HomeMy WebLinkAboutNB 2 JAMBOREE IMPROVS 12-03-90DATE:
TO:
FROM:
NOVEMBER 26, 1990
WILLIAM A. HUSTON, CITY MANAGER
,W BUSINESS N0. 2
12-3-90- 1
Inter - Com
PUBLIC WORKS DEPARTMENT/ENGINEERING DIVISION
SUBJECT: ASSESSMENT DISTRICT NO. 86-2
JAMBOREE ROAD IMPROVEMENTS
RECOMMENDATION:
Pleasure of the City Council.
BACKGROUND:
At a previous meeting the City Council requested staff to review
that segment of Jamboree Road between Station 310 + 40 and 327
+ 50 for the installation of masonry concrete block wall. This
particular area was formerly referred to as the Bowl Area, prior
to the roadway grading operation. Just prior to the City
Council request, staff received a letter from Ms. Carol Wheeler,
(copy of letter attached), representing the residents of the
Cowan Heights area which requested that the City of Tustin as
lead agency on the project to construct a wall on top of the
recently constructed earth berm.
The Environmental Impact Report for Jamboree Road (formerly
North-South Road) identified an*area depicted as Section 4 of
figure 23 (copy attached) where certain residences will have a
view of the Jamboree Roadway. Additionally, it indicated that
application of measures to limit visibility of the roadway in
this particular viewshed area would reduce the impact to a level
of insignificance.
The EIR did not identify any measures that would be required to
mitigate any long term adverse impacts related to noise on
existing land uses or residential developments under
construction.
DISCUSSION:
The area of Jamboree Road (Station 310 + 40 to 327 + 50) in
question was constructed with a 11.4 foot high earthen berm
along the westerly right-of-way line as a mitigation measure to
the residences in Cowan Heights area. The EIR did not specify
particular elevations within the viewshed which had to be
mitigated.
The following is a recap of the three viewshed locations that
have a view of the roadway under three conditions; without the
11.4 foot berm, with the 11.4 foot berm and with the 11.4 foot
berm, plus a 6'-8" wall on top of the berm. These three
viewlines are located between station 310 + 40 and 327 + 50 of
Jamboree Road. These locations are based upon a truck, twelve
feet in height traveling in the outside northbound lane of
Jamboree Road.
ELEVATION OF RESIDENT
DISTANCE ELEVATION AREA FROM WHERE TRUCK
RESIDENTIAL OF TOP OF IS VISIBLE
LOCATION AREA TRUCK NO BERM BERM BERM + WALL
A 1400 FT. 613.4 492 607 678
B 1440 FT. 614.5 489 608 681
C 1700 FT. 615.5 468 608 694
The 11.4 foot berm mitigates the view of roadway to the six
homes on Overhill Drive as outlined in the EIR.
The installation of a 6"-8" high wall on top of the berm for a
distance of approximately 1710 lineal feet would provide
additional view shielding of the roadway to all residences below
the average elevation of 684 feet. The elevation of Cowan
Heights Drive and Sirrine Drive is approximately 665 feet.
The estimated cost for the 1710 lineal feet of wall construction
is $160,000.00 and said construction would be eligible for
Assessment District No. 86-2 Funding. The. Jamboree Road project
account (700077) has adequate funding to cover the cost of the
wall construction. As previously indicated the mitigation
measures related to the viewsheds have been met with the 11.4
foot berm and any additional construction beyond the original
required scope could financially impact the Orange and Tustin
property owners within the Assessment District No. 86-2
boundaries as follows:
After mandated district projects are completed, any
unexpended Assessment District Funds are utilized to
reduce the term of assessment obligations. For
example, an original 20 year term could be reduced to
a period less than the 20 year period. The annual
assessments are not reduced.
The subject wall construction
the City of Orange who is
Assessment District No. 86-2.
desires to proceed with the wa
contact with Orange for their
to the City Council at a later
is located within the limits of
a participating agency within
In the event the City Council
11 construction, staff will make
concurrence and return this item
date for final action.
Bob Ledendecker
Director of Public Works/City Engineer
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City of Tustin
Civic Center 300 Centennial Way
Tustin, CA 92680
Attention: Bob Ledendecker,
City Engineer
Re: Jamboree Road
Dear Mr. Ledendecker:
October 19, 1990
MDj r' • . ,
L
OCT 22 i ;0
TUS,rI% (v::l.-
We are residents of Cowan Heights who have been
severely impacted with the opening of Jamboree Road.
We live in the northerly section of the North-
South Road, bordering what was once called the bowl by
Upper Peters Canyon Reservoir. We can sometimes see and
always hear each car, truck and motorcycle as it crosses
the bowl.
Jamboree is sparsely traveled today but your own
figures predict 54,000 cars per days at build out, and a
future as the Western Leg of the ETC. What we experience
now as the individual sight and sound of vehicles will in
the future become a continuous uninterrupted flow of traffic
24 hours a day.
You have mitigated the bowl with an eleven foot
four inch earthern berm, but as stated in the EIR/EIS,
given consideration to an additional wall on top of the
berm if needed. As the lead agency in the construction of
Jamboree Road, we are formally requesting the City of Tustin
to further mitigate that section of the road with a wall.
The wall can help minimize the intrusion of Jam-
boree Road into our homes, and soften the sights and sounds
that spill through the canyon.
Please give this request your utmost consideration.
Sincerely,
Res. ents o Cowan Heights
i
Carol Wheler
9771 Overhill Dr.
634-3803