Laserfiche WebLink
Memorandum �Bonestroo <br /> Project: 4725 North Shore Drive z33s H�9nway se w <br /> St.Paul,MN 55113 <br /> To: Darren Amundsen Slope Restoration Date: il/8/10 <br /> Owner: John Roedel Te1651-636-4600 <br /> Fax 651-636-1311 <br /> From: Philip Caswell, P.E. Ciient: City of Orono, MN <br /> www.bonestroo.com <br /> Re: 10-3490 File No:000139-10000-1 <br /> Review Summary: <br /> Revised and supplemental information for the proposed slope reconstruction at 4725 North <br /> Shore Drive has been reviewed and comments are provided below. The information provided <br /> includes the following: <br /> 1. Drawings—Civil Solutions Group, LLC: 1) SITE PLAN <br /> (dated 11-4-10) 2)TYPICAL SLOPE SECTION <br /> 2. Memorandum —Civil Solutions Group, LLC(dated 11-4-10) <br /> 3. Design Calculations—Civil Solutions Group, LLC(dated 11-4-10) <br /> 4. Geotechnical Report Addendum #1 —Northern Technologies, Inc. <br /> (dated 11-4-10) <br /> This information directly addresses the review comments provided following our previous <br /> review (Bonestroo, October 28, 2010). Specifically, these revisions and responses include: <br /> Re: Comment No. 1; The bench cut dimensions have been revised to OSHA Standards, <br /> This is acceptable. We further understand that the work will progress from the slope toe <br /> . upward, so that the exposure of the free-standing vertical cuts will be minimized. <br /> Re: Comment No. Z:As per the geotechnical engineer for this project(Norf�hern Techno%gies, <br /> Inc.)the design parameters for the on site material shall be 500/bs(per sq, ft,)of cohesion <br /> and an internal friction angle of 23 degrees. With this information Civil Solutions Group has <br /> designed the slope using 1.3 safety factor. <br /> This is acceptable. If the certainty of the soil parameters used for the design is considered to <br /> be sufficient, the use of a safety factor of 1.3 is at the discretion of the engineer. � <br /> Re: Comment No. 3: This particular note has been revised to '8"LOW PERMEABLE SOIL <br /> (HYDRO-SEED EROSIDN PROTEG770N AS PER CONTRACTOR SUBMI77"AL). It is understood <br /> - by Civi/Solutions Group that the contractor has previously submilted the erosion protection <br /> p/an. <br /> I have no information re: this submittal, and cannot comment on its acceptability. The <br /> erosion protection of the slope directly affects the stability of the slope, and the proposed <br /> design should be reviewed closely by those familiar with erosion protection of steep slopes. <br />