HomeMy WebLinkAboutSDP202200031 Review Comments Final Site Plan and Comps. 2022-12-01qoH nt 401 McIntire Road, North Wing
Charlottesville, VA 22902-4579
County of Albemarle
o � � Telephone:434-296-5832
COMMUNITY DEVELOPMENT DEPARTMENT WWW.ALBEMARLE.ORG
Site Plan review
Project title:
Rio Point Final Site Plan
Project file number:
SDP202200031
Plan preparer:
Craig Kotarski, PE / Timmons Group [ craig.kotarski@timmons.com ]
608 Preston Ave., Suite 200 / Charlottesville, VA 22903
Owner or rep.:
Rio Point, LLC / 200 Garrett St., Suite 0, Charlottesville, VA 22902
kmillerAstonypointdg.com
Plan received date:
22 Jun 2022
(Rev. 1)
4 Nov 2022
Date of comments:
1 Jul 2022
(Rev. 1)
1 Dec 2022
Plan Coordinator:
Cameron Langille (Rebecca Ragsdale)
Reviewer:
John Anderson
Engineering has reviewed the final site plan and offers these review comments (based upon ISP review comments).
1. General: (FSP) Item 1. persists. Applicant: `Acknowledged.'
a. WPO202200011 approval is required prior to ESP approval. (Rev. 1) Persists. Most recent
WPO202200011 review comments sent to Timmons, 11/11/2022 3:06 PM.
b. An easement plat must be recorded prior to WPO plan approval. (Also, item 5.c., below) (Rev. 1)
May persist. Applicant response (letter d. 10/14/22): `Acknowledged, plat submitted under
separate cover.' Query of review queue does not return easement plat application. As follow -
Please call reviewer to clarify date easement plat submitted.
c. A SWM facility maintenance agreement must be recorded prior to easement plat recordation.
(Rev. 1) Persists. Applicant: `Acknowledged.'
2. C2.1: Please provide a more explicit reference to `VDOT plan.' (FSP) May persist. Applicant response
(letter d. May 6, 2022): `A note has been added to sheet C2.0. The VDOT plan referenced is 0631-002-128,
C502.' As follow- Note does not appear (possible .PDF flattening issue?). If .PDF is not flattened then
saved prior to digital submittal, text may be stripped from the plan. Please confirm Note appears on sheet
C2.0, and comment will be withdrawn. (Rev. 1) Addressed. Note appears beneath scale bar, sheet C2.0.
3. C2.0-C2.6
a. Revise to show Ex. paved walk along J. Warner Pkwy (C2.1). If easement exists over this walk,
please label easement and provide deed bk.-pg. ref. to (public) sidewalk easement. (FSP)
Addressed.
b. Provide existing contour labels. No elevation is provided across existing conditions sheets.
Additional comments possible. (FSP) Addressed.
c. Revise steep slopes label/s to read `preserved steep slopes.' (C2.3) (FSP) Addressed.
d. Revise typo at WB. 173 to read DB. 173 (C2.4). (FSP) Addressed.
e. Label preserved steep slopes (C2.5). (FSP) Addressed.
f Revise parcel label ref. to Helena Ottillia Wetsel et als, consistent with county real estate records
(and C0.0) which identify TMPs 06100-00-00-16700 and 06100-00-00-167CO as owned by Rio
Point LLC. (FSP) Addressed.
4. C4.0
Engineering Review Comments
Page 2 of 4
a. Revise `GIS Critical slopes — preserved' label to read `GIS Preserved steep slopes.' Critical
slopes exist in rural districts, steep slopes in development districts, and different review and
construction requirements apply to each category (steep v. critical). (FSP) Addressed.
5. C4.1-4.6
a. Label internal travelways `private access.' (FSP) Addressed.
b. Provide private access easement consistent with sheet 1, ZMA2019-00008 Application Plan.
(FSP) Addressed.
c. Label ACSA utility easements. Label ACSA easement width. A separate easement plat
application is required for ACSA utility, SWM, and public drainage easements. (FSP) Partially
addressed. As follow-un: Please submit easement plat with easement plat application and review
fee at earliest convenience. (Rev. 1) May persist. Applicant: `Easement plat submitted under
separate cover. Plans will be updated with DB & PG once plat is approved.' See item Lb. above.
6. C4.2
a. Recommend Open Space 1.1 ac. label be revised as needed to reflect <L l Ac. if future Rio Rd. E.
/J. Warner Parkway roundabout consumes a portion of Open Space. Paved roadway /public RW
likely do not qualify as Open Space. (FSP) Withdrawn. Applicant: `Label has been revised per
Parks Department comments. Portion of frontage will be dedicated to right-of-way. Open space
calculation matches approved Application Plan with the rezoning.'
b. Recommend C4.2 include line -type /label that depict future Rio W./J. Warner Pkwy. roundabout,
consistent with approved Timmons Group ZMA Application plan, sheet 1. (FSP) Withdrawn.
Applicant: `The roundabout layout was conceptual and not designed or approved. It was included
for reference on the Application plan as requested by the County. This plan reflects the existing
conditions per date of plan submission.'
7. C4.4
a. Provide (internal development) roundabout inscribed circle linework, consistent with Min, radius,
Figure 2 (table) at VDOT Roundabout Design Guidance, Version 1. 1, March 2014. Label
inscribed circle R and check to ensure R attains Min. inscribed circle value (45' — 90' R). (FSP)
Addressed.
b. Provide, show, label CG-3 Modified Truck Apron curb detail (for internal roundabout), ref.
VDOT Roundabout Design Guidance, Figure 7. (FSP) Addressed.
8. C4.5 (Also. C4.0)
a. Separate Rio Commons townhouse development is shown. Please include ref. to SDP202100045
on C0.0, C4.0, C4.5 to avoid any misunderstanding that Rio Commons is separate and apart from
Rio Point development. (FSP) Addressed.
9. C4.7
a. Revise sheet index (key map) consistent with C4.8 sheet index, which is correct. (FSP)
Addressed.
10. C5.0
a. Review reverse slope bench requirements at 18-4.3.3.C.1. and provide design as needed when any
2:1 slope exceeds 20' (vertical interval), any 3:1 slope exceeds 30', or any 4:1 slope exceeds 40'.
(FSP) Addressed.
11. C5.1+
a. Multiple SWM facilities shown on C5.0 series will be reviewed with W00202200011. Please
ensure any revisions to the WPO plan translate to FSP proposed contours. (FSP) May persist.
Applicant: `Acknowledged.' (Rev. 1) Addressed /NA. Applicant: `Acknowledged, at Timmons
the same parent file is used for printing FSP and WPO. Any revisions will be reflected on both
plans.'
b. With ESP, please limit proposed retaining wall ht. to 10' Max (18-4.3.3.A.). (FSP) Addressed.
c. Provide PE -sealed retaining wall plans (required for Engineering to recommend ESP approval).
(FSP) Persists. Applicant: `Acknowledged, plans will be provided to the county for review.'
(Rev. 1) Persists. Applicant: `Acknowledged, plans will be provided by others, under separate
cover, to the county for review.'
Engineering Review Comments
Page 3 of 4
d. Wherever grade concentrates storm runoff against curb, provide /label CG-6, as opposed to CG-2.
(FSP) Partially addressed. Applicant: `CG-6 is provided (and labeled) where applicable.' As
follow-up: A few locations requiring CG-6 persist, for example: grade concentrates runoff against
curb fronting building 1, and against curb at the Rio Road East north right in -only entrance (C5.3).
(Rev. 1) Addressed. Applicant: `CG06 has been provided and labeled for runoff against curb
fronting building 1 and against curb at the right in -only entrance, as well as other required
locations.'
e. For all parking spaces fronting 2:1 or 3:1 graded slopes, provide /label VDOT guardrail (GR-2).
(FSP) Partially addressed. Applicant: `Guardrail has been added.' Asfollow-up: 13 parking
spaces opposite building 2 face 2:1 slope at wet pond, location merits GR-2. Please provide,
show, label GR-2 (C5.5). (Rev. 1) Addressed. Applicant: `Guardrail (GR-2) has been added in
front of the parking spaces opposite of building 2.'
f Provide drainage at base of proposed fill slope to convey increased volume of sheet flow away
from Rio Road East and to protect existing /future sidewalk at this location from wash, or erosion.
Sheet runoff may not release uncontrolled across this slope without capture /conveyance. (FSP)
Addressed.
12. C5.2
a. Several extraneous TC labels with leader lines appear to float, without pointing to top of curb.
(FSP) Addressed.
b. Provide label to identify heavy line -type rectangles that may be garage or storage units, these
features front 3:1 SWM facility slope. (FSP) Addressed.
13. C5.3
a. Note railing requirements, VDOT Road Design Manual Appendix All), pg. A(1)-76 for sidewalks
when separation from the back edge of a sidewalk to the top of a 2:1 slope (or drop-off > 4 ft.) is
< 5-ft., as is the case with several proposed sidewalks adjacent to SWM facilities. Provide
required railing, or at least 5' separation. (FSP) NA. Note: SWM facilities have been removed
with this submission.
b. Inlets 602 and 504 appear to collect runoff from Rio Road East. Provide public drainage easement
beyond public RW to downstream SWM treatment or detention facilities. (FSP) Addressed.
c. Provide public SWM easement for proposed SWM facilities. (FSP) Addressed.
d. Provide public drainage easements for SWM facility outfalls. (FSP) Addressed.
14. C5.4
a. It appears the large SWM facility does not have an emergency spillway. SWM facility design will
be evaluated with WP0202200011, including presence or absence of emergency spillway. Special
design criteria apply to emergency spillways on fill slopes. (FSP) NA. SWM design evaluated
with WP0202200011.
15. C5.5
a. Provide note to contractor to coordinate grading with Rio Commons contractor /developer.
Coordination is required to avoid misalignment (or dispute), especially given Rio Commons
reliance on retaining walls in vicinity of travelway proposed to connect the two developments.
(FSP) Addressed.
b. Label large SWM facility, which appears to be a wet pond. If this facility has a permanent pool,
provide fixed barrier landscaping or fencing to prevent trespass, and provide signs that warn of
drowning hazard. (FSP) Addressed.
16. C8.0-C8.2
a. Recommend 95% compaction note/label, leader lines for storm MH str. or pipes substantially or
entirely in fill. Pipes 215, 241, 243, 245, and 221, for example. Also, MH structures 242,244 214,
216, 208, 206, 222. (FSP) Addressed.
b. Provide note Aabel and leader line requiring %:" steel plate floors for "step down" manholes where
difference between invert of inlet pipe and invert of outlet pipe is 4' or greater. Ref. VDOT
Drainage Manual, 9.4.8.7, Max. Grades. (FSP) Persists. Applicant: `SL-1 is specified on profiles.'
As follow-up: Certain `step down' structures with difference between INV IN — INV OUT >4-11.
require %:" steel plate in the bottom of the manhole, for example, Str. 224. (Rev. 1) Persists.
Engineering Review Comments
Page 4 of 4
Applicant: `Additional labels have been added to structures where %:" steel plats is required.
Label has been added to "step down" manholes required by the VDOT Drainage Manual.' As
follow-up: %:" steel plate and SL-1 differ. Please include profile labels that call for %:" steel plate,
specifically, wherever INV IN - INV OUT>4-11. Ref image right, below, request labels at blue
circles, and wherever INV IN — INV OUT >4-ft.:
SAFETY SIAHS (SL-1( ME SPECIFIED
FOR STRUCTURES TELLER THAN
12FEET
17. C8.3
a. Increase pipe slope, pipe #501, to 0.5% Min. (FSP) Withdrawn. Applicant: `Pipe has been
removed with removal of biofilter.'
b. Decrease pipe slope, pipe 4223, to 16% Max. (FSP) Addressed.
c. Storm structure table reference to ht. is confusing in places, for example: 426.08', Sir. 4200. This
height does not appear to be an elevation reference. Please check /revise structure heights for the
four (4) structures listed with height >400'. (FSP) Addressed.
Please feel free to call if any questions: 434.296-5832 -x3069
Thank you
J. Anderson
SDP202200031 Rio Point FSP 120122 revl.docx