by Dr. Jim SpottsTechTalk is a forum for resolving erosion and sediment control and/or construction related problems from a technical perspective. Technical questions are submitted by the reader; suggestions may be from Southeast Environmental Consultants, LLC, (SEC) or other sources. The reader is solely responsible for the results, if the suggestion is implemented.
I see rock filter dams catching sediment; but the toe of the dam is eroding away. Net benefit is zero. What should I do? Response:
Once the stream dumps its sediment.
load upstream, it regains energy and scours the toe of the slope. Try extending the toe further downstream. Always have the extension lying over a non-woven geotextile material to prevent scour of the streambed.
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Clean Water Act Enforcement
Senior Housing Clean Water Act Settlement (Jan. 7, 2009)
Five defendants associated with the construction of the Liberty Village housing development in Lynchburg, Va., will pay a $300,000 penalty and fund more than $1 million in stream and wetlands restoration work for alleged violations of the Clean Water Act and permit restrictions during construction.
The consent decree would resolve allegations that the defendants discharged and/or controlled and directed the discharge of pollutants including
dredged and/or fill material, sediment,
and other pollutants carried by stormwater into waters of the United States during the construction of a housing development without required permits, and then in violation of the stormwater permit after one was obtained.MORE
Duck Nesting Success:
What Is It, and What Are The Important Things That Affect It?
The Bottom Line:
"The population growth rate of upland nesting ducks is influenced more by their nesting success than by any other aspect of their life cycle. No factor is more important in determining nesting success than habitat."