Budget/Guideline Cost for a Tailings Dam

Posted in: , on 22. Feb. 2012 - 05:11

G'day,

This is almost like "how long is a piece of string" so here goes.

A colleague at one of my clients came to me ans asked me if I could give him some way of coming up with a budget price for a tailings dam.

What he is looking for is a cost that is based on the volume of the dam. This is only for initial budgeting and no one is going to be held accountable for it. The sort of thing he is looking for is something like the dollars per megalitre or something like that.

I know that it depends on the terrain and a whole lot of other factors, but he just needs to know if the dam is going to cost 1 million or 2 million or whatever.

At the moment he is trying to search for projects that have a tailings dam, and then try and work out the cost based on the volume of the dam and plot the results to come up with a budget figure.

Any pointers?

[I]Ian A. White, MIEAust. CPEng. RPEQ WAI Engineering [URL="http://www.wai.com.au"]www.wai.com.au[/URL][/I]

Tailingts Dams Etc.

Posted on 22. Feb. 2012 - 03:56
Quote Originally Posted by waiwhiteView Post
G'day,

This is almost like "how long is a piece of string" so here goes.

A colleague at one of my clients came to me ans asked me if I could give him some way of coming up with a budget price for a tailings dam.

What he is looking for is a cost that is based on the volume of the dam. This is only for initial budgeting and no one is going to be held accountable for it. The sort of thing he is looking for is something like the dollars per megalitre or something like that.

I know that it depends on the terrain and a whole lot of other factors, but he just needs to know if the dam is going to cost 1 million or 2 million or whatever.

At the moment he is trying to search for projects that have a tailings dam, and then try

and work out the cost based on the volume of the dam and plot the results to come up

with a budget figure.

Any pointers?



Costing for a tailings dam is a site specific animal that wants to escape at all times

as water is like electricity and is lazy and will go wherever there is potential for a leak.

The other major issue is the type of tailings.

Earthern dams will also leak.

A thorough reading of the "Johnstown Flood" by John Mcoullough? is a must read as

it is an eye opener about earthern dams.

The other issue is the weight of the tailings per cubic meter and its potential for polluting

the surrounding area, the surface water and the ground water. the other big issue is need

for a site sized barrier liner.

The other issue using the Hoover Dam as an example is simply mass and weight. When the Hoover

Dam was completed and the water was impounded it created earthquakes and shifts in the local gravity

if I remember the recent book on the construction of Hoover Dam correctly.

Don't Yell-the same worrries occured over the the New Madrid fault area when the area was flooded in

a somewhat controlled manner previously with the rivers overflowed due to upstream flooding.

The other issue is the tailings dam actual construction method and its materials used in construction

as well as the desired safety factor.

The issue with a tailings dam safety factor is the weight of the net tailings tonnage and the weight of additional

tailings against the dams actual square area exposed to the total tons per square foot of pressure of static

load against the dams exposed area.

The other issue is water and rainfall affecting the top of the dam and the number of drain spillways and

whether the spillways open or are controlled with knife gates.