HomeMy WebLinkAbout72-062~ Z - (o ~..
Code, certain standards governing sanitation, public improvements, fee
sch.edules, and o~rh.er sgecific requirements are ta be established by
resolution by the Board of Supervisors,
NOW, THEREFORE, BE ~T RESOLVED by the Butte County Board of
Supervisors as follows: '
I. GENERAL REQUIi2EMENTS:
A, Purpose: The purpose of these Standards is to provide
basic criteria far operational procedures in the preparation of plans,
ta establish design standards, methods of construction, and kind and
use of material in the development of pu.blic facilitiea within and
adja~ent to the subdivision and to provide fee schedules.
B. Detinitions: ~ In this resolutiort, the intent and meaning
af the terms that are used shall be as defined in the Butte County
Code or in Section 1 of the State Specifications,
1a The standard specifica~ions of the State o~ Calif-
.. ornia, Department of Public Works, Division of Highways, as presentiy
given in the January 1970 edition or as amended or revised in future
enactments and publications shall govern the construction materials and
procedures of all construction work rn Butte County e.~ccept as modifi~ed
by Butte County Ordinance or by these standards or future modifications
tYzex~eof .
2o Consulting Engineer: A registered civil engineer
of the State of California employed by a subdivider to prepare engineer-
ing plans and specifications for the subdivision.
II. PLANS:
A. General Procedure: Complete plans, specifications, and
calculations for and in connection wfth the,eonstruction of subdivisions,
~2ESOLtTTION ESTABLISHING STANDARDS PURSUANT
TO CHAPTER 20 OF THE BUTTE COUNT'Y CODE
WHEREAS, under ~ehe provisions of Chapter 20 of the Butte County
including any necessary dedications and easements shall be submitted
to the Department of Public Works fpr approval and shall receive
Department approval prior ~o the filing of a final map, or prior to
the beginning of construction of eny improvement..
B, Submission of Plans: Plans complete and in accordance
with this Resolutiori shall be submitted to the Department of Public
Works in duplicate together with the required specifications, computa-
tions, test data, and other informational material which may be necessary
for the proper design of the facilities, The Department of Public
Works will be a~lowed ~hirty (30) days tor checking, One set of plans
shall be returned to the subdivider or his designated agent indicating
approval of the plans or with suggested changes and/or additionai
supporting data as may be reqaested. If approved, or when resubmitted
with necessary corrections or additions, a reproducible shall be :
submitted along with two (2) sets of fina~ prints to the Department of
Public Works. The reproducible shall be stamped "Approved" by the
Director of Public Works and returned to the subdivider or his de-
signated agent. Only plans made from these reproducibles shall be
submitted for bids snd used for construction. There shall be no
changes permitted to an approved set of plans unless these changes are
s~bmitted to the Department of Public Works for approval as prescribed
for original plans. No changes shall be made in the approved plans by
any County agency unless such plans are in definite conflict with, or
do not conform to Cali~ornia State Law, the Butte County Subdivision;
Ordinance, or Subdivision Resolution, or good engineering practice.'
Should such conflicts be found, the Director o~ Public Works sha11
notify the subdivider or his designated agent in writing ar by making
corrections on copies of the plans which shall be returned to the
subdivider or his designated agent, The subdivider shall make such
revisions to the plans, note the date or revision on the plan sheet, and
furnish new copies o£ revzsed sheets to bidders or contractor doing the
work. Original tracingsof final "As Built" improvement plans sha11
be furnished without cost to the County.
-2-
;~
. ~~ I _~ __.
C, Plans Required: P1ans and profiles of roads and utilities
shall znclude the following sheets:
1, Title Sheeto
2. Layout Sheet,
3, Drainage Study She~t (required for large subdivisions
or subdivisions in hilly or mountainous country).
4. P1an and Profile Sheets.
5o Construction Detail Sheets,
6, Othe~ Pertinent Data,
D. Pian Deta il,s ;
l, The Tit1e Sheet (Sheet 1) sha~.~. shota the name of
the developmeait, the owne.r's name ~nd address, the consulting engineer's
name and address, an index of sheets and a location sketch of minimum
scale 2" ` 1 mi1e, including enough area to adequately indicate the
location of the subdivision, and the size of a11 sheets shall be 24" x 36"p
2o The Layout Sheet (Sheet 2) shall contain thereon '
the entire subdivision unit on one sheet in skeleton form showing drainage
features and sewer and water lines. Drainage pipe shall be indicated
by dauble dash l.ines, sewer by single heavy lines a nd water by heavy
dotted single lines, Appurtenances such as manholes, val.ves, and drop
inlets shall be s~.own in their proper location. The scale of the sub-
division shall be 1" ~ 100', or if the subdivision is too iarge to place
on ane sheet, a scale of 1" = 200' may be allowed, An index of the plan
and profile sheet shall be shown on the layout sheet,
3. 'The Drainage Study and Contou~ Sheet, if required,
shall contain thereon contours of the s~bdiviszon unit and the immediate
vicinity suff'icient to indicate the perime~er of areas to be drained by
each structure; calculations supporting the design of drainage studies
shall be placed upon the drainage sheet, Scale of map sha11 be of
sufficient size to clearly show the drainage features and the location of
major structures, but no smalier than 1" = 500'.
-3-
4, Sufficient Plan and Profile Sheets to detail all work
to be done in the subdivision sha11 be prepared. Horizontal scale shall
be 1" = 50' and vertical scale 1'~ = 2' except that in areas having the
majo~ity of slopes in excess of 5%, the scale may be increased to
1" - 5' a
5. Construction Detai.l. Sheets: Normal standard
construction de~ails may be referred to by sheet number as shown in
Appendix ~I~ bf this resolutiono If su~ficient space exists on the Plan
and Profile Sheets, specfal details may be pJ.aced there. Far a large
number o£ special details or intricate designs, a separate construction
detail sheet will be requiredo Scale wi11 be of sufficient size to :
adequately indicate a11 dimensions and details clearly.
III, ROAD STANDARDS:
Ao 5ubdivisione
lo' Road Grades:
a. Roads shall have a minimum, grade of Oo3 (three
tenths) of a foot ger 100 feeto
b. Roads in foothill areas below the 2,500 foot
level sha11 have a desirable maximu~n grade of 10% except that steeper
grades may be auth.orized for distances not ta exceed 300 feet where such
deep cuts or fills would be made as to preclude the development of
residential iots.
co Roads in mountain areas above 2,500 feet sha11
have a desirable maximum grade of 8% except that steeper grades may be
authorized for distances not to exceed 300 feet, Becision of the
Department of Public Works concerning grades in excess of 8% shall be
based upon ~ocal snow and freezing conditions, location of rvad in
relation to winter, sunshine, and other considerations.
2, Sight Distances:
a. Major roads shall be based upon a minimum,
vehi~le speed of 35 miles per hour,
b. Access, mznor, and cul-de-sac roads shall be
based upon a minimum vehicle speed of 25 miles per haur, _.
--4-
c. One-way loop roads shall be based upon a
minimum vehfcle speed of 20 miles per hour.
d. Roads with grades in excess of 5% intersecting
highways or major roads shall have a minimum of thirty {30) feet "storage"
area from the e~ge of pavement of the primary road.
3. Clearing Right-ot-way: All trees and brush sha11
be removed from the road xight-of~way to a distance of seven (7) feet
from the edge of the paved surface of the roadway regardless of the width
of ~he paved section and shall be cleared a minimum of three (3) feet
outside of any cut or fill s2ope, whichever of the above is wider, At
the intersections, clearing may be required to the praperty line for a
distance of 100 feet fram the centerline of the intersection sho~ld it
be found necessary to provide sa~e sight distance ~or approaching traffic.
4, Slope Banks: Cut and fi11 slopes sha11 normalZy be
1-1/2:1 or flatter, depending upo~ the material encountered, This may be
modified when engineering studxes indicate that stable slopes can be
maintained on a steeper grade. ~
5. Driveways: In hilly or mountainous areas where
sidehill cuts and fills make access to lots un~easible or costly to the
lot purchaser or where damage may occur to public right-of-way in f~ture
driveway construction, driveways shall be "roughed out" into each ~ot at
the time of grading the right-of-way and the excess material disposed of
in a satisfactory manner, Where side slopes exceed 10% far a distance
of 100 feet each side of centerline, garages may be placed within one
(1) ~oot of the property line on either side of the roadway.
6, Dead End Roads: All roads to be accepted for :
dedication and maintenance by the Board of Supervisors of the County of
Butte shall be paved. The proposed raad reservations not accepted by
said Board shall be paved to the property radius return,
7. Cul-de-sac: A11 cul-de-sac roads shall have a
minimum of 40 feet turning radius.
8, Sp1it Level Roads: Sp1it level roads may be permitted
in hillside subdzvisions upon approval of the design of plans and
-5-
profiles by the Department of Public Works. Pavement surface shal~ be
not less than 12 feet in width.
9. Road Draznage:
a. Where drop inlets are requzred or are installed,
they shall be in accordance with Appendix TII of this resolutian and
they shall be placed in gutters at distances in accordance with good
engineering practices. Desirable grades o~ streets and curbs and gutters
shall be not less than 0.3%.
Maximum spacing of drop inlets, catch basins,
and turnouts sha11 not exceed 600 feet. Increased spacing wi11 be
considered by the Director af Public Works if engineering calculations
verify the adequaey-of the proposed system, ~or subdivisions above
1,000 feet, the spacing of drop inlets shall be reduced 25% from the
above st~ndar~s.
b. Drainage pipe ~or underground drafnage shai~
be designed in accordance with standard hydraulic computations based
upon rainfall intensity and flow characteristics based upon the Manning
or Kutter fo~mula, Rainfall intensity for various areas is given in
Appendix IIT of this resolution,
c. Minimum size of pipe for street crossing of
not more than forty (40) feet between drop inlets shall be a minim~un of
12 inches in diameter,
d., Pipe may be reinforced concrete, CMP, ACP,
or other approved mater~al. The gauge or thickness of pipe shall be
determined by proper engzneering calculations for ~he material fn the
pipe furnished. Rein~orced concrete sha11 conform to A.S.T.M. Designation
C-76, Class 3. Corrugated metal and asphalt-coated sha11 conform to
State Standard Specifications.
e. Heavy-wall pipe sha~l be used in all areas
where drainage lines may be crossed with vehicular traffic such as
behind carbs where driveways may cross the pipe conforming to A.S~T.M.
Designation C-14 (extra strength),
fo Tn 1ot easements wher.e no veh~cle loading may
be expected, standard pipe may be used conforming to A.S.T.M. Designation
_ _ , > -6 -
_
__ - __ _ . , . ,
C-~~8 (irrigation pipe).
g. Continuaus pour concrete pipe (no-joint) may
be used if prior approval is obtained from the Director of Pub~ic Workso
h, Valley gutters at intersections, when permitted
or required, shall be of cancrete.
i. Minimum diametex of cross cu~verts shall be 15
inches diameter, Culverts in excess of 32 feet in length shall be a
minimuin of 18 inches diameter. Whe~e ~oads cross drainage areas, proper
engineering calculations determining volume of water and culvert sizes
and gauge or thickness shall be submitted with the construction drawings,
j. The alignment of closed conduits shall be as
nearly straight as practicable without undue bends and angle points.
Manhples shall be provided at alI angle points and at al1 connections
with intersecting conduits. Manhole intervals sha11 not exceed the
following, except upon approval o£ the Engzneer:
Less than 30" pipe-----60Q feet maximum interval
30" to 40" pipe--------800 feet maximum interval
40" pipe or greater---1000 feet maximum interval
Inverted siphons shall not be permitted except on a
temporary basiso
In the event of probable erosive conditions on closed
condui.ts, additional paving shall be provided as necessary to assure a
project life of 50 years.
k. Sacked concrete, formed standard State Highway
concrete headwalls, or galvanized flared end sectzons, properly engineered,
shall be instalJ.ed at the entrance and exit of road cuJ.verts where
required by the Department of Public Works.
1. Wh.en roads have no curbs and gutters and when
culverts cross road intersections at or near radius returns, box inlets
may be required and shall be constructed in accordance with Appendix III
of this resolution.
m. Drainage ditches and gutters along hillside or
inountain roads sha11 be paved wzth 2" o£ A,C. or other approved material
when the slope of the road xs 7% or more unless:
-7-
(1) Drain di~ches are in rock or other non-
erodable material.
(2) Sufficient cross culverts are provided to
eliminate scouring and eroding of the roadside ditches.
Unless otherwise app~oved by the Director of
Public Works, paved or lined gutters shall have a minimum slope of .0025
feet per foot and unlined gutters a minimu-n of .0035 feet per foot,
n. Downdrains and plant mix ditces will be required
on edge of pave.~nent where fil.l is ten (10) feet high or more and fill
is at low poin~e of vertical curveo Proper revetment shall be provided
for water spi].~.age on lesser fillsa
o. Curbs and gutters where required or installed
shal~, be constructed in accordance with Appendix III of this resolution.
Radi.us returns Sr~1i be vertical with 5' transition section as shown on
the drawn standards.
p. Earth channels constructed within the subdivision
sha11 have side slopes of 1:1 or flatter. Revetment, bank stabilization,
and stream stabilization, along constructed or natural channels, will be
required if the channel velociti.es are sufficient to cause bank or a.nvert
erosion.
The top of the bank shall be so graded tha t
side drainage wi11 enter channe~.s only at poin ts where str~sctures or
facilities are provided to prevent bank erosion.
10. Subgrade, Base and Pavement Standards: The sv.bgrade
base, and pavement shall be insta].1ed in accordance with State Standard
Specifications and shall conform to design standards as shown in the
Appendix I~ of this resolution for the appJ.icable road and subdivisian
type. These standa~ds are minimum. Should unstable soils or heavy'
traffic requirements indicate engineering studies be made, the requirements
for subgrade, base, and surfacing may be increased in accordance with
those studies. All roads to be dedicated to the County for maintenance
shall be surfaced with AC paving with the exception of the most remote
subdivisions.
-8-
ii. Private Unimproved Road Subdivisinns:
a. A maximum grade of ~5% shall be maintained in
pxivate road subdivisionso ,
b. The roadway shall be graded to a width of 20
feet and side ditches, drains, and culverts installed. Calculations
for drainage culverts wi11 be required.
c. Th.e surfacing of the roadway shall be optional
with the subdivider.
d. Sanitation and health requirements sha11 meet
a1Z requirmenets of standard subdivisions.
eo Road construction and drainage improvements shall
be the same as f or regalar dedicated roads with fihe exception of roadway
widths, pavzng, grade and compaction as shown on the typical section
for unimproved roads (RS-7),
B. Land Divisions
1. Construction Standards for approved access shall
be one of the following:
a. Very Low Density Land Divisions
resulting
Where the average/parcel size is 20 through 40
acres no actual road construction shall be requfred; however, satisfactory
evidence sha11 be provided zndicating t3~~t the deeded rig'r.:t-of-way is
adequate to allow for the even~ual construction of access roads from a11
parcels to a public road. Such access roads shall meet a1L the requirements
of sight distance and unimproved road standards as defined in Section ITI,
A, paragraphs 2 and 11, and as indiceted on Drawn Standard RS-7.
b. Law Density Land Divisions
Where the average resulting parcel size is
less than 20 acres, satisfactory evidence shall be provided indicating
that the deeded right-of-way is adequate to a11ow for the eventual
construction of access roads from all parcels to a public road.
On-site access roads shall be improved to
meet the unimproved road standards and sight distance standards as defined
in Section III, A, paragraphs 2 and ll, and as indicated on Drawn
Standards RS-7.
-9-
c. Exceptional Land Divisions
th~ee
In any one of the '/.~:° following situations,
land divisions sha11 be exempt from any o~ ~he requirements of the two
preceding sub-headings, to wit, a. Very Low Density Land Divisions,
b. Low Density Zand pivisions:
(1) tNhere the division creates only two
parcels from an original parcel of less ~han ~.50 acres, and where the
garcel map is approved subject to ~he explicitly stated condition that
there be no fuxther dzvision af these parcels until a 60 foot access is
provxded to a public road.
(2) s~~h~re the division, although altering
parcel lines, does not increase the number of parce~s. The original
parcels shall be determined by the last ~qualized assessor's roll.
(3) Vdhere the division creates a parcel to
be used by any polit~cal subdivision or public utility for non-residential
pu~poses.
No~withstanding any of the above provisions,
all aceess roads and rights of ways to each parcel shall be traversible
except in snowhseason.
Impravement reauirements of County roads to a
proposed land division sha11 be determined by the Board of Supervisors.
2. Drainage
The requirements for storm draina~e facili~ties
f'or land divisions shall be ~he same as ~'or private unimproved roa.d
sta.ndards, with the excep-~ion -~hat where i-~ is establS.shed that it is
not practical to ins-tall an on-site or off-site fac~lity, the
developer, in lieu o~' meeting these requirements, may install such a
system draining to a well-defined naturel drain, or, i~' all the resu3.t-- ~
ing ~arcels are within a drainage construction and maintenance dis-~rict
or within an area covered by a master plan approved by the Board of
Subervisors, the developer may satisfy the drainage requirer~ents by doing
each of the fallowing:
-io-
a, Paying a fee of no less ~han ~~100.00 pex parcel
or other such amount as may be determined by the Board of Supervisors
whzch shall be reserved for the cost of required drainage ~acilities,
and
b. Providing a~emporary solution which will not
cause adverse e~fects on other property or on the County road system.
3. O~vners' b9aintenance Associations
Whenever actual road canstruction or improvement
is required, the ~'orma.tion o~' an owners' association or nonprofit
corporation for ~he pu~pose of road maintenance sha1Z also be required.
TV. FEES:
A. Fees for a pr~liminary map shall be a flat ~20.00
payable to the Planning Department at the time of submissian.
B. Fees ~or filing tentative maps sha11 be a minimUm
of rp20.00 for subdivision o~' ten or less lots. ~'or subdivisions of over
ten lo~s, the fzling fee shal]. be ,~~2.60 per 1ot for the actual number
of lots shown on the tentatzve map up to 100 lots. There is an additional
charge of ~1.00 per ].ot i.n excess of 100. ~'ees on ten~ative maps shall
be submitted at the time o~' the submission of the tentative map and paid
to the Planning Department. Where a.n additional generaZ development
plan is re~uired by the County to show ~'uture development, only those
lo-ts actually in the proposed a.mmediate development wi11. be used as a'
basis for fee payment.
C. Fees for checking ~'inal maps sha11 be ~2$.OQ
plus ~2.00 per lat for a1~ lots in the subdivision and sha11 be paid at
the time the final map is submitted to the Department of Public lNorks ~or
checking.
D. Fees for checkzng construction plans shall be
~~25.00 plus ;j~2.Q0 per 100 feet or fraction thereo~' o~ new roadway con-
struction~ however, distances shall be measured ~'arom the centerline of the
existing street to the end of the new roadv~ay construction. Improvements
along existing. streets consisting of new curb and gutter and paving between
existing pavement and new curb and gutter wi11 no~t be subject to plan
checking fees. Fees shaZl be paid at the time plans are submit~ted ~o the
Departm~nt of Public Laorks #'or checking.
E. Fees for inspeetion shall. be 2;~ o~' the estimated
--11-
- _ __ . _. . _
con~truction cost of ~oad improvements inc~uding grading, drainage and
road constru~tion, and sewer line construction, sewex plants, and other
appurtenances. This fee sha11 be paid just prior ~o the time the final
map is presented to the Board of Supervisors for its acceptance or
prior to commencement of the construction of the subdivision improvements,
whichever comes first.
F. Fees for plan checking and inspection of unimproved
road subdivisions shall be the same as for improved road subdivision.
G. Fee for checking tinal parcel maps and/or record
of survey maps sha~l be a flat fee of $25.00 paid at the time of sub-
mission of the maps for chacking to the Department of Public Works.
H. When the subdivider p~oposes to use a cash deposit
in lieu of f urnishing a performance bond, a fee of 12% of ~he contract
or estimated cost of the work shall be made to defray accounting and
disbursemen~ expenses,
I. Parcel Maps, required by law to be filed in the
manner as for subdivisions, must be accompanied by the same fees as!
in the case of subdivisions.
J. For Bond Act proceedings, the fee prescribed under
Ztem "E" above shall be 3% rather than 2%.
V. MQNUMENTS :
A. Iron pipe monuments shall be set at all lot corners
a,nd at beginning and end of radius returns on property lines. These
pipe monuments shall be 3/4" iron pipe 18" long, plugged and tagged
~*ith brass or aluminum tags having the R.E, ar I.,S, number of the person
responsible for the survey.
B, Iron pipe monuments shal~, be placed at a~.l major
exterior boundary corners and at intervals of no~ .over 1,000 feet should
the major corners exceed this distance. These pipe mon~snents sk~a11 be
2" zron pipes 3' long, plugged and tagged as for 1ot corners.
C, A minimum o~ two concrete centerline monuments as
shown zn .Appendix III of this resolution sha11 be placed in each
subdivision of 50 lots or less at locations which are visible to each
-12-
other. Wteere subdivisions are ~u~vilinear, an addi~ional two E2)
monuments for each subdivision of 50 lots or less may be required. A
minimum of two (2) additional monuments shall be required for each
additional 50 lots. Locations and number of monuments shall be approved
by the Director of Public Works. Centerline monuments or unimproved
private road subdivisions may be offset to radius returns or other
approved locations agreed to by the engineer and the Department o~ Public
Works.
D, A concrete nail 22" in length with a 2" metal shiner
shall be placed in the centerline of the completed pavement at all
street intersections and at the end and beginning of all curves and at
intervals of not to exceed 1,000 feet.
E. When it is impossible to drive iron pipe monuments
into the ground, railroad spikes, o~ other suitable methods approved
by the Director of Public Works may be substituted.
VI. HEALTH AND SAFETY STANDARDS:
A. SewaQe Disposal:
1. Subdivisions
a. When a subdivision is located withzn a
reasonable distance of an existing, operating, and available sewerage
system, and it is practical and feasfble to connect with and be sewered
by the same, the subdivider may be req~ired to request annexation to
that system. Should the public entity be unable to service the sub-;
~ivision with sewers, septic tanks will be allowed if soil and other
conditions are suitable for the ~se of septic tanks.
b. When a subdivider proposes to develop a
community sewer system with treatment and disposal facilzties, he must:
(1) Provide a publzc entity adequate to
mazntain and.operate the system,
(2) Submit complete plans and specifi-
cations inciuding design criteria prepared by a registered civil
engineer to the Health Department and the Depar~ment of Pub~ic Works for
approva~.
-13-
(3? Obtain disposal requirements from the
`+Vat~r ~uality Control Board.
(~) Se~vage distributian and disgosal
system sha11 be designed in accordance with plans and specifications
a~proved by the Department of Public Health and the ~epar~ment of Public Z~orks.
. c. Sewer mains sha11 be a minimum of 6-inch
diameter and shall be of either vitrified clay, cast iron, or other material ~
approved by the Director of Public V~orlcs. The joints may be e~ther bell
and spigot or an approved rubber sea~ type packing. Placing o~ sewer
pipe, incZuding excavation and backfill, shall be in accordance with
Appendix III of this resolution. Manholes shall be spaced no far~her
apar~ than 3~0 feet. ~tanholes sha11 be a minimum of 48-inch diameter
and shall be o~ precast concrete and built in accordnace with Appendzx III
of this resolu~zon. All service laterals sha11 comply with the Uni~orm
Plumbing Code, latest edition~ and shall have a minimum slope of one~
eigh't~ inch per foot to ~he trunk sewer. Sewer clean out "Y" laterals ~
and other appurtenances shall be as shawn in Appendix III of this
resolution.
d. Comp~ete plans and specifications s~all be
submitted to the Department of Public Vdorks and the Department of Public
Health prior to the installation of se~ers in a subdivision and shall be
approved by ~he Director o~ Public 1Vorks prior to commencement of work.
e. When a subdivider proposes ~hat septic tank
sys~ems be used ~or sewage disposal, he shaZl have.percoiation tests
made under the supervision of a registered civil engineer, land surve~or,
or registered sanitarian and shall submit percolation data to the Health
Department in the ~orm recommended by said department.
In proposed subdzvisions where lots are to be
one acre or less in area, the minimum number of tests shall be as
follows:
(1) Where the gross subdivision area is 10
acres or less, at least one test per acre but in no case less ~han five
tes~s. ~Yhere soil oonditions indicate, additiona~ tests may be reauired
by the Health Department.
-l~'-
(2) Where the gross subdivision is over 10
acres, 10 tests minimum p~us additional tests as required by the Health
Department,
- I-n: ~~to~o~ezi-~ subdivisions where lots are to
be zn excess of one acre, the number of tests sha11 be one test for each
two acres or ane test per parcel, whichever.is 1ess; provided, howev'er,
that the Health Department may require additional tests where soil
conditions indicate the ne~d.
Where a shallow water table, hard pan,-rock,
or other impervious substratum exists which may affeet the operation
of septic tank systems, additional soil studies may be required by the
Health Department.
Minimum lot sizes shall be established
based upon percolation tests and topography in accordance with Appendix
VII of this resolution.
Should streams, canals, lakes, ponds, or
similar bodies of water traverse or border on the subdivision, lots
sha11 be of a size and shape, to permit septic tanks and leaching fields
to be installed at least fifty (50) feet from the natural bank of
said body of water.
2. Land Divisions
a. When a land division is located wfthin a
reasonabl,e dis~ance of an existing, operating, and available sewerage
system, and it is practical and feasible to connece with and be sewered
bq the same, the subdivider may be required to request annexation ta
that system: Connection to an existing sewerage system sha11 be deemed
practical and ~easible where the co.st per lot does nat exceed $500 or`
whare the cost does not exceed one tenth of the estimated sal.es price
of the lot.
b. Requirements for percolation tests are:
(1} Where sewer connectfon is not required,
a s2ptic tank shall be allowed, if soil and other conditions are su.itable
for disposing of sewerage effluent.
-15-
(2} 4]~ere a resulting parcel is 1~,000
square feet or Zess, percolation tests may be required wi~h respect to
~hat parcel. jVhen required such tests sha11 be on ~he basis of t~~ro
tests ~er ~.cre or Fractior thereo~. ti'T~ere the County Health Department
de~ermines that additional tests are necessary, additional perco~ation
tests or backhoe excavatians ma~r be ~equired.
(~) Lahere a resulting parcel exceeds
10,000 sq_uare feet, perco~atian tests and other studies may be req.uired
~h~~~h r.espec~ to such parcel, if the County ~Iealth Department determines
~hat soil conditions indicate ~he possibility of fu~ure health hazards.
septic
(~) Z~Jhere 9.ndividua3. wells and~tanlss are
to be installed on the same Iot, the minimurn lot area sha1l be 12,5Q0
souare feet.
(5} Where percolation tests are made,
the ininimum parcel area shall be determined pex tables in Appendix VII.
B . Wat er_ SupplY ~
1. Subdivisions
a. The subdivider shall state in a letter
accompanying tlz~ tentative map the proposed method of water supply for
the subdivision. Individual weZls shall nat be acceptable as method
o~' water supply for any subdivision in excess of ten (10} ~ots located
~rztha.n an urban area and within 700 feet of an existing publ~.c water
sy'stem whose service area includes or can include the subdivision.
b. The distribution system for any community
wa~ter system developed to serve a subdivision u~ithin an urban area and
within 1~000 feet o~' an existing public water system shall be deszgned
and installed according to good en;ineerin~ practi~ce and to standards
not less than those of the existing water system.
c. Where the water supp7.y is proposed by the
extension of service from an existing water system, the subdivider
..16-
shall,'prior to the filing of the final map, furnish the ~ealth Department
a statement from the water purveyor stating that the purveyor is willing
and able to supply water to the subdivision.
d. Should the subdivider propose individual we11s,
at least one test well for each twenty acres shall be developed by the
subdivider and tested for quali~y and quantity. Where topography,
geological conditions, or 1it~le information trom existing wells is
available, additional test we11s may be required by the Hea7th Department.
Test wells shall be pumped in a manner satistactory to the Health bepart-
ment and shall produce a minimum of five (5) gallons per minute except
that in recreational subdivisions, not less than three (3) gal~ons
per minute shali be produced during the dry season. This provision may
be waived by the Public Health Officer it sufficient well znforma~ion
has been developed in the area to assure adequate potable watero A
statement to the Health Department by a licensed well driller sha11 be
required in this case.
e. Should the subdivider propose to develop
a water distribution system for the subdivision, he shall:
(1) Provide a legal entity adequate to
construct, maintain, and operate the system.
(2} Submit complete plans and specitica-
tions including design criteria prepared by a registered civil engineer
to the Health Department for approval. Wells shall be designed and
installed as per Appendix VTTI of this resolution. Al1 water systems
with the surface sources shall be provided with treatment facilities.
satis~actory to the Department of Publ~c Health.
(3) Where a spring is to be used for the
water supply system, a recognized water geologist shall state the yield
in gallons per minute during the dry seasons.
(4) Provide minimum source capacity and
storage as shown in Appendix IX of this resolution.
(5} Provide safe, potable water meeting
the chemical and bacterio~ogical standards of the U. S. Public Health
-17-
Service. No surface water shall be considered potable without adequate
treatment.
(6) Provide all information required by
the Ca~ifornia Pure Water Act as required by the Hea~th and Safety Code,
Section 40~0-4035 of the State of Californiad
f, Existing we~ls which are to be abandoned
in a subdivision shall be filled and capped in a manner approved by the
Hea~th Depar~men~,
2. ~and bivisions
a. Where the average resulting parcel size is 40
acres or larger no information on the availability of domestic water is
required.
b. Where the average resuZting parcel size is less
~han 40 acres, the division shall be approved only if one of the following
requirements is met:
(1) The developer presents supporting data
relatrng to existing we~ls or other supplies suitable to the County Health
Department which demonstrate domestic water is available in quantities
of not less than 3 gpm.
(2) A note is placed on the final map as'
follows: "WATII2: No evidence of domestic water is available,"
C. Fire Standards: (For subdivisions within a~ire
district or County Fire Hydrant
Service Area and having water
capable of adequately s~pplying
fire hydrants)
l. Requirements:
a. Fire Hydrants - a fire flow minimum of 3000
gallons per minute is requixed ~or a c~uration period of ten (10) hours
in commercial and zndustr~.al areas of the County.
b. A fire ~low o~ 1,500 gallons per minute is
required for a duration period o~ six (6) hours in urban subdivisions
-is-
wfiieh are zoned R-3 or closely build-upon resident~l areas in which
churches, schools, and other similar structures would be interspersed.
c, A fire flow of 750 gallons per minute is
required ~'or a duration period of four (4) hours fn standard residential
subdivisions in which the system is supplied by a public water agency,
district, or municipality.
' d. A fire flow of 500 ga~lons per minute is
required for a duration period of four (4) hours in mountain ox rural
subdivisions that are se~ved from a public water agency, district, or
municipality.
e. Where adequate water is avail.able from a
mutual or other locally formed agency, the subdivider wi11 be encouraged
to furnish the maximum fire protection available over and above the
~ minimum requirements.
Static wate~ pressures shall be such as to'
deliver the required fire £lows at a flowing or reszdual pressure of
20 pounds per square inch over and above the normaL cons~unption demands
of the system. In no case shall the fire hydrant spacing be more than
800 feet f rom hydrant to hydrant, or more than 400 f eet from fire
hydrant to the center af any lot.
2. Materials: Fire hydrants shall be of the type
manufactured by M. Greenberg's Sons, or equal, and shall be of the
, zmproved Los Angeles Type 5~ GR tor the high valve and heavy industrial
areas and Type 53 GR for the closely built-upon residential and standard
residential. The type required for mountain or rural subdivisions of
inadequate water supply shall be M. Greenberg's Sons Type I23 Wharf
', Hydrant as shown in Greenberg's Catalog "T", or equal.
' 3. Canstruction: Fire hydrants shall be constructed
in accordance with Appendix III of this resolution,
4. Distribu.tion System: The supply mains, arteries,
and secondary feeders shall extend throughout the system, These shall
be of sufficient size, considering their length and character of the
sections served, to deliver fire flow and consumption demands to a11
areas served, They shall be properly spaced and looped.
_Zg_
No pipe less than 6-inch diameter is .
~ecammended for fire service and 6-inch pipes should be limited to a
length of not ~ver 600 feet unless looped, except that in mountain ruraZ
subdivisions ~~inch pipe may be allowed in place of 6~inch pipe. Tn
commercial, industriaZ, or urban subdivisions, zoned for R-3. or high
density buiZding, pipe sizes should be not less than 8 znches and
interconnected within every 600 feet.
5. S~acinA of Valves: The dis~ribution system shall
be eauipned with a sufficien~ number o~ valves so located that no single
case of accident, breakage, or repair to the pipe sys~em will necessitate
the shutdown of an artery or a length of pipe greater than 1,b00 feet.
Attached hereto and incorporated herein as if set forth in full
are Appendixes I, ZI, III, IV, V, VII; V~II, and IX.
VII, Resolution ~o. 51-68 is hereby superseded and replaced.
PASSED A~'D A~OPTED by the Butte County Board of Supervisors this
~th day of Aprfl , 1972. by the following vote:
AYES: Supervisors MaBigan, Mexi~lop, Reynolds an~ Chairman Gilman
,, = NOES: Supex•visor Maxon
ABSENT: None
I~OT VOTING: None
1
A ILMAN, Chai n.of the Butte'
ty Board of pervisors
ATTEST:
CLARK A, N~LSQN, County Clerk
and ex-officio Clerk of the Board
~y ~X.~ -t~ 4 ~-~~•.,