SUBJECT:
Title
Azaleas Skilled Azaleas Skilled Nursing Facility - Major Site Plan
Project #2025010041 #32388 Parcel #35695-019-03
Clymer Farner Barley, Inc.
LDC 6.13.7.B Geotechnical Criteria
CODE states Minimum requirements. (1) Depth. Soil test borings shall be performed to a minimum depth of 10 feet below the proposed finished grade of the bottom of all retention/detention areas or the permanent pool elevation and once the data has been obtained the hole shall be backfilled and compacted. (2) Number of tests. At least two tests shall be performed within the boundary of each proposed retention/detention area. For each half acre of pond bottom area and for each lineal retention/detention area of 250 feet, an additional test shall be conducted. The County Engineer or his designee, may require additional tests if the initial tests indicate the need for them. (3) Infiltration/permeability tests. For retention/detention areas utilizing percolation or infiltration in the design model, there shall be a minimum of two infiltration rate tests for each retention/detention area. Data used for soil permeability testing or infiltration analyses for the retention/detention areas shall be signed and sealed by a professional engineer or professional geologist for both data and procedural accuracy. (4) Aquifer parameters. The estimated seasonal high ground water elevation and confining layer shall be clearly identified.
APPLICANT requests a waiver for the minimum number of borings and infiltration/permeability tests for two (2) of our stormwater ponds: B-03 and B-04. These retention areas are so small that there is not enough area to conduct two separate soil borings and/or infiltration/permeability tests with independent results, resulting in unnecessary drilling and cost.
LDC 6.13.8.B(7) Minimum Pipe Size
CODE states Sizes: Stormwater conveyance pipes and cross culverts shall be a minimum of 18 inches diameter or equivalent. Driveway culverts shall be a minimum of 15 inches diameter or equivalent for residential use and a minimum of 18 inches diameter or equivalent for commercial use. Roof drains, prior to connection to the overall stormwater system, are exempt from minimum diameter requirements.
APPLICANT requests approval for the use of 12 inch and 15-inch yard drains within our stormwater management system. All stormwater conveyance pipes are at least 18" in diameter. Hydraulic calculations are provided to ensure that sizing is sufficient.
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