HomeMy WebLinkAbout042820 2020 French Hospital Parking Garage andPO Box 2934 . Prescott, AZ . 86302 . 805-680-1586 . steveoeg57@gmail.com
OEG 18 1102
April 28,2020
Mr.Brian Starr
Studio Design Group Architects
762 Higuera Street,Suite 212
San Luis Obispo,CA 93401
Subject:French Hospital Update Trip Generation and Parking
2020 Land Use,Parking Garage Location and Off Site Staff Parking
Dear Mr.Starr:
Orosz Engineering Group,Inc.OEG)is pleased to provide you with this letter report to assist in the
evaluation of the potential traffic impacts that could be associated with the planned 2020 land use
modifications to the French Hospital Campus.Based on our experience with previous campus planning
efforts,we have the background to complete the most recent request for an update to the 1993 Master
Plan.
In 2019,the location of the future parking garage was moved from near the Ella Street access to the
western side of the French Hospital Campus.In 2020,French Hospital negotiated an off site employee
parking area at the Renovate Church located 2075 Johnson Avenue,approximately 600 feet from
entrance to the hospital.Parking for at least 85 vehicles could be as high as 105 spaces)is available at
this off site location.Based on the proposed location of the Parking Garage and off site employee
parking area,the potential traffic impacts to Ella Street and the Ella Street intersection at Johnson Drive
will be reduced.
2020 UPDATE TO THE FRENCH HOSPITAL 1993 MASTER PLAN
Over time,the needs of the hospital have changed.In 2018,the need for increased Hospital functions
are greater than the medical office building functions previously considered in the 1993 Master Plan.A
summary and contrast between the functional uses assumed in the 1993 Master Plan with the current
2020 Update is presented in Table 1.
To determine the potential traffic related impacts that could be associated with the implementation of
the 2020 Master Plan Update functions,the trip generation of both masterplan functional uses was
prepared.As seen in Table 2 for the 1993 Master Plan,a total of 2,184 Daily ADT)trips were estimated.
During the peak hours,the 1993 Master Plan could have generated a total of 210 AM Peak Hour Trips
and 230 PM Peak Hour Trips.
Similarly,for the 2020 Master Plan Update functions,the trip generation was estimated.For the trip
generation estimates,the latest ITE Trip Generation rates were used,10th Edition.The summary of the
2020 Master Plan Update trip generation is found in Table 3.A total of 2,273 Daily ADT)trips were
estimated.During the peak hours,the 2020 Master Plan Update is estimated to generate a total of 204
AM Peak Hour Trips and 219 PM Peak Hour Trips.
Mr.Brian Starr
April 28,2020
Page 2
PO Box 2934 . Prescott, AZ . 86302 . 805-680-1586 . steveoeg57@gmail.com
Table 1
Land Use Comparison 1993 and 2020 French Hospital Master Plans
Use Size 1993 Plan 2019 Plan
Hospital SF 83,000 87,850
Hospital OR Expansion SF 9,500
General Single Tenant Offices SF 35,000 17,742
Hospital Office SF 7,800 1,800
Medical Arts Building SF 30,000
Hospital ER Expansion SF 8,669
Hospital Expansion SF 6,000 89,775
Hospital Chapel SF 1,000
Hospital Lab/Pharmacy SF 4,300
Total 171,300 213,136
Total Hospital Uses SF 106,300 193,394
Single Tenant Offices SF 35,000 17,742
Medical Arts Building SF 30,000
Total SF 171,300 213,136
TRIP GENERATION SUMMARY
Based on this trip generation comparison,the 2019 Master Plan Update functions would generate 89
more Daily ADT)trips than the 1993 Master Plan.During the peak hours,the current update to the
master plan would generate 6 fewer AM Peak Hour Trips and 11 fewer PM Peak Hour Trips.
This analysis has shown that the potential traffic impacts associated with the 2020 Master Plan Update
would result in fewer trips being generated than the 1993 Master Plan during the key PM peak hour and
would not significantly impact the existing roadway conditions over than that previously analyzed.
WESTERN PARKING GARAGE LOCATION IMPACTS
As shown in the 2020 site plan,the parking garage is proposed to be located in the southwestern corner
of the French Hospital Campus and there are at least 85 off site parking spaces on Johnson Drive east of
the Campus.For traffic oriented to Johnson Drive,traffic oriented to French Hospital would have
approximately 75%fewer trips oriented to Ella Street to get access to Johnson Drive than previously
analyzed,as the proposed parking garage has a direct drive aisle connection to Johnson Drive
immediately to the north.