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Gold was once very useful because you could go into any saloon and buy beer with it...now THAT is useful. [cheers]

Thank you for all the replies...you certainly shed some light on it for me. Highway27 - Your reasoning makes sense to me, especially since the regulatory agency's design manual says nothing about the HW/D, just basing allowable headwater on being some distance below the road. I'm going to...

A number of culvert design standards say that the maximum headwater depth is limited to 1.5 x diameter of the culvert. Can anyone explain the basis for this criteria? We're designing a replacement culvert for an old 3-ft diameter culvert that collapsed. If we replace it with another 3-ft...

I am considering whether to purchase StormCad and Pondpack programs by Haestad Methods. We just got Autodesk LDD 3, which has Civil Design modules for designing storm drain systems, and stormwater management ponds. We have used previous versions of Autodesk LDD for grading and road design, but...

Texas DOT/Texas Trasportation Institute has a lab for performance testing of erosion and sediment control products. Try this link: http://tti.tamu.edu/enviro_mgmt/facilities/hec/