Ranney Collector Wells
Layne’s Ranney® Collector Wells group is committed to providing efficient designs to meet growing water supply needs now and into the future.
Radial Collector Wells
Radial collector wells provide cost effective access to ground water resources. Deployed in geologic settings where the subsurface materials are unconsolidated, they can develop water supplies from fresh or saline sources.
Water enters the system through the network of well screens and is collected in a reinforced concrete central shaft (caisson). The pumping station allows access for periodic inspections and maintenance. The caisson can be topped with a pump house or a flush grade top slab can be used to minimize visual impact.
Riverbank Filtration
When located neat a river, radial collector wells produce water through Riverbank Filtration (RBF). In this method, water is induced to infiltrate into local aquifers from a surface source. This slow infiltration process filters even microscopic particles from surface waters. This natural filtration removes particle at a lower cost than many conventional treatments.
Operational Advantages
Collector wells are constructed with longer lengths of well screens projected horizontally near the base of the aquifer formation. This results in lower entrance velocities through the screen which reduces the rate of plugging and extends the interval between well rehabilitation. Other advantages include:
- Higher yields reduce required number of wells and associated pipelines/electrical services
- Lower operating and maintenance costs
- Raised caisson offers flood protection
- Simple operator requirements
- Minimal property needs
- Minimal environmental impact and easier permitting than surface water intakes
