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HomeMy WebLinkAbout20190732 Ver 1_More Info Received_20190724Strickland, Bev From: Tinklenberg, Chris <Chris.Tinklenberg@kimley-horn.com> Sent: Wednesday, July 24, 2019 8:58 AM To: Johnson, Alan Subject: RE: [External] RE: NoDa DWR# 19-0732 Attachments: The Exchange -C4-1 Grading Drainage Plan -Preliminary -Marked up.pdf External email. Do not click links or open attachments unless you verify. Send all suspicious email as an attachment to report.spam@nc.gov Good morning Alan, Please see the response from the engineering project manager regarding avoidance and minimization during site planning, as well as an early site layout which is attached. This layout demonstrates an avoidance and minimization improvement over initial preliminary concept site layouts (not provided) which proposed 1 -acre of wetland impacts and over 600 If of stream impacts. This version does not propose steam relocation (100 If) and adds another 75 If of stream and 0.2 -acres wetland impacts from proposed grading limits. Here's his response: Chris, This site has substantial grades to account for across the site from Matheson Avenue right-of-way to Little Sugar Creek. Early Grading Plans for this project minimized the height of retaining walls and "daylighted" proposed grades at a 3:1 slope. In attempt to provide avoidance on site, the developer has substantially increased size and amount of retaining walls (some +20 feet in height) on-site to minimize impacts. These retaining walls extend along most of the developed area on the west side of Little Sugar Creek to minimize impacts to the wetlands and stream in the area. In addition to these retaining walls, the building footings will be much deeper foundations to avoid pressures against these retaining wall. While I can appreciate Mr. Johnson questioning the western building size and the ability to provide additional avoidance by making the building a smaller footprint; the project still must provide an adequate number of units for it to be viable. The building footprint and height, as well as the size of the parking lot, have reduced from earlier plans to provide additional avoidance and still meet City of Charlotte code requirements. For reference, 1 have attached a previous Grading and Drainage Plan (dated 2/1/2019) that can be compared to current plans showing measures taken to minimize impacts as discussed. Please let me know if additional information is requested and we will attempt to accommodate. As you can imagine based on the reasons above, this site is highly constrained which increases development costs; therefore, maximizing the number of units to offset those costs is the main driver for the shape of the northern building. Going higher would be the natural solution to modify the footprint in order to avoid the additional impacts, but the zoning ordinance prohibits the additional height. If you have any other questions or need anything else, please let me know. Thanks, Chris Chris Tinklenberg, PWS Kimley-Horn 1200 South Tryon Street, Suite 200, Charlotte, NC 28202 Direct: 704 409 1802 1 Mobile: 910 538 9836 From: Johnson, Alan <alan.johnson@ncdenr.gov> Sent: Monday, July 22, 2019 4:54 PM To: Tinklenberg, Chris <Chris.Tinklenberg@kimley-horn.com> Subject: RE: [External] RE: NoDa DWR# 19-0732 Listen I am heading out on August 2nd for more leave. So it you can get the engineer to answer the avoidance question. I will kick this thing kicked out. From: Tinklenberg, Chris [mailto:Chris.Tinklenberg@kimley-horn.com] Sent: Thursday, July 18, 2019 2:57 PM To: Johnson, Alan <alan.iohnson@ncdenr.gov> Subject: [External] RE: NoDa DWR# 19-0732 External email. Do not click links or open attachments unless you verify. Send all suspicious email as an attachment to report.spam@nc.gov Hey Alan — sorry about that. Construction plans definitely get jumbled. I've attached a marked -up site plan sheet which highlights those areas and calls -out the permanent impacts. The stream flows through the wetland and functions as a stream/wetland complex. You can also refer to Figure 5 that I included with the ePCN submittal. It's part of the compiled PDF that I uploaded in the 'Miscellaneous' section of the ePCN. If you're not seeing it please let me know and I'll forward it along. It's certainly easier to read than the plan sheets. I've contacted my engineers regarding pipe details for the stream impact. I think there may be a bit of semantics here, mostly inconsistency on my end and information that was lost a little in translation from the engineers to myself. The main stream impact (204 If) results from the installation of a 175 If, 30" reinforced concrete pipe, not your standard culvert crossing. I referred to this impact in the cover letter as both a pipe and culvert, so I hope I didn't confuse. Calling this a culvert is not really appropriate. Also, Dave Shaeffer has requested that this project be authorized under NWP 14 (WQC 4135) for the impacts associated with linear transportation and NWP 18 (WQC 4139) for the retaining walls and grading in the southwest corner of the northern half of the project. He feels that those permits are more appropriate for the proposed activities. Are you able to provide your authorization with those updates? Need anything from me in order to make that change? If you have other questions, please let me know. Thanks, Chris Chris Tinklenberg, PWS Kimley-Horn 1200 South Tryon Street, Suite 200, Charlotte, NC 28202 Direct: 704 409 1802 1 Mobile: 910 538 9836 From: Johnson, Alan <alan.iohnson@ncdenr.gov> Sent: Thursday, July 18, 2019 11:37 AM To: Tinklenberg, Chris <Chris.Tinklenberg@kimley-horn.com> Subject: NoDa DWR# 19-0732 Can you provide a site plan without all the extraneous construction information (0-1), with the buffers, SW layout, wetlands, and stream. The stream is not pointed out. It appears to be just part of the wetland (based on the buffer indicated). 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X69 - - - - - INV OUT: 682.26 - - Duke Pow 469 -716 % 11 jl---i_1,�. _ 678 679 - - - - - - - _-- - - \� PROPOSED OVER SIZED PIPE TO \ \ ° _ _ .- o� ger D B, 2935 P9' \ �� 11 l l 1 1111 / Il _J, E- 80=681 _ _ _ BE USED FOR DETENTION. ♦ , j - 7171 682 683 684_ 8 - - 682 C_ - - - - - -'C 9 / / / // = = 686 687 688. 689 - s 3 - - - �V-r686y87688 ♦ 07 JB \ ° o - -718 /// /// /// ///// 691 689 RIM: 692.68 ♦ ,�Q' 9 INV IN: 682.26 ///��_ - - - - s - o ,69j INV OUT: 682.26 - 719 /�////////o';//�///// - - �Zy- _ _ - - - 93 _ /�/^0// //; �/°po _692, ♦ _ / F � i li,, Q, -- - 17T0 M/�CCO buffer � s _ � � s93` s � . \ys ��� � � � � ALLWIN, LLC X720 /lll�+00 c - -2+00- - 692.89 3+00 693.03 a' -� 92 s ♦\\ �' D.B. 8598 Pg. 822 o o///j �_- - - - �\ 693.00 - - 4+00 �� la p 89s \ _ ��\ �� ee Tax I.D. 08303133 Q Grate 722.43' l/// /// i, \'� v 5+00�_ i �� F o 1' 88 6 8S ,"`' �� - \�\�� \ I.E. �n 718.7 n ♦ 6g0 � Q ////// // o+=F or 693 - - 6 \or°q s8 C' ♦ 6 �> I.E. out 718.6 � /// // / // � � � � � � 93 ♦ 6 ♦ � _ '693.28- l \ 6 A 6 /tor Ji 3 / ll�llllll/ 11 l�� /L ��� - y - _ _ - +00 83 s8/Otte w 00 -FES -� ♦ �♦ T_ ,722 /// // / / / - \ \ 2 of // / ////// //�/ /,, / �� RIM: 684.21 � A 18• /�ll////// 1 11/ fp"' 696 // ��A \ \ l o � �/cb 695.00EW / _ \ \ 68 s INV IN: 682.00i I I /� 6 FFE 694.00 705.00TW'.� \ \ ♦ / I / / / r - - 694.00BW 694.00BW� 'A00 v ♦ ♦ � - - 680.00TW � ♦ � \ L o Cp 97 FFE 694.00 705.o0TW ♦ 679.0_013 ; �` 705.0 TW FFE 694.00 \ Q R//////�///��////////�;� 6 8 / _ VA 694.00BW 705.0 Tow S♦- �� \� - /� / 699 704.00TW RIM: 704.95 \ 694.008 \' CtO 01 -CS Rim 82.5 �� ♦ \ ._ �� A / /// ///� / / cV A -_a' tJ' rJRIM: 692.25 ��� ��/////// 11/l�/l/�/l/ll/// I 694.00BW FFE 705.00 INV OUT: 698.07 p INV IN: 682.26 ���i666. \ ♦ �♦ r to 722.3\� ///// /// ///// 70 - \ 1-04 V OUT: 682.26 \ ♦ L s u 2� �'0141 �♦ o out 719.5 ��///1///l�(l /// 705.00TW 04.37 �� �� oo 13� AA. 4 ♦ ♦ eii %C@ ✓1111 11 1 l� /�l l)l /,/ a, 694.00BW 704.32 J �8 ♦ ♦ U A � \ �`JJ I/ /I 11 1 1 /r ✓ O� x0 \ CUSTOM BOX DETAIL FOR 01 -CS , ♦ �.� p \ 704.35�� 0 TO BE PROVIDED IN LATER ♦ �•�2 9 �G' _ o �J��/ // //✓ , ` 704.38 \ . 04 35 \F �� SUBMITTAL ♦ �� �° 704.400 \ o 704.15 ^ 704.23 \ \ \ r ♦ v- 03.99 \ \ \ \ 704.17 704.32 \ V 692.00TW� o 6 �/ ^� ♦ I n 03.99 p \ ♦ \ 704.15 703.84 678.00BW e� pr�k V rllo�, i ♦ v ♦ \ Q I \ 9j\ 704 704.24 7 04.30 704.15 704.14 704.38 ��� 1 I \ 1 r k /Oc we//s for/hg ° 7 68 69 704.00 703.83 704.08 -_ FIFE 705.00 704.30 703.84 704\� '` e STORMTRAP ST2 DOUBLETRAP�C` 9 703.76 704.07 I P _ 704.14 703.90 �� ��01 \ e APPROX. 249 LONG. 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