Dam and waterside retaining embankment delivery · Data Quality Requirements

Data Quality Requirements

requirement_id	Applies to	Requirement	Evidence
identity_scope	reference entity and routes	Require site, actual purpose, geometry/datum, hydraulic/retaining conditions, route, complete component schedule and signed acceptance; comparison needs compatible functions and interfaces.	cp_handover; as-built survey
source_units	all measurements and identities	Maintain material states and actual public reference properties/unit groups; validate each supplier geography/voltage/route/gate and Chinese public name. No generic cement strength, sand grade, fuel density or life.	certificates, calibration, actual supplier/gate evidence
coverage	full construction period	Include all selected work packages, subcontractors, tests, rework, temporary installation/use/removal, site/borrow production, stocks and actual exports. Identify absent versus not measured; quantify uncertainty and missing upstream links.	work-package reconciliation; quantity/water balances
review_limits	construction and environmental interpretation	Historical sources are qualitative route evidence only. Actual specifications and current competent acceptance records govern this project. LCA checks do not certify dam safety; unresolved identities, shared-asset denominators and unquantified land/noise/ecology pathways remain declared limitations.	original sources and independent methodology review

9. Validation Rules

rule_id	applies_to	rule	source_ids
complete_reference	declared dataset	One accepted entity output equals the declared reference product name and 1 item, with actual site, surveyed geometry, route, hydraulic/retaining purpose and complete permanent interfaces. No cost-, average-mass-, lifetime- or energy-output substitute.	un-cpc-dams-2025
inventory_unit_gate	declared dataset	Each selected exchange is one physical/chemical flow with its correct type, material state, direction and unit; verified identities require exact primary property and supplier/route/compartment fit. Treat non-applicable with evidence, never aggregate labels or silent omission.	usace-concrete-civil-works-1994
quantities_and_shares	declared dataset	Reconcile each route material/stock/reject ledger, fill geometry and moisture/density measurements, energy and water balances, real transport legs and serialized reusable shares. Unknown H, unproved conversion or inconsistent reference denominator makes the dataset incomplete and requires review.	usace-embankment-dams-2004
releases_and_fates	declared dataset	Verify actual fuel origin and measured species/size/phase/compartment. Captured effluent and sludge cannot masquerade as pure water. Distinguish construction removal from later demolition, and unknown release from zero. Missing required measurements or identities remain inconclusive; do not claim full lifecycle, safety or methodological approval.	epa-concrete-washout-2012

10. Published Dataset Profile

Field	Value
dataset_role	foreground_dataset
downstream_use	secondary_dataset; background_dataset
allowed_use	Construction handover comparison of functionally compatible dam entities at compatible sites/routes/interfaces; verified linked construction-stage input for later water-service/generation models
excluded_use	Full-life storage/generation factor; generic per-kg/metre/capacity dam burden; default reservoir emissions; safety, current compliance or methodology approval
required_metadata	Complete reference qualifiers; actual structural route/geometry; physical quantities/material states; site/time/supply gates; process/component interfaces; measurement/protocols; upstream links; lifecycle stages
required_quality_disclosure	Coverage by actual route, errors/uncertainty; identity gaps, unmeasured releases, unquantified land/noise/ecology, unknown asset H and missing upstream stages; acceptance records do not imply LCA approval
update_trigger	Actual scope/type/geometry/material-source/construction-period or measurement correction; changed component/burden interfaces, identities or quality evidence

11. Data Sources

Source id	Type	Reference	Used for
un-cpc-dams-2025	official_guidance	UNSD, CPC Version 3.0 Explanatory Notes, 30 June 2025, printed/PDF p. 280, 53233 and adjacent 53232/53234. https://unstats.un.org/unsd/classifications/Econ/Download/In%20Text/CPC_Ver_3.0_Exp_Notes_30Jun2025.pdf	Entity/category boundary; no quantitative inventory evidence.
usace-embankment-dams-2004	official_guidance	USACE EM 1110-2-2300, General Design and Construction Considerations for Earth and Rock-Fill Dams, 30 July 2004; §§5-1, 6-1–6-3, 9-2, 9-10; PDF pp.35–36,39,63,68; printed 5-1–5-2,6-1,9-1,9-6. https://www.publications.usace.army.mil/Portals/76/Publications/EngineerManuals/EM_1110-2-2300.pdf?ver=2014-04-07-145941-947	Historical documented foundation, zoned fill, seepage and field-control/as-constructed practices; no design values or current approval generalized.
usace-concrete-civil-works-1994	official_guidance	USACE EM 1110-2-2000, Standard Practice for Concrete for Civil Works Structures, 1 February 1994, publisher file includes Change 2 of 31 March 2001; §§7-6–7-8,9-1,9-4; PDF pp.68,70,80,88; printed 7-6,7-8,9-1,9-9. https://www.publications.usace.army.mil/Portals/76/Publications/EngineerManuals/EM_1110-2-2000.pdf	Historical conventional hydraulic concrete preparation, vibration/curing and quality verification; excludes RCC, repair and shotcrete. No recipe/temperature/strength thresholds adopted.
usace-rcc-dams-2000	official_guidance	USACE EM 1110-2-2006, Roller-Compacted Concrete, 15 January 2000; §§6-1–6-4,6-8; PDF pp.46,48,50,54; printed 6-1,6-3,6-5,6-9. https://www.publications.usace.army.mil/Portals/76/Publications/EngineerManuals/EM_1110-2-2006.pdf?ver=2013-09-04-070814-530	Historical RCC dam batching, transport, spreading/compaction and joint/waterstop practices; no numerical lift/recipe/productivity adopted.
cedd-seawalls-2026	official_guidance	Hong Kong CEDD, Port Works Design Manual Part 4, Guide to Design of Seawalls and Breakwaters, April 2026 e-version; §§2.3.1–2.3.5,4.5.1–4.5.2, PDF pp.15–16,27, printed pp.13–14,25. https://www.cedd.gov.hk/filemanager/eng/content_89/p4_combined.pdf	Qualitative actual retaining-bank, block/caisson, rock armour, seabed dredging/replacement and conditional foundation-treatment operations only; harbour wave-protection/berthing needs separate category review. No universal HK specification, fuel grade, emission factor or lifetime.
epa-concrete-washout-2012	official_guidance	US EPA, Stormwater Best Management Practice: Concrete Washout, EPA 833-F-11-006, February 2012, pp.1–2. https://www.epa.gov/sites/default/files/2015-11/documents/concretewashout_0.pdf	Historical process description supports water/slurry/solids containment and actual treatment/reuse interface; no assumed chemistry, pH threshold, recycling percentage or approval.
ipcc-flooded-land-2019	official_guidance	IPCC, 2019 Refinement to the 2006 IPCC Guidelines for National Greenhouse Gas Inventories, Volume 4 Chapter 7 Wetlands, §7.3, Table 7.7 and origin/pathway distinctions, PDF pp.6–7 / printed 7.6–7.7. https://www.ipcc-nggip.iges.or.jp/public/2019rf/pdf/4_Volume4/19R_V4_Ch07_Wetlands.pdf	Conditional gas origin/pathway and baseline/attribution review for actual pre-acceptance inundation only; national annual defaults and 20-year categories are not applied directly to this construction event, and establish neither lifetime nor inevitable emissions.

Historical documents support documented operations and collection structure, not current local mandatory requirements. All mixtures, physical quantities, energy, losses, geometry, hydraulic conditions, life/reuse denominators and emission parameters require actual project evidence; this PCR supplies no default quantitative ranges.