03-20-2000 Planning Packet - Laserfiche WebLink

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w 03/16/00 10:11 0 :01/02 NO:7A5 i, |l Bonestroo Rosene Anderlik & Y\ I Associates Engineers & Architects flonrrf';.**, ^Ojcntf ^na ASSOCl^t^i. /nt H Aff<nn.tf$vi» Action i^uju opportunity- tnpfp/0* Otto G 3o»*» tf sf rc • Jcjsepn c Anuerlib flit • M.Vv.o w Surv.iui Pfc # Glenn J» Cook. PE • P^brrt C Scnwnuht. PC • Jcr*y A Bcurdon PE • .tooen w rfnsrrc Pf P Chi*<’J E Turn«» P€ ir>0$ui«nw Cacriin r. PA Urruot Con%ui(i,niS Afinc’^rc '^'"incfOAtf A Sanford. PI. Keicn A. GorUcn PE « Pooeft I7 P»effer|# p£ • .'f fharj j/ fotte' P£ • DavidO Loskouv Pf • .'Jobtrt C Punen aia • M.irk a Hanson PC. • M»cnae« PC • Ted K.Pieul. PE • Kcnnetn P Andrr;on P| • M^rk R Pr^ifi. pg • ><orty • Jr.li#4imicn. PC L S • PoOcfC P itoumicfi • Agnei M Pmg • Anan «#».► ScrmiOt PC O^TiCrs 5f Pauf. dorrf j?e» Willmar and $f C<0Ud. MN • M««waukOC. W1 U/tL’i/.*r iwv^’.vhnnr j*rnn rf>m March 16. 2000 Mr. Paul Weinberger Zoning Atlminislraior/PUinncr C!iiy of Oiono Post Ortice Box 66 Cry'i'tal Bay, MN 55323 Rc;Walfred Properticb/Snyders Site File No. 139GEN-2567 Dear Paul Wc have reviewed the preliminary grading and uliliiy plan for the propo.sed Snyders site in Nanirrc TIk site IS located un the cast side of Shadywond Road (CSAH I9> and north of Navarre Lane and Shoreline Drive iC.SAH I .^1 We have the following comments in regards to engineering matters: 1.Overall: The scale shown on the plan set I r’=30’) does not agree with the dimensions shown on the drawing (s.aniiary sewer lengths), it appears that the drawing was plotted at some other scale. For this reason we were unable tc> verify such things as piuking lot grades, pipe inverts, pond copocines, etc. Once a revised scalable drawing is submitted we will complete our review. 2.Sanitary Sewer: The existing sanitary sewer is shown through the proposed ponding area. The plans show a proposed realignment of the sewer through this area. The revised alignment shows the sewer approximately 7*feet away from an existing water main where 10-feet is the standard. The sewer should he reUwated outside the normal water level (NWL) of the pond. Plans should be submitted to the Department of Health for their approval. The proposed sewer realignment falls outside the property. Additional land or casements will need to be acquired to construct the pond and sanitary sewer. The sanitary sewer should have a minimum of 6-fect of cover or should be insulated. All sanitary and stonn sewer manholes arc required to have un exterior scaling sleeve as manufactured by Infi-Shield or an approved equal Any connections to existing manholes shall be core drilled and a rubber boot installed. All applicable City Standard Details .should be included in the final plan set. 3.Grading: We recommend that access and parking lot grades not exceed 4*:?:. The proposed design may be within these parameters but we cannot verify until we gel a scalable plan. The proposed retaining walls are nearly 20-fcct tall in some tocation.s Retaining wall design and details should be provided for review. A two tier wall de.sign may be necessary where wall heights approach 20 feet. Some type of barrier w-ill he necessary above the wall in some locations for safety purposes. Di'iiinagv/Honding: As previously stated, the proposed pond lies outside the property boundaries, Uw applicant should provide details as to liow the pond can be constructed and how it may impact the e.xisiing wetland. The pond should be sized according to NURP standards using a 2.5-inch rainfall over the eontnbuting drainage area. Calculations submitted used a 2*inch rainfall and should be revised. The pond will require an outlet structure capable of providing I-foot of skimming as shown in City Standard Detail STO-8A. The pond should be consirucicd in accv>rdance with City Standard Detail STO-12. Pond and siomi sewer calculations should be revised and resubmitted along with a drainage area map. It is uncle;ir where the propo.sed catcli basin on the north side of the site drains to. Riprap should be provided at all outleb. Slorm sewer should be reinforced concrete pipe. Final plans should show plan and profile views 2335 West Highway 36 > St. Paul, MN 55113 • 651-636*4600 > Fax: 651-636-1311 :