Coal Bell Pit

a primitive coal mine, built on flat land.
miners will extract the coal from a ‘bell’ shaped pit dug into the ground.
it has a limited production of only 600 and will become derelict afterwards, or it can be upgraded.
employs 3-8 miners.
Happiness: Detraction, 11 tile radius
Building footprint: 7 x 7
Production:
= 45 coal
worktime: 8.0 workrequired: 44
the mine requires 34 work to construct by builders,
& 21 wood

upgrade option:
Coal Bell Pit Mine
allows a longer lifespan (5,400), and slightly quicker extraction of coal with the addition of a pulley system to aid the miners.
employs 3-8 miners.
Happiness: Detraction, 13 tile radius
Building footprint: 7 x 7
Production:
2 lumber = 45 coal
1 wood = 45 coal
worktime: 8.0 workrequired: 34
the mine requires 89 work to upgrade by builders,
& 21 lumber + 13 logs + 8 iron fittings + 2 iron