In 1985, a total of 1,600 water main breaks were recorded on Edmonton, Alberta's
758 miles of cast iron pipe resulting in significant inconvenience to many
customers and high maintenance costs. At that time, a Cast Iron Water Main
Replacement program was initiated. By the end of 1997, the annual number of water
main breaks had decreased to 489 on a cast iron distribution system length of
approximately 544 miles. In the early 1990s, the water utility began the shift
from a reactive to a proactive approach to managing the remaining cast iron pipe
network. While continuing to replace pipe, alternative technologies such as
cathodic protection are now applied to some pipe to reduce the rate of
deterioration. Non-destructive testing using the Hydroscope tool for the
evaluation of pipe wall condition is also utilized by the utility. Hydroscope
provides information on the pipe wall condition and improves the reliability of
decisions made in the management of the cast iron infrastructure. This paper
discusses Edmonton's use of these new technologies to optimize the management of
cast iron pipes. Includes 10 references, figures.
| Edition : | Vol. - No. |
| File Size : | 1
file
, 310 KB |
| Note : | This product is unavailable in Ukraine, Russia, Belarus |
| Number of Pages : | 14 |
| Published : | 01/01/2000 |
