The roof on the 1999 cafeteria addition (area L) is a ballasted EPDM and is reaching the end of its useful life. It is showing signs of aging such as bridging / stretching at roof perimeters and multiple previous repairs.
Roof Replacement 1999 Media Center Classroom Addition (16,150 sf)
The roof over the 1999 media center and classroom addition (areas A, and B) is the same vintage as the cafeteria roof. The wing has a ballasted EPDM roof.
Roof Replacement 1999 Band and 2002 Boys Locker Room (5,700 sf)
The roofs over the band room and the boy’s locker room are built up with gravel.
All roofs should be replaced in the next 3 to 5 years. Roofing system replacement will improve energy performance by increasing system insulation values, reducing leaks, and will reduce operating and maintenance expenses.
1999 Classroom wing
Band and Boy’s locker room
CHISAGO LAKES MIDDLE SCHOOL FACILITY CONDITIONS
CHISAGO LAKES MIDDLE SCHOOL FACILITY CONDITIONS
BUILDING ENVELOPE IMPROVEMENTS
MS-BE-1, 2, and 3: Roof replacement 1999 cafeteria addition (3,000 SF), 1999 Media Center Classroom Addition (16,150 SF), Band and Boys Locker Room (5,700 SF)
• Removal of old roof systems & wet insulation / deteriorated wood blocking.
• Polyisocyanurate insulation layers. R-30 with a minimum positive slope of 1/8" per foot to ensure proper drainage.
• Recovery insulation board to accept new roof system & provide a stop gap against thermal bridging from insulation fasteners.
• Multiply modified built-up roof system with gravel surfacing. Provides a "severe hail" rating.
• Pre-finished sheet metal copings & counterflashing at all perimeters and projections to protect against damage and UV degradation.
MS-BE-1, 2, and 3 Benefits
• Extend life of building
• Reduce energy cost
• Reduce leaks
• Reduce operating and maintenance expenses
CHISAGO LAKES MIDDLE SCHOOL FACILITY CONDITIONS
BUILDING ENVELOPE IMPROVEMENTS
Tuckpointing and Replace Damaged Brick, Clean and Paint Steel Lintels Above the Window Openings, and Install Through-Wall Flashing and Rope Weeps at Steel Lintels of the Original Building
In general, the brick masonry façade appeared to be in fair to good condition for its age. Previously repointed/repaired areas appeared generally in good condition. However, cracked mortar joints between the brick units were noted at several locations on the façade. Many of these cracks were around the steel lintel locations. Vertical cracking was noted in isolated areas. Many locations on the original building section do not have through-wall flashing. Weep ropes were missing in localized areas. A few locations have cracked, spalled, or broken bricks.
Install through-wall flashing at steel lintels of the original section of the building, provide with rope weeps. Tuckpointing and replacement of damaged brick is needed at this time.
The tuckpointing, cleaning of steel lintels and installation of through wall flashing should be conducted in the next 0-3 years.
CONDITIONS
BUILDING ENVELOPE IMPROVEMENTS
MS-BE-4 Tuckpointing and Replace Damaged Brick, Clean and Paint Steel Lintels Above the Window Openings, and Install Through-Wall Flashing and Rope Weeps at Steel Lintels of the Original Building
• Tuckpoint approximately 5,000 SF
• Install through-wall flashing
• Clean and paint steel lintels
• Replace damaged brick
MS-BE-4 Benefits
• Extend life of building
• Reduce leaks
• Reduce operating and maintenance expenses
CHISAGO LAKES MIDDLE SCHOOL FACILITY CONDITIONS
BUILDING ENVELOPE IMPROVEMENTS
Replace Stucco Finish Coat and Repair Concrete Columns on the North and South Elevations
Stucco façade elements appear to be in fair condition. Stucco cracks were observed in many locations. The stucco finish coat should be replaced to repair cracking and water infiltration to the supporting structure behind. Stucco cracking is likely due to exposure to the elements. The stucco is typically on the vertical surface. Moisture that enters through the stucco cracks is likely able to escape or evaporate, but it can lead to damage to the structure if allowed to continue. These repairs should be completed in the next 4-7 years.
Exposed concrete columns are present at original building elevations. The surface of the concrete was generally in fair condition. During inspection cracks were noted in several concrete columns. Delamination/spalling of concrete was observed at a few exposed concrete columns. Deteriorated, cracked, and/or delaminated concrete should be repaired. Cracks should be hammer sounded for any delamination of the concrete. Cracks without delamination may be repaired via crack injection. Delaminated concrete is to be cut out and patched with anappropriate patching concrete mix. Concrete repairs should be conducted in the next 0-3 years. This work is primarily needed at the north and south elevation, but localized concrete deterioration is present throughout the main portion of the buildingwhere exposed concrete structure is present.
CONDITIONS
BUILDING ENVELOPE IMPROVEMENTS
MS-BE-5 Replace Stucco Finish Coat and Repair Concrete Columns on the North and South Elevations
• Stucco removal and replacement (1,000 SF)
• Remove spalled/ delaminated concrete (30 SF)
• Patch concrete (30 SF)
• Crack injection (100 LF)
• Repair concrete sidewalk (100 SF)
MS-BE-4 Benefits
• Extend life of building
• Reduce leaks
• Reduce operating and maintenance expenses
CHISAGO LAKES MIDDLE SCHOOL FACILITY CONDITIONS
BUILDING ENVELOPE IMPROVEMENTS
Replace 4 sets of Storefront Entry Doors, Five (5) Exterior Single Doors, and Two (2) Garage Doors, Clean and Paint Remaining Doors.
The hollow metal swing doors are corroded at the bottom of the door frames. The doors and center mullion are showing signs of wear.
We recommend replacing the indicated exterior doors, including the hardware and locks. Re-key all the door locks to comply with the District-wide Schlage standard.
BUILDING ENVELOPE IMPROVEMENTS
CHISAGO LAKES MIDDLE SCHOOL FACILITY
CONDITIONS
MS-BE-6 Replace 4 Sets of Storefront Entry Doors, Five (5) Exterior Single Doors, and Two (2) Garage Doors, Clean and Paint Remaining Doors.
• Replace exterior doors and frames including hardware and locks
• Re-key all locks to District-wide Schlage standard
• Clean and paint remaining doors
•
MS-BE-6 Benefits
• Extend life of structure
• Reduce maintenance
• Increase security
CHISAGO LAKES MIDDLE SCHOOL FACILITY CONDITIONS
CHISAGO LAKES MIDDLE SCHOOL FACILITY CONDITIONS
CHISAGO LAKES MIDDLE SCHOOL FACILITY CONDITIONS
BUILDING ENVELOPE IMPROVEMENTS
Replace Sealant Around Doors, Windows and Control Joints.
Exterior sealant at window & door perimeters, control joints, and other areas of the façade was in poor condition. Weathering, splitting, and cracking of sealant was observed throughout the façade (Photos 16-18). Sealant is missing or has fallen out at some penetrations in the brick (Photo 19).
Exterior sealants deteriorate as a result of exposure to UV light, moisture, and temperature cycles. Sealants typically have a lifespan of 8-12 years depending on material, material quality, and application/configuration. Based on observed conditions, it appears that the sealants on the building have reached or exceeded their useful life.
Sealants are an important component of the exterior building envelope and in many cases are the first line of defense in preventing water entry into and through exterior walls. Deteriorated sealants greatly increase the potential for water entry.
Replace all window and door perimeter, control joint, and penetration sealant at the building façade, as well as any miscellaneous sealants present. These repairs should be completed in the next 0-3 years.
CHISAGO LAKES MIDDLE SCHOOL FACILITY CONDITIONS
BUILDING ENVELOPE IMPROVEMENTS
MS-BE-7 Replace Sealant at Doors, Windows, and Control Joints
• Replace sealant (approximately 8,000 LF)
MS-BE-7 Benefits
• Extend life of building
• Reduce leaks
• Reduce operating and maintenance expenses
CHISAGO LAKES MIDDLE SCHOOL FACILITY CONDITIONS
MECHANICAL AND PLUMBING
Controls; Pneumatic to DDC and Upgrade Existing DDC
The Chisago Lakes Middle School controls system is a combination of pneumatic controls and direct digital controls (DDC). Pneumatic control systems are less energy efficient and more difficult to maintain than modern DDC Systems. The controls system could use the following upgrades to bring the building’s controls system to the same standard as the rest of the District.
- Existing field mounted panels and wiring/conduit to remain
- Replacement of field devices
o Temperature sensors
o Static pressure transducers
o Humidity sensors
CHISAGO LAKES MIDDLE SCHOOL FACILITY CONDITIONS
o Differential pressure transducers
- Safeties and limits to remain unless faulty in the field during checkout
- Discretionary replacement of valve assemblies and damper actuators
o All pneumatics to be removed and replaced
o Electronic damper actuators and valve assemblies are brand and age dependent
All JCI damper actuators replaced with Belimo
If Belimo actuators are current, they will remain and be reused
- If there are existing pneumatically operating fire/smoke damper actuators, they will remain and stay in operation
Benefits of the DDC controls upgrade include improved occupant temperature control, reduced energy consumption, reduced maintenance, improved equipment scheduling and troubleshooting, alarm monitoring, operational tracking and trending of mechanical equipment parameters.
CHISAGO LAKES MIDDLE SCHOOL
MECHANICAL AND PLUMBING
MS-ME-1 Pneumatic to Direct Digital Controls (DDC) and Upgrade Existing DDC
• Replace all the pneumatic components with DDC on HVAC equipment that is being re-used as well as the new equipment
• Replace the existing failing DDC controls with the new building automation system platform with remote access
• Provide DDC controllers and control panels
• Provide all programming required for this conversion
MS-ME-1 Benefits
• Easy to use, modernized system control updates
• Improved building monitoring and maintenance troubleshooting
• Improved occupant comfort
• Extended heating system life
• Reduced energy consumption
• Reduced maintenance
CHISAGO LAKES MIDDLE SCHOOL FACILITY CONDITIONS
MECHANICAL AND PLUMBING
Remove Abandoned Boiler and Piping, Metal Mezzanine and Steam Piping, Install New Condensing Boiler Consolidate Pumps and Add Glycol Feed Station with Filter, Demolish Chimney. Demolish Steam and Condensate Mains.
The existing Middle School hot water boiler plant consists of one (1) 2011 Hydrotherm KN-30 boiler that is 3,000,000 BTUs (British Thermal Units) and one (1) 2010 Hydrotherm KN-20 boiler that is 2,000,000 BTUs. There is an old, abandoned steam boiler and piping that takes up a lot of space making it difficult for maintenance.
Nexus recommends demolishing the abandoned steam boiler and all steam piping in the boiler room to make the space more usable and accessible for maintenance. A new 3,000,000 BTU hot water boiler would also be added to accommodate future hot water equipment that is currently gas-fired. The new boiler would be a condensing style, high efficiency boiler that would provide a high-efficiency heating water plant to accommodate the entire building. Hot water pumps would be consolidated as part of this improvement as there are several existing sets of pumps that are difficult to maintain and operate together.
A side-stream filter would also be added so it can collect any particulate, debris, and rust within the water volume. The filter can also affect control valves and heat transfer surfaces. A glycol fill tank will also be installed to allow for ease of refilling the heating piping system when required.
Benefits of this heating system improvement include reduced maintenance, increased heating system life, and improved system operation.
CHISAGO LAKES MIDDLE SCHOOL
MECHANICAL AND PLUMBING
MS-ME-2 Remove Abandoned Boiler, Metal Mezzanine and Steam Piping, Install New Condensing Boiler, Consolidate Pumps and Add Glycol Feed Station with Filter, Demolish Chimney. Demolish Steam and Condensate Mains.
• Remove existing steam boiler and piping
• Install new hot water, condensing boiler and associated piping
• Consolidate heating water pumps
• Add glycol feed station and side stream filter
• Provide all roofing and sealing work as required
• Provide DDC controls, sequencing, and programming
• Provide all associated general construction and electrical work as required
MS-ME-2 Benefits
• Upgraded heating system
• Improved temperature control
• Improved occupant comfort
• Reduced maintenance
• Improved learning/work environment
CHISAGO LAKES MIDDLE SCHOOL FACILITY CONDITIONS
MECHANICAL AND PLUMBING
Remove Abandoned Classroom Unit Ventilators and Old Finned Tube Radiation, Install New Finned Tube, Remove Heat Exchanger and Connect Piping Directly. Patch Exterior Wall Openings
Nexus recommends the following upgrades to the buildings overall heating system:
- Remove abandoned classrooms unit ventilators and old finned tube radiation (FTR) and replace with new hot water FTR. The classrooms would be calculated to determine the heat loss of the space so the appropriate amount of FTR can be installed.
- Remove old FTR in stairwells where there is no exterior wall exposure, so it is no longer needed. Paint and patch wall as required to match existing wall.
- Remove water to water heat exchangers (Qty 3) and connect hot water piping directly to avoid the loss in efficiency from pushing through these devices.
Benefits of this heating system improvement include reduced maintenance, increased heating system life, and improved system operation.
CHISAGO LAKES MIDDLE SCHOOL FACILITY CONDITIONS
MECHANICAL AND PLUMBING
MS-ME-3 Remove Abandoned Classroom Unit Ventilators and Old Finned Tube Radiation, Install New Finned Tube, Remove Heat Exchanger and Connect Piping Directly. Patch Exterior Wall Openings
• Remove abandoned classrooms unit ventilators, old, finned tube radiation (FTR), and water to water heat exchangers
• Install new hot water FTR in classrooms and associated piping
• Paint and patch wall in stairwells where old FTR was removed
• Re-pipe hot water piping directly after removal of heat exchangers
• Provide DDC controls, sequencing, and programming
• Provide all associated general construction and electrical work as required
MS-ME-3 Benefits
• Upgraded heating system
• Improved temperature control
• Improved occupant comfort
• Reduced maintenance
• Improved learning/work environment
CHISAGO LAKES MIDDLE SCHOOL FACILITY CONDITIONS
MECHANICAL AND PLUMBING
Replace Four 1999 Roof Top Units, Two R-22 Air-Cooled Condensing Units and Replace Three 2002-2005 Roof Top Units
There are several rooftop and make-up air handling units serving the Chisago Lakes Middle School that are becoming maintenance problems for the District. These units are as listed below.
• 1999 AAON RTU-1 and mated 2005 ACCU-1 that serves classrooms. This rooftop air handling unit currently has R-22 DX cooling and hot water heating.
• 1999 AAON RTU-2 that serves the media center. This rooftop air handling unit currently has R-22 DX cooling and hot water heating.
• 1999 McQuay RTU-3 that serves the band area. This rooftop air handling unit currently has R-22 DX cooling and gas heating.
• 1999 AAON RTU-4 and mated 2005 ACCU that serves the cafeteria. This rooftop air handling unit currently has R-22 DX cooling and gas heating.
• 2002 AAON RTU-5 that serves the classrooms. This rooftop air handling unit currently has R-22 DX cooling and hot water heating.
• 2002 AAON RTU-6 that serves the classrooms. This rooftop air handling unit currently has R-22 DX cooling and hot water heating.
• 2005 AAON RTU-7 that serves the classrooms. This rooftop air handling unit currently has R-22 DX cooling and hot water heating.
• 2005 AAON MAU-1 that serves the kitchen. This rooftop air handling unit currently has R-22 DX cooling and gas heating.
CHISAGO LAKES MIDDLE SCHOOL FACILITY CONDITIONS
Nexus recommends replacing the seven (7) rooftop and make-up air handling units one for one with new double wall rooftop air handling units with hot water heating and DX dehumidification. The new rooftop air handling units would come with code compliant filtration, hot water heating coils, chilled water dehumidification coils, access sections, and supply fans with variable speed drives (VSDs).
The benefits of this HVAC improvement include increased system life expectancy, improved DDC scheduling, improved ventilation, increased energy savings, improved occupant comfort, and an improved learning and working environment.
CHISAGO LAKES MIDDLE SCHOOL
MECHANICAL AND PLUMBING
MS-ME-4,5 Replace Four 1999 Roof Top Units, Two R-22 Air-Cooled Condensing Units and Replace Three 2002-2005 Roof Top Units
• Remove existing rooftop and make-up air handling units, piping, and controls
• Provide new double wall rooftop air handling units with hot water heating and DX dehumidification
• Extended new hot water and refrigerant piping to air handling units as required
• Provide variable speed drives for the supply and relief fans
• Provide all roofing and sealing work as required
• Provide DDC controls, sequencing, and programming
• Provide all associated general construction and electrical work as required
MS-ME-4,5 Benefits
• Upgraded HVAC infrastructure
• Increased ventilation for improved indoor air quality
• Improved temperature control
• Improved occupant comfort
• Reduced maintenance
• Improved learning/work environment
CHISAGO LAKES MIDDLE SCHOOL FACILITY CONDITIONS
MECHANICAL AND PLUMBING
Replace 1968 AHU-11 and R-22 Air Cooled Condensing Unit; Replace Gym AHU-4; Demo 1958 Boys Locker Room Unit Ventilators, Replace Exhaust Fan, and Add Transfer Air from Gym; Demo 1974 Girls Locker Room AHU, Replace Exhaust Fan, and Add Transfer Air from Gym. Replace 1981 Gym AHU-2, 1958 Wood Shop AHU-5, and Demo Abandoned 1984 ACCU. Add Dehumidification to Gym AHU-2, Wood Shop AHU-5.
There are several air handling units (AHUs) and unit ventilators serving the Middle School that are becoming maintenance problems for the District. These air handlings units and unit ventilators are listed below.
• 1968 AHU-11 and mated 2002 R-22 ACCU-11 that serves the third-floor classrooms. This air handling unit currently has DX cooling but no heating coil. There are terminal hot water heating coils located downstream in the ductwork. Nexus recommends replacing AHU-11 and ACCU-11 with a new packaged rooftop air handling unit with DX dehumidification, hot water heating, and would incorporate energy recovery. Nexus also recommends leaving the existing coils and adding variable air volume slipin boxes. The slip-in VAVs would be located in the duct upstream of each terminal coil. The existing overhead ductwork system would remain. The addition of these VAV boxes would allow the space airflow to vary based on the space conditions.
• 1981 AHU-2 that serves the gym. This air handling unit currently has hot water heating and no cooling. Nexus recommends replacing this unit with a new AHU with hot water heating and DX dehumidification (Option ME8).
• 1974 AHU-4 that serves the old gym. This air handling unit currently has hot water heating and no cooling. Nexus recommends replacing this unit with a new rooftop air handling unit with hot water heating and DX dehumidification.
CHISAGO LAKES MIDDLE SCHOOL FACILITY CONDITIONS
• 1958 AHU-5 that serves the wood shop. This air handling unit currently has hot water heating and no cooling. Nexus recommends replacing this unit with a new AHU with hot water heating and DX dehumidification (Option ME-8).
• 1958 unit ventilators (Qty 2) that serve the boys locker room. These unit ventilators have hot water heating and no cooling. Nexus recommends demoing these units and adding a new exhaust fan and transfer air from the gym.
• 1974 AHU that serves the girls locker room. This air handling unit has hot water heating and no cooling. Nexus recommends demoing this unit and adding a new exhaust fan and transfer air from the gym.
The benefits of this HVAC improvement include increased system life expectancy, improved DDC scheduling, improved ventilation, increased energy savings, improved occupant comfort, and an improved learning and working environment.
CHISAGO LAKES MIDDLE SCHOOL FACILITY CONDITIONS
MECHANICAL AND PLUMBING
MS-ME-6,7,8 Replace 1968 AHU-11 and R-22 Air Cooled Condensing Unit; Replace Gym AHU-4; Demo 1958 Boys Locker Room Unit Ventilators, Replace Exhaust Fan, and Add Transfer Air from Gym; Demo 1974 Girls Locker Room AHU, Replace Exhaust Fan, and Add Transfer Air from Gym. Replace 1981 Gym AHU-2, 1958 Wood Shop AHU-5, and Demo Abandoned 1984 ACCU. Add Dehumidification to Gym AHU-2, Wood Shop AHU-5.
• Remove existing air handling units, unit ventilators, piping, and controls
• Provide new double wall rooftop and indoor air handling units with hot water heating and DX cooling
• Provide new exhaust fans and transfer air for boy’s and girl’s locker rooms
• Provide variable speed drives for the supply and relief fans
• Provide all roofing and sealing work as required
• Provide DDC controls, sequencing, and programming
• Provide all associated general construction and electrical work as required
MS-ME-6,7,8 Benefits
• Upgraded HVAC infrastructure
• Increased ventilation for improved indoor air quality
• Improved temperature control
• Improved occupant comfort
• Reduced maintenance
• Improved learning/work environment
CHISAGO LAKES MIDDLE SCHOOL FACILITY CONDITIONS
MECHANICAL AND PLUMBING
Replace Six (6) R-22 Condensing Units and Associated Coils – Condensing Units ACCU-7, 8, 9, 10, 12,14
There are currently six (6) 2002/2005 air-cooled condensing units that remain at the Middle School that are starting to corrode and deteriorate. They are also having several maintenance issues such as control failures, leaking refrigerant, motor protection failures, and condensing fan failures. These 22-yearold condensing units are still utilizing R-22 refrigerant which has become obsolete and far less efficient than today’s systems. These units are listed below:
• 2002 ACCU-7. This is a 20-ton condensing unit that is mated with air handling unit AHU-7 that serves classrooms.
• 2002 ACCU-8. This is a 16-ton condensing unit that is mated with air handling unit AHU-8 that serves classrooms.
• 2002 ACCU-9. This is a 16-ton condensing unit that is mated with air handling unit AHU-9 that serves classrooms.
• 2002 ACCU-10. This is a 13-ton condensing unit that is mated with air handling unit AHU-10 that serves classrooms.
• 2005 ACCU-12. This is an 8-ton condensing unit that is mated with air handling unit AHU-12 that serves the technology classroom.
• 2005 ACCU-14. This is a 6-ton condensing unit that is mated with air handling unit AHU-14 that serves choir.
CHISAGO LAKES MIDDLE SCHOOL FACILITY CONDITIONS
Nexus recommends replacing these old inefficient air-cooled condensing units and their mated DX cooling coils with new air-cooled condensing units and associated DX cooling coils with American Society of Heating and Refrigeration Engineer’s (ASHRAE) code compliant refrigerant that is more energy efficient and environmentally friendly. New refrigerant piping would be installed as required for the new refrigerant. Nexus also recommends demoing the abandoned 1984 ACCU.
Benefits of this cooling system upgrade include increased energy savings, reduced maintenance, improved system operation, and reduced environmental impact.
CHISAGO LAKES MIDDLE SCHOOL FACILITY CONDITIONS
MECHANICAL AND PLUMBING
MS-ME-9 Replace Six (6) R-22 Condensing Units and Associated Coils – Condensing Units ACCU-7, 8, 9, 10, 12,14
• Provide new DX cooling coils with code compliant refrigerant
• Provide new air-cooled condensing units
• Demo abandoned 1984 as part of this improvement
• Provide new refrigerant piping to air handling units as required for new refrigerant
• Provide all roofing and sealing work as required
• Provide DDC controls, sequencing, and programming
• Provide all associated general construction and electrical work as required
MS-ME-9 Benefits
• Upgraded HVAC infrastructure
• Improved temperature control
• Improved occupant comfort
• Reduced maintenance
• Improved learning/work environment
MECHANICAL AND PLUMBING
Add New Chilled Water Plant for Entire Middle School
As a secondary cooling option in lieu of the DX additions noted above, Nexus recommends the addition of an air-cooled chiller to serve the Middle School.
This chiller would be sized to serve all the rooftop and indoor air handling units in the building with some capacity for any future addition of cooling. All existing DX air handing units would be converted to chilled water except for the 2020 RTU-1 that serves gymnastics and the 2018 ACCU that serves the Chisago Lakes Education Center (CLEC). New chilled water piping mains would be installed throughout the building as required and would be sized for the potential future addition of cooling.
CHISAGO LAKES MIDDLE SCHOOL
The benefits of this HVAC improvement include increased system life expectancy, improved DDC scheduling, improved ventilation, improved occupant comfort, and an improved learning and working environment.
CHISAGO LAKES MIDDLE SCHOOL FACILITY CONDITIONS
MECHANICAL AND PLUMBING
MS-ME-10 Add New Chilled Water Plant for Entire Middle School
• Install new air-cooled chiller, pumps, and chilled water main distribution piping
• Install new chilled water-cooling coils for each air handling unit
• Install new chilled water piping to air handling units as required for cooling addition
• Provide propylene glycol, glycol fill station, and side-stream filter for the new chilled water system
• Provide all roofing and sealing work as required
• Provide DDC controls, sequencing, and programming
• Provide all associated general construction and electrical work as required
MS-ME-10 Benefits
• Upgraded cooling infrastructure
• Improved temperature control
• Improved occupant comfort
• Reduced maintenance
• Improved learning/work environment
CHISAGO LAKES MIDDLE SCHOOL FACILITY CONDITIONS
MECHANICAL AND PLUMBING
Replace 1999, 2002, and 2005 Air Handling Units
There is one (1) 1999, four (4) 2002, and one (1) 2005 air handling units serving the Chisago Lakes Middle School that are still in good shape but should be considered for replacement in ten (10) years. These units are as listed below.
• 1999 AHU-12 that serves the computer lab. This air handling unit currently has hot water heating and DX dehumidification.
• 2002 AHU-7 that serves classrooms. This air handling unit currently has hot water heating and DX dehumidification.
• 2002 AHU-8 that serves classrooms. This air handling unit currently has hot water heating and DX dehumidification.
• 2002 AHU-9 that serves classrooms. This air handling unit currently has hot water heating and DX dehumidification.
• 2002 AHU-10 that serves classrooms. This air handling unit currently has hot water heating and DX dehumidification.
• 2005 AHU-14 that serves the choir room. This air handling unit currently has hot water heating and DX dehumidification.
The new air handling units would come with code compliant filtration, heating water coils, DX dehumidification coils, access sections, and supply fans with variable speed drives (VSDs).
The benefits of this HVAC improvement include increased system life expectancy, improved DDC scheduling, improved ventilation, increased energy savings, improved occupant comfort, and an improved learning and working environment.
CHISAGO LAKES MIDDLE SCHOOL
MECHANICAL AND PLUMBING
MS-ME-11 Replace 1999, 2002, and 2005 Air Handling Units
• Remove existing air handling units, piping, and controls
• Provide new double wall indoor air handling units with hot water heating and DX dehumidification
• Provide variable speed drives for the supply and relief fans
• Provide all roofing and sealing work as required
• Provide DDC controls, sequencing, and programming
• Provide all associated general construction and electrical work as required
MS-ME-11 Benefits
• Upgraded HVAC infrastructure
• Increased ventilation for improved indoor air quality
• Improved temperature control
• Improved occupant comfort
• Reduced maintenance
• Improved learning/work environment
CHISAGO LAKES MIDDLE SCHOOL
MECHANICAL AND PLUMBING
Replace Dust Collector and Ductwork
The existing wood dust collector at the Middle School is 2005 vintage. This antiquated unit does not adequately remove dust from the woodworking spaces due to age-related wear and tear and component failure. This compromises air quality when the woodworking spaces are in use.
Nexus recommends replacement of this dust collector unit with a new modern International Mechanical Code (IMC) compliant system. New dust collection ductwork would be installed where required and routed to each piece of equipment requiring dust collection if existing ducts cannot be re-used.
This upgrade will ensure adequate dust collection in the woodworking spaces, increasing indoor air quality and providing reliable unit operation.
CHISAGO LAKES MIDDLE SCHOOL FACILITY CONDITIONS
MECHANICAL AND PLUMBING
MS-ME-12 Replace Dust Collector and Ductwork
• Demo existing dust collector and ductwork
• Provide new recirculating dust collector
• Provide new dust collecting ductwork
• Provide code required fire protection if required
• Provide all associated controls and electrical work
MS-ME-12 Benefits
• Upgraded HVAC infrastructure
• Improved indoor air quality
• Improved occupant comfort
• Reduced maintenance
• Reduced energy consumption
• Improved learning environment
• Improved Safety
CHISAGO LAKES MIDDLE SCHOOL FACILITY CONDITIONS
MECHANICAL AND PLUMBING
Exhaust Fans Replacement (Qty 20)
There are about forty (40) total inline and rooftop exhaust fans at the Middle School. Several of these exhaust fans have exceeded their recommended service life and are in need of replacement.
Nexus recommends replacing some of these fans when major work is taking place so the best pricing can be obtained from the contractors. Nexus has budgeted for the replacement of twenty (20) existing exhaust fans for the school. Nexus will work along with the district on the priority of which ones want to be replaced.
Fans will be a direct replacement to the original size/capacity but will have premium efficiency motors installed to increase energy savings. The fan size/capacity may be reduced if engineering can justify where over ventilation is occurring.
The benefits of this HVAC improvement will result in increased energy savings, improved flow and reduced maintenance for exhaust fans, and reduced leaks from seals.
CHISAGO LAKES MIDDLE SCHOOL
Add Thermal Equalizers to Multi-Purpose Gym and Gymnastics Room
The existing multi-purpose gym and gymnastics room currently suffer from temperature stratification due to the heights of these spaces. Warmer air migrates to the ceiling making it difficult to achieve proper temperature control, especially in winter.
Nexus recommends the installation of thermal equalizer destratification fans in the multi-purpose gym (Qty 4) and gymnastics room (Qty 2) to ensure proper ventilation.
Benefits of these improvements include energy savings, improved temperature control and occupant comfort.
CHISAGO LAKES MIDDLE SCHOOL
MECHANICAL AND PLUMBING
MS-ME-13 Replace Exhaust Fans (Qty 20) and Add Thermal Equalizers to Multi-Purpose Gym and Gymnastics
• Replace exhaust fans with new exhaust fans with associated ductwork
• Provide all roofing and sealing work as required
• Install thermal equalizers in multi-purpose gym and gymnastics
• Wire thermal equalizers to wall switch/controls
• Provide DDC controls, sequencing, and programming
• Provide all associated general construction and electrical work as required
MS-ME-13 Benefits
• Upgraded exhaust system infrastructure
• Improved temperature control
• Improved occupant comfort
• Reduced maintenance
• Improved work environment
CHISAGO
MECHANICAL AND PLUMBING
Add Combustion Air Venting to Existing 2018 Water Heater, Add Additional Water Heater, and Replace Domestic Hot Water Recirculation Pump that is Undersized
The existing 2018 water heater currently pulls in combustion air directly from the boiler room which can lead to efficiency, safety, and maintenance issues.
Nexus recommends directly venting the combustion air for the water heater from the outside. This improvement would enhance the efficiency, safety, and performance of the water heater while contributing to better indoor air quality.
Nexus also recommends adding a secondary water heater and replacing the undersized domestic hot water recirculation pump. The new water heater would be ultra-high efficiency, condensing-style, and sealed combustion water heater.
The benefits of this upgrade would provide energy savings, reduce maintenance, and improve the overall water heating system.
MECHANICAL AND PLUMBING
MS-ME-14 Add Combustion Air Venting to Existing 2018 Water Heater, Add Additional Water Heater, and Replace Domestic Hot Water Recirculation Pump that is Undersized
• Install new combustion air venting directly from outside for the existing 2018 water heater
• Install new ultra-high efficiency, seal combustion hot water
• Extend hot water and hot water circulation piping to new water heater connections
• Provide and install domestic hot water recirculation pump
• Provide associated general and electrical construction work as required
MS-ME-14 Benefits
• Improved occupant comfort
• Improved plumbing fixture operation
• Increased equipment life
• Reduced maintenance
CHISAGO LAKES MIDDLE SCHOOL
MECHANICAL AND PLUMBING
Replace Six (6) Non ADA Wash Fountains and 20 Flush Valves and Replace One Sump Pump that is Undersized
There are several plumbing devices that are starting to increase in maintenance/non-ADA compliant and should be replaced. See below for this equipment:
• Non-ADA Wash Fountain (Qty 6)
• Flush Valve Replacements in Toilet Rooms (Qty 20)
• Sump Pump (Qty 1)
Nexus recommends replacing these existing plumbing fixtures one for one with new ADA compliant fixtures. Plumbing piping would be modified as required for the new fixtures.
Replacing these plumbing fixtures would provide reduced water consumption, reduced maintenance, and extended life expectancy of the plumbing system.
CHISAGO LAKES MIDDLE SCHOOL
MECHANICAL AND PLUMBING
MS-ME-15 Replace Six (6) Non-ADA Wash Fountains and 20 Flush Valves and Replace One Sump Pump that is Undersized
• Demo existing wash stations, sump pump, and flush valves
• Provide and install new ADA compliant fixtures one for one
• Modify existing plumbing piping as required for new fixtures
• Provide associated general and electrical construction work as required
MS-ME-15 Benefits
• Improved occupant comfort
• Improved plumbing fixture operation
• Increased equipment life
• Reduced maintenance
CHISAGO LAKES MIDDLE SCHOOL FACILITY CONDITIONS
MECHANICAL AND PLUMBING
Replace Galvanized Piping
Some domestic water piping located in the 1935, 1959, 1968, and 1974 portions of the building is old galvanized steel. Over time, galvanized pipes are susceptible to corrosion and rust, which can lead to a buildup of mineral deposits within the piping. This corrosion process not only reduces water flow but also compromises water quality, potentially introducing harmful contaminants into the water used by students and staff. The deterioration of these pipes can lead to frequent leaks and occasional bursts, disrupting school operations and requiring costly repairs and maintenance.
Nexus recommends the replacement of the galvanized domestic water piping with insulated copper piping. Copper plumbing offers superior durability and resistance to corrosion compared to galvanized steel and does not suffer from the same accumulation of mineral deposits that can impede water flow and quality. Furthermore, copper pipes are less prone to leaks and bursts, ensuring a more reliable water supply. Importantly, copper systems do not carry the risk of leaching harmful substances like lead, providing a safer environment for students and staff and aligning with health and safety standards in educational facilities.
Benefits of this work would be reduced maintenance, improved water quality, and improved domestic hot water system.
CHISAGO LAKES MIDDLE SCHOOL FACILITY CONDITIONS
MECHANICAL AND PLUMBING
MS-ME-16 Replace Galvanized Piping
• Remove existing galvanized domestic water piping and components in 1935, 1968, and 1974 portions of the building
• Install new insulated copper domestic water piping
• Provide associated general construction work as required
MS-ME-16 Benefits
• Reduced potential for elevated lead and galvanized contaminants in water supply
• Improved drinking water quality
• Reduced maintenance
MECHANICAL AND PLUMBING
Replace Sanitary Sewer on Main Level Under Building and Sanitary Pipe Feeding Lift Station in Lower-Level CLEC
There are several issues with the sanitary lines under the main level of the 1974 building addition that route to the manhole shown in the top picture to the right. This sanitary line has corroded to the point that tree roots have started to grow through the pipe.
The sanitary line in the Lower-Level CLEC that routes from the bathroom to the sanitary lift shown in the bottom picture to the right has also started to corrode and deteriorate.
Nexus recommends sawcutting these two existing sanitary lines out and demoing them. New sanitary lines would then be installed. The portion of the santiary line going to the manhole in the top picture will be included under the Civil scope of work.
Replacing these sanitary lines would reduce maintenance and extend the life expectancy of the sanitary system.
CHISAGO LAKES MIDDLE SCHOOL
CONDITIONS
CHISAGO LAKES MIDDLE SCHOOL
MECHANICAL AND PLUMBING
MS-ME-17,18 Replace Sanitary Sewer on Main Level Under Building and Sanitary Pipe Feeding Lift Station in Lower-Level CLEC
• Saw cut and remove existing sanitary lines as required
• Install new sanitary piping
• Provide associated general construction work as required
MS-ME-17,18 Benefits
• Improved sanitary system
• Increased equipment life
• Reduced maintenance
MECHANICAL AND PLUMBING
Add Fire Protection to Building (Includes Fire Pump & Structural Bracing)
CHISAGO LAKES MIDDLE SCHOOL FACILITY CONDITIONS
The existing Chisago Lakes Middle School only has fire protection in the lower-level CLEC spaces. The rest of the building does not have a fire protection sprinkler system installed and is not protected from property loss or life safety in the event of a fire. Installing fire protection sprinklers in buildings significantly enhances safety by automatically discharging water to suppress fires upon heat detection. According to the National Fire Protection Association (NFPA), buildings equipped with sprinklers see a lower rate of firerelated injuries and property damage compared to those without, highlighting their effectiveness.
Moreover, retrofitting buildings with these systems ensures compliance with modern safety standards and can lead to lower insurance premiums due to reduced risks of fire damage. Fire sprinkler systems also require minimal maintenance, ensuring durability and consistent performance over time, making them a reliable choice for enhancing safety.
Nexus proposes installing a fire protection sprinkler system for the entire Chisago Lakes Middle School. Installation is a proactive measure to protect students, staff, and property.
CHISAGO LAKES MIDDLE SCHOOL FACILITY CONDITIONS
MECHANICAL AND PLUMBING
MS-ME-19 Add Fire Protection to Building (Includes Fire Pump & Structural Bracing)
• Install new wet-pipe fire protection system to fully protect the entire building
• Provide all required general construction work
MS-ME-19 Benefits
• Reduced damage during a fire event
• Increased occupant safety
CHISAGO LAKES MIDDLE SCHOOL FACILITY CONDITIONS
MECHANICAL AND PLUMBING
Retro-Commissioning of HVAC Equipment
Building retro-commissioning is a systematic process that ensures all buildings perform as efficiently as possible according to the owner’s operational needs as well as adjustment of HVAC equipment’s operational parameters to meet current space use.
The Building Automation System (BAS) plays a crucial role in providing a comfortable, energy-efficient environment for students, parents, and staff. Over time, damper and valve controls have gone out of proper adjustment, components fail, and controls sequences are modified and may not be programmed to provide an optimal balance between comfort, indoor air quality, and energy efficiency.
This Nexus Retro-commissioning Team will identify the root cause of HVAC equipment operational issues and will provide adjustments to the sequences and outdoor air setting to improve occupant comfort while reducing energy consumption where possible. The retro-commissioning process will also identify components that require adjustment or replacement.
Retro-commissioning activities include:
HVAC Equipment: Nexus will verify existing HVAC equipment operation and control sequences through observation. We will provide adjustment and tuning services to achieve optimal operation and improved occupant comfort. Documentation of the findings with corrections and recommendations for further improvements will be made.
Services include:
• Ventilation study to assure all spaces are ventilated per the current code requirements and the outdoor air setpoints will be adjusted up or down based on current space occupancy
• Test point commands vs actual controller output at each device for heating, cooling, and mixed air control
• Verify valve/damper operation on reheat coils and air handler coils
• Verify indicated vs actual (duct static, supply and return temperatures)
CHISAGO LAKES MIDDLE SCHOOL FACILITY CONDITIONS
• Verify mixed-air operation (damper position and economizer operation)
Valves and Dampers: Nexus will test all existing rooftop (RTU) and indoor air handling unit (AHU) sequences along with the valve and damper operation to ensure control actuators are fully operational. We observe valve/damper/actuator operation and check for any physical signs of valve/damper leakage or binding, which results in operational issues and increased energy consumption. We check discharge temperature with valves in the fully open and closed positions. In addition, we will provide unit pricing to replace any defective valves and/or actuators. Proper RTU and AHU operation provides improved occupant comfort at optimal energy efficiency.
Zone Reheat Valves: Nexus will test existing zone reheat valves for proper operation. We ensure command valves fully open and close and observe valve/actuator operation. We inspect valves for any physical signs of valve leakage or binding, check discharge temperature with valve in the fully open and closed positions and provide unit pricing to replace any defective valves and/or actuators.
Economizer: Nexus will update the control sequence for mixed-air dampers to their setpoints with economizer lockout setpoints.
Heating Water Pump Variable Speed Drives (VSDs): Nexus will lower the pressure setpoint to allow drives to modulate down to the slowest speed required to satisfy the most critical room temperature sensor.
Boilers: Nexus will optimize sequencing and staging of equipment and adjust the water reset schedules based on outside air temperature.
The action steps noted above are part of the Nexus retro-commissioning process. The benefits of this process include improved temperature control and occupant comfort, reduced energy consumption, reduced maintenance, and extended HVAC equipment life.
CHISAGO LAKES MIDDLE SCHOOL
MECHANICAL AND PLUMBING
MS-ME-20 Retro-Commissioning of HVAC Equipment
• Provide retro-commissioning of all existing HVAC systems
• Provide adjustments to existing sequences to improve HVAC system operation
• Verify operation of all dampers, actuators, valves, and terminal HVAC devices
MS-ME-20 Benefits
• Improved temperature control and occupant comfort
• Reduced energy consumption
• Reduced maintenance
• Extended HVAC equipment life
CHISAGO LAKES MIDDLE SCHOOL FACILITY CONDITIONS
ELECTRICAL, TECHNOLOGY, AND SAFETY SYSTEMS
Electrical Power Distribution Upgrades Including Switchgear and Panels in the 1958 Building
The switchboard and panels that are original to the 1958 building are now 66 years old and are at the end of their useful life. The original manufacturer of these panels no longer exists, and replacement circuit breakers are not available.
Panelboards that were installed for the 1984 and 1998 additions appear to be in good condition.
It is recommended that the 1958 electrical panels and switchboard be replaced. New panels will provide a safer electrical system since new equipment will be in compliance with current manufacturing standards for electrical equipment and will reduce maintenance costs.
The equipment recommended to be replaced includes two switchboards and 18 panelboards.
ELECTRICAL, TECHNOLOGY, AND SAFETY SYSTEMS
MS-ES-1 Electrical Power Distribution Upgrades Including Switchgear and Panels in the 1958 Building
• Replace two Switchboards
• Replace 18 Panelboards
MS-ES-1 Benefits
• Protection of and Improved Reliability of Electrical Infrastructure
• Reduced energy consumption
• Reduced maintenance
• Extended HVAC equipment life
CHISAGO LAKES MIDDLE SCHOOL FACILITY CONDITIONS
ELECTRICAL, TECHNOLOGY AND SAFETY SYSTEMS
Install New Generator to Control Primary Systems Such as Boiler, Boiler Pumps, Emergency Lighting, Coolers and Freezers (230 kW)
Currently, there is no backup power generator installed. This poses a risk for building security and life safety. In addition, costs may be incurred due to loss of heat in the building causing it to freeze up and loss of food that is stored in the coolers and freezers.
It is recommended that a generator be installed to provide backup power for these necessary items.
Increase the Size of the Generator from 230 kW to 1,000 kW to Cover Full Building Load Including Cooling
Installing a generator with full building backup will allow the school to function, even when utility power is lost. Increasing the size of the generator from 230 kW to 1,000 kW will also allow the building to be cooled.
. ELECTRICAL, TECHNOLOGY, AND SAFETY SYSTEMS
MS-ES-2.1, 2.2 Install New Generator
• Install new natural gas generator
• Install new automatic transfer switches, feeders, and electrical distribution
MS-ES-2.1, 2.2 Benefits
• Protection of and Improved Reliability of Electrical Infrastructure
• Improved safety
• Option to handle the entire building load to prevent school shutdowns
CHISAGO LAKES MIDDLE SCHOOL FACILITY CONDITIONS
ELECTRICAL, TECHNOLOGY, AND SAFETY SYSTEMS
LED Lighting Upgrade. Retrofits Kits for Fixtures in Good Condition, Replacement for Unique or Outdated Fixtures.
The existing lighting in classrooms, gymnasiums, and common areas is primarily fluorescent lamps throughout. The fixtures appear to be in fair condition; however, LED lamp technology is more energy efficient.
Replacing the fluorescent light fixtures with light fixtures that utilize LED technology will reduce overall energy use. In addition, the LED light fixtures have a life of more than 50,000 hours, which will save on lamp replacement costs reducing maintenance costs.
With LED light fixtures, dimming becomes a more viable standard. Dimmable lighting allows the users of the space to adjust the light levels as needed to enhance learning for students. Implementing dimming and occupancy sensors not only improves the functionality of the space, but it also reduces energy use.
ELECTRICAL, TECHNOLOGY, AND SAFETY SYSTEMS
MS-ES-3 LED Lighting Upgrade. Retrofit Kits for Fixtures in Good Condition, Replacement for Unique or Outdated Fixtures.
• Replace light fixtures throughout the building with LED light fixtures
• Controls to provide dimming capabilities
• Automatic shutoff of lighting
MS-ES-3 Benefits
• Reduce energy costs
• Reduce maintenance costs
• Enhance safety
CHISAGO LAKES MIDDLE SCHOOL FACILITY CONDITIONS
ELECTRICAL, TECHNOLOGY, AND SAFETY SYSTEMS
Replace Fire Alarm with a Code Compliant Voice Evacuation System
The existing fire alarm system is a Notifier system and is outdated. Current building codes require a voice evacuation fire alarm system in schools. The existing system is not capable of supporting a voice evacuation system. It is recommended that the entire fire alarm system be replaced throughout with a voice evacuation system to provide a code compliant system and better safety for staff and students.
ELECTRICAL, TECHNOLOGY, AND SAFETY SYSTEMS
MS-ES-4 Replace Fire Alarm with a Code Compliant Voice Evacuation System
• Replace existing fire alarm panel and amp
• 4 NAC panels
• Remote annunciators
• Smoke/heat and dust detectors
• Pull stations
• Monitor modules
• A/V Devices, speakers
MS-ES-4 Benefits
• Protection and improved reliability
• Improved safety
• Enhance security
CHISAGO LAKES MIDDLE SCHOOL FACILITY CONDITIONS
ELECTRICAL, TECHNOLOGY, AND SAFETY SYSTEMS
Add 10 New Security Cameras to Existing System, Upgrade Cable Serving Telephone System and Install Vape Sensors to Locker Rooms and Restrooms
Security cameras are approximately 5-6 years old. Although they still have 3-4 years left of their useful life, there are areas that need better camera coverage for better security. Add 10 new security cameras to the existing system. Replace cable serving telephone system.
With the increase in vaping among students, implementing vape sensors in restrooms and locker rooms helps to prevent vaping. It is recommended that vape sensors be installed in these problem areas.
ELECTRICAL, TECHNOLOGY, AND SAFETY SYSTEMS
MS-ES-5 Add 10 New Security Cameras to Existing System, Upgrade Cable Serving Telephone System and Install Vape Sensors to Locker Rooms and Restrooms
• Add 10 security cameras
• Add vape sensors to locker rooms and restrooms (qty 13)
• Upgrade cable serving telephone system
MS-ES-5 Benefits
• Protection and improved reliability
• Improved safety
• Enhance security
CHISAGO LAKES MIDDLE SCHOOL FACILITY CONDITIONS
ELECTRICAL, TECHNOLOGY, AND SAFETY SYSTEMS
Replace the Existing Paging System
The existing paging system is outdated and needs to be replaced. Newer systems have better intelligibility and are easier to use, making them more functional. Continual issues with the existing system also have continual maintenance costs to keep it operational.
Audio Enhancement systems for classrooms implement speakers and microphones in classrooms that enhance the learning experience for students. These systems have become the standard for new classrooms. Audio enhancement systems for classrooms have become beneficial for teachers and students to enhance the audio in the room making it easier for students to listen and understand the teacher. There are audio enhancement systems in seven classrooms. Audio enhancement should be implemented in the remaining classrooms.
It is recommended that the paging system be replaced throughout the building and audio enhancement be implemented in classrooms. The paging and audio enhancement systems can utilize the same speakers for both functions to help manage costs of replacement and implementation.
CONDITIONS
ELECTRICAL, TECHNOLOGY, AND SAFETY SYSTEMS
MS-ES-6 Replace the Existing Paging System
• Replace Paging system
• Add audio enhancement to 45 classrooms
• Add 5 corridor paging zones
• Add 178 common area speakers
• Server
MS-ES-6 Benefits
• Better zone paging
• Improved scheduling of notification bells
• Improved safety
• Enhanced learning environment
CHISAGO LAKES MIDDLE SCHOOL FACILITY CONDITIONS
ELECTRICAL, TECHNOLOGY, AND SAFETY SYSTEMS
Install Additional Outlets in Classrooms
The older areas of the building were not designed for the current need for outlets. Students need the outlets to keep the computers charged for the day. Adding more outlets will eliminate the need for extension cords used throughout the rooms.
ELECTRICAL, TECHNOLOGY, AND SAFETY SYSTEMS
MS-ES-7 Install Additional Outlets in Classrooms
• Add additional outlets where needed to average 6 per room
MS-ES-7 Benefits
• Improved charging stations
• Improved safety
CONDITIONS
ELECTRICAL, TECHNOLOGY, AND SAFETY SYSTEMS
Replace the Existing Gymnasium Sound System
The existing sound systems in the gymnasiums are 50 plus years old and are in need of replacement.
ELECTRICAL, TECHNOLOGY,
AND SAFETY
SYSTEMS
MS-ES-8 Replace the Existing Gymnasium Sound System
• Replace speakers and headend (Qty 2)
MS-ES-8 Benefits
• Improved sound
• Improved functionality
CHISAGO LAKES MIDDLE SCHOOL FACILITY CONDITIONS
ELECTRICAL, TECHNOLOGY AND SAFETY SYSTEMS
Install New Burglar Alarm Systems with 54 Motion Sensors and Two Keypads.
A burglar alarm system is also needed to enhance the security of the building. It is recommended that a burglar alarm system be installed.
ELECTRICAL, TECHNOLOGY, AND SAFETY SYSTEMS
MS-ES-9 Install New Burglar Alarm Systems with 54 Motion Sensors and Two Keypads
• Install new burglar alarm
• Install 25 motion sensors
• Install 2 keypads
MS-ES-9 Benefits
• Enhanced security
• Improved safety
CHISAGO LAKES MIDDLE SCHOOL FACILITY CONDITIONS
INTERIOR FINISHES AND ADA
High Priority Ceiling Replacement
Chisago Lakes Middle School is well maintained considering the age of the buildings. However, because of the age, there is a considerable amount of high priority interior finishes needs that should be addressed in the next 0-6 years. We have reviewed the ceilings and exposed structures to determine what has reached the end of useful life, shows stains, or is beginning to sag. The flooring from worn carpet to old VCT in corridors has been prioritized. Other areas include casework, ADA needs, and interior doors. Prioritization is based on immediate needs (0-3 years), priority 2 is from 4 to 6 years. Low priority would be those items that can be addressed in 7 to 10 years. The floor plans on the following pages indicate areas that need to be addressed based on the prioritization.
High Priority Ceilings:
High priority areas include the majority of the classrooms, corridors, and auxiliary spaces.
Low Priority Ceilings:
The new gym and a few other spaces do not need updating.
CHISAGO LAKES MIDDLE SCHOOL FACILITY CONDITIONS
Ceilings
CHISAGO LAKES MIDDLE SCHOOL FACILITY CONDITIONS
INTERIOR FINISHES AND ADA
MS-IA-1 High Priority Ceilings
• Replace ceiling as noted on the plans within the next 0-6 years
• Replace gyp board ceilings adjacent to stage
MS-IA-1 Benefits
• Extending the life of the interior materials
• Reduce maintenance cost
• Improves facility aesthetics
CHISAGO LAKES MIDDLE SCHOOL FACILITY CONDITIONS
INTERIOR FINISHES AND ADA
High Priority Flooring
The majority of the carpet and VCT on the main level should be replaced in the next six years. The VCT in the corridors should be replaced with new rubber tiles as part of District-wide standardization. The concrete floor in the music room should have carpet installed. Replace VCT flooring with a flooring material that requires less maintenance, such as an LVT.
Low Priority Flooring
A majority of the flooring on the third floor and the classrooms on the lower level were recently redone with resilient flooring and will last another six years. At that point consideration should be given to replacement.
Cafeteria
Music Room
FLOORING
CHISAGO LAKES MIDDLE SCHOOL FACILITY
CONDITIONS
CHISAGO LAKES MIDDLE SCHOOL FACILITY CONDITIONS
CHISAGO LAKES MIDDLE SCHOOL FACILITY CONDITIONS
CHISAGO LAKES MIDDLE SCHOOL FACILITY CONDITIONS
INTERIOR FINISHES AND ADA
MS-IA-2 High Priority Flooring
• Replace wood floor in wood gym
• Replace VCT in corridors with rubber tiles
• Replace VCT and resilient flooring with LVT in areas marked on the plans
• Replace worn carpet
• Install carpet in music room
MS-IA-6 Low Priority Flooring
• Replace resilient flooring with LVT
MS-IA-2 & 6 Benefits
• Extending the life of the interior materials
• Reduce maintenance cost
• Improves facility aesthetics
CHISAGO LAKES MIDDLE SCHOOL FACILITY CONDITIONS
INTERIOR FINISHES AND ADA
High Priority Casework
The casework in the majority of the classrooms is in need of updating. Wood finish is worn, cracked and missing. The casework is outdated and, in most cases, is not meeting the needs of the users. All of the identified casework should be replaced in the next 6 years.
CHISAGO LAKES MIDDLE SCHOOL FACILITY CONDITIONS
Casework
CHISAGO LAKES MIDDLE SCHOOL FACILITY CONDITIONS
CHISAGO LAKES MIDDLE SCHOOL FACILITY CONDITIONS
INTERIOR FINISHES AND ADA
MS-IA-3 High Priority Casework
• Replace casework in classrooms
MS-IA-3 Benefits
• Improved building aesthetics
• Extending the life of the interior materials
• Improved functionality of building
CHISAGO LAKES MIDDLE SCHOOL FACILITY CONDITIONS
INTERIOR FINISHES AND ADA
High Priority Wall Finishes
The majority of the walls throughout the building are in need of paint including the glazed tile in the 1959 addition. This includes all of the classrooms, corridors, stairwells, restrooms and office spaces. The walls’ finishes are in poor condition and should be painted in the next three years. This will brighten up the spaces, giving them a fresh, updated look.
CHISAGO LAKES MIDDLE SCHOOL FACILITY CONDITIONS
CHISAGO LAKES MIDDLE SCHOOL FACILITY CONDITIONS
CHISAGO LAKES MIDDLE SCHOOL FACILITY CONDITIONS
INTERIOR FINISHES AND ADA
MS-IA-4 High Priority Wall Finishes
• Paint glazed tile where indicated on plans
• Paint corridors, stairwells
• Paint classrooms
MS-IA-4 Benefits
• Improved building aesthetics
• Extending the life of the interior materials
• Improved functionality of building
CHISAGO LAKES MIDDLE SCHOOL FACILITY CONDITIONS
INTERIOR FINISHES AND ADA
High Priority Door Replacement, Hardware and Locks. Re-key all Door Locks to Comply with District-wide Schlage Standard.
The majority of the interior door hardware needs to be replaced in the next 3 years. There are also a number of doors that need replacement including the hardware. The maintenance staff is also having issues with doors no longer closing and having to try and make adjustments. All of the door locks need to be re-keyed to comply with the District-wide Schlage standard. The third-floor classrooms do not have doors, just curtains.
Doors & Hardware
CHISAGO LAKES MIDDLE SCHOOL FACILITY CONDITIONS
CHISAGO LAKES MIDDLE SCHOOL FACILITY CONDITIONS
INTERIOR FINISHES AND ADA
MS-IA-5 High Priority Door Replacement, Hardware and Locks. Re-Key all Door Locks to Comply with District-Wide Schlage Standard
• Replace locks on all doors to comply with district standard
• Replace 87 single doors and hardware
• Replace 17 double doors and hardware
MS-IA-5 Benefits
• Improved building aesthetics
• Improved acoustics
• Improved security
• Improved functionality of building
CHISAGO LAKES MIDDLE SCHOOL FACILITY CONDITIONS
INTERIOR FINISHES AND ADA
Replace Main Corridor Hallway Lockers on all 3 Floors, Paint Remaining Hallway Lockers, Replace all the Girls’ Lockers and Replace the White Lockers in Boys Locker Room
The lockers on all 3 main corridors have been damaged over time and should be replaced. The remaining lockers should be painted. In the locker rooms, all of the girls’ lockers should be replaced immediately. In the boy’s locker room the white older lockers should be replaced and the remainder painted. Refer to the casework floorplans for information on the lockers.
INTERIOR FINISHES AND ADA
MS-IA-7 Replace Main Corridor Hallway Lockers on all 3 Floors, Paint Remaining Hallway Lockers, Replace all the Girls’ Lockers and Replace the White Lockers in Boys Locker Room
• Replace lockers in main corridors
• Repair and paint the lockers in the 1999 addition
• Replace lockers in girl’s locker room
• Repair and paint lockers in boy’s locker room
• Replace white lockers in boy’s locker room
MS-IA-7 Benefits
• Improved building aesthetics
• Extending the life of the interior materials
• Improved functionality of building
CONDITIONS
INTERIOR FINISHES AND ADA
Replace Window Blinds with New Roller Shades
The window blinds throughout the building have far exceeded their useful life and are a maintenance issue. The individual strips continue to fall off and have to be reinstalled. All of the blinds should be replaced with new roller shades.
INTERIOR FINISHES AND ADA
MS-IA-8 Replace Window Blinds with New Roller Shades
• Replace all of the window blinds
MS-IA-8 Benefits
• Improved maintenance costs
• Improved control of the light levels in the classroom
The stairwells in the main building are lacking in rubber tread and code compliant handrails. New rubber treads should be installed and the risers painted. New code compliant stainless railings/handrails should be installed.
Sand & Refinish Wood Gym Floor, Skim Coat Plaster Walls with Parex ACF, Paint Ceiling and New Spiral Ductwork
The Wood Gym is in need of a refresh from the floor to the ceiling. The flooring in the Wood Gym should be sanded and refinished. The plaster walls are showing signs of damage from the balls hitting it over the years. They should be skim coated with Parex ACF. The ceiling should be painted, and new spiral ductwork installed.
INTERIOR FINISHES AND ADA
MS-IA-10 Sand & Refinish Wood Gym Floor, Skim Coat Plaster Walls with Parex ACF, Paint Ceiling and New Spiral Ductwork
• Sand and refinish the wood floor
• Skim coat the walls with Parex ACF
• Paint the ceiling
• Install new spiral ductwork
MS-IA-10 Benefits
• Improved building aesthetics
• Extending the life of the interior materials
• Improved functionality of building
CHISAGO LAKES MIDDLE SCHOOL
SITE IMPROVEMENTS
Remove and Replace the North West Drive and South Bus Drive Including the Curb and Gutter.
During the site visit it was observed that the west parking lot, north parking lot, and drive connecting the two are in need of removal and replacement. Soil borings and a topographic survey are recommended to understand the existing soils and pavement.
Areas not draining properly were observed at each of the zones needing replacement. A survey will show if simple regrading or more complex storm sewer changes are necessary to fix these issues.
As shown in the related graphic, the east parking and bus loop are in need of maintenance or partial replacement but do not need full replacement within the next few years.
The areas in greatest need of asphalt replacement are also in need of numerous sections of curb replacement. Not all curbs need replacement but a majority of them in some areas. To get a consistent finished look, consideration of replacing all curb and gutter and sidewalk may be considered. This is mainly for the north and west parking lot areas.
CHISAGO LAKES MIDDLE SCHOOL
SITE IMPROVEMENTS
MS-SI-1 Remove and Replace the North West Drive Including the Curb and Gutter
• Full removal and replacement of asphalt
• Removal and replacement of some of the curb and gutter
MS-SI-2 Remove and Replace the South Bus Drive including the Curb and Gutter
• Asphalt maintenance of south bus drive to delay a full removal and replacement
• Removal and replacement of asphalt within 8 years
• Removal and replacement of sections of failing curb and gutter
MS-SI-1, 2 Benefits
• Improved surface features and drainage patterns
• Extending the life of the parking lots
• Reduced maintenance issues
CHISAGO LAKES MIDDLE SCHOOL FACILITY CONDITIONS
SITE IMPROVEMENTS
Replace North Parking Lot and Replace Sanitary Piping Under Parking Lot
The north parking lot is in need of removal and replacement. The sanitary pipe under the north pavement area has failed and should be replaced at this time. Spot replacement of the curb and gutter along with some concrete pavement should also be addressed during the parking lot replacement.
SITE IMPROVEMENTS
MS-SI-3 Replace the North Parking Lot and Replace Sanitary Pipe Under Parking Lot
• Remove and replace problematic section of sanitary line
• Remove and replace asphalt pavement
• Fine grading/ soil correction
• Concrete pavement spot replacements
• Curb and gutter spot replacements
MS-SI-3 Benefits
• Improved surface features and drainage patterns
• Extending the life of the parking lots
• Reduced maintenance issues
CHISAGO LAKES MIDDLE SCHOOL FACILITY CONDITIONS
SITE IMPROVEMENTS
Replace West Parking Lot
The asphalt on the west parking lot is in need of removal and replacement. Soil borings and a topographic survey are recommended to understand the existing soils and pavement. The curb and gutter is in need of spot replacement.
Replace East Parking Lot
Within the next 10 years the East Parking lot should have the asphalt pavement removed and replaced, along with spot replacements of the concrete, curb, and gutter.
SITE IMPROVEMENTS
MS-SI-4 Replace West Parking Lot
• Remove and replace asphalt pavement
• Fine grading of pavement/ soil correction
• restripe
• Concrete sidewalk spot replacements
MS-SI-5 Replace East Parking Lot
• Remove and replace asphalt pavement
• Fine grading of pavement/ soil correction
• Restripe
• Concrete sidewalk spot replacements
MS-SI-4 & 5 Benefits
• Improved surface features and drainage patterns
• Extending the life of the parking lots
• Reduced maintenance issues
CHISAGO LAKES MIDDLE SCHOOL FACILITY CONDITIONS
SITE IMPROVEMENTS
Remove and Resurface the Acrylic on Tennis Courts, Restripe Courts
Resurfacing of the tennis courts is needed within the next five years. This is the regular maintenance interval for this surfacing.
Some cracking has appeared on the courts and will need to continue to be filled as they appear to prolong the system.
SITE IMPROVEMENTS
MS-SI-6
Remove and Resurface the Acrylic on Tennis Courts, Restripe Courts
• Resurface tennis courts
• Restripe
MS-SI-6 Benefits
• Improved surface features
• Improved safety
• Reduced maintenance issues
CHISAGO LAKES MIDDLE SCHOOL FACILITY CONDITIONS
CHISAGO
SITE IMPROVEMENTS
Rebuild the Retaining Wall on the North Elevation, Outside Door 16
The segmental retaining wall at the north elevation has begun to tip forward, and the lowest level is almost vertical. No geogrid was observed in the terraced retaining wall. The segmental retaining wall at the north elevation has begun to tip, and the lowest level is almost vertical. No geogrid was observed in the terraced retaining wall. The retaining wall appears to be leaning forward, likely due to some settlement of the segmental block and lateral movement of the retaining wall due to excessive soil pressure. A wall of this height and style typically requires geogrid to help resist the lateral soil pressure and provide stability. Retaining walls at the north side of the building are likely to continue to move and should be monitored. Rebuild the retaining wall system at the north elevation of the building with a new engineered terraced retaining wall.
SITE IMPROVEMENTS
MS-SI-7 Rebuild the Retaining Wall on the North Elevation, Outside Door 16
• Remove existing wall
• Install geogrid textile
• Install new engineered terraced retaining wall
MS-SI-7 Benefits
• Improved safety
• Better drainage
• Reduced maintenance issues
CHISAGO LAKES MIDDLE SCHOOL FACILITY CONDITIONS
SITE IMPROVEMENTS
Replace Embedded Handrails on Exterior Stairs
Railings at sidewalks and stairs are deteriorating and corroding at the embedded posts. Spalled concrete was observed at the corroded posts. The concrete at sidewalk railings is cracking and spalling due to the corrosion of the embedded steel railing post. As steel rusts, it increases in thickness and exerts pressure on the concrete. Sidewalks railings are corroded and will continue to deteriorate, which is typical of embedded rails. Railings should be inspected yearly for worsening conditions. Repair spalled concrete sidewalk and steps. This work should be done in the next 4-6 years.
Consideration should be given to the replacement of embedded handrails with surface mounted railings.
SITE IMPROVEMENTS
MS-SI-8 Replace Embedded Handrails on Exterior Stairs
• Remove embedded handrails
• Repair concrete
• Install surface mounted railings
MS-SI-8 Benefits
• Improved safety
• Reduced maintenance issues
EDUCATIONAL ADEQUACY
Remodel Kitchen Prep, Storage, and Office Areas (Includes New Makeup Air Unit)
The kitchen is undersized for the number of students that are being served. The average daily participation is 150 breakfast and 525 lunches over 3 lunch periods. The current student flow is from the gym, through two servery lines then back out into the gym and across to the cafeteria. There is not enough room for proper serving equipment, and it is not placed for optimal student flow. The hot food prep area is too small and expands into the meal service lines. This limits the abilities of the kitchen staff and causes disruption when serving meals. The dishroom is small, and carts of drying pans, dishes, etc. are placed in the hallway between the kitchen and maintenance. The location of storage, cooler and freezer are scattered reducing the efficiency of the prep work. The office space is located in one of the storage rooms. If the kitchen can expand into adjoining maintenance space, the servery lines can be modified allow more space for meal service and the hot food prep area can be expanded. The dishroom would be expanded, along with the dry storage area. The office could be relocated outside of the storage room.
Remodel and Expand Receiving/Dock Area (Need to Relocate Water Main)
As a result of improving the Food Service area, the existing receiving area is impacted. A building of this size and capacity commonly has a full receiving area with a loading dock. The proposal is to create a new receiving area with custodial office, workspace/shop, and building storage. Resultant site work will include relocating the water main, grading to provide for a recessed dock for truck deliveries, and creating a driveway for large trucks to access the new loading dock.
CHISAGO LAKES MIDDLE SCHOOL
EDUCATIONAL ADEQUACY
Demo Existing Fitness Area and Relocate Gymnasium North. Expand Cafeteria and Open Wall Between Two Cafeteria Spaces. New Café Flooring and Ceilings.
During lunchtime periods, one of the gymnasiums is not [fully] available as half of the gym needs to support lunch by allowing space for lunch lines for serving food as the access to the servery is through this gym. Half of the gym is used for circulation needed for stacking of lines as well as accessing the cafeteria. The proposed solution would shift the gym to the east by relocating the fitness room. The cafeteria would then expand where a portion of the former gym existed to create a contiguous cafeteria space that has immediate adjacency to the serving lines and access to dish drop/dishwash. This space would also act as multi-purpose space when it is not lunch time and provide a ‘lobby’ space to support larger gatherings/assemblies that would occur in the gymnasium. The renovations would increase sightlines from the existing cafeteria space to the new eating area, as well as allow a gym with a full regulation court to be accessible for physical education classes during lunch periods to accommodate scheduling needs.
Divide Large Boys Locker Room to Create New Fitness Space w/Windows to Gym. Relocate Equipment, Private Showers for Both Locker Rooms and Update Restrooms. New PE Offices.
The existing boys and girls Phy Ed locker rooms are underutilized and in disrepair. Additionally, in their current state, they do not comply with ADA, are difficult areas to supervise, and lack the proper amenities that students need. The proposal would include a complete renovation of finishes, replacing lockers to be right-sized in terms of both quantity and size, updating the toilets and showers to meet ADA as well as align with desired plumbing counts of each, There would also be private changing and shower rooms. Both locker rooms would be renovated to have equitable finishes and features. Additional scope includes creating new Phy Ed offices and consolidating some athletic storage.
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CHISAGO LAKES MIDDLE SCHOOL
EDUCATIONAL ADEQUACY
Since a portion of the boys locker room is no longer utilized, this brings the opportunity to renovate the space to increase utilization. The renovation includes repurposing the former locker room into a fitness area. Windows would be installed between the new fitness area and the gym, which would allow for another Phy Ed teaching space as well as providing supervision of the fitness space.
Create (2) Groups of Private Restrooms
Both the 3rd floor student toilets and the toilets near the gym do not meet ADA requirements, have sightline issues, have finishes and fixtures past their useful life, and do not maximize the use of space. At these two locations, the restrooms would be remodeled into multiple single-occupant toilet rooms. Each single-occupancy bathroom features full height walls and doors similar to those of a single user restroom design. This design also includes proper lighting, ventilation, and finishes to align with applicable building codes. Hand washing would remain supervisable as it would be located near the hallway, often with partial height walls. While this benefits privacy efforts, it also can increase overall efficiency of use as less lines/congestion can accumulate.
Completely Renovate 3rd Floor to Enclose Classrooms (Must Include Fire Sprinklers)
The upper level of this building was originally designed as an “open concept”. In order to provide classrooms with a similar security and acoustics to the other classrooms on the lower level and main level, doors at each classroom would be needed. New permanent walls up to the ceiling deck would also be installed. There would be a reduction in student lockers to provide ADA clearances required at each door. This also requires replacement of the mechanical system as the existing system currently operates with an open air return. This work would include all finishes to be replaced/updated as well.
CHISAGO LAKES MIDDLE SCHOOL
EDUCATIONAL ADEQUACY
Relocate Main Office to Art Area in West End, Relocate Art and Reconfigure Student Services Office. Add Door for Flex Room and Finish Wall.
Not having direct visibility, supervision and control of the front doors can be a major security deficiency. The existing main entry is divorced from the front office and instead a ‘video doorbell’ is used to communicate between a visitor and unlocking a door. However, this approach doesn’t allow full screening of a person before they are granted access to the school. All other schools within the District have a secure vestibule with immediate access to the school office. In order to enhance security, as well as creating a customer service focused interaction with visitors, the office and the entry must be relocated. It is proposed to relocate the office and main entry to be closer to parking as well, thus creating a more accessible route to the front door. This would be achieved by reallocating the existing Art Room and an underutilized Media work/storage rooms to become the main office with Reception, Principal, Assistant Principal, Flexible Office, conference room, and Nurse. The existing vestibule will be modified to have electrified hardware to support a secure entry. The “work room” will be placed across the hall from the main office by repurposing a storage room. The existing office and nurse will then be remodeled to be a student support center as it will be centrally located in the school to optimize access for students. The remainder will be renovated to be an Art room and contain amenities to support Art functions. Exterior improvements will include a new canopy and signage to elevate the presence of this existing access to better identify it as the new “Main Entry”.
Create (5) Small Group Breakout Areas. Glass Wall, Furniture, Technology
In the evolving world of education, there is more of a need today for student work to be supported by individualized work/ instruction or small group work. The building is deficient in these spaces as they were not needed at the time the middle school was constructed. Small group rooms should be provided where they are easily accessible to staff and students, as such 1-2 are being provided per floor/per grade.
Curriculum has evolved in “Industrial Tech” since the last time the Wood Shop and Tech Lab were renovated almost 30 years ago. The Computer Tech Lab will get new furniture and a refresh to remove the former “PLTW” furniture and configuration to support the teacher being able to supervise students monitors/work as well as allow students to more easily view the teacher’s demonstration monitor. Furthermore, creating a formal circulation path to the Computer Tech Room instead of walking through a Wood Shop would be created to help control dust and improve wayfinding for students.
New Flexible Classroom Furniture, Instrument & Sheet Music Storage, and Band Chairs
Most classrooms have outdated furniture or do not have sufficient flexible furniture available that will attract students to those areas. Comfortable and inviting furniture has been studied to be as important to the spaces as the lighting, HVAC, and spaces themselves.
The instrument and music storage systems are past their useful life and need replacement with new systems that will align with the programs actual instrument and sheet music quantities. Band chairs will be replaced with furniture that is suitable for these programs.
