ORC minutes 090617 - Laserfiche WebLink

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Approved 10/4/17 3 Tony Blake said that he was confused by this section. He sees the section on new development but there is not a blanket 106 runoff statement there. The Falls Lake section seems to be completely different than Jordan Lake. Why doesn’t Falls Lake 107 have a similarly-worded rule regarding “no net increase in peak flow less than 10 percent?” This seems harder to read and 108 understand. 109 110 Allison Reinert replied that Falls Lake has a pre-existing rule about the 1 year 24 hour storm. Since the old language for the 111 Jordan Lake section does not apply anymore, the department must refer to the Environmental Management Commission’s 112 (EMC) recommendation as a minimum which is design criteria for new development, the 10 percent rule. She said that if this 113 wording is confusing, she could look into changing it. 114 115 Tony Blake responded that he was trying to put himself in the position of someone doing development in Falls Lake and may 116 not understand why the sections are different, but he understands the reasoning now. 117 118 Allison Reinert reviewed that new development has to meet the state minimum requirements related to stormwater control 119 measures and the North Carolina low impact development (LID) guide book. LIDs are promoted within the sections in 120 accordance with state law. The 10 percent rule is defined in the North Carolina Administrative Code and allows the counties to 121 set a regulatory requirement on the quantity of stormwater but does not allow them to impact quality. Ms. Reinert moved on to 122 review proposed changes to 6.14.7, which continue to remove mention of nutrient requirements in the Jordan Lake 123 Watershed. She pointed out some nomenclature updates in this section such as Department of Environmental Quality 124 formerly known as the Division of Water Quality. 125 126 Tony Blake said that he read this section and noticed no restriction on the Haw River Watershed at all. 127 128 Allison Reinert said that was correct because the section is just on Jordan Lake Watershed. She continued reviewing other 129 proposed changes. Since Best Management Practices (BMPs) are no longer being used in the industry, they are being 130 removed per the state department’s recommendation and will be replaced with “Stormwater Control Measures (SCMs)” as the 131 new lingo/nomenclature of Best Management Practices. 132 133 Dave Blankfard asked for the reason for the change. 134 135 Allison Reinert said she was unsure on the background but that the most recent minimum design criteria manual (released 136 about a year ago) referenced this change. 137 138 Tony Blake asked if this was on a state or federal level. 139 140 Allison Reinert said that this change was made on a state level and that the manual was created by a collaborator-style work 141 effort. 142 143 Tony Blake asked why there was not a reference to the author and would it be possible to have a link to get to the reference 144 from this document. 145 146 Allison Reinert said that she knew Chapel Hill had a link within the document for reference purposes, which is useful. 147 However, the links have to stay active which also requires the updating of the UDO more frequently. She continued her 148 presentation on subsection D regarding offset payments for developers regarding nutrient requirements in the Jordan Lake 149 watershed. This language is being removed. Subsection E also deals with nomenclature changes per the minimum design 150 criteria manual (not linked). Ms. Reinert said that she is open to talking about adding links within the UDO to reference 151 aforementioned manuals and guides related to these proposed changes. Next, she addressed peak runoff volume and noted 152 that the Falls Lake Watershed and Jordan Lake Watershed are distinct and are no longer the same in the requirements, 153 referencing the 10 percent rule. In 6.14.10 C (4) there is another nomenclature change from BMP to SCM. She asked if 154 anyone had any questions. 155 156 Kim Piracci commented on some language in the section that suggested methodologies on computing pre-and-post 157 development conditions. Is there an expert the County hires or someone from the department to define this? 158