The proposed amendment below has not been implemented. The Ad Hoc Committee on Large Diameter Water Mains is currently reviewing possible design manual changes. See the Ad Hoc Committee on Large Diameter Water Mains page for current information.
The proposed changes to portions of the Pipeline Design Manual are under review by the Commission.In addition to the review, current developer plans with notes attached indicating they would be subject to those changes, if enacted, will NOT be subject to any changes.
The proposed changes would establish an 80-foot setback from specific large diameter water mains. This would provide an extra layer of protection to reduce risks to public safety and complement our more frequent and state-of-the-art inspections, monitoring and repairs of large water transmission lines.
2012 Proposed Amendment
Below are links to a position paper and presentation. You’ll find both current and proposed language at the end of the position paper or you may view them directly under Part V - Design Manual Amendment
Position Paper and Proposed Design Manual Amendment - (80 foot setback) [Complete pdf; 84 pgs; 3.81MB]
Presentation on Need for 80 foot setback (ppt; 24.3 MB)
2011 Proposed Amendment (Original)
Part Three (common), 2&3