Bogowonto river that split Kabupaten Purworejo has given overflow agregate supply with high quality standard. Thus, made us able to produce concrete's pad with high quality standard.

After laboratory tests at ITB and UGM, also on-site track tests at Lintas Solo - Yogyakarta, Petak Jalan Maguwo - Lempuyangan Km. 160+450, Yogyakarta, Departemen Perhubungan has issued certificate for production of concrete's pad for PT. Ragam usaha Prima Mandiri at March 19, 2004.