Memorandum

City of Lawrence

Utilities Department

 

TO:

 

David Corliss – City Manager

Cynthia Boecker, Assistant City Manager

Diane Stoddard, Assistant City Manager

FROM:

Bob Brower- Wastewater Field Operations Manager

CC:

Dave Wagner – Director of Utilities

David E. Cox – Assistant Director Utilities - Operations

Alan Landis – Purchasing

Date:

March 14, 2008

RE:

April 01, 2008 City Commission Agenda

Chemical Root Control Project

 

Please include the following item on the City Commission consent agenda for consideration at the April 01, 2008 meeting.

 

Renew contract with Duke’s Root Control Inc. for the 2008 Sanitary Sewer Chemical Root Control Program

 

History:

 

The purpose of the project is to apply chemical root control agent to sanitary sewers, in order to kill the root growth present in the lines and to inhibit re‑growth, without permanently damaging the vegetation producing the roots.

 

The Utility Department began the Chemical Root Control program in 1998. The treated sanitary sewer line segments have a 2-year warranty against root re-growth. The vendor will re-apply treatment if roots re-grow in the line during the warranty period at no additional cost to the city. The selected sanitary sewer line segments in each year’s project are retreated every 3rd year as part of the Root Control Program.

 

Sanitary sewer line segments are selected for root control on the basis of several factors.  These factors include:

 

·          Blockages caused by root infiltration

·         TV inspection

·         Maintenance records

·         Age of pipe

·         Pipe material

 

 

 

 

 

On July 12, 2005 bids were opened for the 2005 Root Control Program.  The vendors also bid on costs for 2nd and 3rd year contract renewal. Duke’s Root Control Inc. was the low bidder in 2005 and has agreed to extend pricing from previous years to a 2008 contract. Rather than re-bidding this service in 2008, staff recommends accepting the extended pricing arrangment. Below is the cost table submitted by Duke’s Root Control Inc.

 

PIPE SIZE

2005 UNIT PRICE PER LINEAR FOOT

2006 UNIT PRICE PER LINEAR FOOT

2007 UNIT PRICE PER LINEAR FOOT

2008 UNIT PRICE PER LINEAR FOOT

8 inch

$0.99

$1.29

$1.29

$1.29

10 inch

$1.76

$1.76

$1.76

$1.76

12 inch

$1.92

$1.92

$1.92

$1.92

15 inch

$2.73

$2.73

$2.73

$2.73

18 inch

$3.97

$3.97

$3.97

$3.97

24 inch

$6.35

$6.35

$6.35

$6.35

 

 

 

Project Status:

The 2007 Chemical Root Control program was completed in August of 2007.  The results were satisfactory and the Utilities Department wishes to renew the contract with Duke’s Root Control Inc. for the 2008 work. A total of 75,478 lineal feet/14.30 miles of 8” inch and 12” inch sanitary sewer pipe has been identified for root control at a projected cost of $99,281.82.  A list of locations is attached.

 

 

Project Funding:

Funding for the 2008 Root Control Program will come from the Utility Department Sewer Maintenance fund, 7410-2538. Budgeted amount: $100,000.00

 

Action Request:

Utility Department staff requests approval from the City Commission to authorize the City Manager to execute a contract agreement and purchase order with Duke’s Root Control Inc. in the amount of $99,281.82 to complete the 2008 Chemical Root Control Program.

 

 

Thank you for your assistance.  Please advise if you have any questions.

 

 

 

 

 

 

2008 Root Control

 

 

 

 

 

US MH

DS MH

LOCATION

PIPE DIA.

FEET

 COST

NE051320-207

 NE051320-206

1505 Harper

8

185

 $       238.65

NE051320-208

 NE051320-207

1521 Harper

8

268

 $       345.72

NE051320-209

 NE051320-208

1541 Harper

8

301

 $       388.29

NE051320-210

 NE051320-209

1623 Harper

8

391

 $       504.39

NE051320-211

 NE051320-210

1629 Harper

8

97

 $       125.13

NE051320-212

 NE051320-213

1621 Powers

8

92

 $       118.68

NE051320-213

 NE051320-214

1543 Powers

8

383

 $       494.07

NE051320-214

 NE051320-215

1519 Powers

8

393

 $       506.97

NE051320-215

 NE051320-216

1508 Powers

8

176

 $       227.04

NE051320-216

 NE051320-207

1508 Powers

8

260

 $       335.40

NE051320-219

 NE051320-218

1515 Craig Court

8

255

 $       328.95

NE101319-134

 NE101319-131

3506 W. 25th Terr

8

160

 $       206.40

NE101319-135

 NE101319-134

3506 W. 25th Terr

8

275

 $       354.75

NE101319-136

 NE101319-134

3418 W. 25th Terr

8

145

 $       187.05

NE101319-137

 NE101319-136

3406 W. 25th Terr

8

234

 $       301.86

NE101319-138

 NE101319-137

2421 Lazy Brook Ln.

8

359

 $       463.11

NE101319-139

 NE101319-138

2411 Lazy Brook Ln.

8

137

 $       176.73

NE121319-011

 NE121319-010

2429 Arkansas

8

242

 $       312.18

NE121319-012

 NE121319-011

2435 Arkansas

8

170

 $       219.30

NE121319-013

 NE121319-012

2465 Arkansas

8

394

 $       508.26

NE341219-005

 NE341219-004

3502 W. 8th Ct.

8

233

 $       300.57

NE341219-007

 NE341219-006

3506 W. 9th Ct.

8

223

 $       287.67

NE341219-009

 NE341219-008

3520 W. 10th

8

350

 $       451.50

NE341219-010

 NE341219-009

3515 W. 8th Ct.

8

400

 $       516.00

NE341219-011

 NE341219-010

3514 W. 7th Court

8

400

 $       516.00

NE341219-016

 NE341219-015

3520 Yale Rd.

8

399

 $       514.71

NE341219-017

 NE341219-016

3606 Yale Rd.

8

178

 $       229.62

NE341219-020

 NE341219-019

3501Yale Rd.

8

124

 $       159.96

NE341219-021

 NE341219-020

3511 Yale Rd.

8

211

 $       272.19

NW051320-033

 NW051320-034

1809 Brook

8

375

 $       483.75

NW051320-034

 NW051320-035

1711 Brook

8

401

 $       517.29

NW051320-034

 NW051320-036

1712 Brook

8

145

 $       187.05

NW051320-036

 NW051320-037

1708 Brook