28202 704-545-6151 Theatre Consultant Theatre Consultants Collaborative 519 Polk Street Raleigh, NC 27604 919-546-0288 SEAL I DATE 12/09/2020 PRELIMINARY - NOT FOR CONSTRUCTION SHEET ISSUE RAT I O CAPIRIGHT NOTCE THIS ARCHITECTJUL AND ENGINEERING [AMMO IS GIVEN IH CONFIDENCE AND SHALL BE USED ONLY PURSUANT TO THE AGREEMENT WITH RATIO NO USE, DISSEMINATION OR DUPLICATION MAY BE MADE W111101li 1,101i WRITTEN CONSENT OF PAM ALL COMM. LAW RIGHTS OF COP1111 11,010 OTHERWISE PPE HEREBY SPECIFICALLY RESERVED. PROJECT NO. 02000.000 SHEET TITLE C-6 DETAIL PROPOSED CONDITIONS PLAN ( IN FEET ) 1 inch = 40 ft. SHEET NUMBER • • • I 35 35 34 34 33 P 33 32 / A, O 34,C) If , /'i warts' is o- c- Ora 4 n1 /'4 PERMANENT OUTLET PROTECTION 32'Lx24'W 1 x21 'W2X22"TH CLASS 8 STONE 7'HX7'W PRIMARY PRECAST CONCRETE CULVERT 136 LF 1 340 / �\ 7 / )/ /'l / / // / / / PERMANENT OUTLET PROTECTION 26'Lx18'W1x16'W2X22"TH / CLASS B STONE 1/ HEADWALL M4 w. �., -VIP 1 V 1 i ��V � ghl i 4 HX7 W SECONDARY PRECAST CONCRETE 1/ AA • CULVERT 136 LF /y 4/I / �IIIIpI ,97 ..p `�� 1 HEADWALL / / / // / / / / I I I/ �/ / / // // // // ' 1 1 I / / / / j / 80 I I 1 I i / / I / // / I / I I / / 7I TEMPORARY COFFER DAM STREAM CENTERLINE TOP OF STREAM BANK \ AV 1 I IMPACT AREA #1 - CULVERT 1 PLAN FG ELEV: 349.00' FINISH 0 GRADE 350 5 TEMPORARY HEAD WALL 345 COFFER DAM HEAD WALL 0 340 ( \ --'II —I— ------ 5 I 335 \ OUTLET PROTECTION INSTALLED SUCH WITH EXISTING CLASS B RIPRAP 32 'Lx24'W1X21W2x22"TH SHALL BE THAT RIPRAP IS FLUSH GRADE. SEE DETAIL. DISSIPATOR EXISTING \ GRADE \ 0 INVERT IN:332.00' 136 LF 7.5'HX7.5'W PRIMARY PRECAST CONCRETE BOX CULVERT @ 2.21 % SLOPE I I I INVERT OUT: 329.00' 7 7 F 10+00 11+00 12+00 13+00 355 350 345 340 0 40 GRAPHIC SCALE 80 160 320 ( IN FEET ) 1 inch = 80 ft. HORIZONTAL: 1"=80' VERTICAL: 1"=8' FG ELEV: 349.00' HEAD WALL FINISH GRADE HEAD WALL INVERT OUT: 334.00' EXISTING /" '-' 5 GRADE 330 325 1 350 345 340 335 INVERT IN:335.50' 136 LE 4'HX5'W SECONDARY PRECAST BOX CULVERT @ 1.10% SLOPE OUTLET PROTECTION SHALL BE INSTALLED SUCH THAT RIPRAP IS FLUSH WITH EXISTING GRADE. SEE DETAIL. CLASS 8 RIPRAP DISSIPATOR 26'Lx 18W 1 'X 16W2X22 "TH 10+00 11+00 12+00 325 13+00 Northern High School Replacement 4622 & 4804 N. Roxboro Street Durham, NC 27704 Owner Durham Public Schools 2011 Hamlin Road Durham, NC 27704 919-560-2000 Architect RATIO 227 Fayetteville Street, Suite 301 Raleigh, North Carolina 27601 919-821-0805 Structural Engineer LHC Structural Engineers 5430 Wade Park Blvd, Suite 400 Raleigh, NC 27607 919-832-5587 Mechanical / Electrical/Plumbing Engineer PDC Engineers 3101 Poplarwood Court, Suite 320 Raleigh, NC 27604 919 790 9989 Civil Engineer & Landscape Architect CLH Design, PA 400 Regency Forest Drive, Suite 120 Cary, NC 27518 919-319-6716 Roof and Envelope Design Rick Nuhn Engineering 1913 Thayer Circle Greensboro, NC 27407 336-855-1182 Food Design FooDesign Associates 615 South College Street, 9th Floor Charlotte, NC 28202 704-545-6151 Theatre Consultant Theatre Consultants Collaborative 519 Polk Street Raleigh, NC 27604 919-546-0288 SEAL I DATE 12/09/2020 PRELIMINARY • NOT FOR CONSTRUCTION SHEET ISSUE ' RAT O CAPARIGHT NOTCE: THIS APLI-1 PAL AND ENGINEERING DRAWING IS GIVEN IN CONFIDENCE SHAL1 BE USED Or) RMS., TO THE AGREEMENT WITH RATIO HOMER USE, DISSEMINATION OR DUPLICATION WC BE PAVE V)111101li PRIOR WPMEN CONSENT Of PAPO ALL COMM. LAW RIGHTS OF COPYRIGHT/0C OPIERMSE APE HEREBY SPECIFICALLY RESERVED. PROJECT NO. 02000.000 SHEET TITLE C-7 CULVERT PROFILE CULVERT 1 PROFILE SHEET NUMBER j11_,Mation-- waft% STREAM CENTERLINE TOP OF STREAM BANK PERMANENT OUTLET PROTECTION 26'Lx18'W1x16'W2X22"TH CLASS 8 STONE 8.5'HX8'W PRECAST CONCRETE CULVERT 63 LF TEMPORARY COFFER DAM IMPACT AREA #2 - CULVERT 2 PLAN 35 35 34 34 33 33 32 32 0 350 345 340 335 FG ELEV: 350.00' FINISH GRADE / RETAINING WALL 5 ,,' 63 LF 8.5'HX8'W PRECAST CONCRETE BOX CULVERT @ 2.94% SLOPE 0 5 TEMPOR RY COFFER AM 0 5 330 OUTLET PROTECTION SHALL BE INSTALLED SUCH THAT RIPRAP IS FLUSH WITH EXISTING GRADE. SEE DETAIL. CLASS B RIPRAP DISSIPATOR 36'Lx24'W1X28W2x22"TH J _ — EXISTING • • �� GRADE •y INVERT IN:324.80' INVERT OUT:324.40' 7 7 n 10+00 11 +00 12+00 12+50 40 0 20 GRAPHIC SCALE 40 80 160 ( IN FEET ) 1 inch = 40 ft. HORIZONTAL: 1"=40' VERTICAL: 1"= 4' Northern High School Replacement 4622 & 4804 N. Roxboro Street Durham, NC 27704 Owner Durham Public Schools 2011 Hamlin Road Durham, NC 27704 919-560-2000 Architect RATIO 227 Fayetteville Street, Suite 301 Raleigh, North Carolina 27601 919-821-0805 Structural Engineer LHC Structural Engineers 5430 Wade Park Blvd, Suite 400 Raleigh, NC 27607 919-832-5587 Mechanical / Electrical/Plumbing Engineer PDC Engineers 3101 Poplarwood Court, Suite 320 Raleigh, NC 27604 919-790-9989 Civil Engineer & Landscape Architect CLH Design, PA 400 Regency Forest Drive, Suite 120 Cary, NC 27518 919-319-6716 Roof and Envelope Design Rick Nuhn Engineering 1913 Thayer Circle Greensboro, NC 27407 336-855-1182 Food Design FooDesign Associates 615 South College Street, 9th Floor Charlotte, NC 28202 704-545-6151 Theatre Consultant Theatre Consultants Collaborative 519 Polk Street Raleigh, NC 27604 919-546-0288 SEAL I DATE 12/09/2020 PRELIMINARY • NOT FOR CONSTRUCTION SHEET ISSUE r,' RAT O CAPARIGHT NOTCE: THIS APLI-1 PAL AND ENGINEERING DRAWING IS GIVEN IN CONFIDENCE AND SHALL BE USED ONLY RMS., TO THE AGREEMENT WITH RATIO NO OTHER APO ALL COMM. LAW R, MHT/0C".MESEPPEHEREBYSPECIFICMLYaDISSEMINATRRESERVED. PROJECT NO. 02000.000 SHEET TITLE C-8 CULVERT PROFILE CULVERT 2 PROFILE SHEET NUMBER 360 355 350 345 340 335 14' ''44 PERMANENT OUTLET PROTECTION CLASS B STONE 414.1.--11111111111111.1111 W1,111W2HW4H—.—,1451 'midi P7' 4 ESIfil.ffilaharilibl ,r7.:Iim _ . . . . 7. .,.. , . . i . . . ,,,,, . .,„ , . .. ...: , . . . . . . . ...., . . . . . . . . . . . . . . . .7,67.,._:) ---; --'------1.1 0/11 7:1,7-• 1:' -1. : 11: = - -1 .17617: 1.1 .. .2 r "" " .--' aTa--ii P 'A ''''''' - -...,...7„ . , : ,, ::::,...-Z....._.......- -1.: ----::-- I - _,.... ,...„,„...,.......:::„... _,,,. ,_,........- IRFA pp3 San - \ 046 ACRE 1 1—\ 11— 1 '} l/ii / �i 9 /� l /,'lII //i /�i IMPACT AREA # 1 — CULVERT 3 PLAN o JUU d- h M a M C 0 = 15"RCP @5.06% 355 \ FINISH GRADE EXISTING \ GRADE INVERT IN:347.00' 350 EXISTING N 24"RCP / N — -� �/ i i � FINISH OUTLET PROTECTION SHALL BE -- 177LF42 RCP- \ GRADE @127� / NI INSTALLED SUCH THAT RIPRAP - _ _ 'I . . IS FLUSH WITH EXISTING 7 GRADE. SEE DETAIL. CLASS B STONE INVERT IN•34147' 22'Lx11'W1X26'W2x22"TH 33 10+00 11+00 12+00 13+00 13+50 80 0 40 GRAPHIC SCALE 80 160 320 ( IN FEET ) 1 inch = 80 ft. HORIZONTAL: 1"=80' VERTICAL: 1"=8' Northern High School Replacement 4622 & 4804 N. Roxboro Street Durham, NC 27704 Owner Durham Public Schools 2011 Hamlin Road Durham, NC 27704 919-560-2000 Architect RATIO 227 Fayetteville Street, Suite 301 Raleigh, North Carolina 27601 919-821-0805 Structural Engineer LHC Structural Engineers 5430 Wade Park Blvd, Suite 400 Raleigh, NC 27607 919-832-5587 Mechanical / Electrical/Plumbing Engineer PDC Engineers 3101 Poplarwood Court, Suite 320 Raleigh, NC 27604 919-790-9989 Civil Engineer & Landscape Architect CLH Design, PA 400 Regency Forest Drive, Suite 120 Cary, NC 27518 919-319-6716 Roof and Envelope Design Rick Nuhn Engineering 1913 Thayer Circle Greensboro, NC 27407 336-855-1182 Food Design FooDesign Associates 615 South College Street, 9th Floor Charlotte, NC 28202 704-545-6151 Theatre Consultant Theatre Consultants Collaborative 519 Polk Street Raleigh, NC 27604 919-546-0288 SEAL I DATE 12/09/2020 PRELIMINARY • NOT FOR CONSTRUCTION SHEET ISSUE ' RAT O CAPARIGHT NOTCE: THIS APLI-1 PAL AND ENGINEERING DRAWING IS GIVEN IN CONFIDENCE AND SHALL BE USED ONLY RMS., TO THE AGREEMENT WITH RATIO HOMER USE, DISSEMINATION OR DUPLICATION WC BE PAVE VV111101li PRIOR WPMEN CONSENT Of PAPO ALL COMM. LAW RIGHTS OF COPYRIGHT/0C OPIERMSE PPE HEREBY SPECIFICALLY RESERVED. PROJECT NO. 02000.000 SHEET TITLE C-9 CULVERT PROFILE CULVERT 3 PROFILE SHEET NUMBER A L A PLAN (OUTLET TO FLAT AREA WITH NO WELL DEFINED CHANNEL) °OO 00 0 0°0 0 0°0 000 0 000 0 0 0 0 °0 00 0 0 o �000 0° 0 0 0 ° 00 0 oO °O 00 0 0 0 ° 0 0 0 0 0 0 ° ° 0 0°O ° °o 0 0000 /00 0 0 0 00 0000(\00 0 0 000 o . 0 0 0 n 0000 0 0 0 0 0 0 0 00 0°0 000 0 0 0 0 0 00 00 0 000°0 °0000 0 0 0 0°• 0 000 0 00 ° PLAN (OUTLET TO WELL DEFINED CHANNEL) MAINTENANCE NOTES: 1. RIP RAP OUTLET STRUCTURES TO BE INSPECTED WEEKLY AND AFTER EVERY RAINFALL EVENT. 2. REPAIR DISLODGED STONES TO DESIGN DIMENSIONS IMMEDIATELY, 3. IF MORE SUBSTANTIAL DAMAGE OCCURS, NOTIFY ENGINEER TO DETERMINE A REPAIR SOLUTION. 0 NOTES: TYPE STONE 0°0°° °o°0°' 00 OOo O0000o 0 00°°00 o Uo0 00 00°OOo 000�000 00 00O°° 0000000 Vo 000 000 0 0 00 SECTION A —A (AMOCO 2006 OR EQUI VALENT) FILTER BLANKET TYPE STONE 000 00000Oo°0000 00°000°000 00°00o°o00Oo °o c 13000 o SECTION 6-6 FILTER BLANKET (AMOCO 2006 OR EQUI VALENT) 1. TOP OF RIP RAP AT DOWNSTREAM END OF APRON SHALL BE FLUSH WITH NATURAL GRADE OF THE RECEIVING CHANNEL. 2. INSTALL OUTLET PROTECTION IMMEDIATELY AFTER INSTALLATION OF PIPE, 3. SEE GRADING PLAN FOR PERMANENT OUTLET PROTECTION DIMENSIONS. SEE EROSION CONTROL PLAN FOR TEMPORARY OUTLET PROTECTION DIMENSIONS. RIPRAP OUTLET PROTECTION DETAIL N. T.S. 3 2 )C ) 1 C )C ) ) C )C C )C )C )C )C )C ) C )C )C C )C )C )C ) C ) C ) C DC )C )C ) 8' SAND BAGS Northern High School Replacement 4622 & 4804 N. Roxboro Street Durham, NC 27704 Owner Durham Public Schools 2011 Hamlin Road Durham, NC 27704 919-560-2000 Architect RATIO 227 Fayetteville Street, Suite 301 Raleigh, North Carolina 27601 919-821-0805 Structural Engineer LHC Structural Engineers 5430 Wade Park Blvd, Suite 400 Raleigh, NC 27607 919-832-5587 Mechanical I Electrical/Plumbing Engineer PDC Engineers 3101 Poplarwood Court, Suite 320 Raleigh, NC 27604 919-790-9989 Civil Engineer & Landscape Architect CLH Design, PA 400 Regency Forest Drive, Suite 120 Cary, NC 27518 919-319-6716 TEMPORARY COFFER DAM DETAIL Roof and Envelope Design Ric u Engineering N1 13 ha r Circle ree sh :NC 27407 336-855-1182 Food Design FooDesign Associates 615 South College Street, 9th Floor Charlotte, NC 28202 704-545-6151 Theatre Consultant Theatre Consultants Collaborative 519 Polk Street Raleigh, NC 27604 919-546-0288 SEAL I DATE 12/09/2020 PRELIMINARY • NOT FOR CONSTRUCTION SHEET ISSUE KS RATIO COPYRIGHT NOTICE:11118 ARCH PAL AND ENGINEERING OPAVING 18 GIVEN IN CONFIDENCE MO.. BE USED ONLY PURSUANT TO PIE AGREEMENT WITX PATIO. NO 011-1EP USE, DISSEMIN,1011 OR DUPLICATION WY BE MADE WITIOUT PRIOR WRITIEN CONSENT Or 1.110 ALL GAMMON LAW PlarS Or COPYRIGHT AHO OTHERWISE ARE HEREBY SPECIFICALLY RESERVED PROJECT NO. 02000.000 SHEET TITLE C-10 DETAILS SHEET NUMBER Impact Sheet No.Stream Impact Area No.Permanent (P) / Temporary (T)Type of ImpactStream NameImpact Amount (LF)Permanent Loss Impact AmountC31 PSE 309309C31 PSD 187187C31 PSD 320C31 TSD 80C55 PSD 6767C55 PSD 360C55 TSD 80647563TOTAL STREAM IMPACTS Impact Sheet No.Buffer Impact Area No. Permanent (P) / Temporary (T) Reason for Impact Type of ImpactStream NameBuffer Mitigation Required (Y/N)Zone 1 impact (sq. ft.)Zone 2 impact (sq.ft.)C3 1 PRoad Crossing, Non‐PerpendicularAllowable with MitigationSE Y 14,928 7,119C3 1 PRoad Crossing‐Perpendicular Allowable SD N 2,619 492C3 1 PRoad Crossing‐PerpendicularAllowable Upon AuthorizationSD N 5,575 0C3 1 PRoad Crossing‐Perpendicular AllowableSD N 0 4,985C3 1 PRoad Crossing‐Perpendicular AllowableSD N 1774 182C3 1 PRoad Crossing‐Perpendicular AllowableSD N 1114 0C4 2 PStormwater Control MeasureAllowable with MitigationSD Y 936 0C4 2 PStormwater Control Measure AllowableSD N 0 698C4 3 PStormwater Control MeasureAllowable with MItigationSD Y 906 0C4 3 PStormwater Control Measure AllowableSD N 0 631C4 4 PStormwater Control MeasureAllowable with MItigationSD Y 853 0C4 4 PStormwater Control Measure AllowableSD N 0 609C4 4 PUtility‐Sewer‐Replacement AllowableSD N 791 0C4 4 PUtility‐Sewer‐Replacement AllowableSD N 0 1984C5 5 PRoad Crossing‐Perpendicular AllowableSD N 847 672 C5 5 PRoad Crossing‐Perpendicular AllowableSD N 3,778 2,408C5 5 PRoad Crossing‐Perpendicular AllowableSD N 3,014 1,738C6 6 PUtility‐Sewer‐Replacement AllowableSD N 282 742C6 7 PStormwater Control MeasureAllowable with MitigationSD Y 943 0C6 7 PStormwater Control Measure AllowableSD N 0 655C6 8 PStormwater Control MeasureAllowable with MitigationSD Y 1,024 0C6 8 PStormwater Control Measure AllowableSD N 0 670C6 9 PStormwater Control MeasureAllowable with MitigationSA Y 914 0C6 9 PStormwater Control Measure AllowableSA N 0 61540,298 24,200TOTAL BUFFER IMPACTS ATTACHMENT 3 MITIGATION STATEMENT OF AVAILBILITY (SOA) LETTERS EBX Buffer Mitigation Banks Statement of Availability February 18, 2021 NC Division of Water Resources Rick Trone 512 N. Salisbury St. Archdale Building, 9th floor Raleigh, NC 27604 Re Project: Northern High School Replacement Project This document confirms that Durham Public Schools (Applicant) for the Northern High School Replacement Project (Project) has expressed an interest to utilize 72,190.50 Square Feet of Riparian Buffer Mitigation Credits from the EBX sponsored Upper Neuse Riparian Buffer Umbrella Mitigation Bank or EBX-Neuse I, LLC sponsored Bucher Mitigation Bank. The specific bank site to be debited will either be Cedar Grove, Hatley or Bucher all located in HUC 03020201 and in the Falls Lake watershed. As the official Bank Sponsor, EBX and EBX-Neuse I, LLC, attests to the fact that mitigation is available for reservation at this time. These mitigation credits are not considered secured, and consequently are eligible to be used for alternate purposes by the Bank Sponsor, until payment in full is received from the Applicant resulting in the issuance of a Mitigation Credit Transfer Certificate by the bank acknowledging that the Applicant has fully secured credits from the bank and the Banker has accepted full responsibility for the mitigation obligation requiring the credits/units. The Banker will issue the Mitigation Credit Transfer Certificate within three (3) days of receipt of the purchase price. Banker shall provide to Applicant a copy of the Mitigation Credit Transfer Certificate and a documented copy of the debit of credits from the Bank Official Credit Ledger(s), indicating the permit number and the resource type secured by the applicant. A copy of the Mitigation Credit Transfer Certificate, with an updated Official Credit Ledger will also be sent to regulatory agencies showing the proper documentation. Please contact me at 919-209-1075 or cparker@res.us if you have any questions or need additional information. Best Regards, Caitlan B. Parker Resource Environmental Solutions, LLC 701 E. Bay Street, Suite 306 Charleston, SC 29403 Bank Sponsors – Environmental Banc & Exchange (EBX) and EBX-Neuse I, LLC