Coal combustion residual impoundments — Thermal
Measurement answer
What this metric measures
Reports the number of coal combustion residual impoundments associated with thermal operations, disaggregated by hazard potential classification and structural integrity assessment.
Specification
Metric specification
- Result format
- Structured table
- Unit
- number of impoundments — source-defined reporting unit
- Reporting basis
- Reporting period
- Aggregation
- Sum impoundment counts across mutually exclusive hazard-potential-classification and structural-integrity-assessment combinations, while retaining the disaggregated rows.
- Pillar
- Environmental
- Topic
- Pollution and waste containment
- Controlled domain
- Pollution
- Entity type
- Metric
Reporting boundary
Coal combustion residual impoundments associated with thermal operations.
Verified source occurrences
Framework coverage
This is one canonical metric. The bindings below show every verified framework occurrence without creating duplicate metric pages. Edition, disclosure, role, and relationship remain source-specific.
- Adopting DisclosureSource evidence
TNFD sector guidance
- Publisher
- Taskforce on Nature-related Financial Disclosures
- Edition
- Final English sector guidance collection through August 2026 (17 documents)
- Requirement
- Not Specified
- Relationship
- Defines Disclosure
- Mapping outcome
- Direct Evidence
- Source locator
- p.68, Section 3.2, Table 13, EP.C2.1
- Adopting DisclosureEP.C2.1
TNFD sector guidance
- Publisher
- Taskforce on Nature-related Financial Disclosures
- Edition
- Version 1.0, June 2024
- Requirement
- Conditional
- Relationship
- Maps Source Identity
- Mapping outcome
- Published
- Source locator
- p.68, Section 3.2, Table 13, EP.C2.1
Value structure
Dimensions and units
- Unit
- number of impoundments — source-defined reporting unit
- Reporting basis
- Reporting period
Unit meaning: Values use number of impoundments under the disclosed TNFD sector-guidance method, reporting period and boundary.
Table fields and units
- Hazard potential classification
- Structural integrity assessment
- Number of coal combustion residual impoundments
Published dimensions
- Hazard potential classification
- Structural integrity assessment
Calculation method
Formula information
- Status
- Specified
- Formula type
- Sum
Formula
Total coal combustion residual impoundments = Σ N_h,s, where h is hazard potential classification and s is structural integrity assessment.Apply the source-defined TNFD sector-guidance method within the stated reporting boundary. The source supplies a discrete, independently reportable count metric, its population, unit, and two required dimensions. The shortlisted coal-production, coal-combustion-product, and noncompliance metrics do not share this impoundment population, dimensional structure, or outcome construct.
Variables
| Symbol | Variable | Definition | Unit |
|---|---|---|---|
N_h,s | Impoundment count | Number of coal combustion residual impoundments in a specified hazard-potential-classification and structural-integrity-assessment combination. | number of impoundments |
Verified sources
Evidence and status sources
Sustopedia checked each record-specific claim directly against primary publisher material. Labels distinguish current measurement authority from future compatibility and corroborative, legal, edition, or method status context. Corroborative evidence can support a stated limitation but cannot establish the core measurement by itself.
Measurement evidence
- Measurement evidenceChecked 30 August 2026
TNFD additional sector guidance collection
- Publisher
- Taskforce on Nature-related Financial Disclosures
- Edition
- Final English sector guidance collection through August 2026 (17 documents)
- Locator
- p.68, Section 3.2, Table 13, EP.C2.1
Supports: The official TNFD sector guidance supports the identity, boundary and method basis of “Coal combustion residual impoundments — Thermal”.
Open official source
Use with context
Interpretation boundaries
Method disclosures required
Source-edition basis: TNFD sector guidance, Final English sector guidance collection through August 2026 (17 documents).
- State the hazard potential classification used for each impoundment.
- State the structural integrity assessment status or classification used for each impoundment.
- Describe the basis used to identify coal combustion residual impoundments within thermal operations.
Record-specific limitations
- The metric is a count of impoundments and does not itself quantify ash volume, contaminant releases, failure probability, or environmental impacts.
- Comparability depends on the hazard-potential classifications and structural-integrity assessment basis applied to each impoundment.
Interpret this metric with the stated reporting boundary, period convention, value shape, and unit. Results prepared with different boundaries or conventions may not be directly comparable.
Measurement evidence supports the core record-specific claims described above. Corroborative evidence can support limitations, while compatibility and status sources provide their separately labelled context. None of these cards by itself determines an organisation's legal applicability, filing readiness, assurance status, or compliance conclusion.