Brand name: PSP
Company: Pacific Sewer Pipe Co.
Location: Plant no. 3, 1 mi. West of Corona on North side of Santa Fe RR, Riverside County, CA.
Type: Enameled face brick
Description: Company's initials are impressed on the face within a deep rectangular frog.
Equipment: 8 oil-fired round, down-draft kilns, well-equiped brick machinery.
Deposit: McKnight pit, Riverside County, black flint clay, 20 ft. thick, and blue refractory clay, 10 ft. thick, overlain by 20 ft. of reddish plastic clay. Mined by tunnel.
Comments: This plant was formerly owned and built by the Pacific Clay Manufacturing Company.
The Pacific Sewer Pipe Company was merged with the Pacific Clay Products, Inc. in 1921.
Source: Brick and Clay Record, v. 58, no. 3, 1921, p. 235; California State Mining Bureau
Preliminary Report 7, 1920, p. 57, 90; California State Mining Bureau Report 15, 1917, p. 568-571.
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