Beach/sea sand is also too rounded and doesn't have the compressibility that river sand does. Irregular shapes always work better for construction purposes compared to round shapes. (ever made a driveway or foot path out of pea gravel? It's not nearly as stable and compressed as crushed limestone.)As stated.....sand is needed to make concrete but it has to be sand from lakes, oceans etc. Desert sand won't work for concrete it has been tumbled too much by being blown around by the wind. Thats my understanding anyway.
Someone needs to say thanks for the on the ground reporting, so here it is. Those holes eventually spring to life?No shortage of active and depleted sand pits near me. They do eventually fill in somewhat but I've not heard of or seen one that was mandated to be put back in the condition it was before the extrication began.
They make an awful mess of the land, but I guess they are a necessary evil. View attachment 4428
Most of the light colored stuff is shallow 3-10' deep water over the sand.
View attachment 4429
It looks even worse from the roadside view.
For fishing and waterfowl? Yes. It takes years for them to clear up tho. Lots of silt and clays above and below the coarse sand.Those holes eventually spring to life?