This document outlines safety regulations for hydraulicking operations from the DENR Administrative Order 2000-98. It defines hydraulicking as the excavation of gravel banks using high-pressure water jets. The regulations require delineating hazardous areas, shutting off water before maintenance, testing hydraulic installations, maintaining safe distances from water jets and faces, and ensuring stability of deposited materials. Electrical cables on floating dredges must be supported by stable floats with safety features.

1. Denr administrative
order 2000-98
MINE SAFETY | EM 412
SECTION 45 HYDRAULICKING
SECTION 46 DREDGING
SECTION 47 HEAVY EQUIPMENT OPERATION
a. gENERAL PROVISION
[ J o C h ]
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Part 2
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2. Denr administrative
order 2000-98
MINE SAFETY | EM 412
SECTION 45 HYDRAULICKING
[ J o C h ]

3. ● WHAT IS HYDRAULICKING?
● HOW DOES IT WORK?
● SAFETY OPERATIONS
Section 45 hydraulicking

4. ● WHAT IS HYDRAULICKING?
The excavation of gravel banks
by streams of water
under pressure from nozzles.
Hydraulicking is one of the methods
in placer mining.
*Au, Sn, magnetite, titanium, W, & zircon, garnet, diamonds, gems
Section 45 hydraulicking

5. ● HOW DOES IT WORK?
*HYDRAULIC MONITOR
*also known as hydraulic canon, water cannon, high-pressure water jet
It can be maneuvered either by manual, electric, hydraulic, pneumatic.
https://dovemining.com/hydraulic-cannons-monitors/
https://magnumaustralia.com/en/water-cannons.html
https://www.sierracollege.edu/ejournals/jsnhb/v2n1/monitors.html
Section 45 hydraulicking

6. RULE 438:
The area within which hydraulicking is being carried out
shall be marked with signs posted around it and
unauthorized entry of person on the area is prohibited.
a. Danger signs shall be posted around tailings dump or
siltation pond.
b. Freshly formed banks of clay shall be sectioned off by
warning signs.
c. Dumps and ponds constructed with earth banks shall be
fenced off.
Section 45 hydraulicking

7. RULE 439:
Before any hydraulic monitor is put into
operation, all persons within the radius
of the water jet shall leave the area.
Only employees directly concerned
with the operation of the monitor
shall be allowed near in such
during operation.
Section 45 hydraulicking

8. RULE 440:
All work involved in
1
shifting or repairing the monitor
2
replacement of the nozzle
3
as well as any work done within the radius
of the water jet shall be carried out only
after the stop valve on the water line has
been shut-off.
Section 45 hydraulicking

9. RULE 441:
The supply of water to the monitoring device
shall be shut-off at each pause in operation,
and the nozzle of the jet fixed in a position
safe for all the persons working around it.
Section 45 hydraulicking

10. RULE 442:
The belts at the joints in a pipeline
shall never be tightened while pressure is on.
Section 45 hydraulicking

11. RULE 443:
It shall be prohibited to leave an operating
hydraulic monitor without control or to place
the hands, or any other part of the body,
and object in contact with jet stream.
Section 45 hydraulicking
Powerful Force of Water
One description points out that a strong man
could not swing a crowbar through a six-inch
Monitor stream, yet another commented on
the striking phenomenon of a fifty-pound
boulder riding the crest of a jet with the power
of a cannonball. Documented evidence recalls
that men were killed by the force of the water
from 200 feet away.
The Monitors operated twenty-fours a
day with the mines illuminated by
high-intensity lighting or locomotive headlights.
The amount of water needed was enormous. At
the North Bloomfield mine, sixty million gallons
of water was used daily. Thomas Bell, the
president of the company, estimated in 1876
that the hydraulic mine would consume 16
billion gallons of water in that year alone.

12. RULE 444:
No water supply pump or tailings
pump shall be started
until the chief operator of the
hydraulic installation gives the
order, after first sounding the
start-up warning signals.
Section 45 hydraulicking

13. RULE 445:
Each high pressure hydraulic installation
shall have a stop valve in its main water supply line
at a distance not greater than fifty (50) meters from the monitor.
Section 45 hydraulicking

14. RULE 446:
To ensure that hydraulic installation will not burst under the pressure of
the water, the installation shall be subjected to a preliminary *pressure
test prior to commissioning. During operation, the pressure of the water
shall be constantly checked. Each hydraulic monitor shall be provided
with pressure gauge.
*hydrostatic test
commissioning is the authorization for an event to commence
Section 45 hydraulicking

15. RULE 447:
Test pressure to which hydraulic installations
are subjected prior to commissioning shall
exceed the normal operating pressure by thirty
(30) percent for the piping and eighty (80)
percent for the water supply pumps and
tailings pump, but never less than five (5)
atmospheres.
Section 45 hydraulicking

16. RULE 448:
It shall be prohibited to come close
to the foot of a steep face
or walk along the top edge of a working face.
Section 45 hydraulicking

17. RULE 449:
Distance from the hydraulic monitor to the face
shall not be less than the height of the face.
When working a *dense ground liable
to cause falls of large lumps, distance shall be
at least 1.2 times the height of the face.
*dense means compact
Section 45 hydraulicking

18. RULE 450:
When working a face from the upwards,
overhang that starts to develop in the ground
shall be cut down in time with the water jet.
Section 45 hydraulicking

19. RULE 451:
Large rocks and boulders exposed as the
supporting ground is washed away
shall be carefully and gradually
washed down the slope.
Section 45 hydraulicking

20. RULE 452:
Movement over water-deposited
banks shall be prohibited
until compactness and strength of
the ground has been confirmed
by thorough checking.
Section 45 hydraulicking

21. RULE 453:
Electric power shall be supplied to a floating dredge
pump installations by means of a trailing cable laid
on separate floats or on the floats serving as
support to the pulp line. The floats shall:
a. not overturn or sink when four (4) workmen
stand on them at a time;
b. be provided with footwalks on both sides
and fitted with hand rails at least 1m
c. be illuminated during the hours of darkness.
Section 45 hydraulicking