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Home My WebLink About6.a. Authorize Development of Well 16ROSEMOLINTEXECUTIVE SUMMARY UTILITY COMMISSION Utility Commission Meeting: September 9, 2013 AGENDA ITEM: Authorize Development of Well 16 AGENDA SECTION: New Business PREPARED BY: Andrew J. Brotzler, PE, Director of Public Works /City Engineer AGENDA NO. ATTACHMENTS: Map, Preliminary Plat APPROVED BY: KI RECOMMENDED ACTION: Motion to authorize the development of Well 16 ISSUE With the increase in development over the past several years, the planning and development of Well 16 is necessary to support continued development. BACKGROUND Following the completion of Well 15, an evaluation and summary of the available water supply capacity for development was completed. Based on the development that has occurred and approved development plans since the completion of Well 15, the city's water supply system can support an additional 400 to 600 units of development before additional capacity is required. Based on a lead time of at least 2 years to develop a well and well house and bring it online, it is appropriate to consider the development of the next well, Well 16 at this time. Well 16 is planned to be located on property within the recently approved Bella Vista development as shown on the attached map. This location is consistent with the city's water supply plan and well field study. The scope and schedule for the development of Well 16 is outlined below. Development of Well 16 will include the following phases: 1. Design and construct a monitoring well near the center of the city in accordance with the DNR's requirements identified in the city's appropriations permit. 2. Design and construct a test well at the well 16 site to confirm geology and water quality data that will aid in the design phase. 3. Design and Construct Well 16 4. Design and Construct a pumping facility for Well 16 The DNR is requiring that the City install 3 monitoring wells in the Jordan formation. Two of the three G: \ENGPROJ \416 \20130909 UC Authorize Development of Well 16.docx monitoring wells in the Jordan formation requested by DNR in the appropriation permit have been installed. The City has been using MDH grants or combining the monitoring wells with other projects to fund the DNR's request and has therefore spread the work out over time to lessen the impact on the City's finances. The monitoring wells are as follows: 1. Test Well 14 at Well House 14 has been converted to a monitoring well. A data logger was installed and the city will be submitting data in the near future. 2. A monitoring well was installed at UMore Park along with the installation of an irrigation well project. That project was completed in spring 2013. A data logger has been installed and the City will be submitting data in the near future. 3. The 3rd monitoring well requested by the DNR will be installed this fall/winter near the center of the City as requested by the DNR. 4. An additional monitoring well (shallow) was installed by the City near Well House 14 to study the interaction between the shallow and deep aquifers. The city has applied for a grant from the MDH to investigate the condition of abandoned wells 1 and 2. It is known that they were capped, but it is unclear whether they were ever sealed. If former wells 1 or 2 have not been sealed the possibility of using one of the wells as the 3rd monitoring well will be assessed. Schedule The preliminary schedule for all phases is as follows: Phase 1 — Monitoring well • Assess the condition of Wells 1 & 2 • Prepare quote documents for converting well 1 or 2 or constructing a separate monitoring well • Submit design to DNR for approval • Obtain quotes and award contract • Construct monitoring well • Install data logger • Obtain data and submit to the DNR Phase 2 — Test Well • Design test well • Obtain quotes and award contract • Construct test well • Obtain geological and water quality data Phase 3 — Well 16 • Submit preliminary well application to the DNR • Design well • MDH /DNR review of plans & specs • Advertise for bids and award contract September/ October 2013 September- October 2013 October - November 2013 November - December 2013 January 2014 Spring 2014 Spring 2014 September- October 2013 October- November 2013 November- December 2013 December 2013 October 2013 November 2013 —January 2014 February - March 2014 March — April 2014 2 • Construct well Phase 4 — Well House 16 • Preliminary Design well house • Prepare plans and specifications • MDH review of plans & specs • Advertise for bids and award contract • Construct well house SUMMARY May — September 2014 April 2014 May — June 2014 July — August 2014 September 2014 October 2014 — Spring 2015 Staff is recommending that the Utility Commission authorize the development of Well 16. 3 z 128TH CO uj W > ST W > z 0 < 1 B3 co 130TH ST W KEEGAN LAKE 132ND CT W KEEGAN LAKE SRONZt- J.1 Cl BRASS D >- 133RD ST Al 7FZ LU Qdj 128TH z ST W LU CO .. 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I I I I I I J I I I I I > I I I I I _J oulLor a Call 48 Hours before digging: GOPHER STATE ONE CALL Twin City Area 651- 454 -0002 Mn. Toll Free 1- 800 - 252 -1166 DEVELOPMENT DATA PHASE 1 Existing Zoning AG Existing Guide Plan LDR; Low Density Residential Proposed Zoning R -1 (PUD) Total Site Area: 142.61 Acres County Rood 38 R.O.W dedication: 0.53 Acres Autumn Path R.O.W.: 2.50 Acres City /County Lands (Outlots E & F): 63.0 Acres Net Residential Area., 76.58 Acres Net Major ROW & City /County Lands 35' min. Proposed Single Family Lots., 158 Lots Density. 2.06 un /ac 158 Lots / Net Resid. Area 76.58 ac. rear yard Wetland constraints. LOT STANDARDS Single Family PHASE 1 Lot Width (O Front Yard Setback) 75' Min. Lot Depth 125' Min. (130'+ overage) Minimum Lot Area: 9,499 s!. Average Lot Area: 17,695 st. Front Yard Setback s25' Typ (20' Min.) Side Yard Corner Lots 25' Side Yard Setback 75%75' : 15' Total Rear Yard Setback 30' Setback to Autumn Path (fut. collector) 35' min. Setback to County Road 38 70' as shown Structure Setback to wetland buffers 5' min. -Note. Lots marked with . (Blocks 2,3,4,& 10) have reduced front setback to 20' due to rear yard Wetland constraints. FINAL PLAT PHASING PLAN PHASE 1 – 28 LOTS PHASE 2 – 44 LOTS PHASE 3 – 40 LOTS PHASE 4 – 46 LOTS TOTAL – 158 LOTS PHASING NOTBS 1. GRADING CONSTRUCTION LIMITS OF EACH PHASE OF THE PLAT MAY EXCEED LIMITS OF PLATTED LOTS IN ORDER TO BALANCE SITE. 2. ALL PROPOSED WETLAND IMPACTS AND MITIGATION AREAS WILL BE CONSTRUCTED WITHIN PHASE 1 CONSTRUCTION. 3 CONSTRUCTION OF THE INFILTRAT70N BASIN WILL BE COMPLETED IN 3 PHASES BEGINNING WITH PHASE 1 CONS7RUCTON AND COMPLETING IN PHASE 3 CONSTRUCTION. EACH OF THE FIRST TWO PHASES ON THE INFILTRA77ON BASIN CONSTRUCTION WILL BE OF ADEQUATE SIZE AS TO PROVIDE THE REQUIRED INFILTRATION AREA CALCULATED USING THE NEW DEVELOPMENT AREA OF EACH OF PHASES 1 & 2. Typical 75' Single Family Lot 30' REAR YARD SETBACK Bella Vista Rosemount, M nnesota 10.0' Rear Easement ��=a,.�a�Na SIDE YARD SETBACK it 9 LOT NUMBER Side Easement it II 10.0' Front Easement 25' Front Yard Setback STREET 0' 200' 400' 600' NOT FOR CONSTRUCTION 0000586dpp01.dwg Date 04 /30/13 Sheet 3 OF 38 W mood ^O�d1� `' �"` ' °veby `°� `s" w. �° ° °"F°ad " e. a �- 1s99 an.9nn, mne a5.c .uye.wo..�a w.. 1 wn . awy aamaa LnNOSCwea Eden F Ha MN 5534{ e� �-� d - WO NE 952 - 9311150 FM 952-93) -5613 Tom — 1-185-931-5150 Cory L Meyer 04/30/13 26971 W65'tVY000I www.venwoodp..alm nee Ilmn Nn A^d_ Dedoed cut Prepared for. Lennar Corporation ]6305 36th Avenue North Suite 600 Plymouth, M nnesota 55446 Bella Vista Rosemount, M nnesota Development Plan & overall Preliminary Plat ��=a,.�a�Na CherlmR CI.M_ �� aM s.®a on .e a e ra.ea