The sluice boxes used by both the Moria and White Hand Orcs to filter the mined ore should not be left functional. Destroying them will help slow down the Orcs' production of weapons and armour.
The Orcs of the Redhorn are busy mining ore and have built sluice-boxes to help them filter the ore from the dirt. Destroying the sluice-boxes throughout the Redhorn Lodes can only help to slow down the Orcs' mining operations.
Orcs are using sluice-boxes found at the bases of the elevated tracks throughout the Redhorn Lodes, south-east of the Orc-watch.
Orcs are using sluice-boxes found at the bases of the elevated tracks throughout the Redhorn Lodes, south-east of the Orc-watch.