start_reachcode is a JSON Structure definition published by EPA — U.S. Environmental Protection Agency. It conforms to the https://json-structure.org/meta/core/v0/# meta-schema.
{
"$schema": "https://json-structure.org/meta/core/v0/#",
"$id": "https://raw.githubusercontent.com/api-evangelist/epa/refs/heads/main/json-structure/cip-service-start-reachcode-structure.json",
"name": "start_reachcode",
"description": "NHD flowline 14-byte reach code value from which to begin the navigation. Provide a start measure to indicate a specific position on the reach.",
"type": "string",
"minLength": 14,
"maxLength": 14
}
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