Long-distance communication and power-line infrastructure delivery · Process: Acceptance, temporary-work removal and delivery (handover)

Process: Acceptance, temporary-work removal and delivery (handover)

Close punch lists and tests, reconcile installed geometry and all component/waste/return records, remove temporary works actually used and complete real reinstatement. Retain dated as-built drawings and signed acceptance covering every declared interface. Energisation, optical commissioning or mechanical/civil acceptance follow the real asset type; acceptance is evidenced, not granted by this PCR. Later maintenance/replacement/repair and demolition are separate dated scenarios with their own inputs, recovered products, wastes and direct releases.

Inputs

Product flows

No separate exchange is declared here. Actual transfers of this type require their own measured atomic rows if present.

Waste flows

No separate exchange is declared here. Actual transfers of this type require their own measured atomic rows if present.

Elementary flows

No separate exchange is declared here. Actual transfers of this type require their own measured atomic rows if present.

Outputs

Product flows

Accepted long-distance communication or power-line infrastructure delivery (reference_line)

One complete uniquely identified accepted construction object, possibly a defined line section or separately accepted transmission transformer station/pylon. Its full declared physical interface and supporting works define the item; not one kg of cable, a construction-service contract or an arbitrary work stage.

• Selected flow: Accepted long-distance communication or power-line infrastructure delivery
• Flow property / unit: Number of items 01846770-4cfe-4a25-8ad9-919d8d378345 / item
• Amount rule: 1 item
• Value mode: Fixed value (fixed_value)
• Specificity: Site-specific (site_specific)
• Normalization basis: per declared reference flow
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_delivery
• Sources: cpc3-explanatory-notes-2025; national-grid-overhead-2025; eirgrid-underground-2026; itu-submarine-g971-2024

Waste flows

No separate exchange is declared here. Actual transfers of this type require their own measured atomic rows if present.

Elementary flows

No separate exchange is declared here. Actual transfers of this type require their own measured atomic rows if present.

7. Allocation and Co-product Handling

rule_id	Applies to	Rule	source_ids
allocation_direct	Tasks and delivered objects	Use direct task/component metering first. If a campaign serves distinct objects, separate their measured quantities; allocate only irreducible shared work by a documented causal physical driver such as actual lift-hours, pulling time, vessel task-hours or serviced work volume. Shares are nonnegative and sum to one over all beneficiaries; explain standby/empty return. Route length alone is not an automatic allocator for dissimilar civil conditions or conductor configurations.	national-grid-overhead-2025; eirgrid-submarine-2022
allocation_reuse	Reusable machinery, formwork and temporary components	Keep one asset identity and manufacture boundary. When manufacture is included, attribute measured same-configuration mass/count multiplied by an evidenced dimensionless project share of total service; retain the public property. Maintain a cross-project/period/reuse ledger whose cumulative manufacture shares never exceed one. Unknown life or total service remains review; do not reset complete manufacture to every project. Site fuel/maintenance activities are separate and never reduced by the manufacture share.
allocation_waste	Scrap, excavated soil and recovered components	Waste export, supplier returns, internal reuse and a qualified recovered product have distinct gates. No automatic avoided-metal, avoided-fill or energy credit is applied. Keep collection/transport/treatment burdens and destination evidence; any separately justified recycling/substitution scenario states actual quality, recovery yield and counterfactual with independent review.	eirgrid-underground-2026; ifc-power-ehs-2007

8. Foreground Data Collection, Calculation, and Quality Rules

Data Collection Protocols

Collection aggregation applies to each stated exchange unit: reconcile receipts, stocks, installed amounts, returns, waste and actual task measurements, then total once for the complete declared accepted object. Each collection record carries its actual process/task ID. Shared ledger protocols are anchored in site_operation and support the branch cards without repeating any amount. A homogeneous batch of N separately identified equivalent accepted objects may divide its measured aggregate by an evidenced positive N only under calc_reference; no heterogeneous average is inferred.

protocol_id	process_id	flow_role	record_type	raw_fields	collection_method	unit	frequency	temporal_coverage	site_scope	aggregation_rule	quality_evidence
cp_delivery	handover	reference_line and delivered geometry	actual measured records	object ID; site/endpoints; as-built chainage/length; cable/circuit/fibre counts; actual dimensions; ratings; component interfaces; acceptance date/tests; retained existing assets; qualifier applicability and absent-branch drawing evidence	Survey/measure actual delivered scope and cross-check signed drawings, test records and handover inventory; no invented mass or design data; apply boundary_qualifiers to standalone station/support fields as well as line sections; absent attributes require evidenced not_applicable, never fabricated geometry	item; m; m2; kV; MVA; fibre count	Each task/load/batch/meter event; delivery close-out	All actual work from baseline to acceptance/restoration; recorded real dates	One declared object and linked actual work sites/voyages; shared beneficiaries explicit	per declared reference flow	survey calibration; signed acceptance and complete interface list
cp_materials	site_operation	each actual purchased component	actual measured records	supplier; batch/model/specification; complete supply scope; received/installed/returned/offcut count/length/volume/mass; moisture; actual density/linear mass; tests; pre-acceptance failed/replaced components; opening/closing reusable stocks; verified transfers	Match design BOM, weighbridge/drum/ticket/meter records and installed survey; separately measure conversion support and embedded materials; native-unit inputs include attributable consumed failures/replacements: gross receipts + opening stock - verified returns/transfers - closing reusable stock; accepted installed configuration and actual waste are separate, without cancelling input manufacture	kg; m; m3; item	Each task/load/batch/meter event; delivery close-out	All actual work from baseline to acceptance/restoration; recorded real dates	One declared object and linked actual work sites/voyages; shared beneficiaries explicit	per declared reference flow	supplier certificates; calibrated weighing/length/volume instruments; batch reconciliation
cp_energy	site_operation	electricity and each actual site fuel	actual measured records	task/equipment ID; geography; supply voltage; meter readings; dates; fuel batch mass/volume; actual density and net heating value; blend/carbon origin; idle time	Submeter each real task or reconcile fuel issue/return/tank stock; metered kWh to MJ and actual measured mass with batch heating value	kWh; MJ; kg; m3; kg/m3; MJ/kg	Each task/load/batch/meter event; delivery close-out	All actual work from baseline to acceptance/restoration; recorded real dates	One declared object and linked actual work sites/voyages; shared beneficiaries explicit	per declared reference flow	meter calibration; fuel certificate; distinct grid/generator/transport interfaces
cp_water	site_operation	supply, abstraction, dewatering and receiving water	actual measured records	source/location; intake/output meters; actual seawater mass; actual salinity/temperature and evidenced density; original volume parcel records; tank stocks; water parcel ID; reuse; treatment/discharge destination; sampling composition; permission	Meter actual separate water parcels and seawater mass, or volume with evidenced density at the same salinity/temperature; unknown density remains review. Reconcile original volume stocks/reuse and returns separately; specific sampled pollutants are separate atomic emissions, not whole wastewater as water	m3; kg seawater; kg/m3 measured density or identified constituent concentration; salinity; temperature	Each task/load/batch/meter event; delivery close-out	All actual work from baseline to acceptance/restoration; recorded real dates	One declared object and linked actual work sites/voyages; shared beneficiaries explicit	per declared reference flow	meter and laboratory uncertainty; destination/permit and sample-chain records
cp_waste	site_operation	each actual exported waste	actual measured records	atomic waste composition; wet/dry state; tare/gross/net mass or volume; contamination; load/date; receiver/treatment; returns/reuse; same-state measured volume and bulk density; moisture; conversion measurement/provenance and uncertainty	Weigh/meter each actual waste load and reconcile material tickets and receiver records; do not combine unrelated waste materials; for native-mass waste measured volumetrically, retain same-lot/state volume and independently measured bulk density with moisture and units; unknown density requires review, never a default. Waste conversion evidence belongs here, not solely to purchased-component cp_materials.	kg; m3; kg/m3	Each task/load/batch/meter event; delivery close-out	All actual work from baseline to acceptance/restoration; recorded real dates	One declared object and linked actual work sites/voyages; shared beneficiaries explicit	per declared reference flow	weighbridge calibration; composition analyses; manifests and receiver receipts
cp_logistics	logistics	each actual transport leg	actual measured records	mode/vehicle; supplier/treatment/site gates; load cargo mass; actual route distance; vehicle total weight/class; empty return/shared loads	Match vehicle/load tickets and route logs; calculate cargo tonnes times loaded km for compatible service, disclose actual empty return treatment	kg; t; km; t*km	Each task/load/batch/meter event; delivery close-out	All actual work from baseline to acceptance/restoration; recorded real dates	One declared object and linked actual work sites/voyages; shared beneficiaries explicit	per declared reference flow	weighbridge; actual distance logs; supplier dataset service boundary
cp_marine	marine_install	each actual vessel task and fuel	actual measured records	vessel ID; fuel grade/batch; bunker/stock/return; voyage/task/date; route distance; hours; mobilisation/standby/weather delays; all beneficiaries	Reconcile tank measurements/bunker certificates and task logs; direct fuel use first, documented causal sharing only for inseparable campaigns	kg; m3 with actual density; h; km	Each task/load/batch/meter event; delivery close-out	All actual work from baseline to acceptance/restoration; recorded real dates	One declared object and linked actual work sites/voyages; shared beneficiaries explicit	per declared reference flow	fuel certificate; calibrated tanks/flowmeters; survey/lay logs and sharing ledger
cp_gas	station_install	SF6 site charge/recovery/release	actual measured records	gas species/purity; cylinder/equipment IDs; tare/filled/final/recovered masses; factory embedded charge; measured leak/release; location/time	Calibrated cylinder/equipment weighing and verified leak measurement; unexplained residual remains investigation, not assigned release	kg	Each task/load/batch/meter event; delivery close-out	All actual work from baseline to acceptance/restoration; recorded real dates	One declared object and linked actual work sites/voyages; shared beneficiaries explicit	per declared reference flow	scale calibration; gas certificates; recovery receipts and uncertainty reconciliation
cp_emissions	site_operation	each actual molecular/particle air release	actual measured records	source/task; substance/CAS; fossil/biogenic carbon; compartment/time; measured concentration/size fraction; flow/time; equipment/control; matching method and uncertainty	Integrate actual matched concentration with exhaust flow and duration on a common wet/dry/state basis, or use independently supported equipment/control/fuel-specific method; no universal factor	kg; measured concentration; exhaust volume; h	Each task/load/batch/meter event; delivery close-out	All actual work from baseline to acceptance/restoration; recorded real dates	One declared object and linked actual work sites/voyages; shared beneficiaries explicit	per declared reference flow	laboratory/instrument calibration; actual method reference; speciation/particle separation evidence
cp_incident	site_operation	actual mineral-oil spill to soil	actual measured records	incident ID/date; actual oil species/composition; spill/recovered/retained masses; receptor soil; sampling; remediation destination	Use incident measurements and sampled receiving soil, subtract verified captured oil without treating unknown loss as proof of soil release	kg	Each task/load/batch/meter event; delivery close-out	All actual work from baseline to acceptance/restoration; recorded real dates	One declared object and linked actual work sites/voyages; shared beneficiaries explicit	per declared reference flow	incident report; laboratory chain of custody; containment/recovery records
cp_land	site_operation	land occupation and actual transformations	actual measured records	nonoverlapping polygon area; original/changed/restored land classes; use start/end dates; existing easement; marine disturbance separately	Survey actual disturbed/use polygons and dated site records; area multiplied by actual days/365 for m2*a; paired actual transformation rows use Area	m2; day; m2*a	Each task/load/batch/meter event; delivery close-out	All actual work from baseline to acceptance/restoration; recorded real dates	One declared object and linked actual work sites/voyages; shared beneficiaries explicit	per declared reference flow	survey accuracy; dated access/restoration logs; no polygon/time double counting
cp_reuse	site_operation	manufacture share of each reusable asset	actual measured records	unique asset ID; same-configuration measured mass/count; manufacture scope; all prior/current/planned evidenced service; project activity; beneficiary/share history	Retain manufacture once, document the dimensionless causal service share and check cumulative shares across all projects/periods <=1; unknown denominator stays review	kg; item; dimensionless share; actual service unit	Each task/load/batch/meter event; delivery close-out	All actual work from baseline to acceptance/restoration; recorded real dates	One declared object and linked actual work sites/voyages; shared beneficiaries explicit	per declared reference flow	asset register; measured mass/count; supported service denominator; globally conserved share ledger

Calculation Rules

rule_id	Applies to	Formula or rule	Inputs	Output	source_ids
calc_reference	All exchanges	q_ref = Q_object for the one declared accepted object. Only a homogeneous measured batch of N separately identified equivalent objects permits q_ref = Q_batch / N; N is positive and evidenced. Do not divide by guessed mass or unqualified route length.	actual Q in each row unit; cp_delivery object IDs and count	each row amount per declared reference flow
calc_material	Materials, lengths and components	Use actual input crossing the declared gate; installed + exported offcut + verified residual/return reconciliation must equal receipt adjusted for opening/closing stock within measured uncertainty. Keep returns upstream and waste destinations distinct. If weighing is unavailable, mass_kg = measured volume_m3 × same-state measured density_kg/m3 or measured length_m × same-design verified linear mass_kg/m; never a generic density/linear-mass default.	cp_materials received/installed/stock/return records and conversion measurements	actual net input and separate waste in their declared units	eirgrid-underground-2026
calc_energy	Site electricity and diesel	Metered electricity_MJ = electricity_kWh × 3.6. Diesel_MJ = actual diesel_mass_kg × batch net_calorific_value_MJ/kg; where measured by volume, mass_kg = actual volume_m3 × actual batch density_kg/m3. Preserve public Net calorific value and its MJ unit group; the secondary screening Mass value is not a density or heating-value conversion.	cp_energy calibrated meters and actual batch certificates	MJ per declared reference flow
calc_transport	road_freight	transport_tkm = sum(actual cargo_mass_kg / 1000 × actual leg_distance_km); 1 tkm = 1000 kgkm. Match actual vehicle/class/loaded and empty-trip scope of the service dataset, and record separate other modes.	cp_logistics cargo mass, distance and scope	t*km per declared reference flow
calc_occupation	site_occupation	occupation_m2a = sum(nonoverlapping actual area_m2 × actual occupation_days / 365). This public unit definition supplies a time conversion only, never a service life. Record actual land transformation pairs separately in m2.	cp_land actual polygons/dates and public unit definition	m2*a per declared reference flow
calc_gas_water	SF6 and water parcels	For seawater resource mass_kg = actual volume_m3 × evidenced same-salinity/temperature density_kg/m3, or direct measured mass; density unknown remains review. Maintain volume parcel conservation separately and never subtract kg resource directly from m3 discharge. Reconcile receipts/opening stock against retained final stock, verified returns/recovery, exported treatment waste and evidenced direct release on the same composition/state basis. Do not equate unexplained residual with leakage or water consumption; no water parcel may enter both treatment waste and direct discharge.	cp_gas/cp_water metering, stock and destination evidence	actual separate kg or m3 amounts	ifc-power-ehs-2007
calc_reused_manufacture	Included reusable assets	attributed_asset_quantity = measured same-configuration asset mass/count × documented dimensionless manufacture share. Record both factors, actual service denominator and project numerator in cp_reuse; cumulative manufacture shares across projects/periods <=1. Unknown denominator remains review; this is not a conversion of the line reference product to 1 kg.	cp_reuse asset evidence and conservation ledger	kg or item of attributed manufacture, separately from fuel

Data Quality Requirements

requirement_id	Applies to	Requirement	Evidence
dq_geometry	Delivered configuration	Declare actual route versus cable/conductor length, branch endpoints, each cable/circuit/fibre count, voltage/rating/function, support/foundation/duct/shore/station dimensions, soil/seabed conditions and included assets. No design load, size, component mass or life is supplied by this PCR. Apply boundary_qualifiers: measure actual delivered object attributes, and record genuinely absent station/support route or cable attributes as evidenced not_applicable; unknown applicable values remain gaps.	cp_delivery drawings/surveys, actual design and signed acceptance
dq_coverage	Complete actual foreground	Map each actual task and specific BOM item to a record/row. Separate necessary work for that actual configuration from documented absent and optional stages. Preserve measurement coverage, missing data and uncertainty; no arbitrary mass/energy cutoff removes important control gas, leakage, habitat or noise.	task/BOM reconciliation and bounded gap register
dq_representativeness	Supply and background links	Use actual supplier geography, period, technology, material grades, state and complete component boundary. Selected identity conditions are binding on every UUID row; a CN factory cable/grid or GLO oil screening identity cannot justify a generic cross-region inventory. Report unavailable production/transport/treatment links.	supplier original certificates and dataset metadata
dq_uncertainty	Measurement and calculation	Retain instrument accuracy/calibration, detection limits, sampling/speciation, moisture/density/heating-value state and allocation sensitivity. Derive QA tolerances from actual instruments and applicable project specifications. No default numeric intensity, mixture, loss or emission factor is assigned.	calibration, certificates, tests and explicit sensitivity
dq_source_limits	Source applicability	CPC defines entity scope, not recipe or methodology approval. EirGrid/NG documents support bounded route decomposition; their numerical designs/tests stay local. ITU 2009, IFC 2007 and RDSO 2020 provide explicitly historical qualitative examples. Current project evidence controls every quantity, specification and acceptance decision; unsupported transfers remain review.	source version/page and actual applicability record

9. Validation Rules

rule_id	Applies to	Rule	source_ids
validation_object	Reference object	Reject missing object ID, signed delivery state, defined endpoints/interfaces, actual geometry, configuration or relevant functional tests. One item is one complete declared object; do not use a service fee, cable mass or arbitrary work stage as its output. Different objects may not be compared without compatible function/configuration/boundary.	cpc3-explanatory-notes-2025; eirgrid-underground-2026
validation_completeness	Actual route/process inventory	Reconcile every actual drawing/BOM/work/utility/waste item to an atomic row and supplier/process boundary, including support, chambers/boxes, station structures, auxiliaries, railway/optical devices, temporary crossings and reinstatement. Baseline cards are conditional examples, never a universal complete BOM. Missing actual rows, unmeasured significant tasks, unknown shared denominators or unavailable upstream/treatment links remain incomplete/review; do not assert complete expanded lifecycle coverage.	eirgrid-underground-2026; itu-submarine-g971-2024; rdso-rail-ohe-2020
validation_units	Quantities and bases	All amounts must be finite, nonnegative and linked to real records for the same declared reference flow. Verify physical cable versus route length, count scope, same-state density/linear mass, fuel heating value, meter boundaries and gas/water/soil destination reconciliation. Do not infer fixed project mass, per-km intensity, concrete recipe, losses, demand or life. Record justified tolerances from actual instruments/specifications, not fabricated universal QA ranges.	eirgrid-underground-2026; eirgrid-submarine-2022
validation_identity	Selected public flow identities	Verify substance/material, fossil/biogenic origin, product/waste/elementary role, geography, route/state, primary property/unit group and compartment/subcompartment/timing before linking. Preserve exact public Chinese names and shared UUID/row IDs. A blank product reference identity remains the precise declared reference_line gap for this candidate; actual data must disclose every missing identity and dataset link. Neither an identity UUID nor a passed builder check approves methodology.
validation_emissions	Measured releases and environmental evidence	Reject inferred mandatory spill, SF6 leak or emission quantity from fuel/equipment presence. Molecular NO, NO2 and N2O and NOx-as-NO2 are different; immediate/outdoor and long-term/indoor are different; particle fractions must not overlap. Captured dust/slurry and treatment water are not direct environmental emissions. Missing quantified noise/habitat/marine coverage must be disclosed.	ifc-power-ehs-2007
validation_acceptance	Engineering and environmental acceptance	Use the actual applicable authority, project specification revision and test programme for this geography/AC-DC/optical/railway branch, with measured results and independent acceptance records. Sources here support process/method scope and give bounded examples; historic IFC/ITU/RDSO and another operator's numerical criteria are not current legal approval or automatic design compliance.	national-grid-overhead-2025; eirgrid-underground-2026; eirgrid-submarine-2022; itu-submarine-g971-2024; rdso-rail-ohe-2020

10. Published Dataset Profile

Field	Value
dataset_role	Site/project-specific foreground construction-to-accepted-delivery process, linked to actual upstream/logistics/treatment only where verified
downstream_use	Transparent assembly of a declared line/station/railway or other infrastructure study with one-count asset interfaces
allowed_use	The documented site/configuration/period and verified functional object; compatible comparison only after function and stage alignment
excluded_use	Generic per-km/per-kg default; local distribution; component manufacture replacement; operational transmission service; unqualified whole-life or methodology/compliance approval
required_metadata	All section 3 qualifiers; supplier/component gates and geography; actual drawings/BOM; stage/route task records; field units/conversions; allocation/asset history; direct-release media; waste/treatment routes; source versions and test acceptance; documented applicability under boundary_qualifiers
required_quality_disclosure	Measurement/certificate coverage and uncertainty, actual missing atomic rows/UUIDs/upstream links, environmental/noise/habitat gaps, retained/reused assets, historic/local-source applicability and excluded lifecycle stages
update_trigger	Changed design/geometry/route, voltage/fibre/capacity, actual materials/supplier, installation equipment/process, accepted scope/tests, incident or new verified flow/evidence

This profile specifies how a completed dataset must be described; it does not state that this candidate PCR or any dataset is published or scientifically approved.

11. Data Sources

Source id	Type	Reference	Used for
cpc3-explanatory-notes-2025	official_guidance	UN Statistics Division, CPC Version 3.0 explanatory notes, 30 June 2025, p.280 (53242), p.281 (53252): official PDF	Scope: long-distance telecom overland/underground/submarine, high-tension and railway power lines, transformer stations/pylons; low-tension distribution excluded. Classification context only, no accepted mapping or engineering recipe.
national-grid-overhead-2025	official_guidance	National Grid, Grimsby to Walpole PEIR, Vol.3 Part C Chapter 5 appendices, June 2025, §5A.3.26 and §5A.3.28, printed 5A-35–36 (PDF pp.41–42): official PDF	Proposed UK 400 kV overhead/AIS route process example: access, foundations, erection/stringing, station installation/tests and reinstatement. Qualitative process sequence only; no assumed span, foundation quantity, lifetime or project approval.
eirgrid-underground-2026	standard	EirGrid, 110/220/400 kV Underground Cable Functional Specification, CDS-GFS-00-001-R2.1, 27 March 2026, §2 p.8, §4.12 pp.25–27, §6 pp.52–65, §7 pp.66–78, Appendix C pp.88–90; Addenda A/B pp.79–84: official PDF	Ireland EirGrid fully ducted 110/220/400 kV systems: complete components, civil/handling/pulling/jointing and as-built/test records. §7.9.2 replaced by Addendum A; §4.7 by B. No local numerical criteria, all-duct requirement, warranty or test approval transferred to other designs.
eirgrid-submarine-2022	standard	EirGrid, 220 kV Submarine Cable Functional Specification, OFS-CAB-100-R3, 21 December 2022, scope p.3, §6.4–6.5 pp.28–31, §10–12 pp.57–66: official PDF	Fixed/static 220 kV XLPE three-phase 50 Hz AC offshore systems, depth≤200 m; excludes inter-array/floating and land cable after shore transition joint. Route/lay/burial/protection/records examples only; other AC/DC/deeper/dynamic systems need own evidence and tests.
itu-submarine-g971-2024	standard	ITU-T G.971, General features of optical fibre submarine cable systems, December 2024, Annex A.2–A.4, printed pp.7–9 (PDF pp.13–15): official PDF; Cor.1 November 2025: official PDF	Optical submarine survey/conditional clearance, laying, optional burial, repeaters/branching, terminal tests and commissioning. Cor.1 updates Appendix I equipment information, not Annex A. A.5 later maintenance excluded. Not electric-power cable tests or default vessel fuel/life.
itu-optical-installation-2009	handbook	ITU-T, Optical fibres, cables and systems, 2009, Chapter 3 §§1.1,1.5,1.6,1.8,1.9,1.11, printed pp.61–66,74–80,84–90 (PDF pp.83–88,96–102,106–112): official handbook	Historical qualitative distinction of duct pulling/blowing, direct burial, aerial/OPGW, railway telecom and submarine techniques. Actual modern product specification/tests control; no old numerical limits or lifetime adopted.
ifc-power-ehs-2007	official_guidance	IFC, Environmental, Health, and Safety Guidelines: Electric Power Transmission and Distribution, 30 April 2007, pp.2,7: official PDF	Historical qualitative screen for erosion/dust, wastes/water, traffic/noise, habitat, potential oil spills and SF6. No presumed release, emission factor, present legal approval or all-life boundary. Actual contemporary permits and measurements required.
rdso-rail-ohe-2020	official_guidance	Indian Ministry of Railways/RDSO, TI/IN/0042, OHE guidelines for increasing speed potential to 160 kmph on NDLS–HWH & NDLS–BCT routes, October 2020, §§1.1–1.3, PDF/printed pp.3–11: official PDF	Historical named railway example distinguishing mast/foundation, feeder, contact/catenary wire and earth conductors, with existing-asset suitability. No speed, alloy, size, tension, wind loading, spacing or lifetime is imposed on this category; actual project evidence controls.