Admin Order 58-09-07-F - Laserfiche WebLink

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shrubs, and low-level plantings that can be expected to form a multi -layered, closed canopy upon maturity. • 2 rating: 50% - 69% of the setback area is covered by vegetation consisting of a balanced distribution of trees, shrubs, and low-level plantings that can be expected to form a multi -layered, closed canopy upon maturity. • 1 rating: less than 50% of the water quality management area is covered by vegetation consisting of a balanced distribution of trees, shrubs, and low-level plantings that can be expected to form a multi -layered, closed canopy upon maturity. 2.3.3. Streambank and Streambed Stability. This category requires the preparer to rate the overall water quality function of the subject lot based on the physical condition of the waterway channel as potential sources of sediment. This category recognizes that lower potential for sedimentation decreases the risks to water quality. If the /WQ Management Area on the subject lot does not include the waterway channel, the rating for this category is "not applicable." If the /WQ Management Area on the subject lot includes only a portion of the waterway channel, the rating applies to the physical condition of that portion only. • 5 rating: No evidence of streambed downcutting or streambank instability. • 4 rating: 1%-5% of length of streambed or streambank on the lot shows evidence of streambed downcutting or streambank instability. • 3 rating: 6%-10% of length of streambed or streambank on the lot shows evidence of streambed downcutting or streambank instability. • 2 rating: 11 %-20% of length of streambed or streambank on the lot shows evidence of streambed downcutting or streambank instability. • 1 rating: More than 20% of length of streambed or streambank on the lot shows evidence of streambed downcutting or streambank instability. 2.3.4. Table. The following Water Quality Function Rating Table shall be completed by the preparer consistent with the category descriptions in 2.3.1., 2.3.2. and 2.3.3., above and submitted as part of the Water Quality Function Rating System certification, report or determination. (a) The "Pre -Proposal" column shall be used to quantify the water quality function of the subject lot under pre- proposal/existing conditions. (b) The "Post -Proposal Without Mitigation" column shall be used to quantify water quality function of the subject lot under those conditions that would exist Administrative Order - Page 10 of 12