My WebLink
|
Help
|
About
|
Sign Out
Home
Browse
Search
WSP10013
CWCB
>
Water Supply Protection
>
Backfile
>
9001-10000
>
WSP10013
Metadata
Thumbnails
Annotations
Entry Properties
Last modified
7/29/2009 9:42:37 PM
Creation date
10/12/2006 4:04:26 AM
Metadata
Fields
Template:
Water Supply Protection
File Number
8040.500
Description
Section D General Studies - Ground Water
Date
7/1/1999
Author
SDU, BOR, USEPA,USGA
Title
High Plains States Ground Water Publications - Huron Recharge Demonstration Project Summary
Water Supply Pro - Doc Type
Report/Study
There are no annotations on this page.
Document management portal powered by Laserfiche WebLink 9 © 1998-2015
Laserfiche.
All rights reserved.
/
18
PDF
Print
Pages to print
Enter page numbers and/or page ranges separated by commas. For example, 1,3,5-12.
After downloading, print the document using a PDF reader (e.g. Adobe Reader).
Show annotations
View images
View plain text
<br />UUJilh <br /> <br />e <br /> <br />Recharge Method <br /> <br />The project used a 24-inch-diameter injection well with a 6-inch gravel pack surrounding <br />the weIl and screen for recharge. Construction on the injection well began with placing a <br />3-foot-diameter shaft and using reverse rotary drilling. Drilling through the upper 40 feet <br />of glacial tiIl materials encountered large rocks and boulders; therefore, the weIl was moved <br />twice from the planned location. The total length of the well is 77 feet, with the lower <br />20 feet screened with 70 slot-welded stainless steel screen (figure 5). A pipeline 950 feet <br />long of 8-inch-diameter polyvinyl chloride pipe connected the recharge well to the existing <br />pipeline running from the well field to the City of Huron's water treatment plant. A <br />backflow preventer /valve station was constructed near the water treatment plant to allow <br />treated (potable) water to flow to the well field through the existing 15-inch raw water <br />transmission line. <br /> <br />The injection well used a 4-inch-diameter injector pipe with 361!2-haH-inch diameter holes <br />drilled in the lower 4 feet of the pipe. This injector pipe was placed inside the 24-inch- <br />diameter injection well. A submersible lO-horsepower electric motor was also placed in the <br />injection well to allow its use as a pumping well, thereby configuring it as an aquifer <br />storage and recovery well. An extensive piping network was installed inside the well house <br />to allow injection or pumping, monitoring of flow rates and water pressure, and easy <br />sampling of the water. <br /> <br />. <br /> <br />Economic Analysis <br /> <br />The original cooperative agreement for the project was signed on April 27, 1990, and <br />authorized a total budget of $1,677,114. This amount included pre-agreement costs of <br />$107,513 and Federal administrative costs of $80,054. The sponsor's cost share was <br />20 percent of the total proiect costs. Later, the Federal administrative costs increased to <br />$133,544, bringing the total project budget to $1,730,604. <br /> <br />As this was a demonstration project, the cost of recharging based on the amount of water <br />actually recharged was high-about $31,500 per acre-foot. In production, the costs would be <br />a small fraction of the demonstration costs since the technique has been proven. As an <br />example, if a production well were to recharge for a 4-month recharge season at 500 gpm, <br />the cost of recharging, including well installation costs amortized over 20 years and annual <br />operation and maintenance costs, drops to an estimated $97 per acre-foot. Included in this <br />are the treatment costs for the water to be brought to primary drinking water standards. <br />Some of these costs would be recouped when the water is recovered-as the recovered <br />water requires significantly less treatment than the pre-recharge water, thus saving water <br />treatment costs. <br /> <br />Summary of Water Level and Water Quality Monitoring Program <br /> <br />. <br /> <br />The target aquifer for this recharge project is a primary drinking water source for the City of <br />Huron and nearby rural home sites. Accordingly, the water quality monitoring program <br /> <br />9 <br />
The URL can be used to link to this page
Your browser does not support the video tag.