HomeMy WebLinkAboutWPO201700039 Correspondence 2004-10-19Glenn Brooks
From: Glenn Brooks
Sent: Tuesday, October 19, 2004 10:57 AM
To: 'John Beirne'
Cc: tim@rivannaengineering.com; 'dfranco@thekesslergroup.com'; Mark Chambers
Subject: RE: Hollymead -SWM#2 design modification
I agree with Mark on the issue below.
Regarding the revised computations and structure height to accommodate Drainage Area V
(Hollymead area D). This looks OK, and the plan can be approved as submitted, with one
condition. I ask only that the post development drainage area map be revised to include
more detail - specifically the drainage sub -areas that are called out in the
computations. We will need these to accurately keep tabs on future development
submittals.
Thank you.
Glenn Brooks, P.E.
Senior Engineer
Albemarle County
-----Original message -----
From: Mark Chambers
Sent: Tuesday, October 19, 2004 8:03 AM
To: 'John Beirne'
Cc: Glenn Brooks
Subject: RE: Hollymead -SWM#2
I would rather keep the secondary spillway for a margin of safety if the other becomes
clogged. I don't know how VDOT would feel about removing it and that's important in this
instance. I say leave it in.
Glenn, your thoughts? Your call.
-----Original Message -----
From: John Beirne[mailto:john@rivannaengineering.com]
Sent: Friday, October 15, 2004 10:21 AM
To: Mark Chambers
Cc: Tim Miller; Katurah Roell
Subject: Hollymead -SWM#2
Mark,
We were going over the current set of calcs that were submitted for SWM#2 at the
Hollymead Towncenter and found that by raising the crest of the outlet structure 1' as
was suggested by Glenn and Don Franco, which is how the structure is designed for the
current submittal, that the emergency spillway structure is no longer necessary. By
eliminating the structure it will change the routed flow for the 10yr storm from 5.29cfs
to 18.75cfs. When combined with the uncontained area the flows go from 51.11cfs to
65.59cfs which is still well below the pre -development flow of 86.21cfs. It will raise
the water surface elevation from.558.81 to 559.29 for the 10yr event and from 559.64 to
559.68 for the 100yr event. The 2yr event remains the same for flow and water surface
elevation. So what I'm getting at is that we would like to eliminate the emergency
spillway structure in SWM#2. Let me know what you think. We need an answer as soon as
possible since these structures are going to be ready to be installed in the next couple
of days.
Thanks,
John Beirne
Rivanna Engineering
(434) 984-1599
& Surveying, PLC
1
Pagel of 4
Glenn Brooks
From: Glenn Brooks
Sent: Wednesday, March 04, 2009 2:26 PM
To: Pam Shifflett
Cc: Ray Lilly; Amy Pflaum
Subject: RE: Airport Road Office Plaza - SWM
We do not appear to have a SWM bond for HTC pond 2 specifically, but we do have a number of SWM and E&S
bonds for sites which make use of this pond, and I propose holding all of them until the basin is completed, or
otherwise bonded. The assumption appears to have been made that the pond was bonded by Dr. Hurt with Area
C, and subsequent plans were not required to bond.
The sites which make use of this pond appear to be
Abington Place, all phases
Rosewood Village
Hollymead Town Center Area C, all blocks, phases, and grading
The Post Office site
The church site
Roads (VDOT was originally included in arrangements with P.O. Land Trust —aka Hurt)
The work remaining on this pond is mainly plantings and some repair. I estimate about $45,000.
Here is the drainage area for the pond, from the comps by Rivanna Engineering & Surveying Inc.
3/4/2009
Page 2 of 4
From: Amy Pflaum
Sent: Wednesday, March 04, 2009 11:07 AM
To: Glenn Brooks
Subject: FW: Airport Road Office Plaza - SWM
From: Pam Shifflett
Sent: Wednesday, March 04, 2009 7:59 AM
To: Amy,Pflaum
Cc: Ray Lilly
Subject: FW: Airport Road Office Plaza - SWM
Amy:
Below is an e-mail from Frank Pohl about the basin in Hollymead Town Center Area C (Ray confirmed this is the
basin he is referring too). We have a WPO bond for "Hollymead Town Center Area C Mass Grading Plan" (Plan
#2301) but this bond only covers erosion control. There is no bond in place for converting the sediment basin to a
3/4/2009
Page 3 of 4
stormwater basin. Attached is an e-mail Allan Schuck sent me in 2007 — I never heard anymore about the bond
amount, agreement, etc.
Before I tell Frank we have no stormwater bond, only erosion, I'd like to confirm we are not approving plans in this
area so I can tell him the stormwater bond will be required, along with a stormwater agreement, before future
approvals will be granted in this area, which I believe would affect approval of the subject project.
Any assistance you could provide would be greatly appreciated.
Thanks
Pam
From: Ray Lilly
Sent: Tuesday, March 03, 2009 4:21 PM
To: Pam Shifflett
Subject: RE: Airport Road Office Plaza - SWM
2301
Ray Lilly
Senior Engineering Inspector
434.296-5832 ext. 3287
434.989.1534
rlilly c4albemarle.org
From: Pam Shifflett
Sent: Tuesday, March 03, 2009 3:14 PM
To: Ray Lilly
Subject: FW: Airport Road Office Plaza - SWM
I'll need your help identifying what plan would have covered this basin in order to confirm if the basin is bonded.
Can you help/
From: Frank Pohl [mailto:Frank.Pohl@timmons.com]
Sent: Tuesday, March 03, 2009 3:03 PM
To: Ray Lilly; Pam Shifflett
Cc: Trey Steigman; Ammy George; Sam Saunders; Craig Kotarski; Philip Custer
Subject: Airport Road Office Plaza - SWM
Ray,
This is a follow up to the discussion we had regarding the stormwater management pond at the Hollymead
Towncenter as shown in the attached aerial. As mentioned, our client is considering entering into an agreement
with the current owner to utilize the pond for the Airport Road Office Plaza development's site quantity
stormwater requirements (detention). Prior to doing this we would like confirmation that there are no issues
from the County's perspective with regards to the construction or current operation & maintenance of this
basin.
There can be great risk in a land owner entering into such an agreement. Our client is performing due diligence
to minimize their risk by identifying any issues with this particular basin.
3/4/2009
Page 4 of 4
Are there any obligations remaining from the developer on this pond (i.e. side -slope grading, E&S
measures)?
Is there anything from a construction standpoint remaining to be completed to the basin (i.e. sediment
removal, side slope stabilization, etc.)?
I have copied Pam on this to confirm what bonds are in place — Pam can you please verify this for us?
Thank you to all,
Frank V. Pohl, PE
Senior Project Manager
TIMMONS GROUP
YOUR VISION ACHIEVED THROUGH OURS.
The Ix Building
919 2nd St. S.E.
Charlottesville, VA 22902
Main: 434.295.5624
Direct: 434.327.1687
Fax: 434.295.8317
Cell: 434.414.0357
E-mail: frank.pohl(o),timmons.com
www.timmons.com
3/4/2009