Sammamish Unified Development Code

Uses | Principal Uses

M. Nonresidential use design standards

i. Infiltration of all stormwater generated from the proposed parking lot is required. The director may authorize a reduction in infiltration required if the applicant demonstrates that infiltration is not feasible due to site-specific soil and/or geologic conditions. ii. Required landscaping shall incorporate soil amendments. Soil amendments shall be comprised of a compost or soil amendment mix consistent with the adopted Sammamish Surface Water Design Manual. iii. Incorporate any other low impact development technique required by Sammamish Surface Water Design Manual. b. Incorporate a minimum buffer of 30 feet with a berm around the perimeter of the parking lot where adjacent to public right-of-way and neighboring properties, designed such that the berm height is no less than three feet above the highest elevation of the parking lot. The berm shall be maintained as needed to ensure the berm height is not diminished over time due to erosion or other causes. The director may authorize an alternative design to the berm that will provide an equivalent amount of year-round screening for vehicle headlights and follow Crime Prevention Through Environmental Design (CPTED) principles such as the preservation of forest and additional landscaping. 6. Noise. Civic uses shall be designed to minimize noise impacts on adjacent residential properties such as the use of mature trees, landscaping and other features to minimize noise transfer across properties and using

1. Applicability. This section applies to new nonresidential uses or improvements within the R-1, R-4, R-6, and R-8 zoning designations. Nonresidential uses and improvements include, but are not limited to, those uses specified in SDC 21.04.040F. through SDC 21.04.040 and SDC 21.04.040J. and supporting improvements (e.g., parking lots), or other similar uses or improvements as determined by the director. 2. Purpose. The purpose of this section is to establish standards for the development of civic uses such as schools, churches, community centers, and other similar uses in the R- zones to ensure compatibility with residential development. Civic uses should be designed to minimize impacts on residential neighborhoods from noise, light, visual impacts, and vehicle traffic. 3. Location. New nonresidential uses and improvements shall be located with direct access to a neighborhood collector or arterial street, as defined in the adopted Public Works Standards. 4. Traffic Demand Management. New nonresidential uses shall prepare and adhere to a traffic demand management plan to reduce traffic generation during the a.m. and p.m. peak hours. The traffic demand management plan shall be reviewed and approved by the City. 5. Parking Lots. New parking lots for nonresidential uses, or parking lots that are expanded by more than 50 percent of the original parking lot area, shall:

a. Incorporate the following low impact development design into the parking lot design as follows:

268 | Title 21: Sammamish Development Code

Effective | January 1, 2022

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