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Name
Sycamore Canyon
Prospect South of Sycamore Canyon
Unnamed
Pittsburg Sand Company
Roberts Sand Company Black Diamond
Unknown
Marchio Sand Co.
Prospects East of Russellman Sw1/4 Se1/4
Unknown
Prospect Near Sunshine Camp
Mt. Diablo Rock and Asphalt Co.
Prospect In Sycamore Canyon
Perkins Canyon Prospect
Prospects In Perkins Canyon
Unnamed.
Antioch Sand Company
Basalt Rock Company
Holland Sandstone Brick Co.
Longwell Ranch Central, North and South Pits
Quarry
Gambetta
Turtle Rock Quarry
Martin
Harrison-Birdwell - Pacific Cement and Aggregates Co.
Summit of Zion
Silver Mine
H. J. Kaiser
Mount Zion
White Diamond Claim
San Pedro Claim
Eagle Peak
Black Point
Mitchell Canyon
Alves
Alvarnez
Alves
N. M. Ball Sons
Gallagher and Burke
Ball
Martinez
Christen
Mcnears
Port Costa Clay Products Co.
Henry J. Kaiser Company
Tunnel Rock
Oakland, Antioch & Eastern Rr Co.
Old Stege Bates, Boreland & Ayer. Central Const. Co., Bruce
Unknown
El Cerrito Stege, Hutchinson
Point Isabel
Diablo
Point Molate Healey-Tibbets Co.
Blake Brothers San Pablo
Red Rock
Richmond Point Richmond
Unknown
Brooks Island Healy - Tibbitts
Silver Mine
Mount Diablo Mine
Mount Zion Chrome
Unknown
Unknown
Unnamed Prospect
Unnamed Location
Unnamed Location
Silica Co. of California
Silica Company of Calif.
Silica Co. of Calif.
La Felis Claim
Calif. Peat Co.
Calif. Peat Co.
Byron Plant
Unnamed
Unknown
Mt. Diablo Lime Marl Co.
Unity ? Claim
La Feliz Claim
Arroyo Del Cerro Prospects
Unnamed
Unnamed
Bailey Ranch Pumice Deposit
Immel
Unnamed
Serra Brothers Slater
Prospects North of North Peak
Antioch
Antioch Paving Co.
Henry J. Kaiser Company
Cowell Silver Sand Co., Laws
United Materials and Richmond Pressed Brick Co.
Red Rock
Calif. Peat Co.
Calif. Peat Co.
Quarry Products Inc
N. M. Ball Sons
Mt. Diablo Rock & Asphalt Co.
Mitchell Canyon Prospect
Gallagher & Burke
Unnamed Location
Unnamed Location
Eagle Peak
Cowell
Antioch-Marchio
Martinez
Unnamed Location
Unnamed Location
Unnamed Location
Turtle Rock
Unnamed Location
Stoner Pit
Antioch Sand Co.
Mt. Diablo Lime Marl Co.
Scott Pit
Unnamed Location
Antioch
Blake Brothers Quarry
Contra Costa Company
Pacific Cement & Aggregates Co.
Mount. Zion Copper Co. Mine
Unnamed Prospect
Richmond Mill
Tunnel Rock
Mount. Diablo Mine
Unnamed Location
Clayton Quarry
Unnamed Location
Basalt Rock Co.
Unnamed Location
1b Du Pont B Plant Ti
Henry J. Kaiser Co.
Unnamed Location
La Felis Claim
Unnamed Location
Harkinson Lime Deposit
Unnamed Property
Mount. Zion Chrome
Unnamed Location
Unnamed Location
Old Stege
Unnamed Location
Pacif Cement and Aggregrates
Silver Sand
Brssi & Land Mag Co
Alves Pit
Unnamed Location
Unnamed Location
Unnamed Location
Unnamed Location
Point Molate
Red Rock