Okukubi Dam
... that Okukubi Dam in Okinawa Prefecture, Japan, will be the world's first trapezoidal cemented, sand and gravel dam?
... that <b id="mwD68"><a href="./Okukubi_Dam" id="mwD7A" rel="mw:WikiLink" title="Okukubi Dam">Okukubi Dam</a></b> in <a href="./Okinawa_Prefecture" id="mwD7E" rel="mw:WikiLink" title="Okinawa Prefecture">Okinawa Prefecture</a>, Japan, will be the world's first trapezoidal cemented, sand and gravel dam?