HomeMy WebLinkAboutWPO201300004 Review Comments 2013-01-16Project Name:
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Review Comments
IVY CREEK UNITED METHODIST CHURCH
Thursday, August 15, 2013
Ana Kilmer
CommDev-Central Ops
Erosion and Sediment Control Plan
7/29/2013 - SWA submitted. Plan has not been approved. SWA needs corrections. No signature information
8/9/2013 - SWA resubmitted and forwarded to CAO
8/12/2013 - SWA approved by CAO
8/14/2013 - SWA signed by County Executive
8/14/2013 - SWA needs recordation
8/15/2013 - SWA recorded in deed book 4399, page 525
Approved
Erosion & Sediment Control:
(Code Chapter 17, Article II)
Y N
Stormwater Management:
(Code Chapter 17, Article ill)
Y N
Enough capture and treatment for on-site areas
Enough detention storage for on-site areas
Sealed hydrologic and hydraulic computations provided
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Mitigation: 1•3(A
(Code Chapter 17, Article III) Adequate
Not Adequate
Y N
Adequate
Not Not Adequate
State standards followed, and Design Standards Manual notes and details
Adequate limits and perimeter measures out of work areas
All stages protected adequately
Adequate channels
Adequate
Not Adequate
Buffers and disturbed areas adequately shown
Adequate plantings at 2:1, or other mitigation provided
COUNTY OF ALBEMARLE
Department of Community Development
401 McIntire Road
Charlottesville, Virginia 22902
WPO Plan Review
Project: Iv Cre t, Ukt ife Me-th sf Chu,rcit‘
Number: v4P 0 3- cot, 0 ‘1.
Date: 11 1471 13
Reviewer: tAi c,k(N el ((vs frAl
This is an abbreviated review comment notice. County engineering staff is available every Thursday
afternoon to discuss details of review. To schedule, please call your reviewer for an appointment
This review attempts to encompass the larger compliancequestions. County staff-does not assume
responsibility for any calculation or plan details, and cannot cover the intricacies of every plan submitted.
Each plan and calculation must have a professional seal and signature to assume these responsibilities.
Phone: ItSii —crit)-5t3d, .at 32 qi
This plan is Approved (please see attached Approval Fact Sheet)
Not Approved
TERRA ENGINEERING
AND 2374 STUARTS DRAFT HIGHWAY,STUARTS DRAFT,VA 24477
ptLAND SOLUTIONS, PC PH.(540)337-4591 FAX (540)337-5291
June 20,2013
J.T.Newberry
County of Albemarle
Planning Division
401 McIntire Road
Charlottesville,VA 22902
434-296-5832
RE: SDP201300004&WP0201300004-Ivy Creek United Methodist Church
Dear J.T.:
Following are our responses to comments provided from multiple agencies
VDOT comments dated 2/22/2013:
1. Entrance geometry adjusted to meet medium entrance volume.
2. F-106 Moderate volume commercial entrance design along highways with shoulders detail added to sheet
C4.0.
3. Sight distance shown in both directions on sheet C3.0. Sight Distance Right 555' Sight Distance Left field
determined by Dennis Seale,VDOT.
Engineering comments SDP201300004(Michael Koslow)dated 3/4/2013:
A.
1) No existing drainage structures present on site.
2) Note added under"Survey&Topography"on C1.0 added. Supplementary survey performed June 26,
2012 and site features visually verified within last year.
3) Benchmark information added to sheet C2.0
4) Deed book and page number information added to sheet C2.0
B.
1) Timber wall no longer required.
2) All structures are labeled with unique number and referenced in chart on sheet C3.0
3) a)Outlet structured moved away from property line.No easement required
b)Proposed Stormwater management easement added to sheet C3.0
c) Site distance easement added to sheet C3.0
4) Detail added to sheet C4.0.Detail 9"Raised Island&parking space demarcations"
5) Sidewalk widths noted on C3.0
6) Limits of paving confirmed on sheet C3.0
7) Redundant drainage conveyance removed.
8) Unique labels added to all drainage structures.
C.
1) Copy of County stormwater maintenance agreement provided to owner. Owner will submit to the
County with required fee.
2) WPO submitted for approval
3) Bond request form sent to owner. Owner to submit to the county.
D.
1) Signed copies to be provided to County upon approval.
E.
1) Traffic volume information is provided on the cover sheer. See ITE trip generation under Project Data
PLANNING+CIVIL ENGINEERING 4 LAND SURVEYING
W W W.TERRAENGINEERING.NET
S.T.Newberry
June 20,2013 N.►° �•+'
Page 2 of 2
Engineering comments WP0201300004(Michael Koslow)dated 3/11/2013:
A.
1) Signed copies to be provided to County upon approval.
B.
1) Existing Conditions sheet C2.0 added to WPO plan set.
2) Note added under"Survey&Topography"on C1.0 added. Supplementary survey performed June 26,
2012 and site features visually verified within last year.
3) Benchmark information added to sheet C2.0
4) Deed book and page number information added to sheet C2.0
C.
1) Contractor staging and parking area added to sheet C5.0.No additional land disturbance.
2) Dust control added to sheet C5.0 and the narrative.
3) Notes added for clarity. Sheet C3.1 and C5.0
4) Silt fence and diversion dike revised per directions in comments.
5) Adequate channel analysis provided on sheet 37 of the stormwater report. Adhere to VESCH MS-19
through plan depiction.
D.
1) Proposed stormwater easement provided on sheet C5.0.References to pond and basin removed.
2) Note removed from detail.
3) Full cross section to scale provided on sheet C7.0. See Bioretention Filter cross section A-A.
4) Pond layout reworked but 2 ft freeboard still not provided. The site characteristics limit the space
available to increase berm height. Due to the small drainage area (approx. 1.3 acres) we feel adding
an emergency spillway and a costly overdesign. 1.16' of freeboard will be provided above the 100
year storm event.
5) 10 year storm event referenced
6) Concrete riser base material and minimum dimensions specified on detail 3 Stormwater Riser Outlet
on sheet C7.0.
7) Forebay provided, see plan sheet C5.0 and details on C7.0
8) Bio-filter floor area added on sheet C5.0
If you have any questions concerning the plan revisions,please do not hesitate to contact us.
Sincerely,
Abram Evans
Xc: Keith Woodard
PLANNING*CIVIL ENGINEERING•LAND SURVEYING
W W W.TERRAENGINEERING.NET
COUNTY OF ALBEMARLE
Department of Community Development
401 McIntire Road, Room 227
Charlottesville, Virginia 22902-4596
Phone (434) 296-5832 Fax (434) 972-4126
Project: Ivy Creek Methodist Church (WPO2013-00004)
Plan preparer: Terra Engineering and Land Solutions, P.C. [tel 540-337-4591]
Owner or rep.: Ivy Creek United Methodist Church
Plan received date: 15 January 2013
Date of comments: 11 March 2013
Reviewer: Michael Koslow
The first erosion and sediment control and stormwater management plan (WPO201300004)
submitted 15 January 2013 has received Engineering Review and does not appear to meet
Albemarle County minimum checklist items for approval. Please adequately address the following
comments for final approval:
A. Title Information
1) Each sheet of final WPO plan set will require a professional engineer’s signature and date for
approval (review copies do not need to be signed).
B. Existing Conditions Information
1) Please include the existing conditions sheet with the WPO submittal.
2) Please visually confirm the topographic survey conditions and note as such on the plans.
Topography over one year old must be field verified by designer.
3) Please include a benchmark location and elevation for reference. An existing utility or other
known position will suffice.
4) Please identify existing easement for existing utilities including overhead electric lines and
underground gas main shown on sheet C2.0 by deed book and page number.
C. Erosion and Sediment Control Plan
1) Please address contractor parking and staging areas. If these areas will require additional land
disturbance, please include those additional land disturbance areas with ESC plan.
2) Please include dust control with ESC plan.
3) Please indicate either trees to remain or trees to be saved for each tree within the limits of
construction of clarity.
4) Please retract silt fence and expand diversion dike behind site east to a relatively flat location
(recommend elevation 550). Silt fence should only be placed in flat locations (ideally along a
contour line).
Engineering Review Comments
Page 2 of 3
5) Please provide an adequate channel analysis for runoff from proposed construction. Analysis needs
to be carried further downstream compared with submitted MS-19 computations shown on p. 28 of
SWM Report dated 10/31/2012. Analysis could be proven given:
a) adherence to VESCH MS-19 requirements (see 4VAC50-30-40, MS-19 sec. b (1)): The
applicant shall demonstrate that total drainage area to the point of analysis within the channel
is one hundred times greater than the contributing drainage areas of the project in question. A
report or plan depiction with analysis to this point could prove channel adequacy.
b) adherence to VA code 10.1-603.4(7): essentially, the required condition for an on-site
solution without looking downstream for a 24 hour 1.5, 2, and 10-year intensity event -
(post-development) Peak flow rate <= Pf*Vf/Vp
Where Pf = peak flow rate in a forested condition
Vf = runoff volume in a forested condition
Vp = runoff volume proposed
D. Stormwater Management Plan
1) Please include a proposed stormwater management easement around proposed bioretention filter
Please note due to proposed filter media, it appears BMP facility is intended to be a bio-filter.
Please remove references to pond and basin from plans and computations.
2) Proposed bio-filter should not include a clay liner as identified on Note 2 above detail 1-5.0 “Bio-
Filter Combined with Detention Basin” on sheet C7.0.
3) Please include a cross section of the proposed berm (could modify SWM Pond Riser Outlet to
show entire barrel length through berm). Please draw cross section to a scale for reference (e.g.
the 10” orifice appears to be shown smaller than it actually is proposed in the detail).
4) Because the bio-filter was designed without an emergency spillway, please increase the berm
elevation to provide 2’ of freeboard above the 100 year storm elevation.
5) On p. 4 of Stormwater Calculations, please specify rainfall event frequency basis for intensities
shown in pre-development and post-development conditions.
6) Please identify dimensions and material for riser base for riser outlet base proposed on sheet C7.0.
7) Please include a forebay for bio-filter proposed on sheet C7.0. Forebay area must be sized for
25% of bio-filter’s floor area. This area cannot be considered for treatment (no filter media);
however it can be included for detention.
8) Please label floor area for bio-filter proposed on sheet C7.0.
Engineering Review Comments
Page 3 of 3
Current Development Engineering is available from 2:30-4 PM on Thursdays to discuss these review
comments. Please contact Michael Koslow at 434-296-5832 ext. 3297 or email mkoslow@albemarle.org
to schedule an appointment.
[17-204.f] An application for an erosion and sediment control plan that requires modifications, terms, or conditions to be
included in order for it to be approved shall be deemed to be withdrawn if the owner fails to submit a revised plan addressing the
omitted modifications, terms or conditions within six (6) months after the owner is informed of the omitted information as
provided under paragraph (B).
File: C:\Users\mkoslow\Documents\Current Reviews\WPO201300004 Ivy Creek United Methodist
Church\CDDE1_ESC_SWM_MAK_Ivy_Creek_United_Methodist_Church_WPO201300004.doc