A reconstruction, not a survey. The street grid and block layout come from the 1880 plat; the ground, water and buildings are placed from later maps and period evidence, then filled in with house types that were common in Castle Valley around 1890.
From Greg's map folder
Plat of Castle Dale, surveyed by M. J. Shelton, Dec. 28, 1880; filed Dec. 19, 1889; recorded Oct. 7, 1891. It sets out blocks 1–43, the Academy and Public Block (20), the courthouse quarter (12), the school site north of Block 19, and the wash that crosses Block 17.
1986–87 reconnaissance architectural survey. Its A-block numbers match the plat, which fixes each block against modern street names and places Cottonwood Creek.
Sanborn fire insurance map, April 1917. Confirms First North is 99 feet wide and shows the footprints and materials of early houses.
USGS topographic map (TopoZone print). The source for the bench and bluffs north of town, the dry wash, the cemetery on the bench, and the fall of ground toward the creek.
From outside research
Settlement 1877–79, dugouts under a cottonwood, first bishop Jasper Peterson: DUP marker no. 152 (HMdb).
Mammoth Canal (begun c. 1884) served the townsite and north benchlands; Blue Cut Canal watered land west and south of town: Edward A. Geary, A History of Water Development in Emery County.
Justus Wellington Seeley II house, 1889: adobe faced with brick hauled from the railroad at Price (JacobBarlow.com; NRHP listing).
Log construction with mud-and-willow plaster, whitewash, and cedar shingles: the 1879 Emery County Cabin.
Later Main Street commerce, including James Peterson's store in his home at 225 E. 100 North: ETV News.
How to read the tags
Documented The place or building appears in a source above. Approximate The feature is real but its exact line or size is estimated. Representative The house or crop is typical of the period, but no source puts that exact one on that lot.
Plat notes “N.H.”, “C.R.M.” and “K.H.” on Block 19 are shown as public buildings, but what the initials stand for has not been confirmed. Terrain height is exaggerated 2.2× so the bench reads clearly; buildings are drawn about 1.4× life size for legibility.