Jordan Valley Unified Water Plan

The Jordan Valley Unified Water Plan, commonly known as the "Johnston Plan", was a plan for the unified water resource development of the Jordan Valley. It was negotiated and developed by US ambassador Eric Johnston between 1953 and 1955, and based on an earlier plan commissioned by United Nations Relief and Works Agency for Palestine Refugees in the Near East (UNRWA). Modeled upon the Tennessee Valley Authority's engineered development plan, it was approved by technical water committees of all the regional riparian countries—Israel, Jordan, Lebanon and Syria. Though the plan was rejected by the Arab League, both Israel and Jordan undertook to abide by their allocations under the plan. The US provided funding for Israel's National Water Carrier after receiving assurances from Israel that it would continue to abide by the plan's allocations. Similar funding was provided for Jordan's East Ghor Main Canal project after similar assurances were obtained from Jordan.

In the late 1930s and mid 1940s, Transjordan and the Zionist Organization commissioned mutually exclusive, competing water resource development studies. The Transjordanian study, performed by Michael G. Ionides, concluded that the naturally available water resources were not sufficient to sustain a Jewish homeland and the destination of Jewish immigrants. The Zionist's study, by the American engineer Walter Clay Lowdermilk concluded similarly, but noted that by diverting water from the Jordan River basin to the Negev for support of agricultural and residential development there, a Jewish state with 4 million new immigrants would be sustainable.

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