THE EVOLUTION AND AMELIORATION OF A MAJOR FLOOD PLAIN DRAINAGE PROBLEM

The development is described of a drainage system for which 1970 studies reported ground water between the elevations 387 and 389. In early 1973 the level had risen to 395, and in 1974 to 400. New flow nets were developed for this elevation and an implied inflow of roughly 4 million gallons of water per day. An alternate dewatering scheme consisting of a series of deep wells pulling water from an aquifer was planned; this would provide protection through a range of hydraulic heads should the ground water continue to rise. A deep test well and series piezometers were installed. Estimates indicated an evantual water table elevation of 410. An 8-well pumping system was ultimately selected, plus two additional standby wells. Comments are made on the drawdown, the pumping rate, the required production of the 8-well system, the design of the well screen, and the costs of the drainage system.

• Corporate Authors:

  Federal Highway Administration

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590
• Authors:
  • Benson, G R
• Publication Date: 1976-12

Media Info

• Features: Figures;
• Pagination: p. 52-64
• Serial:
  • Highway Focus
  • Volume: 8
  • Issue Number: 4

Subject/Index Terms

• TRT Terms: Costs; Dewatering; Drainage structures; Flood plains; Flow net; Groundwater; Water table; Wells
• Old TRIS Terms: Drainage systems; Groundwater level
• Subject Areas: Bridges and other structures; Finance; Geotechnology; Highways; Hydraulics and Hydrology;

Filing Info

• Accession Number: 00148214
• Record Type: Publication
• Files: TRIS, USDOT
• Created Date: Mar 15 1977 12:00AM