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Home My WebLink AboutGeo Assessment Review and Report for BLD2006-01885 - BLD Engineering / Geo-tech Reports - 11/22/2006 MASON COUNTY PUBLIC WORKS DIRECTOR/COUNTY ROAD ENGINEER Shelton, Washington 98584 NC DATE: November 22, 2006 INTER-DEPARTMENTAL COMMUNICATIONS TO: Chuck McCoy PARCEL # 12331-51-00070 FROM: John Sliva, Programs Engineer-PW BUILDING PERMIT NUMBER: BLD2006-01885 SUBJECT: Geo-Assessment Review Hold NAME: Peru Mike Chuck The Geological Assessment prepared for the proposed single family residence at 251 NE Jolly Roger Lane near Belfair was received by Public Works. The assessment was written October 12, 2005. We need a more recent report preferably done within the last six months. A new report is not necessary if conditions have not changed. The applicants engineering firm can send an addendum letter stating that the current report is still adequate. A licensed geologist or a professional engineer must stamp the letter. The Geological Assessment Review is on hold and no further action will be taken by Public Works until we receive what is requested above. Please feel free to contact me at 724 if you have any questions regarding these comments, or if you feel any features need further discussion or attention. Sincerely, John Sliva Programs Engineer �I MASON COUNTY PUBLIC WORKS DIRECTOR/COUNTY ROAD ENGINEER Shelton, Washington 98584 N CO DATE: November 28, 2006 INTER-DEPARTMENTAL COMMUNICATIONS TO: Chuck McCoy PARCEL # 22:205-75-00040 FROM: John Sliva, Programs Engineer-PW BUILDING PERMIT NUMBER: BLD2006-01216 SUBJECT: Geotechnical Report Review NAME: Schintz Jeremy PAGES 2 Chuck: The Geotechnical Report and slope stability analysis addendum prepared for the proposed relocation of an easement road and building of a residence located at 290 Cheyenne Drive near Belfair has been received and reviewed by Public Works. The report was initially submitted as a limited geologic assessment. The October 16, 2006 geotechnical report lacked parts of the slope stability analysis required by the County. On November 27, 2006 an addition or addendum to the existing report was received. The addendum addressed slope stability for the proposed development. The development consists of a single- family residence and associated infrastructure and relocation of an existing driveway. Slope stability was modeled for static and dynamic loading. Safety Factors were 1.88 static and 1 .57 seismic. The report indicates that based on the results of the slope stability analysis, the proposed construction has an adequate factor of safety against slope movement for slip surfaces that might intersect the gravel road or proposed residence. The proposed construction will not decrease the stability of the steep slope. This addendum supports the qualitative analysis presented on the October 16, 2006 geotechnical report. The author notes in the October 16, 2006 geotechnical report that no future impacts on-site or off site are anticipated as long as temporary erosion methods are followed and vegetation is maintained following construction. The combined two reports with addendum appear to meet County requirements for geotechnical reporting. Recommendations contained in the report should be incorporated into the site development plans and made conditions for permit issuance Adequate erosion and sediment control features need to be Implemented during land disturbing activities to protect neighboring properties and State waters from adverse stormwater runoff impacts. The migration or release of silty water or mud from the applicant's property will be considered a violation of County and State water quality protection regulations. Please feel free to contact me at 724 if you have any questions regarding these comments, or if you feel any features need further discussion or attention. Sincerely, John Sliva rograms Engineer MASON COUNTY PUBLIC WORKS DIRECTOR/COUNTY ROAD ENGINEER Shelton, Washington 98584 MC DATE: December 12, 2006 INTER-DEPARTMENTAL COMMUNICATIONS TO: Chuck McCoy PARCEL # 12331-51-00070 FROM: John Sliva, Programs Engineer-PW BUILDING PERMIT NUMBER: BLD2006-01885 SUBJECT: Geo-Assessment Review NAME: Peru Mike Chuck The Geological Assessment and update letter prepared for the proposed single-family residence at 251 NE Jolly Roger Lane near Belfair was received and reviewed by Public Works. The update letter dated November 28, 2006 was requested by Public Works since the initial report was written October 12, 2005. The update letter indicates the site and geologic conditions described in the Geological Assessment Letter, dated October 12, 2005, are unchanged and the Conclusions and Recommendations presented in that letter remain the same. A review of the geological assessment notes that the lot has slopes around 30% south of Jolly Roger Lane. Around 25 to 30 feet from Jolly Lane the slopes increase at a cut but only have 8-9 feet of vertical relief. South of the cut slopes are approximately 20%. Slopes within 250 feet of the site are similar or gentler. No slope instability was observed. The Coastal Zone Atlas maps the site as stable or intermediate. The author notes that in their opinion, the proposed development will not create unstable slope conditions onsite or nearby offsite. The geological assessment appears to satisfactorily address County requirements for a geological assessment reporting. A geotechnical report will not be required based on the author' s comments and recommendations. Recommendations contained in the report should be incorporated into the site development plans and made conditions for permit issuance. Adequate erosion and sediment control features need to be implemented during land disturbing activities to protect neighboring properties and State waters from adverse stormwater runoff impacts. The migration or release of silty water or mud from the applicant's property will be considered a violation of County and State water quality protection regulations. Please feel free to contact me at 724 if you have any questions regarding these comments, or if you feel any features need further discussion or attention. S' rely, John SIiiva ograms Engineer MASON COUNTY PUBLIC WORKS WORK ORDER NOV Z o Zoos MASnN CCUNTYPURj.lCV!u?"': Permit#: Date: Requested by: cOLX Authorized by: Type of Work: eleo fieJtffA-� Public Works employee in charge: CHARGE TO: Name: 1�c Billing Address: Phone: WORK PERFORMED: Employee: Date: Hours: Hourly Rate: Total: ACCOUNTS RECEIVABLE INFO: Billed Date: Invoice #: Amount Billed: Receipt # Date: Amount Paid: