Chapter 10 — Installation, Operation, and Maintenance¶
10.1 Reliability is designed in¶
A monitoring program is only as good as the data it actually collects. Most failures of surveillance are not sensor errors but installation and maintenance failures. The Dunnicliff "recipe for reliability" applies directly to tailings facilities.
10.2 Installation essentials¶
- Protect against the environment — tailings sites are corrosive, sunny, dusty, and sometimes frozen. Use UV-stable cable, sealed connectors, and rodent/cable protection.
- Proper saturation and grouting of piezometers and inclinometer casing (Dunnicliff Ch. 9, 17).
- Stable monuments anchored below the active zone, with clear referencing.
- Installation records — depth, stratum, orientation, date, as-built — kept permanently.
10.3 Operation¶
- Establish baseline readings after installation and settlement.
- Set reading frequencies by parameter and risk stage (Chapter 11).
- Use redundant manual backup where automation is the primary method, so a telemetry failure does not create a gap.
10.4 Maintenance¶
- Scheduled checks: cable continuity, battery/Power, sensor zero, datalogger clock, telemetry heartbeat.
- Cold-weather plans: heating, burial depth, or seasonal shutdown with documented fallback.
- Spare parts and tools on site, with trained personnel.
- Corrective action when an instrument drifts, fails, or is destroyed by operations (e.g., buried by deposition).
10.5 Surviving the operating environment¶
Tailings operations are dynamic: deposition moves, equipment traverses, and instruments get buried or struck. The plan must anticipate instrument loss and replacement as a normal cost of monitoring a living facility.
Document everything
An instrument without a readable, permanent installation record and a known baseline is nearly worthless for interpretation. Treat records as first-class deliverables.
10.6 Key takeaways¶
- Most surveillance failures are installation/maintenance failures, not sensor errors.
- Protect instruments from a harsh, dynamic operating environment.
- Keep baselines, frequencies, and permanent records.
- Plan for instrument loss and replacement as normal.