The Henefer 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. 12, 1967, the hottest reading for this week of the year since 1940. Next is 73° in 1999.
Henefer’s center stands about 5,340 ft above sea level. Within three miles the land runs from 5,290 ft to 6,930 ft, a difference of 1,640 ft: steep hill country. The highest named summit within 15 miles is Lewis Peak, about 9,280 ft, 11 miles south.
Under the town center the state geologic map shows Alluvium and colluvium (unconsolidated), from the Quaternary, less than 2.6 million years old.
The section below crosses 6 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 6×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Mudstone, conglomerate. Age: Late Paleocene to Early Eocene, 48 to 59 million years old. About 13 mi of the line.
Conglomerate, mixed-clastic. Age: Late Cretaceous to Early Eocene, 48 to 100 million years old. About 4 mi of the line.
Unconsolidated. Age: Quaternary, less than 2.6 million years old. About 3 mi of the line.
Sandstone. Age: Early Cretaceous, 100 to 145 million years old. About 2 mi of the line.
Sandstone, mudstone. Age: Late Cretaceous to Late Paleocene, 56 to 100 million years old. About 1 mi of the line.
Sandstone, shale. Age: Late Cretaceous, 87 to 94 million years old. About 0.8 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 Henefer reaches Great Salt Lake by way of the Weber: about 65 river miles. Great Salt Lake has no outlet to the sea: the water leaves only by evaporating or soaking into the ground.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Henefer; river miles along the main stem, rounded.
Henefer has a warm-summer humid continental climate. Summer afternoons average 89° in July; winter nights fall to about 12° in January. A normal year brings about 72 inches of snow; with the rain, that comes to about 15 inches of water.
On November 14 Henefer normally reaches 49° and falls to 23°. The record high is 70°, in 1967; the record low 6°, in 1959. The most rain on this date, 1.11 in, fell in 2006.
Normals 1991–2020 and records since 1940 at Echo Dam, 5 miles southeast, 130 ft higher. NOAA, through RCC-ACIS.
