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Mining AI agent · Tailings governance

Tailings Storage Facility Governance AI Agent

Assemble the governance record a facility already owes: the engineer of record file, readings set against their triggers, the review cycle and the deviations — then hold it for the people who sign.

4–6 weeksTypical delivery
Your stackDeployment
Assembly onlyNamed signers
Agent CareAfter launch

What this agent does

Assembles the record, not the review

In
01

An instrument reports, and the reading is pulled from supported piezometer, survey, inspection and SCADA sources.

02

A reading is set against the trigger level current on the day it was taken, not the level current today.

Reason
03

A review falls due, and the interval is the stricter of the cycles that apply to that facility, not one global number.

04

A raise is completed, and the record is rebuilt against the as-built survey rather than the design geometry.

05

A change is approved, and it joins the deviation record the deviance accountability report is drawn from.

Decide
06

An OMS review date passes, and the assumptions inside the EPRP are checked as well as the date on its cover.

07

A disclosure round opens, and each per-facility field is traced back to the engineer of record file behind it.

Out
08

A pack is retained as a dated version, beside the readings behind it and what each named signer was shown.

09

A write action runs only inside the approval boundaries agreed during implementation.

Product statement

The agent assembles and keeps the record current; the engineer of record reviews and signs, and the accountable executive approves the design criteria.

Example workflow

One facility, reading to review

AgentHuman
1Readings receivedPiezometers, survey, inspection reports and SCADA history
2Record assembledTriggers, review dates, deviations and document currency, each with its named source
3Pack draftedSurveillance record, deviation log, open items and confidence
4Controls appliedTrigger tests, review-cycle checks, deviation completeness and confidence threshold
No human action required

Stages 1 to 4 run unaided, and nothing is certified at any of them — the agent is assembling a record, and the engineer lane opens at the confidence gate.

5DecisionBranches at the confidence threshold
High confidence

Goes to the engineer of record.

Low confidence

Adds a site read first.

Engineer review

The pack is held with its readings, its open items and the confidence.

Approve · Amend · Send to site review
Approved — released to the signers
6Governance record updatedOnly where write access and approval policy allow it
7Outcome evaluatedAmendment distance, open-item outcomes, review findings and post-disclosure corrections
Amendments

Every engineer amendment is counted in the evaluation.

What should not run autonomously

Human approval stays in control

Outside the boundary — human approval required8 items
Certifying dam safety — the engineer of record.
Setting or revising a trigger level.
Clearing a TARP alarm, or standing one down.
Approving design criteria — the accountable executive.
Automation boundaryAgent acts unaided
Assemble the surveillance record against the triggers on file.
Track the review cycle the consequence classification sets.
Name deviations from the design basis report, and date them.
Check the OMS manual and the EPRP for currency, and hold the pack.
Writes run only inside the boundaries agreed at implementation, and never ahead of a signature.
Determining the consequence classification.
Predicting whether a facility will fail.
Notifying a regulator or a chief inspector.
Changes to trigger, review or approval rules.

Example output

One governance item, annotated

Everything the agent assembles is attached to the document it was drawn from.

Governance record output · single itemIllustrative example
Facility
Governance item
Time since review
Source of record
Confidence
Signer of record
Very high consequence
OMS manual annual review, read against its own date
11 months
OMS manual on file
86%
Engineer of record, named on the file
As receivedTaken from the OMS manual and the review log — nothing on this side is written by the agent.
Source facts used OMS manual, dated Annual review log Current DSR record
Why this is openThe annual review under GISTM 2020 Requirement 6.4 has a date, and this one has passed it.
ActionApproveAmendSend to site review
What the score decidesBelow the configured threshold the item picks up a site read before the engineer sees it.

Value

Where AI adds value

The same four claims, placed at the point in the workflow where each one applies.

Where the value landsValue 01 – 04
Every facilityFrom the surveillance record
03Assembly

Read the data against the triggers

Readings are set beside the trigger levels already on file; the response stays with the TARP owner named in it.

01Approved path

The engineer of record signs

Design responsibility sits with the engineer of record — GISTM 2020, Requirement 10.4. Assembling evidence is not the review.

02Human review

Independence is the instrument

A dam safety review is independent by design — GISTM 2020, Requirement 10.5. The agent prepares what a reviewer reads and replaces neither.

04Build an evidence trail

The reading, the trigger it crossed and the engineer who reviewed stay on the surveillance file.

Integrations

Typical integrations

Five system groups connect to the same agent. Which of them are in scope is decided in discovery.

Geotechnical monitoringPiezometers · inclinometers
Vibrating-wire loggers
Survey and imageryDrone and LiDAR survey
InSAR deformation feeds
Operational dataSCADA · historian
Deposition and water balance

Agent

Tailings governance record

Reads the record
Assembles the pack
Holds for review

Documents and disclosureOMS · EPRP · DBR files
Disclosure and ESG systems
Observability & evaluationOpenTelemetry · Langfuse
Supported monitoring/evaluation sources

Integration availability depends on the client's existing systems and API access.

Agent controls

Six layers between the model and the file

Six layers, outermost first. What the whole set still lets through is drawn in the map below.

L6 · Outermost — last line of defenceInward → L1 · closest to the model
L6Rollback / safe modePull back to record assembly when evaluation or production signals degrade.Roll back
L5Version monitoringTrack model, prompt, trigger-rule and facility-configuration changes.Track
L4TraceabilityRecord the readings, the triggers, the open items and the approval time.Record
L3Engineer approvalHold the pack for the named engineer of record; it governs release, not whether the facility is safe.Gate
L2Policy guardrailsTest the pack against the trigger and review-cycle rules; a failure returns the pack.Restrict
L1Confidence thresholdsRoute low-confidence items to a site read before the engineer sees them.Require review
Model corePack assembled — surveillance record, deviation log, open items and confidence
L1 – L2Test whether the pack may stand
L3Puts the release in the hands of an engineer
L4 – L5Keep the reading and the trigger behind it
L6Holds the dam file at unreviewed when signals degrade

How Nestack evaluates it

Evaluate the assembly workflow — not only the finished pack.

Coverage runs the whole depth of the workflow, and every layer is cut by slice.

Surface — the record the engineer reads
Depth of coverage ▼
E1Final-output evaluationDid every item trace to the reading or document behind it?
E2Step-level evaluationDid the agent use the right triggers, intervals and facility configuration?
E3Tool evaluationDid it read and write the correct facility and the correct period?
E4Confidence calibrationDo low-confidence items actually attract more engineer amendments?
E5Slice evaluationHow does performance change across specific facility classes?
E6Business outcomeHow many items were amended, or corrected after the disclosure went out?
Floor — the outcome the operator answers for

Failure modes

Where each failure originates in the agent

Seven failure modes, each set at the stage where it first arises.

Agent lifecycleDirection of processing →
01 · Retrieval1 mode
DG-03

As-built never ingested

The pack is assembled against design geometry.

Stage gathersReadings, documents, triggers and review dates
02 · Reasoning2 modes
DG-04

Superseded trigger level

A revised level is not applied back across the year.

DG-06

Deviations added, not assessed

Each change passed alone, and none was read together.

Stage proposesSurveillance pack, deviation log and confidence
03 · Tool / write2 modes
DG-02

Old review interval carried

A reclassified facility keeps its former cycle.

DG-05

Date received, not conducted

The review date published is the date it arrived.

Stage writesOnly where write access and approval policy allow it
04 · Output1 mode
DG-01

EPRP checked by date only

Its inundation assumption is the superseded one.

Stage returnsThe governance record the engineer of record reads
05 · Change / Version1 mode
DG-07

Silent trigger drift

A model or rule change alters what reads as an exceedance.

Stage tracksModel, prompt, trigger rules and facility config
Sev-1 · a wrong pack reaches a signature Sev-2 · a wrong date reaches the disclosure Sev-3 · source degrades, item goes to review

Affected slices

A clean portfolio total can hide one facility class

A portfolio-wide trigger-response rate can read as healthy while a few facility classes carry most of the returned items. Nestack reports the return rate by facility class, not only in total.

Slice performance — reported separately, not only in aggregateIllustrative example
SliceFailure rateLift Lift vs. thresholdStatus
Extreme-consequence facilities9.6%3.7× Review
Facilities raised in the year7.4%2.8× Review
Facilities moving to closure4.3%1.7× Watch
Stable, unraised facilities1.9%0.7× Normal
Bar: return-rate lift vs. stable-facility baseline · scale 0–4.0× · tick marks the 2.0× review threshold 2 of 4 slices over threshold

Evidence-linked improvement

No cycle closes without a new test

A cycle closes when the missed trigger is a regression case. That suite is what the next surveillance pack assembled is measured against.

Improvement cycle · five stagesSwitchback — the path turns at Improve and returns at Learn
01Detect

Return rate rises for one facility class.

02Diagnose

The reading that crossed a trigger on a Friday and was reviewed on a Tuesday is read back until the cause narrows to one.

03Improve

The change ships with a number, and the triggers that forced it travel beside it.

04Verify

Nothing releases while one touched surveillance case is still red.

05Learn

It is kept for good, and the trigger rules are amended in the same commit.

Learn → DetectThe return edge. The next cycle runs against a suite one case longer.

Typical build scope

Twelve workstreams across six weeks

The build scope read against the delivery timeline. Week structure follows the six-week plan — discovery, sources, governance workflow, evaluation, integration, then production validation and handover.

Workstream Week 1Week 2Week 3Week 4Week 5Week 6
01Governance workflow discovery and boundary mapping.
02Instrumentation and document assessment.
03Trigger, review-cycle and deviation rule mapping.
04Reading ingestion and reconciliation.
05Pack assembly and source binding.
06Confidence scoring and exception routing.
07Engineer review workflow.
08Instrumentation and document integration.
09Trigger and surveillance cases.
10Guardrails and review controls.
11Surveillance-trail instrumentation.
12Deployment, documentation and Agent Care handover.
12 workstreams · 6 weeks · bar shows the weeks a workstream is active — several run in parallel Final scope and sequence confirmed in discovery

Engagement tiers

What each tier includes

Rows are the capabilities named in each tier's scope. Higher tiers include everything below them.

Capability✓ in scope · — not at this tier PilotOne facility, one cycle ProductionProduction monitoring systems AdvancedMultiple sites / jurisdictions
Introduced at Pilot
Governance record and reconciliation
Engineer-of-record approval
Trigger-coverage baseline
Introduced at Production
Reporting by facility
Exception workflow in your systems
Approved write-back
Instrumentation integration
Introduced at Advanced
Multi-jurisdiction cycle rules
Multi-stage governance approvals
High facility count
Multi-facility review controls
Build price From $5,000 From $8,000 Custom quote
Final build priceConfirmed after discovery based on integrations, workflow complexity, facility count, approval controls and deployment requirements.
Separate from buildBuild pricing is separate from recurring Agent Care, which covers managed monitoring, evaluations, incidents and verified improvements after launch.

What we need from you

What you bring, and what we build with it

Each input maps to a piece of build scope and a week in the delivery timeline.

You bringWe build with it
01Your facility list and consequence classes Trigger, review-cycle and deviation rule mappingWeek 1
02Representative prior annual packs Reading ingestion, reconciliation and the assembly baselineWeek 2
03Your design basis reports and OMS manuals Governance-record mapping and automation-boundary definitionWeek 1
04Access to relevant APIs, feeds or exports Instrumentation and document assessment, then integration setupWeek 2
05Surveillance packs you would not want read back Trigger cases and failure-mode testingWeek 4
06What no dam-safety review may omit Confidence scoring, exception routing, guardrails and review controlsWeek 3
07Named engineers of record to review the pack Engineer review workflow, then pilot and production validationWeeks 5–6
Nothing else is required Deployment, documentation and Agent Care handover are ours.

Delivery timeline

Four phases across six weeks

The bands sit on the weeks each phase genuinely fills, which is why the fifth of them carries two.

Phase W1W2W3W4W5W6
Discovery W1
Build W2 – W3
Evaluate W4 – W5
Pilot & Launch W5 – W6
Week focus W1Governance workflow discovery, rule mapping and the automation boundary W2Source integration and the reconciliation baseline W3Assembly workflow, confidence logic and review controls W4Evaluation suite, trigger checks and failure-mode testing W5Instrumentation integration, a pilot facility and targeted corrections W6One surveillance cycle run under the engineer of record, then Agent Care handover
Reading the bandA bar spans only the weeks its own work is named in. The week 5 overlap is real, not padding.
At the end of W6Validation closes on live facilities, and Agent Care picks up the monitoring.
DurationSix-week plan shown · typical delivery 4–6 weeks depending on scope confirmed in discovery.

Next step · Mining AI agent

Build the governance record before the next review falls due.

Show us your facilities, your trigger levels and who signs. If your evidence was built to carry a self-assessment, then it has not yet been asked the question a third-party assessor asks at every criterion — which record shows this.

Nestack Agents · Tailings storage facility governanceAGT-MN-09 · Agent Care available after launch