17.10.072 Stream report – Requirements.
A. Preparation by Qualified Professional. If required by the director, the applicant shall submit a stream report prepared by a qualified professional as defined herein.
B. Area Addressed in Critical Area Report. The following areas shall be addressed in a critical area report for streams:
1. The project area of the proposed activity;
2. All streams and recommended buffers within 200 feet of the project area; and
3. All shoreline areas, water features, floodplains, and other critical areas, and related buffers within 200 feet of the project area. The location and extent of streams and other critical areas existing outside of the project area or subject parcel boundary may be shown in approximation as practical and necessary to provide an assessment of potential project effects.
C. Stream Analysis. In addition to the minimum required contents of LMC 17.10.040, Submittal requirements, a critical areas report for streams shall contain an analysis of the streams, including the following site- and proposal-related information at a minimum:
1. A written assessment and accompanying maps of the streams and buffers within 200 feet of the project area, including the following information at a minimum:
a. Stream locations showing the ordinary high water mark(s), and required buffers;
b. Stream type;
c. Vegetative, faunal, and hydrologic characteristics;
d. Soil and substrate conditions;
e. A discussion of the water sources draining to the stream; and
f. A description of the proposed stormwater management plan for the development and consideration of impacts to drainage alterations.
The location, extent and analyses of streams not contiguous with the subject parcel existing outside of the immediate project area may be described in approximation as practical and necessary to provide an assessment of potential project effects and hydrologic/ecological connectivity to on-site streams, wetlands and other critical areas.
2. A discussion of measures, including avoidance, minimization, and mitigation, proposed to preserve existing streams and riparian corridors and restore any streams that were degraded prior to the current proposed land use activity.
3. A detailed description and functional assessment of the stream and stream buffer under existing conditions pertaining to the protection of stream functions, fish habitat and, in particular, potential anadromous fisheries.
4. A habitat and native vegetation conservation strategy that addresses methods to protect and enhance on-site habitat and functions.
5. Proposed mitigation, if needed, including a written assessment and accompanying scale maps/drawings of the impacts and mitigation site and adjacent areas consistent with LMC 17.10.075.
D. Unless otherwise provided, a stream report may be supplemented by or composed, in whole or in part, of any reports or studies required by other laws and regulations or previously prepared for and applicable to the development proposal site, as approved by the director. A stream report may also be combined with a wetland report for sites that contain both critical areas. (Ord. 3193 § 2, 2016)