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Thanks for the Posts guys, finally getting back to this. On my way to do some research. Thanks for the input.

Hello, The firm I work with has acquired the task of determining a BFE for a section of a coastal city which up to this point has been in Zone A of the FEMA flood maps. I was thinking of approaching this task using the EPA SWMM but am at a loss on where to begin. How vast does my model have to...

OK, That makes sense, yes logically there is no way or need to put the entire acreage on the "Blue Roof", this should start to work out better. Any suggestions on an additional green infrastructure method of storm water treatment, such as a storm water planter or a rain garden ? How do these...

psmart, Thanks for your feedback, this will help in my learning the software. To explain a bit more in detail, the blue roof is simply to catch the rainfall from the newly created impervious area, that is it, to strictly attenuate this 4200 sf volume for a time span to allow for Water Quality...

psmart and/or other HydroCAD aficionados, Please see attached PDF files and HydroCAD files. Input welcome, please. I need the Blue Roof to attenuate the flow abit, not increase the runoff ?? Looking forward to your feedback. Going to be up allnight writing this SWPPP. Thanks for your...

psmart, Yes, I most certainly will post the HydroCAD file and any pertinent details once I have re-designed my model. I created a quick original model previously, using the pre-defined outlets HydroCAD has built in to the program, but now I have more info. therefore need to update my drainage...

Thanks psmart, Do you have any suggestions? This information , I am assuming will be obtained by the outlet control mfg.? The project is located in New England, therefore ice and snow is also an issue. Would you kindly provide an example using the exfiltration outlet? Thanks for your time.

Any HydroCAD aficiando's out there, I am looking to model a "Blue Roof" for storm water detention using HydroCAD Using the custom stage storage data modeled as a pond, how may I simulate a slow release on the volume stored ? I am pretty efficient using underground storage techniques, but the...

Thank you kindly for your response.

Hello fellow colleagues, The firm I work with has an inspection/materials testing division and we have been contracted as the Special Inspections Coordinator/ and firm responsible for documenting the required inspections for this amazing structure, the the state of CT. There is limited...

Along with this system, the client requested a basement bathroom, therefore, we used an ejector sewage pump for this. Does this need its own lateral to the septic tank, or may it be combined with the gravity lateral we have currently designed going to the septic tank ? Thanks in advance for...

We have a forcemain going from pump chamber to leaching field. We also have an ejector pump in basement of the residence. I currently have on sanitary lateral out from house to septic tank, Do I need another seperate lateral for the basement ejector pump. ?

Is there a required separation distance between a footing drain and a drywell surrounded by stone for stormwater storage ? I am familiar with the separation distances for subsurface sewage disposal , was not certain about storwater runoff ?

bimr, thanks for your response, FFE = 445, drainfield is approx. 200 lf away, it is planned for a force main to the leaching field, but I will entertain trying to do it by gravity. Therefore, a sewage ejector pump to pump the sewage to septic tank shall suffice, then I planned to pump effluent...

hello, I have a client whom plans to install his septic system drainfield up hill from his house elevation. therefore I know I am in need of a two tank system, one to house the sewage flow and the other to pump the effluent to the drainfield. In return, the homeownwer want to install a...

oops forgot to include the file here it is attachedhttps://files.engineering.com/getfile.aspx?folder=97d60247-dc89-4289-aed4-7f562f20423e&file=Angle_of_Repose.jpg

Attached is a typical chart showing different angle and soil types in varying conditions Also included the following link. hope it helps. Link

Absolutely agree, thank you, I will recommend additional Quality control when steel erection commences.

Thank you for the information, I will respond with the direction of recommend no slots in the flange plates, if so desired, more design required, therefore, leave it up to the detailer & owner to make the decision. Thank you gentlemen for the input. Sebast

Great thank you for input.