HomeMy WebLinkAbout0207 Land Improvement Standards 1979LAND
IMPROVEMENT
STANDARDS ORDINANCE
Table of Contents
Provision
Page
CHAPTER ONE- -TITLE, PURPOSE,
SCOPE AND DEFINITIONS
Short Title
Purpose
Interpretation
Scope
Definitions
iNTERPRETATION,
1
1
1
1
1
CHAPTER TWO--ENGINEERING STANDARDS
Application
Enumeration of Standards
3
3
CHAPTER THREE--CONSTRUCTION SITE STANDARDS
Application
Enumeration of Standards
16
16
CHAPTER FOUR--AUGMENTATION, COMPLIANCE AND FEES
Augmentation of
Compliance
Inspection Fees
Standards
20
20
20
CHAPTER FIVE--ENFORCEMeNT AND RELIEF
2O
CHAPTER SIX--MISCELLANEOUS PROVISIONS
Severability
Repeal of Conflicting Prior Ordinances
Effective Date
21
21
21
ORDINANCE NO. 207
AN ORDINANCE OF THE CITY OF CHUBBUCK, IDAHO, PROVIDING
LAND IMPROVEMENT STANDARDS; STATING A SHORT TITLE AND
THE PURPOSE OF THE ORDINANCE; GUIDING INTERPRETATION
OF THE ORDINANCE; SETTING FORTH THE SCOPE OF-THE ORDIN-
ANCE; DEFINING THE TERMS USED IN THE ORDINANCE; PRE-
SCRIBING ENGINEERING STANDARDS; PRESCRIBING CONSTRUCTION
SITE STANDARDS; PROVIDING FOR AUGMENTATION OF STANDARDS,
COMPLIANCE AND FEES; PROVIDING FOR ENFORCEMENT OF AND
RELIEF FROM STANDARDS IMPOSED HEREIN BY PROCEDURES SET
FORTH IN THE UNIFORM BUILDING CODE; REPEALING ALL CON-
FLICTING PRIOR ORDINANCES AND PARTS THEREOF TO THE
EXTENT ~OF SUCH CONFLICT; PROVIDING FOR THE SEVERABILITY
OF THE PROVISIONS OF THIS ORDINANCE; AND ESTABLISHING
THE EFFECTIVE DATE OF THIS ORDINANCE.
BE IT ORDAINED BY THE MAYOR AND COUNCIL OF THE CITY OF
CHUBBUCK, IDAHO:
CHAPTER ONE
TITLE, PURPOSE, INTERPRETATION, SCOPE AND DEFINITIONS
SECTION 1-1: Short Title. This ordinance shall be known
and may be cited as the "Chubbuck Land Improvement Standards
ordinance."
SECTION 1-2: Purpose. The purpose of this ordinance is
to protect the public health, safety and welfare by establishing
engineering standards for the design, installation, alteration
or repair of improvements to land, and.by providing environ-
mental protection and safety standards for construction sites.
SECTION 1-3: Interpretation. This ordinance shall be
construed liberally in the public interest to accomplish the
foregoing purpose.
SECTION 1-4: Scope. This ordinance shall apply to design,
installation, alteration or repair of any improvements to lands
which are open to public use, and to any construction sites,
within the jurisdiction of the City of Chubbuck.
SECTION 1-5: Definitions: For the purpose of this
ordinance:
A. "Block" means a piece or parcel of land or group
of lots entirely surrounded by public street% streams, railroads,
or parks, or a combination thereof.
B. "Comprensive plan" means a plan with maps, charts
and reports, together with any amendments thereto, adopted by
the City Council in compliance with the Local Planning Act of
1975 set forth in the Idaho Code.
C. "Condominium" means a development of land creating
a scheme of interests in real property defined as a "condomunium"
in the Idaho Code.'
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D. "Development" means any activity enumerated in
Section 1-4(B) of the Chubbuck Land Development Ordinance, as
now in effect and as it may hereafter be amended.
E. "Hillside development" means any development or
that portion of a development located in terrain having a
slope exceeding ten percent (10%).
F. "Improvement" means any physical addition or change
to land, which enhances the value of the land, which is incident
to a scheme to develop the land, or which benefits other lands.
G. "Irrigation facilities" means canals, laterals,
ditches, conduits, gates, pumps, and allied equipment necessary
for the supply, delivery, and drainage of irrigation water.
H. "Lot" means a piece or parcel of land separated
from other pieces or parcels by description, as on a record
survey map, or by metes and bound~ for purpose of sale, lease,
or separate use.
I. "Pedestrian way" means a walk extending entirely
through a block from street to street or providing access to
a school, park, recreation area, residential neighborhood, or
commercial~ or industrial area.
J. "ProjecC'means installation of any improvement or
the building of any structure upon land.
K. "Street" means a way for vehicular traffic, except:
(1) a parking lot or area for traffic movement within the parking
lot, (2) a way that is less than one hundred fifty (150) feet
in length; or (3) a way that serves or is intended to serve less
than three (3) households.
L. "Structure" means any construction or improvement,
other than a driveway or other hard surface at ground level,
upon or within land, and includes buildings, signs and walls
or fences more than six (6) feet in height.
M. "Uniform Building Code" means the latest edition
of the Uniform Building Code and appendices thereto, published
by the International Conference of Building Officials, which
has been adopted by the Mayor and Council of the City of
Chubbuck.
N. "Utilities" means installations or facilities,
underground or overhead, furnishing for the use of public
electricity, gas, steam, communications, water, water drainage,
sewage disposal, or flood control, owned and operated by any
person, firm, corporation, municipal department, or board duly
authorized by state or municiapl regulations, "Utility" or
"utilities" as used herein may~also refer to such persons, firms,
corporations, departments, or boards, as applicable herein.
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CHAPTER TWO
ENGINEERING STANDARDS
SECTION 2-1:' Application. The following standards shall
iapply to design, installation, alteration or repair of any
improvements to lands which are open to public use within
the jurisdiction of the City of Chubbuck. These standards
are applicable to those residential areas where buildings are
small and of. low height and where the ratio of the area
occupied by buildings to lot area conforms to the latest
city land use ordinance. For multi-story residential develop-
ment;design standards shall be prescribed by the City Engineer
based upon applicable national codes.
SECTION 2-2: Enumeration of Standards.
A. General Standards.
1. Streets:
(a). The arrangements, character, extent,
width~ grade, and location of all streets shall conform to
the Comprehensive Plan, shall integrate harmoniously with
existing and planned streets, shall be appropriate to
topographical conditions, shall enhance the public convenience
and safety, and shall facilitate the proposed uses of the land
to be served by such streets.
(b). Local residential streets shall be
designed to discourage their use by through traffic. Where
a development abuts or contains an existing or proposed
arterial street (as described below), railroad, or limited
access highway,'the CitY may require frontage streets,
reverse frontage streets, or such other treatment for the
appropriate use of the tract.
(c). There shall be'provided rights-of-way
of such width and as provided in the Comprehensive Plan;
provided, however, that the width of said rights~of-way shall
in no case be less than the following:
Type of Street Right-of-Way Width
· Arterial 80' 62'
(major thoroughfare carrying traffic into and out of the City)
Collector 66' 50'
(medium density carrier of traffic between
neighborhoods and districts of the City)
Local 50' 36'
(low density carrier of traffic within neighborhoods
and districts of the City)
Asphalt
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%1' Types of .streets within a development shall be
determined by the City Engineer, consistent with the compre-
hensive plan.
(d). Cul-de-sac streets shall terminate in
a circular turn-around with a right-of-way radius of at least
forty-five (45) feet. The City Engineer may approve an equally
convenient form of turning space where extreme conditions
justify. The maximum length shall not exceed four hundred (400)
feet from the entrance to the center of a turn-around, unless
the City Engineer finds that greater length will permit better
development of the subject property.
(e). Dead-end streets will not be approved
except in locations designated by the City Engineer as necessary
to future extensions in development of adjacent lands. In any
case, a dead-end street serving more than four (4) lots shall
provide by easement a temporary turning circle with a forty (40)
foot radius or other acceptable design to accomplish adequate
access.
(f). Loop streets shall be limited to a
maXimum length of two thousand (2,000) feet.
(g). Streets shall be planned to intersect
as nearly as possible at right angles, but in no event at
less than seventy degrees (70o). Streets intersecting an
arterial Shall do so at a ninety degree (90°) angle.
(h). Where any street deflects at an angle
of ten degrees (10°) or more, a connection curve shall be
required having a minimum center line radius of three
hundred (300) feet for arterial and collector streets and
one hundred twenty-five (125) feet for local streets.
(i). Streets with center line offsets of
less than one hundred twenty-five (125) feet shall be avoided.
(j). A tangent at least one hundred (100)
feet long shall be provided between reverse curves on arterial
and collector streets.
(k). At street intersections, property line
corners shall be rounded by a circular arc, said arc having
a minimum tangent length of twenty (20) feet.
(1). Street intersections with more than
four (4) legs and Y-type intersections where legs meet at
acute angles shall be avoided. "T" intersections, rather
than "cross" intersections, shall be utilized to the maximum
extent possible in residential developments.
(m). Maximum and minimum grades for all
streets shall be as determined by the City Engineer.
(n). Alleys--twenty (20) feet, when single
family residence units abut both sides: twenty-four (24)
feet if abutting multiple family, commercial, or industrial
districts~ Dead-end alleys shall be avoided.
(o). Streets shall be extended to the
boundary lines of the development, unless prevented by
topography or other physical conditions or unless the City
Engineer determines that such extension is not desirable for
coordination'of the development with the existing layout or
the most advantageous future development of adjacent tracts.
However, streets carrying non-residential traffic, especially
truck traffic, shall not normally be extended to the boundaries
of adjacent existing or potential residential areas, or
connected to streets intended for predominantly residential
traffic.
(p). Excessively long, straight local
streets in residential areas, conducive to high-speed traffic,
shall be prohibited according to the determination of the
City Engineer.
(q). Pedestrian walks on both sides of a
street, within the street right-of-way, together with curbs
and gutters.approved by the City Engineer, and paved vehicular
traffic area, shall be required on all streets in a proposed
development.
(r). Accesses to streets shall conform to
the "Standard Approach Policy" promulgated by the Division of
Highways, Idaho Department of Transportation.
2. Blocks and Lots:
(a) . Block lengths shall not exceed fifteen
hundred (1,500) feet nor shall they be less than four hundred (400)
feet; except when the average lot size is one-half (1/2) acre
or more, in which case the maximum block length may be extended
to a dimension reasonably determined by the City Engineer.
(b). Block designs shall provide for two (2)
tiers of lots, each facing upon a street, unless the City
Engineer determines that such layout is not feasible. In
addition'to pedestrian walks provided elsewhere in this
chapter, dedicated pedestrian ways with right-of-way width
of eight (8) feet or greater may be required where essential,
as determined by the City Engineer, for circulation or
access to schools, playgrounds, shopping centers, transporta-
tion and other community facilities.
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(c). The minimum area and dimensions of
all lots shall conform to the requirements of the land use
(zoning) ordinance of the City, as now in effect and as it
may hereafter be amended, for the district in which the
development is located.
(d). The side lines of all lots, as far
as possible, shall be right angles to the street which the
lot faces, or approximately radial to the center of curvatures,
if such street is curved. Side lines of lots shall be
approximately radial to the center of curvature of a cul-de-
sac on which the lot faces.
(e). Lot widths shall conform to require-
ments imposed by the City's' land use ordinance, as now in
effect and as it may hereafter be amended; but in no event
shall such widths be less than thirty (30) feet at the
street right-of-way line.
(f). Corner lots for residential develop-
ment shall be so designed as to permit conformance to the
street setback requirements of the land use (zoning) ordinance.
(g). No lot shall be divided by a City
limit line or the boundary line of a land use (zoning) district.
Each such boundary line shall be made a lot line.
(h). No remnants of land shall be left in
the development which do not conform to lot requirements, or
are not required, unless they are suitable and actually used
for common open space, utility easements, or other public
purpose.
(i). Lots having frontage on two non-inter-
secting streets shall be prohibited except where made necessary,
as determined by the City Engineer, by topographic or other
unusual conditions.
(j). Lots intended for non-residential use,
which are adjacent to existing or potential residential areas,
shall have such additional depth and landscaped buffer as the
City Engineer may determine, in order to maximize the
compatability of the adjoining developments.
3. Landscaping:
(a). The developer shall landscape all
areas within the street right-of-way, not covered by pavement,
curb, gutter or pedestrian walk. Trees and shrubs higher
than three (3) feet from the surface of the ground shall
not be planted or allowed to grow within thirty (30) feet of
the street intersection on a ~corner lot.
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(b). Whenever, as determined by the
City Engineer, the cuts and fills in a hillside subdivision
are of sufficient size or visibility to demand special treat-
ment, the developer shall landscape such areas with suitable
permanent plant materials and provide for their maintenance.
4. Utilities and other facilities:
(a). New electric, communication and
television lines shall be installed underground in accordance
with standards prescribed by the City Engineer based' on
applicable national codes. When facilities are installed
in public rights-of-way, the location shall be approved by
the City Engineer. When overhead utility lines exist within
the property being developed, said existing overhead utility
lines and additions or replacements needed to increase the
capacity or to improve service reliability may remain over-
head; provided, however, that any service drops into the
platted area from said peripheral overhead lines shall be
underground. When, as a result of development, it is necessary
to relocate, renew, or expand existing facilities within the
development area, the developer shall make the necessary
arrangements with the serving utility for these installations
to be placed underground. The developer shall be responsible
for the cost of underground service lines including those
serving approved street light locations. Electric lines with
a capacity greater than three thousand (3,000) KVA (kilovolt
amperes) are excluded from the requirements of this subparagraph.
(b). All underground utilities shall be
installed in street rights-of-way or utility rights-of-way
and shall precede the surfacing of such streets. Service
stubs to platted lots within the development for underground
utilities shall be placed to such length as to render unneces-
sary the disturbance of street improvements when service
connections are made. If connected to a City-Qwned system,
application and fees shall be the responsibility of the
developer in accordance with City requirements.
(c). Proper and adequate provision shall
be made for disposal of storm waters. The type, extent, location
and capacity of drainage facilities shall be determined for
each development by the City Engineer.
(d). Central sanitary sewer and water
systems shall be installed in all subdivisions where they are
within the service area of an existing public system and can be
reached by reasonable extension of said public system. Con-
struction plans and specifications for central sanitary sewer
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and water system extensions shall be approved by the City
Engineer and by the representative of any other governmental
entity having proper jurisdiction.
(e). If a development is not within the
service area of an existing public sanitary sewer or water
system, or otherwise cannot be reached by reasonable exten-
sion of said public system, alternate provisions for water
supply and sewage disposal shall be approved by the City
Engineer and by the representative of any other governmental
entity having proper jurisdiction.
(f). Street lights shall be installed,
at such locations and subject to such design standards as the
city Engineer shall approve.
6~ The location and carrying capacity of all
water, sewer and storm drainage lines or conduits shall be
in compliance with the City's comprehensive plan for such
facilities and shall be approved by the City Engineer.
7. Monuments shall be installed at locations
prescribed by the City Engineer.
8. Access to all of the foregoing utilities
and facilities, shall be provided by easements approved by the
City Engineer, unless they are located within areas dedicated
to the public.
B. Supplementary Standards.
1. General: Any street improvements, sanitary
or storm sewer installations, water installations or other
installations of other utilities, and any of their appurtenant
structures or equipment, that are damaged or destroyed as a
result of construction shall be repaired or replaced promptly
by the developer in compliance with directions of the City
Engineer.
2. Street Grading and/or Alley Grading:
'(a). Street grading shall be accomplished
to the approved line, grade and cross-section. Maximum allowable
street gradiant shall be as determined by the City Engineer.
(b). On all portions of the work requiring
embankment all undesirable materials shall be stripped prior
tO placing of embankment materials. Embankments shall be con-
structed in compacted layers not more than eight inches thick.
Compaction shall be accomplished by use of rollers and the
uniform application of Water resulting in a uniform and stable
subgrade. (Density 90% Standard Proctor required)
(c). All excavated areas shall be shaped
and compacted prior to the application of subbase gravel.
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(d)~ If borrow materials are required they
shall be secured from sources containing earth or gravel
materials of a quality not less than encountered on the site
of the work.
(e). The completed subgrade shall accurately
conform to the lines, grades and typical cross-section for
the type of work specified.
3. Compacted Gravel Subbase:
(a). Minimum 6 inch compacted thickness
required. Gravel materials shall be well graded (within the
limits stated below), shall consist of hard, durable fragments
of stone or slag, crushed.or uncrushed gravel materials;
shall be placed in not to exceed four inch in depth well
.compacted layers; may or may not require the addition of a
soil or mineral binder for pr6per compaction, but if binder
is required it shall be uniformly distributed throughout the
entire volume of the gravel. Gravel materials shall be
secured from previously approved sources.
(b). Gravel for subbase shall conform to
the following when tested in accordance with AASHTO Method T-27.
Passing
Passing
Passing
Passing
Passing
3" square screen 100%
1" square screen 75-100%
1/4" square screen 40- 60%
No. 10 Sieve 20- 40%
No. 200 Sieve - not over 10%
4. Compacted Gr~vel Base:
(a). Minimum 2 inch compacted thickness
required. Gravel materials shall be well graded (within the
limits stated below), shall consist of hard, durable fragments
~of stone or slag, crushed or uncrushed gravel materials;
shall be placed in not to exceed four inch in depth well
compacted layers; may or may not require the addition of a
soil or mineral binder for proper compaction, but if binder
is required it shall be uniformly distributed throughout the
entire volume of the gravel. Gravel materials shall be
secured from previously approved sources.
(b). Gravel for base shall conform to the
following when tested in accordance with AASHTO Method T-27.
Passing 3/4" square sieve
Passing 1/4" square sieve
Passing No. 10 sieve
Passing No. 200 sieve - not over
100%
40- 60%
20- 40%
10%
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5. Compacted Asphaltic Concrete Pavement:
(a). Minimum 2 inch'compacted thickness
required. Asphaltic concrete pavement shall consist of the
construction of a one course pavement in conformity with the
following and to the approved lines, grades and typical
cross-section. State of Idaho, Department of Highways,
Standard Specification, Section 905, shall be followed.
(b). Materials: Aggregate shall be well
graded within the following limits when tested in accordance
with AASHTO Method
Passing
Passing
Passing
Passing
Passing
Passing
Passing
T-27.
3/4" screen 100%
1/2" screen 25- 65%
#4 sieve 25- 40%
#10 sieve 20- 33%
#40 sieve 10- 25%
#80 sieve 5- 15%
#200 sieve 0- 5%
Aggregate material may be either crushed stone, crushed or
uncrushed gravel or slag. The course aggregate portion
shall have a per cent of wear of not more than 45 at 500
revolutions, as determined by AASHTO Method T-96-~2 (Los
Angeles Rattler Test). Asphalt cement shall be Penetration
Grade 85-100 and shall conform to all requirements of State
of Idaho, Department of Highways, Standard Specifications,
Section 702, spot test to be excluded. Percentage of asphalt
cement to total weight of aggregate shall be determined from
the surface area and absorption of the aggregate and shall
be between 4% 'and 8% of the total weight of the aggregate.
6. Portland Cement Concrete Curb and Gutter
and/or Gutter:
(a) ·
required, on all streets.
by the City Engineer.
(b). Concrete gutters will be required
across those sides of street intersections having a grade
of 6 percent or greater in those locations where drainage is
continuous across the sides of the intersection. These
gutters shall be continuous between integral curb and gutter
and shall provide continuous flow from one side of the street
to the other.
(c). Concrete materials shall consist of
approved Portland Cement, (6 bags of cement per cu. yd. of
concrete), water, (maximum 6 gals, per bag of cement),
Concrete curb and gutter will be
The type of curb shall be determined
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approved coarse and fine aggregate properly graded,~ and
proportioned such that.aworkable mix and durable concrete
is obtained.
(d). Excavation, base and/or subbase, as
required, shall conform to the corresponding sections of
these specifications.
(e). Forms maY be either wood or metal.
If wood they shall be 2" plank, surfaced, one side. If metal
they must be flat topped and of sufficient strength to
resist springing during placing and compaction of concrete.
All. forms shall be full size with approved spreaders and
clamps and when assembled shall be mortar tight.
(f). Curb and gutter may be machine laid,
or hand formed and shall be constructed with approved full-
depth cut crack control joints at ten (10) foot intervals,
closures excepted, which shall be a minimum of 5 feet in
length.
(g). All curb and gutter shall be given
a broom or wood float finish; "plastering" will not be allowed.
(h). Concrete shall be protected for a
period of two days by use~ofwet cotton burlap mats. Approved
curing compound may be applied in lieu of mats. Concrete
shall not be poured when ground is frozen; nor shall it be
poured at any time when the City Engineer determines that
danger of freezing is present, unless proper additivies and
protective measures are provided, as approved by the City
Engineer.
6. Concrete Driveways (within street rights-
of-way):
(a). Standard residential concrete drive-
ways shall be no less than ten feet in width at curb line,
exclusive of returns or transitions from 4 inch rolled to 6
inch rolled curb.
(b). Concrete shall be a minimum 6 inches
in thickness over minimum of four (4) inches of base course
and shall be proportioned as for concrete curb and gutter.
Surface to be given a wood float or light broom finish.
(c). Curing shall be by use of wet mats for
a period of two days or by use of approved curing compound.
7. Concrete Sidewalk:
(a). The location of the sidewalk shall be
determined from the type of curb and gutter required and the
width of the dedicated or public street width. In general,
where rolled curb and gutter is used the sidewalk shall be
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constructed adjacent to the back of the curb and shall be a
minimum of four (4) feet in width. Where barrier curb and
gutter is used the. sidewalk shall be constructed adjacent to
the curb and shall be a minimum of five (5) feet in width.
All sidewalk shall be constructed with a slope of~ one-
quarter inch per foot (1/4" : 1') from the property line to
the top of curb such that drainage is toward the traveled
way of the street.
(b). Sidewalks shall be a minimum monolithic
thickness of four (4) inches, except at driveway openings
where the'minimum monolithic thickness shall be a minimum
six (6) inches. Sidewalks shall have a minimum base of two
inches (2") of sand, slag or gravel. Sidewalks shall have
a wood float or light broom finish, and edges finished with a
one-half inch radius edger tool and shall be marked off with
approved crack control joints at five (5) foot intervals. One-
half inch premolded expansion joint material shall be installed
transversely at maximum 25 foot intervals, at each side of
driveway approaches, and at all places where the sidewalk
abuts other structures except longitudinal edge of curbs.
(c). Materials for concrete (6 bags of
cement per cubic yard) shall be as stated under Concrete
Curb Gutter and/or Gutter. Forms shall be adequately
constructed and secured as to grade and alignment and may be
either wood or metal. Concrete shall not be poured when
ground is frozen; nor shail it be poured at any time when
the City Engineer determines that danger of freezing is
present, unless proper additives and protective measures are
provided, as approved by the City Engineer.
8. Sanitary Sewers:
(a). All lateral sewers as required to
adequately serve the are~ to be developed, and their connections
to. present trunk or interceptor sewers, shall be constructed
as required. Location of nearest trunk or interceptor sewer
will be designated by the City Engineer.
(b). Sewer systems shall meet with the
"Sewage Works Design Standards" published by the Idaho
Department of Health and Welfare except where conflicting
design requirement are given below.
Item Basis of Design
Population ................... Determined by land use density
Laterals .................... ~.150 Gal. per capita per day
Industrial Plant ............. Add for process
Minimum Slope of Pipe ........ To produce minimum velocity of
2 ft. per sec., pipe flowing
full or half full
Item
Maximum Velocities .................
Manhole Spacing ....................
Minimum Size Laterals ..............
Manhole Size .......................
Lampholes ..........................
Pipe, Types
Basis of Design
.6 to 16 ft. per second, de-
pending on type of pipe
.400 feet apart maximum, at
changes in pipe size, or at
changes of alignment or grade
which cannot be accomplished
with a minimum of 150 ft.
constant radius curvatur~ in
the sewer line. Manhole
covers to be located 1/4"
to 1/2" below finished grade
of asphalt
.8 inch diameter
.48" diameter concrete, cast
in place or precast reinforced.
'24" diameter standard frame
and cover required (cast iron)
.Not permitted. All laterals
to terminate with manholes
.Proper grade as to strength
and quality of concrete;
cement asbestos (Transite);
PVC plastic pipe conforming
to ASTM D-3034, SDR35 or ABS
plastic pipe schedule 40 may
be used for laterals and
service lines up to 8 in. dia.
subject to the special back-
fill requirements stated
below.
n, coefficient of roughness ......... 0.015 (Kutter or Manning)
(c). All pipe to be laid true to line and
grade with watertight joints. Pipe to be properly bedded to
a height of at least one-half of its outside diameter. Trench
to be backfilled in compacted 8 inch layers to 90%'of density
(Standard Proctor). 'No rock or stone exceeding 3 inches in
diameter shall be used in backfilling trenches up to 18" above
pipe. No rock or stone exceeding 1 foot in diameter shall be
used in backfilling the
(d).
subject to all fees and
governing the same.
(e).
remainder of the trench.
The subdivider or developer will be
permits required by the City Ordinance
Special backfill requirements will be
required when PVC or ABS plastic sewer pipe is used. In these
cases the pipe shall be bedded with sand, or compacted soil free
of rocks and stones greater than 3/4" in diameter. This bedding
shall extend from 4" below the pipe to 18" above the pipe. No
rock or stone greater than 12" in diameter shall be used in
backfilling the remainder of the trench. In ground containing
large rocks or boulders all backfill materials to be segregated
(rocks greater than 12" in diameter to be removed) and inspected
by city engineer prior to backfilling.
(f Ail sewer service lines to lots shall
be marked with 2x4s the lengths of which are marked near the
top. A minimum of 2 ft. of 2x4 should extend above ground
after backfilling. The bottom of the 2x4 shall be located
at the sewer invert elevation. The top of the 2x4 shall be
painted with a bright fluorescent paint.
9. Storm Sewers:
(a).
bylthe City of Chubbuck,
their connecting laterals,
Storm sewer laterals,
shall be constructed,
as directed
together with
to existing trunk storm sewers or
'to such place or places
storm waters.
(b).
using the following:
Item
as will adequately dispose of all
Storm sewer systems shall be designed
Basis of Design
Q = Runoff ........................ Q = CIA
A = Area, in Acres ................ As required
C = Runoff = Coefficient ......... As determined by an acceptable
Rainfall authority on same
I = Intensity, inches/hr .......... One inch per hour
Minimum Slope of Pipe ............. To produce minimum velocity of
2 ft. per sec. pipe flowing full
or half full
Max. Velocities ................... 6 to 16 ft. per sec. depending
on type of pipe
Manhole Spacing ................... 400 feet apart maximum, at
changes in pipe size, or at
changes of alignment or grade
which cannot be accomplished
with a minimum of 150 ft.
constant radius curvature in
the sewer line. Manhole covers
to be located 1/4" to 1/2"
below finished grade of asphalt
Minimum Size Laterals ............. 12 inch diameter
Manhole Size ...................... 48" diameter concrete, cast in
place or precast reinforced 24
inch diameter. Standard frame
and cover required. (Cast Iron)
Pipe Types ........................ Proper grade as to strength and
quality of: concrete; vitrified
clay; cement asbestos (Transite)
corrugated metal, galv., asbest~.
bonded, asphalt dipped and pave6
n, Coefficient of Roughness ........ 0.015 (Kutter or Manning)
Inlet frame and Gratings .......... Cast iron to City specifications
Inlet Structures .................. Concrete directly connected to
subject to all fees
governing the samel
manhol~ not more than 50 ft.
(c). The subdivider or developer will be
and permits required by City Ordinance
dis
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10. Water Mains end. Service Lines:
(a). Ail water mains, including appurten-
ant valves, hydrants and connections to the City mains, shall
be constructed as required by the "Idaho Drinking Water Stan-
dards'' published by the Idaho Department of Health and Welfare.
(b). In addition water mains shall meet
the following design requirements.
Item Basis of Design
Size .'Min 6" I D (Min 6" I D
Main to Hydrant)
Pipe ............................. Cement lined ductile iron pipe,
Class 50, manufactured and
installed in compliance with
latest American Water Works
Association (AWWA) specifica-
tions for same. Bell and
spigot or mechanical type joints
Fittings ......................... Cast Iron, Class 250 for water
Valves ........................... Min. working pressure Water 175
(Including Auxiliary Fire' P.S.I. Iron body, double disc,
Hydrant) Bronze Mounted Parallel Seat,
non-rising stem, counter-
clockwise opening, 2 inch square
operating nut, in conformance
with latest AWWA Specification
for same.
Fire Hydrants .................... Min. working pressure, water 175
(With Auxiliary Gate Valve P.S.I. .5 inch valve opening, two
2 1/2 inch hose nozzles, one
and Valve Box) 4 1/2 inch pumper nozzle, left
hand opening national standard
1 1/2 inch pentagon operating
nut, fire hydrant red. Equipped
with auxiliary gate valve and
adjustable valve box. Ali to
conform to latest AWWA specifi-
cation for same.
Valve Boxes Valve boxes shall be cast iron
sliding'type, adjustable with
extension of 3 to 5 feet. Bell
end of lower section shall be
minimum 9" dia. by 9" in depth.
Shall be complete with drop
covers lettered "water".
Valve Spacing .................... All crosses or tees, Maximum
1,500 feet.
Fire Hydrant Spacing ............. No lot frontage shall be located
more-than 300 feet from a fire
hydrant as measured within street
right of way lines.
Dead End Line .................... Not permitted.
Thrust Blocks ........... ~ ........ All plugs, tees, bends, and
fire hydrants must be installed
with concrete reaction backing
extending into unexcavated earth.
Reaction backing must be installe~
such that the fitting is
accessible for repairs.
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Item Basis of Design
Min. Depth Pipe Cover .......... 5 feet top of pipe to finished
(Includes service lines) grade
Fire Flow, Any P~int ........... 750 fals. per minute
Minimum Pressure, Any Point .... 40 lbs. per sq. in.
Tests Prior to Backfilling ..... Normal water pressure for
(Includes all lines and period of 12 hours
hydrants)
Service Lines .................. Type K copper in accordance with
(Regular fee to be paid Federal Spec. WW-T-799 with
after application to approved Corporation (Mueller
City) No. 15000 or equal), and curb
stops (Mueller No. 15300 or
equal), each line, complete with
cast iron service box or lid
plainly marked "Water", with
regular pentagon operating nut.
Meters...' ...................... To be furnished and installed by
the City of Chubbuck. (Regular
fee will be charged.)
System Capacity ................ Minimum hourly demand of 150
gals. per hour per capita, plus
simultaneous fire flow.
(c). Ail installations shall be in accordance
with A.W.W.A. specification for the same. Pipe shall be laid
true to line and grade with adequate bedding. Backfilling
shall be accomplished in minimum 8 inch compacted layers to
90% of density (Standard Proctor). Backfill materials shall
not contain rock or stone exceeding 3 inches in diameter.
CHAPTER THREE
CONSTRUCTION SITE STANDARDS
SECTION 3-1: Application. Ail grading operations and
related site work in any development shall comply with the
standards set forth in this section in addition to other
requirements of this ordinance.
SECTION 3-2: Enumeration of Standards.
A. Hours of Operation: All grading operations in
or contiguous to residential neighborhoods shall be carried
on between the hours of 7:30 a.m. and 6:00 p.m. The City
Engineer may authorize operations at other hours only if it is
shown that restricting the hours of operation w6uld unduly
interfere with the development of the property and if it is
shown that the neighboring properties would not be adversely
affected.
B. Dust, Dirt and Materials Control: All graded
surfaces and construction sites shall be dampened or suitably
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contained to prevent dust or spillage of dirt, building
materials and waste articles on city streets or adjacent
properties. Equipment, materials and roadways on the site
shall be used or treated so as to cause the least possible
annoyance due to dust conditions.
C. Slopes: The City Engineer may require the
slope of a cut or fill be made more level if it is found that
the material being cut or the fill is usually subject to
erosion, or if other conditions make such requirements
necessary for stability. The City Engineer may permit
steeper slopes where the material being cut is unusually
stable.
D. Fill Material: All fill shall be ear~h, rock
or other inert materials free from organic material, and free
of metal, except that topsoil spread on cut and fi]]. surfaces
may incorporate humus for desirable moisture retention pro-
perties.
E. Drainage: Adequate provisions shall b~. made
to prevent any surface Waters from damaging the cut ~ace of
an excavation or any portion of a fill. All draina~a ways
and structures shall carry surface waters without p~oducing
erosion to the nearest feasible street, storm drain or
natural water course approved in advance by the City Engineer
as a safe place to deposit and receive such waters. The City
Engineer may require such drainage structures to be constructed,
or installed, as necessary to prevent erosion damage or to
prevent saturation of the fill or material behind cut slopes.
F. Finished Cuts and Slopes: The exposed or
finished cuts or slopes of any fill or excavation shall be
smoothly graded. All exposed slopes of any cut or fill
shall be protected by approved planting, crib walls or walls
and planting, terracing, or a combination thereof. Graded
surfaces shall be treated as provided in subparagraph (J)
below.
G. Back Fillings: Any pipe trench or other
trenching or excavation made in any slope of any excavation
or filled site shall be backfilled and compacted by a method
approved by the City Engineer to the level of the surrounding
grade.
'H. Compaction of Fills: Unless otherwise directed
by the City Engineer, all fills, governed by this ordinance,
intended to support buildings~ structures, or where otherwise
required to be compacted for stability, shall be compacted,
inspected and tested in accordance with the following provisions:
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1. The natural ground surface shall be pre-
pared by removal of topsoil.and vegatation, and, if necessary,
shall be graded to a series of terraces.
2. The fill shall be spread in a series of
layers, each not exceeding eight (8) inches'in thickness,
and shall be compacted by sheepsfoot roller or other approved
method after each layer is spread.
3. The moisture.content of the fill material
shall be controlled at the time of spreading and compaction
to obtain required maximum density.
4. The fill material after compaction shall
have a minimum dry density of not less than ninety (90) per-
cent of maximum dry density in all portions of the fill
requiring compaction, as determined by the AASHTO Soil
Compaction Test Method T99-57 or T180-57, or other testing
method approved by the City Engineer.
5. A written report of the compaction, showing
location and depth of test holes, materials used, moisture
conditions, recommended soil bearing pressures, and relative
density obtained from all tests, prepared by a Civil Engineer
or Soils Engineer licensed by the State of Idaho shall be
submitted to the City Engineer.
6. The City. Engineer may require additional
tests or information, if, in his opinion, the conditions or
materials are such that additional information is necessary,
and may modify or delete any of the above listed requirements
that, in his opinion, are unnecessary to further the purpose
of this ordinance.
I. Erosion Control and Landscaping: All cut and
fill surfaces created by grading except for fire break pur-
poses shall be planted with a ground cover that is compatible
with the natural ground covers in the City. Topsoils are to
be stockpiled during rough grading and used on cut and fill
slopes. When slopes too steep to support continuous ground
cover have been permitted and in lieu thereof niches and
ledges provided for planting, such slopes need not be planted
with a continuous ground cover, but may instead be screened
with vines and plantings. Cuts and fills along public roads
may be required to be landscaped so as to blend into the
natural 'surroundings. The existing on-site vegetation,
including trees with a trunk diameter of four inches (4") or
greater and other natural ground cover, shall be preserved
to the maximum extent possible.
J. Special Precautions:
1. If, at any stage of grading, the City
Engineer determines by inspection that the nature of the
formation is such that further work is likely to imperil any
property, public way, watercourse or drainage structure, he
may require, as a condition to allowing the work to be done,
that such reasonable safety precautions be taken as is con-
sidered advisable to avoid likelihood of such peril. Such
precautions may include, but shall not be limited to,
specifying a more level exposed slope, construction of
additional drainage facilities, berms, terracing, compaction,
or cribbing, installation of plant materials for erosion
control, and reports of a registered soils engineer and/or
of an accomplished engineer geologist whose recommendation
may~be made requirements for further work.
~ 2. Where it appears that storm damage may
result from work performed hereunder, the City Engineer may
direct that the developer take such measures as may be
necessary to protect adjoining property or the public safety.
On large operations or where unusual site conditions prevail,
the City Engineer may specify the time at which grading may
proceed and the time of completion or may require that the
operation be conducted in.specific stages so as to insure
completion of protective measures or devices prior to the
advent of seasonal rains.
K. If the City Engineer determines that public
facilities, or facilities to be dedicated to the public, are
being damagedln the course of development, the Engineer may
issue a directive to responsible parties that development
work cease until the damage is repaired and safeguards adopted
to prevent further damage.
directive shall be entitled
with respect to "stop work"
Code. The City may enforce
provided in said code.
L. No development
Parties adversely affected by such
to hearing under procedures provided
orders in the Uniform Building
the Engineer directive in ~he manner
shall be undertaken with respect
to land that is subject to periodic flooding, poor drainage,
excessive slopes or other terrain problems, unless special
design and construction methods are implemented with the
approval of the City Engineer and City Council, beyond the
.standards provided in this section, in order to resolve such
problems and to protect the public health, safety.and welfare.
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CHAPTER FOUR
AUGMENTATION, COMPLIANCE AND FEES
SECTION 4-1: Aug~nenLation of Standards~ After ,:onsult-
ing with the developer or builder, the City Engineer may
direct that particular improvements be installed in com-
pliance with such additional standards, consistent with
applicable national codes, as are made necessary by multi-
.story structures, heavy density or other special character-
istics of the development or site in question.
SECTION 4-2: Compliance. The City Engineer shall
monitor compliance with the foregoing standards; and no
developer or builder shall bury, cover or terminate work
on any improvement prior to approval by the City Engineer.
The developer or builder shall notify the City Engineer when
an improvement, or series of improvements, is ready for inspec-
tion; and the City Engineer shall cause the inspection to be
conducted without undue delay. To assist the developer, the
city Engineer may prepare a list of inspections that will be
required. Monitoring, inspection and approval activities by
the City Engineer shall not absolve the developer, builder and
their agents of responsibility to comply with the standards.
SECTION 4-3: Inspection Fees. The City Engineer shall
recommend a schedule of reasonable fees for inspec'tions. The
City Council shall, by resolution adopt such schedule or
any amendment thereto. The adopted schedule shall be published
at least once in the official newspaper of the City and posted
in the City Offices. The developer and builder shall be
jointly responsible for payment of fees set forth in a duly
adopted schedule.
CHAPTER FIVE
ENFORCEmeNT AND RELIEF
The standards prescribed in this ordinance shal] be
enforced~ and relief from such standards may be granl.ed, in
the manner set forth by the Uniform Building Code. In the
event that the City commences and prevails in a ciyil action
to enforce this ordinance, the City shall request and the
court may award the City its costs, according to court rule,
together with a reasonable attorney's fee, and such other
or further relief as the court may deem just.
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CHAPTER SIX
MISCELLANEOUS PROVISIONS
SECTION 6-1: Severability. If any provision of this
ordinance is held invalid, for any reason, by any court of
competent jurisdiction, such holding shall not affect the
validity or enforceability of any of the remaining provisions.
SECTION 6-2: Repeal of Conflicting Prior Ordinances.
All prior ordinances and parts thereof, which cover the same
subject matter governed by this ordinance, and which contain
provisions in conflict with the provisions of this ordinance,
are hereby repealed to the extent of such conflict.
SECTION 6-3: Effective Date. The rule requiring ordinances
to be read on three (3) separate occasions is hereby dispensed
with and this ordinance shall become effective upon its passage,
approval and publication as provided by law.
PASSED BY THE COUNCIL AND APPROVED BY THE MAYOR of the
City of Chubbuck, Idaho, this 29th day of June, 1979.
MAYOR
ATTEST:
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LAND~ROVM~ENTS STANDARD ORD.# 207
CITY OF CHUBBUCK, IDAHO
SUMMARY OF LAND IMPROVEMENT STANDARDS ORDINANCE
NOTICE IS HEREBY GIVEN that the Chubbuck City Council has
passed, and the Mayor has approved, Chubbuck City Ordinance
No. 207, which shall be known and cited as the "Chubbuck Land
Improvement Standards Ordinance." The ordinance becomes
effective upon publication of this summary in the Idaho State
Journal, the official newspaper of the City.
The ordinance establishes engineering standards for
the design, installation, alteration, or repair of improvements
to land. It prescribes criteria for design of streets and
layout of lots and blocks. It regulates landscaping and the
design and location of utilities, sanitary sewer, water and
storm drainage systems.
The ordinance sets forth standards with respect to work
practices, materials used and test and performance data for
streets, curbs, gutters, sidewalks, driveways, sanitary
sewers, storm sewers, water mains and service lines.
The ordinance further provides environmental protection
and safety standards for construction sites. It regulates
hours of operation, dust and materials control and practices
relating to slopes, cuts, fills, drainage and compaction.
It provides for erosion control and landscaping. It authorizes
the City Engineer to require special precautions to prevent
property damage from excavation or grading and to alleviate
weather-related hazards. It also empowers the City Engineer
to commence legal process to stop work on projects where public
facilities are exposed to potential damage or where'tOpographical
characteristics require special design and construction
methods.
The ordinance provides for augmentation of standards in
any of the foregoing areas by the City Engineer, consistent
with applicable national codes, when made necessary by multi-
story structures, heavy density of development or other
special conditions. It authorizes the City Engineer to
monitor compliance, to conduct inspections and to recommend
a reasonable fee schedule for adoption by the City Council.
It specifies that the developer, builder and their agents
are responsible for compliance with this ordinance.
The ordinance provides for enforcement and relief from
its standards by incorporating procedures set forth in the
Uniform Building Code (UBC). The UBC, in turn, provides
civil injunctive and/or abatement remedies for noncompliance,
and this ordinance authorizes imposition of costs and legal
fees upon noncomplying developers or builders in such cases.
The UBC permits developers or builders to apply for modifi-
cations or standards, or for approval of alternate materials
or methods, and sets forth the criteria for granting or
denying such applications.
The full text of this ordinance is available from
the City Clerk at the Chubbuck City Offices, 5160 Yellowstone,
Chubbuck, Idaho 83201.
I hereby certify that the foregoing summary is true
and complete, and that it provides adequate notice to the
public.
DATED
this 29th day of August, 1979.
Donald L. Burnett, Jr.
City Attorney