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9.a) Staff Report-Subgrant Agreement with Washington County HRA � � ,� � l �-. �.� ��l � �� SCANDIA Staff Report Date of Meeting: November 19, 2013 To: City Council From: Kristina Handt, Administrator Re: Subgrant Agreement with Washington County HRA Background: Last month the Council approved an amendment to the Washington County All Hazard Mitigation Plan to add text with regards to the construction or maintenance of safe rooms or the retrofitting of an existing structure to be utilized as a safe room. This new text allowed entities to apply for grant funding for these types of projects. The Washington County HRA originally contacted the City about building two storm shelters at the Cottages in August but had to wait for this plan amendment to be adopted before moving forward with applying for FEMA funds. Issue: Should the City enter into a subgrant agreement with the Washington County HRA in a FEMA grant for storm shelters at the Cottages? Proposal Details: Bill Lightner, Project manager, Washington County HRA will be at the meeting to answer any questions about the project. There is a project report and estimate included in your packet for some background information. Please note the project was revised since the first report in August and the cost has been reduced by approximately $30,000. Also, while the well issues are included in the report,they are not part of the FEMA grant application. Included in your packet is Resolution 11-19-13-05. This resolution authorizes the execution of a subgrant agreement with the Washington County HRA for the two storm shelters at the Cottages. The format of the resolution has been provided by the Department of Homeland Security and Emergency Management to meet the FEMA requirements. It notes the 25% local match will be paid by the HRA,that a funding agreement would be entered into if the grant is awarded and authorizes the City Administrator to sign the subgrant agreement. The agreement that would be signed is titled Commitment of Funds. A copy of the Letter of Maintenance is also included in your packet. The HRA, not the City, has to sign this but it is provided for your information. The grant application also requires a public notice in the paper, which the HRA will take care of. Fiscal Impact: The 25% local match for the grant would be provided by the HRA. The HRA would also take responsibility for the maintenance so there would be no cost to the City. Options: 1) Approve Resolution 11-19-13-OS 2) Amend and then approve Resolution 11-19-13-OS 3) Do not approve Resolution 11-19-13-OS Recommendation: Option 1. CITY OF SCANDIA RESOLUTION NO. 11-19-13-OS Resolution Authorizing Execution of Sub-grant Agreement WHEREAS, the Oakhill Cottages property (the "Property") at 14600 Oakhill Court North is located in the city of the Scandia, Minnesota WHEREAS, the Washington County Housing and Redevelopment Authority (the "Authority") owns and operates the Property; and WHEREAS, in the interest of resident safety, the Authority has determined the need to construct storm shelters (the "Project") at the Property to act as an area of refuge during severe weather events; and WHEREAS, funding from the Federal Emergency Management Agency's Hazard Mitigation Assistance program (the "Program") administered by the Minnesota Department of Public Safety Division of Homeland Security and Emergency Management is now available for such projects; and WHEREAS, the City of the Scandia (the "City") has adopted the Washington County All Hazard Mitigation Plan (the "Plan") as amended to include storm shelters and is an eligible grant sub-grantee as a participant in the development of the Plan; and WHEREAS, the Program requirements allow for the Authority to submit funding applications on behalf of a Project location City and act as the primary administrator of the grant; and WHEREAS, the Program requires a 25 percent local funding match which is estimated to total $42,284 and will be paid by the Authority with no obligations from the City for this or any portion of the project costs; and WHEREAS, upon notice of a successful Program funding application, a funding agreement will be developed to govern the administration and disbursement of the Program grant; and WHEREAS, one of the funding application submittal requirements is a resolution from the sub-grantee authorizing execution of a sub-grant agreement. NOW THEREFORE BE IT RESOLVED, that the Citv of Scandia enter into a sub-grant agreement with the Division of Homeland Security and Emergency Management in the Minnesota Department of Public Safety for the program entitled Hazard Mitigation Assistance. Kristina Handt, City Administrator is hereby authorized to execute and sign such sub-grant agreements and any amendments hereto as are necessary to implement the project on behalf of City of Scandia. Adopted by the Scandia City Council this 19th day of November,2013. Randall Simonson, Mayor ATTEST: Kristina Handt,Administrator/Clerk Letter of Commitment of Funds Washington County Housing and Redevelopment Authority 7645 Currell Blvd. Woodbury, MN 55125 As a participant in the Washington County All Hazard Mitigation Plan,the City of Scandia(the "Sub-grantee") is eligible to be a potential sub-grantee in the Hazard Mitigation Assistance ("HMA") Program. The Washin�ton County Housing and Redevelopment Authoritv (the "Owner") is a unit of local government and owns the property where the proposed Oakhill Storm Shelter Project(the "Project") funded by HMA is located. The Owner will act on behalf of the Sub- r�to apply for the HMA grant funds. The Sub- r�tee will be the grant recipient. A funding agreement will be developed upon notice of a grant award that describes the financial responsibilities of each party and must be signed before the Sub- r�ntee executes any HMA sub- grant agreement. The Owner hereby commits the matching funds necessary for the proposed Project located at 14600 Oakhill Court North, Scandia. MN 55073. The Sub-grantee will not pay for any costs associated with the Project with its own funds. After FEMA approval and during project implementation,the Owner acknowledges that it is responsible for providing a minimum of 25%of all eligible project costs or a minimum of 42 284 in local matching funds to comply with all grant cost share requirements. As signed, the Sub- r� a�, understand the responsibilities of a sub-grantee participating in the HMA program while acknowledging that the Owner will provide much of the administrative duties associated with the grant as the primary beneficiary . As signed,the Owner, hereby authorize the commitment of these non-federal funds for this proposed Project. Signature of Authorized Representative and Title Date (Sub-grantee) Signature of Authorized Representative and Title Date (Owner) Letter of Maintenance Statement Washington County Housing and Redevelopment Authority 7645 Currell Blvd. Woodbury,MN 55125 As a potential sub-grantee in the Hazard Mitigation Assistance (HMA)program, the Washin on County Housin�and Redevelopment Authorit�will perform the annual maintenance to keep the proposed project in conformance with all federal, state, and local laws and regulations for the life of the project. The estimated cost of the annual maintenance is $ As signed, we understand the responsibilities of a sub-grantee in the HMA and hereby name Washington County Housing and Redevelopment Authority will perform maintenance. Signature of Authorized Representative Date Feasibility and Cost Study Oakhill Cottages Storm Shelter and Well Improvement 14621-17689 Oakhill Court North Scandia MN 55073 Prepared for: Washington County Housing and Redevelopment Authority 7645 Currell Blvd. Woodbury,MN 55125 Bill Lightner, Project Manager ��. .�... „ va . � E". . :..., w �.y. v , x., _. ... �.� r,. .it �� '� t .5 � . T'j� . � .�� ' �`,�`.k. � �i � 4 �- -- --.. ��i . ....... ;r. . _.. � �, . . .. .. . ..i._ ._ . , .. , ... , --___- .'-------- ._ . _ . ._ . , . . --2-�. . _ � ..H; - �-., t�...y � - .._.,.�. ._ ..... .. ,. :. �...::. - - �� ...� .;.3j � � �� , -. - „ t x 1 - „ �e� _ . - . �,- ��w � � � ___ � ' '�_ �_ - ,t-t-t- -� � - � _ - � rt-�, _z y� � . .1 '� . � �� 'i - _ ; � � - r . .. . '�'___._ �_...._. ... ., -.. Y^ ., ) � il �. �r'�O�i: -fA - �� . _ .. .«. _ . .. _ . f.. �� . . . e.' '°��n.' 4�w.,,�'q'i �.�... „��.'.��'y5'4'4!yj�}i'N'.iYT.• .. . .... .. ... ... ... Miller Hanson Partners,Architects Loucks Associates, Civil Emanuelson-Podas, Well �'. and Planners Engineering Improvements Engineering Kent Simon, RA Todd McLouth, PE Travis Zipf, PE � .S Table of Contents: -Project Summary - Storm Shelter Design and Preliminary Construction Cost Estimate - Well Improvement Design and Preliminary Construction Cost Estimate August 23, 2013 Project Summary This study investigates preliminary design options and probable construction cost estimates for storm shelter and well improvements for the Oakhill Cottages. Storm Shelter The Oakhill Cottages are constructed as slab on grade townhouses, and as such there is no safe storm shelter area, which is a source of resident concern. The site is organized into two clusters of forty townhomes each; the distance between the cluster centers is approximately 500'. It was decided that two storm shelters, one for each cluster,would be preferable to a single shelter for the following reasons: • A single shelter cannot be sited to be close enough to all of the townhouses to be readily accessible in an emergency situation.Also, some residents are elderly and some are mobility impaired. • Combining the well tank structure with the shelter is efficient.At present, there is not a south well tank structure;this would be resolved with a new combined shelter/well structure design. • The site areas most promising for the new structure are not large enough to accommodate a shelter of sufficient capacity to serve the assumed potential number of shelter occupants. Proposed Design Features Location: The preliminary design solution locates one structure in the center of each cluster, between the detached garage buildings and adjacent the existing wells. Amenities: Each shelter will have toilet facilities and lighting and ventilation systems, as the design duration of the shelter occupancy is three hours. The likely use of the storm shelter is in the case of a tornado; winter occupancy is not expected. Therefore the shelters will not be heated, and the plumbing design will allow for the system to be drained for the winter. Each shelter is designed to accommodate 40 occupants with bench seating and provides full handicapped accessibility. Appearance: The shelter structures are similar in appearance to the garages which they adjoin;they are, however, constructed from reinforced concrete masonry, with a roof structure of precast concrete plank. Code Compliance: The preliminary design of the storm shelters follows the requirements and guidelines set forth in the ICC/NSSA Standard for the Design and Construction of Storm Shelters, ICC 500-2008; and FEMA P-320 Standards. Well Improvements The two areas of townhomes each have their own separate well for water usage. Well #1 is located between garages#2 & 3 in the south area of townhomes. The pressure tanks and associated piping, for well #1, is currently buried underground. Well #2 is located near garage#5. The pressure tanks and associated piping is located within a mechanical room attached to the end of garage#5. The Minnesota Department of Health (MDH)has contacted the Owner and has suggested that upgrades be made to each of the existing wells. The upgrades are as follows: - Connect the two wells to create a redundant water supply. Currently, if one of the wells fails to operate,that area of townhomes will be without water for an extended period of time.A pipe connection between the two wells will be a safe guard in the event that one of the wells fails to operate. The connection will allow each townhome area to draw water from the other area if needed. - Replace the underground pressure tank system for well #1 to an inside mechanical room. Currently, any routine maintenance or repairs requires a Contractor to excavate the area and expose the buried system. The buried system does not even allow a visual inspection of the pressure tank system. Shelter#1 is proposed to include a mechanical room which will house the pressure tanks and piping for well #1. Further discussion and costs for this upgrade are shown later. 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I E,�- __ k..�� - � ) � �. � � ';��`�� o '� ' ��/ DRAI D ��_._ t .�,, _./+: \ �, ' \ --% � \ � �. l /� ____- ��v��` ^`�`�� t�,.---�,�, . � •� , ORAWN BY: CDL PROJECT NUMBER: 13111.00 SUBMITTALS OAKHILL COTAGES � °��16�" SCANDIA, MINNESOTA ASSOCIATES ; Planning • 6Yvi1 Fmgineering • land SLrveliuS WASHINGTON COUNTY HRA landscsye eroe[tecture • sn►uonmental noo e�ta�t une,svie�aoo IUo¢eapoW,YlnnesoL 55969-5592 � Telephone:(783N24-5505 lai:(7Q3�424-5622 FIGURE 2 OF 3 0 STORM SHELTER #2 = UTILITY SERVICE � NORTH p to �� SCALE IN FEET � ✓ � �-- ✓ � �--/�, EXISTING � � ORA/N F/ELD l - � '' �� i� ��';:'� � -'/r' �� --f J EXlST1NG L1FT i%� '' � ( �' -� ,�— STA TION "�� \\ � J - /r � � � �4688 �\ �:..� � � � ��.,�` � � ,,,�r..:.�\ --� i �•, ,:� �i �_� .�.� 3 / ,ii /'i%�� \;_., ,;�..--..' � ��,,i �✓ �. � ` 14686 \ ;� � ,�� .% �� / i \j' r '.�\ /,% '\ /,,. %! ,,%�i�i'� \ 1\ �� 14684 .J O'S'\ �� \ � '� �_`i.P� .J� \ �^ j' % /,� ��, \ I'.,) �\%%% � \ /�, �� / /,, \ ��,,.\ \ 'f �f j \ !//. `\ \ �' �, '/� \� yp� ..1 Y �46 �� l.g, � � RAGE ' �1 \ / \ �y�\ � Y c `�o � '1� 89 / � '� '�\\ �p1 s \ �,� �/ �y�� / .,A GARAGE�,\ PROPOS�D 4"COPPER �,i� �/ "� ij �\.�,� "\ g \,� WATER SEI�VICE �\�;� r � �� \ ,T\ ;. �\ l¢6S7 1 -r�;., �,�' CONNECT EXISTING \ �� ,,.� , � \ �� \ � � �j �'� \ ,, ,�'" \,, ;4�^-`� ` � \ s � ;i�" ,/ �` , ��v \ � i, �, �� \:* x � / �,�, ��`�\t .%/ � \ /\_ � 14685 �, ,r i %' ,. ;y� � � � �� ,:i' ;� �r J, p G �.%f/, �; �� '\J y�O�OJ'�, � � •`�' \�. ::.. .. � . �-� 14683 � �, ��' � / ,n ,,,._..,�,.° , ,....� \\\', "'`�l,' �- ;\�\ r' �-. ..,,/ EXISTIT(�G DRIVE s �.. ` �� .�--� �. � `. '� S� ��y%"''�� 1468/ �� Z \, �\ `i, �. \�\ % \ `� ,\ ` /; ,� � CO ECT 4"PVC � - �\��'�� \� SANI RY TO � i�� -- ��. ��.%%, �\ \ EX„8 IC TANK ,__.._ E�c. snni,nar �.� � �, � -.�\ ��. \i �%, ;,,j � \ r,� / �!r.r:r:oir: �\, i',� 'j. �+ �'� ,1 � � � � � 'f DRAWN BY: CDl PROJECT NUMBER: 13111.00 SUBMITTALS OAKHILL COTAGES � °8,'si2°'3 SCANDIA, MINNESOTA I ASSOCIATES Plenning • LYvll�Sineering • I�nd SLtveyln6 W AS H I N G TO N C O U N TY H R A 6enaecepe erchitecture • snvironmental 7200 8emiock leae,S1ite 9Q0 YinneapoGe,Yfnuesote 5598A-5592 . TekpAone:�783k24-55U5 Fu:(783�24-l� FIGURE 3 OF 3 Civil Project Description Utility services for Shelters#1 and#2 Each shelter includes a bathroom. This will require new domestic water and sanitary sewer services to each building. Shelter #1 includes the mechanical room for the new pressure tank system. The new water service for the bathroom can be a simple plumbing connection inside the building from the mechanical room to the bathroom. The sanitary service would consist of a four inch sewer pipe to be installed and would connect to the existing septic tank located in the backyard area of unit#14643. See Figure 2. The sewer pipe will need to conform to specific elevations between the shelter and the septic tank, therefore it will need to be installed by the open trench method. Restoration would include; sidewalk, landscaping and sod. Shelter #2 does not have a mechanical room and will require new domestic water and sanitary sewer services. Figure 3 shows the approximate location of the services. The sanitary sewer service consists of a 4 inch sewer pipe connecting to the existing septic tank adjacent to the shelter. Minimal restoration is anticipated with this connection. The water service consists of a 3/4 inch water pipe connecting to the existing watermain along the front of the adjacent townhome units. Restoration would include; sidewalk, landscaping and sod. Estimated En�ineerin�and Construction Costs The engineer's opinion of costs for the service pipe connections are shown below. Item Shelter#1 Shelter#2 Construction Cost $3,000-5,000 $2,000-3,000 Engineering Construction Plans and Specifications $1000-1200 $600-800 Construction Inspection /Administration 600-800 600-800 Total Estimated Construction Costs $4,600-7,000 $3,200-4,600 Mechanical Proiect Descrintion Plumbin�for Shelters#1 and#2 The plumbing contractor traditionally begins his scope of work approximately five feet outside of the building wall. They will coordinate with the civil contractor, complete the domestic water and sanitary service work inside and near the building, and provide the installation of the plumbing fixtures. The restroom in each building will be equipped with an ADA-complaint water closet(toilet) and lavatory (sink). An instantaneous-style, electric water heater will be mounted under the lavatory and be capable of providing warm water on demand with minimum standby losses. All plumbing in the shelters with potential for freezing will be drainable and/or capable of being blown out with compressed air. Ventilation for Shelters#1 and#2 The design incorporates an exhaust fan in each restroom that will be interlocked with the light �witch operation. A timer can be integrated into the design to extend exhaust fan operation by a specified amount of time after the light switch is turned off. The common room will be ventilated by an exhaust fan and a combination louver / motorized damper assembly. A switch will be used to operate the system. No heat or air conditioning has been proposed. Electrical Proiect Descrintion Lightin�for Shelters#1 and#2 Each shelter shall consist of LED lighting. Interior lighting shall be surface mounted, enclosed LED strip lights in the main area. A wall-mounted light will be proviced above the mirror in the restroom. A surface mounted LED ceiling fixture will be provided in the entry. Exterior lighting shall consist of a cutoff LED wall fixture above the entry door controlled by an integral photocell. Emergency lighting will be provided inside the shelter. Self-contained 90-minute emergency lighting units will provide adequate emergency lighting during power outages. Emergency lighting will be provided at the exterior side of the shelter entrance above each door. This will also be a self-contained 90 minute emergency lighting fixture above the door. Power for Shelters#1 and#2 Power for each shelter shall consist of a meter/main with enough circuit breaker distribution to accommodate all shelter electrical loads. The meter/main will be served by the local utility company. Convenience receptacles will be provided. Connections to mechanical motors and other loads will be provided. Opinion of Probable Cost(Electrical� Item Total Lighting: $],800 each $3,600 Misc.: $400 each $800 Utility company costs: $2,000 each $4,000 Contractor Overhead: $2,000 Total: $10,400 Oninion of Probable Construction Cost(Mechanical� Shelter#1 —Plumbing(Includes piping and fixtures): $4,000 Shelter#1 —HVAC: $2,500 Shelter#2—Plumbing(Includes piping and fixtures): $4,000 Shelter#2—HVAC: $2,500 Total: 1$ 7,000 Opinion of Probable Engineering Fee (Mechanical and Electrical) $2,500 Opinion of Probable Construction Cost(Architecturall Shelter#1 Line item: Note: Amount: U�t� Unit Price: Tatal: 1. Earthwork: 5,000.00 2. Cast in place cancrete: -Footin s: 5.9 391.00 2 299.10 -Slab on ade: 66.3 221.00 14,647.90 -sidewalk: 20.8 sy 221.00 4,596.80 3. Precast concrete: -ceilin lank: 496.8 sf 10.20 5,067.40 4. Concrete mason : -CMU 1,696.2 sf 11.32 14,201.00 5. Rough carpentry: -r�f trusses: 698.2 sf 3.85 2 688.10 -wall furring, exterior 127.81f 2.35 300.40 -sheathin ,walls 1,022.4 sf 1.64 1676.70 -sheathin ,roof 952.0 sf 1.24 1 28.10 -interior partitions/ framin : 52.31f 13.11 585.00 6. Siding: -CFB& aint 1,022.4 sf 5.14 S 55.20 -startEr strip 127.9 ]f 3.10 396.40 7. Metal fascia: - efinishedmetal 98. sf 8.51 835.60 8. Soffit: - refinished metal 221.9 st' 4.38 972.00 9. Roofin : -shi les 9.5 129.20 1 30.00 10.Doors&hardware: -3'-0"HM doois ea 2,500.00 5,000.00 -3'-0"bath door 1 ea 1,500.00 1�00.00 -tank stor e door 1 ea 1,750.00 1,750.00 -6'-0"doors 1 ea 1,750.00 1,750.00 11.Finishes: -epoacy paint,bath walls 304.3 sf 1.45 441.20 12.Furniture: -benches 42.5 lf 50.00 2,125.00 Total: 78,645.90 Shelter#2 Unit Line item: Note: Amount: Unit: Price: Total: l. Earthwork: 5,000.00 2. Cast in place concrete: -Footings; 4.7 c 391,00 1,845.50 -Slabon ade: 55.2 221,00 12199,20 -sidewalk: 3.3 s 221.00 736.00 3. Precast concrete: -ceili lank: 496.8 sf 10.20 5,067.40 4. Concrete maso -CMU 1,557.2 sf 11.32 17,627.50 5. Rough carpentry: -roof trusses: 588.4 sf 3.85 2 265.30 -wall fin-ring, exterior 115.31f 2.35 271,10 -sheathing,wa11s 922.6 sf 1.64 1,513.10 -sheattdng,roof 816.0 sf 1.29 1,052.70 -interior partitions/ 24.1 lf 13.11 316.00 6. Siding: -CFB& airn 922.6 sf 5.14 4,742.20 -starter strip 1153 lf 3.10 357.60 7. Metal fascia: - refinished metal 87.6 sf 8.51 745.20 8. Soffit - refinished metal 202.2 sf 438 885.80 9. Roofin : -shin es 8.2 129.20 1,054.30 10. Doors&hardware: -3'-0'"HM doors 2 ea 2,500.00 5,000.00 -3'-0"bath door 1 ea 1,500.00 1,500.00 -6'-0"doors 1 ea 1,750.00 1,750.00 11. Finishes: -epoxy paint,bath wa11s 3043 sf 1.45 441,20 12.Furniture: -benches 42.5 lf 50.00 2,125,00 Total: 66,495.10 Grand total for both buildin : 145,141.0 Contractor's Pro�t and Overhead @ 10%: $14,514.00 Estimated Architectural and Structural Fee: $15,965.00 Total Cost Architectural: $175,620.00 Total Costs Summary Civil: $5,800-11,600 MechanicaL• $19,500 Electrical: $10,400 Architectural: $175,620 Grand Totals: $211,320-217,120 Well Improvement Design and Preliminary Co�struction Cost Estimate WELL CONNECTION � IMPROVEMENT N�� o so 5�,� �, �� \ \' J f�i�, _.. ,.. ��i � ''� `�, �%% � , \1 � - f, � �� i - + �-'�� f /'-� REMOVE EX.TREES � ��\ � �� . � � _ � �` ELL� V ' X/S /NG ME .�R �4 �� „__� 0 GARAGE �� \ WELL LOOP CONNECTION / � � OPTION#1 l ' 1 / \� � �� 2"HDPE OPEN �--� � \� ��\ CUT METHOD '"� .-- � l ' � � . \ � � � � � \ � .�. � � . • �� . � � � �f \� � �� \�� / � � 1 � SAW- T& G� RESTORE ,/ � WELL LOOP CONNECTION BITUMINOU r � OPTION#2 EXISTING DRIVE / / 2"HDPE DIRECTIONAL �/ /� BORE METHOD %� ----------- --- � - •._—_ . —::_=. _ _.�: -- I � �< >< >'� � PROPOSED �-• � _. "� � . �,;•_ y , i� i� � ❑ I r_ ! �,� L�.._... �.�T_ ~_......_. .._._ r..�TORM .�� ,":\ � �� i GAR�GE �i $H�LTER#1 �� --- �___�- ; l TING SI �. _... ._. ; __.�.... �' .T`-__�_a _ , �".._._._... � � : ___�__.... .__. _.__._.....__. .._._......------ �__..._.....__.._. ..._� L__._.... _: -- --___.._.__. _.._...-- ..._._._._._.�:_- .-- f...__----..__. �_..., ._._._� ---- - � ._.._ _. _._ _... , � �� -- �) , r—__�, .. ____._--� _._.. � . � .. f , i _ . �— - -}—:.;- ��:. .—� _ ` �� ; — -....�_.�--�-- .. ,..... ,. .., ._.._ _ ... �...�:� E .�.. _.- � . - _,, :. . .. �,t,_.-Z �`.�: . , : . .o� �• �--__'. .��.,�:.�,,— �c � .. , _,�. . - T,..._.......�. . ` ._..-.�:.:_:� I.,_�.__y.,:.:.U't" �T�.e , ._.r�::.�� _..: ... T. �� ..r.. ��; u�...._._.,_ �. � '' '') .^-.A •�. :; , , ,: ; r , , �� i� � �� ORAWN BY: CDL PRO,�CT NIR�IBER: 13111.00 SUBMITTALS OAKHILL COTAGES � � - °�� SCANDIA, MINNESOTA ASSOCIATES P��[ ' ��6��6 • ��J�6 WASHINGTON COUNTY HRA ►.na�.r��wta�,�.� • eo.��+,u 7LW Hembek lene,Stirik 900 Ifiene�poNe�YlmeroL 55986-5592 , relepEene:(•l63}�24-,,�5 1�:(,76yH24_� FIGURE 1 OF 3 Well Connection Options The connection between the two wells will require a two (2) inch diameter pipe to be buried in the ground. The options to consider are the types of construction necessary to install the pipe. The two options are; open cut/trench or directional boring. Each is discussed below: - Open Cut/Trench Method This method consists of excavating a trench from well # 1 to well #2 and burying the pipe. Figure 1 shows the proposed pipe location. This method would require that a portion of the existing bituminous parking area be removed and replaced. It would also require the removal of several trees and turf restoration. - Directional Bore Method Figure 1 shows the proposed boring location. This method is a specialized drilling technique in which a boring machine steers a guided drill head along a predetermined path. The drill head can be guided to avoid obstacles. This method works well for pressure pipes such as water lines. This method does not require open trenching for pipe installation. The boring machine drills a horizontal hole under the ground for a specified distance and then the piping is pulled back through the open hole. Excavations are only necessary at the ends of the pipe and would be limited to a 15 by 15 foot area. Therefore, no disturbance is anticipated to either the parking area or the existing trees. Turf restoration will be necessary at the excavated ends. Estimated�n ing eerin�and Construction Costs The engineer's opinion of costs for the well connection pipe is shown below. Item Onen CudTrench Method Directional Bore Method Construction Cost $20,000-24,000 $18,000-20,000 Engineering Construction Plans and Specifications $3,000-3,500 $2,500-3,000 Construction Staking $600-800 $600-700 Construction Inspection /Administration $2,000-2,400 $1,800-2,000 Total Estimated Construction Costs $25,600-30,700 $22,900-25,700 . Mechanical Project Description; Well Improvements. Well Interconnection As described in the scope of service, the existing wells will be interconnected using a two inch HDPE pipe. Should one well fail to operate, the drop in pressure will be sensed by a pressure sensor/ switch. When activated,the switch would cause a normally closed solenoid valve to actuate open, allowing water to flow from the piping of the operational well to the piping of the non-operational well. The new pressure switches will be installed in the piping located in the mechanical room of Shelter#1, and wired to a wall-mounted panel. An alarm light will be activated when the solenoid valve is actuated. H�ro�neumatic Tank Selection Minnesota Plumbing Code outlines a calculation technique to determine peak domestic water demand for each residential living unit and group of units. Using this technique, we have determined that the peak water demand on each well is 65 gallons per minute. Upon review of the identification tag on the well serving buildings 5 — 8, the well was listed to provide 70 gallons per minute, so we feel that our calculations are inline. The identification tag for the well serving buildings l —4 was not available. While the plumbing code allows for some diversity in usage, it is possible that this calculated peak water demand is not representative of the conditions at these dwellings. The peak domestic water demand is used to calculate the size of the hydropneumatic tank(s), also known as pressure tank(s), for each well. We have completed our review of the existing pressure tank selection for buildings 5 — 8 and determined that it appears that it is suitable for approximately 20 gallons per minute of water demand,assuming a two minute well motor running time. A two minute well motor runtime time is the minimum recommended for all pumps greater than 3/4 horsepower. This reduces that potential far short-cycling of the motor, resulting in longer life. As we were unable to verify the size of the hydropneumatic tank(s)serving buildings 1 —4, we cannot perform a similar analysis. We were unable to determine the methodology of how the current pressure tank selection was made for this facility, as it differs significantly from the code analysis. It does, however, appear to be serving these dwellings satisfactorily, as our inquiries have not indicated frequent pressure problems or a history of well-cycling or well motor replacement. As a result, our cost estimates include values for both pressure tanks sized per the current and code concepts. Opinion of Probable Construction Cost(Mechanical� Item Total Shelter#1 —Pressure Tanks(match design of bldgs 5 - 8): $4,000 Shelter#1 —Pressure Tanks(code design): $12,000 Shelter#2—Pressure Tanks(upgrade to code design): $7,500 Total: 32 500 Opinion of Probable Cost(Electrical) Item Total Service Entrance: $800 each $1,600 Power: $600 each $1,200 Motar Connections: $600 each $1,200 Well Controls: $1,800 total $1,800 Contractor Overhead: $2,000 Total: $7,800 Opinion of Probable Engineering Fee(Mechanical and Electrical) $2,500 . . Total Costs Summary Civil, Option # 1: $25,600-30,700 Civil, Option #2: $22,900-25,700 Mechanical: $32,500 ElectricaL• $7,800 Grand Total, Option # 1: $65,900-71,000 Grand Total, Option #2: $63,200-66,000 Oakhill Storm Shelter Previous scheme New scheme architectural shelter#1 78,645.60 shelter#1 65,052.14 shelter#2 66,494.60 shelter#2 56,691.10 total for both shelters 145,140.20 121,743.24 architectural w/contractor shelter#1 86,510.16 shelter#1 71,557.35 overhead shelter#2 73,144.06 shelter#2 62,360.21 total for both shelters 159,654.22 133,917.56 architectural &other work shelter#1 95,645.60 shelter#1 78,252.14 shelter#2 79,694.60 shelter#2 69,891.10 total for both shelters 175,340.20 148,143.24 architectural &other work w/ shelter#1 105,210.16 shelter#1 86,077.35 contractor overhead shelter#2 87,664.06 shelter#2 76,880.21 total for both shelters 192,874.22 162,957.56 note: consultant fees are not included disclaimer: the cost of all work is an estimate, actual contractor quote required