Urban Hydrology Stormwater Management

Science Center Objects

Hydrogeologic reconnaissance, well inventory, and site-specific aquifer test data are needed in order for managers
to assess whether use of stormwater injection wells is technically or economically feasible for Class V underground
injection, file necessary permit applications, and begin the process of developing the necessary engineering design
specifications. Sanitation District No 1 requested that the USGS conduct scientific activities capable of supplying the utility with the needed hydrogeologic information.

Hydrogeologic reconnaissance, well inventory, and site-specific aquifer test data are needed in order for Sanitation District No 1 managers to assess whether use of stormwater injection wells is technically or economically feasible for Class V underground injection and begin the process of developing the necessary engineering design specifications. 

Project Objectives

The objectives of this project will be accomplished through four major approaches/tasks

  • complete a basic well inventory within the service area, particularly the combined sewer area
  • assess the structural integrity of identified wells
    • collect basic hydrologic characteristics
    • conduct specific capacity tests on accessible and applicable wells
  • compile existing information into a bibliographic reference
  • write a USGS Open-file report to present the findings

Current Knowledge

  • Groundwater use in Northern KY consists of little to none
  • Alluvial aquifer in Northern KY productive with thick sand and gravel layers, but interspersed with clay lenses
  • Original plan was to inject stormwater into bedrock
  • Performed well inventory to locate bedrock wells to test, found none
  • Found only one suitable sand and gravel well– Glier’s
  • Preliminary injection test at Glier’s
  • 50 gpm for 20 minute intervals
  • Hydraulic conductivity equaled17 ft/day, promising enough for further testing
Sections of Covington-Newport Alluvial Area Kentucky
Sections of the Covington-Newport Alluvial Area; Nonuniform geology (i.e. clay lenses) make it difficult to make generalizations across the area

 

Drilled 3 wells for further aquifer testing

  • Recently sampled for QW, found groundwater quality to be within standards of clean drinking water
  • Sanitation District No 1 Currently collecting stormwater for QW

 

Drilling new well for Northern Sanitation District No 1
Drilling of the new Bellevue well

 

 

Covington well site - Northern Sanitation District No 1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Technological or Other Hurdles

  • Potential fouling of screens in unsaturated zone may cause short life span for test wells
  • Collapse or filling in of Covington well

Related Work

  • currently collects continuous QW data in streams for SD1
  • Sediment Lab processes samples to calculate suspended sediment concentrations in stormwater runoff

 

Ludlow well - Northern Sanitation District No 1

 

 

 

 

 

 

 

 

 

 

 

 

Take-Aways/Final Thoughts

  • Great opportunity to provide data that has not existed until now, to inform the USEPA Region 4 and other cooperators about the potential for stormwater injection wells throughout the region
  • Good chance to characterize this part of the Ohio River alluvial aquifer, since little to no current data exist

 

Mike Unthank measuring Glier's well - Northern Sanitation District No 1
USGS staff (Mike Unthank) measuring Glier's well