Need a lift station for a residential subdivision

[z8e]

Hello,

I don't know if this is an appropriate question, but I'll take the chance. . .I'm working on a residential 110-lot subdivision that will require a lift station and about 1,000 feet of force main dumping into a gravity sewer system. I need help with the design. That could be anything from some hand-holding to a turn-key design. I'm not looking for pro bono work, I would expect to pay.

Thanks.

 

[PELS]

Why not hire a firm that specializes in water/wastewater engineering to design the system for you? You could hire them as a sub-consultant to you. You can also learn design issues from this experience by heavy interaction with the lift station design engineer.

Sewer lift stations are somewhat of a specialty design item in residential development. Some jurisdictional agencies can be real anal about the design. Especially in dealing with a variety of issues such as pump selection criteria, gound water table, odor control, surge forces in the force main, telemetry controls, pig launchers, etc. If you don't have the expertise, hiring a specialist is cheap insurance for a faulty or incomplete design.

As a professional engineer you must also protect the public interests. Designing a facility for which you have no experience or expertise does not do this. You owe it to the public to provide a quality product, just as you would expect from your doctor or dentist or other professional. Knowing your limits is the sign of a true professional.

 

[civilperson]

Pick one out of a catalogue.

 

[francesca]

Call the city and ask them whose pumps they use. Then call the manufacturer and they'll hold your hand through the design. The city will end up owning the lift station, but won't take responsibility for your design. Replacing incorrectly specified pumps/impellers is not cheap, so it's worth getting a third set of eyes to check the answer if the city won't do it for you.

If it's only 1,000 feet, is it not possible to run a deep gravity line? That is a preferable solution if it is possible.

 

[davecrimp]

I've designed a number of lift stations and specialize in water/wastewater, but I'm only licensed in OR and WA. You're welcome to call me with questions.

PELS is correct that there's a lot to designing a station that meets City and state requirements, and that you should subcontract to an engineer who will take primary responsibility for the design and interface with the agencies. Most of the entities I work for require the engineer of record to have Errors and Omissions insurance.

Best regards,
Dave Crimp PE
Clearwater Engineering Corporation
19904 Summit Highway, Blodgett OR 97326
541/456-2045 clear@pioneer.net

 

[crawcrow]

SWPA handbook is always a good place to start. Offers a bunch of really useful information. (sizing/type of pump to use/etc)