We are investigating the feasibility of replacing the Perkins Row vacuum wellfield with a series of gravel-packed wells to improve the station's efficiency and reduce the risk of contamination. The current supply system uses a vacuum to extract water from the wells and any leaks in the manifold system can introduce contamination. Water from a gravel-packed well with a submersible pump is under pressure so if a leak develops water is forced out rather than contamination being drawn into the well.
The current phase of the project involves drilling several test wells, evaluating the soils and conducting some pump tests. Estimates of well yield and construction costs will be developed based on the results of these tests. Tests conducted during the summer of 2011 indicate that our current wells do not use the whole aquifer and there is an additional 15 feet of sand and gravel below our existing wells.
This project is on hold until the final design of the water treatment plant. Pump selection for the new wells depends on needed flow and pressure for plant operation which could be quite different than our current needs. Rather than replace new pumps that don't meet new requirements we will delay this project until the plant is designed.
| Next > |
|---|
