HomeMy WebLinkAboutGeoTech Report Reviews for BLD2000-00785 - BLD Engineering / Geo-tech Reports - 8/1/2000 MASON COUNTY
PUBLIC WORKS DIRECTOR/COUNTY ROAD ENGINEER
Shelton,Washington 98584
DATE: Aug. 1", 2000
INTER-DEPARTMENTAL COMMUNICATIONS
TO: Tammi Griffy, PAC —Building Official
FROM: Alan A. Tahja, P/W- Co. Hydr. Engr. PAC WO#2K-0071
SUBJ: Geo-Tech Report Review NAME: James Francis @ Alder Crk Lane
BLD2000-00785
Tammi,
The geotechnical investigation and retaining wall design prepared for the proposed James Francis
shoring design at Alder Creek Lane in Belfair has been received and reviewed by Public Works,
prompting the following comments;
1) A minimum thickness of 12" for granular backfill behind the proposed retaining wall
should be considered a minimum. Backfill material for the completed wall has not been
specified, but should be required to meet the approval of the project engineer.
2) The Uniform Building Code (2306.11) requires wood used in retaining or crib walls to be
treated.
3) Because of the height, it seems prudent to suggest that a fence or barrier should be
incorporated into the top of the wall for protection against someone falling over it in the
dark, or by accident.
Please feel free to contact me at County extension 461 if you have any questions regarding these
comments, or if you feel any features need further discussion or attention.
S'ncerely,
rPz_e11
'Akan A. Tahja
File: H:\WP\GEO\REVIEWS\Francis-wall-IDC.doc
WORK ORDER - PUBLIC WORKS DEPT.
(A) Date: '7 A17-60 (E) Work Order -
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MASON COUNTY
PUBLIC WORKS DIRECTOR/COUNTY.ROAD ENGINEER
Shelton,Washington 98584
DATE: Aug- 2"d, 2000
INTER-DEPARTMENTAL COMMUNICATIONS 2 S 6, 7 n`U'
TO: Allan Borden, DCD—Planner ;� (�
FROM: Alan A. Tahja, P/W - Co. Hydr. Engr. DCD WO#2K-0073
SUBJ: Geo-Tech Report Review NAME: James Francis &Alder Crk Lane
BLD2000-00785
Allan,
Attached Please find a copy of my review comments prepared for this project at PAC's request.
The material submitted by you contained the geotechnical report missing in PAC's materials, but
about the only comment I feel was answered by the additional material was the
specification/recommendation for the wall backfill material.
The geotechnical report and retaining wall designs appear to conform to standards of good
engineering and geotechnical practices for this time and place, and recommendations made in the
geotechnical report should be made conditions for project permitting.
Please feel free to contact me at County extension 461 if you have any questions regarding these
comments,or if you feel any features need further discussion or attention.
Si cerely,
A16 A. Tahja
Encl: IDC review comments to PAC dated Aug. 1 S`, 2000
File: H:\WP\GEO\REVIEWS\Francis-wall-ID2.doc
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