100 years ago this month, April 1915, the U.S. Reclamation Service issued a 200-page report on the Pit River Basin. The purpose being “to assess the feasibility of constructing works for the full utilization of the waters of the river and its tributaries… for the highest public advantage.“ The Report makes no reference to native peoples or tribes. Among the considerations was a 25-mile aqueduct to enhance the river from Clear Lake, which flowed north as the (rechanneled) Lost River to the Klamath River. This did not happen. 
Last month, March 2015, the Pit River Tribe and their allies were in court to protect the Medicine Lake Highlands from geothermal destruction and desecration. The Pit River, Wintun, Karuk, Shasta and Modoc Nations hold the Medicine Lake Highlands sacred, and have used the region for healing, religious ceremonies and tribal gatherings for thousands of years. [2, 3]. Calpine Corporation, a Fortune 500 company, was founded in San Jose, California, and has based in Houston, Texas, since 2009.
Both aquifers contribute the Upper Sacramento Headwaters of California’s the Central Valley Project.  Rock art is one of many testimonies to the continuous presence of indigenous peoples within the Pit River and the Modoc Plateau watersheds for many millennia.
 Report on the Pit River Basin. April 1915. U.S. Reclamation Service Office, Portland Oregon.
 Pit River Tribe Rallies to Protect Medicine Lake March 13 2015. by Dan Bacher. An excellent and timely news article.
 Central Valley Project per Wikipedia
 Protect Medicine Lake website
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