Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here


Permanent pool of pond extends way up into inlet pipe

Permanent pool of pond extends way up into inlet pipe

Permanent pool of pond extends way up into inlet pipe

Fl and county just 4 laned road by me.

If permanent pool of wet detention pond extends way back into the inlet pipe..... inlet pipe of Pond 1 for SR 415 is 2.2 ft submerged always. It's top elev is 5.5 ft (invert is at 6 inches and pipe is 5 ft diam) and permanent pool elev is 8.7.

I believe a backwater is created in the inlet pipe up to the 8.7 ft elevation... way upstream in the pipes feeding this pond.

I think, this is HUGE problem cause flat inlet drain on SR 415 S side has 54 in or 4.5 ft inlet pipe whose invert is ONLY 3 ft, thus top of pipe is 7.5.

This pipe is thus ALWAYS full due to perm pool elevation of pond 1. When design storm of 8.6 in in 24 hrs hits.... this pipe will not be able to handle all the inflows due to high tailwater induced by pond perm pool.

Issues: water stagnates in inlet pipe, breeds mosquitoes (zika and other dangers); drainage from SR 415 will NOT work properly due to high tailwater behind curb inlets..... pipes close to pond are 100% full for quite a distance BACK from pond (due to backwater of the perm pool.)

And the design calculations reports did NOT state that they addressed a high tailwater condition for the pipes close to pond 1 or inlet pipe of same pond.

I think there will be slow/little drainage in some curb inlets and high risk of hydroplaning.

They reused a borrow pit for pond 1 should have put it further N at higher elevation and used exfiltration trenches in low spots near Reed Ellis rd like they did in flood plain of river.

I suspect under 25yr/24 hr storm water may bubble up out of some flat inlets on side of sr 415.

Am I off mark...... what other issues are there..... scour on pond bottom and turbidity? thanx, john

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members! Already a Member? Login


White Paper - Considerations for choosing a 3D printing technology
The adoption of 3D printing into major companies’ product development life cycles is a testament to the technology’s incredible benefits to consumers, designers, engineers and manufacturers. While traditional production methods have limitations in manufacturability, 3D printing provides unparalleled design freedom due to the additive method of building parts layer by layer. Download Now

Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close