Sewer Rehabilitation Project

Castle Rock Water staff identifies sewer pipes for rehabilitation based on a history of root intrusion, increased annual maintenance and pipe defects identified by closed circuit televised (CCTV) inspection. Sewer pipes with capacity issues are also identified as candidates for replacement with larger pipes. Engineering staff develops plans for rehabilitation based on the severity of the defects found.

Cracked sewer pipes can often be repaired from within by pulling a new liner through the sewer pipe. The in-situ method of cured-in-place pipe (CIPP) lining has been in practice since the 1970’s and involves pulling a resin-saturated felt tube into the damaged sewer pipe. The tube is then expanded and cured into a new tight-fitting, joint-less pipe within the existing sewer pipe. CIPP lining can extend the service life of sewer pipes by 50-75 years. Rehabilitation by the installation of a CIPP liner, before the sewer pipe deteriorates is cost-effective, and can be completed with minimal disruption to service and results in less future maintenance. 

Severe sewer pipe defects and undersized pipes must be dug-up and exposed in order to complete the repairs. When completed on short sections of pipe, these are referred to as "open-cut point repairs." Sometimes a few critical open-cut point repairs must be completed in advance of CIPP lining a long stretch of sewer pipe.  

Projects

Young America neighborhood

In spring 2020, Castle Rock Water is rehabilitating clay pipes in the Young American neighborhood. The sewer pipes in this neighborhood were installed in the 1970s and are exhibiting severe cracking, joint separation, and root intrusion. In late 2019, the Town contracted with Insituform Technologies to construct CIPP lining of over 2 miles of pipe in the neighborhood at a contract price of $300,962.60. Project construction will begin in March with completion by May 2020.

Past rehabilitation

Past rehabilitation
2016Castle North neighborhood
2014Castle North and parts of Downtown
2013Glovers neighborhood


Program cost

The actual cost of this program varies from year-to-year, but $350,000 is budgeted annually.

More information

Residents are advised to contact Castle Rock Water with any concerns or questions.