Rancho Cañada del Rincon en el Rio San Lorenzo

In 1845, Sainsevain married Paula Suñol (1827-1883), whose father owned Rancho Los Coches near San Jose.

With the cession of California to the United States following the Mexican-American War, the 1848 Treaty of Guadalupe Hidalgo provided that the land grants would be honored.

[7] In 1859 Sainsevain traded Rancho Cañada del Rincon en el Rio San Lorenzo to the Davis and Jordan Lime Company, for their coastal steamer, the "Santa Cruz".

In 1872, the California Powder Works also acquired the San Lorenzo Paper Mill’s land when that company went out of business.

[10] With the excellent grade of limestone and large quantities of available fuel, the kilns were moved from Santa Cruz to Rancho Cañada del Rincon en el Rio San Lorenzo.