HomeMy WebLinkAboutSP201200028 Review Comments Special Use Permit 2012-11-216,01A
COUNTY OF ALBEMARLE
Department of Community Development
401 McIntire Road
Charlottesville, Virginia 22902
21 November 2012
Mr. Scott Clark
Senior Planner
Re: Engineering comments for Special Use Permit SP201200028 — Stoner
The application for SP2012 -00028 has been reviewed and the following comments are noted by the
Engineering Division, Community Development Department:
1) Applicant proposed to subdivide a 6th parcel to be served by existing Chestnut Oak Lane. The
road design standard requirements for a private road to serve a 6th parcel move from 14- 412.A.2a
(county ordinance standards) to 14- 412.A.3a (Virginia Department of Transportation VDOT)
standards). Applicable substandard road characteristics for existing Chestnut Oak Lane include:
• Road width: 18' standard (road width measures 15' per 11/20/2012 site visit)
• Maximum grade: 13 %* (road grade measures 13.4% per 11/20/2012 site visit)
*there is a note in the 2011 AASHTO Green Book referenced by VDOT standards for maximum grade
which indicates grades on low- volume urban collectors may be up to 2% steeper than maximum
indicated (which is 13% for a road with design speed of 25 mph in mountainous terrain)
Due to existing functionality of Chestnut Oak Lane since plat signed in 1988, it appears additional
traffic from one additional residential lot could be served with the existing road. Engineering division
has no objection to the proposed application based upon above comment.
2) Due to rutting and poor conditions on Chestnut Oak Lane's pavement, engineering division
recommends the applicant provide the HOA maintenance agreement for this private road with the
submittal. Construction traffic for a house proposed in proposed Tract 1 -B could further deteriorate
this road.
Sincerely,
Michael Koslow, P.E.
Civil Engineer I1
C: \Users\mkoslow \Documents \Current Reviews \SP201200028
Stoner \CDD— EN —MAK SP— Stoner SP201200028.doc
5 P1401a - oo(4�7
ALBEMARLE COUNTY CODE
and fourteen (14) feet in height. The subdivider shall demonstrate to the satisfaction of the county engineer
that the street will meet the requirements of this subsection.
2. Streets serving three to five lots. Each private street serving three (3) to five (5)
lots shall satisfy the following: (i) vertical centerline curvature shall meet a minimum design K value of
five (5) for crest curves and fifteen (15) for sag curves; (ii) sight distances shall not be less than one
hundred (100) feet; (iii) turnarounds shall be provided at the end of each street per American Association of
State Highway and Transportation Officials guidelines; (iv) street easements or right -of -way widths shall
be thirty (30) feet minimum; and (v) the radius for horizontal curvature shall be forty (40) feet or greater,
unless otherwise authorized by this chapter. Any standard in this paragraph (2) may be reduced to the
standard for streets serving two (2) lots where a driveway departs from the street and two lots remain to be
served, and a turnaround is provided.. In addition, the following shall also apply:
(a) Private streets in the rural areas. For such private streets in the rural
areas: (i) travelway widths shall be fourteen (14) feet minimum, with three (3) feet minimum shoulder
widths, and a minimum of four (4) feet from the edge of the shoulder to the ditch centerline; (ii) the grade
shall not exceed sixteen (16) percent calculated over a distance fifty (50) feet; (iii) if the grade of any
portion of the street exceeds seven (7) percent, the entire street shall be surfaced as required by Virginia
Department of Transportation standards; streets having a grade of seven (7) percent or less may have a
gravel surface; and (iv) the street shall have a rectangular zone superjacent to the street that is clear of all
obstructions, including any structures and vegetation, that is at least fourteen (14) feet in width and fourteen
(14) feet in height.
(b) Private streets in the development areas. For such private streets in the
development areas: (i) an urban cross - section street design shall be provided, with a minimum width of
twenty (20) feet measured from the curb faces or such alternative design, including a street easement or
right -of -way width, deemed adequate by the county engineer to be equivalent to or greater than the
applicable standard in the design standards manual, so as to adequately protect the public health, safety or
welfare; additional widths shall be provided for gutters to control drainage at the discretion of the county
engineer; and (ii) the entire street shall be surfaced as required by Virginia Department of Transportation
standards.
3. Streets serving six lots or more. Each private street serving six (6) or more lots
shall satisfy Virginia Department of Transportation standards, provided:
(a) Private streets in the rural areas. For such private streets in the rural
areas, the commission may approve Virginia Department of Transportation standards for mountainous
terrain if the subdivider demonstrates, for a specific, identifiable reason, the general welfare, as opposed to
She proprietary interests of the subdivider, would be better served by the application of th
(b) Private streets in the development areas. For such private streets in the
development areas, the agent may approve Virginia Department of Transportation standards for
mountainous terrain or an alternative standard deemed adequate by the county engineer to be equivalent to
or greater than the applicable standard in the design standards manual, so as to adequately protect the
public health, safety or welfare.
4. Streets serving family subdivisions. Each private street authorized to serve a
family subdivision under section 14- 232(B)(1) shall satisfy the following: (i) easement or right -of -way
widths shall be ten (10) feet minimum; and (ii) the surveyor shall include the following wording on the
plat: "The existing and/or proposed right -of -way is of adequate width and horizontal and vertical alignment
to accommodate a travelway passable by ordinary passenger vehicles in all but temporary extreme weather
conditions, together with area adequate for maintenance of the travelway, as required by section 14 -412 of
the Albemarle County Code."
B. Private streets serving non - residential, non - agricultural, attached residential, multi -unit
residential and combined residential and non - residential uses. Each private street authorized to serve non-
I4 -53
Supp. #22, 1 -10
r
m
a �-
s a-
V�
kk-Ilao(a
Spao12 -Owa8
(V
ti
R IJ
■
JLL �
0
a
E
T C
m o
O
V)
a? C L
FU�m
E
N
C
w
Q
a) CD °
�O°�
°
L N
CN
M
N
N
Q
+O•, N
�
L
N ^
O
O
�c
3
>
0
Z= U)
O
�f N
3
d
m
0
C)
d
M
N°
7
_
S
°�6 S
Y F w^
�OD�
r
m
m
O
pQ-
ai
!A O E
QmU)
N
M
E
F
Ow
•y0 >O
O
N
Z
11
7 w
O
M
m m
r
0 o QEE
w
m
°'
N
v�
Em
vo 3
w
D�
o
o1
Lm
_
>
z Lu
`�
`�
Lo
L
M
N _
Z
3L
w
o p
3 t
t10
YOUn
....
N
M
.J
n
•c
'v �
>
L y
3 w
y 3
Q
O
U to N
to o
D
Q
IL
a O T
° i
ON 7 Gy.
O
c
N
E
J
_
� E
_
Z
n
U
_
m m m
m
N .0..
o
U O
a, c
> m
S
CO
7@ d
E N
Z
z
O
Q ~
co y W)
ME
U CO
w
E
00
`°
i
C CL
..
N
6
>
°
E
.E C
Q
N
N
N
N
m
w
��
�
Z
N M
O N M
a t0
> m m
U
m
7 N O
e
Z N
O
O
LU
O
in
O "�
a d O.
O n n O_
N
°O
0
•O
w
U
H U �'.'
Z W
N
Cl)
C>
m 7 L
6 U
O L L L
N U U U
=
C N
N w U
C T
Y m
Z
Q
U
00 U
Qo
�D Y
U
Y Y
O Y Y Y
3 O N
m
Vi
H
v O
O a O
m m
O O O
m m m
O
o)
N L
LL
O
Z_
N O o°p
LF'
p°p
C
a
C C C
T m o
Z 3
=
Z
C
O N
C-0
N y d
w N N N
M
> N O
C "00
Z
a
N
UN O
O m O
° 0 0 0
o
E p�
�L
J U
—
c> (n
Q
N
Q
c cn m m
N
m
C
a C
-
>i
°o m
Q _
C Q
Q E
U y
V LL
N m r
�.
m <• r r
O
N
C
O
=
<
W
w
` N O
—`'o N
O m O.
N 0) N
O O ,0.
U N N 'N.
-0
Q
N N
J .0 N
O N
LL r
9 U
C7
O
O
o
c
Z
Z
r N
M
)O (O 1� W
O
0 NC
Q E
7
C
m 0)
N
N
N N O C
N L m
m
c N
O)m
N N
J E
W>
Z
2
a)
L)
c~ n
T N
N c
g T
N C
Z) LU
Z
Z
C-0
C
.L. 0p N
E N
w-:E
O
Q
O w
m C
'OD N V N
N C
n> L E
N
p
m N
�_ w
�O� o)
Qm
N
o o °?
n
Lij
4; 0
U
O
p I l] Qj
-
o
N
cw
2
>
j
w
o
a�Q c
>
m-
U
�?tn
�
U N
Ln
yQN �
:
U
�.N .. m .N ..
U(p NE
LU
Z I-
O
N
Cl) M
M
Nr
>, —
m
O 70
— Y w
m
L U
>., a
Z�v
w
U
>
L "O m
m
N
y
O
L-
o p
O m V
.O m U
nr
EN
>
.LO.
�r
0 ° m N O
C
O C
C N
.�
C
C O p N
N N m 7
o cn mm
> C J c
E N p '>Om -6
O
m N
-oc
N O.
O) T I�7
ti 'p T C
�cm
w
c
N .0)
M C >
_UEfON
N O O C=
p 0
C N m n
DU' W2
�W
o°
3 magi
1.
�fA w a
a w
N
M
O
E m°
3ai30c
�J °
N Now
Z Q (n
H y
V E
E
p O 7
'0
>.0
T N TL N
N p
N m >'0
> °
O
p
> C E
m
N w 0' m
O_
Z
> G
O 0)
N j C
O U
E
L>
N 47
C m
w m L m
N p
L N O
0) C
N C
ca 3 O m
0) •C
3
N N 'O a
O > C
E-
7 p
L v
G? E I
N U C '0 N
y� cm O '>
d
-0 p)
F
N O O m
O
> d
N O N
U C
C
cc
O_Q O..E
N °
ON
C)
y N
3 cD N O
C O 3 2
C N
0) C N
' a
J �
O
y w
m mm aNi o
'y cm N°
E o
a):5 CL
O a
O a
d
a) w^
•30 >_ E N
'0 E �
L 0.
� C - N
a
=
O
N
m
N N U 7
`O >>
C p c
N O) C7 0) N
E a
C C N O O
m N C
O O N m L O m
Z LL •. H"f LL 3
O N N N co m C m
J 'p "O N N Q N "0 N
kk-Ilao(a
Spao12 -Owa8
(V
ti
R IJ
■
Design Traffic VOIUML's
7 7
RAW lolunlev arc a Wkz !Achy 1" 0
77. W.'2z
cKlecPir wirecr, YL r
he
Wlign of an e
t NO 'Idesion, R USUP3
majo a: the w7w N
sircet unlc�" J
c9unmed Aw
Level of SeNce
Whan col leclor,, *,Iwulc jeywred So L ZI 1 :0
ofnietropolitan areas or v,
71
further information. see 5 071
Alignment
Alynmem in residenti.i! 1; :he
fills to �app ca.,,.
Grades
Grades Or ur an collector sEree:s Sh'ouid e as W el an 7rjvta.:.
A mininium grad -ni :s accerta 'ti e -c
grade of (15 percent or morc be use, "here prac%w::, 7 7
are PRNew. a maximum grade of 5 percenr is reccnAnNECCA
Glut r add i I ion a 1 info tr r - 77
PreN-Sed belok the surrounding terrain to direct dran-I 2 g e T
it can reach the storm drain S% swry Appkabie Lradierzs. :7
turns are addre-s-se in Section -3,4- on 'Wirrical Tignmerw,- Nldx:7-
ShOuld be Js n in Table
Table 6-8. Maximum Grades for Urban Collectors
Maximum Grade N kw Spedhed Nlaximurn Grade for Spec:r-ied
Type of Design Speed (WIT) '-- Design Speed 'IMP&
------ Terrain -------- 30 40 50 60 70 80 go 100 20 25 30 35 4n a:; ;n
Level
12
Mountainous ia 13 :2
NOW Short tength
, 5 Of grade in urbar; area!, such as grade
_grades, an( frad
T —r Tkc—'sn' —'C'
-�C""ur,�eJrb3n ccllectcrs
6
7
14 j 12 12 :1
SS li2n 150 rn - '
"my be up to Z% steep,_.