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Securing Arizona's Water Future
Land Ownership in the McMullen Valley Basin

Land ownership, including the percentage of ownership by category, for the McMullen Valley Basin is shown in Figure 7.5-2.  The principal feature of land ownership in this basin is the limited number of land ownership types. A description of land ownership data sources and methods is found in Volume 1, Appendix A.  More detailed information on protected areas is found in Section 7.0.4.  Land ownership categories are discussed below in the order of largest to smallest percentage in the basin.

U.S. Bureau of Land Management (BLM)

  • 51.8% of the land is federally owned and managed by the Yuma Field Office of the Bureau of Land Management.
  • This basin contains 9,000 acres of the 23,000 acre Harquahala Mountains Wilderness and 14,000 acres of the 25,000 acre Harcuvar Mountains Wilderness. (see Figure 7.0-12)
  • Land uses include grazing, resource conservation and recreation.

State Trust Land

  • 33.4% of the land is held in trust for the public schools under the State Trust Land system.
  • Land uses include agriculture and grazing.


  • 14.8% of the land is private.
  • Land uses include agriculture, domestic and commercial.

Click here for Figure 7.5-2

Figure 7.5-2 McMullen Valley Basin Land Ownership



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References and Supplemental Reading for the McMullen Valley Basin

Colorado River
Lower Colorado River Planning Area
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Eagle Eye Peak
Centennial Wash