HomeMy WebLinkAbout1997-032-03/04/1997-CHOICES 95 PROJECT CONSTRUCTION FINAL DESIGN PROSPECT TO SUMMITVIEW TIMBERLINE EXTENSION RESOLUTION 97-32
OF THE COUNCIL OF THE CITY OF FORT COLLINS
DIRECTING CITY STAFF TO PROCEED WITH THE FINAL DESIGN AND
CONSTRUCTION OF THE "TIMBERLINE EXTENSION - PROSPECT TO SUMMITVIEW"
CHOICES 95 CAPITAL STREETS PROJECT
WHEREAS, on May 1, 1984, the electors of the City of Fort Collins approved the passage
of Ordinance No. 30, 1984, which imposed a 1/4 cent Sales and Use Tax for the purpose of
generating revenue for certain specified capital projects, including the acquisition of right-of-way
for the extension of Timberline Road from Prospect to Summit View(the "Timberline Project" or
the "Project"); and
WHEREAS, from 1985 through 1987, Seven Hundred Seventy-nine Thousand Dollars
($779,000.00)was appropriated by the Fort Collins City Council (the"Council") for the acquisition
of such right-of-way; and
WHEREAS, additional funding for the Timberline Project has been obtained by the City
through revenues generated by a quarter-cent sales and use tax approved by the voters in 1989 for
the purpose of raising revenue for various projects described in the "City of Fort Collins Choice 95
Executive Committee Final Report," dated October 7, 1988; and
WHEREAS, on June 11, 1996,the Council adopted Resolution 96-70 directing City staff to
proceed with the design work and right-of-way acquisition for the Timberline Project and
determining that the Project shall be designed so as to extend Timberline Road from Prospect to
Summitview; and
WHEREAS, the foregoing Resolution further provided that, upon completion of the design
of the Project, and prior to undertaking any construction work related thereto,the City Manager was
to present for Council's consideration: (a) an estimate of the total cost of the Project, including the
cost of mitigating the impacts of the Project; and (b) such ordinances as may be necessary to
appropriate any additional funds needed to complete the Project and mitigate its impacts; and
WHEREAS, after considerable additional public outreach, City staff has proposed a
preliminary design of the Timberline Project which is described on Exhibit"A"attached hereto and
incorporated herein by this reference; and
WHEREAS,discussions among City staff and with the public have addressed the appropriate
scope of the project, the coordination of the Project with other capital improvement projects of the
City, the design of the Project and the schedule for construction of the same; and
WHEREAS,as part of the 1997 annual appropriation ordinance,the Council has appropriated
sufficient funds to construct the Timberline Project as described on Exhibit"A"; and
WHEREAS, City staff is seeking Council authorization to undertake the construction of the
Project.
NOW, THEREFORE, BE IT RESOLVED BY THE COUNCIL OF THE CITY OF FORT
COLLINS, as follows:
Section 1. That the City Manager is hereby authorized and directed to proceed with the
construction of the Timberline Project according to the design shown on Exhibit "A" and he is
further authorized to approve such modifications to said design as he may, in his discretion,consider
to be necessary to effectuate the purposes of the Project, taking into consideration those factors
discussed in the"Timberline Road Extension Preliminary Design Report," dated January 19, 1997
(the "Report"); provided,however,that(a) sufficient monies have previously been appropriated by
the Council, and will be available to pay any additional costs that may be incurred by reason of such
modifications; and (b) the City Manager informs the City Council in advance of any such
modifications that may substantially modify or eliminate any of the components of the Project as
described on Exhibit "A".
Section 2. That,in addition to the components of the Project included in the design described
in Exhibit"A", City staff is directed to obtain cost estimates for the construction of two additional
lanes of traffic at the intersection of Mulberry Street and Timberline Road,as described in Paragraph
D2 on Page 11 of the Report, for possible future inclusion of such improvements in the Project if
adequate additional funding for such improvements is subsequently appropriated by the City Council
for such purpose.
Passed and adopted at a regular meeting of the City Council held this 4th day h, A.D.
1997. �l
n,gym
Mayor
ATTEST:
City Clerk
2
EXHIBIT A
Preliminary Project Scope
Timberline Road Extension - Prospect Road to Summitview Drive
I. Multi Modal Corridor Improvements
A. Two 12' vehicle lanes, two 8' bicycle lanes, and a T detached meandering
sidewalk for pedestrians are included. These improvements are in their permanent
location when the roadway is widened in the future.
B. Curb and gutter will be constructed along already developed areas and at
intersections.
C. Curb and gutter will not be constructed across the Veldman/Morgan Property, the
natural resource land, and between Lincoln and International, to allow for a more
natural look as envisioned in the River Corridor Plan.
II. Poudre River Bridge
A. The bridge over the Poudre River will be 340' long, have three spans, and only
four support piers.
B. The bridge will pass the 100 year flood without water over topping Timberline
Road and without increasing the upstream flood water elevation by more than
0.5 .
C. The bridge structure will be a cast in place box girder type supported by two sets
of two piers and the abutments. The four oval piers will allow for an open feeling
under the bridge with maintained views of the river channel.
D. The bridge will be designed with no expansion joints in the pavement and with 25'
approach slabs on both approaches to the bridge. The approach slabs help to
eliminate the "bump" noise at each end of the bridge that results from the
embankment settling next to the bridge abutments. Without bumps and joints the
bridge will be much quieter.
E. The bridge will have an earth tone color and dark green pedestrian railings with
stone pedestals every 45'.
III. Poudre River Channel Improvements
A. An 800' long, 11' deep conveyance channel with a top width of 135' and a bottom
width of 20' will be constructed to the southwest of the existing river channel.
B. The channel is necessary to save the vegetation in the existing channel, provide a
wider wildlife corridor, and carry the 100 year flood.
C. The channel will be landscaped with native vegetation. We hope to create
additional wetlands in the conveyance channel.
D. Water will flow in the conveyance channel during spring runoff for approximately
three months each year.
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E. The bank on the north side of the bridge and the upper end of the conveyance
channel will be protected with riprap. The riprap will be covered with 12" of
topsoil and revegetated.
IV. Intersections
A. Prospect Road
► At Prospect Road the street will include a through lane in each direction, a
left turn lane and a right turn lane.
► The project is limited to two lanes and two turn lanes at this intersection
due to existing geometrics on Timberline Road south of Prospect Road.
► Traffic at this intersection will be controlled by the existing signal,
requiring some modifications.
B. Countryside Drive
► Countryside Drive will be realigned to the south approximately 300' to
provide full access to the Countryside Neighborhood.
► Access to the Countryside Nursery and Riverbend Ponds will come off the
new alignment of Countryside Drive.
► Traffic at this intersection will be controlled by stop signs on Countryside
Drive.
C. Mulberry Street
► At Mulberry Street (Highway 14) the street will be include a through lane
in each direction, a double left turn lane, a right turn lane, and medians to
chanelize traffic.
► The intersection will be constructed at the width required for four lanes so
that it can be easily widened to four lanes in the future by widening into
the median. Until the intersection is widened in the future the median will
be 3 P to 43' wide.
► The medians and traffic lanes will be constructed in their ultimate location
and in the future the street will be widened to the outside for the ultimate
six lanes.
► The traffic at this intersection will be controlled by a new traffic signal.
► The frontage road access will be closed and a cul-de-sac built on each side
of Timberline Road.
D. Lincoln Avenue
► At Lincoln Avenue the street will include a through lane in each direction,
a left and a right turn lane, and medians to channelize traffic.
► Lincoln Avenue will be widened to add left turn lanes.
► The traffic at this intersection will be controlled by stop signs on Lincoln
Avenue.
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E. Donella Court
► The street will include a through lane in each direction and left turn lanes.
► The Poudre Fire Authority will fund a fire signal at this intersection to
allow for quicker and safer access on to Timberline from the fire station on
Donella Court immediately east of Timberline.
► The traffic at this intersection will be controlled by stop signs on Donella
Court.
F. International Boulevard
► The street will include a through lane in each direction and left turn lanes.
► The traffic at this intersection will be controlled by a stop sign on
International Boulevard.
► Summitview Drive will end just south of International Boulevard and a
cul-de-sac constructed.
V. Drainage and Ground Water Improvements
A. Poudre River Right Path (R-Path) Floodway
► West of the new bridge is a low area that presently allows flood water to
split to the right out of the main Poudre River channel. This flood path
flows across the natural resource area, across the Veldman/Morgan
property, across another natural resource area, into Spring Creek, and then
back to the river.
► Several options were identified to address the R-Path flows to protect
Timberline Road during a 100 year flood.
► Construction of a meandering berm to keep the flood water from splitting
out of the channel at an approximate cost of$75,000 is required. The
berm will be shaped and landscaped to look very natural and blend in with
the existing topography.
► The berm was chosen as the best overall solution and will be built in
coordination with the restoration of the natural resource area to ensure
compatible design.
B. Ground Water
► North of Lincoln Avenue the ground water varies from 1' to 4' deep below
ground. To allow the construction of the roadway, this area will need to
be dewatered.
► An extensive 2,400' dewatering trench with perforated pipe and a washed
rock collection gallery will be used to dewater this area.
► The ground water will drain into the Dry Creek Channel, the construction
of which is being coordinated with this project.
C. Storm Drainage Improvements
► Curb and Gutter and road side ditches will be used to carry the street
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runoff to the low points where the runoff will be collected by inlets.
► North of the Poudre River the runoff will be drained to the Dry Creek
Channel which drains to the Poudre River.
► South of the Poudre River across the Natural Area the runoff will be
drained back to the river in drainage swales.
► South of the Natural Area across the Veldman/Morgan property the runoff
will be drained to the existing gravel ponds, which drain to Spring Creek.
► South of the Veldman/Morgan property to Prospect the runoff will be
drained across the new BMC development in a drainage Swale to Spring
Creek.
VI. Irrigation Ditch Crossings
A. Cache La Poudre Reservoir Inlet Ditch along the south side of Lincoln will
require a 30' span concrete deck bridge which will be supported on steel H-piles
driven into bedrock. The bridge will be built to the ultimate 14 F cross section,
since it would be very costly to widen both sides of the culvert by only 20' in the
future.
B. Lake Canal which crosses the Summitview and International intersection will
need to be widened on the east side approximately 40'.
VII. Miscellaneous Construction Items
A. The runway at the Downtown Airpark will be extended 400' to the northwest to
take Timberline Road out of the glide path at the southeast end of the runway.
B. A seven unit storage garage and the State Patrol Building will be removed.
C. A Public Service overhead power line will have to be put underground.
D. The loss of these trees will be mitigated by planting new trees along the river in
the conveyance channel. The City Forester will work with the Releaf group as
plans are developed and the trees are marked.
E. Extensive traffic control will be required to reduce Mulberry from four lanes to
two lanes to construct the Dry Creek culvert and the intersection improvements
one half at a time.
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