Here are two photos of monuments to Engineer units in the Ardennes area.
This one is standing in Neufmoulin (Belgium, Trois-Ponts area) and is dedicated to the men of the 291st Combat Engineers.
It were these men - I believe - who the infamous SS-Colonel Peiper called "Those dammed Engineers! 
'". They prevented him from crossing rivers by blowing up the bridges right before his nose. They also delayed his advance considerably. Let's not forget the major roles these men played (the war was not won only by 101st AB or 82nd AB and 2nd AD 
).
This monument is located in Redange (Luxembourg).
Dedicated to the 511th Engineer Light Ponton Company.
Sorry for the not so good quality of the photos but they were taken in 1990 (no digital camera).
Erwin