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 CITY COUNCIL AGENDA ITEM NO. 11


Meeting Date: March 11, 2003

Subject/Title: Authorize staff to temporarily close the Sand Creek Road/O’Hara Avenue Loop from Brentwood Boulevard to Central Avenue for Sand Creek Road (East), 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 the Sand Creek Road/O’Hara Avenue Loop from Brentwood Boulevard to Central Avenue for Sand Creek Road (East), CIP Project No. 336-3061. 

Based upon the four alternatives described below, staff recommends that the City Council authorize the temporary closure of the Sand Creek Road/O’Hara Avenue Loop from just west of Brentwood Boulevard to just north of Central Avenue for a period of two weeks to construct a temporary shoofly east of the existing Sand Creek Road/O’Hara Loop. Work is expected to begin on or about March 17, 2003.

PREVIOUS ACTION
On July 23, 2002, the City Council authorized the City Manager to sign a Construction Contract with Top Grade Construction, Inc. for the construction of Sand Creek Road (East), CIP Project No. 336-3061, from east of Minnesota Avenue to just west of Brentwood Boulevard, crossing the Union Pacific Railroad.

On September 10, 2002, the City Council authorized staff to close the Sand Creek Road/O’Hara Avenue Loop for four weeks to install underground utilities for the construction of Sand Creek Road (East), CIP Project No. 336-3061.

BACKGROUND
The Sand Creek Road (East) project is under construction. This project will complete the Sand Creek Road connection between Minnesota Avenue and Brentwood Boulevard, with an at-grade crossing across Union Pacific Railroad. It will also construct the intersection of Sand Creek Road and O’Hara Avenue to its ultimate configuration. The new roadway intersection will be approximately 8 feet higher than the existing ground. This high-grade difference and the design parameters together with physical constraints will impact the functioning of the existing Sand Creek/O’Hara Avenue Loop traffic. 

In order to construct this new Sand Creek Road/O’Hara Avenue intersection and roadway construction for the Sand Creek Road (East) project, traffic routing on the Sand Creek Road/O’Hara Avenue Loop must be changed. The City met with the Contractor on February 20, 2003, to discuss the various alternatives available to complete the installation of the intersection and roadway for this CIP project. The work scheduled for construction includes completion of the roadways, and the installation of retaining walls, sound walls, site grading, sidewalk, curb & gutter, and related facilities. 

The following four alternatives were considered for completing the work this construction season. 

One alternative would be to keep the loop road open and use flagmen and traffic control signs to move the traffic through the construction site. This alternative is the most costly (estimated to be $ 240,000.00) and would require the longest duration of inconvenience to the public and would extend the completion date of the work. Although possible, City staff does not recommend this option, as it would require changes in design.

A second alternative would be to close the road for the remaining construction period estimated at eight months (March through November 2003). This alternative does not add costs to the project; however, there will be a great inconvenience to the public and surrounding businesses for the eight-month construction period.

The third alternative would require the City to direct the Contractor to alter their construction schedule and perform work out of sequence. This alternative would still require a total of a three to five month road closure and may cost the City an additional $140,000 for additional traffic control, overhead, and inefficiencies in operations and will be a great inconvenience to the public from May through September 2003.

The fourth, safest and most cost effective alternative would be to temporarily close the road for a period of two weeks, build the shoofly just east of the existing road, and reopen the new shoofly to traffic for the duration of construction. The additional cost to construct the shoofly is estimated at approximately $160,000 and will only impact the public during the two-week installation and possibly a two-week removal period in the fall of 2003. City staff considered building a shoofly when the road was closed last fall; however, property issues prevented the City from pursuing this. Property issues have since been resolved and will allow the City to build the shoofly. This will be the safest alternative and will cause the least inconvenience to the public and local businesses. 

The road closures will be installed as shown on the attached detour map. All traffic will then be detoured onto Brentwood Boulevard or Central Boulevard, both of which will remain open to traffic. City staff will work with the Contractor to minimize the impact these road closures will have on local businesses. The City will review the Contractor’s traffic detour plans prior to commencement of construction and will notify the public, neighboring residents, businesses, the Police Department, and the Fire Department of each road closure. 

City staff has reviewed all four alternatives and recommends that the City Council approve the fourth alternative and authorize the two two-week road closures of the Sand Creek Road/O’Hara Avenue Loop to install and later remove the temporary shoofly road. 

FISCAL IMPACT
The funds for this work are through facility fees, which are included in the existing budget as approved in this year’s Capital Improvement Program 2002/03.



Attachments:
Resolution
Site Map
Detour Route

RESOLUTION NO. 


A RESOLUTION OF THE CITY COUNCIL OF THE CITY OF BRENTWOOD AUTHORIZING CITY STAFF TO TEMPORARILY CLOSE THE SAND CREEK ROAD/O’HARA AVENUE LOOP TO THROUGH TRAFFIC FOR TWO TWO-WEEK PERIODS FOR SAND CREEK ROAD (EAST), CIP PROJECT NO. 336-3061.


WHEREAS, on July 23, 2002, the City Council authorized the City Manager to sign a Construction Contract with Top Grade Construction, Inc. for the construction of Sand Creek Road (East), CIP Project No. 336-3061, from east of Minnesota Avenue to just west of Brentwood Boulevard, crossing the Union Pacific Railroad; and

WHEREAS, Top Grade Construction, Inc. will be installing the Sand Creek Road/O’Hara Avenue intersection and roadways for the Sand Creek Road (East) project; and

WHEREAS, four alternatives were considered for completing this project this construction season; and

WHEREAS, the first alternative keeps the roadway open and uses traffic control to stage the work. This alternative is the most costly, most inefficient, will extend the project completion date and will still require intermittent road closures; and

WHEREAS, the second alternative would be to close the road for the an eight-month construction period (March to November), which will not increase the cost of the work, but will impact the public during the entire eight-month closure; and

WHEREAS, the third alternative requires a three to five month road closure and may cost the City an additional $140,000 for traffic control, overhead, and inefficiencies in operations to change the sequence of work and will be a great inconvenience to the public from May through September 2003; and

WHEREAS, the fourth alternative requires two two-week road closures to install and later remove the temporary shoofly road and may cost the City an additional $160,000 for the extra materials and labor to install, but will have a minimal impact to the public. 

NOW, THEREFORE BE IT RESOLVED that the City Council of the City of Brentwood hereby authorizes City staff to temporarily close the Sand Creek Road/O’Hara Avenue Loop for two two-week periods to install and remove a temporary shoofly road to complete construction of the Sand Creek Road/O’Hara Avenue intersection and roadways.

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

BE IT FURTHER RESOLVED that staff will notify the public, neighboring residents and businesses, the Police Department and the Fire Department of each road closure prior to commencement of construction.

PASSED, APPROVED AND ADOPTED by the City Council of the City of Brentwood at a regular meeting held on the 11th day of March 2003 by the following vote:
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