I have an existing concrete lined trapezoidal channel (2'wide at bottom, 8'wide at top, 2' deep) that drains about 90 acres (Q~150cfs) and is sloped at 5%. All of this equates to a velocity of over 20 fps entering into a 48" dia. culvert. The concrete channel from the culvert to about 60 feet...
I am reviewing plans submitted by an engineer for a section of a residential subdivision. The development is roughly 5 units per acre in an area that is generally very sandy. The engineer used a "composite" C-value of 0.3 to determine the Q for each inlet. In my experience, the C-value tables...
I realize there are many possible factors that can affect the costs, but I need to know, roughly, how much a sheet pile retaining wall might cost. I am looking at roughly 500lf along a creek bank. The hight may vary from 5' above grade to 3' above grade. I do not anticipate have to anchor the...
The municipality that I work for is considering the possibility of changing our development standards to allow the use of asphalt wedge curbing instead of concrete C&G. While this is definitely not my recommendation, I have been assigned the task of locating any studies that may have been done...
