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Home My WebLink About2019-02-25 PACKET 06.1.STAFF REPORT CASE: PP19-010, SP1 9-007, CUP19-008, V19-009 ITEM: 6.2 PUBLIC MEETING DATE: 2/25/19 TENTATIVE COUNCIL REVIEW DATE: 3/20/19 APPLICATION APPLICANT: City of Cottage Grove and Airgas, an Air Liquide Company REQUEST: A preliminary plat for a subdivision to be called Lake Flora Addition, which will be located on 43.71 acres of land north of 100th Street and east of Glendenning Road. This plat will create two commercial/industrial lots and two outlots. A site plan review and conditional use permit for the develop- ment of an industrial processing facility (air separation plant), which will be approximately 17,000 square feet, and related processing equipment, parking, and utilities on an 8.5 -acre parcel of land; and a variance to the City's architectural requirements for exterior building materials. SITE DATA LOCATION: North of 100th Street and east of Glendenning Road ZONING: 1-3, General Industry GUIDED LAND USE: Industrial LAND USE OF ADJACENT PROPERTIES: CURRENT GUIDED NORTH: Industrial Industrial EAST: Agricultural Industrial SOUTH: Agricultural Industrial WEST: Industrial Industrial SIZE: 43.71 acres RECOMMENDATION Approval, based on the findings of fact and subject to the conditions stipulated in this staff report. G COTTAGE GROVE PLANNING DIVISION here P,ide and Prosperity Meet Planning Staff Contact: John M. Burbank, Senior Planner; 651-458-2825; iburbank(o)_cottagegrovemn.gov Application Accepted:. 1/29/2019 60 -Day Review Deadline: 3/30/2019 City of Cottage Grove Planning Division • 12800 Ravine Parkway South • Cottage Grove, MN 55016 Planning Staff Report Airgas Site Development Planning Case CP2019-007, V009 February 25, 2019 Proposal Airgas, an Air Liquide Company, has filed the following applications for a development on an 8.5 - acre parcel of land located on the northeast quadrant of Jamaica Avenue and 100th Street: 1. A site plan review for the development of an industrial processing facility (air separation plant), which will be approximately 17,000 square feet, and related processing equipment, parking, and utilities. 2. A conditional use permit to allow for the construction of 130 -foot high and 160 -foot high cold box towers related to the proposed manufacturing use when 60 feet is the maximum building height in that zoning district. 3. A variance to the City's architectural requirements for exterior building materials. In order to facilitate this development, the City of Cottage Grove applied for a preliminary plat for a subdivision to be called Lake Flora Addition, which will be located on 43.71 acres of land north of 100th Street and east of Jamaica Avenue. The plat will create two industrial lots and two outlots. \\t i NVKSrFOINTO�,� 11ni sTs Y G fi sa( m SITE 1 OTH S7 5. Location Map Planning Staff Report Airgas Site Development February 22, 2019 Page 2 of 17 Site Plan Background In 2017, the City of Cottage Grove Economic Development Authority (EDA) worked to certify over 50 acres of land through Xcel Energy's Shovel Ready Certification Program for potential industrial businesses. In August 2018, Airgas USA contacted Xcel Energy for potential sites to expand their opera- tions in the Midwest market. Specifi- cally, Airgas USA was looking to build an Air Separation Plant to produce liquid oxygen, nitrogen, and argon that are used in many industrial and medical facilities. Figure 1 shows an example of an air separation plant y f�as they currently operate in Kentucky. The applicant reports that they have M..Q a robust safety program and record 11 Figure 1: Example of an air separation plant in Carrolton, KY and that the odorless, non -hazardous cryogenic products are in a closed loop system not released Planning Staff Report Airgas Site Development February 22, 2019 Page 3 of 17 to the atmosphere. Through the manufacturing process, no water is polluted nor are noticeable fumes, dust, vibrations, or disturbing noise created. Existing Property Characteristics The 43.71 -acre parent parcel is encumbered by a portion of historic Lake Flora, the 14 -acre dog park, and two utility easements. The site also contains a wetland area and varied topography. The site is currently leased out for small crop farm production. Site Orthophoto Detail Zoning The proposed use of the site for an Air Separation Plant (ASU), which is the process of taking air from the atmosphere and through the process of cooling and pressurizing that air, separates the air into liquid oxygen, nitrogen, and argon which is then used in various industrial and medical uses. Currently the site is zoned, 1-3, Heavy Industrial, but the use does require a conditional use permit (CUP) per the City's zoning ordinance (City Code 11-11-2). Additionally, the process of separating the air and turning the various elements into liquid requires the construction of a 160 - and 130 -foot cold boxes. This height exceeds our current ordinance requirements (City Code 11- 11-4) and will be a condition of approval. Conditional Use Ordinance Criteria The conditional review permit request is to allow per ordinance height exception criteria for two structures on the site to exceed the maximum structure height of 60 feet. There are two buildings Planning Staff Report Airgas Site Development February 22, 2019 Page 4 of 17 on the site; the compressor building and the office/mechanic building. They are respectively 20 and 30 feet in height. There are two proposed cold box towers that are required for the air sepa- ration process that are 130 feet and 160 feet in height. When reviewing CUP applications, the Planning Commission must review the application for con- formance with the following criteria established by City code: Title 11-2-9F. Title 11-2-9F Criteria for Issuance Of Permit: 1. The use will be in conformity with the City's Comprehensive Plan and with the purpose, intent and applicable standards of this Title. 2. The use shall be located, designed, maintained and operated to be compatible with the existing or intended character of that zoning district in which it is located. 3. The use shall not depreciate values of surrounding property. 4. The use shall not be hazardous, detrimental or disturbing to present and potential surrounding land uses due to noises, glare, smoke, dust, odor, fumes, water pollution, vibration, general unsightliness or other nuisances. 5. The use shall generate only minimal vehicular traffic on local streets as defined by the transpor- tation element of the Comprehensive Plan. The use shall not create traffic congestion, unsafe access or parking needs that will cause inconveniences to the adjoining properties. 6. The use shall be served adequately by essential public services, such as streets, police, fire protection and utilities. 7. The use shall not create excessive additional requirements at public cost for public facilities and services and shall not be detrimental to the economic welfare of the City. 8. The use shall preserve and incorporate the site's important natural and scenic features into the development design. 9. The use shall cause minimal adverse environmental effects. 10. The use shall not adversely affect the potential development of adjacent vacant land. The City's Technical Review Committee reviewed the application based on the above. None of the attending City Department representatives had any adverse comments or recommendations for the application. Site Plan The proposed improvements to the site include the construction of a 6,075 square foot single story, 20 -foot tall building with office (2,560 square feet) and a vehicle maintenance area (3,515 square feet). A larger unoccupied 32 -foot tall compressor building sized at 10,736 square feet is also planned. This building contains an air compressor and related equipment for air separation production. The two proposed cold box towers on the site would be 130 feet and 160 feet in height. The CUP for this application is related to the structure height of the proposed cold box towers that Planning Staff Report Airgas Site Development February 22, 2019 Page 5 of 17 are above ordinance criteria. The heights of the proposed cold box towers are unique in that they are related to the requirements of the manufacturing process and have a valid function in the process. Airgas would need an approval of the height of these cold box towers in any community in which they would operate, since the height is related to the production and not for aesthetic reasons. Setbacks The proposed setbacks for the project are detailed in the table below: SETBACK TABLE Setback Area Building Proposed Building Required Parking Proposed Parking Required Front Yard 100 feet 100 feet 100 feet 100 feet Side Yard 50 feet 50 feet 30 feet 30 feet Rear Yard 60 feet 60 feet 30 feet 30 feet CRba9 BRACE I I I I I I I I I I I i QFFIdE AREA TRUCK MAIC TENANCE 2.66A SF SAW SF CONDITIONED SPACE HEATED ONLY I I III UN SIX _ k— TRENCH +I I TDAMN MEN uNistx I — — —J3 — — — — I I I fiUUM PC 11 I I I I I I I I VLH I ICAL x-tlI 2,560 Square Foot Building Floor Plan Planning Staff Report Airgas Site Development February 22, 2019 Page 6 of 17 Utilities The property is within the Metropolitan Urban Service Area (MUSA). A water trunk extension will be required from the intersection of Jamaica Avenue and 100th Street that will be extended by the City of Cottage Grove. The sanitary system will tie in to the existing trunk service that crosses the site. Map of existing utilities (water=blue, sewer -green) at the site. Access and Traffic Access to the site is via 100th Street. An additional secondary emergency access is proposed on the north of the site onto the unimproved Glendenning Road. The roadways, both Jamaica Ave- nue and 100th Street adjacent to the project, were designed to accommodate the anticipated traffic generated from the proposed project. Parking A total of 17 parking spaces are proposed for the project. The applicant's narrative explains the parking needs of the site. 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E.7J ......_...._ .................... .f - T ............. ... .................... x I ^..^v^ -^ter 5 t n mil:`::'.'.'_.'.'." � ��,:: —d. EL I — 44} JE} x .:. EF _ s, .. i T � �` B3 III I , �SdT 5d5 7:. Al —EL ri 61 lli FE E - TE 4-- I - I L -T- - — 111 ' I c�PRXlla3uuns WrH sr 779fi .�bi.i E�SI, •'1 '% it ie T 1-141 Uk �i { "4�a - I' -11141 1 e: 'S!P -IIT "_ } I 9 JT t 5 in, I_Xal Oh V�J_JR1k 29,3P4{F A` TH LI E F - TH'V F fi IN pq4 l ErI IE IT UE E Ri F TT- E E E- I E Grading Plan Planning Staff Report Airgas Site Development February 22, 2019 Page 8 of 17 Surface Water Management A surface water management plan has been submitted, and the review comments are included in the February 15, 2019, memorandum from Bolten & Menk. A recommendation to this report is that the comments found in the memorandum be met prior to the building permit application. Wetland The South Washington Watershed District requires a wetland buffer averaging 100 feet in width. The established wetland buffer shall be protected from negative impacts and encroachments at all times. Tree Mitigation The tree removal on the site does not exceed the tree mitigation requirements per the City Code. Landscaping The narrative on the site landscaping as found in the plan set is detailed below. - COTTAGE GROVE LANDSCAPE CODE SUBMITTED LANDSCAPE PLAN MUST FULFILL THE MINIMUM FOLLOWING REQUIREMENTS: PLANTING #'S BASED ON SITE AREA MULTIPLIED BY COEFFICIENTS TOTAL SITE AREA X TREE TYPE COEFFICIENT PRELIMINARY 379,886 x .0001392 = 53 SHADE TREES .0001300 = 49 CONIFERS .00039 = 148 LARGE SHRUBS .00039 = 148 SMALL SHRUB ALL PERIMETER AREAS OUTSIDE CURB TO BE SEEDED WITH NATIVE SEED MIX REQUIRE❑ PLANTING MATERIAL PLANT TYPE REQUIRED PROVIDED SHADE TREES 53 54 CONIFERS 49 + *10 59 ORNAMENTALTRLES 0 **15 LARGE SHRUBS 148 96 SMALL SHRUBS 148 0 *SHRUB PLANTING REQUIREMENT TO BE MET BY PLANTING ADDITIONAL 6' EVERGREENS FOR SCREENING AT 20:1 RATIO IN LIEU OF SMALL SHRUB REQUIREMENT FOUNDATION PLANTINGS NOT APPLICABLE TO INDUSTRIAL PROPERTY 200 SHRUBS REQUIRED BUT NOT PLANTED = 10 ADDITIONAL EVERGREENS **ORNAMENTAL TREES PLANTED UNDER POWER LINE ON WEST PROPERTY LINE BECAUSE OF HEIGHT LIMITATION/ OVERHEAD ELECTRICAL Landscaping Quantity Narrative Planning Staff Report Airgas Site Development February 22, 2019 Page 9 of 17 I } I Map fi.. a, S. FTUE F —-L Lilt -E F- E ELE eL-. u e m e -E LT VS 5'C—ON H -B - 4 " is I 1 4 ate ;�,•_ sr � � ,fJs}a;141 SECT ORY A # —k ' • 7 L1 U.r" I E -Ra F elf -E a E,. - - Landscape Plan Planning Staff Report Airgas Site Development February 22, 2019 Page 10 of 17 The applicant has provided a detail identifying landscaping height at installation and at maturity. Landscaping Height/Screening Detail As part of the landscape plan, Airgas will be installing not only extensive landscaping but will also install a six-foot tall, 100 percent opaque fence that will also serve as additional screening of the site. The fencing will also create a security gate across the front drive aisle into the site as well for screening. Landscaping as shown above will be extensively planted to assist with the visual look of the site. Example of Site Fencing Architecture There are two buildings that are located on the site of the air separation plant. Both buildings sit to the north side of the parcel and away from the entrance to the site on 100th Street — the com- pressor building and the office and maintenance shop. The compressor building houses all the equipment used to operate the cold box towers and the batching tanks. There are numerous pipes DARKER TREES AT INMAL INSTALLA71ON muco+,u�wi<s 1 ouTNNE 0.i LTR YFARS GROVRN ' E[IGE OF PAVEMENT EDGE OF PAVEMENT Ed0— np wa— ND CD AEET mIlTN Rl�v '/dF Ev'RIWrtp M'AY wWmNGeYFFFR EIEY.VAR16 EMEMYRED FPEJM W�5IERM GLDApxG sro_ ROLF APOPO%TSr APRRpx TBr COYPFq�OR xuIEG'Ay CODUMR AF RG%T89 APNIDY IOW€R GOx :+NG 9RG APP9O%]13 E TI:)N 4-A I(NOL�TH-SOUTH; oVERNEAO urILITY RTG— RN]— EDGE OF vAVEMENr EDGE OF PAVEMENT xux x Rio— R10— _LUST_ w— H.— E' PERIMETER PENCE cr �v��. ncnc F_FY. TRS s'ARIFS 6' BERIMEfER EEIK. rAPMxs.ARPPuaaxr. EIEV•PE� -�� $ � M3D' FRAM PCWERLINEF if FS ORNAMEA'TWCOWMNAR TREES E TI R -U (',';E -,T -EAST' Landscaping Height/Screening Detail As part of the landscape plan, Airgas will be installing not only extensive landscaping but will also install a six-foot tall, 100 percent opaque fence that will also serve as additional screening of the site. The fencing will also create a security gate across the front drive aisle into the site as well for screening. Landscaping as shown above will be extensively planted to assist with the visual look of the site. Example of Site Fencing Architecture There are two buildings that are located on the site of the air separation plant. Both buildings sit to the north side of the parcel and away from the entrance to the site on 100th Street — the com- pressor building and the office and maintenance shop. The compressor building houses all the equipment used to operate the cold box towers and the batching tanks. There are numerous pipes Planning Staff Report Airgas Site Development February 22, 2019 Page 11 of 17 that will come in and out of the building and connect to the cold box towers and batching tanks. This allows for the essential operation of the air separation plant. The second building consists of a few offices and the maintenance shop where minor repairs will take place at the plant. With both buildings located to the north end of the site, only portions of the office/maintenance shop will potentially be visible from eastbound 100th Street. Airgas has incorporated approximately 20 per- cent of Class 1/2 materials on the east and south facing sides of the building which would poten- tially be visible from 100th Street. Site Prospective from 100th Street South Entry Driveway Building Elevation Details Variance Per the zoning ordinance, any development is required to meet the City of Cottage Grove's archi- tectural standards (11-6-13). The requested variance for this project is related to the exterior building materials. The City Ordinance states that the City Council may grant variances from the strict application of the Zoning Ordinance and can impose conditions and safeguards on the variance. In considering ----C--L--------4 �I�-- �m GM T g T T 'I. .1J I--! �._- --- ! - - - - - - _ -- �------- i- - _ i -- r „v. Building Elevation Details Variance Per the zoning ordinance, any development is required to meet the City of Cottage Grove's archi- tectural standards (11-6-13). The requested variance for this project is related to the exterior building materials. The City Ordinance states that the City Council may grant variances from the strict application of the Zoning Ordinance and can impose conditions and safeguards on the variance. In considering Planning Staff Report Airgas Site Development February 22, 2019 Page 12 of 17 variance applications, the effect of the proposed variance upon the following issues should be considered: 1. The health, safety and welfare of the community; 2. Traffic conditions; 3. Light and air; 4. Danger of fire,- 5. ire,5. Risk to the public safety; 6. The effect on values of property in the surrounding area, and 7. The effect of the proposed variance upon the Comprehensive Plan. Findings of fact in support of the variance include that the public view of the exterior of the build- ings is minimal due to the setback from 100th Street, the extensive landscaping and surrounding fencing of the site so that the majority of the site will not be visible, and the site is not located near any residential development nor will be in the future. The Applicant has provided illustrations on the structure heights from several surrounding perspectives. VIEW FROM GLENDENNING B 100TH STREET SOUTH ENTRYGRIVEWAY VIEW FROM JAMAICA AVEN LEE AERIAL LOOKING NORTHEAST Height Perspective Detail 1 Planning Staff Report Airgas Site Development February 22, 2019 Page 13 of 17 Waft NEW 3- FRDM FIRST ROW OF TREES 12G' MILE AWAVI Amp- -law' VI E'ff 4 - FROM MENARDS ' 112 MILL A'WAl" Preliminary Plat VIEW 2. FROM MIDDLE ROW OF TREES (0-8 MILES AWAY) VIEW MAP Height Perspective Detail 2 Lake Flora Addition The preliminary plat would create Lot 1, Block 1, which is the developing parcel that would be 8.5 acres in size; Lot 2, Block 1 holds the existing farm access drive; Outlot B for surface water management purposes, and the balance of acreage as Outlot A for future development. LAKE FLORA I I - I I I jOUTLO J A ---------- -- � � I I Preliminary Plat I I I I I I � I I I I I I OUTLOTB I I Ili I � I I LOT I BLOCKI I I I I I I- , I I Planning Staff Report Airgas Site Development February 22, 2019 Page 14 of 17 Easements The proposed plat includes standard perimeter drainage and utility easements, and there is a drainage and utility easement over Outlot B in its entirety. Right -of -Way The proposed plat includes a segment of platted right-of-way encompassing 100th Street that will be dedicated to the City. Final Plat A final plat application has also been filed with the City and will be reviewed by the City Council in March. Recommendation That the Planning Commission recommend that the City Council approve the following subject to conditions; 1. A preliminary plat for a subdivision to be called Lake Flora Addition, which will be located on 43.71 acres of land north of 100th Street and east of Jamaica Avenue. This plat will create two industrial lots and two outlots. 2. A site plan review for the development of an industrial processing facility, which will be approx- imately 17,000 square feet, and related processing equipment, parking, and utilities. 3. A conditional use permit to allow for the construction of 130 -foot high and 160 -foot high cold box towers related to the proposed manufacturing use when 60 feet is the maximum building height in the zoning district. 4. A variance to the City's architectural requirements for exterior building materials based on the following findings: Public view of the exteriors of the compressor and office/maintenance buildings is limited from Jamaica Avenue and 100th Street. Conditions of Approval Site Plan Conditions 1. Final architectural plans, lighting, and exterior construction materials and colors must be re- viewed and approved by the Planning Department prior to the issuance of a building permit. 2. All applicable permits (i.e.; building, electrical, grading, mechanical, right-of-way) must be completed, submitted, and approved by the City prior to the commencement of any construc- tion activities. Detailed construction plans must be reviewed and approved by the Chief Building Official or City Engineer. 3. Prior to submittal of the building permit application, all comments related to the civil, site, utility, landscaping, grading, and building construction plans must be addressed and plans revised accordingly. Planning Staff Report Airgas Site Development February 22, 2019 Page 15 of 17 4. Prior to the issuance of a certificate of occupancy, the applicant shall submit as -built survey plans in electronic format (pdf and dwq) for the site grading and all public and private utilities. 5. The engineering comments identified in the attached memorandum from Bolten & Menk dated 2/15/2019 shall be complied with prior to issuance of building permits. 6. Water main, sanitary sewer, and storm sewer improvements shall be constructed per City of Cottage Grove detail plates. 7. Any modifications to City utilities located on-site shall be at the full cost of the applicant. 8. Prior to the issuance of a building permit, public drainage and utility easements shall be ded- icated over all surface water storage areas, cross site conveyance routes and underground water utility infrastructure. 9. The final grading and erosion plan shall be approved by the City engineer. The grading and erosion control plan for the site must comply with NPDES II Permit requirements. Erosion control devices must be installed prior to commencement of any grading activity. Erosion control must be performed in accordance with the recommended practices of the "Minnesota Construction Site Erosion and Sediment Control Planning Handbook" and the conditions stipulated. 10. The grading plan and site grading of the property shall be consistent with the approved surface water management plan. 11. Temporary easements and restoration shall be required for planned grading on Outlot A. 12. All concrete and bituminous surfaces on the site must be maintained in good workmanship like condition at all times. 13. All fencing on the site shall be constructed with materials meeting the ordinance criteria related to commercial fencing. 14. Irrigation shall be provided for all sodded and landscaped areas including the curbed land- scaped islands interior to the parking lot. The irrigation system shall consist of an underground sprinkling system that is designed by a professional irrigation installer to meet the water requirements of the site's specific vegetation. The design build system shall cover all the disturbed green spaces and extend to the street curbs. 15. Landscaping on the site must be maintained in good health at all times, and dead plantings shall be replaced in a timely manner. 16. A light matrix study shall be completed and submitted with the building permit application. All outdoor lighting must meet City Code requirements. All light fixtures must be downward di- rected with cut-offs. The specifications of all light fixtures must be provided with the application for a building permit. Planning Staff Report Airgas Site Development February 22, 2019 Page 16 of 17 17. Fire hydrants shall be placed as per the approval of the City's Fire Marshal, City Engineer, and Public Works Department. In addition to granting public drainage and utility easements over the water pipe infrastructure, the applicant shall guarantee the City's ability to access the fire hydrants to flush the water system. 18. Parking related to the use on the property on Glendenning Road, and 100th Street is pro- hibited. 19. The applicant has provided demonstrated parking on site. If parking is not adequately pro- vided on site to meet the user needs, then the proof of parking shall be constructed upon written notification from the City. 20. Trash and recycling containers must be stored indoors or in enclosures meeting City ordi- nance criteria. 21. All rooftop and at -grade mechanical equipment shall be screened from public view as reviewed and approved by the Community Development Department. 22. As a component of the site plan review, a comprehensive sign package shall be submitted for review and approval by the City. Signage is prohibited on all towers and tanks that occur on site. 23. The applicant shall obtain a right-of-way permit from the City for any grading activity com- pleted on public right-of-way. 24. The applicant shall obtain a temporary construction easement from the City for any grading activity completed on public right-of-way. 25. The restoration plan for all public right-of-way disturbed by grading activity shall be at the direction of and meet the approval of the City Engineer. 26. The established wetland buffer shall be protected from negative impacts and encroach- ments at all times. Platting Conditions 27. All drainage and utility easements required by the City Engineer shall be dedicated to the City and recorded on the final plat. 28. Outlot B shall be dedicated to the City via Warranty Deed. Variance Conditions 29. The building exteriors shall meet the plan requirements detailed on the building elevation plan from Edward Farr Architects, Inc. dated 1/29/2019. Conditional Use Conditions 30. The site shall be in compliance with all required Federal Flight Agency regulations in rela- tion to the structure heights. Planning Staff Report Airgas Site Development February 22, 2019 Page 17 of 17 31. All towers or other structures on site that exceed current City of Cottage Grove code for max- imum height (60 feet) shall be painted to match the City of Cottage Grove standard water tower paint color, which is currently cumulus. The standard water tower paint color shall be obtained from the City of Cottage Grove City Engineer or Public Works Department. 32. All towers or other structures on site that exceed current City of Cottage Grove maximum height requirements (60 feet) shall be spot painted every five (5) years and receive a full painting every fifteen (15) to twenty (20) years. 33. Signage, logos or other non -regulatory markings are prohibited on the cold boxes. Prepared by: John M. Burbank, AICP Attachments: • Applicant Narrative • Civil Plans — dated 1/29/2019 • Building Elevations • Site Line Analysis 1 • Site Line Analysis 2 • Preliminary Plat — Lake Flora Addition • Engineering Comment Memorandum from Bolten & Menk dated 2/15/2019 The Parties Current Owner: Applicant / Buyer: Civil Engineer & Narrative for Airgas 1101h St. S. at Glendenning Rd., Cottage Grove, MN January 29, 2019 City of Cottage Grove Airgas Landscape Architect Sambatek Architect: Edward Farr Architects Site and Zoning Information Existing Lot Area: 43.7 acres DECEIVED JAN 2 9 2019 CiTy OF COTTAGE GROVE Proposed Lot Area: 8.54 acres Zoning: 1-3 Heavy Industrial (no change proposed) Min. Building Setbacks: Front = 100 ft, Rear = 60 ft, Side = 50 ft. (proposed compliance) Min. Parking Setbacks: Front = 100 ft, Rear— 30 ft, Side = 30 ft. (proposed compliance) Max. Building Height: 60 ft (Buildings 20 ft and 32 ft; Distilling Towers 130 ft & 160 ft) Max. Building Coverage 50% (5% proposed) Company Overview Airgas, an Air Liquide company, is the nation's leading single -source supplier of gases, welding equipment, and safety products. They were founded in 1982 and headquartered near Philadelphia, PA. They specialize in industrial, medical and specialty gases. This facility will manufacture and distribute oxygen, nitrogen and argon gases; and operate 24 hrs a day, 7 days a week. Applications Site Plan Review on 8.54 acres, with a variance request for building materials; and Conditional Use Permit on 8.54 acres for building height up to 160 ft. Facility Description and Design: The facility includes multiple elements and structures: 1. Main Office / Vehicle Maintenance Building — a 6,075 sq ft x 20 ft tall single story building containing 2,560 sq ft of office area and 3,515 sq ft of vehicle maintenance area. This building will have 'Cool Solar White' color prefinished metal siding (Class 4) and reddish -brown simulated face brick wainscoting (Class 1 / 2) wall finishes with a 'Cool Shell Grey' color prefinished standing seam metal roof. See Building Elevations. 2. Compressor Equipment Building — a 10,736 sq ft x 32 ft tall single story building, unoccupied; containing a 12,000 hp motor for a nitrogen compressor, a 4,000 hp motor for an air compressor and related equipment. This building also has 'Cool Solar White' prefinished metal siding (Class 4) wall finish with a'Cool Shell Grey' prefinished standing seam metal roof. See Building Elevations. 3. Two Air Distillation Equipment 'Cold Box' Towers — each 150 sq ft; one is 130 ft tall and the other 160 ft tall; both pre -manufactured equipment assemblies, field painted off-white color to match the city water tower off-white color "Cumulus". The 'Airgas' logo will be painted near the top, on two sides of the tallest tower. A C.U.P. is needed for these structure heights, critical to Airgas's operations. 4. Electrical Power Sub -station — provided and installed by the electrical utility company, with perimeter safety fence. Exact layout tbd by Xcel Energy. 5. Power Distribution Control Enclosure — a 600 sq ft x 15 ft tall pre -manufactured electrical equipment structure, white factory finished metal wall panels, adjacent to the Compressor Building. 6. Analyzer / Control Modem Enclosure — a 300 sq ft x 10 ft tall pre -manufactured equipment enclosure, factory finished in a neutral color. 7. Five (5) Gas Batching Tanks — each approx. 110 ft long x 12 ft diameter, on concrete saddle supports with tank tops approx. 24 ft above grade, painted white color. 8. Cooling Tower and Water Treatment Enclosure —The Water Treatment Enclosure is a 150 sq ft x loft high, neutral toned, premanufactured structure containing the water treatment chemicals for the adjacent Cooling Tower. The Cooling Tower is approx. 24 ft tall. 9. Truck Scale Control Enclosure — a 300 sq ft x 10 ft high, neutral toned, premanufactured structure containing electronic control equipment adjacent to the nearby truck scale. 10. Miscellaneous Process Piping, Tanks, Valves and Control Units — Connecting equipment to support the manufacturing and distribution processes, field painted various tones; some white and some specially colored to identify their product. The Case for Variance of Wall Materials: Both of our primary buildings (Compressor Bldg and Office / Vehicle Maintenance Bldg) are located behind exterior equipment, process piping and large tanks in the front and side yards, so the exterior wall materials are neither dominant, nor prominent, to surrounding views, especially from the public way. They are setback 350 ft from 100th St. S. frontage, and 125 ft from the gravel lane (Glendenning Rd. S.) Accordingly, it wouldn't be appropriate to create more "visual interest" on the facades; but rather, let those facades provide a uniform Neutral Background tone to the process equipment in the foreground. Our objective is to provide adequate perimeter screening of the ground equipment via strategic placement of perimeter landscaping and a perimeter solid fence. Our 3D renderings demonstrate that there are no significant views to the primary buildings from 100th St. S. Our proposal is to use prefinished metal siding (Class 4) wall materials on most of the walls to act as that Neutral Background. As recommended by your Planning Dept,; and out of respect for any future development on the east side of the adjacent pond; we have added simulated (EIFS) face brick wainscoting (Class 1 / 2 material) to the Office & Vehicle Maintenance Building's South and East facades. We have 21% of those facades treated accordingly. Attached to this narrative is product information about the simulated (EIFS) face brick system; including a picture of a local example used successfully along an urban public sidewalk. Signage: One ground -mounted sign is needed at the entry driveway, with the company name and address. Painted company name signs are proposed near to the top of the taller Distilling Tower; one sign on the north face and a second sign on the south face. Parking: The use of the facility does not fit squarely within any specific use category in the city's 'Required Off Street Parking' table 11-3-9, F. Airgas runs 3 shifts, 24/7. The weekday shift has the most employees, 15, including six employees on site in the Office / Maintenance Building, plus nine delivery drivers that only show up to park and take their truck on the route. The Compressor Equip. Bldg is normally unoccupied. All other shifts have fewer employees. We are proposing parking for 17 cars, which allows for two extra / visitor stalls in addition to the 15 employees. The site is gated for security, and is not open to the public. The delivery trucks make deliveries 24 / 7; only returning to reload and change drivers. So the site does not need to accommodate the entire truck fleet parking on site. Further, the truck route times are somewhat staggered so that doesn't cause overlapping shift -change double parking issues. Landscaping and Screening: We are providing a perimeter fence, 6 ft in height with 100% opacity, made from no -maintenance vinyl planks; light tan color. The fence, in combination with the plantings, will serve as a screen to the building and related process piping. Landscaping consists of hardy, climate appropriate shade trees and evergreens. The planting pallet is varied and contains a native and non-native mix of tree types that should perform well in the area indicated. As shown on the landscape plans, we are proposing planting additional evergreen trees beyond code requirement to further enhance the screen as a tradeoff for a portion of the code required shrub counts since the perimeter plantings are a more appropriate focus for this facility. Wetland: The City of Cottage Grove contracted Bolton & Menk, Inc. to perform wetland delineation for the water habitat that borders the east side of the project site. South Washington Watershed District (SWWD) considers this wetland to be a "protect" classification level requiring a 100 -foot average buffer. A field investigation by Bolton & Menk was performed on November 2"d, 2018 to stake the west boundary of the wetland for determining the extent of the required 100 -foot wetland buffer which is reflected in the site plans. Delineation approval is anticipated from SWWD in May 2019. No impervious surfaces from the proposed development are proposed within the buffer area and on-site stormwater management has been designed to meet the water quality requirements for site discharge to the wetland. Sanitary Sewer and Storm Water: The nearest available sanitary sewer is a 30" diameter public trunk line that runs along the east edge of the property. The facility proposes one 4" domestic sewer pipe to drain northeast and connect to the trunk line at the nearest existing manhole with an exterior drop connection which is the preference of City Engineering staff. Stormwater runoff from the roof drains and all developed impervious surface will be collected in two infiltration basins designed to meet requirements for runoff rate control, volume reduction, and water quality. The basins are proposed at the northeast and southeast corners of the site, respectively. Site Lighting: LED lights on poles and one LED wall pack light are proposed; refer the Site Lighting Plan. All fixtures are downward -cast style. We have contacted the local FAA office to inquire about safety lighting on top of the 160 ft tower. Their preliminary opinion is that no special lighting will be required, due to tower being less than 200 ft tall, and its proximity 5.5 miles away from Fleming Field in South Saint Paul. They did ask us to apply for a more formal review via their online "Obstruction Evaluation / Airport Airspace Analysis" (OE/AAA) process; however that FAA service wa temporarily closed due to the federal government shutdown. We will try to apply again soon. End of Narrative cwtopw Private Residence Chicago, IL "Custom Brick transformed this once -dour townhouse into a high-end luxury home with dazzling curb appeal' 1 t Brown Street Station Condominiums Forest Park, IL 'We wanted an antique brick look that \ you just couldn't get In this area without — paying a fortune and waiting forever to I get iL Custom Brick provided a perfect, M end accessible, solution' to Maddian Hotol Priwteaoildome Atlantic Station Columbus, OH Chicago, IL Atlanta. OA AFTER 2000 YEARS ... A BETTER BRICK! Manufacturing and transporting clay brick is energy intensive. On the j. bsile, It has to be combined (by several contractors) with substrate �.. protection and Insulation (supplied by others) and there is no "single-sourco" responsibility or warranty for the performance of the wall. A Dryvit Oulsulalion nm seroma system with Custom Brick finish provides an environmentally superior, simpler, lei WO,,'"' cost-effective alternative, from a single source. Now that's a bettor bricks Dryvit Custom Brick comes in a variety of standard "templates"–but we can also match an existing building or locally preferred pattern or brick size. Combine this design flexibility with an Infinite selection of colors, textures and shading techniques, your building exteriorcan look EXACTLY the way you want[ A full Custom Brick brochure can bo oblainod on our vminito at drivil.com c+ D-„ ,� n dam■■ .■...■ Usod Wall Brick Brooklyn Brick Utility Brick c+ D-„ ,� n \ il c+ D-„ ,� n Preliminary Site Development Plans IIIIIIRENCHMARKS BM NO. 1 "HARVIN" ELEV.-811.603 BM NO.2 for TNH @ NE QUAD OF 100TH ST. SO. & JAMAICA AVE. SO. ELEV. 806.01 Air Separation Unit (ASU)/Liquefaction Unit (LFU) Cottage Grove, Minnesota CONSULTANT CONTACT LIST: CIVIL ENGINEER SAMSATEK DEVELOPER/OWNER 12800 WHITEWATER DRIVE, SUITE 300 AIRG3S259 N. RADNOR-CHESTER ROAD, SUITE 100 MINNETONKA, MN 55343 RADNOR, PA 19087 TEL 763-476-6010 TEL 312-715-7283 FAX 763-476-8532 CONTACT'. GLENN SCHUMACHER CONTACT : PETE MOREAU ARCHITECT EDWARD FARR ARCHITECTS, INC. 7710 GOLDEN TRIANGLE DR EDEN PRAIRIE, MN 55344 TEL952-943-9660 CONTACT'. ED FARR GEOTECHNICAL GEOSYNTEC CONSULTANTS INC. 10777 WESTHEIMER RD., SUITE 900 HOUSTON, TX 77042 TEL 281-810-5061 CONTACT'. RUDOLFO SANCIO SURVEYOR SAM BATEK 12800 WHITEWATER DRIVE, SUITE 300 MINNETONKA, MN 55343 TEL 763-476-6010 FAX 763-476-8532 CONTACT : CRAIG JOHNSON LANDSCAPE ARCHITECT SAM BATEK 12800 WHITEWATER DRIVE, SUITE 300 MINNETONKA, MN 55343 TEL 763-476-6010 FAX 763-476-8532 CONTACT BILL DELANEY Presented by: Airgas, Inc. N.T.S. ry� �a SITE loornars 'ST VICINITY MAP NO SCALE GOVERNING SPECIFICATIONS CITY OF COTTAGE GROVE SPECIFICATIONS (2019) CITY ENGINEER'S ASSOCIATION OF MINNESOTA STANDARD SPECIFICATIONS (2013) MNDOT STANDARD SPECIFICATIONS FOR CONSTRUCTION (2016 EDITION) IIIIIIIIIIIIIII!SHEET INDEX SHEET DESCRIPTION CIVIL 11K, SITE PLAN C4 01 1 RA DI NI 11N C-2 GRAIANG SECTIONS Sambatek www.sambatek.com 12600I611b.W Oft Sub BOD 1W.W., NN WM m.I7aB0107depwe 7&9A2a969201CBbb Client Airgas an Air Liquide company Project ASU/LFU FACILITIES (PROJECT VIKING) Location COTTAGE GROVE, MN Certificationsy I rvEEn e'pq I (V 53735 0 D1/29/2019 Summary a: PE oe/Pa hsh Revision History IJ o.Date By 5ubmlttal/Revision 1/29/19 CITY SUBMITTAL TITLE SHEET Sheet No. Revision C1.01 Project No. 21604 VICINITY MAP i/ ll SITE n� TETE' I R9; �' �IS Ili I, �•n, I � ,„ 6pEorvE �� 1 A - ��----fn — m V111111A\1 010 =E J� II I \ wRiER SURFACE \ \ \ 1 \ \ \ \ \ EL-7— RD I LEV 7— RwN5�LR FER Y w.MYllOxwIS \\ ! r'� v v v �� obi'• ? 1 �\ \\�1 I el EA. 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Th-1ja„ P:oPaE, —.- �1,1",!nl�o°,,hno1 Th, -1,ld.„ IF IIIIIIIIIIIIIIIIIIRENCHMARKS n� 001`��1 oa'E—d NA1reeTh. -,I I,,b—, —h1111IN :erre cedfrm1he E�'!1ARVIN I mm .pE1ev,--8v.6R, c DE -d I 1111h 11 11 111,111, 11 11 Ell, =SURVEY NOTES �q Z, ! d i. �m o� so. o� ,m R m�s� v, u R11 -SI F1 1 T. Ell -I,.,,— TvEI/201 IS \ �) 1 V AIR IS\ \ (1 I f ! \ \ \ 1 \\ d IT A V A vv v�. V A \ V V \ \\ \ IS \ \\ IS \ 1 \\! fl 1 I I 1 IS \ ay, MSRA L �aE RRA.,,. \ .� — 1 \\ \1 \ I \\\\\1\\ \ \ \ I wwE \`W ppApdp, y{ — —---y-1 :, � �. t\ A1 1 4" 1 11\ r �6'5327 639.011 y y11 i .. I IgQli R a I,f )%T13r op\NI del � �' ' ''� (r)•A 'v� a� Sambatek www.sambatak.com 126W I611b.W Oft 5!b 20D W.W., NN 56913 7mA7a6o10bNpnb 789.178A6a2acNn2R Client Airgas® an Air Liquide company Project ASU/LFU FACILITIES (PROJECT VIKING) Location COTTAGE GROVE, MN Certification el JL O� I Summary o-sRaa,— oa:.„M:.: Appro� �a —1/R. Rea= 1-1T I,. - lase = E Revision History No. Date By Submittal/Revision 1/29/19 CITY SUBMITTAL JneeL i me EXISTING CONDITIONS Sheet No. Revision C2.01 Project No. 21604 v11v 1 V1 F \ \\ \I \\ 1\II g s To Pn.I1 \ o zsa \,\I\ IAIER SURFACE „\ \ IT. FRIL.— \'p �O AS, L k Ix. �x god vv�vk xowwEA, vEASTAII LIT V Nm I INI,A-Ew,ErEx 1 e� �� al ��L� �v v A\�v .iIDnv�v ` v`vv�v L \ \\ 1 \ --ss�rnANSN�Is u \ CATE - \ �l / .2.29 o d ------- \ - _, \ POlrl 1R ON uN6� ' d —LEGEND ---- a�oRE .E,Llx��lNa 0 Sambatek IFULLER EIICIENI -- - - -- - - - www.3am6atek.00m +.saAT IT""nA Ta�luc ��-ICLAIII 12800 whlwl-Orn sv800 I 1 ua I'N 55343 NI 1. L FINULDm w_TRI ]83.476.801] WITIRo 834788532 Fax'nile N LINE CS rL"N' TMI_RM ISSWM Pansy La�iraaanal 1111-11D I- `w Client Ie Lor eDEVELOPMENT SUMMARY Airgas EA ATwA=Anr. LAvsw I, 111 III 11�1 en �exaosnl of so x.nw.\ IFIE IED IRE xEa1 11111E 1IPkARF an Air Liquide company nE 4 NooTH Project FProject ASU/LFLI asEa aN a FACILITIES AFL (PROJECT TITSL VIKING) —DEVELOPMENT NOTES F ALL.1111 N11.111 SRI 1-1 L' 1. 111 Location I COTTAGE Nr< tr oF. a, Ee TOT roT GROVE, MN EITI 1EITaUNA ITIIINo ANENroN. Certification aLeuN AT I �Fu,F 11 NO 'A""' aLLI_ewIE ALL "I'"I oLseoavcrv- —KEY NOTES I eeHNCH --i Summary UNNIEDIRATERI—F SITE I r t .EFFIRSAITTI1E„ 1111S PE—T al Revision History I- By 5 b ttal / eevis on RUN SCAIR E NT,rr Axrsro arL:. LNrwas our 1111 11 - IIIIIIcrunnLILL as ry_ IIT 1/29/19 CIW SUI i_ GwOIER TIv . 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W Oft bb BOD W.W., NN SSM TISIM0107depw. 789.42a9692f.nb16 ftv-1.Iwryllp IYWgIEMemmY Client Airgas® an Air Liquide company F S Project ASU/LFU FACILITIES (PROJECT VIKING) Location COTTAGE GROVE, MN ❑o �Nae,.l� Certification E NEE1 ;, g(V53 35 N1/29/2— ....... / / ° NEI Summary / Revision History IR..Date By Submittal/Revision 1/29/19 CITY SUBMITTAL I KULK MANEUVERABILITY PLAN It ■S/h�eet No. Revision NORTH 03.02 ®° Project No. 21604 s7 11 1 m!m LEGEND PAOPosE o =--- - — - - — C Sambatek .. ..... ... kxom 12660 WhbMbr Oft sub 30D W.W., MN 65913 WXMIN"U" d••bNpnro b• Ato aClient —GRADING NOTES —INFILTRATION BASIN CONSTRUCTION NOTES AlFgas an Air Liquide company .... ... . ... .. ..... ... Project ASLI/LFLI 1�1 ILI 1A 11.11 1 `1 I IaL 11 — — — — — — — — —- FACILITIES LF 111 111 X'L VIKING N3�LL ZZ�L'�' Location 11A E COTTAGE ETI W 1a/29/2018 GROVE, MN A 1 7. 11 FFI-7 L L FF11V LL.1 LI�E 1ELTE1 0 I 1 °KI 1a, DI 1,E 1, IQ �A Certification 0 71.71 111111 ENIINEEI ,, z1 AI 7,. le A ... .... .. . P 'W" 53 z JL \E 47' 51'_ 21 ... . .... . ... ,ea bo 7Z7� �D „ 1 1'1511Summary T Ap-1/1 Revision History No Dale B, s,b—nI R,,I,i,n Ar 0. 1/29/19 CITY SUBMITTAL ZTrT I:„ LIT 1111 U I I'l I'E' '�Tl, I I I I L Sheet Title GRADING PLAN 11T U 37R,&-- SPP Sheet No. Revision T"_ E of N NORTH C4.01 ........... loo k\ na 1. FEETT Project No. 21604 NORTH �00 I,, FFIT 825 825 SECTION B -B -0+50.00 TO 6+50.00 ELEV. (Ffl 825 820 820 815 11 TEIIT 11— RI -E 820 815 815 810 810 805805 T I I I I I M 1 11IT 810 800 800 795 21 111—FIR-11-1E 810 805 A A II A III I I.T 11— IIIIE 795 790 805 800 795 790 785 1`1' 7.1N . ............. 785 780 7 80 775 aP 775 770 770 765 765 1 12 780 F SECTION A -A -0+50.00 TO 9+50.00 ELEV. (FT) 825 820 820 815 815 810 21 111—FIR-11-1E 810 805 A A II A III I I.T 11— IIIIE 805 800 795 800 795 790 oft 790 785 785 780 780 775 EXISTINCR I RAII 775 770 770 765 765 2 Sambatek 126W Whb.W Oft SM 30D W.W., MN MM MM"" MIMM Client Airgas an Air Liquide company Project ASU/LFU FACILITIES (PROJECT VIKING) Location COTTAGE GROVE, MN Certification I I REEL I gfGV53735 /29/2419 Summary okiPa Revision History 10.1)- 3V Submittal/Revision I/29/19 CII 6U6aITTRL GRADING SECTIONS Sheet No. Revision C4.02 Project No. 21604 V A A A' o �� ;� 24 AC i \V A 1 � �,rvoPE�aEA ,. Ea,a oQ �ti' EAE A<EFTE<.E. 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CONTRACTOR OR GENERAL CONTRACTOR TO COMPLETE TABLE WITH THEIR SPECIFIC PROJECT SCHEDULE Sambatek www.sambatak.com 126W NIIbmM Oft Sub aro W.W., NN 56913 W.46.6o16bNpnw 789A2a9592fwINaS Client Airgas® an Air Liquide company Project ASU/LFLI FACILITIES (PROJECT VIKING) Location COTTAGE GROVE, MN Certification E I I I I E E 1 a.°��.n.,e k653735 J2912ENP Summary / .,Ewe. -' ER„ E„ -P Revision History IN..[—By Submittal/Revision 1/29/19 CITY B-11ML EROSION CONTROL PHASE 1 Sheet No. Revision C5.01 Project No. 21604 =LEGENDPROPFRGEID EIIIFl.0 "AD. .......batakxom Sambatek 1E11 ER ... — ED RLDIR .. 126DD WhbMbr of SM 30D W.W., MN 56913—`1`1.1 ELES FE,1,1E —_—sr---sr— BOMM" I IMMM, IIYWgIEMmmY I I . FRI .1 LIPLI I FE 111E IC I 111 N 1111 Client 1=11o. 01 "k, "E'. 1. 11 Ul IIE 111. 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BOTTOM FLANGE OF /f3viNI°re TINisHm IR3o4 IL vni°va HIYDRANT TO BE CONCRETE PIPE BOLLARD NI5 ABOVE GROUND A 5' MINIMUM DISTANCE OF 2". 11 --- — — — — BACKFILL TO BE TAMPED 3' _ ,- COARSE FILTER AGGREGATE PER MNDOT SPEC 3199.2.H. COVER WITH MINIMUM MEGALUGS (TVP.)—� 9 MIL THIIXNESS 1 POLYETHYLENE. CONCRETE THRUST BLOCK IB"CONCRll BLOCK TIE ALLFITTINGS WITH MIN. OF —� ` PROVIDE CONDUCRNTY STRAP TWO, 3/9" DIAM. GALVANIZED Mr.). MINIMUM 1/16"X3/9" RODS & MEGALUGS WIDE FLAT COPPER STRIP. STANDARD DETAILS GOttage IIE'RU END Grove HYDRANT DETAIL WAT 1 COTTAGE GROVE, MINNESOTA zaIRIIIIT LRwRE I I / P J m.creETE 11 OSN PRECAST CONCRETE CURB mNcreErEslne laaaa asn^ s ao-sss ACNeEco-re oo-sE, ulNro°TT�Te T11 S IT I kraft°rT MaM TER 1-1 TLcvR. TrvT cl�lnr lune. Tl� a.�o roNouT 02 77 PAVEMENT SECTIONS T°" �T 06 T PnuT FLARED END SECTION nranou. s a.PER 'nEAuo °oEu•9,R° TIL°I°°IN°ten Nil 1.111 EAEE a"n L sin°reA°E (0)7,= LIGHT POLE BASE L B a/rv°uS E. AIII N1 /II 04 77 FLAT RIBBON CURB TETTI"T AT ET IN 111—EnI,TREEN°NEER 07 uT STORM SEWER MANHOLE Sambatek ....sambatakxom 126W rma. W onus SM aro W.W., NN WM M.4&6otabNpn. 78aA7&95a2fucNnb Client Airgas an Air Liquide company Project ASU/LFU FACILITIES (PROJECT VIKING) Location COTTAGE GROVE, MN Certification ...,E a.;�.n.,e m s. x.sl+Ny1�53T35 0 01/29/2819 Summary tlP^N ak/ Pee. hs„a Revision History IJ°.Da By Submittal/Revision Sheet Title DETAILS Sheet No. Revision C9.01 Project No. 21604 I P11111-1 I 'L olv/c1E".lnrTDDH —1 IIILIIILINIIIIIT m /f3viNI°re TINisHm IR3o4 IL vni°va CONCRETE PIPE BOLLARD NI5 a.PER 'nEAuo °oEu•9,R° TIL°I°°IN°ten Nil 1.111 EAEE a"n L sin°reA°E (0)7,= LIGHT POLE BASE L B a/rv°uS E. AIII N1 /II 04 77 FLAT RIBBON CURB TETTI"T AT ET IN 111—EnI,TREEN°NEER 07 uT STORM SEWER MANHOLE Sambatek ....sambatakxom 126W rma. W onus SM aro W.W., NN WM M.4&6otabNpn. 78aA7&95a2fucNnb Client Airgas an Air Liquide company Project ASU/LFU FACILITIES (PROJECT VIKING) Location COTTAGE GROVE, MN Certification ...,E a.;�.n.,e m s. x.sl+Ny1�53T35 0 01/29/2819 Summary tlP^N ak/ Pee. hs„a Revision History IJ°.Da By Submittal/Revision Sheet Title DETAILS Sheet No. Revision C9.01 Project No. 21604 —ING /seeSCHEDULE) ae°vesuNTE,w °T I.IL. 'p IUSTI.G R—S(I N6 EL -E -LE, ILL I L e1 TI E ei�cweex II T T 5�T`ITN �111 —11 Ll 12 TT NNE,,,T,,,,T I IIITILEIIIIIITISIE"ILI IUITIE 09 ST —11. IIST 777 7 27" DIAMETER CATCH BASIN (*7m SIGN POST EMBEDMENT ASSEMBLY =1 ------------- --------------- TI I T11 11 T11 1111 P 1E ILL I TI, TI, TI, TI, TI, TI, TI, T11T SECTION A A T11 1-1 — ITIL 1—TI—L �I N� 11-1 L�I-111 IUTLET IIIE F -n 17-11E 1111DE 11.1 2 1EET -I 4-7 7 OUTSIDE DROP MANHOLE -REINFORCED CONCRETE PIPE OR DIP FLEYIBLE PIPE 111LID11111—ITIL—I I—E—LE11E 111E—/I1 1-1— L 1111 IIIIIILLIIIIIIEITITIE =ENTE"-TERI`L III LL IE nll IEID III 11TE1 'L 'TI.L.. P_LTl 111 T -1— 1 I I—ITI L111-11-1 -TEIIIII-IIAL-1-1-1 _TERI _ IF RIE R._ (I T. III - —II I—IR LNEILIIEI�_111 I 1111IIID 1ITE 111 1111 1ITILL11 ELE-1.111, 111E IELD111I (4HTS 00 TRENCH AND BEDDING DETAILS Sambatek .......batakxom 126W ma. Of SM 30D N.W., MN WM MM"" MIMM Client Airgas an Air Liquide company Project ASU/LFL1 FACILITIES (PROJECT VIKING) Location COTTAGE GROVE, MN Certification!,,, I ILV53735 D1/29/29I I ........ Summary ....... .. "r ... I ... IIII I P.. Revision History N..D B, Submittal/Revision 1/29/19 CITY SUBMITTAL DETAILS 11 Sheet No. Revision C9.02 Project No. 21604 PLANT SCHEDULE —0 ° N Summary 111 ✓4f r a, N.A1'F 1 1 .aee...�se°°a ale°�vsienna ales ulaPle —e.ama a„ ueo nsha-v c, SUBMITTED LaND5G1PE PLaNMu9TFULFILL THE NIINIMUMFOLLOwIN6RE4UIRENIENTO: I/2B/IB CItt 111T BUBTAL A\\ PLANTNO u s BASE o BY COEITCENTI TOTAL SITE AREa RTREETVPEcoEFFCE VT I: l\' \� �� s i •/ I 11W1 I , i\ PREURVINAR Y3szU I •\ 1 ..PnTem............. 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IF reLa °,ai al 11 B, BE „NE-ROST/IFF— HILE .11 IF © B e ou E-11 4 Nam NAM v N ze M SI.T seed.. - l 111 d1 aea 11e1 I AII11e1 ¢w, Sambatek www.sambatek.com 126W r•w91 W Oft Sub BOD NMab■, NN 66913 M.46d01071Npn■ 789A2a9692f■■■ BOesiq I •I.nIB 1Y W q i EMgne.al Client Airgas® an Air Liquide company Project ASU/LFU FACILITIES (PROJECT VIKING) Location COTTAGE GROVE, MN CertificationO ene n�deNN.daLLN„mP; oreoa Wm o unde. wlr v .4ob2 :Bu"A tI DISTURBANCE OF BASIN AREAS) TO BE SEEDED FV TH ON STATE SEED Mx31-241 PER MN D, Summary 11j \AF AI 1 IHRUI 11 TIFFPANTNLIARFTDBFRRFATFD a, N.A1'F 1 1 COTTAGE GROVE LANDSCAPE CODE —e.ama a„ ueo nsha-v Revision History wo.Date By submInBl/aemsioR SUBMITTED LaND5G1PE PLaNMu9TFULFILL THE NIINIMUMFOLLOwIN6RE4UIRENIENTO: I/2B/IB CItt 111T BUBTAL A\\ PLANTNO u s BASE o BY COEITCENTI TOTAL SITE AREa RTREETVPEcoEFFCE VT I: l\' \� �� s i •/ I 11W1 I , i\ PREURVINAR Y3szU •\ FE .IRS IRIESTRUIS aoU39=L_.FLLsu RUR Sep \\ \\ \ I .IIP I\Ba I I `\ ` "t ALL PERIMETER AREAS OUTSIDE CURB TO BE-EEOED\VITH NATIVESEEOInIx Sheet Title ” REQUIRED PaNTIBGMATERIAL 61 nD RE goYINED 11 s IRA ER' LANDSCAPE cou FE ¢s.'aa ss oRNAN ENTt.L TREES B '^1s PLAN I 1 — i — 1\+;T �� •\\ TARGSH S 100 96 I MALESEH0.UBRUB1¢8 0 °RY °i zn \z \ 6REgUIFELL ENT TO BE MET BV PLANTING ADDITIONALI EVIOSREENSFOR zo.1 RATIOINLIEVOFSMALLSHRUBREQI0.EMENT FOUNBECATI, III )- .: ..I/ I EDESHRUe REaU I RE o BUTONOT vwueo=Tmq oIa oNAL EVFA EEN1 PN\VERITNEONOLEST PLO PERTIINEREIAUSEOFHEIGHT O UMTATIOry OVERHEAD ELEIRICAL Sheet No. Revision NORTH Project No. 21604 SCALE IN FEET DARKER TREES AT INITIAL INSTALLATION - OUTLINE AT 5-10 YEARS GROWTH r EDGE OF PAVEMENT 850 840 830 820 100TH STREET SOUTH I 90' RIGHT OF WAY PLANTING BUFFER W/5'BERM ELEV. 786 ELEV.VARIES (MEASURED FROM BOC) SECTION A—A (NORTH—SOUTH) OVERHEAD UTILITY 850 94o LEDGEENT 830 820 32' HGT. BID- BOB- 790- 780- TRUCK 10Boo790780 TRUCK LOADING STORAGE TANKS APPROX 784 APERON 784 GRAVEL ROAD —z TA NKSANDBUILDING ELEV. 7SS VARIES —� ELEV.784 0 6' PERIMETER FENCE (10' FROM POWERLINE) o a ORNAMENTAL/COLUMNAR TREES SECTION B—B (WEST—EAST) COLD BOX TOWERS COMPRESSOR BUILDING APPRO%784 EDGE OF PAVEMENT 6' PERIMETER FENCE NOTES Certification O BE " GENERAL NOTES FFHANI 1IRL-111THILLEM UMunn ALALrY REnurEMEurs E,<sT �e cO�OT nus REtar rve TO THE UATUREA�O .11 TO cEz IDA acv aennvpi uv vo into cn rHAvs Aeorc PnvE F" orTE n�ORu.CHILD 11-11 TI' suREAces. T TIEIAN IN N OF RAl ERCEOEPEsrs Arv>>scnsE T'av TIE 11 IT AOTPInuTEOU Otv OC DEtvEv sHAtt BE HCEtEDuwOvanTERE uuTt 111TRAIT11 SH4u MANE THE NECEssARt ARRANGEnnENTn EOR 1AT R. 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N.A. EAST PARKING Illuminance Fc 2.28 2.5 2.1 1.09 1.19 NORTH PARKING Illuminance ��•��'�" Fc 2.12 4.4 1.3 1.63 3.38 SOUTH PARKING I Illuminance Fc I 3.81 4.6 3.2 1.19 1.44 STORAGE LOT I IlluminanceFc 1 1.58 2.4 1.0 1.58 2.40 TRUCK SCALES I Illuminance IFc 1 2.10 2.8 1.6 1.31 1.75 TYPEAA, BB&CC2 TYPE DO GENERAL NOTES A. PULSE PRODUCTS DOES NOT ASSUME RESPONSIBILITY FOR THE INTERPRETATION OF THIS CALCULATION OR COMPLAINCETO THE LOCAL, STATE, ORFEDERAL U GHTNG CODES OR ORDINANCES. B. LIGHTING LAYOUT IS NOT INTENDED FOR CONSTRUCTION DOCUMENTS BUT ONLY TO ILLUSTRATE THE PERFORMANCE OF THE PRODUCT. C ALL READINGS/CALCULATIONS SHOM ARE SHOM ON OBJECTS/SURFACES. Plan View Scale 1 Inch=45 Ft Revisions t- 12 ow w mQ 12 U y CZ '^ G V W Z > Yw _ � CD W W < PAGE 1 OF 1 0 1 III ��•��'�" ISI �. �^�7CMESII • \'\ M' IIIc _ �IE!®i -_ , 'im 1 OWN I 1y■■ I II Plan View Scale 1 Inch=45 Ft Revisions t- 12 ow w mQ 12 U y CZ '^ G V W Z > Yw _ � CD W W < PAGE 1 OF 1 d � A a a / I , FLUUR PLANS SCALE'. 1l8"=1'-0" 8 cEUFEn Eu c,o sr 1 2 3 4 5 OFFIdE AREA TRUCK MAIIIrrENANCE ni_N Eta , / aiN t 0 _ r � �. ~ ooNFE�R—E 'o. .-- - _ "Tic— N I hereby,,q,f,etl that this plan, specification or report — prep—d by under y d,—t supervision e,d fhet I em e d,,y Licensed Architect .the laws s(th State of Mi—nness,J7 Edward A A. Farr sea. No 16362 P marl Manaaar -- z II — _ ` FteE ee�n�,.' COMPREWRBLDG _---_—-- I i i i r - EDWARD FARR ARCHITECTS INC Gteet Airgas. q mpany an Air Ll uitlec ASU/LFU FACILITIES 100TH STREET SOUTH COTTAGE GROVE, MN Gas( FLOOR PLANS ei7leiG(.DI11 Ih,,t ts.00t Al i; 10 9 I I ROOF RIDGE -------- ------------- �i vFINISHED FLR 8 I 7 6 I I F w � � I hereby,,q,f,,d that this plan, epee f-t- or report wee prepared by "di, y M-t supervision e,d 1het I — e d,,y Licenced Archliect ntler the laws (th State of Mt�neeore rr Edwaro A.Fa ,2vm,9 16362 Pmiaci AAanaaar l66 _p"— OF/ e. EXTERIOR \HALL �CLASS EXTERIOR WALL MATERIALS TLWALL PANEL MTL WALL PANEL CL�SIM FACE BRICK �1/2 / 1NORTH ITPEP,NTNOR BLDG; ELEV4TION / e 1ENST OPERATORBLIIELEVATION L 6CALE' IP"=1'-0"SGALE'.-0" o a e i5 T T T 10 T T I I I I I I yROOF ORIDGE 120 O_LA -GET _-_-_-_-_-11 6 f -IARCHITECTS 7--oEDWARD FINISHED FLR AAL FARR INC u 9k Giant �00'- 0 I I I I I I EXTERIOR WALL MATERIALS MTL WALL PANEL I CLASS 4 79% EXTERIOR WALL MATERIALS SIM FACE BRICK CLASS 1/2 21% MTL WALL PANEL CLASS 4 100 / +,6SCOULTHO1PI8"R-ATO'-0R" EEVATION O'RBLDGELEVATIO AE 1o a isJT 1-4 MATERIALS 1 STANDING SEAM ROOF oLo nov.. 2 DOWNSPOUT&GUTTER 3 MTL WALL PANEL (CLASS 4) 4 VISION GLASS 5 HOLLOW MTL DOOR & — FRAME —�o�co sox 6 CANOPY 7 BOLLARD 8 COILING OH DOOR 9 SIMULATED BRICK VENEER DRVVIT CUSTOM BRICK orEnr.run eLo� (CLASS 1/2) 6nT�nm�, Tanks10 REMOVABLE ROOF HATCH �suunu, r.E=E1T17 E i.IILE1 11 MTLLOUVER r=Hu �sureF eu, 12 NOTUSED Ili, Will,-- ". " -"' ". ": _ - -" 13 ROLE CATV/ALK r f._. .':, ■ 0,�. .. ;: "1 SCALE r= ,SITESEC1 -3o' -o'. Airgas an Al, Liquid. company ASU/LFU FACILITIES t ��ar�� 100TH STREET SOUTH COTTAGE GROVE, VIN taaian Fay la.(E Rr nrta OPERATOR BLDG ELEVATIONS 19.001 A2 l D f l 4 f 7 Y I V �O�OF RIDGE_ F _ EAVE HT I_ _ -_ _I I I HNISHED FLR l 3 f 7 I _ � I I l L f 7 I I l I f 7 � _ - I I /�^\ l K f l lR f L 7 7 I I 1 m ILE] Imil /�^\ l t f 7 ® /�^\ l 1. f 7 a ME ��^\ /�^\ l C f l H f 7 7 I CI I hatabycartiliatl that thisplan, meal tth ei— fthc StG preperetl by y paN— and mat t am a bayL,.,.b A�ohttaot �nba S't' tawa arm smm or Elnna SOtB A. Farr odwar�d M.. nag N" 16362 Pin art AAananai p.. looI EXTERIOR EQUIPMENT AND EXTE IOR EQUIPMENT AND LLowEa PIPING IN THE FOREGROUND PIPING IN THE FOREGROUND M NOT SHOWN FOR CLARITV EXTERIOR WALL MATERIALS NOT SHOWN FOR CLARITV EXTERIOR WALL MATERIALS r.� MTL WALL PANEL CLASS 4 100 % MTL WALL PANEL CLASS 4 160 % I \ NORTH COIIIP RESSOR BLGG ELEVATION I e \ EASTCOMPR ESSOR BLOC ELEVATION r.f SCALE' 1l8"=1'-0" 0 4 0 4 e t5 T T y T I 13 3 T/ ROOF RIDGE _ _ _ — 132 C7 8VE0"T I I I I FLR EDWARD FARR CHITECTS INC Chani SNS LED !l EXTERI N THE FOREGROUND EXTERIOR WALL MATERIALS PIPING IN THE FOREGROUND EXTERIOR ALL MATERIALS PIPING, R EQUIP ENTAND EXTERIOR EQUIP ENTAND I�I CLASS 4 ion% NOT SHOWN FOR CLARITY MNOT SHOWN FOR CLARITY _TL WALL PANEL CLASS 100% � MTL WALLP / �s' \ SOUTH COMPRESSOR BLDG ELE-TION EMEn 4 1NESTMAPRESSOP. BLDG ELEVATION SCALE: 1IB"=1'-0" 0 4 e is SCALE' 1IB"=1'-0" 0 4 e 1 MATPCIALS 1 STANDING SEAM ROOF 2 DOWNSPOUT & GUTTER 3 MTLWALL PANEL(CLASS 4) INTERIOR FACE 4 VISION GLASS 5 HOLLO\N MTL DOOR & FRAME 6 CANOPY 7BOLLARD 8 COILING OH DOOR 9 SIMULATED BRICK VENEER D RYVITCUSTOM BRICK EXTERIOR FACE (CLASS 1/2) 10 REMOVABLE ROOFHATCH �s1 ME AL NwLL PkNEL P W N 11 IATL LOUV ER sc�LE: a'=,-0• 12 NOTUSED 13 ROOF CATWALK Airgas. an Air Liquid. company, P'Maar ASU/LFU FACILITIES r"a"ti"" 100TH STREET SOUTH COTTAGE GROVE, MN laai an Fns ".iE COMPERSSOR ROOM ELEVATIONS SheeLdum7E� 19.001 A3 FOREGROUND TREES REMOVED FOR CLARITY VIEW FROM 100TH STREET LOOKING NORTHWEST EXTERIOR PIPING CONNECTIONS NOT SHOWN FOR CLARITY - VIEW FROM GLENDENNING & 100TH STREET SOUTH ENTRY DRIVEWAY EXTERIOR PIPING CONNECTIONS NOT SHOWN FOR CLARITY - - VIEW FROM JAMAICA AVENUE EXTERIOR PIPING CONNECTIONS NOT SHOWN FOR CLARITY rr _ y AERIAL LOOKING NORTHEAST EXTERIOR PIPING CONNECTIONS NOT SHOWN FOR CLARITY - - I harebycartifiatl that this plan, specification or report was prep—d by undar y d,—t supervision e,d fhet I— a d,,y Licansad Ar,Ni ct undarthai- sftha State of Minnesota m t Edward A. Farr U' sea. No 16362 Pr_'t MAnAaar EAF EDWARD FARR ARCHITECTS INC Airgas. an Air Llquitle company P�� ASU/LFU FACILITIES t� 100TH STREET SOUTH COTTAGE GROVE, MN PERSPECTIVE VIEWS 19.001 A4 TOWER$ BEYOND� VIEW 1 - FROM BELOW KEATS AVENUE BRIDGE (0.9 MILES AWAY) TOWERS BEYOND VIEW 3 - FROM FIRST ROW OF TREES (2/3 MILE AWAY) TOWERS - BEYOND w VIEW 4- FROM MENARDS (1/2 MILE AWAY) TOWERS BEYOND VIEW 2 - FROM MIDDLE ROW OF TREES (0.8 MILES AWAY) 1 ,VIEW 4 1. -7 ♦ _ - VIEW 3 IS MSL VIEW Z - p 8 MIL J os MILE EW 1 N VIEW MAP I harebycartif,,d that this plan, specification or report was prep—d by under y d,—t supervision e,d fhet I — e d,,y L,.,.d Architect ,dtla the laws of the State of Minnesota ,J7 Edward A. Farr L✓ vt- aea. No 16362 P marl Mfla F!]fl IAF EDWARD FARR ARCHITECTS INC ch"t Airgas. Airgas Pr�iari ASU/LFU FACILITIES I o�Aro� 100TH STREET SOUTH COTTAGE GROVE, MN ,�,�, ed� "te STREET VIEWS FROM HIWAY 61 19.001 A5 LAKE FLORA PRELIMINARY PLAT ®° 1,= ", IT ER �G <a°PArvy �'-� — — — — —' —----- L, _77 T ------ --- %---------- ------ J o—D Em ,y ii- — 46 1-2 / '✓'�o/ ',`�i/F� %/�j,o/rze/2owis3. / �, A�LFry 1V✓ OUTLOTB ,o/zz/zo,e 'I -Y, I ,/ 1 fr'LAKE FLORA ACIII SSct FT " T"IO _ '. 5 / :�' 111 ,� 12092 �.�� xAKE FLORA' 0/1�1i4IS3 Fk TO IrLlb o s /I -- _--_ --_ - - -'rte>��= T=�> --_-- - _- ��->--- -- -------��--��' OF o y„ // \ 1 '' /- l ) _ ( ¢ i 0ESIT / EII 111. 'LOT l / �. BLOC'1 ,1 r' K t 1rr>teyF`r, o�E C1^2 I - - oum°A EDrnAncx s..° i tae zs� �I 11 1-1111E I'll EICT ✓a+' nT ao ;; n- IT TEI 11 "Ill oz)L a,Eta - cLE oEw c_Rono SOUTH I- — _ = --- — - - - - - - - tt -< J. \ ". _- —� \G,, -_ - -- "�--- NO "' " i a FT a AREA TABULATION DESCRIPTION SURVEYOR'S NOTES hingmn, en h,hSoh LET1 3]300]34. FT. 8.563 ACRES retaken fmm the s[ale of., nnesot g solution elevation data FTP ste The data for the mntours was mllectetl tF ough flight paths taken LOT e02z1FT. 0.185 ACRE3a,dordNg to the plat thereof a, redorded look I of bal, page I N the offhe of the Reg,ler of leed, for a,d tl y 11/la/20 4 h—re vaale y order of Dirtnctcourc, Exst Judioal Dirtnct, washingtoh Do y, ,hhesota dated Marts s, 1882. 4.Elerationsarem[er., of MnDOTmonumen[ xARVIN, eleraeon=811. —ft . DUTLOTA 1372407 SO. FT. 31.506 ACRES (Kb,talIropercy)h SURVEY RS CERTIFICATION OunOi1 120928 S4. FT. zIld ACREShe at III, su y p p y or untle y e p :ion dna that lama y ensed lana su y under I'd laws of the state of RIGHT oFv_nr za3Os sa ET. C 55 ACRES UTILITY AND SITE DATA Menne:ota. TDTALAREA 1998721SO. FT. 43.589 ACRES zowlva—jeNt property D(Heavy lndusthal Dlsthct) Date of I ap lebNary 7 2111 elo 41- 11 "1 nwlrervmED OWNERS/SUBDIVIDERS uaen:e lvo. alela MorvaervT fourvD elIumlrvous epee wfte Farm:, Ina.,a Minnesota Corpoanon. ]vote. Th, : cercnladon :made to the parcl e, a:ted above a, a prole-onal oplmon ba ed on the knowledge Information dna beua of the —veyo r a: of the date of p orvafrvT fourvD a -e —veyetl that E ncnourvD SURVEYOR/ENGINEER/DESIGNER p teadne documentanon and:u y Ll be q dmaonnrm cohd,Loh,affe g l pro p v er date of::uance ofmi::u y X 'ILE 1-1 Ed' oe X "Ap Doty Msslos s1a¢ VEL Ease Ma lew lv » IT". SEwEn -- — — --- — IDTEnmE°IATE mDT111 PRELIMINA RV PLOT IT "TIE -IT 11 TIE NAI 'ALI sem°ry RIA Irvo¢tmrv.°ua oTTAOE GR -E, m -na ory ¢uAarea urvE wETwrvO EDeE ® wAtxlry°TarvIInrvTy,MlrvrvEtaTA BOLTON _ & M E N K MA" n E,4 , Gly ofcoTTAaE1111E 2111, �s PR4vaznn°Est°u AM ,onrvuMnER .4-11s "Ell I'll —ny. All BOLTON M & MENK Real People. Real Solutions. MEMORANDUM Date: 02/15/19 To: Ryan Burfeind, PE From: Mike Boex, PE Subject: Airgas Site - Preliminary Plan Review City of Cottage Grove, MN Project No.: N14.118245 2035 County Road D East Maplewood, MN 55109-5314 Ph: (651) 704-9970 Fax: (651) 704-9971 Bolton-Menk.com This memo summarizes the review of grading, site development, and utility documents submitted by Sambatek, dated 01/29/19. Sheet C1.01: 1. Consider referencing the 2018 edition of the MnDOT standard specifications for construction, as that edition is referenced within the City standard specification. Sheet 3.01: 2. Due to the detail on sheet C9.01 as well as key note M, we assume a ribbon curb is proposed around the perimeter of the pavement. However, key note M is not labeled anywhere in plan view. 3. There appears to be no interior ribbon curb adjacent to paved areas. Ribbon curb is recommended for edge protection in areas where vehicles may depart paved areas onto the aggregate surfacing. 4. We assume key note J represents the bollard detail on sheet C9.01. 5. Clarify/label the type of perimeter fence proposed. 6. There are existing overhead power lines that run north -south along the east side of the current access road (old Glendening Road South) shown on C2.01. The lines are also shown on sheet C3.01 within the fenced property. However, these overheads lines do not appear on the perspective view from 100th on Sheet A4. At this time we assume they will remain in place and are not to be relocated underground. There also appears to be an aerial cable line attached to the power poles. It is our understanding that these utilities have a prescriptive easement. 7. The area identified as a Lay Down & Construction Parking Lot on the north side of the site is mostly north of the proposed Airgas property. This will require a temporary easement with the property owner to the north. 8. Provide a stop sign at 100th Street. 9. Identify proposed traffic control measures on 100th Street as work is depicted right up to the travel lane. H:\C0TT\N14118245\1_Corres\C_To Others\115136 Construction Plan Review 2019-02-15.docx Bolton & Menk is an equal opportunity employer. Airgas Site Preliminary Plan Review Page: 2 Sheet C3.02: 10. Truck turns from 100th Street exceed the proposed driveway radii, 20' radii will not be sufficient. 11. Complete the turn onto 100th Street without crossing centerline on 100th to demonstrate the radius on the west side. Sheet C4.01 12. Label EOF's for the basins and other applicable overland routes on the plan. 13. Label basin NWLs and HWLs. 14. The ultimate HWL for Lake Flora (L -P3) could be as high as 775.0. Please evaluate options to raise the bottom of the north basin at or above the 775 contour. This may require the need for storm sewer pipe and catch basins in lieu of the overland ditch on the east side of the property. 15. Clarify where is Inlet Protection Device (IP -4) identified on sheet C5.04 going to be used. 16. More detail is needed to determine the existing and proposed drainage at the proposed entrance road and existing access road. It appears that there is an existing culvert under the existing access road that is to remain and drainage is currently proposed to run over the new driveway. Shppt c,; n?. 17. Depict measures to protect Lake Flora during installation of the storm sewer down near the lake. As depicted, the pipe extends beyond the perimeter silt fence. Sheet C6.01: 18. Extend the proposed FES to the water elevation of Lake Flora. 19. The city fire marshal has reviewed and approved the location of onsite hydrants. 20. The proposed 4" sanitary sewer service pipe should not connect to existing trunk sanitary sewer manhole as depicted, it goes against flow. The 4" service pipe should be installed directly east from MH -01 and connect directly to the existing trunk line. This connection should be constructed using the Inserta Tee Fatboy detail attached to this memo. Due to this change, MH - 01 could also be relocated further south if desired. a. Cleanouts are needed if the service length exceeds 100 feet (City detail SER -10). 21. The plan view identifies RCP storm sewer pipe with the exception of two segments at the south west corner of the site being PVC. The utility construction notes on the sheet state all storm pipe shall be HDPE. Change all labels and references to utilize RCP storm pipe except where different materials are required by the Department of Labor and Industry (at water crossings). 22. Provide a profile and detailed elevations of the proposed storm sewer pond outlet pipe crossing the existing trunk sewer at the northeast and southeast corners of the site. Shpptt C9_n1 23. Use city standard detail plates whenever applicable (sanitary and storm manholes, gate valves, flared ends, rip rap etc.). A complete set of details can be found on the City's website: https://www.cottagegrovemn.gov/departments/engineering/standard detail plates.php Bolton & Menk is an equal opportunity employer. Airgas Site Preliminary Plan Review Page: 3 Shppts cc) n?. 24. Delete the outside drop detail and instead used the Inserta Tee detail attached to this memo. Stormwater Comments 25. A stormwater maintenance agreement shall be required for all basins and the pipe outside of the subject property to Lake Flora. The City will follow up with an agreement form. 26. Rational Storm Sewer Design: On-site storm sewer should be sized to a 5 -year rational method design. Submit rational method design calculations for the storm sewer system. Please submit a drainage area map for each catchment. Include individual pipe segment velocities with calculations for review. Trunk facilities should be analyzed and designed to accommodate the 100 -year ponded discharges plus 5 -year rational flows from areas that enter the trunk to be carried to the next storage area downstream. 27. For stormwater facilities with emergency overflows, the low entry elevation for all new structures must be a minimum of 3 feet above both the peak surface water elevation for the 100 -year precipitation event and 2 feet above the emergency overflow elevation of any immediately adjacent new stormwater basin. The stormwater management plan indicates that the emergency overflow elevations for the north and south basin are 777.25 and 780.25, respectively. The proposed buildings have finished floor elevations of 784.5 feet as shown on Sheet C4-01. The highwater levels for the infiltration basins are 775.42 and 779.6, for the north and south basin respectively. The NWL and EOF elevations should be shown on the plan sheets. The proposed basin HWL and EOF design elevations within the stormwater report comply with the freeboard requirements. 28. The South Infiltration Basin (Pond 3P) is modeled in HydroCAD with exfiltration at 0.45 inches per hour. The pretreatment forebay is 3 feet deeper than the infiltration basin, with the invert of the pretreatment cell at elevation 774. There is a problem related to the bottom elevation of the pretreatment basin: 1) 48 hour drawdown rules limit the depth that an infiltration basin can be (1.8 feet for infiltration rate of 0.45 inches per hour). The HydroCAD model should be revised to only allow exfiltration within the infiltration basin and not within the pretreatment forebay. 29. Soil Borings: Soil borings and a geotechnical report have been provided. The report indicates that except for Boring B-01, all other borings encountered limestone at depths from 3 feet to 15 feet. Boring B-01 is located near the proposed north infiltration basin (Pond 2P). The basin design bottom elevation is 773. Groundwater was encountered at elevation 764-9 feet below the planned basin bottom. Silt soils are found near the surface overlying well graded sands. If a silt layer is encountered during construction it should either be removed or a lower infiltration rate should be assumed. Boring B-06 is located near the proposed south infiltration basin (Pond 3P). The basin design bottom elevation is 777. Limestone bedrock was encountered at elevation 774.1-2.9 feet below the planned basin bottom. Please note that at least 3 feet of separation to bedrock must be provided so should the encountered rock elevations vary, rock excavation may be needed when constructing the basins. 30. The geotechnical report states: "The underlying limestone and relatively close proximity to mapped karst features could lend itself to karst-induced subsidence. Therefore, this potential Bolton & Menk is an equal opportunity employer Airgas Site Preliminary Plan Review Page: 4 hazard should be further investigated."' The applicant should demonstrate how this potential condition has been investigated and the suitability of the proposed infiltration areas onsite. In addition, the South Washington Watershed District Rule 8 includes standards that are applicable to projects on sites with known karst features. The South Washington Watershed District interactive map viewer (http://map.swwdmn.org/) includes "Known Karst Features" and "Bedrock Faults" layers under the Land mapping layer. The District advises that remediation procedures should be in place to address karst features if they develop on site. Please refer to the Watershed District for the full text of the rule. 31. The City requires a uniform volume control treatment equal to 1" of runoff from the net increase in impervious areas. The SWPPP indicates an area of disturbance of 8.3 acres and impervious areas of 0.25 acres existing and 3.76 acres proposed. Therefore, a Net Increase in impervious surfaces of 3.51 acres is proposed. The HydroCAD models indicate existing and proposed impervious areas of 0.23 and 3.93 acres, and a net increase in impervious area of 3.70 acres. Please resolve the impervious area discrepancies between the stormwater management plan, the SWPPP and the HydroCAD model. " Final Geotechnical Report, for Midwest Air Separation Unit, Cottage Grove, Minnesota prepared by Geosyntec consultants, Houston, Texas, 77042, 11 January 2019 Bolton & Menk is an equal opportunity employer. INSTALLATION DETAIL FOR TAPPING LINED RIGID PIPE USING INSERTA TEE FATBOY® CONCRETE ENCASE CUT AWAY SECTION WHERE REQUIRED BY LINER MANUFACTURER DETERIORATED RIGID PIPE PIPE LINER A RUBBER SLEEVE CONCRETE ENCASE INSERTA TEE FATBOY CUT AWAY SECTION HUB ADAPTER FOR 4" AND 6" SDR 26, WHERE REQUIRED 28, AND 35 LATERALS BY LINER MANUFACTURER a a ,• a a 41. ) aQ a r a s PIPE I INSTALLATION INSTRUCTIONS: 1. MARK AREA TO BE TAPPED ON SURFACE OF RIGID PIPE. WORKING AREA SHOULD BE 2 -INCHES WIDER THAN DIAMETER OF INSERTA TEE. 2. BREAK AWAY RIGID PIPE SECTION TO BE TAPPED AND EXPOSE NEW LINER SECTION. 3. BRUSH AND CLEAN PIPE LINER SURFACE AND REMOVE DAMAGED SECTIONS OF RIGID PIPE. 4. CORE HOLE INTO LINER WITH APPROPRIATE INSERTA TEE HOLE SAW. 5. INSTALL INSERTA TEE FATBOY® TAP CONNECTION PER PROVIDED INSTALLATION INSTRUCTIONS. 6. ENCASE CUT OUT SECTION OF RIGID PIPE WITH CONCRETE WHERE REQUIRED BY LINING MANUFACTURER. DETERIORATED RIGID PIPE ©2010 1REV. DESCRIPTION BY I MM/DD/YY I CHK'D ADVANCED DRAINAGE SYSTEMS, INC. ("ADS") HAS PREPARED THIS DETAIL BASED ON INFORMATION PROVIDED TO ADS. THIS AWM DRAWING IS INTENDED TO DEPICT THE COMPONENTS AS REQUESTED. ADS HAS NOT PERFORMED ANY ENGINEERING OR DESIGN PH, 503/357-2110 SERVICES FOR THIS PROJECT, NOR HAS ADS INDEPENDENTLY VERIFIED THE INFORMATION SUPPLIED. THE INSTALLATION DETAILS TAPPING LINED RIGID PIPE FX 503/359-5417 PROVIDED HEREIN ARE GENERAL RECOMMENDATIONS AND ARE NOT SPECIFIC FOR THIS PROJECT. THE DESIGN ENGINEER SHALL I WITH INSERTA TEE low, 0 ". REVIEW THESE DETAILS PRIOR TO CONSTRUCTION. IT IS THE DESIGN ENGINEERS RESPONSIBILITY TO ENSURE THE DETAILS PROVIDED HEREIN MEETS OR EXCEEDS THE APPLICABLE NATIONAL, STATE, OR LOCAL REQUIREMENTS AND TO ENSURE THAT THE NTS DETAILS PROVIDED HEREIN ARE ACCEPTABLE FOR THIS PROJECT. DRAWING NUMBER Enaili soles@insertatee.coro OF