HomeMy WebLinkAboutWPO202100063 Correspondence 2023-03-02John Anderson
From:
John Anderson
Sent:
Thursday, March 2, 2023 10:50 AM
To:
Elizabeth Wassman; Charlie Armstrong
Cc:
Keith Lancaster
Subject:
WP02021-00063 : RE: Dunlora VSMP -- GEOTECHNICAL
Thanks, Liz —we appreciate your support; feel free to share with others.
Charlie,
As ollow-up to 1-Mar 2023 conversation, county — RGA (Liz Wassman, J. Anderson):
Areas requiring geotechnical examination or exploration for purpose of preparing geotechnical design of retaining walls
(multiple locations), or sand filters (multiple locations), per VA DEQ Stormwater Design Specification No. 12, Sec. 6.2;
pg. 7 of DEQ SPEC, Albemarle advises:
1. Amendment #1 to WP0202100063 (showing full -development; i.e.: roads, drainage, ESC, SWM, calculations,
calc. tables, compliance summaries, VRRM.xls, SWPPP, etc.) approval is possible without geotechnical test
information, or retaining wall design, provided:
a. All review comments, excepting those relating to geotechnical investigation, or requirement to submit
PE -sealed geotechnical retaining wall designs for walls that support lots, or are adjacent to /part of SWM
facilities, or that are adjacent to PLs, are addressed.
b. A SWM Maintenance Agreement is completed ( recorded by Albemarle —pls. coordinate Agreement with
Ana Kilmer — akilmergalbemarle.org ).
c. Re. GEOTECH:
i. For retaining walls not possible to design at this point (pls. consider /include Plan Note/s or labels
to the effect):
1. PE -seal design is required for retaining wall ht. > 4-ft.
2. Walls are assumed cast -in -place reinforced concrete design, unless replaced by a later
alternative wall type (PE -seal wall design).
3. PE -seal retaining wall design is required for walls > 4-ft ht., prior to receivine Phase 1
final subdivision plat approval.
4. Any retaining wall that spans lot lines requires a Wall Maintenance Agreement between
owner of development and current owner of lots (developer).
(Agreement attaches to the land. Agreement shifts maintenance of walls that span lot
lines to Dunlora Village HOA, eventually.)
5. Evidence of recordation of retaining wall maintenance agreement is required prior to
receiving Phase 1 final subdivision plat approval.
6. Walls spanning lot lines require maintenance easements, or must be built discontinuous
at lot lines.
Note: Wall maintenance easement and Agreement may be recorded simultaneous with
Dunlora Village Phase 1 final subdivision plat.
7. PE -seal wall design will be provided to Albemarle Engineering Division at earliest
convenience.
8. PE -seal wall design will be provided to Albemarle Engineering Division with or prior to
first final subdivision plat for Dunlora Village (Phase 1).
9. PE -seal wall design (walls within Phase 1, at a minimum) is prerequisite to (Phase 1)
final subdivision plat approval at Dunlora Village.
10. Building permit approval is coordinated with and through Building Inspections Division,
not Engineering Division.
11. Walls in any zoning district are limited to 10-ft. height overall. Ref. 18-4.3.3.A. Wall
design will be evaluated against requirements at 18-4.3.3.
12. Walls in steep slopes overlay district (slopes > 25%) are subject to standards at 18-30.7.5,
and will be reviewed accordingly, as applicable.
13. A building permit is required for any retaining wall > 3-ft. ht.
ii. Timing of geotechnical testing required by VA DEQ Spec. No. 12 Sec. 6.2 is at RGA /design
engineer /developer's discretion.
1. Pls. furnish evidence of test and test results (i.e., proposed filter locations are suitable,
vis-a-vis water table, bedrock, soil) at earliest convenience.
2. Pls. furnish test results to Engineering, at latest, prior to or with initial Phase 1 final
subdivision plat submittal.
3. Note: Delaying geotechnical investigation poses risk since BMP practices may require
relocation, or design revision /WPO plan amendment.
4. Given risk, it is possible WP0202100063 Amendment #2 once approved, may require
further Amendment, which may delay Phase 1 final subdivision plat approval.
We hope this helps —thanks, best, J. Anderson
John E. Anderson, PE I Civil Engineer 11
Department of Community Development I County of Albemarle, Virginia
401 McIntire Road I Charlottesville, VA 22902
434.296.5832 ext. 3069
From: Elizabeth Wassman <EWassman@roudabush.com>
Sent: Thursday, March 2, 2023 9:19 AM
To: John Anderson <janderson2@albemarle.org>
Subject: RE: Dunlora VSMP
Good morning, John!
My apologies for not sending the Bond amount for Belvedere Block 10 Clearing Plan sooner. I've attached it to this
email.
Any chance I could get you to reply via email to our discussion we had over the phone yesterday? I just want to make
sure I've got the right procedure in place to help Charlie out.
Thank you so much!
Liz
From: John Anderson <!anderson2@albemarle.ors>
Sent: Wednesday, March 1, 2023 2:22 PM
To: Elizabeth Wassman <EWassman@roudabush.com>
Subject: RE: Dunlora VSMP
Hi, Liz, just left v.mail —sorry to have missed.
I'll call at 2:45, realize you have Appt. at 3.
Thanks, best, JA
From: Elizabeth Wassman <EWassman@roudabush.com>
Sent: Wednesday, March 1, 2023 2:04 PM
To: John Anderson <landerson2@al1bemarle.orx>
Subject: RE: Dunlora VSMP
Either way, my number is 703-919-5366!
I'm sure we'll be in contact in the future!
Liz
From: John Anderson <janderson2@albemarle.org>
Sent: Wednesday, March 1, 2023 1:58 PM
To: Elizabeth Wassman <EWassman@roudabush. com>
Subject: RE: Dunlora VSMP
Hi, Liz,
Free to chat at 3, or 3:30? Glad to follow-up with email, but free to discuss? —if so, pis., best time, best tel.?
Thanks!
From: Elizabeth Wassman <EWassman@roudabush.com>
Sent: Wednesday, March 1, 2023 1:02 PM
To: John Anderson <ianderson2@albemarle.ore>
Subject: Dunlora VSMP
Good afternoon, John!
I hope you're doing well. I wanted to go over a few potential questions regarding the approvability of the VSMP with the
retaining walls & geotechnical requirements.
We are running into a bit of a snag because we understand that we'll need geotechnical data (namely soil proctors and
suitability) for the walls, and their designs, of course. I think the biggest thing being Charlie won't have access to the
locations of the walls until later in the construction process as he doesn't own most of the Dunlora property. Is there
any way in which you would be comfortable in approval with a statement or detail calling for soil investigation further
along the process of construction? At this point, we're trying to get a VSMP approved as quickly as possible (as I know
you're aware). I know there's only so much you can do, so any suggestions would be super helpful.
Additionally, I wanted to make sure that a letter from our geotechnical engineer stating the depth of rock, the depth to
water table and soil suitability would be reasonable for the approval of the extended detention basins and sand filters? I
want to make sure we're on the same page.
Thank you so much, I look forward to hearing from you
Liz