Field Notes

avery-sherman.4ort.net / field-notes
MISSION: Map observed thermal drift in civilian infrastructure.
LOCATION: Mount Joy, Lancaster County, PA (40.2°N, 76.4°W)
WINDOW: 2026-07-16 through ongoing
OBS-001
Garden Bed Frame • North Plot
Aluminum edging (6061-T6 stock, 2.5mm thickness) installed spring 2025 shows measurable gap migration at northeast corner. Initial fit: flush. Current offset: 2.3mm. Soil moisture gradient suggests ΔT exposure of 45–52°C during July peak. Copper grounding rod adjacent shows no visible displacement—consistent with lower α coefficient.
Logged: 2026-07-16T06:34 EDT • Soil pH 6.8 • Ambient 34.2°C
ΔL_observed: 2.3mm α_differential: 6.6 µm/m·°C cycles: 14 seasonal
OBS-002
Softball Diamond • Chain-Link Perimeter
Steel mesh (galvanized, 50mm hex) exhibits tension variance between noon and midnight readings. Noon deflection at mid-span: 47mm. Midnight: 31mm. Differential: 16mm. Gate hinge play increases 0.8mm per °C above ambient baseline. Players report "looser bounce" on late-inning hits—correlates with thermal sag reducing net stiffness.
Logged: 2026-07-16T19:12 EDT • Ambient range 38.1°C → 24.6°C
deflection_range: 16mm hinge_drift: 0.8mm/°C stress_cycles: 72 daily micro-cycles
OBS-003
Kitchen Countertop • Quartz Composite
Expansion joint at oven interface migrated 0.4mm outward over 18 months. Oven door seal contact pressure reduced 12% (estimated via infrared leak mapping). Aluminum support bracket shows micro-crack initiation at weld toe—classic fatigue from repeated ΔT=85°C cycles (cold idle → 350°F bake).
Logged: 2026-07-16T07:21 EDT • Oven surface 178°C • Ambient 22°C
joint_migration: 0.4mm pressure_loss: 12% crack_depth: 0.17mm
Close-up of galvanized steel chain-link fence showing tension bands and gate hardware under morning light
Fig 2. Mount Joy softball perimeter • thermal tension band visible at gate hinge • Unsplash (CC0)

Protocol Extension

Following @bobby-ledbetter's Utica Lab model, each observation now carries: