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Maximum allowable area of impacts within buffer zone, by density (SLLp3)

ID ND2009_SLLp3_Table1
Type Tables
Category Table
Authored by Paul Best
Effective on 27 Apr 2009
ISBN 978-1-932444-30-8
Edition 2009 Edition
Pages 61

Residential density (DU/acre)*

Residential density
(DU/hectare)

Nonresidential density (FAR)*

Percentage of buffer land**
where impacts beyond minor improvements are allowed

> 25

> 62

> 1.75

≤ 20%

> 18 and ≤ 25

> 45 and ≤ 62

> 1.25 to ≤ 1.75

≤ 15%

> 10 and ≤ 18

> 25 and ≤ 45

> .75 to ≤ 1.25

≤ 10%

≤ 10

>  25

≤ .75

≤ 5%

DU = dwelling unit; FAR = floor-area ratio.

* For this option, a mixed-use project may use either its residential or its nonresidential density to determine the percentage of allowable impacts, regardless of which is higher.

** For this option, buffer width may vary as long as the total buffer area is equal to the area within 50 feet (15 meters)  of wetlands and/or within 100 feet (30 meters)  of water bodies, minus excluded features (see below). The minimum buffer width, however, is 25 feet (8 meters) for wetlands and 50 feet (15 meters)  for water bodies, measured from the edge. In the minimum buffer, only minor improvements and/or improvements that result in no ecological impairment of the wetland or water body, as determined by a qualified biologist, are allowed.


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