RRR_Addendum_AEG-SignedADDENDUM FOR
ROCKING R RANCH DEVELOPMENT
Project No. 21029
March 2022
By
Eagle Rock Engineering and Land Surveying
For
The City of Ammon
Prepare by
Angel E. Gonzalez, P.E., M.Eng. Date
March 15, 2022
Rocking R Ranch
Addendum – March 2022
Eagle Rock Engineering and Land Surveying 1
INTRODUCTION
The purpose of this addendum is to provide additional traffic impact information
regarding commercial land use (LC/PB) at the Rocking R Ranch (RRR)
development. The initial report dated June 2021 presented findings for only
residential dwellings.
SITE LOCATION AND LAND USE
RRR is located at E Sunnyside Rd and S 45th E. Figure 1 shows the northern area in
blue is for the residential dwellings, and the southern area in orange is for
commercial use. There will be 53 new residential dwellings and an assumed
3,000sqft medical/dental office for the commercial area.
Figure 1: Rocking R Ranch Location and Land Use
Rocking R Ranch
Addendum – March 2022
Eagle Rock Engineering and Land Surveying 2
PREVIOUS TRAFFIC IMPACT STUDY
The previous traffic study concluded that by 2029 “E Sunnyside Rd & S 45th E
intersection received a LOS F. This intersection will not meet BMPO minimum
requirements even without the additional volume from Rocking R Ranch (RRR)…”
The remaining intersections within the study would meet BMPO requirements.
NEW TRAFFIC (TRIPS)
The commercial area is assumed to be developed into a 3,000sqft
medical/dental office and per the ITE TripGen 11th edition this will add 13 AM peak
trips and 5 peak PM trips. Table 1 presents the calculations that determined new
trips, see Attachments for more TripGen details.
Table 1: New Traffic from Medical/Dentist Office
CONCLUSION/RECCOMMENDATIONS
This new traffic is negligible to the studied intersections and won’t significantly
change what was previously reported in the initial RRR traffic impact study. E
Sunnyside Rd and S 45th E is still slated to not meet BMPO requirements by 2029
without new traffic from both land use areas of Rocking R Ranch.
3 sqft (x1,000)
Fitted Curve Equation=T=3.56(X)+2.66
Entering Exiting
59%41%
8 5
Fitted Curve Equation=T=5.36(X)-10.42
Entering Exiting
40%60%
2 3
RRR Commercial Land Use (LC/PB)
ITE TripGen (720) - Medical/Dental Office Building
AM Peak Hour
PM Peak Hour
ATTACHMENTS