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Home My WebLink AboutWPO201300079 Review Comments 2014-10-22 Glenn Brooks From: Glenn Brooks Sent: Wednesday, October 22, 2014 11:33 AM To: 'Stephen Werner'; 'DHines @bohlereng.com' Cc: Dan Tucker; Lance J. Koth; eric.millard @deq.virginia.gov; 'shane @brent.us'; 'brian @brent.us'; 'vincent.d.pero @usace.army.mil'; Greg Harper; Mark Graham Subject: RE: Addendum - Preliminary Plan, Moore's Creek Erosion & Buffer Program Attachments: RPT-14 1009-GB-Addendum-Preliminary Plan-Moore's Creek Erosion & Buffer Project- SGW.pdf Stephen and Daniel, I was not aware until our meeting last Friday that you considered this an actual submittal for review and approval. I have therefore,examined it after receiving your print version on Tuesday,yesterday. Please incorporate this into your other document, rather than simply attaching as an addendum. I think the County has indicated that Figures 8, 9, 10, 11 and 12 were not acceptable to the County in the original document,so these would need to change or be removed. The stacked stone and live soil lifts in the addendum look fine. The schedule looks fine. Please include the obvious buffer enhancements we discussed previously(on-site) in the document. These would be repair of the failed basin and pipe outfalls near the bridge, and removal and replanting of areas overgrown with vines, which was northeast of the bridge. It might help to formally establish the trail areas also, if these are to be kept. Thank you, Glenn Brooks, P.E. County Engineer Albemarle County From: Stephen Werner [mailto:sgwerner@ gmail.com] Sent: Thursday, October 09, 2014 9:28 AM To: Glenn Brooks Cc: Dan Tucker; Daniel Hines; Lance J. Koth Subject: Addendum - Preliminary Plan, Moore's Creek Erosion &Buffer Program Glenn: Attached is the Addendum to the Preliminary Plan for the Moore's Creek Erosion& Buffer Program. It includes a program schedule. Please contact me, if you have any questions. Steve Stephen G.Werner,P.G. Geo-Environmental Consulting Services, LLC 7614 Cornwall Road,Richmond,VA 23229-6718 804-869-2246; sawerner(a gmail.com 1 Glenn Brooks From: Glenn Brooks Sent: Wednesday, October 22, 2014 4:49 PM To: 'DHines @bohlereng.com' Cc: mjoyce @bohlereng.com; dan @sjcollinsent.com; Mark Graham Subject: RE: 5th Street- Meeting on Thursday Daniel, Looking over the proposed filterra and sand filters designs I have a couple of concerns for tomorrow's meeting; You are making extensive use of filterra unit FTIB-C, included below. This unit appears to be a break from the filterras we are used to seeing,which are designed to overflow into a standard inlet. Instead,this one tries to incorporate the inlet. It is not clear how the inlet opening and overflow will be designed,as standard inlets designed for spread and capture have larger,variable width openings. They need to be sized to capture the flows expected to get into the rest of the system.The pipe system should also be our standard storm drain, minimum 15" diameter,with manhole access, which does not appear in the detail. Also,for those areas using standard filters,a typical sump setup is to have filterras on either side of the standard inlet (which is not always the most efficient if flow goes directly into the standard inlet, but with careful grading can work). It is not clear what the setup is here. Contrast drainage areas A23A and A25A, included below. One has a standard filterra,and one has FTIB-C, but they look the same on the drawing. 1 OY ALL LENGN4 FILTERRA LENGTH 1 r._....... A I I I J f �F�'�1��C r /��'i g= A L CURB { .,,..,. ,..«„. INLCr OPENING FLow PLAN VIEW TREE GRATE TERRAFLUME AND FRAME BYPASS C1.EANOUT MULCH LAYER WEIR TRAY PIPE COYER INCTION -IAM8ER 1r PIPE it 1—II-1 I�i aI t= It n 1--€.---11 n 1I. rI_�a I=il la Ik rl H 2_1 1..VARIES E R li it II- I€ 11 1°` --11-11,-11, t 1' 1 L_. II = I 6�-II II II i 1 71-If E6 t I 1-1-1111'111-:11111 t }I 11 -ID- JI-1t Ft 13 l: I 1 -ll r,; F31TI RRA EtfG IEERI±D Ski —AA-6 pERFOFt,AT'ECf A KYMf.. --.I.�.i �YMV,rM.Wiw 'ANYMNw A�41M� sae yp C.0 B5 • 1:3:1 • • :�5w�• 4.f X.4M4.�- «wM,Y•MMF> —.—.—I"sl : ,o A.o89 � cow The sand filters have a variable depth due to the circular pipe. This should be accounted for in the dimensions. One way to do this would be to reduce the width by approximately 1' accounting for half the chord difference between 3' and 1', the depths of the sand bed and under-drain. This results in slightly longer filter lengths. Also, is there a method or 2 • assurance whereby our inspectors caee the drainage areas broken up as you ha a indicated on plans when the building and filters are constructed? In the overall water quality computation, please include the hidden columns in your spreadsheet table. I need to see how the "load removed" and other figures are computed, to verify the correct removal percentages per facilities, and treatment train. Thank you, Glenn Brooks, P.E. County Engineer Albemarle County From: DHines @bohlereng.com [mailto:DHines @bohlereng.com] Sent: Tuesday, October 21, 2014 7:14 PM To: Glenn Brooks; Mark Graham Cc: vlong @williamsmullen.com; mjoyce @bohlereng.com; dan @sjcollinsent.com Subject: RE: 5th Street- Meeting on Thursday Sounds good. 3:00pm it is. I am planning to bring the sets with me for us to reference and review the comments. Hopefully that will reduce the time needed to review the submittal. Assuming all is good when we review on Thursday,we will submit after the meeting. If there are minor adjustments,we will revise and bring down the sets Friday or Monday. Thanks Glenn! Daniel R.Hines,P.E. Project Manager Bohler Engineering 28 Blackwell Park Lane,Suite 201 I Warrenton,VA 20186 P : 540-349-4500 I M : 540-454-9642 I dhinesPbohlereng.com From: Glenn Brooks [mailto:GBROOKS @albemarle.org] Sent: Tuesday, October 21, 2014 5:09 PM To: Daniel Hines; Mark Graham Subject: RE: 5th Street- Meeting on Thursday I have time at 3pm on Thursday. At some point there will need to be an official submittal. I need to reserve some time to review that. From: DHines @bohlereng.com [mailto:DHines @bohlereng.com] Sent: Tuesday, October 21, 2014 4:11 PM To: Glenn Brooks; Mark Graham Subject: 5th Street- Meeting on Thursday Gentlemen, 3 This is just a follow up to my e-mail yesterday. Does 3:30pm on Thursday work for you to meet and review the final plans? We are making PDF's of the plan sheets now. I will send out the PDF's this afternoon/evening for your review prior to our meeting on Thursday. Thanks! Daniel R.Hines,P.E. Project Manager j BOH LER 28 Blackwell Park Lane,Suite 201 I Warrenton,VA 20186 P : 540-349-4500 I M : 540-454-9642 I dhines@bohlereng.com Serving the East Coast Visit our new website! Confidentiality Note:This e-mail,and any attachment to it,contains confidential information intended only for the use of the designated recipients, which information may also be privileged.If the reader of this e-mail is not the intended recipient, the document has been received in error and any use,review,dissemination,distribution,disclosure or copying of this message is strictly prohibited.If you have received this e-mail in error,please notify the sender via reply e-mail and immediately delete this e-mail from your system. 4