Thread: Shooting ranges

Drainage

If ground is flat naturally then you guys in the South don't need a North Islander to tell you what liquiefaction is.
If ground has a slope then it's a good idea to do slit trenches say 300mm or one narrow digger bucket wide and maybe 600mm deep running downhill with an interceptor drain across the top of the slope and a bigger runoff drain at the bottom of the slop leading down to a soakpit full of rocks or a pond outlet or some such. Fill em with rock or gravel

Also the piled earth berms are going to weigh down on the ground and squeeze water out of the ground slowly over a couple of years (if clay) so they will be wet alongside - slit trenches underneath will carry some of this water away

This will take a lot of gravel but it's easier at the beginning of the project


Also whilst digging, if funds allow, a shallow trench with electrical conduit all sealed up and a draw wire running through would be a good extra if run down the line of some ranges - you could later run cables for turning target control or moving target control etc

It will be good to see this project take shape

Thanks for that
The drainage is going to be a close one. The site slopes about 800mm side to side and is about 300mm from end to end, the soil is quite permaable, and theres a main drainage canal running on the down side (drain goes for miles up and down from this site. At the moment the thoughts are along yours, with the addtion of novaflow pipes in as many as possible - all draining towards the canal drain.

The power distro around the site, we might be onto a moleplow to put in the main feed. Hopefully at the same time we can get so ducts run around the place for your exact reasons. The whole site will have wifi and internet(target cameras, target control, site cameras, access control, scoring, porn watching while waiting to shoot, reading the forum, etc) but getting power around is still being sorted (lighting, running boar, target turning actuators, access control, )

I'll try and post some pics up etc, as and when things of note happen.

Originally Posted by 308

Drainage

If ground is flat naturally then you guys in the South don't need a North Islander to tell you what liquiefaction is.
If ground has a slope then it's a good idea to do slit trenches say 300mm or one narrow digger bucket wide and maybe 600mm deep running downhill with an interceptor drain across the top of the slope and a bigger runoff drain at the bottom of the slop leading down to a soakpit full of rocks or a pond outlet or some such. Fill em with rock or gravel

Also the piled earth berms are going to weigh down on the ground and squeeze water out of the ground slowly over a couple of years (if clay) so they will be wet alongside - slit trenches underneath will carry some of this water away

This will take a lot of gravel but it's easier at the beginning of the project


Also whilst digging, if funds allow, a shallow trench with electrical conduit all sealed up and a draw wire running through would be a good extra if run down the line of some ranges - you could later run cables for turning target control or moving target control etc

It will be good to see this project take shape

You only really need Novaflo (with a sock) in clayey areas where the clay will gum up a trench. If your trench is pea metal or loose stones and more than say 200mm wide it should be ok but talk to local contractors

Ideally you have a rectangular grid - one shallow drain at the top to head off surface water and a series going down towards the main drainage canal to drain the site

Originally Posted by 308

You only really need Novaflo (with a sock) in clayey areas where the clay will gum up a trench. If your trench is pea metal or loose stones and more than say 200mm wide it should be ok but talk to local contractors

Ideally you have a rectangular grid - one shallow drain at the top to head off surface water and a series going down towards the main drainage canal to drain the site

Gottcha on that. The soil type is quite fine, so a bit worried about fines migration, gumming up just rock drains. Plus we have a few metres that may be going to be 'donated' .....

I think in may try and put some trench's on the plan with slopes etc and try and figure it out a bit more scientifically than just a scratch in the ground later.