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Okay this is about work so it will be boring to you and hard to understand, but I need to vent, so here I go anyway.

A couple weeks ago I spent something like THREE DAYS designing a stupid stomwater basin. We're not discharging any water, we're infiltrating everything, which means that this basin has to hold all the runoff generated by a 100-year storm. Additionally, it's at one end of the project (across the street from most of the homes, actually), so it had to be deep, because of course the water gets there via pipes, and so at the far end of the project the pipes are going to be at a much higher elevation than the bottom of the basin (water runs downhill, doncha know), and they can't be sticking up out of the ground. So I have this RIDICULOUS looking basin that has a bottom elevation of 94, and technically has a top elevation of 105 (SO DEEP), but even THEN it doesn't meet the ground until elevation 119 or even 125 at one end. It's like a basin inside a hole, it looks stupid, but whatever, it is also very large so it won't look as ridiculous in real life as it will on paper.

But so anyway, it took me forever to get the basin big enough in the space I had. But I made it work.

So remember how I said the top of the basin was 105? That means that the water level in the basin during a 100-year storm is at most 104, because you need one foot of freeboard. Fine.

So Bruce goes ahead and designs the road profile for the project. Only problem is, he designed it so that the inlet at the lowest low point is at 101.7. Well, that means that the water surface elevation for the 100 year storm can't be above 101.7, because the water will begin to back up the pipes and overflow the inlet. So I had to redo the stupid fucking basin again! I spent all today doing it! I'm staring at these fucking bright green and cyan lines on black background, with a little bit of a hangover headache that would have been gone hours ago if not for this, and man, Bruce! Why did you do that!!

I made the stupid basin even stupid bigger, and I got the water level down to 102.71. That's as far as I can go, I have no more room left. Whatever, we're just going to submit it and hope they don't notice. Bruce doesn't think we'll get approval anyway, for other reasons. Great. But I STILL have to do the freaking stormwater report, which I thought I would be working on today, but I had to do this stupid basin resdesign. PLUS I told this client of Chuck's that I'd go out and redo the wetlands delineation for this other project sometime this week, but I don't have TIME to do that unless I go tomorrow, but I still have to do shopping for Bonnaroo and I was supposed to do THAT today and tomorrow!

Man. My head hurts. I'm going to Target.


( 5 comments — Leave a comment )
Jun. 5th, 2004 05:42 pm (UTC)
I just got back from Target. Man I hate it when other people screw up your work...that sucks.

What is a 100-year storm then? I assumed you're not planning for the apocolypse over there...
Jun. 6th, 2004 04:53 pm (UTC)
Man I can never remember. I think a 100-year storm has a 1% chance of occurring. That is, any storm has a 1% chance of being that big. I know it's *not* a storm that occurs every 100 years, because that's what it sounds like, but it's not that.

I wish I had a more practical understanding of exactly what it is I calculate all day. I wish that when it was raining, weathermen would say "that's a 20-year storm out there!" so that I could have some kind of perspective.

We have to design for the 100-year storm because if it rains more than that, the basin overflows and property can be damaged. Pipes are only designed for the 10- or 25-year storms.
Jun. 6th, 2004 06:07 am (UTC)
Mna I somtimes don't mis working in autocad (I'm assuming that's what you are using) AT ALL.

Stupid non-engineer question - can you just increase the diameter of the basin in order to get to the max volume you need it to be? I know ABSOLUTELY NOTHING About civil engineering so just ignore this if that is a super stupid question.

Lastly, I love Target, I hope you got everything you need there!
Jun. 6th, 2004 11:45 am (UTC)
Well yeah, but I have a limited amout of area I can use, I have to fit it between property lines and right of way lines and whatnot. And still make it meet existing contours.
Jun. 6th, 2004 04:12 pm (UTC)
Ugh. NOT fun. I was hoping you could just kinda scale it up, you know?
( 5 comments — Leave a comment )

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