1" PVC water line under creek

[cenc]

Can someone please recommend the best method to place a 1" water line under a creek? Also, what about protecting the 1" line? Steel casing? A larger PVC pipe?

Bottom of creek about 4' deep, 10' wide.

Thank you.

 

[coloeng]

If you can't open cut the creek, you can always use directional drilling. YOu can have them pull back a larger HDPE pipe and then use it for casing the water line. Is this related to the project you mention in your other post?

 

[cenc]

Yes, it is related. With directional drilling, how far from the creek would they have to set up to get down 7' or so?

 

[coloeng]

It depends on the machine and size of drilling rod that they use, but they should be able to be within 50-ft of the creek and possibly closer.

 

[dicksewerrat]

Where does this water come from and go to? HDD should be able to install the whole thing in one pull if it is under 400 feet.

Richard A. Cornelius, P.E.

http://WWW.amlinereast.com

 

[tkall]

You can use directional drilling or, based upon local regs, put a culvert in the creek at the point of crossing,backfill it and use a backhoe to dig under the creek. Run your lines, clean up and pull the culvert. I would recommend against making the crossing with PVC. Use some stout HDPE and, since the big expense will be the labor, run more than one line so that you have a spare in the event that something happens to the primary line.

 

[bimr]

Depending on the height of the bank, you can probably set up about 7-10 feet away. You probably need to use HDPE as tkall suggests because the pipe is more flexible and has a short turning radius.

 

[tkall]

After looking at your previous post, I would use two 2" lines. Why be parsimonious? The cost is in the trench, not the pipe and facilities such as you describe always have a way of expanding. The hydraulics are simple enough to calculate but, pragmatics would dictate that you allow some capacity for future expansion.

 

[cenc]

Thank you all for the responses. Working for a very small firm with no one to turn to in person, great to get feedback like this.

Is there a particular reason no one suggested jack/bore?

 

[bimr]

Regading: "Is there a particular reason no one suggested jack/bore?"

You asked for the most economical method. Jack & bore is not economical in this application.

 

[cenc]

Can somoneone point in the direction or offer any suggestions of anything in particular that I should spec/detail for directional boring, other than pipe material and cover? Thank you.

 

[itsleighton]

If it is only ten ft wide, why cant you dig it with an excavator and bury it in ten minutes? At ten feet, you could stand on one side, dig a trench with a couple of swipes, lay the pipe in the trench with water and all and then bury it? Boring seems way too expensive for such a simple application. It could be done with a backhoe or excavator. Is there a reason it cant be open cut?

 

[cenc]

Permits.

 

[dicksewerrat]

In the spec. No leakage of drilling mud into waterway. Spec the pressure that the line must withstand or the material you want. . Cleanup of project. Just a few that I thought of. Call a couple HDD contractors in the area and see what they have. As long as you are going to HDD the line have them do as much as possible. Their mobilization will be a big piece of the bid price.

Richard A. Cornelius, P.E.

http://WWW.amlinereast.com

 

[cenc]

Thank you.