Exhibit A KCC 17A Revisions - Laserfiche WebLink

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Kittitas County, WA § 17A.04.050 CRITICAL AREAS § 17A.04.050 Downloaded from https://ecode360.com/KI6857 on 2025-05-15 feasible; e. Stream crossings, where necessary, shall be perpendicular with the stream, or as close to perpendicular as possible, and shall be the minimum width necessary. Common or shared crossings are the preferred approach where multiple properties can be accessed by one crossing; and f. Culverts and bridges shall be designed according to applicable state and federal guidance criteria for fish passage as identified in Fish Passage Design at Road Culverts, WDFW, 2003, and/or the National Marine Fisheries Services Guidelines for Anadromous Salmonid Passage Facility Design, 2011, (and subsequent revisions) or WDFW's Water Crossing Design Guidelines (WDFW, 2013). The applicant or property owner shall maintain fish passage through the culvert. 5. Utility facilities. New utility lines and facilities may cross streams or Fish and wildlife habitat conservation areas if they comply with the following standards, and those standards described in KCC § 17A.01.120.4: a. There is no other feasible alternative route with less impact on the Fish and wildlife habitat conservation area; b. Installation at a stream crossing shall be accomplished by boring beneath the scour depth and hyporheic zone of the stream and the entire channel migration zone width, where feasible; c. Where boring under the channel is not feasible. the utilities shall cross at an angle of no less than sixty (60) degrees, but as close to ninety (90) degrees as possible, relative to the centerline of the channel; d. Crossings shall be contained within the footprint of an existing road, bridge or utility crossing where possible; e. The utility route shall avoid paralleling the stream or following a down-valley course near the channel; and f. The utility installation shall not increase or decrease the natural rate of channel migration. 6. Instream structures. Instream structures shall only be allowed as part of a County-approved restoration project. The structure shall be designed to avoid modifying flows and water quality in ways that may adversely affect habitat conservation areas. 7. Stormwater conveyance and discharge facilities. Stormwater conveyance or discharge facilities such as dispersion trenches, level spreaders, and outfalls may be placed within the outer 25% of a standard fish and wildlife habitat conservation area buffer on a case-by-case basis when the Director determines that all the following are met: a. Due to topographic or other physical constraints, there are no feasible locations for these facilities outside the standard fish and wildlife habitat conservation buffer; b. The discharge is located as far from the ordinary high water mark (OHWM) as possible and in a manner that minimizes disturbance of soils and vegetation; c. The discharge outlet is located in the outer 25% of the standard buffer and is designed to prevent erosion and promote infiltration; and