The Bondurant 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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64° on Nov. 13, 1999, the hottest reading for this week of the year since 1948. Next is 61° in 2016.
Bondurant’s center stands about 6,610 ft above sea level. Within three miles the land runs from 6,510 ft to 8,010 ft, a difference of 1,500 ft: steep hill country. The highest named summit within 15 miles is Doubletop Peak, about 11,660 ft, 12 miles north-northeast.
Under the town center the state geologic map shows Alluvium and Colluvium (clay, silt, sand), from the Pleistocene to Holocene, less than 2.6 million years old.
The section below crosses 10 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 4×. 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, sandstone. Age: Paleocene to Eocene, 34 to 66 million years old. About 8 mi of the line.
Claystone, sandstone. Age: Paleocene, 56 to 66 million years old. About 7 mi of the line.
Clay, silt, sand. Age: Pleistocene to Holocene, less than 2.6 million years old. About 2 mi of the line.
Conglomerate. Age: Eocene, 34 to 56 million years old. About 2 mi of the line.
Sand, gravel, boulders. Age: Pleistocene to Holocene, less than 2.6 million years old. About 2 mi of the line.
Gneiss. Age: Archean. About 1 mi of the line.
From the USGS State Geologic Map Compilation (Horton and others, 2017), the states’ geologic maps joined at a common scale. 4 smaller units along the line are not listed.
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 Bondurant reaches the Pacific Ocean by way of the Hoback, the Snake and the Columbia: about 1,280 river miles.
Lakes on the way: American Falls Reservoir, Palisades Reservoir, Lake Umatilla and Brownlee Reservoir.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Bondurant; river miles along the main stem, rounded.
Bondurant has a warm-summer humid continental climate. Summer afternoons average 80° in July; winter nights fall to about 2° in January. A normal year brings about 141 inches of snow; with the rain, that comes to about 20 inches of water.
On November 14 Bondurant normally reaches 40° and falls to 17°. The record high is 64°, in 1999; the record low −15°, in 2000. The most rain on this date, 0.78 in, fell in 1958.
Normals 1991–2020 and records since 1948 at Bondurant, here. NOAA, through RCC-ACIS.
