HomeMy WebLinkAboutAGENDA REPORT 1998 1104 CC REG ITEM 10ADATE:
AGENDA REPORT
CITY OF MOORPARK
The Honorable City Council
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BY:
Kenneth C. Gilbert, Director of Public Works
October 26, 1998 (Council Meeting 11 -4 -98)
SUBJECT: Consider Approval of the Plans and Specifications for
the Reconstruction of the Spring Road Bridge and the
Authorization to Advertise for Receipt of Bids for the
Said Work
DISCUSSION
A. Background
Prior Bids: Last January the project was advertised for bids.
The bids were opened and presented to the City Council in June.
Due to a delay in the project schedule, those bids were
rejected to avoid construction during the winter months. The
project was re- scheduled to allow for commencement of
construction at the end of the 1998/1999 wet season.
No Re- Design: Last August the City Council considered a report
regarding the possible re- design of the bridge. The City
Council concurred with staff's recommendation to not re- design
the bridge. At the direction of the City Council, only minor
revisions were made to the plans and specifications in
preparation for this re- advertisement of the project.
Project Design Elements: A summary of the various elements of
the project design, development, scope and impacts is attached
as Exhibit 1. This summary includes such matters as the need to
drive piles during the construction of the bridge support
footings and the intent to construct a raised median just south
of the bridge, thereby eliminating left turn movements to and
from driveways at that location.
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Spring Road Bridge
November 4, 1998
Page 2
B. Plan & Spec Changes
1. South Bridge Approach: The developer of the Carlsberg
Specific Plan area is required to construct certain
improvements to Spring Road. Those improvements extend
northerly all the way to the bridge. The original design
for those improvements was based upon the presumption that
the City's bridge reconstruction project, including the
reconstruction of approximately 200' of the south
approach, would already be completed. Since the
improvements required to be constructed by the developer
within the bridge approach area could not be constructed
as a part of their project, that work has been added to
the City's project. The cost of the design and
construction of this work is to be funded by the
developer.
2. Minor Corrections: During the bidding process last May, a
number of comments and corrections were received from
various plan holders. Many of those comments and
suggested corrections generated one or more addenda to the
prior set of plans. The plans and specs presented for
approval include those corrections.
3. Language Changes: The specifications have also been
revised by adding certain language pertaining to project
schedule and the commencement of work.
C. Fiscal Impact
1. Project Cost Estimate: The current project cost estimate
is summarized as follows:
Element
Construction
Contingency
Sub -Total Construction
Design Cost
Design Support Costs
Admin & Inspection Costs
Project Contingency
Total
2. Handing Sources: The City is
grant in the amount of $404,800
remainder of the project funding
Road / Tierra Rejada Road AOC.
reports, at the time of the away
project, it may be necessary J
approve an inter -fund loan (froi
AOC) to fully fund this proje
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Total ($)
2,260,000
240,000
2,500,000
120,000
35,000
145,000
50,000
2,850,000
in receipt of a federal
for this project. The
will come from the Spring
As discussed in prior
d of a contract for this
.or the City Council to
a the Los Angeles Avenue
ct. Anticipated future
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Spring Road Bridge
November 4, 1998
Page 3
approve an inter -fund loan (from the Los Angeles Avenue
AOC) to fully fund this project. Anticipated future
revenues to the Spring Road / Tierra Rejada Road ROC are
sufficient to fully re -pay that loan.
3. F12ture Budget Amendment: The figures in the FY 1998/99
Budget were based upon a presumption made last April that
contracts for construction and construction engineering
would have been awarded prior to the end of FY 1997/98. If
that had occurred all of those costs would have been
encumbered in FY 1997/98. Accordingly, only $50,000 was
budgeted in FY 1998/99 as a contingency for additional or
unforeseen expenses. It recommend that the amendment of
the Budget to re- appropriate and fully fund this project
be deferred until the date the City Council considers the
award of a construction contract.
D. Schedule
The bid / award
• 01/07/99:
• 01/20/99:
• 03/01/99:
• 04/15/99:
schedule for the subject project is as follows:
open bids
award contract
Notice to Proceed
commence excavation
E. Plans and Specifications
work in the arroyo
A copy of the plans and specs have been placed in the City
Council office for your review.
RECOMMMATIONS
Staff recommends that the City Council approve the plans and
specifications and authorize staff to advertise for receipt of
bids.
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Exhibit 1: Design Background
Page 1
1. Design Engineer: In September 1994, the City Council
selected the firm of Dwight French and Associates (DFA) to
prepare the design plans and specifications for the
replacement of the Spring Road Bridge across the Arroyo
Simi. When Dwight French & Associates was absorbed by
Charles Abbott Associates (CAA), CAA assumed the
responsibility for completing the design.
2. Existing Bridge Dimensions:
• Bridge Length: 122'
• Bridge Width: 28'
• Travel Lanes: 2 ea. 14' wide
• Median: None
• Bike Lanes: None
• Sidewalks: 2 ea. 2' wide
3. Future Bridge Dimensions:
• Bridge Length: 150'
• Bridge Width: 50'
• Travels Lanes: 2 ea. 12' wide
• Median: 1 ea. 4' wide
• Bike Lanes: 2 ea. 8' wide
• Sidewalks: 2 ea. 8' wide
4. Bridge Support: The existing bridge is supported by the
bridge abutments plus three sets of pier columns placed in
the water course. The new bridge will be supported by the
bridge abutments plus only one center pier wall. Unlike
the sets of pier columns, the center pier wall is designed
to prevent the collection of debris.
5. Piles: The foundations for the bridge abutments, as well
as the center pier wall, will require driving
approximately 2,600 linear feet of piles.
6. Design Requirements: The development of the project
design required undertaking and completing a number of
tasks including:
• Survey
• Roadway alignment
• Right -of -Way acquisition
• Utility conflict Identification and resolution
• Hydrology & Geotechnical Analysis
• Seismic / liquefaction analysis
• Bridge structural design
• Interface with future trail system
• Preparation of plans / profiles
• Traffic control (road closure analysis)
• Construction cost estimate
• Cost estimate for theoretical bridge widening (basis
for grant amount)
• Road widening northwest of bridge
• Striping plans
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Exhibit 1: Design Background
Page 2
7. Levee Trail: One of the transportation goals of the City
is to have a Levee Trail along the Arroyo Simi through the
City, similar to the "river- side" trail in the City of
Simi Valley. The City has received approval of a grant to
perform a study to determine the feasibility of extending
this trail system easterly to Madera Road in the City of
Simi Valley. The bridge design provides for this future
levee trail system by including trail ramps which will go
under the bridge on the north side of the Arroyo.
8. Street Improvements North of the Bridge: The project
includes the construction of full -width street
improvements on the west side of Spring Road just north of
the bridge. These improvements include the construction
of a storm drain to replace the current open culvert, and
the construction of street widening to include a sidewalk
to connect the sidewalk on the new bridge to the sidewalk
along the frontage of Gateway Plaza shopping center.
9. Center Median: The Spring Road street improvements to be
constructed by the developer of the Carlsberg Specific
Plan include the construction of a raised center median
along the entire length of Spring Road south of the
bridge. As mentioned above, the bridge replacement
project includes the construction of a center raised
median on the bridge. The project also includes the
extension of the raised center median north of the bridge.
The design of the existing and future roadway just south
of the bridge has both a horizontal and a vertical curve.
Due to these geometrics of the roadway, as well as the
fact that the median is not wide enough to accommodate
left turn lanes, the median to be constructed south of the
bridge will not any median breaks to allow left turn
movements into and out of driveways located on both sides
of the street just south of the bridge. Turning movements
into and out of these driveways will be restricted to
right turns only. This design is consistent with the
median design near the Tierra Rejada Road bridge.
10. Future Channel Widening: The project design is compatible
with both the existing arroyo channel as well as the
proposed design for a future project by the Ventura County
Flood Control District (VCFCD) to widen and lower the
channel to hold 100 year storm flows. Said future
improvements will include a drop structure just upstream
of the bridge.
11. Street Right -of -Way: The VCFCD has granted the City a
street easement deed which provides for full -width street
right -of -way on the east side of Spring Road across the
arroyo. This easement was required for the construction
of the bridge project.
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Exhibit 1: Design Background
Page 3
12. Temporary Construction Easement: A -C Construction, the
owner of the property on the west side of Spring Road just
north of the Arroyo, granted the City a temporary
construction easement required for the proposed street and
related improvements in that area. It is the intent of
staff to obtain a time extension for that temporary
easement.
13. Environmental Clearance: In April of 1997 the City
Council approved Resolution No. 97 -1306 approving the
Mitigated Negative Declaration for the subject project and
adopting a Mitigation Monitoring Program related thereto.
14. Permits: The City retained the services of a consultant
to obtain certain permits required for this project. Those
efforts included submittal of applications and the
securing of permits (where required) from a number of
agencies including:
• the U. S. Army Corp of Engineers: permit not required;
• the State Regional Water Quality Control Board: permit
issued; and,
• the California Fish & Game Department: permit issued.
In addition to those consultant efforts, staff sought and
obtained permits from the following agencies:
• Caltrans (traffic detour signs); and,
• VCFCD Encroachment Permit
15. Utility Cells: There are eight (8) utility cells located
within the bridge structure. Four of the cells are to be
used for utilities and four will remain empty and
available for possible future use. The cells to be
occupied will be used for gas, telephone, water and sewer.
16. Utility Conflicts:
• Water:
- County Waterworks District No. l: An existing
water line on the bridge will be abandoned during
the bridge reconstruction project. A new water
line will be placed in one of the utility cells
within the bridge structure. The City's project
will include the placement of a sleeve within a
utility cell to receive the future new water line.
All City design and construction costs for this
work will be reimbursed by the District. The work
required to place the new water line will be done
by a separate contractor retained by the District.
- Calleguas: There are no Calleguas facilities
within the existing bridge or planned to be placed
within the future bridge. Calleguas recently
completed the reconstruction of an east -west water
distribution line located just south of the
bridge.
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Exhibit 1: Design Background
Page 4
• Sewer: There is an existing sewer line attached to
the east side of the existing bridge. This facility
will be replaced by County Waterworks District No. 1.
The City's project will include the placement of a
sleeve within one of the utility cells within the
bridge structure, to receive the future new sewer
line. All City design and construction costs for this
work will be reimbursed by the District. All work
required to remove the old sewer line, place a
temporary sewer line and install the new sewer line
will be done by a separate contractor retained by the
District.
• Gas: There is a gas main attached to the existing
bridge. This facility will be abandoned during the
bridge reconstruction project. The Southern
California Gas Company will install a new gas line to
be located within a utility cell in the bridge
structure. All work will be done by the utility
company.
• Shell oil: The Shell Oil Company recently abandoned a
fuel transport line attached to the bridge and
constructed a new replacement line which extends under
the Arroyo.
• Telephone: Existing telephone conduits located under
the Arroyo immediately upstream of the bridge will
remain in place. Bridge structural elements have been
designed to "bridge" these facilities. The City
Council has approved a "Build Over" Agreement between
the City and Pacific Bell Company regarding this
element of the work.
• Electrical: All existing electrical facilities in the
vicinity of the bridge are overhead and are not
effected by the project. No additional street lights
are proposed to be installed on or near the bridge.
Should there be a need for the placement of
underground electrical facilities at any point in the
future, such lines could be placed in an empty utility
cell, if one is still available.
• Cable T. V.: There are no existing cable facilities
in the vicinity of the project.
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