Volume 2: Draft Gorst Planned Action Environmental Impact Statement

GORST PLANNED ACTION EIS | AFFECTED ENVIRONMENT, SIGNIFICANT IMPACTS, AND MITIGATION MEASURESCounty. These manuals were adopted in August 2009, and apply to new construction within the City of Bremertonsince that time. The SWMMWW provides guidance on measures necessary to control the quantity and quality ofstormwater produced by new development and redevelopment. Aspects of stormwater control that pertain to soilerosion include guidance for controlling erosion and sedimentation. The SWMMWW includes appropriateminimum requirements and BMPs, including those for short-term control of stormwater from construction sitesand long-term management of stormwater at developed sites. The LID guidance manual provides guidance onselecting and implementing LID stormwater BMPS that reduce the amount of effective impervious surface on asite.Other Potential Mitigation MeasuresNo additional mitigation measures are proposed for soil and geologic resources.Significant Unavoidable Adverse ImpactsUnder all of the alternatives, future development would lead to the loss of currently undeveloped soils within theUGA, which will eliminate their ability to support other uses. The area of land that is currently undeveloped butwould be available for development ranges from 41 to 70 acres, depending on the alternative, plus land modifiedin existing or future rights of way or on lands for public purposes. While the total acreage of soil lost is likely to beless than the acreage of developable acres, it would constitute an unavoidable adverse impact.Under all alternatives, loss of soil from the watershed is likely to continue to occur as a result of flooding andstormwater runoff. Over the long term, these impacts would be greatest under Alternative 1, and lower underAlternatives 2 and 3.Non-renewable mineral resources would continue to be extracted from the study area on an indefinite basis underAlternative 1, and on an interim basis under Alternatives 2 and 3. This ongoing extraction would constitute a longtermloss of these resources, although the material would be used for commercial purposes as intended by theGMA.Draft | June 2013 3-11