A PROPOSED waterway to rival the Panama Canal could make Nicaragua the richest country in Central America, a project official was quoted as saying on Sunday.

President Daniel Ortega recently approved the US$40-billion undertaking, granting the concession to little-known Hong Kong-based company HK Nicaragua Canal Development Investment Co, known as the HKND Group.

Under the deal, the company led by Chinese tycoon Wang Jing gets 50 years of exclusive rights to build and operate the canal in exchange for Nicaragua receiving a minority share of the profits.

Now its poorest nation, "Nicaragua will become by far the richest country in Central America ? and that will affect the entire region," the La Paz daily Pagina Siete quoted HKDN spokesman Ronald MacLean Abaroa as saying.

MacLean Abaroa, a former World Bank official from Bolivia, is a former mayor of La Paz and now serves as an adviser to HKND.

"Investment in this project is three to four times the GDP of Nicaragua, there will be an effect of full employment and prosperity," he was quoted as saying.

Environmentalists have warned the project could spark an environmental disaster that threatens drinking water supplies and fragile ecosystems.

MacLean Abaroa has said in the past that the company was considering four possible routes for the waterway, and all would necessarily go across Lake Nicaragua.

The canal plan includes building ports, an airport, pipeline and a railway. A free trade zone is also set to be created. Work should begin in May 2014 after a feasibility study is completed.