:: The Ida Leona Mine

Introduction

The Ida Leona mine is located 6 miles west of the City of Perris. Records indicate that there was gold mining in the vicinity as early as 1861. The area has been known as Gavilan, Cedar Flat, and Westbrook. A copy of the original Articles of Incorporation for the Gavilan Mining and Milling Company clearly states that it was signed and sealed on 16 October 1891. It was thought that the Ida Leona was an offshoot of the Gavilan vein.

The collection contains 3 blueprints and 5 measured drawings and should be of interest to people studying local mining activity.

The collection is housed in 2 boxes and is 3 linear feet.

History

Spanish speaking gold miners worked in the area known as Gavilan beginning as early as 1861. The area was also known as Cedar Flat and Westbrook for a short time, and plans for a township were laid out but never acted upon. In later years, the Gavilan (Ida Leona) mine was said to have produced approximately $400,000 in gold ore.

The original stockholders in the Gavilan (Ida Leona) mine contributed $69,500.00 to the venture in 1891.

The first mention of the Ida Leona/Gavilan mine is found in the 24th & 25th annual Report of the State Mineralogist, c. 1928. The mine is located 6 miles west (though later records suggest that it was northwest) of the City of Perris in Riverside County -- on the old Rancho Sobrante de San Jacinto. Between 1935 and 1936, only 3 men were employed at the mine, and the property was leased to H. L. Nelson and Sons. But between 1937 and 1938, there were 15 men on the payroll. In 1939, the ore that was mined was worth $25.00 - $50.00 per ton.

The 1957 issue (vol. 53, nos. 3 and 4) of the California Journal of Mines and Geology states that the Ida Leona Mining Company, "Recorded production of 3,000 tons of gold ore [between] 1936 [and] 1942."

Scope and Content

The collection consists of two map boxes containing 5 measured drawings and 3 blueprints of the Ida Leona Mine, and the dates range from October 1935 to May 1942.

Series Description

Series 1 – Blueprints and measured drawings

FOLDER 1

Item 1

Blueprint #977E – Head Frame and General Mill Elevation. Oct. 29, 1935 by Groch Engineering. 1/4" = 12"

Item 2

Blueprint #977P – Plan of Mill, Ida Leona Mine and Milling Company by Groch Engineering. 3/4" = 12"

Item 3

Measured drawing - Map of portion of the underground workings, Ida Leona Mine. Dated Jan. 1939, 1" = 10 ft.

Item 4

Measured drawing - Map of a portion of the underground workings, Ida Leona Mine. Dated Jan. 1939 and stamped "Defendant's Exhibit no. 3, filed 29 March 1939, case #30679".

FOLDER 2

Item 1

Blueprint #977E - Head frame and general mill elevation dated 29 October 1935 by Groch Engineering (cover) 1/4" = 1 ft.

Item 2

Measured drawing - Map of a portion of the underground workings, Ida Leona Mine, dated Jan. 1939, 1" = 10 ft.

Item 3

Measured drawing - Map plat of survey of 250' level, 1" = 50 ft.

Item 4

Measured drawing - Map of a portion of the Ida Leona Mine, 1" = 40 ft.

References

Patenting mining claims and mill sites in California. J. R. Evans, editor. Sacramento, California: Bureau of Land Management, California State Office, c. 1990

The Shirley Letters from the California mines, 1851-1852. Clappe, Louise Amelia K. S. Berkeley, Calif. Heyday Books, c. 1998

California surface mining and reclamation policies and procedures: with the surface Mining and Reclamation Act of 1975. California State Mining and Geology Board. 3rd revision, c. 2000

Patenting mining claims and mill sites in California. J. R. Evans, editor. Sacramento, California: Bureau of Land Management, California State Office, c. 1990

Reports of the State Mineralogist. California State Mining Bureau, c. 1926 – 1940

Riverside County, California, Place Names: Their Origins and Their Stories. Gunther, Jane. Riverside, CA, c.1984

San Bernardino County Archives

Local History