06/04/2026
#ᴛʙᴛ 𝐉𝐮𝐧𝐞 𝟒, 𝟏𝟖𝟕𝟔 - 𝐓𝐡𝐞 𝐏𝐢𝐨𝐜𝐡𝐞 𝐃𝐚𝐢𝐥𝐲 𝐑𝐞𝐜𝐨𝐫𝐝 𝐑𝐞𝐩𝐨𝐫𝐭𝐞𝐝:
The Sutro Tunnel is now in a distance of 13,238 feet. The quantity of water now running out of it in 127 miners' inches. The rock in the heading is porphyry of a aniform character, and is very difficult to drill and very hard to blast.