Bedrock Cleaning

One of the very important stages in gold placering has to do with the cleaning of the bedrock. If the surface is fractured, soft or is not even, it can turn into a very difficult job. When the bedrock is soft and cracked it can cause the gold particles to get imbedded a few feet down therefore it is not a good idea to excavate this sort of bedrock material for the content of gold it might have. In most cases it is ideal to clean the bedrock as the rock progresses up the stream. Cleaning the surface one more time might be left until the end of the season when there is enough time to deal with this activity and when there is not a lot of water for other work. In places where the bedrock is hard it is better to clean it out a good deal by hand and the softer seams to cracks without a doubt should be cleaned out with a hand tool. Having a small pump and a hose is something that is nearly necessary in order to do a good cleanup. In some occasions having a separate sluice box that is smaller in size than the one that is used for operation, can be put into use for handling materials from a clean up operation.

Special conditions
Dry washers are well known of and have been used for a good number of years in the southwestern area of the United States where there is not a great amount of water, mainly in areas such as New Mexico where a few millions of dollars of gold has been obtained from dry washing. There are several districts that can be mentioned that are amongst those that had a considerable amount of gold such as Cerrillos, Hillsborough, etc. During the time of the Depression in the thirties, there were a lot of men that used dry washers and were successful in their find in areas such as Arizona, Nevada, and Southern California. A good quantity of gold had been found in Australia as well by using these sorts of methods. In placers where there has not been any action of the water is different from the ones that are in the more usual places given that there is a lack of pebbles that have been rounded by the water. The gold in these places is also different as it is more angular and rougher, and shows that it has traveled a shorter distance from its lode. In a lot of occasions the gold bearing ground is stuck together wit lime or iron oxide that needs to be broken up before the yellow scatterings can be retrieved. One good place to look are dry stream beds, even though in the more arid areas the metal can sometimes be found in an area it has been washed down and deposited by a burst of clouds that is not frequent. Whatever the case, the richness for every yard of a dry placer needs to be distinctly better than that of the creek bank or bar for a few different reasons: better living costs, recoveries that are more costly, and given that in most cases less of the gold is secured than would occur with the typical sluiceway, even though the conditions are right the reclamation of coarse gold can be very thorough. If the gravel is going to be treated the correct way through dry washing, it needs to be totally dry as well as disintegrated. If there has been a rainstorm for instance, the operations need to stop until the ground is not as wet anymore. Even in places where there are very dry climates, the gravel is still a little bit damp right under the surface and needs to be dried out before it can be treated in a dry washer. If the material is to be spread out in the sun or placed through driers, it will only add more to the mining expenses. In the case of small scale mining though, usually the gravel dries just as quickly as it can be treated.