I agree AHJ does not make the call, But now if engineer does where does he get the info to make that call. Remember its not a stand alone building. Its a Township Water pumping station. There all over the country.
Yoopersup
Bottom line:
Not your problem. Above your pay grade.
Let the powers decide.
I can see this project getting started in the next 10 years.
QUICK, PUNT !!! Then politely ask them to call you.
Or treat it like a fire pump and spend all your time and money to finally not get the job.
I'm still trying to figure if this is for 'real' or a mind bender.
Personaly, I would like/let them (the powers),TELL ME what this pump is.
My opinion: It is a make up water pump for general usage..
Any other use is purely coincidental.