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Culvert Headwall

highway.cross_drainage_system.headwall

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Definition

Retaining wall at a culvert inlet or outlet holding back the embankment.

Class kind: component
Abstract: no
Depth: 2
Origin: reference source
Ontology: engineering-reference-book.highway v0.1.0
Aliases: Head Wall, Wing Wall
Abbreviations: —
Last changed: 7/27/2026, 2:50:06 PM

Identification

Positive labels: Culvert Headwall, Head Wall, Wing Wall
Negative labels: —
Visual features: —
Min identity clues: 2

Evidence

Preferred views: detail, plan
Evidence types: view, detail, schedule, note, dimension, level, section_callout
Source trace required: yes

Measurements (3)

Name	Symbol	Unit	Required
Instance Count	`N`	count	required
Height	`H`	m	optional
Volume	`V`	m3	optional

Relationships (1)

retainshighway.earthwork_system.embankment

BOQ items (0)

None — no quantity is derived from this class directly.

Validation

Blocking if missing: no
Human review allowed: yes

no_evidence_no_number
retain_document_page_bbox_and_evidence_id
do_not_mix_drawing_revisions
do_not_average_conflicting_values
prefer_explicit_labels_over_shape_only
match_plan_profile_and_cross_section_when_applicable

Provenance

Basis: taxonomy_spec
Project values included: no
mindmap_module_spec_taxonomy_highway: no page list

Children (0)

None — this is a leaf class and can be deleted.