HomeMy WebLinkAboutNB 7 T.R.R. EXTENSION 10-16-89''::"= i r.f
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DATE: OCTOBER 6, 1989
TO:
WILLIAM HUSTON, CITY MANAGER
FROM:
PUBLIC WORKS DEPARTMENT/ENGINEERING DIVISION
SUBJECT: TUSTIN RANCH ROAD EXTENSION BETWEEN WALNUT AVENUE
AND EDINGER AVENUE (File #2369.1)
RECOMMENDATION:
That the Tustin City Council at their meeting of October 16, 1989:
1. Receive and file Tustin Ranch Road Project Design Report.
2. Authorize staff to solicit proposals for final design
services, plan preparation, and preparation of environ-
mental document based on Alternative I.
3. Authorize commencement 6f negotiations with the Marine
Corps for approximately 12.3 acres of right-of-way
acquisition.
,
BACKGROUND:
In August 1988, the City Council authorized the preparation of a project
design report for the extension of Tustin Ranch Road between Walnut
Avenue and Edinger Avenue, a distance of approximately one-half mile. A
copy of' the report is attached for the City Council's information.
This roadway would join the soon to be constructed northerly segment of
Tustin Ranch Road at Walnut Avenue and extend southerly towards Edinger
Avenue. The road would bridge over the Orange County Flood Control
right-of-way, the AT&SF Railway right-of-way and Edinger Avenue, and
would return to Edinger by means of a loop ramp system and a T-type
intersection which would be signalized. Please refer to sheets 2 and 3
of 15 in Appendix E for concept layout of the loop ramps.
The .loop ramp configuration woUld encroach into the MCAS facility and
require the acquisition of approximately 12.3 acres of land from MCAS.
The roadway portion north of the Flood Control right-of-way has been
previously dedicated to the City as a condition of approval of Tract Map
No. 8763.
This project also provides for the construction of a new 6'- 8" concrete
block screenwall along the westerly side of Tustin Ranch Road extending
along the top of the embankment between the new bridge and Walnut Avenue.
TUSTIN RANCH ROAD EXTENSION
OCTOBER 6, 1989
PAGE 2
The study has provided two alternatives for the project. The primary
difference between alternatives is the length of bridge structure
utilized to span the Flood Control facilities. Alternative I utilizes a
longer bridge to span the Flood Control channel while Alternative II
utilizes a shorter bridge in combination with a box culvert facility for
the Flood Control channel. Comparative costs for each alternative are as
follows:
Alternative I
Irvine Co. obligation $1,030,215
City of Tustin 5,340,379
$6,370,594
$6,371,000
Alternative II
Irvine Co. obligation $1,143,773
City of Tustin 5,114,921
$6,258,694
$6,259,000
The above-mentioned construction costs do not include right-of-way costs
for approximately 12.3 acres of land to be acquired from MCAS.
DISCUSSION:
The City Council has authorized $150,000 in the 1989-90 Capital
Improvement Budget for the final design and environmental documentation
of the Tustin Ranch Road extension to Edinger Avenue. Staff is request-
ing authorization for the following:
1. Solicitation of proposals to consultants for final design, plan
preparation and preparation of an environmental document for the
project based upon Alternative I. The environmental documenta-
tion would cover the area southerly of the Orange County Flood
Control right-of-way only. The, remaining portion of the project
has been covered by a previous environmental document processed
under Tract No. 8763.
2. Commence formal negotiations with the Marine Corps staff to
acquire the required 12.3 acres of right-of-way for the 'loop
connection to Edinger Avenue.
It is estimated that the final design, plan preparation and environmental
document will take approximately 12-15 months to complete.
TUSTIN RANCH ROAD EXTENSION
OCTOBER 6, 1989
PAGE 3
The construction schedule for this project will be subject to the
availability of funding for both the City's share of the construction
cost and the full right-of-way costs. Without the passage of Measure M
(1/2 cent sales tax), increase in State gasoline taxes, or the
implementation of other revenue streams, this project could take several
years to impIement. However, it is extremely important to proceed with
the design phase and have a shelf-ready project in the event an unknown
source of funding becomes available.
Bob Ledendecker
Director of Public Works/City Engineer
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