HomeMy WebLinkAboutSDP000000023 Study 1977-11-15 •
N OF ALeEMq
00 .,OF AGe� ���a.7r
®��RGiN�PD
Office of County Engineer
414 EAST MARKET STREET
CHARLOTTESVILLE, VIRGINIA 22901
J. HARVEY BAILEY J.ASHLEY WILLIAMS
COUNTY ENGINEER ASSISTANT COUNTY ENGINEER
MEMORANDUM MARK F. OSBORNE
ASSISTANT COUNTY ENGINEER
DATE: November 15 , 1977
TO: Mary Joy Scala
FROM: J . Harvey Baile
SUBJECT: Review of Site Plan Application - Rivanna
Water and Sewer Authority - A.W.T . Plant
Since writing my report on the A.W.T . Plant site, another
alternative has been suggested by Mr. George Williams . He pro-
poses a channel change adjacent to the Emergency Holding Ponds
which would widen the existing channel sufficient to compensate
for the reduction which the holding ponds would require .
A cursory examination of the drawings and cross-section
indicates that such a channel widening is feasible from an
engineering standpoint . Easements would have to be secured and
a permit from the U. S. Corps of Engineers . However , this option
appears to have much merit and should be allowed further study.
JHB:bd
cc : J. Benjamin Dick
George Williams
N ��
.c/ OF AL9
GO� F AL7 �
J r
U h7
`�RGICI�P�
Office of County Engineer
414 EAST MARKET STREET
CHARLOTTESVILLE, VIRGINIA 22901
J. HARVEY BAILEY J. ASHLEY WILLIAMS
COUNTY ENGINEER ASSISTANT COUNTY ENGINEER
MEMORANDUM
MARK F.OSBORNE
ASSISTANT COUNTY ENGINEER
DATE: November 14, 1977
TO: Mary Joy Scala
FROM: J. Harvey Bailey,/An
SUBJECT: Review of Site Plan Application - Rivanna
Water and Sewer Authority - A.W.T . Plant
Attached hereto are my comments on the captioned subject . George
Williams talked with Mr. Krebs , the consultant , today. He says
the final clarifiers can be relocated. This leaves the holding
ponds as the only real obstruction to the floodway. There is no
way to relocate these on the site and have them function. I re-
commend approval.
cc : George Williams
ADVANCED WASTh WATER TREATMENT PLAN
Site Plan
The County Engineer has received a request from the County Planner and County
Zoning Administrator to review the plans which have been submitted by the Rivanna
Water and Sewer Authority, for the purpose of determining his opinion on the following
matters:
1. Are any structures of the ANT plant located within the floodway of Moores Creek?
2. Is a Landfill permit required?
A special permit for an ANT plant at this site was granted the Rivanna Water and
Sewer Authority by the County in 1974. ,This approval required that all structures
should be located at or above ground elevation 330, as shown on a drawing prepared
by Paul B. Krebs and Associates, Consulting Engineers, entitled "Existing Moores
Cree W.W.T.P. Site and Property South of Moores Creek." The design of the facility
has now been completed, reviewed and approved by the regulatory agencies, state and
federal and the Rivanna Authority has made application to the County for approval of
the site plan. A drawing entitled "Moores Creek A.W.T. Plant Overall Layout Appendix,"
prepared by Paul B. Krebs and Associates, Consulting Engineers, was submitted with
the application. This plan shows that during design, the number and size of units
which make up the facility were greatly expanded so that the design plan shows
several structures located on ground elevations which are below the 330 elevation cited
in the special permit of 1974. This will require an amendment to the permit.
Because certain structures are located below the 330 elevation, it becomes necessary
to determine whether or not any are within the floodway. The Zoning Ordinance defines
the floodway of any flood plain as, "the area needed to transmit and discharge the
flood water or flood flows of any river or stream." The general flood zone for Moores
Creek has been established by the U. S. Corps of Engineers. The division of the flood
plain into flood fringe and flood way is to be determined by engineering principals and
is site-particular.
-2-
The County Engineer requested the Rivanna Water and Sewer Authority to prepare
a study to show the effect the A.W.T. plant will have on the flooding of Moores
Creek and to ascertain the properties that would be thereby effected. This study
has been delivered to this office and has been reviewed by the Engineer. A copy of
the Rivanna Water and Sewer Authority report was given the Planning Department.
The report states that the gas storage sphere and chlorine storage building can be
relocated to an elevation above 330. Also since the report was delivered, the Rivanna
Authority has been assured by its consultant, Mr. Paul B. Krebs, that the future
final clarifies can be removed from the flood plain. There remains the pump stations
and the holding ponds that cannot be relocated.
Pump stations must be located at the end of the interceptors they are designed
to serve. In this instance one pump station is located at the end of the Moores
Creek Interceptor, and the other at the outfall line from the Moores Creek Plant,
both of which are now in use. This second station makes possible the use of the
existing Moores Creek Plant as a part of the future A.W.T. plant. The holding ponds
are a requirement of the State Health Departiiient. Their purpose is to prevent the
discharge of raw sewage into the receiving stream in the event of a power failure
or some other untoward happening. This requires that they be placed at an elevation
that allows flows by gravity from the treatment plant. The holding ponds are the
major factors to be considered in assessing flood conditions that are altered.
Certain structures which are water related are now permitted within the floodway,
under the provisions of the Flood Plain Ordinance. At its meeting on November 9, the
Board of Supervisors passed a resolution of intent to include pump stations and
holding ponds in the category of structures that are permitted in the floodway. If
and when this amendment is adopted, the Rivanna Authority will be free to act.
Rivanna Water and Sewer Authority calculations indicate that the presence of
the holding pond in the flood plain will cause the predicted intenuediate flood
elevation to rise 3.68 feet immediately upstream and the corresponding backwater curve
will extend approximately 2680 feet upstream. The results of this backwater were
-3-
plotted on the planographic map of the City of Charlottesville to show the areas
and buildings effected. Fran this map study, it appears that an many as nine
buildings would experience some degree of flooding that would not occur in the
absence of the holding ponds. The Rivanna Water and Sewer Authority should acquire
flooding easements from the parties effected in order to compensate the landholder
for the additional risk of flooding to which they may be subjected.
It is my opinion that:
1. Some of the A.W.T. structures are located within the floodway of Moores Creek.
However, they are located as they are in order to fulfill their function respective
to the operation of the A.W.T. plant. They should be permitted.
2. A landfill permit is required, particularly for the dikes which foLui the holding
ponds. This can be reviewed when application for a building permit is made.
3. The Rivanna Water and Sewer Authority should be required to obtain flood ease-
ments over those properties that are subject to additional flooding by reason of
the construction of the stilling basins, that is, over the area lying between the
intermediate flood line, as predicted by the U. S. Corps of Engineers and the
intermediate flood line above the stilling basins, as calculated by the Rivanna Water
and Sewer Authority.
4. The gas storage sphere, chlorine storage building and final clarifiers shall be
located above the 330 elevation, as required in the approved special permit. All
other structures shall be allowed to remain in their respective locations, as shown
on the plan which accompanies the Rivanna Water and Sewer Authority's site plan
application.
•
�P 9G
RIVANNA WATER & SEWER AUTHORITY
P. O. BOX 18 • CHARLOTTESVILLE. VIRGINIA 22902 • (804) 977-2970
ry ,(P
1 OTTESv1\F
November 10, 1977
Mr. Harvey Bailey
County Engineering Department
Albemarle County
414 E. Market St.
Charlottesville, Va. 22902
Re: SP-373 Amendment, AWT Plant. Site Plan approval
Dear Mr . Bailey:
At this time the Rivanna Water & Sewer Authority has an application
for amendment to SP-373 before the Albemarle Co. Planning Commission,
also accompanying this is application for site plan approval for the
AWT Plant.
The purpose of this letter is to (1) comment on possible effects
due to filling in the Moores Creek flood plain for proposed treat-
ment units ; (2) comment on the location of the miscellaneous
structures also located in the flood plain. Article 9-A, Flood Plain
Districts , of the Zoning Ordinances , in paragraph 9-A- 5 and 9-A- 5-6
calls for studies to be submitted to the County Engineer for his
approval .
I . Emergency Holding Ponds :
The original site plan as submitted with SP-373 showed no
emergency holding ponds . In the interim between the filing
of SP- 373 and the review by the Va . State Health Dept. , of
the final plans of the AWT Plant, Va . State wastewater treat-
ment plant regulations were amended so that emergency hold-
ing ponds became a required treatment facility. Due to space
restrictions at the proposed treatment plant site, the ponds
were designed to be located below elev. 330 .
The construction of these holding ponds could possibly cause
damage upstream to certain property owners as the flood plain
would be constricted at the ponds . To determine the full
extent of any possible damage calculations were done to find
the changed backwater profile, new backwaters have been plotted
on topographical maps and a preliminary reconaisance of the
affected area was made . (The topographic maps and calculations
are also delivered with this letter) .
November 10, 1977 Page 2
II . Miscellaneous Structures in Flood Plain:
1 . Influent Pump Sta. : This pump station location was deter-
mined by the existing influent sewer connection to the
original plant. The pump station operating floor elevation
will be above 331 . 00 (there will be no openings below
331. 00) . Therefore, the station will be immune to damage
from the 100 yr. frequency flood.
2 . Gas Storage Sphere :
This above ground tank holds methane gas from the digesters .
The consultant will move the sphere to an elevation above
331 . 00, thus out of the 100 yr. flood plain.
3 . Effluent Pumping Sta. :
This pump station pumps' "grey water" to the plants non-
potable water system and its location was determined from
the existing plant outfall line which will be utilized in
the new treatment plant. The consultant has designed this
station so that all openings are above the 100 yr . flood
elev.
4. Cl2 Storage Building:
This structure originally located below elev. 331 . 00 will be
moved to a location above the 100 yr. flood plain.
5 . Future Final Clarifer #4 :
In discussing the location of this unit with the consultant
it is apparent that this location is the only one suitable
because of the piping arrangement around the originally
planned clarifiers and because of the space limitations of
the site. The structure would be situated so that its
top walls will be above 331. 00 . Attached to this letter
is a stream cross-section which shows the flood plain before
and after the building of the proposed clarifer.
Summary: It is the Authority' s opinion that the increase in elevation
of flood waters caused by the construction of the proposed emergency
holding ponds is minimal.
The treatment plant structures which are below the 100 year flood
plain elev. are protected from the flood and their locations were
dictated by existing conditions . (except the future final clarifer
#4) .
November 10, 1977 Page 3
Please find enclosed the AWT Plant Site Plan on a 1" = 50 ' scale. This
map is also to be used by the Planning Dept., and for presentation to
the Planning Commission on November 22, 1977 .
Thank you for your cooperation in this matter, please call if you have
any questions.
Sinc9rely,
� �
Mi hael McGovern
Sanitary Engineer
MM/rc
Enclosures
, ; 4
, .
• i f .
•
I! I
_ PI Iv ro to Iv
.... N f4) ._.
• CI V CI (0 C).. N) (1' L rr 01-.. ,J 0 .... lq (x)
1
' 1 [ ' ' ' I J. 4. ITT; • ; 4 1 , 1 k----77 iT-TTF r . -7 i ; 1. r-TT-7-
' I 14 1 i , T -t tr3 ' It ' ' , * . i , ' . . . , • - . --1- 11i , ; , . t 1 ) 1 . 1-{ _t I •t_
. : ( ' ''.. ,..:17....i Y-4 CV/2 QZ2C77—/
‘• 4 1 I i 1 ! ' Ht-tt . ' . ' ' i i Itt , , ... . 1 t
II, L11 l ' 1 , / I , „ . , ' t I , , _ , , i"1 . 1-
' I
! _ , - 1_ , II . i : ii , , , . , , , - : 1-----1• ,-- , . . , T , , . ;
, ' ! .' l''''."I 4 I t i '1'1-1- .--,..t-• I 1 ' • e 7 1 4 ,
......, .......•• ...... I 1 ; f ' r ' "1
, 1 , 11_
1" . . " ' ' i1 ' ' ! ' ' ' 1 • • ' r ' ' : 1r 1 ' • ' ' ' ' Ii41 ; TT ' iT47 ; 1 41 • 4 11 , 1-, ,"ii-417114' "I , l' ; T ,-i j T IT i',t,
! :--t • j - • • . , , 1 . . i . , ., ; . . ; . } f 4-i.- f -T t l• , T i •• L il-I • ; : , - , , • ; 7 ' •—.."1—{ ,1-I"--1-1-r 1-.1 : '4'`f"Y- -r- 4 ,-
. • --1-;r t-'--t-r ','i'-'----1----'-'7 , 71 1 :
• , . . , I •
. 4 . , . . I . . . 1 - • , • , { , 1 1 r j ' , 4 ; I ' E, - • , ; , 1 r ; . i ' j ; ; I , ' -,4 , t-i 4-.-,. , A •f--1. T T , i 4-1- -1.-- t- - t-- ,
t - I , , I I . , , .1 + t . . , . • t 4-4 4 t.4 . t. , ..
I
: . t . ' , . ' ' ' ' • ' , ' I . ii i ! I ! , . i171_, .., ,I , r ;, , , 1
0(2; ' .o rfr ,; oc;) - . . .ox ---' , : ol . , o ,.- ...; vo 1- ooi -oc2i:
_ t_.
„. _.,_, . /,,./ /i,, : , _.j , I , , .
..........,...„_ , ;
. . , , , • . .•__,• , , ,--_,
,. .., . . . , , , • . . _ , . 1 , . , . . , .1 f 1,i : . .,• ,t .. ' ! , • . ., .1i
i - -----• 4 . ,-- 4--4-4 i • ; I—4- ' 4---T-r--1-1-•,-
, , , - • , 1 , • - , 1 1 • • , , ! , - • , - - • , ' • • :- • .
L'i ' •-•-t -•.- 1 ,•-•1•-•,-.-,- ' ' 1 i .1). ' . : ' .1-.1".ILri-4,'"I
. 4s.),. , . ' i . . . , ' • , , -±-1 I •-1- -1 I__1; 1 I r
f-t
1 , , , ,it , . . ; . • . 1 . - ty ;- ' ,-111-r"- ,1 " ' 1--, , •1 ...1, . , . . 1 ; . ; . • i - ; , . ; ' 1_ 1• ' fl ' ; ' ' - ' ' ' ' , • -
' - F , ' ' ' . ' • ' ' ' , ; I . , , ; ,-I I t-' 4 i I i
,.... , L :4- 1.7 .p f -- 1- , , •,. ' .
, • 1. 1'/7,'!,2? 717111/9/cYe21 . '
. ,
. . . ,
. .
. , . . .
. • ,
\....... ..,.%)...i..,\.-
,, *. I ., ,••.,'..? /4,:. ' . ' • ' I-- ' I
1,..-......iii;!................-.--•
C...•3 -• ' \\,.' 1 1
- _ , ' % • I
(2 2(.; '. 1 1- *,'I. .. : '-'' ' '- '• :- : . '1"
1 .
1 • ,
\,,'-• ' . . . .
' .
. .. ,
' 7 •
' .
I 1 •-•• ..... , •
0' ...........-....-........- ,,,,... .......1.,,11:1,.." .......... .......t. ........ ......... ........ ....4.... ............ ,AV LMII•••••/ 4ION.I4 ...ameame ......y. arra.. ......... Aram.. era...raw .......... .ra...... & ,E ... ,
• \ ' :
. ,
414 / ''47..::',' 't.:.--• ' `---!, , 'I ..
.--
_. --, • ,-- .--,7
A , • , . , . . , . , . : i
, T
. ..
ll 73 I' r3 Ci3 CC)4°a ei .
. . .
. .. ,,.,
.-T-'4.-- - • '
, ; , • , , ;
, • .
• ,
. .1 , " r r •
, • . ; . , , ' '
. ,
. .
. ,
F. •
._., _LI. 0/ 6( I i ---: ' r•3N..' i '.:'''7 -—.4,1 ..,....r4.1...-ri V-11 ICI
k ....1 Li (...... 4.../ • , ' • . , ,
....,
L" 4- 0 V t7(17 i ' ‘'TS n.-,id ,-7-7D 0-19-i 17-----Av
i . •
••„... . ._.., . ., .., 4 . ....' , . .
, it. . I •
.1 1
, j . . . , .:, ' ' ._ i /47..,,,y... .9trivir"'1",_91/1,>IC)07._
L.,.
/ 4
--. -. I-ILI r: . , 1 ' : : ; • i rt 1-i : , • : • ; . , • • ; • ,,• ,. , : , • , ; , ...0
I 4 . - . • • • 1 4 . 1 . •• . 44 . ; ; T4 4 , . , 4 i -. = • , • . , . .. , , - . , , . , , . ' „ ' ; : • 1
4 , . 4 . 4 . 4 , • • 1 • ' I 1 , , , .
- I • • , • , I 1 ;.
. . j 1. 0 0
,
----••-•-,-- •••"^-11 ., „ ...._..... ,.........___. .. I, ,,,-., ,... „. .. , .., ....,..„,.. -...4#-,...77.-'1W- 4`•175"'-"•'..."-'.-"..
•,"••••-•-,---•-• "-
1'
,
....... .....______ _______•__, __ __. . . . . 1.......,
,
,
6T.6,. 344-OGI . r ' • '
......., ,... "- J .:.
. ' .(16'4, gErc2A..26 r/izi4& ,--- ,ii:=--i-,--/-
4 e g 4 A ri(-*e ic/z z 1/4•1 6-=
LooKiil& DOWV57-ze4M
•
. , . .
parae
A
..„ .
H, . %. 4 ;, 44i , ; Pri ' 1 • CL4 el , .Zf i'd4v
4 li • l 'il ! ' ' '' ' ' ' ; ; l ' ' ' , ; ; ' i /P-,e4 P r
._.
i i ; : ,HrJi , „ : ; 1 , 1 • , , il ! , ; , i , r ; • . ; : , ; , ; ; Jr , : i .r ; . / 'c _ , . ,
, . r
4•,P'
4-1'i.-.t..•!4„'.,-....'I4'-•.:,i-1i;it;.1I,'.
-4•-,;4,.,4J!';.i 4.i4,;•;,i.,.:.1,'•;:-i•l•.I1kI;tt1.,,14'.r r•1•,'.14.•.'f-.4,4•t.-.':--t•'4•;.'4;-'•f14,i:!'M'I••1'+•L"•
;-i'.;!'•1"iP:•' i1;•;'
, i,1 t.•' 4l,'..Li,,+.%.:'--`;.'.4P: -:l. "•';":i,4,_
, 11 ;•1..1..
. • •.
• 1• {:, i; 3i•• )5•.. .1• D
% , .........
14 4 1 i ..t.Ij..t
I
i
„. ..
7
33.
. . .' •
.i
.,--
..„
/
f i +
....., • . , , • • .„ ,..4 :. , . ,
, . . . , ,., , • : • +.4_,„..... , • , , . , : . , , . . • c .;,..._............ _ __ ..._____ ..i.. ......:_....,•. . / • . .-..-..
.H, : .. : 1. H i 4_, . , . ,., . . , ; ., , ' . ; • i . • , ,\•,'4‘ -./..,.,—, ,--,— -----
f--t-1 ! ' ,-4-1, 1 ‘---1 --• , , i , f, : : ' • - r ' • r ‘./ . . ,
. . : , : . . , • • — . ' . • it
, iiii „Irv: i
4_, ,.J. i y.4-4 ...-I..4--1_; , . .: , 4 : ! ; . : • i i /k171 .
-1.--;-• . i '4 i .1.-...1'.'f--; . ' • . L.: .-; .. ; i
. . •q'.
/ 20
_,_i__„4 , .4_,_..__, 1 4,--ft . . .- • ‘ • • ' . ' 1 ' /1‘ . ' . • .
- . IT . 3
"1'1'11 '11 t 4 i--4 f--•+-i--1 • , , 1 , • i• ‘ „---. ,
i t.., . , • , . ! i .
.
4-- 114- - • ti -1- , , • 1 ! ; •4.-i 1 ,, r!'t '. :t, ; ; ' , 1 ; ; , ' , '-71.
. /
- 1 •;-1 f- --t
,.,., , - fh ' , I ' ll rt- ' , • '. •
1 , rr— „ „I 71 . w ,1- , ; : .- . C‘ , , '
. : 4: ' ' ' ' . , . . • '' — ' , ••-•
: .
- ifit . ' t e t ' ' ' ! i"• le'-t + .4-}, 1 4 ; .
111'4-- -§ 41 ''.1 ' '11 * ; i1,- fIL : . 1: 11 . . : , '' ' . , , . 4 . . t . . , . 411 , .r"{ j 14---- — . - :
1 ' IT : : 1 , 11t , -1-r* 1 ' ' ' ,
" • ; '- I
..„' LJ- f _.i. ----. :.----', ---, ; i.1- 4-
I
am
_ . Li_i , -4,-1____L, 4,. LI si
t , I IIII
I I i. 1 .-1_.- 1 . ;Tr i ' . I ' 1 14 4 -4 if f •_ _____;__i_it .1-..-.....„_ . .. _
--- I - •t, 1 • t . , I
i I -t—ti I L 11 4: ----r-
__ i ' •
i t ' i --1-i te. , ' i-1 ; 4 ; i
-4 1 1 i
III . 11111111 I t h ii 44 1 I , ;
i • . ! , •• i / -1-1---'---'- = 1•-•-• 1---II: --- 4 ; 4 . : .- ....-
,
•i 1
I I 011111 i 4 1 .41 ._ 1 '-' -'•-'-•L-Ft.-• 1 '
• • 1-1-I- ; "; 1.." ; i ' ' • ak.
114..
' kJ.; ' ' i- -1 1 I-1 i ' ' ' ; "---• '•mi. - ...... „ ,
r 1
J , • •
.
. 11 _ In: , 4+f/0Hr_ -1. :-X10 ! ' '. 4.0.9 'r 1 ' /0.0 , : '1‘..,1") , Fi
_ . tt_
' -4 i.. i.1. • . • , 7
I „;:.. .1. _,_4_1441 . r.„, -1, , ‘
'
11 4+-- - -- 1-111111-4-14I1 1 .1 i ' -, 1 . ' '. :. 4 11 lit - II ILI 1111- -lifilllillt-1, 1. 1.1. 11 fr4 t i , ,. , .• _ i
,i f • I I 1-1 I . 1
4 ' ' 1-' • • l ' • • -• + ' .. • I ' ' 1 ! 1 '. i." :. . •
H
.L.11_.;Li-2:1i 4 :...4 111Lti ' '...L_: I .i_L_'-...• '
-r---+--
t. 1 4 I -4 -r- --t-f-4-.4-1 • t ; 14 ,; t! i I.'e:t 4 i 4-i 1 : ,. , 1,-- 1 t ' ' i t •i i IT', :' ' 4 .
#'14' il 'if ! " ifl t ' ll ' ' if ! ! ' l 'i-' '' ; ' ' ' 1 ^ . 1 . ' ' 111 ' i ' i• Hi . fti • ; • ' • . „ ;
-,4_.i 1 - " " ; 1 ' i • ' i ., 4 4 ' l ' 4 , 4 14 .44 ' 14 , 4 : : . 1
I.-1 4.• I i I. j;- 4 t t t ; t . ; I t , , . ; . , ' . ; , . I . . . , . , . , , , . t 1 : ; : ! 4 „ .
4 '.......4.1... . , i-..-4--4-4.t .t .t ; r , t . ; " ' t••• • . ' lit , . . ii ` I ! , li , 4 , ; ifiti ' , . 11 • ., _
.-14-1—. '•1'!---i , t-1-1—t" -4----1---; '4---; — '-Li----t 1-'.-1-4---1 --1 ,-4 ,-.4 1 -'- 4-T- - , ----t. t i --14-'---• .-;,- —— iii7-6,e/v/E-Dm7-e Re6/o,17/‘..
. i .. , cf , li i--t . i-, t . • . 1 it , i ,, ,, , I. , 44 I , ' ' ' I ' , 4 4 ' • ! • 1 I ,' 1 I . ; '
. .
,
hli-ffil ,-,, - itti ,411111 , • i. tilt- `14 . 110 II'"? : i / 3 I i 1. II i [ il 1 ti • ' ..610,tr. W
04 v e) cv No im co N to in %r m cv - 0 a) co r, '..,;: 6-, ': • :.;
C,1 01 01 ••• " ^ ... ''' ^ " '''' ....
'Ns '
•••,..
...Q.
o �/• - - I UC.K.0 l— i
OFALt3
Nri
A r
GOy6F A/.gam
O
�RpIN� k
Office of County Engineer
414 EAST MARKET STREET
CHARLOTTESVILLE,VIRGINIA 22901
J. HARVEY BAILEY ` J.ASHLEY WILLIAMS
COUNTY ENGINEER �v�\�� ASSISTANT COUNTY ENGINEER
MARK F. OSBORNE
November 1, 1977 ‘4,4 , Cea ASSISTANT COUNTY ENGINEER
George St . John
County Attorney
416 Park Street
Charlottesville, Virginia 22901
Re: Article 9A: Flood Plain, General , District GP
Zoning Ordinance
Dear Mr. St . John:
Throughout the past several months I have been
discussing the provisions of the Flood Plain Ordinance
with the Zoning Administrator , the Planning staff and
others, in a casual manner. Now, with the appearance
of the Rivanna Water and Sewer Authority before the
Planning Commission for the purpose of obtaining site
plan approval for the long-awaited AWT plant , it is
apparent that the Flood Plain Ordinance does not fully
allow for the needs of such a facility.
The Engineer, in designing a sewage treatment
system, for obvious reasons employs the force of gravity
to the fullest extent practical. This inevitably leads
to the use of a site close to a river or creek. Treat-
ment facilities are set above flood levels but pumps
and other appurtenances frequently are located within
the floodway, and are designed so that the structure is
immune to damage by flooding. The proposed AWT facility
incorporates an existing treatment plant and interceptor
into its design. There is no practical way to relocate
a pumping station outside the floodway. However, the
pump station is not expected to have a measurable effect
on flooding, either to raise its level or increase the
velocity of flow. Similar situations can be expected
for the location of water pumps at some future time .
In order to allow for the desired design features
I suggest that the ordinance be revised to allow the
location of appurtenances of water and wastewater plants
Georg S t . J otln
Arti-c4 9A, Zoning -Ordinance
Nove r -1 , 1977
•
Page two of two
within a floodway, by adding the following item to 9A-4
of the ordinance:
9A-4-4. Pump stations for water or wastewater with
• their power supply and control devices ,
holding ponds and other appurtenances to
water or wastewater systems , or
whatever wording that may be needed in
order to obtain the objective.
Please let me know if you think this inadvisable.
Very truly yours ,
.72
r„) ,,,,/, ‘„ ‘„ _ . _ ,,, „.64 .-<____,
`- J. Harvey Bailey `/
County Engineer
JHB:bd
cc : Guy B. Agnor
Bob 4amin Dick
ert Tucker
V" IN( OF ALBFM,q
of^,
0 � a7r
G!,
Office of County Engineer
414 EAST MARKET STREET
CHARLOTTESVILLE,VIRGINIA 22901
J. HARVEY BAILEY J. ASHLEY WILLIAMS
COUNTY ENGINEER ASSISTANT COUNTY ENGINEER
MEMORANDUM
MARK F.OSBORNE
Planning Depaituibnt ASSISTANT COUNTY ENGINEER
October 18 , 1977
DATE: OCT 1 8 k�cd
Mary Joy Scala
TO:
FROM: J. Ashley Williams
SUBJECT: Site Plan Review - AWT Plant
By letter from Mike McGovern, dated October 13 , 1977 ,
and by specifications for pavement from the contract
documents , I approve the pavement design for this
site plan. I still do not have any information about
the storm drainage system to review.
. r:
29-1
29--00
IMPROVEMENT OF GROUNDS, ROADS
AND WALKS, GRASSING, LANDSCAPING, FENCING
29-00 GENERAL: The Contractor shall construct complete all
roads , parking areas , walks, steps , curb and gutter
sections , and drainage structures as shown on the Drawings
and specified herein; shall furnish and erect fencing
as shown on the Drawings and described herein; and shall
furnish all materials and perform all grading, grassing
and landscape work as specified herein.
The Contractor shall save and prevent from damage
all trees not in locations to be occupied by new work.
The Contractor shall be responsible for main-
tenance of all roads , plant roads , walks , curbs , gutters ,
etc. , both new and existing, during his construction
operations ; and the Contractor shall place all roads ,
walks , curbs , gutters , etc. , both new and those specified
to remain, in final acceptable condition in accordance
with these Specifications .
29-01 ROADS AND PARKING AREAS : All excavation, backfill, fill
and eiiE-ankment work sT all be performed in accordance with
the requirements of these Specifications.
Construction of subgrade , subbase , base , and finished
paving for roads , parking areas , work areas , and service
areas shall be as hereinafter specified. Types of finished
paving for roads , parking areas , work areas , and service
areas shall be as shown on the Plans and/or as specified
herein.
Subvrade for all roads , parking areas , work areas
and service areas shall be prepared in accordance with
VDIIT Specifications Section 305 , using materials in place .
All depressions shall be filled with approved material
compacted to same density as the remainder of the subgrade .
Soft places in the subgrade shall be excavated and
refilled with approved material or reinforced with gravel
or crushed stone so as to achieve the density specified
for compacted fill.
• •
29-2
Subbase for all roads , parking areas , work areas ,
and sere e areas shall be constructed to compacted
thickness of not less than 6" and in accordance with
VDHT Specifications Section 309 . Materials for sub-
base shall be in accordance with VDIIT Specifications
Section 209 .
Base for all roads , parking areas , work areas , and
service areas shall be constructed in accordance with
VDHT Specifications Section 309 . Compacted thickness
of base course shall not be less than 6" ; and materials
for base course shall be in accordance with VDIIT
Specifications Section 210 , Type I .
Bituminous Surface Treatment shall be multiple
course type conforming to VJIT Specifications Section 316 ;
and materials shall be in accordance with VDIIT Specifications
Section 211. Number of courses shall be as indicated on
the Drawings and/or as specified herein.
Bituminous Concrete Pavement shall be constructed in
accordance with the requirements of VDIIT Specifications
Section 320 ; and thickness of pavement shall not be less
than 1 3/4" (approximately 200 pounds per square yard) .
Materials shall be as specified under VDIIT Specifications
Section 212 . Wearing surface shall be non-polishing,
or the Contractor, at his option may use a deslicking
mix for the wearing surface .
Portland Cement Concrete Pavement shall be con-
structed in accordance with VDIIT Specifications Section
321; and materials for concrete pavement shall be as
specified under VDIIT Specifications Section 219 . Thickness
of concrete pavement shall not be less than 6"
Rekaving over Existing Pavement shall be accomplished
by scarifying and crushing existingpavement; shaping ,
rolling, and crowning to suit existing road grade and
existing curb and gutter sections (leaving compacted surface
down within curb and gutter sections so as to accommodate
thickness of finished paving course) ; and constructing
bituminous concrete pavement as specified hereinabove
(minimum thickness l 3/4") . Where new pavement is shown
to deviate from existing pavement or is shown to be wider
than existing pavement, the compacted fill , subgrade , sub-
base and base for new pavement shall be constructed as
specified hereinabove .
/ • • .
29-3
29-02 CONCRETE WALKS : Concrete walks shall generally be 4 '
wide and 4 " thick unless otherwise shown on the Drawings
or specified herein. The walks shall be constructed
of Class A Portland Cement Concrete conforming to these
Specifications .
Expansion joints shall be located as follows :
1 . At points where the walk changes direction .
2 . At points where the walks are against other structure.: .
3. Not farther apart than 90 ' on straight walks .
4 . At the top and bottom of steps .
The expansion joint and filler shall be 3/8" thick
and shall meet the requirements of ASTM D-1751. The edges
of the concrete at expansion joints shall be rounded with
an edging tool .
Contraction joints 1-11/2" deep shall be cut across
the walks with a grooving tool along lines not farther
than 6 ' apart.
Forms shall be made of wood or metal and their
depth shall be equal to the depth of the walks . The forms
shall be set to true line and grade and the forms and sub-
grade shall be inspected and approved by the Engineer
before any concrete is poured. The sub-grade shall be
damp but not wet when the concrete is placed.
As soon as the concrete is placed, it shall be
vibrated or spaded to secure a dense , homogeneous mass ,
and struck off with a straight edge . The surface of the
walks shall then be floated with a wooden float until
the surface is true . Later, after the concrete has taken
its initial set it shall be floated again. At this time
a light sprinkling of fine screened sand and cement mixed
dry in the proportions 1 part of cement to 1-1/2 parts
of sand may be used on the surface . A troweled finish
is not acceptable , but the floated finish must be true
and smooth .
All concrete walks shall be constructed on firm
compacted subgrade and on crushed stone base of compacted
thickness not less than 4" .
29-4
29-03 CONCRETE STEPS : Concrete steps shall be constructed
a's ntegral portions of walk construction. Steps
shall be reinforced monolithic concrete , as detailed.
Concrete for steps shall be Class A in accordance with
these Specifications . Steps shall have abrasive non-
slip finish as specified elsewhere . Safety nosings shall
be provided in accordance with details on the Drawings .
29-04 CURB AND GUTTER: Curb and gutter sections shall be
constructed of Class A concrete to the dimensions shown
on the Drawings and in general conformance with the
requirements of VDHT Specifications Section 502 .
The forms shall be of wood or metal , straight and
free from warp and of sufficient strength , when staked,
to hold the concrete true to line and grade without
springing or distortion, and shall be sufficiently tight
to prevent leakage of mortar. All forms shall be cleaned
and oiled before concrete is placed against them.
Where radial curbing is shown to be constructed , the
forms shall be sufficiently flexible or otherwise designed
to rpovide a smooth uniform curved surface of the required
radius .
The curb and gutter section shall have tooled
contractio►► joints spaced not farther than 30 feet apart;
and shall have 1" preformed bituminous expansion joints
not farther than 90 feet apart . When the curb and gutter
section is constructed adjacent to or on rigid pavements ,
the locations and widths of joints shall coincide with
those in the pavement.
The subgrade for the curb and gutter section shall
be compacted to density as specified for road and parking
areas ; and, to insure the securing of a clean bedding
surface , a base course of crushed stone , not less than
2" compacted thickness , shall be placed to receive the
concrete curb and gutter section. Prior to placing
concrete , the forms and sub-grade shall be checked and
approved by the Engineers . The sub--grade must be moist,
but not wet, when the concrete is placed. Concrete placed
in forms shall be tamped, spaded or vibrated sufficiently
to produce a dense , homogeneous mass and to bring the
mortar to the surface . The spading and vibrating shall
be adequate to prevent honeycombing at the forms .
•
2'9-5
When the forms are filled, the concrete shall be
struck off with a template cut to the gutter surface
design. The concrete shall then be finished smooth
with a wooden float in a manner which will compact the
mass and produce a true , even top surface . Plastering
with mortar to build up or finish the gutter will not
be permitted nor will excessive troweling be permitted.
The forms shall be removed as soon as the concrete
has set sufficiently; but unless otherwise directed,
forms shall not be removed within 24 hours after the
concrete has been placed. Minor defective areas shall
be repaired.
Immediately after the finishing operation is
completed, the concrete shall be covered with burlap, which
shall be kept damp for at least five (5) days or as
directed by the Engineers . After the concrete has
hardened, spaces along the back of the curb shall be
backfilled to the required elevation with approved material.
29-05 DRAINAGE STRUCTURES : Drainage structures shall be
constructed in accordance with details shown on the Drawings .
Structures shall be of Class A concrete , or brick as
indicated on the Drawings .
Cast iron gratings or other castings shall be of type
and design as indicated on the Drawings . Iron castings
shall conform to the Standard Specifications for Gray Iron
Castings , ASTM Specification A48 , not less than Class 20 .
Reinforced concrete drainage pipe and/or culvert
pipe shall be as specified under Section 20-00 , PLANT AND.
YARD PIPING.
29-06 FINISH GRADING AND GRASSING: Topsoil shall be stripped
and stored as specified under Section 1-03. As construction
work proceeds or after construction has been completed the
Contractor shall backfill around all structures , shall
accurately form all berms and slopes , and shall finish
grade the site in general conformance with the contours
shown on the Plans . By general conformance it is meant
that surface of soil shall be shaped to conform to contours ,
but surface of sub-soil shall be left clown approximately
4"-6" to accommodate thickness of topsoil layer.
g�
1
29-6
All areas within the plant site, and within the tree
barrier, not occupied by structures , buildings , roads ,
walks , paved areas , riprap, etc. , shall be finish graded
and grassed. All cut banks , slopes , or other areas
outside of the construction area that have been disturbed
- by the Contractor' s construction operations shall also
be graded and grassed or otherwise restored as specified
herein.
Before placement of topsoil the sub-soil shall be
loosened to depth of not less than four (4) inches but
not greater than eight (8) inches ; and the surfaces
shall be cleared of all rock three (3) inches or larger
in size , all construction debris , or other objectionable
material. The topsoil, previously removed and stored,
shall then be placed over the prepared subsoil. The
loose depth of the topsoil shall be sufficient to allow
for natural settlement, so that after such settlement
has taken place the surface of the topsoil layer will
conform to the finished elevations and contours shown on
the Drawings . After placement of topsoil the surface
shall be raked to remove clods , stones over one (1)
inch in diameter, brush, roots , construction debris,or
other objectionable material.
Should the stockpile of topsoil not be adequate for
supplying the quantities of topsoil required for
preparation of the plant areas described hereinabove ,
the Contractor shall furnish, at his expense , topsoil
from other sources to meet any deficiencies .
After placement of topsoil the Contractor shall
immediately proceed with the grassing work . Grassing
work shall consist of soil preparation, furnishing and
spreading fertilizer, furnishing and spreading mulch,
and furnishing and sowing seed. All materials used shall
conform to requirements of Specifications of Virginia
(Department of Highways and Transportation. The section
numbers given hereinbelow are those of the Virginia
Department of Highways and Transportation, Road and
Bridge Specifications , July 1974 .
Seed - Section 257 .03
Fertilizer - Section 257 .04
Lime - Section 257.05
Mulch - Section 257. 07
29-7
Seed mixture shall be as follows :
Kentucky #31 Fescue - 83 Lbs/Acre
Kentucky Blue Grass - 2 Lbs/Acre
Foxtail Millet - 10 Lbs/Acre
Lime shall be uniformly spread over all areas to
be seeded immediately prior to soil preparation. Rate
of application of lime shall be two (2) tons per acre .
Liming shall be accomplished by use of any approved method.
Soil preparation shall be performed immediately
prior to seeding, and shall consist of loosening of the
soil by discing, harrowing or other approved methods . On
areas having a slope of 3: 1 or flatter, the soil shall be
loosened to a depth of approximately three inches (3") ;
and, on slopes steeper than 3: 1, the soil shall be merely
roughened to a depth of approximately one inch (1") . All
clods , loose stones , and other foreign materials which
are larger than 3" in any dimension shall be removed. All
gullies and washes that develop in the loosened soil
prior to seeding shall be repaired. Seeding shall immediately
follow soil preparation so as to avoid both compaction
and/or wash by heavy rainfall and crust formation by sun-
baking. Seeding will not be permitted on hard or crusted
soil surfaces .
Fertilizer shall be uniformly applied to the designated
area at the time of seeding; and rate of application shall
be 800 Lbs . 10-20-10 per acre .
Fertilizing shall be performed using any approved
method. If liquid fertilizer should be used, it shall be
kept agitated during application and shall be applied in
amounts sufficient to provide the same value of nutrients
per acre as that specified for dry fertilizer. Should
the Contractor elect to use liquid fertilizer in a
hydroseeder, the material shall be applied on a poundage
basis , mixed with the same volume of water that would
be used with dry fertilizer.
Seeding shall consist of uniformly sowing seed ,
spreading fertilizer, and spreading mulch on the areas
prepared as specified herein, and at the rates specified
herein . The cost of mulch shall be included in the cost
of soil preparation, seeding and fertilizing.
29-8
FIydroseeding will be permitted when approved equip-
ment is used and all mixtures are constantly agitated
from the time that they are mixed until they are finally
applied to the seed bed. All such mixtures shall be
used within eight ( 8) hours from time of mixing.
Nozzles or sprays shall not be directed toward the ground
in such a manner as to cause erosion or runoff.
When hay or straw is used for mulch, it shall be
spread over all seeded areas at the rate of approximately
two (2) tons per acre; and shall be applied to a uniform
depth, by an approved method, and in such a manner that
not more than ten (10) percent of the soil surface is
exposed. The use of wet hay or straw will not be permitted.
Mulch shall be applied within 48 hours after the seeding
operation. Mulch shall be anchored to the seeded surface
by spraying with asphalt; by discing or punching the
mulch partially into the soil; by use of approved netting;
or by use of other methods and/or materials approved by
the Engineer. The Contractor may use more than one method
on the project. In the event that asphalt should be used ,
it shall be applied in such a manner that uniform
distribution is obtained and that a rate of not less than
60 gallons per ton of mulch is obtained.
When wood cellulose fiber is used for mulch, it shall
be applied at a rate of approximately 1500 pounds (dry
weight) per acre and in such a manner that uniform distri-
bution is obtained.
It shall be the responsibility of the Contractor to
secure a satisfactory stand of grass of such uniformity
and cover as to present the appearance of a finished
lawn; to maintain all seeded areas until final acceptance
of the work ; to restore or replace any portion of the
grassing work that is found to be defective , which results
in an unsatisfactory stand of grass , or which becomes
damaged prior to acceptance of the work . The responsibility
of the Contractor shall continue to the following extent :
should all other work at the plant site have been
completed and accepted, and should the Contractor have
removed all forces and equipment from the plant site ,
he shall nevertheless , in the event of failure or partial
failure of the grassing work, be obliged under the terms
of the Bond given to the Owner to return such forces and
equipment to the plant site as are necessary to insure •
the satisfactory completion of this item of work under
the Contract.
29-9
•
29-07 LANDSCAPING: Landscaping work, when specified to be
included under this Contract by mention under the Section
of these Specifications setting forth "SPECIAL INSTRUCTIONS
TO CONTRACTORS" , will be paid for by a stated allowance
for landscaping set forth in the PROPOSAL FORM.
Should the landscaping work be specified to be
included under this Contract, the Engineers will furnish
to the Contractor preliminary sketches indicating the
desired planting and setting forth the tree and/or
shrubbery schedule.
Holes for setting trees and/or shrubbery shall be
excavated to a depth of at least 2' below the bottom of
the root system; and holes shall be such width (or diameter
as will provide 2 ' clearance outside of root system.
Space below root system and around root system up to
top of ground shall be filled with fertilized top soil.
Each tree , shrub , or plant shall be so set that, after
the fill earth in the hole has been settled and compacted
by water saturation, the planting line (bole or top of
root system) is approximately level with surrounding
ground.
All trees and shrubbery shall be planted in accordance
with the best established practice , and during the season
of the year most favorable for planting the trees and/or
shrubbery specified. All stock shall be healthy, first
grade, disease resistant to the extent available on the
market, properly transplant, and set. All planting shall '
be watered, protected, and tended for a period of sixty
days by experienced nursery workment. Any shrubbery or
trees lost (dying) or not evidencing healthy , satisfactory
growth within a period of one year shall be replaced at
no cost to the Owner.
29-08 FENCING: The Contractor shall furnish and erect fencing
complete with transition sections driveway gates , man-
gates , and concrete post anchors . The existing plant
site and the new plant site shall be separately fenced
as shown on the Drawings . Transition sections shall be
provided at sudden changes in slope and at vertical
rises . Erected height of fence shall be increased as
required at such locations so as to provide security equal
to that afforded by run of fencing of standard height.
29-10
Details of transitions shall be submitted to Engineers
for approval . Standard fencing shall stand 7 ' -0 " high
when erected, including additional 1' -0 " height provided
by extension arms and barbed wire .
Fence fabric shall be chain-link type , 2" uniform
square mesh, woven from No. 9 steel wire helically wound
and interwoven in such a manner as to provide a continuous
mest without knots or ties except in form of knuckling
or of twisting and barbing the ends of wires to form the
selvage of the fabric (knuckled at one selvage and
twisted and barbed at the other) . Fabric shall be hot-
dipped galvanized after weaving with zinc ASTM Specifi-
cation B 6 , and in accordance with ASTM A 392 , Class 2
weight. Fabric shall conform to ASTM A 392 , and coated
wire shall have minimum breaking strength of 1290 pounds/
foot .
Fence framing, including posts , rails , braces ,
fittings , post caps and tops , connector straps and bands ,
etc. , shall be steel, hot-dipped galvanized in accordance
with the following: tubular posts and braces , ASTM A120 ;
shaped posts and braces , ASTM 123 , castings and miscellaneous
hardware , ASTM 153. Post tops shall be provided with
extension arms carrying 3 lines of barbed wire , 4-point
pattern with extension arms set 45° out and top of arm
l' -0" above top rail. Barbed wire shall conform to
ASTM A121, with Class 2 galvanizing.
Top rails shall not be less than 1-1/4" (1. 66" O.D. )
standard weight pipe or 1-5/8" x 1-1/4" roll-formed sections .
Top rails shall pass through intermediate post tops , forming
a continuous brace within each stretch of fencing, and
shall be securely fastened to corner posts or terminal
posts .
Minimum sizes and weights of posts and framing shall
be as follows :
Line Posts : 1 . 90" O.D. Pipe @ 2 . 72#/LF
or 1. 875" x 1. 625 " x 1 .625" x 0 . 113" I1
@2 . 70 #/LF
Corner & Pull Posts : 2 . 375" O.D. Pipe @3. 65#/LF
or 2 . 5" x 2 . 5" Sq. Tubing @5 . 70#/LF
29-11
Braces : 1 .625" O.D. Pipe @2 . 27#/LF
or 2"x2" Sq. Tubing @3 . 85#/LF
Man-Gate Frames : 1. 625" O.D. Pipe @2 .27#/LF
or 2"x2" Sq. Tubing @3 . 85#/LF
All frames cross-braced with
3/8" 0 truss rods and connections .
Driveway Gate Frames : 1.90" O.D. Pipe connected with
fittings riveted each corner.
Each frame cross-braced with
3/8" g adjustable truss rods
and connections .
Posts for Swing Gates : 2-7/8" O.D. Pipe @5 . 79#/LF
Up to 6 ' Width or 3-1/2" x 3-1/2" R-F Section
@5 . 14#/LF
Over 6 ' and up to 13 ' 4" O.D. Pipe @9. 11#/LF
Over 13' and up to 18' 6-5/8" O.D. Pipe @18 .97#/LF
Over 18' 8-5/8" O.D. Pipe @24 . 70#/LF
All pipe posts shall be equipped with tops which
shall exclude moisture . End, corner, pull and gate posts
shall be braced with same material as forming top rail
and shall be trussed with 3/8" 0 rods and tighteners .
All posts shall be set in concrete foundations (Class
A concrete as specified herein) having minimum diameter
of 9 " and minimum depth of 36" . Line posts shall be
evenly spaced not more than 10 ' apart. Receptacles to
receive center plungers of driveway gates shall be
monolithically cast in concrete blocks at least 9 "
square x 12" deep.
All gates shall have positive type latching devices
with provisions for padlocking; and driveway gates shall
have center plunger rod, catch, and semi-automatic outer
catches .
WIMP) r441.111ASS/10MIVEI3
7'9 an5iciii91
A261 LI `-
ild.J8d_i
415lli11v lutos E1i",.1INYAI
40,,k &SEIyF�
2P I 0 7G
RIVANNA WATER & SEWER AUTHORITY
JP.
P. O. BOX 18 • CHARLOTTESVILLE. VIRGINIA 22902 • (804) 977-2970
O y
�R'OTTESV
October 14 , 1977
Mrs . Mary Joy Scala
Planning Dept .
Albemarle County
Re : Site Plan Review Comments-Proposed AWT Plant
Dear May Joy:
In answer to the comments in your letter of October 6, 1977 ,
point by point:
1. The Albemarle Co . Service Authority was contacted. Mr. Royce
Graham indicated that he would be satisfied with a copy of
those sheets showing water lines so as to locate a new meter.
This will be done at a later time suitable to the Albemarle
County Service Authority.
2 . All conditions on SP-373 have been met except that the
Emergency Overflow Lagoons are located below the 330 ' contour.
3. One copy of a 1"=50 ' site plan mark up as requested is
delivered with this letter.
4 . Rivanna Water & Sewer Authority is working with the County
Engineering Staff in order to fully determine the any con-
sequence of filling in land in the floodplain. A landfill
permit will be obtained by the Contractor who is awarded
the project.
5. A grading permit will also be obtained by the Contractor who
is awarded the project.
6. In talking to Mr . Royce Graham, this was not necessary, how-
ever, we will furnish the Albemarle Co . Service Authority
with a set of plans showing water lines .
7 . A plat developed in 1967 is submitted and correctly shows the
boundary lines .
8 . The landscape plan has not been finished at this time , however,
it is comprehensive in nature and will be maintained and
replaced as necessary. The landscape plan will be submitted
to the County Planning Office for approval as soon as it is
received.
•
October 14, 1977 Page 2
9 . Pavement Specifications are not available at this time, how-
ever, they will be submitted to the County Engineering Dept.
for approval as soon as they are received.
10 . Outdoor lighting on the site will be necessary for safety
precautions . Site lighting will consist of pole lights
similar to street lighting fixtures and lights near treat-
ment units where operators are required to work.
Please call if I can be of further assistance.
Sincerely,
9/(ir(ihea0/(4/11.61/A-
chae1 McGovern
Sanitary Engineer
MM/rc
•
P � 9
RIVANNA WATER & SEWER AUTHORITY
P. O. BOX 18 • CHARLOTTESVILLE. VIRGINIA 22902 • (804) 977-2970
JP
%1TESVO.
October 13, 1977
Mr . Ashley Williams
County Engineering
Charlottesville, Va. 22902
Re: Site Plan Review - AWT Plant
Dear Ashley,
The roadways at the proposed AWT plant will be of three types
and each is designed for a different function. They are listed
below:
1 . Concrete Pavement : Certain roadways and driveways will
carry heavy loads such as chemical delivery trucks , sludge
hauling trucks , maintenance equipment etc .
2 . Bituminous Pavement: Roadways which are subject to normal
traffic and parking areas .
3 . Surface Treatment: Roadways subject to intermittent use,
such as on the top of the emergency holding pond berms .
In discussing the roadways with the Engineer, Paul Krebs , he points
out that all roadways are in conformance with VDHU Specifications.
He will send us a copy of the proposed specification for the
road for your approval .
Drainage plans on the site will be shown on the site plan sub-
mitted to the Planning Commission, however, if you wish to
review this prior to the meeting, please come by our office
and look at the plans .
Thank you for your time and assistance in this matter.
Sincerely,
Michael McGovern
MM/rc Sanitary Engineer
cc : Ms . Scala
Planning
•
7a4
( RIVANNA WATER & SEWER AUTHORITY
/o� P. O. BOX 18 • CHARLOTTESVILLE. VIRGINIA 22902 • (804) 977-2970
40 O C}.
V October 11, 1977
Albemarle County Service Authority
c/o Mr . Royce Graham
P. 0. Box 6777
Charlottesville, Va. 22906
Dear Royce,
This letter confirms our telephone conversation of 10/11/77
concerning your request for additional information on the water
lines at the proposed AWT plant .
As was discussed we will furnish you with those applicable
plan sheets , marked-up so as to show a new water meter installa-
tion location, in the near future.
Please call if you require any more information or this does
not satisfy your Site Plan Review Comments to the Planning Dept.
of 10/6/77 .
Thank you for your assistance in this matter.
Si el ,
C.�
Michael McGovern
Sanitary Engineer
MM/rc
cc : M. J. Scala
Albemarle Planning Dept.
Zami
Aktt ,i4 It &ofvfotAiii,a-,4
ifinnu-4-tel lift tile AwT
ietavit, 4514, 4141-0. -i-
ftm 94/v4-y14114o . ix4
,44A4(4-ay2A eitA44- 4^;(1td
aei. A;wd itvcu .t�uti. �.w►u