48" DR 21/17 Main Water Intake Pipe

When the old stave wood line, which acted as the main water intake line, needed to be replaced, HDPE was the only logical solution. The water intake for St-Laurent Paperboard and the town of LaTuque was originally made from British Columbia Fir. This wood stave line, which in some cases was over 100 years old, required constant maintenance.

HDPE was chosen due to its flexibility over rough terrain and its butt fused, leak-proof joints, virtually eliminating maintenance. These were the two main concerns of the mill and city council.

There are two main sections of the pipe left after this 1999 project is completed. This will bring the total linear feet of HDPE pipe installed in this "Paper Town" to 52,000 feet.

HDPE Pipe Watermain Reline

High density polyethylene (HDPE) pipe enabled the Region of Ottawa - Carleton to save time and money during the restoration of a deteriorating 915mm (36") diameter cast iron watermain. During the summer of 1999, the 82-year-old cast iron watermain under Gloucester Street (one of the busiest streets in downtown Ottawa) was sliplined with HDPE pipe, instead of using traditional open-cut construction.

HDPE was the pipe material of choice for its superior abrasion resistance and flexibility to negotiate minor bends during the trenchless sliplining installation. The watermain rehabilitation project utilized approximately 1,500 meters of 33" DR 17 HDPE pipe. The pipe was grouted in-place and is expected to have a service life in excess of 50 years, based on a study performed by National Research Council of Canada.

HDPE Pipe and HDD Solves Sanitary Sewer Back-up Problem

The City of Calgary was faced with a challenge: they needed to provide an additional wastewater siphon across the Bow River to eliminate the frequent sewer backups that occurred during their heavy rainfalls. CH2M Hill and others looked at a variety of construction options and eventually decided on HDD using HDPE pipe due to the project constraints and the minimal environmental impact it would have on the project site.

The project utilized approximately 1,650 feet of 30" DR 9 HDPE pipe that met the criteria for pullback with the ability to bend and to withstand the stresses of HDD.

A Part of the Deep Lake Water Cooling Solution for Toronto

The City of Toronto sits on the shore of deep, cold Lake Ontario. The new 1,600 mm HDPE pipe intake line installed in June, July and August of 2003 allows 4°C water to be drawn from a depth of 83 meters.

This renewable source of naturally chilled water serves a dual purpose. Firstly, in cooling 20 million square feet of city core office buildings, reducing greenhouse gases by 40,000 tons per year, thus helping to eliminate mid-summer smog. Secondly, in providing the city and residents with cleaner drinking water at no extra cost to the taxpayer.

HDPE pipe was selected for this innovative project due to its corrosion resistance and resistance to zebra mussel fouling. Additionally, it can be butt fused into long flexible lengths and floated into position for a simplified and quicker installation.

96" and 120" Storm Drain Installation

PROJECT

Nas Lemoore Family Housing

LOCATION

Lemoore, California

OWNER

United States Navy

APPLICATION

96" and 120" Storm Drain

CONTRACTOR

Mountain Cascade Construction

The Lemoore Naval Air Station, situated in Lemoore, California required the upgrading of an 84" diameter corrugated metal pipe designed to drain an area used exclusively for housing. Reinforced concrete pipe, cast-in-place pipe and Weholite were considered as options. Weholite was selected due to the reduced costs associated with handling and installation. The project consisted of 1,120 feet of 120" and 960 feet of 96" Weholite lightweight polyethylene pipe. The pipes were delivered to the jobsite in 40 foot lengths and joined with Weholite flexible couplings. The 40 foot lengths of 120" Weholite are the largest HDPE pipe joints installed anywhere in the world.

Storm Drain Rehabilitation

30" New Storm Sewer Line

The lower mainland of British Columbia is home to some exceptionally challenging terrain with much of it extremely wet. When the Fraser Valley Regional District needed to install a new Storm Sewer they turned to 30" Weholite HDPE as the material of choice.

Traditionally concrete pipe was used for storm sewers of this size. However limited access, wet ground conditions and privately owned agricultural land posed the largest challenges. Each length of concrete pipe and all of the bedding required to support it would have to be carried across this difficult terrain.

Weholite due to its light weight, exceptional pipe stiffness, and smooth inner surface was chosen for the task. The district was able to minimize site remediation costs, use native material for backfill and maintain the same flow as 36" concrete pipe while maximizing ground cover. Based on the significant cost savings in material and installation the district is now considering using HDPE pipe in an increasing number of new sewer installations.

42" Highway Culvert Rehabilitation

In September 1997, Excavation Raymond Berube along with KWH Pipe and their exclusive Quebec distributor, Marcel Baril Ltee convinced the Department of Transportation to use Weholite to reline one of the failing CSP culverts under Hwy. 640. The original tender called for the excavation and replacement of 500 feet of 54" CSP. With the amount of traffic on this highway, and a 30 foot cut, the project was estimated to take 5 to 6 weeks to complete.

42" Weholite pipe due to its superior flow characteristics and high pipe stiffness was selected. 20 foot lengths were chosen and were joined using KWH's Thread-Loc joining method. Using only one excavator the 500 feet of culvert was pushed into position and grouted in two days. Since then, the MTQ has "certified" Weholite for use on all their culvert rehabilitation projects.

Culvert Reline Under Canada's Busiest Highway

Highway 401 (Macdonald-Cartier Freeway), is Canada's busiest highway. The roadway collapsed causing massive traffic jams for several days, when a sinkhole washout occurred due to the corrosion of an existing CMP culvert. After initial temporary repairs were completed, Ontario's Ministry of Transportation selected Weholite HDPE pipe to reline the existing culvert. The project involved the installation of 300 feet of 21" pipe, and included grouting to stabilize the culvert bedding and backfill. The pipe joints were sealed with Wehoseal prior to grouting.

All work was completed within two working days without traffic disruption.