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  "road_source": "OpenStreetMap (local PBF extract)",
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  "notes": "Coarse pass: max 15.8% over 200 m (Terrain 50), gain 131.6 m over 1791 m way. EXTENDED by graph walk: +1 segment(s) at base, +1 at top (stop: base=no_descending_continuation, top=no_ascending_continuation; min_avg=2.0%). Review before adopting. DEDUPE: absorbed 5 overlapping proposal(s): cedar-street, portland-street, spring-street, spruce-street, winter-street-2 ADOPTED (NE wave 1, 2026-08-25): clean-steep. Wales dials per PRODUCTION 'US ADOPTION DIALS'.",
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   "ept_source": "https://s3-us-west-2.amazonaws.com/usgs-lidar-public/NH_Umbagog_2016",
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  "license_url": "https://howsteep.org/licensing.html"
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}