The Troy plate. Relief from Copernicus GLO-30; rivers and lakes from USGS NHD; watersheds from the USGS Watershed Boundary Dataset; roads and city limits from Census TIGER 2024.
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73° on Nov. 11, 2020, the hottest reading for this week of the year since 1947. Next is 70° in 2002.
Troy’s center stands about 480 ft above sea level. Within three miles the land runs from 220 ft to 780 ft, a difference of 560 ft: hilly country. The highest named summit within 15 miles is Mount Harris, about 1,260 ft, 5 miles east.
Under the town center the state geologic map shows Silurian - Ordovician Vassalboro Formation (sandstone), from the Late Ordovician to Silurian, 428 to 459 million years old.
The section below crosses 3 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 17×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Sandstone. Age: Late Ordovician to Silurian, 428 to 459 million years old. About 23 mi of the line.
Schist, slate. Age: Silurian, 428 to 445 million years old. About 1 mi of the line.
Mudstone. Age: Ordovician to Silurian, 422 to 487 million years old. About 0.4 mi of the line.
From the USGS State Geologic Map Compilation (Horton and others, 2017), the states’ geologic maps joined at a common scale.
Heights from Copernicus GLO-90 (a surface model: it includes buildings and tree canopy); summits from USGS GNIS; rivers from USGS NHDPlus HR; rock from the USGS State Geologic Map Compilation.
A raindrop that lands in Troy reaches the Atlantic Ocean by way of Shaw Brook, the Carlton Stream, the Sandy Stream, the Twentyfive Mile Stream, the Sebasticook and the Kennebec: about 100 river miles.
60 miles of the trip are on the Kennebec.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Troy; river miles along the main stem, rounded.
Troy has a warm-summer humid continental climate. Summer afternoons average 81° in July; winter nights fall to about 6° in January. A normal year brings about 72 inches of snow; with the rain, that comes to about 45 inches of water.
On November 14 Troy normally reaches 47° and falls to 28°. The record high is 67°, in 2022; the record low 5°, in 2019. The most rain on this date, 1.03 in, fell in 1949.
Normals 1991–2020 and records since 1947 at Corinna, 18 miles north, 180 ft lower. NOAA, through RCC-ACIS.
