17.120.035 Critical area reports – Specific requirements for frequently flooded areas.
In addition to the general requirements of SMC 17.114.160, critical area reports for frequently flooded areas must meet the requirements of this section.
(1) Prepared by a Qualified Professional. A critical areas report for a frequently flooded area shall be prepared by a qualified professional who is a hydrologist or engineer and who is licensed in the state of Washington with experience in preparing flood hazard assessments.
(2) Area addressed in critical area report:
(a) The site area of the proposed activity;
(b) All areas of special flood hazard, as indicated on the flood insurance map(s) within 200 feet of the project area; and
(c) All other flood areas indicated on the flood insurance map(s) within 200 feet of the project area.
(3) Flood Hazard Assessment Required. A critical area report for a proposed activity within a frequently flooded area shall contain a flood hazard assessment including the following site- and proposal-related information at a minimum:
(a) Site and Construction Plans. A copy of the site and construction plans for the development proposal showing:
(i) Floodplain (100-year flood elevation), 10- and 50-year flood elevations, floodway, other critical areas, buffers, and shoreline areas;
(ii) Proposed development, including the location of existing and proposed structures, fill, storage of materials, and drainage facilities, with dimensions indicating distances to the floodplain;
(iii) Clearing limits; and
(iv) Elevation of the lowest floor (including basement) of all structures, and the level to which any nonresidential structure has been floodproofed. (Ord. 1486 § 2 (Exh. B), 2020; Ord. 1164 § 4, 2004).