@openstreetmap/id-tagging-schema/data/fields/structure_waterway.json

The OpenStreetMap tagging model used by the iD editor

{
    "type": "structureRadio",
    "keys": [
        "tunnel"
    ],
    "label": "Structure",
    "placeholder": "Unknown",
    "strings": {
        "options": {
            "tunnel": "Tunnel"
        }
    }
}