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Does anyone know what type of equipment is required to produce bathymetry maps? I need an instrument able to simultaneously record UTM coordinates and a sounding depth and upload them into a PC to be used with ArcView program. I’m looking for something that gives me the same info that a hand...

Thanks for the tips, I found what I was looking for at: www.access.gpo.gov/nara/cfr/waisidx_02/40cfr125_02.html

Hi, I understand that the EPA has recently approved or is currently reviewing new regulations on cooling water intake screen requirements, Sec. 316(b). I am hoping that someone can provide me with a direct internet link to the regulations. Information pertaining to appropriate screen...

Thanks for the offer to put me in touch with a professional "KRS" but I’m making some headway here. I’ve seen published documents with baffle requirements in Washington and British Columbia and the regulators are willing to look into researching this. It looks like a limited number...

Anyone had any luck convincing the regulators that a baffled culvert is appropriate. I am having trouble meeting fish passage requirements with less than 5 CSP culverts and a bridge is way too expensive. I’m in a location where slopes are low, typically less than 1%, so I thought I’d try a...

Ah yes, frazil ice. Well thanks for the insight, the link was very informative although there doesn’t appear to be a very thorough understanding of frazil ice nor remedies for it. I guess we’ll have to go with some sort to resistance heating in the screen.

Thanks guys, The removable screen might be a possible alternative, however we then run the risk of the operator running the rig without the screen, as was done in the past, and setting us up for fines and additional legal actions. In most cases the ice will hopefully thaw when the intake is...

During the construction of ice roads on lakes and rivers north of the 55th parallel water is pumped to the surface to thicken the and strengthen the road. Water intakes are repeatedly plunged into water and then lifted back into sub zero air temperatures and transported. Time of transport...