What to do with storm flow during maintenance of basins?

[developmentPE]

A client needs to fix the liner in their stormwater basin, because they never performed regular maintenance on it. What would anyone suggest for addressing the issue of having to deactivate the basin from stormflow during construction? Would creating a temporary dam and pumping the runoff through a silt bag to collect sediment work well enough?

 

[cvg]

will that meet the SWPPP?

 

[beej67]

I would think the answer to this question varies widely depending on what region of the country you are in, what the purpose of the stormwater basin is, and how it functions.

Hydrology, Drainage Analysis, Flood Studies, and Complex Stormwater Litigation for Atlanta and the South East -

http://www.campbellcivil.com

 

[ACtrafficengr]

Not to mention local hydrology, soil type, climate, municipal & state regs, etc. If you are in an MS4 area, check with the regulating agency in your municipality.

Can you schedule the work during a dry season, or does it need to be done soon?

"...students of traffic are beginning to realize the false economy of mechanically controlled traffic, and hand work by trained officers will again prevail." - Wm. Phelps Eno, ca. 1928

 

[gbam]

What are the odds of the repair being completed prior to a storm event. Can you require that repairs are completed in X time frame?

 

[developmentPE]

The repair is taking place in NJ. Essentially the liner of the basin (45000 sqft) needs to be replaced, and it's been projected as a 2 month project. Odds are, I'm going to have an issue with a storm event coming through

 

[beej67]

That's not small.

Do you have a hydrologist working on this? You need an engineer that knows his stuff regarding hydrology and hydraulics so you know what sorts of volumes and flow rates to deal with. If that's you, that's cool, I'm just saying. Sometimes folks show up on these forums hoping for a simple answer to a complex problem. If you don't have a hydrologist yet, get one.

We still don't really know enough about this thing to answer the question though. An acre pond in Jersey with a "liner that needs maintenance" sounds like a concrete lined pond, yes? And it was for what, flood control? Any other (water quality?) functions to it? And it handles how big of a drainage area of what nature? Does it handle pollutants or industrial runoff or anything weird? Who's your client?

What sort of 'liner' does it need exactly, and is there anything preventing you from going with a textile solution, stitching the whole thing together nearby, and just rolling it out into the pond on a dry day?

My first impression, presuming we're talking about an acre concrete box and some sort of liner coating that requires curing time: Can you throw up a wall down the middle and work on one half while the other half is active?



Hydrology, Drainage Analysis, Flood Studies, and Complex Stormwater Litigation for Atlanta and the South East -

http://www.campbellcivil.com