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 United States Special Representative 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.
Background
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.
In 1953, Israel began construction of a water carrier to take water from the Sea of Galilee to the populated center and agricultural south of the country, while Jordan concluded an agreement with Syria, known as the Bunger plan, to dam the Yarmouk river near Maqarin, and utilize its waters to irrigate Jordanian territory, before they could flow to the Sea of Galilee. Military clashes ensued, and US President Dwight Eisenhower dispatched ambassador Johnston to the region to work out a plan that would regulate water usage.
CIA Declassified Documents
Banat Yacov Project. 7 February 1956:
I. Next foreseeable crisis date in Arab-Israeli situation comes on 1 March, the "deadline" date which Israelis gave Amb. Johnston last autumn for gaining Arab acceptance of Jordan river valley scheme. After 1 March, Israelis told Johnston, they would feel free to go ahead with unilateral Israeli plan for using Jordan Waters.
II. Bone of contention is so-called Banat Yacov project, which takes its name from bridge crossing Jordan River some 8 mi. north of Lake Tiberias (Sea of Galilee).
Israel wishes to complete canal on western side of Jordan River, running southward from Banat Yacov to Lake Tiberias. Objective is stated to be only electric power—diverted water would drop about 800 feet to power-station near Tiberias shore, then flow back into lake. Problem—first 1 1/2 mi. of canal must pass through "demilitarized zone" established under the Israeli-Syrian armistice agreement. Syrians maintain (with partial support from UN truce observers) that Israeli project would violate armistice agreement, take water away from Arab landowners in Syria and Jordan. Israelis maintain (also with partial support of UN truce people) they are within legal rights. III. Question came to UN Security Council shortly after Israelis began work on project over two years ago. (Sep '53).
In Oct. '53, Security Council passed resolution asking Israel to suspend work on Banat Yacov project while Council considered problem. Subsequently, SC Resolution proposing that matter be referred to UN Truce Supervisor was vetoed by USSR. No formal action since then: accordingly, SC is still in theory seized with problem, and Israelis have, up to present, held off on work within actual "demilitarized zone" while continuing work on seven-mile stretch within their own territory.
IV. However, Israelis have made their "postponement" of Banat Yacov completion contingent on implementation of Johnston plan.