The search for a couple, who disappeared in remote bushland in Western Australia 13 days ago, has continued with police searching disused mine shafts up to 20 metres deep. Jennie Anne Kehlet, 49, and Raymond Keith Kehlet, 47, were last seen on March 22 in an area called Table Top near the gold prospecting and mining town of Sandstone, some 730km north east of Perth. The couple are understood to be amateur prospectors and had set up a well-stocked campsite about 30km south of Sandstone in remote bushland which is popular amongst gold prospectors, Inspector Scott Morrissey told the ABC. Jennie Anne Kehlet, 49, and Raymond Keith Kehlet, 47, were last seen on March 22 in an area called Table Top near the gold prospecting and mining town of Sandstone, some 730km north east of Perth . 'It is tough, remote — it's virgin bushland, it varies from very rocky to sandy, there's some undulating countryside,' he said. Inspector Morrissey added that the Kehlet's campsite was intact, with their two vehicles, trailers and four-wheel drive quad bike parked at the site were also unharmed. Police are focusing on a search area of 10 square kilometres, however a search aircraft with forward looking infrared equipment has examined an area of 625 square kilometres so far. No trace of the duo has been found. Police are focusing on a search area of 10 square kilometres, however a search aircraft with forward looking infrared (FLIR) equipment has examined an area of 625 square kilometres so far . 'The major hazard out there is there's numerous old mine diggings or mine shafts, and yesterday we cleared 33 of those with specialist personnel from SES in Kalbarri and DFES personnel in Perth,' Inspector Morrissey told the ABC. 'Those mine shafts range from 3 metres to 20 metres.' It is unclear how many more mines will need to be searched or how well provisioned the missing couple are. Inspector Morrissey said police were hopeful but had prepared the Kehlet's family 'to expect a poor outcome'. 'The major hazard out there is there's numerous old mine diggings or mine shafts, and yesterday we cleared 33 of those with specialist personnel from SES in Kalbarri and DFES personnel in Perth,' Inspector Scott Morrissey said . Jennie is described as fair skinned, with a medium build, approximately 157cms tall, with brown hair and green eyes. Jennie was last seen wearing a yellow florescent coloured work shirt and Raymond was wearing all blue. Raymond is described as fair skinned, with a medium build, approximately 170cms tall, with brown hair and blue eyes. Police urge anyone with any information regarding the couple to them on 131 444 or Crime Stoppers on 1800 333 000.
Jennie, 47, and Raymond Kehlet, 49, were last seen on March 22 .
Their campsite and vehicles were found intact in remote WA bushland .
Police have begun to search old mine shafts, some up to 20 metres deep .
Search aircraft with infrared equipment have examined an area of 625 square kilometres, however no trace of the couple has been found .