Coffey phone Unit 23, 46 Great Eastern Hwy Kalgoorlie, Western Australia 6430 map Coffey Geotechnics Pty Ltd phone Unit 1/ 8 Pauley Cct Kalgoorlie, Western Australia 6430 map if (!IN_DEV) { ?> } ?> GR Engineering Services phone 45 Brookman St Kalgoorlie, Western Australia 6430 map