Depending on your location, a good source is to ask the existing marketplace and surrounding gas firms who they use. Many times an engineering firm specializes in a specific formation or basin, such as Western Slope Colorado. This gives them an advantage with regulatory agencies and region...
I'm aware of the API limitations and valve requirements, I am looking for any other code or construction issues that would prevent me from installing the valves well, well away from the crossing, as in 1/4 to 1/2 mile from the banks.
I'm trying to find specific information as to the valve installation requirements, per 49 CFR 195.260. I am aware that valves are required, but would like to place them away from the river crossing and would like to know the constraints of placement in relationship to high water marks or banks...
