HomeMy WebLinkAboutBUTTE CO. PLANNING DEPT. 79-62 2r+
1 2 5 Po,u atio�
A'r`1 '01°aical ResUr�Xc
2
idistorit Viand
ENVIRONMENTAL'IMPACT ANALYSr5,
20
3,
potential Adverse Eal nvironmentacts
20
3.1
22
Services
P.Ulic a=
24 .i
3.1.2 Drainage nd Use
Agricultural Land/ha
25
3,1,3 Loss o�
2.6
SCI10015
27e
5 Traffic
3.1.6 ,Gt/owth, Tnducemen
29
acus which
Proposal �s
3.2. significant Environmental rop
t! Cannot be 'Avoided if the
30
'Measuwres_
Env 4 --`— V
31
3.3 .ronmentalprotection.
d Action..,
asec,
3. A; A %nar vas
�.
32 `
3.5 7xreve�rsible EnvJ.,ronme11tal Changes which
, 'cct is Imlemented.33
Result if the'Proj
Will R
.
-
I
3.5 Cumulative Effects,
35 (�
1\J �EI�ENCES
FV
611
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LOCATION MAP
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DU 04
1'r""fa' '�.. rano ry I ,
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ME;SOLIoN-
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99 IS
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�..A-a Nrtwn�.e �(� YeN�ief 70
PROJECT � " t syurrca ��aatr I � Ste..,jrtar ✓i
SITS
1 ��lf n�n�ll f r T JrgarrfcPP•C. �'' Co.
1,...-. attrn .�1-.•. .o �cz ��=1`� v'' �'hR. `" '�" s.•d`
r ,. / td 1•–..„.. r - r " a^ c' t` �a r'C•
Gr
Y lase H• Aff iy w S • "`I� } "
7r'" t t. ..�.•« .C�^� T. �Yi� e.,} Y rw,+Y!^ rdter Wrl•hwav - 5. !n
IkoWNSONS
(/ w i!, n \,ne11 l ! a _ r„ ,r- G• t n ai' rCORNR.
•�� �+rVet 1 tbeltY Road- Vrt3E Lrbr>C+ kan ,'' a� 1' ' '` ,4'rt -•1 t`1 Ce tit
n A .tet- tl—
` z !, r,+ F r`c ,7 � GMbLEY . ,rr..7„n� do
rlt« ' t Crkl } LCII% 7 a rvn c r i Y nG r _ *'hadle
NI!AM ;
_ -„• krad c �1 :!'.7 c a ���c �� r^Ki� ..�l,:I
t �•e+ Y• i Nlf balk r � �� � G^Y�:•a /.! � }.�,,,,��..,.,�
Chu drf
SCALE IN;MILES
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FIGURE 2
AREA MAP „
CITY OF GRIDI EY
CITY
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J� PROJECT SITE
SCALE
_
0 2
DISTANCE IN THOUSAND
FEET
I
,
i .2, 3 0 a n a r a tion
l 'cra.p
The
37 acnes will be subdivided, into lots, .a11
of
which will be developed for residential use.
The
tentative parcel map is shown as Figure 3.
Primary
features of the projao,,+ as prgposed are`.,,
a s
fol l ow
1)
Four connecting streets with four
cul-de-sacs will service the subdivision
with two actess:es onto the Gridley_C,o,lusa
t,,
Highway. No parcel vii l eq re a direct
it
access onto the highway,
2')
Water supply will be by the City, of
Gri dl ey. Adequate capacity exi s t s to;,
r,
serve the anticipa t;ed demand of the
subdivisior`i'; '
3)
wastewater will be convoyed by sewer to,
the new 1,05 MGD Gridley wastewater treatment
plant fortreatment and disposal. This plant
is scheduled for startup in mid-April 1979.
4)
A surface water drainage system will be
designed to accommodate runoff from the
10-year storm evonf,'�', Curbs, gutters:', and
underg- ound`' pipes ,�i l l convey all , stormwater
runoff ,to the drainage channel maintained
by Reclamation District 833,
5)
Electric service will be provided by the
City of Gridley. Tel ephone service wi 11 be
by Pacific Telephone Company. Natural gas
l l. All new u t i 1 i,,,ty
will be supplied by PG&E,_
lines will be underground,-
5
:,
„ . 7
a;
1
4i
TABLE; 2-1
- r
TEMPERATURE MEANS AND PRECIPITATIoN.,AVE'RAGES.,
YUBA CITYCA
Mean Temperature
�
Precipitation
Month
o
(or)
(in -cites)
Jan.
4'5,, 0
3.99
Fel .
50:1 1- L
3.66
Mai~,
54. S
2 , 68
Apr,
60.6
1.74
.,
Ma.y
66,E
U;80
Jun
73 7
0,22'
Jul , `
79.0
0.01
`
Aug.
77.0
0.02
Seri
0 75,5
fs ,
b 23
Oct,'.
654.5
1. 13
0
Nov:
54.1:
2,03
Dec.
47,0
3,88
Annual
62.320.59
Source;
El ford, 19703
(rf
loti
I K
I r
2,2
Geg1 ogi
Z 1
Descriptive Geology C
The project site lies on alluvial nater,ial
deposited by thq� streams in the area This
alluvium is, derived chiefly from basic meta-
morphj;c an basic igneous rocks of the lower
Sierrl..�s, ,r
2.2.2
Dy nawic Geo 1ogy r,
Several fain is 11ave the potential 'to affec.'t
the 'project si t�e though they arel located at
"
some di stance i n the Mo- thea Lode Belt of the
Sierras and in the Coast Rang,e.5 A north-
orthsouth
It
southshear zone cross `Yuba County about
15 1 pl,�1es east' of thp, 'project site, but is
considered inactive at present. ,5
In August, 1946, a miij<or earthquake struck
the 0rov111 a a.,rea� Prior to the 1975
disturb.ance,- it was `felt that no active
or potentially activ;e'_ faults, existed in
the Oro ville ,area, an:d none were expected
from trends of reg i6'rial faul is or earth-
quake epicenter,,.s,,
r
The. 1'975 epicenter ,4as between Oroville
s.
arid, Palermo about 1,2 milesnortheast; of
the project site. The earthquake measured
6, 2 o'n the Richter scale, with aftershocls_
11.
occurring as high' a;; 5, 0 on the Richter
Scal e'.
I`ti
j'4 ISI
�J Iwo
) I
' . 3 J
' ,� 0 i 1 S
y
The project site lies in the Great Central
Valley of California, noted for its deep,'
I
rich soils, which are considered exce'fient
for agricultural pursuits. The Butte County
General Plan Land Use Element cla,,4fies the
soil at the site as a mixture of Iroiclassific'ations
I, 11, and III. f)ese
clrassificati,ons are defined bellow:.
Class
Description Land Use C.aDabi,l
Areas dominated b ver, Ver /
y y y, gaotl cu"l,'tivable land
deep; nearly level, :moder•-with feel limitations. fix.,
ately well -drained soils, cellent agricultural land.
Little or no erosion pro.
bl ems.
.
I_I
Areas dominated` by very dood cultivable land with
deep; nearly"level moder-' moderate limitations. Cx-
atel,y well -,drained to some- cel l ent agricultural land.
-What : excess ively-drainod
Soils,
III
,.r
Areas dominated by shallow Moderately rood cul ti va bl e
to moderately deep, nearly land with limitations for
- level,. somewhat; poorly-- most crops, Poor drainage
drained soils, or alkali on level lands.
Soil on the project site, as classified by the
S -oils Conservation Service in 19,26 i's primarily
_
Gridley clay loam:, with a smaII''amount of Ilotcut
loam in the northeast corner, Brief descriptions:
of 'these two soil types foIlow:
i{
v
Flow t,s to the west. ` All surface„ runoff
on t#j� site w 1 1 fl- td ,nd I
� owowara,i�rt0 this
�i canal, designated Lateral E-1 by *oclamation
District 833; Personnel at RD833 have expressed
the opinion that ,maximum cap�kc 4,y of this
l lateral is approximately 24 cfs.+
1 Further, it
it
is their dpinion that the conveyance cas`
pacity
of Lateral E-:1 is 1 imited by the c<pac ty of
culverts which cross under the streets and
not by the capacity of the channe'`s. Drainage
channel slopes are very flat in Reclamation
Di strict 833 due to the nature of the tertra i n,,
r't is estimated by Geddis, Driscoll, and
Associates of.broville, that stormwater runoff
discharged from the project site to Lateral
E-1 for the one-in-ten-yea,r storm will be
6pproXimately 45 cfs.
2.5 Vegetation and klildl ife
`:
2.5,.1eation
T;;he natural vegetation of the area surrounding
the project site included, before development,
grassland riparian
t
he valley �oodl and, and
freshwater marsh vegetatiotS types;' Very few
remnants of these native plant communities now
exist in th�eti,northern Central Val 1 ey, Bpth
native and alien plants are plentiful along
roadsides and watercourses and a wide variety
of native and non-native trees are found in 3
residential and farm areas, parks, and recreation.
areas such as the Grey Lodge Waterfowl Management .
Area west of Gridley.
14
Trafc; counts of 2941 vehicles per day,
averagev aily traffic (ADT) on tho Gridley-
Col usa H ghviay at i;'he Biggs -Gridley Road
were t,ak �n by the Butte,County Public. Works
Departmen",� during the summer of 1977; The
current estimated capacity of the Gridley-
Col`usa Highway is 4,000 ADT at ,t,he 0figgs-
Gridley Road,
9
2.7 Munici-al Services
2.7.1 Wastewater Disposal
Wastewater' disposal will be via sewer to the
City of, Gridley municipal wastewater treatment
plant. The 1.05 MGD secondary treatment plant
is currently being completed, with plant start-
up schedul ed for mid -Apr -i 1 , 1979. Current
average- dry weather flow (AD'WP) into the
Gridley wastewater collection system is 0.49
MGD,, with an annual.; peak wet weather flow(PWO) .
of a
ppraximatl ey 2.0 MGD; 10 Approximatl ey 80
acre-feet of pond, storage is available at 'the
new wastewater treatment plant to store wet
weather fldws in�, excess of plant design ca,pacity.10
2 7.2 Water Sup'7
Water supply will be from the City Of Gridley_
r municipal system. The municipal water, system
currently operates withfour supply wells
which can supply a total of 2930 gpoi (4,2 MGD)
at 54 ps$.1 Thx pressure is presently limited
to 54 psi system -wide because older portions
of the system leak substantially at higher
system pressures. An ongoing system
1
�1
'I VI incr~ 'ae , stor'mwa�t0r' runoff' from the
VIA"
i�project�'01 :e could exceed the c;npacity ,of the
`Xd:'I(Is 4ae channel. r,
k t
r oj E t W' 11` res)ul t i,n the reduction
I .p
} fa
i
in ,acme a.n agr'icul'tural crop rs
e� y h°
� SS
i
Aia .ed number of school age
Gfden the City o:f Gr�i dl"ey
�chi1,�}�d` ca'u1d overbuy
Sdh0oI em
p ject site
YjtQ.A�llzas, d t_raff'ac from the.; ro
Gould e��4edthe present capacity of the <�
Gri d e Col us�a Hi g'hway,
',-7he ;impl'rnentation-of; this project
could result in the adverse cumulative effect
sing,i.he growth"
of the city
of incre,
further;�der.reasing, the amount sof agricult` ral
I•
�land�', acid increasing 'ythe burden ,n�publc
tie's and services; 'nc10dinga schools.
For purposes of analysis, implementation of
'the project is defined as not only r. p,� oning
the site and annexing it to the .,Ci ty1of
Gridley, but also constructing 110 family
dwel11ngs on the site. The rezone and
annexation $ by i tsel f wi 11 have 1 ttl'e or
0 no effect iin the.'environment, The environ
mental i-mpacts will rµesult from actions taken
as a' result, of an, affirmative decision
regardin,g the annexatior"r and rezoning issue
7herefores environmental issues wi'l1 be
assessedon,,,the assumption that, 11`0 single,
fami l y resi denc`es wi 1 1 be constructed as a,
»`
direct result of implemen;ti ng the proposed
project.
21
3.1.,'2` Drainage'
Construct•ion�\of the proposed subflvision will
substantially increase the, moonl: of stormwater
runoff from 'theproject site. Thi: present site
u,se as, an orchard l imi is t`he amount .of runoff
into U-833 -drainage Lateral ,F-1 It is
anticipated that virtually all stormwater runoff
from theI proposed subdivision will be channeled
into th,d RD -833 drainage lateral which passes
,r
through the proposed subdivision. Based, on
estimates by the manager of Reclamation District
833, drainage,[:,,ateral G-1 does not have)sufficient
capacity to accept the runoff from the one -in -ten
year storm from the proposed project site. The
estimated maximum capacity of Lateral E-1 ' i
approximately 24 cfs and the anticipated one -ins
ten- ear storm runoff from p is
y the project s7te
45 cfs:. `(herefore,. implementation of the project
will have_a significant adverse impact on the
exist"i,ng drainage system.
Stormwater runoff cannot be indscrminACy'
dumped into RD -833 drainage channels. The
Reclamation District has a, need to know the
quantity of runoff anticipated from development
adjacent to its channels as the ;,,primary purpose rf
of a reclamation district '1, s the drainage Of
irrigation and ,flood waters from agric.ul'tu,raI
lands:. Further, a reclamation district has a
right to accept or' reject runoff from a development
if that runoff will adversely impact or exceed
the capacity of a drainal�ge c,hanhel. For that
reason, letters of acceptance for runoff' are'
required by the City of� Gridley from of ther RD -833
or RD -:2056 before project approval to ensure
adequate stormwater runoff disposal,with'out
adver's�e impact on the reclamafioln districts,
Z