All,
I'm developing a residential subdivision in New York State that will result in the need to obtain a State Pollutant Discharge Elimination System (SPDES) permit for stormwater discharges associated with construction activity (specifically, NYS SPDES GP-0-15-002). I'm unsure how many of you...
All,
Has anyone come across or have a spreadsheet that can calculate culvert flow characteristics utilizing the 6 basic types of culvert flow? I'd like to incorporate it into an excel spreadsheet I'm trying to build.
Thanks in advance.
All,
Looking for any insight here, and I apologize for the vagueness, but there is a gag order on the project. I'm tasked with researching the feasibility of a web-based program that will utilize a GUI and reference a database that will perform calculations, and spit the results back to the...
So I have long had an interest in learning a second language, and have finally decided to take the plunge and make a go for it. I'd like to know if anyone here is bilingual or knows someone who is (that practices in engineering), and how they apply it to their profession. I am still a young...
I'm looking for a guide on the approach to designing/sizing injection well pumps. Does anybody have any or know where to find published procedures for this?
Thanks in advance.
I'd like to open a discussion regarding catch basins and why they are not replaced with drywells with overflows (essentially catch basins with holes in them to promote infiltration). The two theories I have come across are:
1. Way back in the day, many sewer systems were combined sewers and so...
I've thoroughly reviewed and experimented with the Ductile Iron Pipe Research Association's Thrust Restraint Design for Ductile Iron Pipe program (their program for determining required lengths of restrained pipe joints). It's clear to me that DIPRA would want to err on the side of...
I'm working on a Project where the town code is updating, and subsequently replacing all thrust blocking with restrained joints. I've done a fair amount of research on the subject, and found DIPRA's Thrust Restraint Design for Ductile Iron Pipe (and their free program) to be the best resource...
I'm working on a Project where the town code is updating, and subsequently replacing all thrust blocking with restrained joints. I've done a fair amount of research on the subject, and found DIPRA's Thrust Restraint Design for Ductile Iron Pipe (and their free program) to be the best resource...
Question: A colleague of mine found a published standard somewhere that says water useage is typically approximately equal to 75% of sewage generated. Does this sound right to the rest of you? I thought this "rule of thumb" sounded like it was meant to be taken from the perspective of a...
All,
I have a colleague who wants to design a septic system discharging from a small commercial building (Peak Daily Flow ~ 1000 GPD) using a grinder pump/septic tank/absorption field system.
The field is located approximately 600 feet away from the grinder pump, and at an elevation about...
Quick question.
I'm designing a retaining wall that will be retaining approximately 7' of fill at its maximum height. Also, at this same location, the retaining wall must abut to an existing Building. The existing building is already designed as a retaining structure so there is no problem...
When designing/analyzing retaining walls, at what distance(both uphill and downhill) of the wall does the analysis need to extend? I had a professor once tell me that when designing a retaining wall, anything (and everything) on the upside and downside of the wall has an effect. However, while...
I know this has been discussed a bit on here, but I haven't been able to find what I'm looking for. Does anyone on this site actually perform home inspections in new york state? If so, I'd appreciate some first hand information regarding it. For instance, do you perform them on the side or as...
Hello everyone,
I'm designing a pump station to convey your typical waste from an apartment building. The pump station is designed with two submersible centrifugal grinder pumps, and connects into an existing municipal low pressure sewer force main. I've spoken with the Wastewater Treatment...
All,
How are pressure sewers restrained? Are thrust blocks (similar to potable water distribution systems) an acceptable means for restraining pressure sewers? If not, why not?
Thanks.
This has probably been stated before, but for the life of me I cannot find any answers online anywhere. But could someone give me an idea what the operating pressures are for a low pressure sewer? Or maybe there is no "rule of thumb" with these? I'm being challenged to design a force main to...
I'm trying to estbalish my library of construction site details. Does anyone have a good online reference for such a thing? I know Florida has a pretty good site, but am looking for others - preferably in New York State. I've looked at NYSDOT and NYSDOH already, but was wondering if anyone...
Could anyone point me to a good source for a Design Table that covers all the classes of PVC SDR pipes? I'm looking for something that might list Pipe Size, Pipe I.D., Pressure Rating, and SDR.
Thanks in advance.
Why are tie rods often times specified with hydrant installations? As an example, suppose you have an 8" water main, and you tie into it with an 8x8x6 Tee Joint. Then between that Tee and the Hydrant, there is typically a gate valve installed. My question is, why are tie-rods specified around...
