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💧 SOP-MIN-009: Tailings and Water Management Inspections

Rule zero: A tailings or water structure failure is a catastrophe. Inspect, record, and escalate early.

FieldDetail
Company / siteRidgeline Copper Operations (fictional sample company)
Document No.SOP-MIN-009
Revision1.0 (approved)
Effective2026-10-06
Next review due2027-10-06 (or after any incident or change)
Applies toTailings and water operators, geotechnical staff, environmental staff and supervisors
OwnerEnvironmental Manager
Approved byMine Manager and Site Safety Manager

1. Purpose

To keep tailings storage facilities, dams, ponds, pipelines and water systems stable and compliant, and to catch early signs of failure or release.

2. Scope

Tailings storage facilities, process water ponds, sumps, pipelines and discharge points.

3. Roles and responsibilities

RoleResponsibilities
Environmental ManagerOwns the inspection program and regulator reporting.
Geotechnical EngineerReviews stability data and sets action triggers.
OperatorsDo the routine inspections and report changes.
Responsible personHolds the accountability for the safety of the facility.

4. Hazards and controls

HazardControl
Dam wall failure or overtoppingFreeboard monitoring, pond level limits, wall inspections
Seepage and pipingPiezometers, seepage monitoring, early detection
Pipeline leaks and spillsPressure and flow monitoring, bunding, leak detection
Contaminated dischargeWater quality sampling, treatment, discharge limits

5. Site-specific parameters

ParameterValue at Ridgeline Copper Mine
Tailings facilityTSF1: 42 m embankment, downstream raise, 1.5 m minimum freeboard
InspectionsDaily operator walk, weekly engineer inspection, annual independent review
Instruments24 piezometers, 6 inclinometers, 12 survey prisms, read weekly (every 24 hours at alert level)
Alert / ActionAlert at freeboard 2.0 m or a piezometer rise of 0.5 m; Action at 1.5 m or a rise of 1.0 m
Pond levelMaximum operating level 3,412.5 m RL
PipelinesPressure and flow monitored; automatic trip on a 10% flow drop
Discharge waterpH 6.5 to 8.5, sampled weekly, reported monthly to the environmental agency

6. Procedure

Routine inspection

  1. Walk the wall, crest, toe and spillways on the set schedule. Record water levels and freeboard.
  2. Look for cracks, slumping, wet spots, seepage, erosion, animal burrows and vegetation changes.
  3. Check pumps, pipelines, valves and flow meters.

Monitoring

  1. Read piezometers, inclinometers, survey points and flow meters and record them.
  2. Compare with trigger levels and report trend changes the same day.

Response

  1. On an alert trigger, increase inspections and tell the Geotechnical Engineer.
  2. On an action trigger, restrict access, lower the pond level and start the emergency plan.
  3. Report to the regulator as required by law and the permit.

7. Stop-work triggers

Stop the job, make the area safe and call the supervisor if any of these happen:

  • Freeboard falls below the minimum
  • New cracks, slumping or muddy seepage appear
  • Monitoring reaches an action trigger
  • A pipeline leaks or a spill occurs

8. Emergency response

  1. Raise the alarm and tell the Incident Controller and Responsible person.
  2. Evacuate people in the inundation zone and stop the discharge.
  3. Start the emergency action plan and notify authorities and downstream communities as planned.

9. Records

  • Inspection and monitoring records
  • Water balance and quality results
  • Regulator reports and emergency drill records

10. Related documents

  • Emergency response (SOP-MIN-007)
  • Ground control (SOP-MIN-003)
  • Job hazard assessment (JHA) template
  • Incident reporting and investigation SOP (SOP-MIN-010)
  • Applicable regulations for your jurisdiction, for example MSHA 30 CFR Parts 56 and 57 in the United States

Controlled document. The current version lives in this library. Printed copies are uncontrolled: check the revision before you use one. Questions or improvements go to the document owner.

11. Revision history

RevDateAuthorChange
1.02026-10-06Site HSE departmentFirst issue, approved for use

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