Test­ing will pre­cede grout project

Daily Freeman (Kingston, NY) - - LOCAL NEWS - By Paul Kirby pkirby@free­manon­line.com paulat­free­man on Twit­ter

Grout re­moval from the Wash­ing­ton Avenue tun­nel will not be­gin un­til a “sim­u­lated” test is con­ducted at a dis­tant site, ac­cord­ing to city en­gi­neer.

Ralph Swen­son said the sim­u­lated hy­draulic/water jet test is ex­pected to be con­ducted even be­fore plans are drawn up by a con­sul­tant for the spe­cific re­moval of the grout caus­ing block­age in the tun­nel.

Swen­son said that the test will be done to “see if the process works ... be­fore we go out to bid on the ac­tual [work].”

On Nov. 2, the Com­mon Coun­cil voted 8-0 to bor­row $150,000 to pay for the design of a project to re­move grout that’s block­ing the Wash­ing­ton Avenue san­i­tary sewer sys­tem, as well as to fund on­go­ing rental fees for a pump sys­tem to tem­po­rar­ily by­pass the clogged sec­tion of pipe. The design is ex­pected to be drawn up by the en­gi­neer­ing firm Clark Pat­ter­son Lee.

Of the fund­ing, $100,000 is to pay for de­sign­ing the re­pair project, which would use a high-pres­sure water jet with a ro­tary cut­ting tool to re­move the grout. It also would pay to so­licit bids from com­pa­nies that could per­form the re­pair project, which is ex­pected to cost more than $1 mil­lion.

The re­main­ing $50,000 would be used to pay for the by­pass pump­ing sys­tem.

The grout block­age oc­curred dur­ing the project to re­pair the sink­hole that opened on Wash­ing­ton Avenue in April 2011. Dur­ing the re­pair, grout some­how pen­e­trated a new sewer lin­ing, block­ing a por­tion of the pipe.

Ti­mothy Moot, a prin­ci­pal with Clark Pat­ter­son Lee, told the Com­mon Coun­cil’s Fi­nance and Au­dit Com­mit­tee last month that the high-pres­sure jet re­pair was one of sev­eral op­tions his firm ex­plored and that it prob­a­bly will cost be­tween $1.1 mil­lion and $1.3 mil­lion.

The city pre­vi­ously tried to jet the grout out of the pipe but did so from a greater dis­tance than now is be­ing pro­posed, Moot said. He said the closer the equip­ment is to the block­age, the more pres­sure can be gen­er­ated.

Swen­son has told the Fi­nance and Au­dit Com­mit­tee that it costs the city about $7,250 per month to rent the by­pass pump. And he said money the coun­cil pre­vi­ously ap­proved for the rental is nearly ex­hausted.

Newspapers in English

Newspapers from USA

© PressReader. All rights reserved.