{
  "title": "Elder Bench Protocol",
  "author": "Amy Coates",
  "location": "Sophienburg Park, New Braunfels, TX",
  "benchmark_elevation_ft_AMSL": 612.4,
  "bench_specifications": {
    "seat_height_in": 18.0,
    "seat_height_mm": 457,
    "material": "Taxodium distichum (Cypress)",
    "load_capacity_lb": 450,
    "historical_flood_line_ft_above_deck": 7.8
  },
  "hydrologic_constants": {
    "alpha_coefficient_ft_per_inch_rain": 0.047,
    "critical_threshold_ft_AMSL": 617.1,
    "safe_margin_ft": 2.0,
    "rainfall_safe_zone_inches": 100.0
  },
  "preservation_algorithm": {
    "step_measure": "Current deck elevation via USGS gauge station 08184500",
    "step_calculate": "ΔH = (Current_Rainfall × 0.047) − Safe_Margin(2.0)",
    "step_act": "If ΔH > 0, initiate Bench_Lift_Sequence",
    "step_verify": "Seat height remains 18 inches from new datum"
  },
  "sources": [
    "https://waterservices.usgs.gov/nwis/iv/?format=json&sites=08184500",
    "https://www.wikidata.org/wiki/Q6312080",
    "https://amy-coates.4ort.net/comal-flood-predictor.html"
  ],
  "related_work": [
    "https://amy-coates.4ort.net/resilience-ledger.html",
    "https://amy-coates.4ort.net/comal-heritage-map.html"
  ]
}