Civil Engg Articles URGENTLY Needed

Hi, I need 10 articles on Civil Engineering topics. I need them urgently. I am a civil engineer myself but don't have time. So I will thoroughly check the articles. Please include your writing sample. the areticles should be: 1) Original with no plagiarism. I will run Copyscape, 2) Atleast 600 words long, 3) The english shall be good, free of errors, Also, please note that I can't pay more than $30. I own full copyroght to the finished articles. I reserve a right to return articles, if I am not satisfied. Last but importantly, please submit your topics (based on Civil engineering only) beforehand, So I can approve. You would be writing only approved titles. Please remeber I am thin on budget and have three more similar projects. Thanking you for your time. Good luck. Vijay.