In 2016 a large ice deposit has been found within the Utopia Planitia region on Mars by the SHARAD instrument on board of the Mars Reconnaissance Orbiter.
The thickness of the deposit ranges from 80 to 170 meters with a composition that's 50 to 85 % water ice, mixed with dust and rocky particles.
It is shielded from the atmosphere by a soil covering estimated to be about 1 to 10 meters thick.
The volume of the ice in the deposit is estimated to be about 14,300 cubic km, so the mass will be about 14 teratons, the mass of the atmosphere of Mars being 25 teratons.
Now, if bulldozers could remove the soil covering in summertime, at daytime the ice would sublimate into the atmosphere and the water vapour would be spread out by the winds.
Of course, at night the vapour would have deposited on the surface again, and when all the ice of the deposit could be spread out evenly in this way about the whole planet, its thickness would be about 10 cm. In practice however it's likely that the various winds will gather the ice at certain places.
Question: if so much water ice could have been spread out on the surface of Mars by uncovering the ice deposit, would that not cover a large portion of the regolith and could not the water vapour in the air at daytime in the summer eventually "wash out" much of the dust in the atmosphere?