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 CITY COUNCIL AGENDA ITEM NO. 06



Meeting Date: October 22, 2002

Subject/Title: Authorize staff to temporarily close Linden Avenue to through traffic at the Sand Creek Road intersection for Sand Creek Road (Central), CIP Project No. 336-3061.

Submitted by: Engineering: B. Grewal/D. Spekner

Approved by: John Stevenson, City Manager



RECOMMENDATION
Approve a Resolution authorizing Staff to temporarily close Linden Avenue to through traffic at the Sand Creek Road intersection for Sand Creek Road (Central), CIP Project No. 336-3061.

Based upon the background information below, Staff recommends that the City Council authorize the temporary closure of Linden Avenue to through traffic for a period not to exceed two consecutive days for installation of the roadway improvements at the intersection of Sand Creek Road with Linden Avenue. 

PREVIOUS ACTION
On August 28, 2001, the City Council authorized the City Manager to award a Construction Contract to Granite Construction Company to construct Sand Creek Road (Central), CIP Project No. 336-3061.

BACKGROUND
In order to install the roadway improvements at the intersection of Sand Creek Road and Linden Avenue, traffic routing on Sand Creek Road and Linden Avenue must be changed. In order to prepare for this work, the Contractor is already using traditional traffic control methods to install all utility crossings and joint trench work to minimize the required time to complete the work. However, in order to complete the new intersection work safely, it will be necessary to close Linden Avenue to through traffic. Once the new Sand Creek Road/Linden Avenue intersection is completed, the Contractor will divert traffic onto the new Sand Creek Road and will continue the removal of the existing Sand Creek Road between Linden Avenue and Fairview Avenue and complete remaining roadway improvements. 

Staff reviewed three options for completing the Linden Avenue/Sand Creek Road intersection. The first two options will take three consecutive days and the last option would take only two days. The first option is to close Sand Creek Road from Highland Way to Fairview Avenue for no additional cost. Because the City recently opened Sand Creek Road to through traffic from the Bypass, and because the new Sand Creek Crossing Shopping Center just opened, City Staff does not recommend this option. This option will also divert Sand Creek Road traffic through residential neighborhoods, which makes this the last option to be considered.

The second option was to close existing Sand Creek Road and reroute traffic onto the north half of the newly built Sand Creek Road. Unfortunately, this project is only building the minimum width of roadway of 20 feet (one lane plus a bike lane) between Highland Way and Fairview Avenue until CIP funds are replenished and development occurs on the north. If two-way traffic were diverted onto the northern half of new Sand Creek Road, the lanes would not be wide enough to safely accommodate two-way traffic. This option also means changing traffic direction and control measures put in place to connect Sand Creek Road to the Bypass and Sand Creek Crossing Shopping Center. The original traffic control measure cost was approximately $35,000 to install, and it is estimated that changing the traffic control to accommodate this work will cost the City another $20,000 to $30,000. Because of safety, the additional work and costs involved, City Staff does not recommend this option.

The third option is to keep Sand Creek Road open to through traffic under one-way traffic control and close Linden Avenue to through traffic at the intersection of these two roads. The Contractor will rebuild the road in two phases by changing the traditional roadway section of rock and asphalt to deep lift asphalt. Because deep lift asphalt requires less time to install, they will complete the entire intersection in only two days. The change in roadway section does increase the contract by $18,000, but because the work will be done in two days instead of three, and because the work will use traditional one-way traffic control measures, the City will incur no additional traffic control costs. City Staff recommend this option as it has the least cost to the City and least impact to motorists. This work is tentatively scheduled for the last week of October.

The Contractor will place warning signs throughout the connecting routes to warn motorists of the temporary closure. The City will review the Contractor’s traffic detour plans prior to commencement of construction and will notify the Police, Fire Department, and the public of this road closure. The City will work with the Contractor to notify residents and businesses of the proposed road closure dates and detour routes and will update the City’s Traffic Alert section on the web site. 

FISCAL IMPACT
The funds for this work are through facility fees (which are already included in the original contract price), and are also included in the existing budget as approved in this year’s Capital Improvement Program 2002/03.


Attachments:
Resolution
Site Map

RESOLUTION NO. _______


A RESOLUTION OF THE CITY COUNCIL OF THE CITY OF BRENTWOOD AUTHORIZING CITY STAFF TO TEMPORARILY CLOSE LINDEN AVENUE TO THROUGH TRAFFIC AT THE SAND CREEK ROAD INTERSECTION FOR SAND CREEK ROAD (CENTRAL), CIP PROJECT NO. 336-3061.


WHEREAS, On August 28, 2001, the City Council authorized the City Manager to award a Construction Contract to Granite Construction Company to construct Sand Creek Road (Central), CIP Project No. 336-3061; and

WHEREAS, Granite Construction Company will be installing the new intersection of Linden Avenue and Sand Creek Road for the Sand Creek Road (Central) project; and

WHEREAS, the Contractor is using traditional traffic control methods to install all underground utilities to minimize the impact to traffic; and

WHEREAS, in order to complete the work safely it will be necessary to close Sand Creek Road/Linden Avenue intersection; and

WHEREAS, the Contractor will use one-way traffic control for motorists using Sand Creek Road; and

WHEREAS, the City will notify the citizens and service providers prior to the road closure; and

WHEREAS, the detour plan for these improvements will be reviewed and approved by the City Engineer prior to construction.

NOW, THEREFORE BE IT RESOLVED that the City Council of the City of Brentwood hereby authorizes City staff to temporarily close Sand Creek Road/Linden Avenue intersection for two (2) consecutive days to install the new intersection.

BE IT FURTHER RESOLVED that the City Engineer is authorized to determine when the road closure is to begin.

PASSED, APPROVED AND ADOPTED by the City Council of the City of Brentwood at a regular meeting held on the 22nd day of October 2002 by the following vote:

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