HomeMy WebLinkAboutCUP-12-016 MERIDIAN HIGH SCHOOL PHASE 2BTO:
ATTN:
ADDRESS:
RE:
City of Meridian
Denny Cline
33 E. Broadway Ave. Suite 102
Meridian, ld83642
Meridian High Schoo! Phase 2B
DATE:
JOB #:
FROM:
-r
TRANSMITTAL
s/1.6/201.4
L2-O16
Todd Arnold
ENGINEERING
Transmitted By
coPtEs DATE PAGES DESCRIPTION
2 5.1,6.1,4 11
1 Comment response log
1. City redlined construction plans
X Hana Delivery
! submittal Exchange
E vrail
! Electronic Transfer
flrax
! nict-up
Transmittal Purpose
I ror Your Use
flAs Requested
I for Review & Approval
! other:
! for Signature
Remarks
CC: Signed: Todd Arnold, E.t.T., Project Engineer
lf enclosures are not as indicated, please notify us as soon as possible
9233 WEST STATE STREET I BO|SE, tD 83714 208.639.6939 | FAX 208.639.6930 | www.kmengilp.com
Please find attached:
Revised Construction Pla ns
ENGINEERING
9233 WEST STATE STREET I BOTSE, tD 837!4 | 208.639.6939 | FAX 208.639.6930
REVIEW COMMENTAND RESPONSE LOG
Date:
May 15, 2014
Project Manager:
Kevin McCarthy
Client/Owner:
Hummel Architects
Project Title and Location:
Meridian High School Phase 28
Type of Review:
City of Meridian
No. Section/
Item
Review Comment KM Engineering Response
Review comments from :Denny Cline
5
General Plan
Design
Standard Cit of Meridian general, roadway,
water, sewer and pressure irrigation notes
appear on the plans first and are in the correct
numerical order. Add any extra noted after
City of Meridian standard notes.
City of Meridian notes added to sheet C1.0
8
Return two (2) copies of the revised plan sets
with the redlines for review and/or approval.
Unbound or uncollated revised plans will not
be accepted.
Noted.
9
General Water
Design
Show and identify existing water main
alignment and size, meters, valves, blowoffs
and hydrants. Verify that they match existing
facilities and that they have been field verified.
Reduced the size of 10" proposed water main to 8"
10
General Water
Design
Additional fire hydrants are required. ln all
cases spacing shall not exceed 400' , or as
specified by the Fire Department. lf a Fire
Department Connection (FDC) is required, a
fire hydrant shall be located a maximum of
100'from the FDC and minimum of 40'from
the building.
Fire hydrant relocated on sheet C2.1.
Added FDC location shown on sheet C2.1
85
Provide a 20' easement for all public
water/sewer main outside of public right-of-
way (include all water services through the
meter and fire hydrants).
Sheet C1.3 added to plan set. I feel more discussion is
needed about easement dedication. As you can see
from sheet, past construction has moved some of water
Prepared For:
HummelArchitects and
the City of Meridian
ENGINEERING
Engineers . Surveyors . Planners
Project No: 1,2-016
Meridian High School
Phase 28
Meridian,ldaho
Storm Drainage Report
Prepared By:
Kevin McCarthy, P.E.
Principal Engineer
KM Engineering, LLP
9233 West State Street
Boise, lD 837L4
208.539.6939
kevin@kmengllp.com
April3,2O1.4
1 0821
7 I
of
TABLE OF CONTENTS
PROJECT DESCR|PTION..... ...........1
2
SCOPE AND METHODS......... 7
TOPOGRAPHY...
OFFSITE DRAINAGE ............... 3
ON.SITE DRAINAGE.........
CALCULATIONS
PROJECT DESCRIPTION
This project is a remodel and addition to the existing Meridian High School in Meridian,
ldaho. The proposed improvements to the site are to continue existing drainage
patterns in the asphalt parking area. we are also going to install an infiltration
bed to
provide additional drainage volume and treatment for the storm water generated by the
building add ition.
This report will examine the post-project scenario and demonstrate that stormwater
management complies with the requirements of the City of Meridian as well as the
water quality requirements of the ldaho Department of Environmental euality (DEe).
Post-project on-site storm water runoff will be managed with a primary conveyance
system sheet flowing to roof downspouts where it is routed to the underground
infiltration system.
SCOPE AND METHODS
This report will analyze the post-developed condition usin8 the rational and modified
rational methods to determine the volume of runoff that will be generated. This volume
of runoff will then be used to ensure sufficient storage capacity in the design of the
stormwater facilities.
TIME OF CONCENTRATION
Time of concentration influences the configuration of the runoff hydrograph.
Developing (urbanizing) a watershed usually decreases the tc and increases the peak
discharge rate. The time of concentration (t.) is defined as the time for runoff to travel
from the hydraulically most distant point on the watershed to the point in
question. This
definition was used in developing the peak flows for sizing and determining capacity of
the storm drainage facilities.
The time of concentration was determined for storm water traveling from the roof to
the infiltration system. The time of concentration was less than 10 min. Therefore, the
minimum time of concentration of 10 minutes was used per standard design practices.
DESIGN STORMS
The capacity of the storm drain facility was calculated using the 100-year design storm
and the modified rational method hydrograph. The duration of the storm was taken as
1-hour. The 100-year, 24-hour storm event was implemented through the use of
lntensity-Duration-Freq uency (lDF) curves Zone A, provided by
the ldaho Transportation
Department.
Page l1
POST-D EVELOPED RUNOFF
The Rational Method was used to calculate the post-project peak runoff rates (ep) using
the 100-year storms (see attached calculations). This method utilizes the area of the
drainage basin, the rainfall intensity of a given design storm at the time of
concentration, and a runoff coefficient that represents the land use type.
Q=CiA
Q = Peak runoff (cfs)
C = Land use Coefficient
i = Rainfall intensity (in/hr), for
a storm with time of concentration of j.omin
A = Basin area (Acres)
The Modified Rational Method was used to compute the required storage volume for
the 100-year design storm. The duration of the storm, T, was taken as L-hour. Storm
durations of shorter length were also checked to make sure the largest volume was
accounted for. The equation below represents the area of the trapezoid formed by the
modified rational method hydrograph.
V = (T-
tc)*Q,+( tc *
Q,)/2+(1.5* t. *
Q,)/2
V = Volume of runoff
(C.F.)
T = duration of storm
EXISTING CONDITIONS
TOPOGRAPHY
The general topography of the site is relatively flat to gently sloping. The existing area
where the building addition is to occur is landscaped where the storm water percolates
into the ground.
CLIMATE
The climate is typical of a river basin in a semi-arid region. The annual average
precipitation for the region is around 11 inches per year. Temperatures vary throughout
the year on average from 20-90o F. The majority of precipitation falls during the winter
and early spring months.
Page l2
POST.PROJECT DRAINAGE
OFFSITE DRAINAGE
No runoff from the bordering properties will discharge to the public right-of-way.
ON-SITE DRAINAGE
The project has one drainage basin, or area, that is defined by a low point within the
construction plans.
PEAK FLOW CALCUUTIONS
The drainage basin utilizes the Rational Method to calculate the post-project peak storm
water runoff rates (Or) using the 100-year storms. See the attached calculations. The
peak flow calculations are controlled by the impervious areas, which have a time of
concentration less than 5 minutes. Therefore, the minimum time of concentration is 10
minutes.
STORAGE CALCULATIANS
The required capacity of the infiltration bed was calculated using the 100-year design
storm and the modified rational method hydrograph. The duration of the storm was
taken as l-hour.
SUMMARY
This report utilized the rational and modified rational methods to show that the stormwater
facilities have sufficient capacity to store the post-developed on-site storm runoff. Storm
water wlll be pre-treated with a sand and grease trap and final treatment through a sand
filter in the infiltration bed.
Page l3
SEEPAGE BED CALCULATIONS
Project No,:
Proiect Description:
L2-OL6
Meridian High School
Date: April 3,2013
VOLUME CALCULATIONS
Runoff Event Frequency:
METHOD: WATER QUALITY VOLUME (Per Previous Calculation)
VOTUME TO BE RETAINED =
100 year
4,632 ft3
Seepage Bed Design
Storm Tech SC-740 Chamber
Rows 5.0
Chamber per Row 13.0
Depth 3.5
width 25.3
Length 92.5
ft
ft
ft
ft3
INFITTRATION:
100% lnfiltration is 48 hours
volume to be infiltrated:
lnfiltration Rate
lnfiltration Area
Time to infiltrate:
TotalVolume 4868.5
4632.2
8
647 .6
70.7
oK, vP > vR
ft3
in/hr
ft2
hr OK, < 48 hours
km ENEINEEEIC Page 2
E IDIAN Land Development Services
Meridian City Hall, Suite 102
33 E. Broadway Avenue
Meridian, Idaho 83642
IDAHO
Community Development
Department
LETTER OF TRANSMITTAL
Date 4128174
To: Kevin McCarthy
KM Engineering
From: Denny Cline
Development Analyst ll
Subject: Meridian High School Phase 28
Enclosed are the following:
Remarks:
Please address the redline comments and checklist
Please return the redlined plan set and two sets of the revised plans for review and/or
approval.
Thank you.
COPIES DATE
DESCRIPTION
L 4/3/1.4 Meridian High School Phase 2B Redlines - Review #l-
L Two existing water easements.(that need to be vacated)
L vP diled Sfo,td4rd NoTzs,
Ph: 208.887.2277 www. merid ia ncity.oro Fax 208.887.7297
Rev:01/2013
IDIA Building Services
Meridian City Hall, Suite 102
33 E. Broadway Avenue
Meridian, idaho 83642
IDAHO
Community Development
Deportment
Fire Code Plan Review
Plan Reviewer JC Consultants - Consultants for City of Meridian
Contract Fire lnspection/Plan Review
Rick Jackson, Contract Fire lnspector
Ce I I : 208.84 1,.0I9 4 / rjackso n @ me rid ia ncity.o rg
Date of Review April 16,20L4
Project Name and Address MHS - Classroom Addition
- Phase 2B
1900 W. Pine Ave.
Project Description One-story classroom addition at the SE corner of the
existing cafeteria
Permit Number c-ADD-2014-0001
Design Professional Clint Sievers
Applicable Building Codes 2012 tBC, 2012 tFC, 2009 tMC, 2008 NEC, 2009 tSpC,
2009 |FGC, 2013 NFPA 13,20!3 NFPA 72, 2009 ANS|-
A1-!7.1. (Usable and Accessible Buildings)and local
amendments from Meridian City Code Title 10 (Building
Regulations) (2012lFC Appendixes A, B,C, D, E, F, G, H
and I are all mandatory as adopted by local ordinance)
Construction Type il-B
Total Square Footage 10,511sf
Occu pa ncy Classification E
Occupant Load 394
Exits Required and Provided 3 Exits Required - Provided
Fire Sprinklers Required - Full NFPA 13 System
Fire Alarm Requirements Voice Evacuation Notification Required
Fire Flow Requirements 1,500 gpm - 1 New Hydrant Provided
E a.pfnOVED AS SUBMITTED (See Plan Review Comments and Conditions, page 2)
I RESUBMITTAL REQUIRED (Major Changes). If checked, please submit (2)hard,copies of
the
requested sheets and (1) CD-ROM to attention of Rick Jackson, 33 E Broadway Ave, Ste 102, Meridian, ID
83642.
Sheets Required for Resubmittal
X RESUBMITTAL NOT REQUIRED (Minor Changes). If checked, field compliance will be verified
by inspection design/build. Hardcopy resubmittals are not required. See fire code review comments below
for action items and general comments.
I. STANDARD PLAN REVIEW COMMENTS AND CONDITIONS
Ph: 20B.BB7 .2211 lFox 2OB.BB7 .1297 r www.meridioncitv.oro .
Fire Code Plan Review
lnspection Line 208.887.1 I 55
1
1) The approved plans and inspection records shall be on site for ALL inspections.
2l Final approval of the project and Certificate of Occupancy will be provided after the completion of
all final inspections.
4l The approval of this plan does not relieve the applicant from responsibility to comply with all
applicable codes and ordinances.
II. SPECIFIC PLAN REVIEW COMMENTS AND CONDITIONS
Fire Flow and Fire rant Information:
1. The minimum required fire flow is 1,500 gallons per minute with a 20-pound residual pressure
for two hours. The Development Services Analyst will verify the available fire flow. (IFC
2012 section 507 & appendix B)
2. The location of the new hydrant is approved. The FDC shall be located within 100 feet of the
new hydrant. (20|2IFC Section 507.5.1.1; Appendix C and Local Amendments to the 2012IFC)
3. The fire hydrant on site shall have a minimum of 18 inches from grade to the center of all outlets.
Fire hydrants shall be installed in accordance with 2012IFC 507 and 2013 NFPA-24.
4. A 3 foot clear space shall be maintained around the circumference of the new hydrant. This
includes any vegetation shown on the landscape plans that have been approved by the Planning
Division. Verified by the field inspector. (2012IFC 507.5.5)
Action Items and General Comments:
1. Deferred Submittals: Provide one set of plans and specifications for the f,rre alarm system in
accordance with the 2012IFC 907.1to provide voice evacuation throughout the building; fire
sprinkler monitoring and monitoring of any required HVAC detectors. There shall be an exterior
strobe at the FDC. Add one manual pull station at the fire sprinkler riser room exit. Approval of
the fire alarm system will be provided after review of the shop drawings and specifications. The
design and installation shall be in accordance with the 2012 IFC 901 and 20 1 3 NFPA-72 -
National Fire Alarm and Signaling Code. Prior to commencing the installation of the fire alarm
system, a permit shall be obtained from the Meridian Building Department. The permit fee is
$4.25 per device with a minimum fee of $150.00. The shop drawings shall contain all the
information noted in 2013 NFPA 72 - Chapter 7 . (2012 IFC 90 1 .2)
P h: 2OB.BB7 .221 1 I F ox 20B.BB7 .1 297
Fire Code Plan Review
2
vwwv. merid io n city. org lnspection Line 20B.BB7.l I 55
3) Occupancy of this space shall not take place until all inspections have been completed and a
CERTIFICATE OF OCCUPANCY is issued.
2. Deferred Submittals: Provide two sets of plans and specifications for the automatic sprinkler
system and submit them to the Meridian Building Department. All work, including the
underground supply main for the sprinkler system shall be conducted by a contractor licensed by
the Idaho State Fire Marshal's Office. The installation shall meet the applicable requirements
including but not limited to 2012IFC Section 903 and NFPA- 13 2013 - Sprinkler Systems
(IDAPA - 18 Chapter 49). Prior to commencing any work on any of the system, a permit shall
be obtained from the Meridian Building Department. The permit fee is $4.25 per head with a
minimum fee of $150.00. The shop drawings shall contain all the information noted in 2013
NFPA 13 - Chapter 23. (2012IFC 901.2)
3. Provide locking Knox caps for fire department connection. (Meridian City Code -
Title 10
Chapter 4 Section 903.3.8)
4. Provide permanent signs on doors 011 and 0118 stating: Fire Alarm Control Panel - Roof
Access - Electrical
Panels.
5. Recommend a surface mount heater in the fire sprinkler room as it is installed on a one-hour
rated wall.
6. Rotate the exit sign at exit door Hl01C so it is visible from the east end of hallway 101
7. Provide fire extinguishers with a minimum rating of 2A-10BC. They shall have a current service
tag from a fire extinguisher company and installed in accessible and visible locations. Mount
them at a maximum height of 48 inches above the floor to the top of the handle of the hre
extinguisher. Travel distance not to exceed 75'. (2012IFC 906.1 - 906.9)
8. The contractor shall be responsible for applicable requirements of the 2012IFC Chapter 33: Fire
Safety During Construction and Demolition.
9. Final approval of the project will be provided after the completion of all inspections and testing
(2012IFC 105 and 106)
10. The "Construction Inspection Record" shall remain on-site at all times
1 1 . Contact the Meridian Building Department at 887-1155 to schedule all inspections. (2012
rF'c 106.2.1)
12. This review is limited to the information submitted on the plans. Construction documents
approved by the fire code official are approved with that such construction documents comply in
all respects with this code. Review and approval by the fire code official shall not relieve the
applicant of the responsibility of compliance with this code. (2012IFC 105.4.4)
* *Ary questions or responses can be directed to rjackson@meridiancit_y.org at
887 -2211**
Ph: 208.887 .2211 lFox 2OB.BB7 .1297
Fire Code Plan Review
www. meridio ncilv.orq lnspection Line 20B.BB7.l I 55
a
a
E IDIAN Building Services
Meridian City Hall, Suite 102
33 E, Broadway Avenue
Meridian, Idaho 83642
Community Development '*AHO
Deportment
Fire Code Plan Review
Plan Reviewer JC Consultants - Consultants for City of Meridian
Contract Fire lnspection/Plan Review
Rick Jackson, Contract Fire lnspector
Ce I I : 208.84 1,.O1,9 4 / rja ckso n @ me rid ia n city.o rg
Date of Review April L6,20L4
Project Name and Address MHS Phase 34 - Classroom Remodel
1900 W. Pine Ave.
Project Description Phase 34 Remodel
Permit Number c-Tt-2014-0045
Design Professional Clint Sievers
Applicable Building Codes Original Submittal usine 2009 IFC
20L2 tBC, 20L2 tFC, 2009 tMC, 2008 NEC, 2009 tSpC,
2009 |FGC, 2013 NFPA 13,2013 NFPA 72, 2009 ANS|-
A1.17.1. (Usable and Accessible Buildings)and local
amendments from Meridian City Code Title 10 (Building
Regulations) (2012lFC Appendixes A, B,C, D, E, F, G, H
and I are all mandatory as adopted by local ordinance)
Construction Type il-B
Total Square Footage 16,400 sf
Occupa ncy Classification E
Occupant Load 537
Exits Required and Provided No Change
Fire Sprinklers Required - Full NFPA 13 System
Fire Alarm Requirements Full Notification Required
E AppnOVED AS SUBMITTED (See Plan Review Comments and Conditions, page 2)
E RESUBMITTAL REQUIRED (Major Changes). If checked, please submit (2)hardcopies of the
requested sheets and (1) CD-ROM to attention of Rick Jackson, 33 E Broadway Ave, Ste 102, Meridian, ID
83642.
Sheets Required for Resubmittal
X RE,SUBMITTAL NOT REQUIRED (Minor Changes). If checked, field compliance will be verihed
by inspection design/build. Hardcopy resubmittals are not required. See hre code review comments below
for action items and general comments.
I. STANDARD PLAN REVIEW COMMENTS AND CONDITIONS
Ph: 2OB.BB7 .2211 lFox 2OB.BB7 .1297
Fire Code Plan Review
www.meridio ncity.oro lnspection Line 208.887.1 155
1
1) The approved plans and inspection records shall be on site for ALL inspections
2l Final approval of the project and Certificate of Occupancy will be provided after the completion of
all final inspections.
4l The approval of this plan does not relieve the applicant from responsibility to comply with all
applicable codes and ordinances.
II. SPECIFIC PLAN REVIEW COMMENTS AND CONDITIONS
1. Deferred Submittals: Provide one set of plans and specifications for the fire alarm system in
accordance with the 2012IFC 907.1 to provide notification throughout; monitoring of HVAC
detectors; manual pull boxes with covers and fire sprinkler monitoring. (The fire alarm control
panel was replaced during the first phase and is located in the fire sprinkler riser room. A power
supply was added on the second floor in the electrical room.) Approval of the fire alarm system
will be provided after review of the shop drawings and specifications. The design and
installation shall be in accordance with the 20|2IFC 907 and 2013 NFPA-72 -
National Fire
Alarm and Signaling Code. Prior to commencing the installation of the fire alarm system, a
permit shall be obtained from the Meridian Building Department. The permit fee is $4.25 per
device with a minimum fee of $150.00. The shop drawings shall contain all the information
noted in2013 NFPA 72 - Chapter 7. (20I2IFC 901.2)
2. Duct detectors shall have the sampling tubes installed to the manufacturer's installation criteria.
Field inspector will verifu -
provide access to the detector and sampling tube.
3. Deferred Submittals: Provide two sets of plans and specifications for the automatic sprinkler
system and submit them to the Meridian Building Department to continue the fire sprinkler
system into this area. All work to the fire sprinkler system shall be conducted by a contractor
licensed by the Idaho State Fire Marshal's Office. The installation shall meet the applicable
requirements including but not limited to 20|2IFC Section 903 and NFPA- 13 2013 - Sprinkler
Systems (IDAPA - 18 Chapter 49). Prior to commencing any work on any of the system, a
permit shall be obtained from the Meridian Building Department. The permit fee is $4.25 per
head with a minimum fee of $150.00. The shop drawings shall contain all the information noted
in20l3 NFPA 13 - Chapter 23. (2012IFC 901.2)
4. The electrical room doors shall be permanently identified with signs having at least two-inch
letters. (2012IFC 102.8 and 605.3.1)
P h: 208.887 .221 1 / F ox 2OB.BB7 .1 297
Fire Code Plan Review
www.meridioncity.org lnspection Line 208.887.1 155
2
3) Occupancy of this space shall not take place until all inspections have been completed and a
CERTIFICATE OF OCCUPANCY is issued.
Action Items and General Comments:
a
5. Provide fire extinguishers with a minimum rating of 2A-1OBC. They shall have a current service
tag from a fire extinguisher company and installed in accessible and visible locations. Mount the
fire extinguisher at a maximum height of 48 inches above the floor to the top of the handle of the
fire extinguisher. Travel distance not to exceed 75'. (2012IFC 906.1 -906.9)
6. The contractor shall be responsible for applicable requirements of the 2012IFC Chapter 33: Fire
Safety During Construction and Demolition.
7. Final approval of the project will be provided after the completion of all inspections and testing
(2012IFC 105 and i06)
8. The "Construction Inspection Record" shall remain on-site at all times.
9. Contact the Meridian Building Department at 887-1155 to schedule all inspections. (2012
rFC 106.2.1)
10. This review is limited to the information submitted on the plans. Construction documents
approved by the fire code official are approved with that such construction documents comply in
all respects with this code. Review and approval by the fire code official shall not relieve the
applicant of the responsibility of compliance with this code. (2012LFC 105.4.4)
**Any questions or responses can be directed to rjackson@meridiancity.org at887-2211**
Ph: 2OB.BB7 .221 1 I Fox 2OB.BB7 .1297
Fire Code Plan Review
vwwv. meridio n citv. org lnspection Line 20B.BB/.1 155
)
t
main out of existing easement. Resubmitted showing
the easement being rededicated in the location shown,
as directed by the City of Meridian so not to hold up
QLPE review and permit issuance.
ENGINEERS I SURVEYORS I PLANNERS
www.kmengllp.com