<br />PROJECT OVERVIEW AND DESCRIPTION <br /> <br />Size and Location of Project Site: <br /> <br /> <br /> <br />Type of Development/Proposed Improvements: <br /> <br />Watershed Description: The hydrology boundaries are the property lines. <br /> <br />Permits Required: Building Permit <br /> <br />Existing vs. post-construction conditions <br />the lot is vacant. The proposed condition is to be a single family houses. <br /> <br />METHODOLOGY <br /> <br />Drainage at existing site: Currently the lot drains to a existing ditch along the south property line <br />Coburg Rd, via two existing 24” culverts. <br /> <br />Potential impacts on the proposed site from existing conditions: <br />There are no impacts from the proposed site on the existing conditions due to t <br />pond. <br /> <br />Potential impacts from the proposed site on existing drainage: <br />but the increased runoff will be mitigated with a proposed detention pond. <br /> <br />Techniques for mitigating potential conflicts or problems: <br />proposed drainage to a proposed detention pond on the southwest side of the subdivision. The pond was sized using the <br />TR-55 unit hydrograph storage indication method. The proposed detention pond has an overflow outlet at elevation <br />417.30. The proposed outlet will drain into <br />storm drain culverts. The pre-development flow from the site <br />detention pond is 1.42 c.f.s. The total proposed flow after routing through the proposed detention pond is 0.85 c.f.s. <br /> <br /> <br /> <br /> <br />PROJECT OVERVIEW AND DESCRIPTION <br /> <br /> <br /> <br /> <br /> <br />Type of Development/Proposed Improvements: Single Family Houses <br />The hydrology boundaries are the property lines. <br />construction conditions: The existing condition is the property has a house and is abo <br />. The proposed condition is to be a single family houses. <br />Currently the lot drains to a existing ditch along the south property line <br />Potential impacts on the proposed site from existing conditions: The new single family houses <br />There are no impacts from the proposed site on the existing conditions due to the construction of a stormwater detention <br />Potential impacts from the proposed site on existing drainage: The new single family houses <br />but the increased runoff will be mitigated with a proposed detention pond. <br />or mitigating potential conflicts or problems: The proposed drainage system will consist of piping the <br />proposed drainage to a proposed detention pond on the southwest side of the subdivision. The pond was sized using the <br />ation method. The proposed detention pond has an overflow outlet at elevation <br /> an existing drainage ditch and cross under Coburg Road <br />development flow from the site is 0.96 c.f.s. The post-development flow to be directed to the <br />detention pond is 1.42 c.f.s. The total proposed flow after routing through the proposed detention pond is 0.85 c.f.s. <br /> <br />condition is the property has a house and is about 2.82 acres <br />Currently the lot drains to a existing ditch along the south property line which drains under <br />family houses will be built on site. <br />he construction of a stormwater detention <br />single family houses will increase the runoff, <br />The proposed drainage system will consist of piping the <br />proposed drainage to a proposed detention pond on the southwest side of the subdivision. The pond was sized using the <br />ation method. The proposed detention pond has an overflow outlet at elevation <br />an existing drainage ditch and cross under Coburg Road via two existing 24” <br />development flow to be directed to the <br />detention pond is 1.42 c.f.s. The total proposed flow after routing through the proposed detention pond is 0.85 c.f.s.