Navigation Sector
All the previously described systems (dredging and washing) goes set up on top of a vessel better known as a raft, which is made up of two boats or canoes placed in parallel and over which a wooden plank is placed as a floor. The surface of this floor is variable, depending on the length and capacity of the load of the boats (on average a raft has an area of 8 meters x 76 meters). The raft has roofing and in order for them to move in the river they are provided with stationary motors of 36 HP or they are towed with auxiliary canoes that have motors on the shore of 55 HP.
Personnel
The personnel that operates a dredging unit is basically composed by three scuba divers, the administrator or the owner of the raft. In practice the ones that control the whole operation (dredging and washing) are the scuba divers, which take three hour shifts scuba diving. The owner mainly supervises the refining process, amalgamation etc. In our judgement in order for an operation to be carried out adequately it would require of the following personnel:
- One administrator (owner)
- One motor mechanic
- One cook
- Three scuba divers
Costs of operation
The owners of the dredges do not have control over their operative costs, factor that along with the lack of knowledge of the volume of material that has been processed, does not allow us to calculate the unitary cost of the operation. However, referentially and based on the information that has been obtained in the terrain, the calculus of the monthly cost the operation will demand of one dredging unit of 6 inches will need to be calculated. On the other hand if the technical parameters are considered, for the outcome of a pump of 6 inches and taking on an average efficiency of 6 m3 per hour, another working day of 9 hours and 25 days of operation would be available.
|
