Collapsing Infrastructure - the Power of Concentrated Stormwater Runoff in Streams

 


April 28, 2011: Highly Exposed Sewer Pipe was identified
by AWS, in the Takoma Tributary of Sligo Creek in
Prince George’s County, Maryland.

 


August 9, 2011: This pipe was fine or there was no change

until this time.

 


August 17, 2011: A portion of concrete was peeled off.

 

Between the years 2004 and 2006, I walked across the northern part of the Anacostia watershed for hundreds miles of stream network system to identify environmental problems in stream channels such as eroded banks, exposed sewer pipes, fish migration barriers, etc., using a survey protocol called Stream Corridor Assessment Survey developed by Maryland Department of Natural Resources.  AWS has found so many problems in the stream channels and some severe problems were reported to authorities demanding repairs.

Among them was a highly exposed sewer pipe in the Takoma Tributary of Sligo Creek, which was reported to WSSC to protect it from a possible rupture.  WSSC then responded to me that they reinforced the pipe from the inside by lining it with sturdy plastic and the exposed pipe was structurally strong enough to bear the stream force.

I was puzzled to hear that the pipe was structurally sound and honestly doubted their explanation.  However, I am not a structural engineer then I decided to observe it.

The exposed pipe was discovered by AWS on April 28, 2004.

It was fine or there was almost no change until August 9, 2011.

However, on August 17, 2011 before Hurricane Irene, AWS discovered structural damages to the armoring part of the exposed pipe.  A portion of concrete was peeled off (shown above) and a large gabion basket (a basket of metal chain link that encases cobble size stones) was washed away downstream (shown below).  Gabion basket was lined next to the exposed pipe to protect it.

I am nervous seeing this change.

Though one may want to blame WSSC, WSSC is actually a victim of inadequate stormwater management policy.  It is the concentrated stormwater runoff that rushes into the stream and erodes/scours the stream bank and bed exposing the infrastructure.  Though WSSC needs to protect its infrastructure, we have to reduce the volume, velocity, and the frequency of such high flow events by infiltrating stormwater into the ground.


April 28, 2004: Situation of the exposed pipe at a distance
when it was discovered.

 


August 17, 2011: AWS discovered that the gabion basket
was washed away downstream.  Now the sewer pipe is
more vulnerable to stream force and in danger of rupture.

Comments

Reply to comment | anacostiaws.org

If you are going for best contents like I do, simply visit this web site all the time for the reason that it offers quality contents, thanks

Reply to comment | anacostiaws.org

Your method of telling the whole thing in this post is truly nice, every one be capable of easily understand it, Thanks a lot.

Reply to comment | anacostiaws.org

Hi, i think that i saw you visited my site thus i got here to return the desire?.I am trying to in finding issues to enhance my web site!I suppose its adequate to use some of your ideas!!

Collapsing Infrastructure - the Power of Concentrated

Wonderful blog! Do you have any tips and hints for aspiring writers? I'm hoping to start my own blog soon but I'm a little lost on everything. Would you recommend starting with a free platform like Wordpress or go for a paid option? There are so many choices out there that I'm completely overwhelmed .. Any ideas? Thanks!

Collapsing Infrastructure - the Power of Concentrated

I do agree with all of the concepts you have presented in your post. They are very convincing and will definitely work. Still, the posts are very brief for beginners. May you please extend them a little from next time? Thanks for the post.

Reply to comment | anacostiaws.org

Verry shoirtly this web site will bbe famous amid all blogging and site-building viewers, due to it's goiod posts

Collapsing Infrastructure - the Power of Concentrated

I am extremely impressed with your writing abilities and also with the layout in your weblog. Is that this a paid subject matter or did you modify it yourself? Either way stay up the excellent high quality writing, it's uncommon to look a nice blog like this one today..

Collapsing Infrastructure - the Power of Concentrated

I believe that is one of the so much vital information for me. And i am satisfied studying your article. But wanna remark on few basic issues, The site taste is perfect, the articles is really excellent : D. Excellent process, cheers

Collapsing Infrastructure - the Power of Concentrated

Thank you for the good writeup. It in truth was once a enjoyment account it. Glance advanced to far brought agreeable from you! However, how could we communicate?

Collapsing Infrastructure - the Power of Concentrated

Hi, I check your blogs on a regular basis. Your humoristic style is awesome, keep doing what you're doing!

Collapsing Infrastructure - the Power of Concentrated

I believe everything said was acdtually very reasonable. However, think about this, what if you added a little information? I ain't suggesting your information isn't good, however suppose you added a title to maybe get people's attention? I mean Collapsing Infrastructure - the Power of Concentrated Stormwater Runoff in Streams | anacostiaws.org is a little vanilla. You should peek at Yahoo's front page and see how they wrrite post headlines to get viewers interested. You might try adding a video or a picture orr twwo to get readers interested about what you've got to say. Just my opinion, it might make your website a luttle bit more interesting.

Reply to comment | anacostiaws.org

I pay a quick vusit each day a few websites and websites to read articles or reviews, however thus webste provides feature based posts.

Newsletter

 

Browse our newsletter archive to read articles previously published in our quarterly newsletter, Voice of the River!

Subscribe

Stay informed of the latest watershed issues by subscribing to our free email updates & event announcements.