Microsoft Excel Templates used to create these sample forms are available on the Riverside County Transportation Department website. Construction Project Cost Breakdown Template Simple Minimal Editable Downloadable Printable Form Small Business Fill In PDF -Black and White.All downloadable documents will be downloaded WITHOUT a watermark on them and in a PDF 8.5x11 document. In this blog, we will teach you how to write an effective construction proposal that stands out from the competition. The Riverside County Office of Economic Development ("County") in accordance with.