Enrico Mylius Dalgas K.1 D.M. F.M.I (16 July 1828 – 16 April 1894) was a Danish engineer who pioneered the soil melioration of Jutland.
Dalgas was born on 16 July 1828 in Naples, where his father Jean Antoine was the Danish consul. He was baptised Heinrich D. Dalgas. His mother Johanne Tomine née Stibolt was the daughter of a Danish naval officer from a distinguished family. Jean Antoine was descended from Huguenots who settled in Switzerland after the edict of Fontainebleau, whence his grandfather Antoine settled in Denmark. His brother, , was a noted animal artist. When he was 7, his father died and his mother brought him back to Denmark.
Dalgas joined the Danish Army as an officer of the Engineer Corps (today the Ingeniørregimentet). He mostly served as a highway engineer, reaching the rank of Lieutenant Colonel before he moved to the newly established civilian body of the Highway Authority. He also served as a pioneer officer during the First and Second Schleswig Wars, during which two of his brothers died.
Dalgas applied the knowledge and skills he gained as a military engineer toward the reclamation and afforestation of western Jutland. After Denmark's defeat in the Schleswig wars and the ensuing loss of territory, the removal of hardpan was considered a national priority. Working on roads across Jutland gave him an intimate knowledge of the different soils present in Denmark, and the organisational skill he gained as a military officer and civil servant helped him manage large planting and forestry projects. As he performed assessments of road damage, he got to know locals and learn about their concerns, gaining knowledge as well as many allies who helped him in his endeavours. Dalgas was among the leading forces behind the planting of heaths, for while they had been cultivated before, their widespread planting was an innovation that required much more organization.