[Ord. No. 11-2I 118 §1, 5-12-2016]
Earthwork shall be performed as required for specific types
of construction including utilities (water, sanitary sewer and storm
sewers), streets, sidewalks, and other public improvements.
[Ord. No. 11-2I 118 §1, 5-12-2016]
A. When explosives are used in the prosecution of the work, the contractor
shall follow Federal, State, County, and municipal laws and regulations
pertaining to the use and storage of explosives for rock and earth
excavation. All explosives shall be stored and used in a safe manner
and in compliance with all existing statutes and ordinances and all
places used for such storage shall be marked clearly "DANGEROUS EXPLOSIVES."
The contractor must obtain a separate permit from the City of Farmington
for each job and obtain a special conditions permit from the City
of Farmington if blasting within one hundred fifty (150) feet of a
well. To obtain a permit the contractor must submit along with an
application for a fire prevention permit a site plan, which shall
indicate the blast area, location of the storage magazine, and quantities
and type of explosives being used. The contractor shall be responsible
for providing a copy of the City permits and conducting pre-blast
surveys when blasting within congested areas or within three hundred
fifty (350) feet of any structure, well, railway, road, highway, or
other installation before any blasting can occur on a project site.
B. The contractor shall take precautions to minimize earth vibrations
and air blast effects and shall use blasting mats or other protective
means to prevent fragments from being thrown. No fly rock shall leave
the immediate area. A minimum of one (1) seismograph shall be used
on all blasting areas and the inspector may require more depending
on the surrounding area congestion. Seismic readings shall not exceed
one (1) inch per second at the closest structure or well. Monthly
seismic readings and copies of the blasting log shall be provided
to the inspector and Fire Official, unless more frequent readings
and logs are requested. Sound levels shall not exceed one hundred
forty (140) decibels at the seismic area.
C. Blasting periods shall be limited to normal daylight hours. Except
by special agreement with the City Engineer, these hours shall be
limited to between 9:00 a.m. and 4:00 p.m. each working day.
The contractor shall as a minimum provide the following warnings
before each blast:
1.
The blasting contractor or facility operator shall be responsible
for ensuring that the blast area is visually inspected and made clear
of people and/or animals before each shot.
2.
Three (3) five (5) to ten (10) second soundings from a siren,
air horn, or other approved warning device, with a minimum sound level
of one hundred forty (140) decibels at one hundred (100) feet shall
be sounded.
3.
WAIT a full thirty (30) seconds.
4.
Sound another five (5) to ten (10) second sounding.
5.
Immediately following the two (2) five (5) to ten (10) second
soundings, give a voice command from an amplified bullhorn or equal
stating "detonation to follow."
6.
No person shall enter the blast area until such time that the
blaster in charge has determined that no danger exists.
7.
An "all clear" voice command shall be given after the blast
and when the blast area is safe to enter for inspection.
D. The contractor shall save the City and its agents, officers, and
employees harmless from any claim arising out of the use of such explosives.
Removal of any item or material of any nature by blasting shall be
done in such manner at such time as to avoid damage affecting the
integrity of the design and to avoid damage to any new or existing
structure included in or adjacent to the work. Unless the plans, special
provisions, or the City Engineer restricts such operation, it shall
be the contractor's responsibility to determine a method of operation
to insure the desired results and the integrity of the completed work.
Blasting will not be permitted until the contractor has obtained proper
insurance (see Sec. F-12b of this Chapter) and has obtained a permit
from the City Building Inspector.
E. It shall be the responsibility of the contractor to notify each public
utility company, having structures or service in proximity of the
site of work, four (4) working days before any blasting can take place.
It is the contractor's responsibility to protect all structures from
damage or to repair or replace those structures at his own expense.
F. If during the course of the blasting program a complaint is lodged,
or a claim for damage stated, a post-blast inspection shall be conducted
on the property in question. The post-blast inspector should investigate
each complaint or claim thoroughly, and using, where appropriate,
the pre-blast inspector's report to compare pre-existing damages with
those being claimed. The post-blast inspector should in no way make
either comment or commitment to the complainant or claimant. The contractor
shall furnish the inspector two (2) copies of the complete investigation
and status of the claim within two (2) weeks of being notified of
the complaint or claim.
G. No additional payment will be made for blasting or complying with
all the blasting laws, regulations, or these requirements.
[Ord. No. 11-2I 118 §1, 5-12-2016]
All embankments (fill) required for construction of public streets
and alleys must be compacted. The method of compaction and densities
are as required in the latest revision of the City of Farmington,
Standard General Conditions and Technical Specifications for Public
Works Construction. All trees, shrubs, and plants designated to remain
within the public right-of-way shall be shown and clearly noted on
the plans. All other plantings shall be removed from the right-of-way.
The plans shall require that the public right-of-way be left in a
finished and neat appearing condition.
[Ord. No. 11-2I 118 §1, 5-12-2016]
The plans shall require that the street subgrade for both public
and private improvements be compacted as required in the latest revision
of the City of Farmington Standard General Conditions and Technical
Specifications Public Works Construction. All street sub-grades shall
have compacted aggregate (meeting Type 1 or Type 5 Aggregate Base
requirements) base in thicknesses as required in Table VII-1. Aggregate
should extend one (1) foot outside the limits of the street.