I wanted to see if anybody knows of any classes that go over floodplain delineation and/or doing the LOMR or CLOMR applications. I've been looking around and haven't seen too much. I would be able to go just about anywhere in the continental US if the class is good enough to warrant it...
Just wondered if anybody has used the dewatering bags that you can pump sediment laden water into and it filters it out and allows the clean water to pass through. I have not had to use them yet and wanted to know how effective they are, how much water can be passed through them before they...
Twinkie, I'm modeling 1 through 100 year storms. Fortunately, since they wanted this as a water feature I was able to oversize the pond and keep the peak elevation for all the storm events below the catch basin grates.
gbam, yes this would a wet basin.
sam74, unfortunately the point that this pond discharges to is only about 4 feet lower than the catch basin grates. That's after raising the building finish floor about 2-2.5 feet above existing grade. There is talk now of making this a dry basin instead...
Working on a project where we have limited depth to the point where storm sewers lack typical cover and are even not fitting into catch basin structures. The client wants to have a retention basin as an aesthetic feature on site. One way to remedy the storm sewer elevations would be to lower...
I would have the manhole installed as well. Your pipe diameter could play an important roll in the systems performance as well. The smaller the diameter your using, the higher the chance for sediment accumulation you may have. Keep your pipe velocity at least 3 ft/sec or slightly higher. I...
Is there any research out there about using moss as a ground cover for a swale. Generally if you're in a shady, moist location and you have an acidic soil you can establish moss growth. Just wasn't sure if it has the ability to hold up to slow or moderate running water and what kind of root...
Thank you guys. The current proposal also had two lift stations that would be at each end of the 700' feet I was referencing. So there was also another motive to eliminate the furthest lift station as well. I know the force main could be done by HDD.
Can a sanitary sewer be directionally bored under truck docks with the end result being a gravity sanitary sewer line? Pipe size would need to be 6" or 8". Length of the bore/pipe would end up being about 700 feet. I am trying to avoid tearing up trucks by installing an open cut sanitary...
Seems like most projects I design end up with a small orifice to meter the water quality volume. I need to find some alternatives for these small orifices. 95% of our projects are designed with an extended-dry detention basin for stormwater management. Therefore, a reverse flow pipe isn't an...
Have a project where we will have a small amount of underground storage serving as part of our detention system. It will be 5 runs of 18" diameter pipe (double wall w/ corrugated exterior and smooth interior) and each run is 200 feet long. Looking at the how the manifolds were constructed...
Thanks guys. You touched on my concerns as far as tapping a 12" line with a 12" tap. I like the idea of using an 8" tap to a 12" reducer. The head loss seems reasonable and since it's creating a loop the pressure in both existing lines should still improve.
Have a project where they want to loop the water line from one street with a 12" line to a cul-de-sac with a 1o" line. The proposed water line will be 12". When tapping to the existing 12" line, is it easier/better to use a tapping sleeve and valve or shut the line down and install a 12"x12" tee?
This basin will be used as a landscape feature in the front of the owner's building with a fountain. We did a test hole down to 11' and the material on site appears to be good clay. The water table was not as high as predicted. In fact after we reached the 11' mark no water had initially...
I have a retention basin that I would like to construct in a C/D type soil. The depth to water table is shown to be at a range of 12 to 30 inches below grade. The soils info a have also says that the Capacity of the most limiting layer to transmit water is Moderately low to Moderately high...
