Hi,
I hope you are doing well. My name is Darwing Camacho. I am a professional civil engineer and I have four years of experience. As a civil engineer most of my experience have been working with structural projects; however, I have worked before in different projects related with sewer and water distribution, off course, not as big as your project, but I have used programs such as Epanet, HEC-RAS, HEC-HMS, FlowMaster and CulvertMaster. I have also have good experience working with Autocad Civil 3D.
I know you may concern about my experience to this job, but I have a good assessor to this area, I could contact him to help me with this project, hi has a lot of experience in this topic.
I look forward to talk with you. I really appreciate your time and attention. If you have any question, do not hesitate to contact me.
Regards!