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Home My WebLink About2007-09-04 P & Z Handout " Rice Creek Watershed District Permit Application Status Updat RECEIVED AUG 27 2007 Permit Application Number: 07 -083 Date of Board Action: August 22,2007 Current Status: CENTERVILLE, MN Conditional8pproval Pending Receipt Of Changes (CAPROC) Please note the following: · You are not authorized to begin site work until all pending items are satisfied as enumerated in the attached Engineer's Report. If project is initiated without obtaining an RCWD Permit, the project will be stopped by the District Inspector until the permit is obtained. . You have 12 months from the date of Board action to submit/satisfy all pending items and receive a permit. Otherwise the conditional approval expires and a new application will need to be submitted and considered by the Board. RCWD staff is not authorized to grant extensions. · To satisfy pending items, applicants may submit electronic files (.pdf or .jpg format) to permits@ricecreek.org or 2 paper copies of all submittal items to the District with the exception of plan sheets. Plan sheets must include 2 full-sized copies, and 1 reduced size (11 by 17 inches or smaller) or an electronic file. · Surety - for surety amounts of $5000 or less, the applicant must submit a check made out to the RCWD. For surety amounts over $5000, the applicant must provide the first $5000 in the form of a check and has the option of providing the remainder of the surety amount in the form of a Letter of Credit (see website for template). . Easements - if an easement is required per your list of pending items in the attached Engineer's Report, then the legal descriptions of these easements must be prepared by the applicant, reviewed and approved by the District, and then submitted to the County Recorder's Office for recording. An easement template is on the website. . Wetland Conservation Act Forms - For projects involving wetland impacts and replacement, State law requires the preparation and recording of Wetland Legal Forms for replacement wetlands. Instructions for completing and recording these forms are included in the wetland legal forms document on the website. The wetland legal documents require the applicant to prepare legal descriptions of all replacement wetlands. These legal descriptions and the forms must be reviewed and approved by the District prior to submittal to the County Recorder's Office for recording. . Stormwater Operation & Maintenance - For projects involving stormwater ponds and infiltration features, applicants must complete and record a Stormwater Operation and Maintenance Agreement (see website for template) for these features unless a City assumes the maintenance responsibilities of these features as indicated in a letter to the District. An exhibit and/or legal description that clearly delineates and identifies all stormwater and infiltration features must accompany the stormwater operation and maintenance agreement. A draft of this agreement with accompanying exhibit must be submitted to the District for review and approval prior to submission to the County Recorder's office. cc: RCWD File # 07-083 City of Centerville Rice Creek Watershed District Permit Application Number Applicant: Purpose: Location: T-R-S: 07-083 Greg Watson ARC Builders 5630 Memorial Avenue N Suite 1 Oak Park Heights, MN 55082 Ph: 651-439-2213 Fx: 651-439-2311 greg@arc-builders.com ,Consultant: Mark Kretschmer Passe Engineering, Inc. 1611 County Highway 10 NE Spring Lake Park, MN 55432 Ph: 763-780-4100 Fx: 763-780-5200 Final Site Drainage Plan and Wetland Alteration Plan for a daycare facility, 5,000:1: SF, 1.83:1: acres. South of Center Street and west of 20th Avenue S, Centerville. 31-22-23 dad District Rule: C, D, E & F Recommendation: Conditional approval pending receipt of changes and outstanding items related to: Stormwater Management 1. Revised Grading Plan identifying the eXIstmg FES located southeast of the onsite wetland serving as the outlet to the storm water pond located 1,000:1: LF west of this site AND revising the invert elevations of the proposed culvert at the south end of the site to be 898.7 to maintain drainage from the offsite pond. Floodplain 2. Revised Grading Plan eliminating grading from the drainage and utility easement along the southern property boundary (see Finding 4 for further discussion). 3. Revised existing and proposed floodplain' quantification demonstrating compliance with District 1: 1 replacement requirements (if necessary per Pending Item 2). 4. Revised SWPPP specifying native deep-rooted vegetation for the proposed floodplain compensatory storage areas. Emmons & Olivier Resources, Inc. 8/23/07 Permit Application No. 07-083 ARC Builders Administrati ve 5. Draft legal document with satisfactory form and description granting ponding and flowage easements over all onsite ponds, wetlands, and other hydrologic features. 6. Draft Declaration for Maintenance of Stormwater Management Facilities acceptable to District engineer and attorney for proposed onsite storm water management features. 7. Copy of receipt from County Recorder and signed/notarized legal document(s). Note that legal document(s) are to be submitted by Applicant to County for recording only after approval by District. 8. Copy of MPCA NPDES permit application. 9. Surety in the amount of$5,000. Stipulations: I. An as-built survey of all stormwater management BMPs (ponds, rain gardens, trenches, swales, etc.) is to be submitted to the District for verification of compliance with the approved plans before return of the surety. Exhibits: 1. Permit Application dated August I, 2007, received August 2, 2007. 2. Hydrologic Calculations withsubwatershed boundary maps prepared by Passe Engineering, Inc., dated August 2,2007, received August 2, 2007. 3. Infiltration Worksheet prepared by Passe Engineering, Inc., undated, received August 2, 2007. 4. Floodplain Fill and Compensatory Storage Calculations prepared by Passe Engineering, Inc., undated, received August 13,2007. 5. Geotechnical Soil Borings prepared by Braun Intertec Corporation, dated July 27,2007, received August 2,2007. 6. Wetland Delineation Report prepared by Miller Environmental, Inc., dated July 24, 2006, received August 2, 2007. 7. Existing Conditions Plan prepared by Passe Engineering, Inc., dated August 2, 2007, received August 2,2007. Emmons & Olivier Resources, Inc. 2 8/23/07 Permit Application No. 07-083 ARC Builders 8. Grading Plan prepared by Passe Engineering, Inc., last revised August 10,2007, received August 13,2007. 9. SWPPP (2 sheets) prepared by Passe Engineering, Inc., dated August i, 2007, received August 2, 2007. 10. (Unsigned) copy of MPCA NPDES permit application, undated, received'August 2,2007. 11. WCA Notice of Decision for wetland delineation approval, dated August 3, 2007. 12. WCA Notice of Wetland Exemption/No-Loss Application, dated August 3, 2007. Findings: 1. The proposed project entails a 5,000:1:: SF daycare facility on 1.83:1:: 'acres. This site is tributary to Anoka County Ditch (ACD) 47. 2. Under existing conditions, runoff sheet flows to the onsite wetlands prior to discharge to ACD 47. Since less than an acre of total impervious is proposed, District rate control and water quality treatment requirements may be waived if infiltration practices are incorporated to the maximum extent possible. The proposed stormwater management plan routes parking lot runoff to a biofiltration basin at the eastern site boundary and roof runoff to a small infiltration basin / water quality basin in the northwest site corner. The submitted geotechnical soil borings indicate onsite soils are not conducive to infiltration; therefore, biofiltration in lieu of infiltration is acceptable. The water table is expected to be approximately 895.5:1::, which provides the minimum of 3-foot separation between the bottom of the basins and the water table. However, the northwest basin is directly adjacent to the onsite wetland and is set too low in the landscape to allow for an underdrain. Therefore, this feature will exhibit more of a wet meadow-wetland treatment area. Both basins are sized in accordance with District infiltration requirements and satisfy District requirements. EOR surveyed the ACD 47 ditch system and surrounding tributaries as part of the Lino Lakes Resource Management Plan effort. A 12- inch stormsewer pipe was identified as part of this survey which serves as the outlet for the pond located afproximately 1,000 feet west of this site within the Center Oaks 2" Addition SFRD. This storms ewer pipe is located within the existing 10-foot offset drainage and utility easement along the southern site boundary and its outfall Emmons & Olivier Resources, Inc. 3 8/23/07 Permit Application No. 07-083 ARC Builders is approximately 200 LF west of the intersection of 20th Ave. and the driveway south of this site. The survey identified this FES to be 898.65. Therefore, a revised grading plan is required identifying the existing FES southeast of the large onsite wetland. Additionally, the inverts for the culvert proposed at the south end of the site below the parking lot must be lowered to be no higher than 898.7 to maintain drainage from the existing FES as well as overflow from the wetland. 3. The submitted wetland delineation report identifies two Type 2 wetlands onsite. The District Wetland Specialist has reviewed and approved the delineated wetland boundaries. This project proposes 1,831 SF of Type 2 wetland onsite which is eligible for the WCA deminimis exemption of 2,500~ SF. The WCA comment period has expired and all TEP comments have been addressed. District staff recommends approval of the wetland exemption based on evaluation of the application in light of applicable WCA rules. 4. The RCWD regulatory 100-year flood elevation for this site is 904.0 (ACD 47, 1998 RCWD Calibration Study). Floodplain fill is proposed. The Applicant submitted a floodplain volume cut/fill analysis for existing and proposed conditions, indicating that sufficient compensatory storage is provided to satisfy the District's 1: 1 replacement criteria. However, grading for floodplain compensatory storage extends into the existing drainage and utility easement along the southern property boundary and it appears that this would potentially remove the necessary cover on the existing stormsewer pipe. Therefore, a revised grading plan is required eliminating grading from within the existing drainage and utility easement. Revised existing and proposed floodplain quantification is required demonstrating compliance with District 1: 1 replacement requirements as necessary per the required grading plan revisions. The grading plan specifies a proposed lowest floor elevation of 907.0, which satisfies District freeboard requirements over the regional 100-year flood elevation and the proposed infiltration basin HWLs and EOFs. 5. An acceptable erosion and sediment control plan has been submitted including silt fence downslope of disturbed areas, a rock construction entrance, riprap at stormsewer outfalls, revegetation specifications and an implementation schedule. Board Action: Emmons & Olivier Resources, Inc. 4 8/23/07 Decision Notice for Wetland Exemption/No-Loss Minnesota Wetland Conservation Act Mailing Date: 8/24/07 LGU: Rice Creek Watershed District (RCWD) 4325 Pheasant Ridge Drive NE, Suite 611 Blaine, MN 55449 Project Name: Creative Kids Daycare RCWD Ref. #: 07 -083 Location: Centerville, Anoka County Name of Applicant: Arc Builders Date of Decision: 8/22/07 Wetland Decision Type: Wetland Exemption/No-Loss Description of Decision: The RCWD Board of Managers conditionally-approved a final site grading and drainage plan involving 1831 sf of Type 2 wetland fill (non-shoreland zone) eligible for the WCA deminimis exemption (8420.0122, Subp. 9) /~z~ . ;Z;~ ~ ~ Ken Powell, Permit Coord., Prof. Wetland Scientist ~/?r;O? Date C: MN Board of Water and Soil Resources, A TIN: Lynda Peterson U.S. Army Corps of Engineers, ATTN: Tim Fell Anoka Conservation District A TIN: Dennis Rodacker MN DNR Ecological Services A TTN: Mike North City of Centerville Applicant, Consultant II f ~ ~ . ~ o. ! ~ ~l ~ d '; . J t'e~ t '. i. ~, ,p~ i <~~~ _ 2- ,;. ~~i!h "i~ ~ ~~~,; l f i~ }~t'f'r!q!pHn_, p~a~l~~ I ~ .f~ W,!L! hJ'.qp I' nihr,!~\;' ~,,: "E~r :!qnd~t~Hn~n~~~.lnndd~ t If<Hqi<...ur "c~iiii~nnnnn~ ~ ! ~Jillilllllll~~I~~~le2~~~~~~~~~~i~~~ ~ ~ IUHUiHHiUHBHHnH~nnn~~ .~. ~. . ... ... .''''''',iiiltO t . I I I ", _ , i I: . . . of f . <' . . 0 II Ii .. . . '"P"'\ ~ .r\, V r- _ \' '\ "\ = ~ 'l;j {p W:::\~lS C > ""J~ \ .a) I 8 ~ ~O ~:2i 0) '" r ~ . · t ~ ~ ~ ~ i i 'll 'E ~ ~ i. i elDI '" I (f"j:.t (.) 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