Could you please tell us if you own this storm drain? How is it not the property of the city/county?
Could you please tell us if you own this storm drain? How is it not the property of the city/county?
In case your plastic cover doesn't work i would suggest an annular cutter in a mag drill that is by far the best way I have found to cut big holes in thick steel.
Invert cover to see where the support ribs are located. Drill center hole from the backside so as not to cut support ribs. Flip lid right side up and drill with a hole saw. Use heavy gloves and place leg to stop reaction force of drill or keep legs and arms out of the way. Use vegetable oil for lube if needed.
If you lived in the west water laws would probably outlaw dumping poisioned water into flowing water where the chlorine will kill life.
Bill D
The Manhole cover isnt your property so no as far as legality. What you could do is excavate a little on the side and drill through the concrete that its most likely in.
If you do go through with drilling the cover use a pvc Union right next to it so if needed they can get into it.
You shouldnt need a mag drill its very soft steel.
I made the mistake when I was young of using blind flanges to make a shooting target. Sat at the bench 200 yds out and didnt see them swing or here them. 223 ripped through 1-1/4 of the same soft steel
Tampering with that heavy sewer cover could put you directly in line for responsibility in any future loss of life caused by your action.
If kids figure out how to unscrew and remove your light cover, and one ends up in the hole and drowns, will you be able to look in the mirror or face a sobbing mother? A heavy cover is put there for a reason. It’s wise to leave it alone, no matter how inconvenient.
The city itself may be willing to assist you with your problem. Just ask the proper authority.
Cast iron is easy to drill, think of it like a very hard wood. No lubricant is necessary. Just follow the previous suggestions of using a solid 1/4" pilot. And a quality bi-metal hole saw.
NOW you tell me...
I see your point, Tony. If this was a full size rain sewer under our property, I would leave the cast iron cover in place. This particular manhole isnt really a manhole. It only goes down a few feet to an 18 galvanized pipe that eventually feeds into a real rain sewer.
far more dangerous is a well in the front of the property. Theres a (about) 24 diameter section of concrete sewer pipe sunk verticall in the ground. The only cover is a chunk of slate or bluestone that weighs a lot. I can slide it aside but our grandkids cant yet. I would like to fill it in with something but I just havent taken the time to look into it.
One of my college profs asked the class, "Why are manhole covers round?" Do you know?
Mike
Go into the world and do well. But more importantly, go into the world and do good.
Round, with a lip is the only geometric shape that will not at some cross section be smaller than the longest cross section
Annular cutters are perfect for such projects!
https://www.amazon.com/Annular-Cutte...node=340028011
You can usually pick up odd sizes on ebay for cheap.
If you don't want to rent the magnetic drill press try securing a piece of plywood to the man hole lid (a couple of clamps). Then drill through the plywood which will then act as a guide for the Annular cutter or hole saw to keep it from running all over the top of the cast iron. A magnetic drill press would still probably be my preference though. I would also recommend some kind of cutting fluid (or even just dirty engine oil).
Last edited by Michael Schuch; 05-03-2022 at 2:50 PM.