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ITEM 6.2 Valerius Meadows0 ots1101 o MINNESOTA g DEPARTMENT INFORMATION Request for City Council Action ORIGINATING DEPARTMENT: REQUESTOR: MEETING DATE: Public Works City Engineer Wagner June 13, 2016 PRESENTER(s): REVIEWED BY: ITEM #: City Engineer Wagner City Administrator Johnson 6.2 AGENDA ITEM DETAILS RECOMMENDATION: City Staff recommends approval of the proposed Minor Work Order No. 4, in the amount of $24,069.75 (100% City cost, no County) to construct an infiltration layer outlet system for storm pond No. 5 near the Valerius Meadows property along 70th Street/CSAH 37 Improvement Project. ARE YOU SEEKING APPROVAL OF A CONTRACT? IS A PUBLIC HEARING REQUIRED? No No BACKGROUND/JUSTIFICATION: Storm Pond #5 located along the south side of the 70th Street/CSAH 37 project, on the Valerius Meadows property, has been holding water without draining down as designed. Many discussions and site visits have occurred since February 2016 and a few options have been presented to the Council and affected property owners. The previous option presented to and approved by the City Council required replacing the plugged draintile (being used by the pond as an outlet) with 1,285 feet of new draintile from the pond to the existing discharge point to the southeast. This option required a temporary easement to construct the draintile. This option was rejected by the property owners as the installation of the new draintile would have required an agreement in which the draintile would have been turn over to the property owners to use and maintain. A quote of $19,734.00 was receive from Fehn Companies, the general contractor of 70th Street project, was received. It should be noted that this option probably may have incurred additional costs to repair existing draintile that would have been cut/damaged by installing the new draintile across the farm fileds. The current option is to provide an infiltration layer outlet system for the pond. A soil boring was done directly adjacent to the pond and it was found that the glacial washout (sand and gravel) is approximately 21' below the bottom of the pond. The clay material below the pond will be removed down to the more pervious glacial washout. This will allow storm water to drain through a layer of gravel and into the glacial washout. During stretches of dry weather it can be expected that this pond will be completely dry. Attached is the construction plan showing the work necessary to construct the infiltration layer. Also attached is the Minor Work Order No. 4 which details the work necessarv. Most items we had contract unit prices for with the exception of the Mobilization, Dewatering, and Hauling and Disposing of the Excess Material. Staff negotiated with general contractor, Fehn Companies, for these prices. The estimated cost for MWO #4 is $24,069.75. MNDOT has stated in writing that the work would be State Aid eligible. SUPPORTING DOCUMENTS: x ATTACHED ❑ NONE List: Minor Work Order No.4 Plan Sheet of Pond Improvements POSSIBLE MOTION Please word motion as you would like it to appear in the minutes. Motion to approve proposed Minor Work Order No. 4 for the 70th Street/CSAH 37 Improvement project, in the amount of $24,069.75 (City portion = $24,069.75). BUDGET INFORMATION FUNDING: BUDGETED: x YES MSAS Funds Region 7W Federal Funds ACTION TAKEN ❑ NO ❑ APPROVED AS REQUESTED ❑ DENIED ❑ TABLED ❑ OTHER (List changes) COMMENTS: RION] OF WAY ® I-- ABTIWUTw BILL% POND 5 ----- EYwRARr swPE u EYFN NWL=939.50 — — RERYANE. H 2 YR= 941.65 10 YR HWL= 942.61 100 YR HWL= 943.47 185+007- ---186+�00-1° 0187+00—___�46—___,: —r— __ DRAINTILE/INFILTRATION RING TO NWL. FILL WITH GRANULAR BORROW (1 CY) DISCONNECT 8" DRAINTILE FROM EXISTING DRAINTILE AND PLUG ALL STUBS. � pjro \--RE—GRADE TO FORM BERM (4:1 SLOPES) WITH !•—TOP ELEVATION OF 945 WITHIN PERMANENT EASEMENT.' \ DO NOT FILL OUTSIDE OF EASEMENT. RESEED, MULCH, AND FERTILIZE. (D\ / / ! i �sFlar cRAM11AR awxALE u]u EiF/= 931.I -+I ""� � I - do (EOR INFlLTRATpN DYER i fl[NGM) _ ]N OY BH.O i, Y - I �-4WAIRIIAA DRVNAGE IATER � FILL (nFAY) > I6f LY CANNELT flFNCH_��.� SIBS AlIS I - O g ORAIMAR BORROW = fA BxR.n I 9 T oP OF OIACYI ---RASP I , pFFFRENC[ NOTES• m FlLL YAIF M OF 116IlTRAlNIN /AG ELEV= 91IS � . �� I � %. GUOIIL WA]NaIT (O9ANYURY pRwW ANO TOPSOIL IrtTFA wBBWONBII SHALL BE PAID AS HEY 2103 - GRANOW BORRON. RING FILTRATION TRENCH _ - a INFILTRATION ( G-m) - AREA < 0] W11PA�Orm nou nuii SM. i iecEro wm•FT saLs. nor ro scAIL e�L ® Hakanfion Anderson a, � A- ,,,e L,,,e swwvvryryuu Jwl THR ATE.. SS161 A � O /g� W 4T /yo ego PONa RE / ON 2 70TH STREET 12-0 37 S.P. 217-112-002 Bzn-2 ", FO 7 -421— ]fit-txi-]99O FU( )W-{z]-OSw r...mtwm-e ee�,Rn.cem JV� MIWWuorw S.P. 066-637-033 9B STATE AID FOR LOCAL TRANSPORTATION WORK ORDER FOR MINOR EXTRA WORK Rev .July 2010 Page 1 of 2 SP 217-112-002 & 086-637-033 Minn. Proj. No. STPM 8615 (153) WO No. 4 Project Location: CSAH 37/70th Street, Otsego, MN Local Agency: City of Otsego Local Project No. 14-01 & 14-02 Contractor: Fehn Companies Contract No. Address/City/State/Zip: 5050 Barthel Industrial Dr, Albertville, MN 55301 Total Work Order Amount $ $ 24,069.76 At the direction of the Engineer, the Contractor performed the extra work as described below necessary to fully complete the Project as contemplated and within the allotted time frame. Pond #5 is not draining as designed due lack of flow through the existing downstream draintile. To provide the pond with an adequate outlet an infiltration layer shall be excavated and installed from the bottom of the pond to the Glacial Washout below the pond. A soil boring was done at the pond location and the Glacial Washout material was located approx. 21' below the bottom of the pond. The pond shall be dewatered prior to any work taking place. The newly placed 8" draintile shall be disconnected from the existing draintile in two locations. The existing draintile shall be restored (i.e. plugged or sleeves) to previous conditions. This work shall be paid as Item 2502-Drainage System. A 5' wide trench shall be dug from the bottom of the infiltration ring to below the Normal Water Level and filled with granular borrow (1 CY) to provide drainage from the pond infiltration ring. The infiltration area shall be excavated (747 CY Muck Excavation) to the dimensions and elevations shown in the attached Exhibit. Some of this material (385 CY) shall be used to create a berm along the east end of the pond. All excess material shall be hauled and disposed of off -site (363 CY). All areas shall be restored including 4" of topsoil filter material (32 CY) over the infiltration area. This topsoil filter material shall be paid as Item 2105 Granular Borrow as it was with the original contract. The final competition of the project will be extended from June 15th, 2016 to July 1St 2016 though the paving of the final lift of bituminous wear course shall still be completed by June 15' , 2016. Estimate Of Cost: (include any increases or decreases in contract items, any negotiated or force account items.) "Group/Funding Category Item No. Description Unit Unit Price + or— Quantity + or — Amount $ 2 2021.501 Mobilization LS $3,000.00 1 $3,000.00 2 2104.505 Muck Excavation (EV) CY $4.31 748 $3,223.88 2 2105.522 Granular Borrow (LV) CY $10.67 936 $9,987.12 2 2105.601 Dewatering LS $1,500.00 1 $1,500.00 2 2105.609 Haul and Dispose of Excess Material (EV) CY $15.05 363 $5,463.15 2 2502.502 Drainage System LS $750.00 1 $760.00 2 2574.508 Fertilizer Type 1 LBS $0.77 100 $77.00 STATE AID FOR LOCAL TRANSPORTATION Rev .July2010 WORK ORDER FOR MINOR EXTRA WORK Page 2 of 2 2575.502 Seeding Mixture — 25-141 LBS $4.08 12 $48.96 2 2575.501 Seeding AC $102.00 0.20 $20.40 Net Change this Work Order $24,069.75 "Group/Funding category is required for Federal Aid projects Due to this change, the contract time: (check one) () Is NOT changed (x) May be revised as provided in Mn/DOT Specification 1806 ( ) Is Increased by Working Days (x) Is Increased by 16 Calendar Days ( ) Is Decreased by Working Days ( ) Is Decreased by Calendar Days Approved by Project EngineerX�y Date: 7 l6 Print Name: / Al Phone: ?c5 y;2 7 - S 6 6 Approved by Contracto : .� Date: ' Print Name: � .S Phone: 7� ��7� 2�F' Distribution: Project Engineer (Original), Contractor (copy), DSAE (copy for funding review) DSAE Portion: The State of Minnesota is not a participant in this contract. Signature by the District State Aid Engineer is for FUNDING PURPOSES ONLY and for compliance with State and Federal Aid Rules/Policy. Eligibility does not guarantee funds will be available. This work is eligible for: _ Federal Funding _ State Aid Funding _ Local funds District State Aid Engineer: Date: