HomeMy WebLinkAboutSUB201400201 Approval - County Preliminary Plat 2015-02-27COUNTY OF ALBEMARLE
Department of Community Development
401 McIntire Road, North Wing
Charlottesville, Virginia 22902 -4596
Phone (434) 296 -5832 Fax (434) 972 -4126
February 27, 2015
Scott Collins
Collins Engineering
200 Garrett Street, Suite K
Charlottesville, Virginia 22902
RE: SUB2014 -201 Avinity II- Preliminary Plat
Mr. Collins:
The Agent for the Board of Supervisors hereby grants administrative approval to the above referenced
subdivision plat.
This approval shall be valid for a period of five (5) years from the date of this letter, provided that the
developer submits a final subdivision plat for all or a portion of the site within one (1) year after the date
of this letter as provided in 14 -226 of the Subdivision Ordinance of the County Code, and thereafter
diligently pursues approval of the final subdivision plat.
The final subdivision plat will not be considered to have been officially submitted until the following
items are received:
1. A final subdivision plat that satisfies all of the requirements of 14 -226 of the Subdivision
Ordinance.
2. A fee of $1,230.
Please submit ten (10) copies of the subdivision plat to the Community Development Department. The
assigned Lead Reviewer will then distribute the plans to all reviewing agencies. Once you receive the
first set of comments on the final subdivision plat, please work with each reviewer individually to
satisfy their requirements.
The final subdivision plat will not be approved until the following conditions are met:
The Department of Community Development shall not accept submittal of the final subdivision plat for
signature until tentative approvals for the following conditions have been obtained:
Planning Division Approval of (2 copies):
1. A plat meeting all the requirements for final subdivision plats per the subdivision ordinance.
2. [14 -302 (A)(1)] Name of subdivision. The title border on sheet 1 states "cover sheet & site plan ",
revise to subdivision plat.
3. [14 -302 (A)(3)] Existing or platted streets. Provide the right of way note that states it will be
extended to the property line for Avinity Loop to Cale Elementary. Also, provide it for Prospect
Street.
4. [14 -302 (A)(3)] Existing or platted streets. It appears that the 20 foot emergency access
entrance is not fully on the property. Show an easement for this from the adjacent owner, or
clarify if this property is owned by Avinity II.
5. [ 14 -302 (A)(4)] Private easements. Show the landscape easement that is required for the street
trees on the lots.
6. [14 -302 (13)(5)] Zoning classification. Provide the ZMA number on the cover of the plat. Also
provide the proffers on the plat, as they are part of the zoning of the property.
7. [14 -302 (13)(1)] General information. There is a note about the building separation modification,
which was approved with the ZMA. Revise this note to reference the approved modification.
8. [14 -302 (13)(1)] General information. There is a note on the cover sheet that states that curb and
gutter sections are provided on the sheet, however these are not provided. Revise.
9. [14 -302 (13)(1)] General information. Remove all the landscaping and notes from the plat. The
street trees and other required landscaping will either be shown on the final plat, site plan, or
road plans.
10. [14 -302 (13)(1)] General information. Remove the units from the plat. Only the building envelope
should be shown. The attached units will be shown on the site plan.
11. [ 14 -302 (13)(1)] General information. Remove the pavement and sidewalks. Again, the rights of
way and other easement along with the lots should be shown. This is not a site plan, but a plat.
The extra information that is not required, and should not be shown.
12. [ ZMA2013 -016] As part of the private street approval, an easement document must be
submitted to give public access on the private streets, including within Avinity I. Submit this for
review and approval.
Please contact Megan Yaniglos at 296 -5832 if you have questions or require additional information.
Engineering Division Approval of (1 copy of site plan; WPO plan number stated in application):
1. An Erosion and Sediment Control Plan meeting the requirements of Chapter 17 of the Code of
the County of Albemarle
2. A Stormwater Management Plan meeting the requirements of Chapter 17 of the Code.
3. All easements for facilities for stormwater management and drainage control.
4. Road plans.
5. See attached additional comments.
Please contact John Anderson at 296 -5832 if you have questions or require additional information.
ACSA approval to include (3 copies):
The applicant should submit 3 copies of construction drawings along with water and sewer data sheets
to the ACSA (Attn: Jeremy Lynn, PE).
Please contact Alex Morrison at 977 -4511 ext 116 if you have questions or require additional
information.
E911 approval to include (1 copy):
1. The applicant should contact this office with a list of three (3) alternative road names to replace
each instance of Prospect Street. That name is unavailable and for lots 61 -64 a different road
name would be needed instead of Prospect Street.
Please contact Andrew Slack at 296 -5832 if you have questions or require additional information.
Fire & Rescue approval to include (1 copy):
1. Per the note on page one fire hydrant spacing shall be maximum of 500 ft per travel way.
Hydrants shown on plat are greater than 500 ft per travel way.
Please contact Robbie Gilmer at 296 -5833 if you have questions or require additional information.
Virginia Department of Transportation approval to include (2 copies):
1. See attached comments
Please contact Troy Austin at (434) 422 -9782 if you have questions or require additional information.
If you have any questions about these conditions or the submittal requirements please feel free to
contact me at Extension 3004, myaniglos @albemarle.org.
Sincerely,
Megan Yaniglos
Senior Planner
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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: Avinity II, Preliminary Plat
Plan coordinator: Megan Yaniglos
Plat preparer: Scott Collins; Collins Engineering [200 Garrett St., Suite K,
Charlottesville, VA 22902, Scott (cDcollins- engineering.com]
Owner or rep.: Avon Properties LLC, P. O. Box 1467, Charlottesville, VA 22902
Plan received date: 3 Dec 2014
Date of comments: 12 Jan 2015
Reviewer: John Anderson
Plat (SUB201400201)
(A plat is a record ofproperty division or reservation. Code Chapter 14)
1. Ref. Albemarle County DSM, p.18/19 for street and temporary turnaround design options. Link:
hqp:// www.albemarle.org/upload/images /forms center / departments /community_ development /forms /design standards
manual /Albemarle County Design Standards Manual 02Dec2014.pdf -
[The ACDSM was revised 12/2/14, and includes important design information.] From ACDSM:
2. Teniporuy turnaround shall be provided on phwed streets more than 3(XYft in length_ Cul-de -sacs must be provided for
perosanent street ends_ See the graphic below_
Albemarle County Design Standards Manual— Engineering (0—
R=30 ltmin res.Je ml
451 mia oAdccmntertU
' R =7Q It mn
-UrHi2yM Area
r l�r R= 3Qnmin _
iJnp7.ed ,We2 fj
' m t
Surface
CamDletety Raved ?'anger Unpaved -
UnCanErIC BWIL Cul•dR3aG pllsft Bulb Gul•chp'we
T -lype lurnarounds and branch -lypc turnarounds
have been disconlinued, as rnnellecllve. l'OOr
construction driveways and panting have made
them Mneflectne.
All dimensions are subject to approval by the
Department of Fire and Rescue.
* 25' radii added by the County
Engineering Review Comments
Page 2 of 3
Cul -de -sacs are required for permanent street ends. Temporary turnarounds must conform to options shown
in DSM (image above). Revise street and temporary turnaround designs per DSM.
2. Amend and supplement Asphalt Paving detail, sheet 6, with pavement design/classification table based on
Avinity II final build -out average daily traffic (ADT) projections.
3. Eliminate 10 parking spaces on Avinity Loop N of traffic circle. Parallel parking along streets is a design
option; perpendicular parking is not an on- street parking option.
4. Provide 3' Min. curb radii for all curbed sections, including those at traffic circle.
5. Few if any storm inlets are visible at traffic circle or sections of Avinity Loop to north. Furnish inlets, or
rationale to support no inlets.
6. Provide date of survey and topography by Roudabush Gale and Assoc.
7. As retaining wall design is integral to both street and SWM facility design, provide sealed structural plans
and retaining wall details for review prior to final plat approval.
8. Stormwater Mgmt Note, sheet 1, requires revision. Reference to upland rain garden is ambiguous. Sheet 5
presents Avinity II SWM facilities: dry Swale, bioretention (both Part IIB), and retention basin (Part IIC).
There is no reference in plans to upland rain garden. Revise. As stated elsewhere, the only available
options for Avinity 11 are Part IIB BMPs. Further, mention of existing stormwater management facility
currently under review is errant. There are no SWM facilities under review. WP0201300044 approved a
Part IIC retention basin. Preliminary plat proposes to replace this retention basin with a Part IIB wet pond.
–see Also advance WPO comments, below.
9. An approved road plan is required. Roads must be built or bonded prior to final plat approval.
10. An approved WPONSMP plan is required.
Advance WPO Comments:
11. WP0201300044, approved 6/19/14, is based upon design criteria found at 9VAC25- 870 -96, Part IIC.
Applicant has submitted conceptual SWM design that proposes replacing rather than modifying approved
SWM facility. WP0201300044 retention basin (Level 11, 4 x WQ Vol.) is not equivalent to a Part IIB Wet
pond. These are different facilities, with different design criteria. Avinity II is subject to water quality and
quantity requirements at 9AVAC25- 870 -65 / -66 (Part IIB). Applicant must show how a wet pond meets
quality/quantity requirements formerly met by approved retention basin, and, in addition, provides that
portion of post - developed stormwater management which, when combined with additional proposed SWM
measures, is needed to comply with Part IIB quality/quantity standards. With this proposal, SWM facility
design approved under WP0201300044 is replaced: only one or the other facility may be built —only one.
Were two separate facilities proposed, review would consider efficacy of each facility: Avinity 11 via Part
IIB facilities, Avinity I via Part IIC facility. Applicant may wish to meet to discuss with Engineering.
12. Provide water balance to assess whether proposed wet pond will draw down by more than 2 feet after a 30-
day summer drought. Ref. Spec. No. 14:
Contributing Drainage Area- A contributing drainage area of 10 to 25 acres is typically
recommended for wet ponds to maintain constant water elevations. Wet ponds can still function
with drainage areas less than 10 acres, but designers should be aware that these "packet" ponds
will be prone to clogging, experience fluctuating water levels, and generate more nuisance
conditions. A water balance should be calculated to assess whether the wet pond will draw down
by more than 2 feet after a 30-day summer drought (see equations in 5ectinn 6.2).
13. Provide Tv calculations for Wet pond, Level 2. Ref, Spec. No. 14.
14. For safety and given proximity to dwellings, Level 1 or Level 2 bioretention cell side slopes may not exceed
3:1. Please revise.
15. Only 11% Avinity II impervious runoff is proposed for pre - treatment (19,725sf). Clarify pretreatment.
Ref, wet pond level 2 design spec. Link:
http: / /www.vwrrc.vt.edu/swc /documents/ 2013 /1DEQ %20BMP %2OSpec %2ONo %2014 WET %20PONDS Final %20D
raft _v 1 -9_03 012011. p df
16. Avoid mixing Avinity I- Avinity II SWM terms. A single SWM facility can be built in a single location. If
facility will treat Avinity II runoff, it must be a Part IIB SWM facility, types listed at BMP Clearinghouse.
A hybrid retention basin II /wet pond is not recognized as a Part IIB SWM facility. —see Also #11, above.
17. Level 1 or 2 bioretention facility appears to treat runoff from attached as well as detached homes. Clarify.
Engineering Review Comments
Page 3 of 3
18. A riprap lined channel is not recognized pretreatment under VA DEQ Stormwater Design Specification No.
14. Do not label as such.
19. Design appears to short- circuit, with spillway riser located near flow path entry from wetland. Ref. Spec.
No. 14. Revise.
20. Provide revised ST2 design. Furnish calculations that show ST2 able to serve Avinity I /II, simultaneously.
Do not simply reference WP0201300044 or prior or approved designs. Clarity is essential.
21. Show stream impacts associated with Avinity II. Do not reference WP0201300044. Republish stream
impact details if necessary. Clarity is essential.
22. Propose Mitigation for Avinity II stream impacts, including any impacts associated with replacement of
Avinity I retention basin (WP0201300044, level 2) with wet pond, level 2.
23. Ref: SWPPP, VESCP, SWMP, PPP, stream buffer Mitigation Plan requirements at: 17 -300, -301, -302,
303; -401, -402, -403, -404, 405, 406]. Provide VSMP Application.
24. Provide SWPPP — abbreviated County template:
hLtp://www.albemarle.orgLupload/images/forms center /departments /Community Development/forms /En ing< eeringand
WPO Forms /Stormwater Pollution Prevention Plan SWPPP template.doc.
Please call if any questions, or to schedule a plan (plat) review meeting.
Thank you.
Sincerely, John Anderson
ACCD — 434.296 -5832 -0069
File: SUB201400201 Avinity II Preliminary_011215
e`
COMMONWEALTH of VIRGINIA
DEPARTMENT OF TRANSPORTATION
1601 Orange Road
Culpeper Virginia 22701
Charles A. Kilpatrick, P.E.
Commissioner
January 6, 20I5
Ms. Megan Yaniglos
Senior Planner
County of Albemarle
Department of Community Development
401 McIntire Road
Charlottesville, VA 22902
Re: SUB- 2014 -00201 Avinity II Preliminary Plat
Dear Ms. Yaniglos:
We have reviewed the preliminary plat for Avinity II dated 11/24/I4 as submitted by Collins
Engineering and offer the following comments:
VDOT comments from a letter dated 8/5/14 for the rezoning request of Avinity II remain
applicable. Those comments are as follows:
• The proposed emergency access off of Route 20 does not appear to be entirely located
within the easement/property boundary.
• BoIlards or some other physical feature should be provided for the emergency access
closer to Route 20 to prevent private vehicular traffic.
• If the emergency access road is to be used as a construction entrance during the
construction of Avinity II, a right turn lane on Route 20 at a minimum will be
required to safely accommodate construction traffic. In addition, an entrance wider
than 20' may be necessary two way construction traffic without impeding traffic on
Route 20.
If you need additional information concerning this project, please do not hesitate to contact me at
(434 ) 422 -9782.
Sincerely,
/1 A"t
U
Troy Austin, P.E.
Area Land Use Engineer
Culpeper District
WE KEEP VIRGINIA MOVING