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Home My WebLink AboutResolution 15-042 Exhibit C - Herrera Executive Summary Exhibit omResolution /n-04 Herrera Executive Summary Page /or4 �� J, ��0�� The City ofPort Townsend is mandated by the Growth Management Act ofWashington (GMA) to review and update its comprehensive plan and development regulations according to RCVV 36.70A.130(5). This update must include a review and update ofcritical area regulations per R[VV 36.70A.130(1)(c). If the review shows that the pian or regulations do not comply with theG/0A, then revisions must be made. The review mfcritical area regulations under RCW 36.70A.172(l) must be based on best available science (BAS) and give consideration to conservation and protection ofmnadromousfisheries. This documen1'yervesesan addendum tmthe ZO05 8A5 review (GeoEngineern2UO5) produced for the City's ZOO5 Shoreline Master Program update and provided in Appendix A. Critical areas recognized bythe City, and therefore addressed 1n this addendum, include wetlands, fish and wildlife habitat conservation areas (which include streams), critical aquifer recharge areas, frequently flooded areas, and geologically hazardous areas. In addition, discussions of climate change, sea level rise and tsunami hazards are included. In general, the City's critical areas regulations are compliant with BAS recommendations for protection mfcritical areas and public health and safety; however, some changes are required and updates are recommended. Table ES'1 provides esummary mfrequired changes (shown in bold) and recommended updates for specific critical area regulatory elements covered in this report. These code changes and recommended updates are discussed in more detail within the main body ofthe report. Table ES-1. Recommendations for Certain Critical Area Regulatory Elements for the City of Port Townsend. Compliant with Best Available Critical Area R,e,qulat1orY,Element Science' 1111,11,11, Notes Wetlands Rating System No RCW 36.70A.030(21)requires that all wetlands that meet the biological definition be regulated and any impacts be compensated for;therefore,all wetlands must be regulated regardless of size.All wetlands:5 1,000 sq.ft. must be treated as regulated wetlands. As of January 1,2016,the City is required to use the"u-p1dated,20114 wethand rating system. Buffers Yes Update to the revised 2014 point-scaling Consider updating buffer width regulations to use the simpler table provided in Ecology's guidance for small cities(Ecology 2012). E��0�� V �� n` Exhibit C to Resolution 15-042 Herrera Executive Summary Page 2 of 4 Table - (continued). Recommendations for Certain Critical Area y Regulatory Elements for the Cit of Port Townsend. Compliant with t Best Available �( _........ a Recommendations InnNotes Critical Area Re ulato Element Science Wetlands Delineation Method No Update PTMC 19.05.110.8.3 to require use of (continued) the 1987 Corps of Engineers Wetlands Delineation Manual and all applicable guidance that is not superseded by the Western Mountains,Valleys,and Coast Regional Supplement.See Section 4.2.1 for details. Update to indicate the wetland delineations are applicable for the standard 5 years, instead of 3. . .... Mitigation Yes Follows standard procedures and recommended Requirements mitigation ratios. Ecology(2012)provides a more specific list of mitigation report requirements than is provided in PTMC and the City may want to update accordingly. The City may want to allow use of the credit/debit method as an alternative to mitigation ratios as described in Calculating Credits and Debits for Compensatory Mitigation in Wetlands of Western Washington.:Final Report(Hruby 2012) ._ . , _ , Stream Fish and Rating System No State law requires the use of the WDNR Wildlife Habitat stream typing system identified in Conservation WA 222-16-031. Area(FWHCA) Update PTMC 19.05.080.8.7 to include all Waters of the State not just those associated with certain species as per WAC 365-190-130(2)(f). Clarify that not all streams are critical drainage corridors as defined under 19.05.020 Definitions. Request WDNR re-evaluate those mapped streams that are ephemeral and lack outlets to marine water bodies to determine whether they are, in fact, streams and potentially fish bearing. Buffers Yes City uses WDFW recommended stream buffers from Knutson and Naef(1997). Mitigation Yes Recommend that stream mitigation should Requirements identify a stream for stream as a first mitigation preference. HER EUSA vo pli 1A069s, 0 ix,;l,ld;llll lel tlnrtr oil J ,a Exhibit C to Resolution 15-042 Herrera Executive Summary Page 3 of 4 ............- ........... .......... Table ES-1 (continued). Recommendations for Certain Critical Area Regulatory Elements for the City of Port Townsend. ........................... Compliant with Best Available Critical Area Regulatory e Science' Recommendations/Notes ................ Stream Fish and Protection Measures Yes Consider and clarify whether dunegrass Wildlife Habitat communities are a habitat of local importance in Conservation accordance with WAC 365-190-130(2)(b) Area(FWHCA) Consider and clarify whether dunegrass (continued) communities constitute"associated vegetated marine riparian areas" regulated by PTMC 19.05.080(8)(10). Define"associated vegetated marine riparian areas"to clarify whether the protected areas are limited to within the marine nearshore habitat area(between extreme low tide and the ordinary high water mark), or could occur in riparian areas adjacent to the delineated nearshore area. Critical Aquifer Protection Measures Yes Update 19.05.070. D.5 and all other PTMC Recharge Areas references to the Low Impact Development (CARA) Technical Guidance Manual for the Puget Sound (2004)to 2012 LID Technical Guidance Manual for Puget Sound(WSU and PSP 2012), and Rain Garden Handbook(Ecology et al. 2013). I Remove requirement for a hydrogeologic assessment for a domestic underground propane tank in 19.05.070.C. Frequently Protection Measures Yes Remap critical drainage corridors using recently Flooded Areas collected lidar information. References to the 2001 Stormwater Management Manual for Western Washington in the critical areas code should be updated to the 2012 manual or to the current manual used by the City. I Geologic Hazards Engineering Design Yes Expand"qualified consultant"definition to specify Standards that all shoreline projects on the Strait(those I within 200 linear feet of the marine OHWM west of Point Wilson)be reviewed by a licensed engineer with coastal experience specifically related to open ocean swell. Require all engineering plans within a mapped tsunami and/or high liquefaction zone to carry a stamp indicating the plans are being made in a tsunami and/or high liquefaction zone. Encourage local relevant scientific agencies (WDNR, USGS)to evaluate tsunami risk from a slip of the South Whidbey Island Fault Zone. Encourage the use of setbacks rather than new armoring or other shoreline stabilization to protect property and infrastructure from sea level rise ...................... ........... ........ ——.... ......... vii R R 1'R A -— ----------------- . ..... Exhibit C to Resolution 15-042 Herrera Executive Summary Page 4 of 4 Table -1 (continued). Recommendations for Certain Critical Area l tory Elements for the City of Port Townsend. � .. ........ sosososo ��.-� Compliant with Best Available Critical Area Reulato Element Sciencea Recommendations I Notes and wave energy increases, Encourage removal of existing armoring. Require projects located less than 15 feet NAVD88 in elevation to use USACE guidance with respect to sea level rise(USACE 2013)for adequately designed stormwater facilities a If only an update is required it is given a yes for compliance Bold items are required for compliance with the GMA. H RREIRA � Wilk N4i N WNAN°.Faro Nv h",Wuborridwnv ImI4 N411irr ?WhJrrq:.a.