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Home My WebLink AboutDiscover Crossing Bridge THE CITY OF LAKE ELMO STAFF REPORT DATE: 9/10/2019 DISCUSSION TO: City Council FROM: Marty Powers, Public Works Director REVIEWED BY: Kristina Handt, City Administrator BACKGROUND: As identified in past years,the block retaining walls at the Discovery Crossing Bridge are failing. Earlier this summer Public Works fenced off and closed the stairways along the bridge. The steps are becoming a safety hazard and the four block columns on each corner of the bridge are unlocking, leaning and are no longer secure. Criterium-Schimnowski Engineering has been involved in investigating the site in the past and revisited the site recently. In minimizing potential cost their recommendation is to remove the steps and the majority of the block walls and columns, add shorter boulder walls and regrade the site. Public Works requested proposals from four contractors to complete the work as described. Only two submitted bids. ISSUE BEFORE COUNCIL: Does the Council have any additional questions about options to improve the Discovery Crossing bridge site? Should the City move forward with removing and improving the site? PROPOSAL DETAILS/ANALYSIS: The City received two proposals to remove the majority of the block retaining walls, create new boulder walls and landscape the site. Contractor Project Cost Miller Excavating $45,058.81 GT Lawns/Genadek Excavating $101,600.00 FISCAL IMPACT: The cost to accept Miller Excavating's Proposal to improve the Discovery Crossing Retaining Walls should not exceed$50,000. The extra$5000 would be for unforeseen issues or creating railings should extensions be needed. ATTACHMENTS: • Two proposals • Site Photos Page 2 MILLER MILLER EXCAVATING, INC. FWAVATING 3741 Stagecoach Trail North Stillwater,MN 55082 Estimator: Steve St.Claire Phone/Fax: 651-439-1637/651-351-7210 Email: office@millerexc.com Quote To: City of Lake Elmo Job Name: Discover Crossing Retaining Wall 3880 Laverne Ave N Job Address: Lake Elmo,MN 55042 Job Location: Lake Elmo,MN Attn: Marty Powers Phone: 651-747-3900 Date: August 27,2019 Email: mpowers@lakeelmo.org Estimate#: 19313 ITEM DESCRIPTION QUANTITY UNIT AMOUNT 100 MOBILIZATION 1.00 LS 110 REMOVE SMALL TREES&BRUSH 1.00 LS 120 REMOVE RETAINING WALL&STEPS 4.00 EA 130 BOULDER RETAINING WALL 161.00 TON 140 COMMON BORROW(IV) 280.00 CY 150 TOPSOIL BORROW(LV) 140.00 CY 160 SEED&BLANKET DISTURBED AREA 4.00 EA SUBTOTAL RETAINING WALLS $42,471.51 200 SAWCUT CONCRETE CURB 2.00 EA 210 REMOVE&REPLACE CONCRETE CURB 30.00 LF SUBTOTAL CURB $2,587.30 NOTES: Quote valid for 30 days. Proposal based on one(1)mobilization to complete the work. Additional mobilizations to be charged at$300.00 each. Retainage as withheld by Owner. Not to exceed 5%. Sales taxes included(if applicable) No bond included Payment due within 30 days of initial invoice. Past due accounts will accrue 1.5%per month service charge. Standard insurance included. Gopher State One Call locates included 4 business days prior to start of work. Miller Exc.is not responsible for weather,utility conflicts,other contractors,strikes,lockouts,material shortages,acts of god, or other circumstances beyond our control that may delay the completion of the work. All items listed above are tied,unless arrangements are made PRIOR to bid opening. The information in this proposal is considered confidential between the two parties listed. All work to be completed during normal business hours.(Monday thru Friday 700 am to 500 pm) Page 1 of 2 THIS PROPOSAL HAS BEEN PREPARED ACCORDING TO THE FOLLOWING DOCUMENTS: PLANS:Per site visit SPECS:Per City standards&direction GEOTECHNICAL:None ADDENDA:None THE FOLLOWING ITEMS ARE EXCLUDED FROM OUR PROPOSAL: Surveying,staking,blue tops,or project layout Waiver of Subrogation Private utility locating Winter conditions(frost ripping,frost blankets,road restrictions,ground thawing,etc.) Vapor barrier,foundation insulation,or waterproofing Contaminated material testing,excavation,abatement,remediation. Traffic control Sweeping required for non-Miller Exc work. Final tolerance of aggregate base prior to concrete and/or asphalt Sod,hydroseeding,straw mulch Hand raking,rock removal,final tolerance prior to seeding and/or sod Soil correction Dewatering of site Concrete washout area Manhole or catch basin adjustments Rock excavation Retaining wall excavation or backfill Fence removal or reinstallation ROW degradation fees Downspout connections Concrete equipment or cleanout pads Landscaping or irrigation installation and/or repair Temporary access road grading,gravel,or removal Soil testing. Gradations for imported materials available upon request. Electrical or irrigation conduit installation Concrete or bituminous paving Wall removal to be directed in field by City PROPOSAL ACCEPTANCE We hereby accept the proposal for the work as outlined above and agree to the terms and conditions as listed. Any alteration or deviation from the work as specified above will become extra work over the estimate and will be paid as a change order to the original contract.Miller Excavating,Inc.is authorized to proceed with the work.Payment will be made according to the terns outlined above. Signed: Print: Title: Date: Page 2 of 2 13880 Tomahawk Dr. S � 0 Afton, MN 55001 LAWNS ESTIMATE Phone# 612-715-3637 Contact: Tim Wilmes RETAINING WALLS DEMOLITION EXCAVATION Incorporating courtesy, dependability and integrity into everything we do. 8/27/2019 Work to be performed: Retaining Wall Client Name: Lake Elmo Project description: Demolish and dispose of portions of the existing retaining walls where needed and leave the rest in place for structural support. Build new retaining walls based on an engineered plan (prices may change based on type of material used in wall construction). Import and place fill soil behind proposed walls to create more natural slopes that resemble the existing grades on either side of the bridge/road. Proposal includes: *SE stair side by pond area: Proposed wall 675 sf+demo and fill $35,000 *NE side: Proposed wall 360 sf+ demo and fill $18,000 NW side: Proposed wall 330 sf+ demo and fill $17,600 SW side: Proposed wall 576 sf+demo and fill $31,000 Proposal does not include: Handling of hazardous materials, permit fees, surveying, dewatering, soil correction, bridge repair, parking lot, road, driveway or sidewalk repair/replacement, finish landscape plantings, sod, seed, tree or stump removal, sprinkler repair, fence repair or installation, erosion control or engineering fee. Notice of Pre-Lien This notice is to advise you of your rights under the Minnesota Law in connection with the improvement to your property. Any person or company supplying labor or materials for this improvement may file a lien against your property if that person or company has not been paid for the contributions. Under Minnesota Law,you have the right to pay persons who supplied labor or materials for this improvement directly and deduct this amount from our contract price or withhold the amounts due them from us until 120 days after completion of the improvement unless we give you a lien waiver signed by persons who supplied any labor or materials for the improvement and who gave you a timely notice. $100 to schedule the project. t/z down at the start of the project and balance due upon completion. If you have any questions please call Tim at 612-715-3637. 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