Division of Division of ReclamationReclamation

December 4, 2006December 4, 2006

Signs and MarkersSigns and Markers

Place at all entrances to the permit area from Place at all entrances to the permit area from public roads conspicuous signs which state public roads conspicuous signs which state "Warning Explosives in Use", which clearly "Warning Explosives in Use", which clearly explain the blast warning and all clear signals explain the blast warning and all clear signals that are in use, and which explain the marking of that are in use, and which explain the marking of blasting areas and charged holes within the blasting areas and charged holes within the permit area.permit area.

Conspicuously display signs reading "Blasting Conspicuously display signs reading "Blasting Area" along the edge of any blasting area that Area" along the edge of any blasting area that comes within 100 feet of any public road right of comes within 100 feet of any public road right of way, and at the point where any other road way, and at the point where any other road provides access to the blasting area.provides access to the blasting area.

Signs and MarkersSigns and Markers

Blasting AreaBlasting Area is the area near a blast is the area near a blast within the influence of flying rock within the influence of flying rock missiles, or concussion.missiles, or concussion.

Post “Blasting Area” signs when:Post “Blasting Area” signs when:

- blasting area is within 100 feet of - blasting area is within 100 feet of public roadpublic road

Signs and MarkersSigns and Markers

Post “Blasting Area” signs when:Post “Blasting Area” signs when:

- points of access that lead to - points of access that lead to blasting area (i.e. farm lanes)blasting area (i.e. farm lanes)

- pass on way to pit- pass on way to pit

Signs and MarkersSigns and Markers

Conspicuously flag the immediate Conspicuously flag the immediate vicinity of charged holes.vicinity of charged holes.

- main mine ID sign - main mine ID sign

- orange safety cones, sign, - orange safety cones, sign, barricades, flagging, etc.barricades, flagging, etc.

- place at all entrances to the blast - place at all entrances to the blast pattern; pattern;

- not just for DOR- not just for DOR

Blast Area SecurityBlast Area Security

Access to an area possibly subject to Access to an area possibly subject to flyrock from blasting shall be regulated to flyrock from blasting shall be regulated to protect the public and livestock.protect the public and livestock.

Access to the blasting area shall be Access to the blasting area shall be controlled until an authorized controlled until an authorized representative of the permittee has representative of the permittee has reasonably determined that:reasonably determined that:- no unusual circumstances exist- no unusual circumstances exist- access to and travel in or through the - access to and travel in or through the area can be safely resumedarea can be safely resumed

Blast Area SecurityBlast Area Security

Be familiar with boundariesBe familiar with boundaries– FlyrockFlyrock

Public roadsPublic roads– BlockBlock– TimeTime– DustDust

Blast Area SecurityBlast Area Security

Warning and all-clear signals of different Warning and all-clear signals of different character or pattern that are audible character or pattern that are audible within a range of one-half (½) mile from within a range of one-half (½) mile from the point of the blast shall be given.the point of the blast shall be given.

- all clear should not be sounded until blast - all clear should not be sounded until blast has been checked and area is determined has been checked and area is determined to be safeto be safe

- equipment should stay out of area- equipment should stay out of area

Blast RecordsBlast Records

DateDate TimeTime Distance to StructuresDistance to Structures

- Coordinates- Coordinates- Maps- Maps- Other structures- Other structures

Pounds detonated per 8 msPounds detonated per 8 ms- Average- Average- What’s in each hole?- What’s in each hole?

Blast RecordsBlast Records

Keep good recordsKeep good records– Hole profileHole profile– Explain (airbags, etc.)Explain (airbags, etc.)

Could go to courtCould go to court

Blast RecordsBlast Records

A record of each blast, including A record of each blast, including seismograph records when obtained, shall seismograph records when obtained, shall be retained by the permittee for at least be retained by the permittee for at least three (3) years and shall be made three (3) years and shall be made available for inspection by the director and available for inspection by the director and the public on request.the public on request.

- seismograph data must be in format - seismograph data must be in format capable of reproductioncapable of reproduction

Blast RecordsBlast Records

Name, certification number, and signature Name, certification number, and signature of the certified blaster conducting the of the certified blaster conducting the blast.blast.

- blaster in charge signs record- blaster in charge signs record

- certified blaster must be on mine site - certified blaster must be on mine site when loading holeswhen loading holes

SeismographsSeismographs

Setup and operationSetup and operation- be familiar- be familiar- consultant- consultant- know how to retrieve data- know how to retrieve data- check regularly – especially when - check regularly – especially when monitoring is requiredmonitoring is required- keep field notes of readings- keep field notes of readings- don’t use it you’ll probably lose it- don’t use it you’ll probably lose it

SeismographsSeismographs

MalfunctionMalfunction Required to monitorRequired to monitor

- what do you put on record?- what do you put on record?- must still demonstrate compliance- must still demonstrate compliance- regression- regression

- call us- call us

ComplianceCompliance

Vibration limits for different structuresVibration limits for different structures

- houses, etc. 1 in/sec- houses, etc. 1 in/sec

- barns, grain bins, etc. 2 in/sec- barns, grain bins, etc. 2 in/sec

- gas/water pipelines, wells, etc. 5 - gas/water pipelines, wells, etc. 5 in/secin/sec

- wooden power poles, buried cables, - wooden power poles, buried cables, etc.etc.

9 in/sec9 in/sec

MonitoringMonitoring

Ground vibrationGround vibration AirblastAirblast

- < trigger level- < trigger level

- no triggers- no triggers

- calibrations- calibrations

HousePit

Barn

House Pit

Barn

HousePit

Barn

GasLine

HousePit

Barn

GasLine

Powerline