| Step | Potential Hazard | Control |
|---|---|---|
| Assess work area | Traffic exposure, overhead hazards, utility covers, soft shoulders | Conduct walk through; identify obstacles; mark utilities; set up MUTCD compliant work zone; assign lookout |
| Inspect milling machine | Worn cutting teeth, hydraulic leaks, faulty conveyor, inoperative alarms or lights | Perform pre shift inspection; verify drum rotation, conveyor alignment, water spray system, backup alarm, and beacons |
| Don required PPE | Flying debris, loud noise, dust inhalation | Wear hard hat, high visibility vest, gloves, steel toe boots, and respirator if dust is present |
| Position machine at start point | Backing hazards, blind spots, misalignment | Use spotter; approach cut gradually; keep machine aligned with work path |
| Coordinate with dump trucks | Struck by loader conveyor, truck backing, miscommunication | Use radios or hand signals; ensure truck is properly positioned; maintain exclusion zone under conveyor |
| Start milling drum and conveyor | Flying debris, sudden machine movement | Keep personnel away from drum; engage systems slowly; verify water spray is active to control dust |
| Begin milling operation | Flying asphalt chunks, machine drift, catching utility covers, uneven roadway | Maintain slow and steady pace; keep cutter head level; avoid sudden direction changes; raise drum for obstacles or manholes |
| Manage conveyor discharge | Material spillage, load overflow, contact with truck | Keep trucks centered under conveyor; avoid swinging conveyor over workers; stop conveyor if truck must reposition |
| Monitor depth and cut quality | Uneven milling, drum strike, excessive material removal | Adjust depth control gradually; maintain communication with ground crew checking cut quality |
| Stay aware of ground crew | Crew entering blind spots or near drum | Establish exclusion zone; ground crew must stay visible; operator stops immediately if crew enters hazard area |
| Handle dust and debris | Reduced visibility, respiratory hazards | Maintain water spray; reduce speed if dust increases; pause operations if visibility becomes unsafe |
| Shut down machine | Hot components, unintentional movement | Lower drum; disengage hydraulics; allow drum to stop fully before approaching |
| Perform post operation inspection | Hot surfaces, sharp cutting teeth | Allow components to cool; inspect cutting teeth, belts, hoses, and guards; clear debris only when drums are stationary |
| Clean work area | Loose debris creating hazards for motorists or paving crew | Remove loose millings; ensure roadway is broomed or vacuumed before paving |
| Remove traffic control | Exposure to live traffic during takedown | Remove cones and signs in reverse order; maintain lookout; wear PPE until area is clear |
Hard hat
Safety glasses or face shield
High visibility vest or jacket (Class 3 recommended)
Hearing protection
Steel toe boots
Cut resistant gloves
Long pants and long sleeves
Respiratory protection in dusty environments
Always have a complete, well-stocked first aid kit available.
JSA Category: Heavy Equipment Operations
* The steps, hazards, and controls displayed above may be incomplete or not suit your department's needs. All job safety analyses should be a completed with frontline worker input to ensure that each potential hazard is identified and mitigated.
Please read about The Essentials Elements of a Solid Job Safety Anaylsis here.
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| Step | Potential Hazard | Control |
|---|---|---|
| Assess work area | Traffic exposure, overhead hazards, utility covers, soft shoulders | Conduct walk through; identify obstacles; mark utilities; set up MUTCD compliant work zone; assign lookout |
| Inspect milling machine | Worn cutting teeth, hydraulic leaks, faulty conveyor, inoperative alarms or lights | Perform pre shift inspection; verify drum rotation, conveyor alignment, water spray system, backup alarm, and beacons |
| Don required PPE | Flying debris, loud noise, dust inhalation | Wear hard hat, high visibility vest, gloves, steel toe boots, and respirator if dust is present |
| Position machine at start point | Backing hazards, blind spots, misalignment | Use spotter; approach cut gradually; keep machine aligned with work path |
| Coordinate with dump trucks | Struck by loader conveyor, truck backing, miscommunication | Use radios or hand signals; ensure truck is properly positioned; maintain exclusion zone under conveyor |
| Start milling drum and conveyor | Flying debris, sudden machine movement | Keep personnel away from drum; engage systems slowly; verify water spray is active to control dust |
| Begin milling operation | Flying asphalt chunks, machine drift, catching utility covers, uneven roadway | Maintain slow and steady pace; keep cutter head level; avoid sudden direction changes; raise drum for obstacles or manholes |
| Manage conveyor discharge | Material spillage, load overflow, contact with truck | Keep trucks centered under conveyor; avoid swinging conveyor over workers; stop conveyor if truck must reposition |
| Monitor depth and cut quality | Uneven milling, drum strike, excessive material removal | Adjust depth control gradually; maintain communication with ground crew checking cut quality |
| Stay aware of ground crew | Crew entering blind spots or near drum | Establish exclusion zone; ground crew must stay visible; operator stops immediately if crew enters hazard area |
| Handle dust and debris | Reduced visibility, respiratory hazards | Maintain water spray; reduce speed if dust increases; pause operations if visibility becomes unsafe |
| Shut down machine | Hot components, unintentional movement | Lower drum; disengage hydraulics; allow drum to stop fully before approaching |
| Perform post operation inspection | Hot surfaces, sharp cutting teeth | Allow components to cool; inspect cutting teeth, belts, hoses, and guards; clear debris only when drums are stationary |
| Clean work area | Loose debris creating hazards for motorists or paving crew | Remove loose millings; ensure roadway is broomed or vacuumed before paving |
| Remove traffic control | Exposure to live traffic during takedown | Remove cones and signs in reverse order; maintain lookout; wear PPE until area is clear |
Hard hat
Safety glasses or face shield
High visibility vest or jacket (Class 3 recommended)
Hearing protection
Steel toe boots
Cut resistant gloves
Long pants and long sleeves
Respiratory protection in dusty environments