Revista de Obras Públicas de Puerto Rico, Volume 11, Issue 11934 - Public works |
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acre acres Aguadilla amount area Arecibo average beds belt Botanical Britton Caguas Camuy Carr carretera Celador cemento ción coast Comisionado del Interior Committee Company construcción contain contratos Corozal costo deposits depth developed development dragado east económico elevation estimate exploration feet feet deep following formation found further gastos give gold great Guanica hematite high hills horsepower Humacao indicated industria ingeniero Insular interest iron isla island known Lake Lares District less level lignite limestone limonite lower Luquillo made magnetite make manganese material Mayagüez mineral mining mundo navigation necessary New York north number obtained occur Oligocene Ontario panning places Ponce Porto Rico possible power property Puerto Rico quantity Quebradillas report Riego river road rock rocks samples sampling sand Sección servicio shale show shown small south species Staten Island streams surface survey taken Tertiary time tonnage Total United States upper used value warrant water west work year years