[R.O. 2011 § 515.010; R.O. 2010 § 515.010]
A.
All streets constructed in the City of Owensville, shall be constructed
according to the plans and specifications prepared by a Missouri Certified
Professional Engineer and approved by the City Engineer and adhere
to the following minimum standard specifications, to-wit:
1.
Use Of Streets Or Public Property. The contractor's operations
in public streets or alleys shall be confined to as small a space
as is practicable, so as not to cause undue inconvenience to the public
or abutting properties, and shall be subject to the approval of the
City Engineer.
Should the contractor require space other than the above, he/she
shall obtain same in private property at no cost to the City, by agreement
with the owner thereof.
2.
Maintenance Of Traffic. During the progress of work, the contractor
shall accommodate both vehicular and foot traffic and shall provide
free access to abutting property, fire hydrants, and water and gas
valves, to the greatest extent possible.
3.
Cleanliness Of The Work. The contractor shall keep the work,
and all property occupied by him/her in a neat and orderly condition
at all times. Waste materials, rubbish, and debris shall not be allowed
to accumulate. Contractor's equipment, temporary buildings, and
excess materials shall be promptly removed from City property as they
become no longer needed for the progress of the work. At the completion
of the work, the premises shall be left raked clean.
4.
Street Cleanliness. The contractor shall clean and keep clean
the streets, the work, and public or private property occupied by
him/her, from waste materials or refuse resulting from his/her operations.
Trucks hauling excavated material, cement, sand, stone, or other loose
materials from or to the site shall be tight so that no spillage will
occur on adjacent streets. Before trucks start away from the site
their loads shall be trimmed. Should the contractor be negligent of
his/her duties in maintaining the proper street cleanliness, the City
will take necessary steps to perform such cleaning and shall charge
the contractor for all the costs therefor.
5.
Maintenance Of Existing Drainage. Drainage through sewers and
drains shall be maintained at all times during construction and all
gutters shall be kept open for drainage. Where sewers are encountered
in the line of work, which interfere with the construction, the flow
in the sewers, including both dry weather flow and storm flow, shall
be maintained by either constructing a satisfactory flume or bypass
sewer or by pumping, or by both.
6.
Existing Improvements.
a.
The contractor shall give due notice to all City departments
or public service corporations whose tracks, poles, wires, pipes,
conduits, governmental survey monuments, bench marks or other structures,
may be affected by his/her operations.
b.
All public utilities including building service connections,
whether indicated on the plans or not, which in the opinion of the
City Engineer can be satisfactorily secured in place and maintained
without interfering with the proper execution of the work, shall be
taken care of by the contractor, or at his/her instance and expense
by the utility concerned, in such manner as to secure the safety of
the public and said structures.
c.
When the contractor deems it unsafe, impractical or impossible
to construct the work without moving a utility, he/she shall notify
the City Engineer; should the City Engineer concur in the contractor's
request, he/she shall notify the utility concerned to have said utility
moved accordingly. The work of moving said utility shall be at the
expense of the utility company and the City shall not be responsible
for any delay or expense which the contractor may encounter due to
the failure on the part of the utility company to promptly move said
utility.
7.
Safety Requirements. All work shall be carried on by the contractor
in a safe manner. He/she shall cause all necessary precautions to
be taken to protect workmen from all hazards arising from his/her
operations. To prevent accidents from harmful or dangerous gases,
no person shall be permitted to enter sewers or manholes without first
obtaining the permission of the City Engineer.
8.
Lights And Protection. The contractor shall erect and maintain
such strong and suitable barriers and such warning lights deemed necessary
to prevent the happening of any accident to health, limb, or property.
Lights shall be maintained between the hours of sunset and sunrise.
9.
Pumping And Drainage. All pumping or dewatering in connection
with the construction must be done in such a manner that the soil
and bottom of open trenches or tunnel excavations will not be pumped
away with the water and thus weaken or undermine existing structures.
The soil, under, around, or adjacent to the structure must not be
disturbed, removed or displaced by construction operations.
10.
Work In Freezing Weather. Unless written permission be given,
work liable to be affected by frost shall be suspended during freezing
weather. When work proceeds under such a condition, the contractor
shall provide approved facilities for heating the materials and for
protecting the finished work.
11.
Sanitary Convenience. Adequate sanitary conveniences for the
use of workmen, properly secluded from public observation, shall be
provided and maintained in a sanitary condition, and their use shall
be strictly enforced. Wherever manholes or catch basins have been
used, they shall be thoroughly flushed and cleared when no longer
required for that purpose.
12.
Surveys, Points And Instructions.
a.
The City, through the City Engineer, shall furnish such survey
lines and grades as may be necessary for the proper control of the
work; this shall not relieve the contractor of responsibility for
making careful and accurate measurements and for constructing the
work accurately to the lines and grades furnished by the City Engineer.
The contractor shall give the City Engineer reasonable notice of his/her
requirements for such survey lines and grades as he/she may require.
b.
The contractor shall furnish and place as directed all necessary
guide boards and appurtenances, and give such other incidental assistance
at the site as may be required by the City Engineer for staking out
the work. The contractor's working operations which interfere
with the activities of the City Engineer shall be temporarily suspended
for such time as the City Engineer may deem necessary. The contractor
shall give the City Engineer reasonable notice of his/her requirements
for such survey lines and grades as he/she may require.
c.
The contractor shall carefully preserve the points furnished
by the City Engineer, and he/she shall receive no extra compensation
for any materials or services furnished by him/her incidental to these
operations of the City Engineer.
13.
Test Borings. Subsurface information given on the plans is for
general information only. Its correctness or incorrectness shall not
affect the provisions of the contract. The contractor shall assume
all risks and responsibility and shall complete the work in whatever
material and under whatever conditions he/she may encounter or create,
without extra cost to the owner.
14.
Restoration Of Pavements And Walks. The contractor will be held
liable for damages done to pavements and sidewalks caused by his/her
construction operations. The City may either make repairs at the contractor's
expense or require the contractor to make repair.
15.
Test Samples Furnished By Contractors. All materials necessary
for the purpose of making required tests shall be furnished free to
the owner by the contractor. The cost of making tests shall be borne
by the owner.
16.
Ownership Of Salvage Materials. All old paving brick, curbing,
crosswalks, gutter, culverts, sewer pipe, iron pipe and castings and
similar materials removed during the construction work shall remain
the property of the contractor, unless otherwise directed, and the
contractor shall dispose of such material as directed by the City
Engineer.
17.
Portland Cement Concrete Pavement With Integral Curb.
a.
Scope Of Work. This work shall include the construction of non-reinforced
concrete pavement with a minimum thickness of six (6) inches, with
integral curb, on a prepared subgrade or base course in accordance
with the plans and specifications. Inclusion of reinforcement will
be allowed, and may be mandatory depending on site conditions.
b.
Materials.
(1)
Portland Cement. Portland Cement shall comply with
Section 1019 of the Missouri Standard Specifications for Highway Construction.
(2)
Water. Water used in mixing concrete shall be clean,
and free from injurious quantities of acids, alkalis, organic materials
or other deleterious materials.
(3)
Aggregates. Aggregates for concrete shall meet
the requirements of Section 1005 of the Missouri Standard Specifications
for Highway Construction; except that chert, flint or other siliceous
materials shall be limited to a maximum of two percent (2%) by weight.
c.
Proportions.
(1)
The proportions of aggregate to cement for any
concrete shall be such as to produce a mixture which will work readily
into the form angles and around the reinforcement without excessive
manipulation, segregation, or water gain.
(2)
The percentage of sand to total aggregate shall
be between thirty-five percent (35%) and forty-five percent (45%).
The water content shall not exceed six (6) gallons per sack for non-air-entrained
concrete and five and one-half (5 1/2) gallons per sack for air
entrained concrete.
(3)
The cement content shall be at least six (6) sacks
of ninety-four (94) pounds each per cubic yard of concrete.
d.
Mixing Concrete.
(1)
The concrete shall be mixed until there is a uniform
distribution of the materials and shall be discharged completely before
the mixer is recharged.
(2)
The ready-mixed concrete shall be mixed and delivered
in accordance with the requirements as set forth in Standard Specifications
for Ready-Mixed Concrete, ASTM C-94.
e.
Subgrade. The subgrade and base course shall be graded, compacted
and rolled to ensure maximum density to the exact cross section and
elevations and shall be tested with an approved template before concreting.
High areas shall be reduced to grade and low areas raised to grade
with approved material compacted in place, as directed.
f.
Forms. Forms for key ways shall be of steel. Flexible forms
may be used for curves of radius less than one hundred (100) feet.
Forms shall be cleaned and oiled before use and shall be securely
staked and braced and have rigid, tight connections at joints.
g.
Placing Of Concrete. Concrete shall be deposited with a minimum
of rehandling to avoid segregation. No concrete that has partially
hardened or been contaminated by foreign material shall be deposited
on the work, nor shall retempered concrete be used.
All concrete shall be thoroughly consolidated by vibrating to
eliminate voids.
h.
Joints. Expansion and contraction joints may be sawed or premolded
and shall be installed at right angles to the grade and the length
of the street unless shown otherwise on the plan. Sawed grooves shall
be at least one-sixth (1/6) the thickness of the concrete and shall
be filled with a bituminous, or other approved, joint sealing material.
(1)
Premolded Expansion Joints. Three-fourths-inch
premolded bituminous filler shall be installed as noted on plans,
and at all connections with existing concrete structures. Expansion
joint materials shall be cut to the full size of the pavement and
integral curb cross section. The top of the expansion joint shall
be scraped free of mortar.
(2)
Premolded Or Sawed Contraction Joints. Contractions
joints shall be installed at intervals of not more than twenty (20)
feet.
(3)
Longitudinal Joints. Joints between construction
lanes shall be of the keyed construction type. Dimension of key to
be as indicated on plans.
(4)
Construction Joints. Construction joints may be
keyed or butt type and shall be located to correspond to the regular
location of a contraction joint or not less than ten (10) feet from
any other joint. Butt type joints shall have dowels, on two-foot centers,
extending at least six (6) inches into and out of the concrete.
i.
Finishing Concrete.
(1)
The concrete shall be brought to the proper section
by means of a mechanical finishing machine, a vibratory screed or
by an approved type of strike off board. If a strike off board is
used, it shall be constructed of a material that will not warp, shrink
or sag and shall weigh not less than ten (10) pounds per lineal foot.
The strike off board shall be used as a tamping template, if other
equipment is not provided for this purpose, with an up and down motion
while being propelled forward manually. Any of the above devices,
if used, shall be adjusted to the exact crown of the pavement.
(2)
After the concrete has been struck off to the proper
crown and thickness, a float or lute not less than four (4) feet long
shall be drawn across the pavement. The lute shall be used with its
length parallel to the center line of the pavement and shall be operated
in a transverse motion, planning off high spots and filling in depressions.
Spacing shall overlap each area by one-half (1/2) the length of the
lute.
(3)
The surface shall be checked with a straight edge
not less than ten (10) feet in length, mounted on long handle and
any low spots filled in and high spots removed. All disturbed places
shall be refloated. The pavement shall not vary more than one-fourth
(1/4) inch from a ten (10) foot straight edge lain parallel to the
center line.
(4)
The final finish shall be made by brooming transversely
with a street broom having medium coarse fibers, or with an approved
burlap drag.
(5)
All exposed edges of the concrete at joints and
back of curb shall be finished with an edging tool of one-fourth (1/4)
inch radius.
j.
Integral Curb.
(1)
Integral curb shall be constructed at each side
of the pavement conforming to the dimensions and design as shown on
plans and shall be constructed of the same concrete as the pavement.
(2)
The curb shall be placed immediately after all
pavement finishing operations and before the concrete has taken its
initial set. The time elapsing between placing the pavement and placing
the curb shall not be more than forty-five (45) minutes. A thorough
bond shall be obtained between the pavement and the curb, if necessary
the pavement shall be roughened by a trowel or wire brush. After the
concrete has been placed in the curb forms, it shall be spudded or
tamped to ensure sufficient density to prevent honeycomb. When the
concrete has sufficiently set, the face forms shall be removed and
the curb finished to proper alignment, grade and cross section by
trawling and floating with properly shaped tools. No plastering with
cement mortar will be permitted. The final finish shall be made by
brushing transversely from bottom to top.
(3)
All traverse joints in the pavement shall be matched
evenly and continued through the curb and shall conform to the shape
of the curb.
k.
Curing. After the concrete has been finally finished and the
free water has left the surface, the exposed surface shall be sprayed
with an approved curing compound. After the side forms are removed
the sides shall be sprayed with the curing solution.
l.
Cold Weather Requirements. Concreting shall not be continued
when the air temperature is below forty-five degrees Fahrenheit (45°
F.). Unless the aggregate and/or water are heated to produce a placing
temperature of the concrete between sixty degrees Fahrenheit (60°
F.) and ninety degrees Fahrenheit (90° F.), and unless adequate
provisions are made for maintaining protection against freezing of
the concrete for at least seven (7) days after placing. No concrete
shall be placed on frozen subgrade.
m.
Slump Requirements. Prior to placement each batch of concrete
shall be slump tested in accordance with AASHTO T-119. The maximum
permissible slump for paving concrete shall be four (4) inches.
n.
Strength Requirements. Compressive strength test results performed
on standard six-inch-by-twelve-inch concrete cylinders made during,
and representative of, each concrete pour shall be submitted to the
City. Cylinders shall be made in accordance with ASTM C-31, and tested
in accordance with ASTM C-39. A minimum twenty-eight-day compressive
strength of four thousand (4,000) psi shall be demonstrated.
18.
Grading.
a.
Scope Of Work. Construction of embankments and grading shall
be in accordance with the plans and specifications.
b.
Excavation. Excavation shall conform to limits indicated on
the plans or specified herein. Excavation shall not be made below
grade except where rock or stone masonry is encountered or removal
of unstable material is directed by the City Engineer. Material removed
below grade shall be replaced with approved material thoroughly compacted.
Excavated material suitable for embankments or fills shall be stored,
if required, to minimize the use of borrow.
c.
Borrow. Where required to complete the embankment or fill, the
contractor shall provide the necessary additional material. The source
and quality of borrow material shall be approved by the City Engineer.
The contractor shall give the City Engineer at least five (5) days'
notice before removing borrow material from any approved borrow pit.
d.
Drainage. Spring or seepage water encountered shall be reported
to the City Engineer if drainage is not provided for by the plans.
The contractor shall keep the excavation free from water at all times
by pumping or otherwise. Excess or disapproved excavated material
shall be disposed of as directed by the City Engineer.
e.
Embankment And Fills. Fills shall not be started until the area
has been inspected and approved by the City Engineer. Embankment and
fill material shall be free from frost, stumps, trees, roots, sod,
or muck. Only approved material from excavation or borrow pits shall
be used. Material shall not be placed on frozen ground.
(1)
Preparing Ground Surface. When existing roadways
are to be covered with less than one (1) foot of fill the surface
shall be scarified and compacted to the same density as adjacent areas.
When fill is to be placed over wet ground that will not support the
weight of trucks or other equipment, the lower part of the fill shall
be made with sand, gravel or other selected material deposited in
a blanket layer no deeper than is necessary to support the operating
equipment. Top nine (9) inches of blanket layer shall be compacted
to required density before subsequent layers are placed.
(2)
Construction Methods.
(a)
Excavated material shall be so handled, conserved,
stored, and placed as to have the least desirable material at the
bottom of the embankments, grading up to the best material at the
top.
(b)
Soils shall be placed in eight-inch maximum layers
and compacted with a sheep's foot roller or other method of compaction
approved by the City Engineer. Places inaccessible to roller shall
be compacted with mechanical or hand tampers. Final rolling of the
top layer shall be with a smooth-wheel or vibratory roller. Stones
in earth fill shall be well distributed. No stones over four (4) inches
in diameter shall be within three (3) inches of finished subgrade.
Each layer shall be free of ruts and shall meet compaction requirements
before succeeding layer is placed. Layers shall be maintained with
crown or slope to provide drainage and prevent erosion.
(3)
Operation of equipment shall be distributed to
avoid rutting and unequal compaction.
(4)
Protection Of Structures. Culverts, headwalls,
and other structures shall be constructed before fill is placed. Fill
around culvert, headwalls, or other structures shall be carefully
and symmetrically placed in six-inch to eight-inch layers and shall
be compacted to the degree specified below.
f.
Compaction Requirement.
(1)
Practical Control. In construction of embankments
and preparation of subgrades the soil shall be compacted with approved
equipment. The soil shall be treated and worked so as to be damp,
but not wet. Each layer of the fill, subgrade or base shall be rolled
and compacted by approved means to achieve ninety-five percent (95%)
of the maximum dry density obtainable from that material, as determined
by AASHTO T-99.
g.
Subgrade Preparation. Rough subgrades, including slopes and
ditches shall be formed and maintained to provide proper drainage.
h.
Fine Grading Of Subgrade. Rough subgrade shall be cleaned of
all loose or foreign materials and reshaped if rutted. Approved materials
shall be added to meet required grade. Shaping and compacting shall
be done with blade graders and a power roller weighing five (5) to
ten (10) tons. Soft spots shall be reinforced and drained as directed
by the City Engineer.
(1)
Tolerances. Finished surface shall be smooth and
even and shall not vary more than three-eighths (3/8) inches in ten
(10) feet from true profile and cross section or more than one-half
(1/2) inch from true elevation.
i.
Finishing Slopes And Surfaces. All areas shall be finished to
smooth compact surfaces in conformity with the plans and shall be
raked free of stones or clods. Backfilling back of curbs and sloping
to walk or property line is included.
(1)
Maintenance. Finished work shall be drained and
maintained until final acceptance.
19.
Plant Mix Bituminous Pavement.
a.
Scope Of Work. This work shall consist of a bituminous mixture
prepared in an approved plant and placed on a prepared base so as
to give a compacted surface of not less than one and one-half (1 1/2)
inches in thickness.
b.
Materials. All materials entering into the construction of the
bituminous surface under these specifications shall conform to Missouri
Standard Specifications for Highway Construction as follows:
(1)
(2)
Aggregates.
(a)
Mineral aggregates shall meet the requirements
of Sections 1002 and 1004 of the Missouri Standard Specifications
for Highway Construction.
(b)
The gradation limits specified are master ranges
of tolerance to govern the mixtures made from any available raw material
or combinations thereof meeting the specifications. A closer control
within these ranges may be required for a specific project. The gradation
limits set forth are the maximum ranges which will be permitted. They
are not to be construed to mean that the gradation of the aggregate
for anyone contract may vary at random within these limits. The contractor
shall, within practical limits, provide aggregate for the entire project
which is uniform in gradation.
(3)
General. In addition to the above requirements,
the bituminous material and mineral aggregate shall result in a bituminous
mixture which shall be durable and retain satisfactory cohesion and
stability in the presence of moisture. Total mineral ninety-two percent
(92%) to ninety-six and five-tenths percent (96.5%); Bituminous material
three and five-tenths percent (3.5%) to eight percent (8%).
c.
Construction Methods.
(1)
Asphaltic pavements shall be placed on a prepared
surface consisting of compacted subgrade and compacted aggregate base
course. The surface shall then be primed in accordance with Section
408 of the Missouri Standard Specifications for Highway Construction.
Rate of application shall be 0.3 gallons per square yard.
(2)
Equipment and methods used to process and mix asphaltic
materials shall be in accordance with Section 404 of the Missouri
Standard Specifications for Highway Construction.
(3)
Paving Plant Inspection. For the verification of
the weight of proportion and character of materials, and for the determination
of temperatures used in the preparation of the mixture, the City Engineer
or his/her authorized representative shall have access at any time
to all parts of the paving plant.
(4)
Transportation Of Mixture. The mixture shall be
transported to the work in tight vehicles previously cleaned of all
foreign materials; no loads shall be sent out so late in the day that
spreading the mixture cannot be done in the daylight.
(5)
Spreading Coated Aggregate.
(a)
The mixed material shall be uniformly spread upon
the previously prepared base in the amount designated on the plans.
Spreading shall be done by means of mechanical spreader. After finishing,
the road shall have a smooth, uniform surface.
(b)
The mixture shall be laid only when the prepared
subgrade or underlying course is dry and weather conditions are suitable.
No mixture shall be spread when the atmospheric temperature is below
fifty degrees Fahrenheit (50° F.), or when there is frost on the
ground.
(6)
Compaction.
(a)
After spreading, the mixture shall be thoroughly
compacted by rolling with self-propelled rollers. The mixture shall
be compacted as soon as it is in a condition to receive the rollers.
The speed of the rollers shall not exceed three (3) miles per hour.
Rollers shall be in good condition and capable of reversing without
backlash. Rolling shall begin at the sides and progress gradually
to the center. Rollers shall travel parallel to the center line of
the road and uniformly lap each preceding track, as directed by the
City Engineer, until the entire surface has been rolled. Rolling shall
be continued until no further compaction is being obtained. Sufficient
rollers shall be available at all times to properly compact the mixture.
To prevent adhesion of the mixture to the roller, the wheels shall
be kept properly moistened with water, but an excess of water will
not be permitted.
(b)
The surface of the mixture after compaction shall
be smooth and true to the established crown and grade. Any mixture
that becomes loose and broken, mixed with dirt, or is in any way defective
shall be removed and replaced with satisfactory mixture, which shall
be immediately compacted to conform with the satisfactory surrounding
area.
(7)
Testing Surface. The finishing surface shall have
the thickness specified and shall be free from waves or irregularities
so that a straight edge not less than ten (10) feet long, when applied
to the surface parallel to the center line, shall no where show a
divergence of more than one-fourth (1/4) inch.
20.
Portland Cement Concrete Curbs And Gutters.
a.
Scope Of Work. This work shall include the construction of concrete
curbs and gutters on a prepared subbase in accordance with the plans
and specifications.
h.
Joints. Joints shall be installed as indicated, at right angles
to the grade and the length of the street unless shown otherwise on
the plan.
(1)
Expansion Joints. Three-fourths-inch premolded
bituminous filler shall be installed at 100-foot intervals, and at
all connections with existing concrete structures. Expansion joint
material shall be cut to the full size of the curb and gutter cross
section. The top of the expansion joint shall be scraped free of mortar.
(2)
Contraction Joints. Contraction joints formed by
metal spacer plates shall be installed at intervals of ten (10) feet.
All exposed edges of the concrete at joints, back of curb, and inside
of gutter, shall be finished with an edging tool of one-half (1/2)
inch radius.
i.
Finishing Concrete. The gutter shall be brought to the proper
section by means of an approved strike off board. The gutter shall
be formed with a properly shaped rule. The final finish shall be made
with medium fiber brush drawn across curb and gutter at right angles
to the length. The surface shall be cleaned with a straight edge not
less than ten (10) feet in length. The gutter shall not vary more
than one-fourth (1/4) inch from the straight edge lain parallel to
the length. Any low spots shall be filled and any high spots removed.
All disturbed places shall be refinished.
21.
Aggregate Base Course.
a.
Scope Of Work. This work shall include the construction of a
minimum thickness of six (6) inches of aggregate base for asphalt
pavement. When deemed necessary, a minimum thickness of four (4) inches
of aggregate base shall be constructed for concrete pavement. Construction
shall be in accordance with the lines and grades shown on the plans
and specifications.
b.
Materials. Materials for aggregate base shall conform with Section
1007 of the Missouri Standard Specifications for Highway Construction.
Type 2 aggregate base shall be used with all asphaltic pavements;
and Type 3 aggregate for base shall be used with all concrete pavements.
c.
Placement. Aggregate base shall be placed on a prepared subgrade
meeting compaction requirements. Additional requirements shall be
according to Section 304 of the Missouri Standard Specifications for
Highway Construction.
