Addressing Karst Geology
Addressing Karst Geology
The original Hart Farms development plan included a two cell wet pond to provide water quality treatment and rate control. However the pond did not function as intended, and caused environmental & aesthetic concerns. EOR determined that, in addition to the pond's improper construction, the area's Karst bedrock layers caused significant exfiltration. The project was divided into two phases: identification/analysis and design.
Phase-1 - Determined the causes of the pond's condition, identified solutions, and analyzed the associated costs, benefits, and risks. Also evaluated were the Karst-specific issues: groundwater contamination, sinkhole formation, & reduced water quality treatment effectiveness.
Phase-2 - The design of a filtration retrofit that to reduce the Karst-related risks. Water quality and quantity parameters are maintained by basin shaping, outlet modification, and the inclusion of iron-filings in the filtration media.
Client Benefits
- The shallower filtration design will provide the required water quality treatment & rate control, while addressing the Karst bedrock infiltration concerns.
- Reduced bounce, naturally contoured shoreline, and native vegetation establishment will transform pond into an amenity.
Related Projects
Athletic Field Water Reuse
Retrofit system saves School District several thousands of dollars per year in irrigation costs while contributing to improved water quality for nearby lake.
Bixby Park Wetland
Wetland restoration reduced phosphorus loading and improved water quality in Parley Lake.
Watershed District Web Mapping
Use of open-source technology in customizing spatial data for improved accessibility for District and public use.