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Outfall Shorezone Protection
T. Butler
Posted: Wednesday, March 17, 2010 10:53 AM
Joined: 3/17/2010
Posts: 2


Erosion is wearing on our ocean shoreline and plans are in development to implement a riprap detail along the coast.  Our outfall cover has been reduced and we need a method of preventing erosion but also do not want to place heavy riprap over the top of our outfall because of forces associated with suspending riprap and subsequent point load on the pipe. Can anyone share experience with this type of situation and remedies?  We are in the process of (very carefully) exposing the outfall to verify depth which could have in the range of four to six feet of cover at this time.


Jeff Naumann
Posted: Wednesday, March 17, 2010 12:14 PM
Joined: 3/11/2010
Posts: 7


T. Butler wrote:

Erosion is wearing on our ocean shoreline and plans are in development to implement a riprap detail along the coast.  Our outfall cover has been reduced and we need a method of preventing erosion but also do not want to place heavy riprap over the top of our outfall because of forces associated with suspending riprap and subsequent point load on the pipe. Can anyone share experience with this type of situation and remedies?  We are in the process of (very carefully) exposing the outfall to verify depth which could have in the range of four to six feet of cover at this time.


I don't think that you will get much experience with ocean outfalls on this pretty dead forum.  Contact one or more of the sewage agencies along the US coastline.  I'm in Southern California, where there are several large agencies with many decades of experience:  Los Angeles County Sanitation, City of Los Angeles Sanitation, Orange County San., The City of San Diego, etc.  Their outfalls are all in deep water, subject to whatever nature can through at them.