HomeMy WebLinkAboutTrans 2011-02-22 Item 2A - Discussion - Southcenter Parkway Extension Update i�11LA j1,�,
/a City of Tukwila
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a Jim Haggerton, Mayor
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INFORMATIONAL MEMORANDUM
TO: Mayor Haggerton
Transportation Committee
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FROM: Bob Giberson, Public Works Director
DATE: February 22, 2011
SUBJECT: Southcenter Parkway Extension
Project No. 98410437
Project Update
ISSUE
Present a project update that includes schedule and cost impacts from the US Army Corps of
Engineers (USACE) permit issues.
BACKGROUND
Construction of the Southcenter Parkway Extension project started in July 2010. Some of the
work accomplished to date includes clearing, grading, preload, sanitary sewer (Minkler to
S 180 St), and storm water facilities. Work is currently being performed on the water line
installation (Minkler to S 180 St) and the sanitary sewer lift station.
The roadway project construction includes impact to wetlands, the existing cross valley levee
and one stream; all are regulated by the USACE. The necessary permits for the City fall into two
categories. One permit will cover the necessary filling of streams and wetlands, while the
second permit will deal with impacts to the levee system. Some of these impacts were
addressed in the Segale's Tukwila South original permit applications to USACE. A contingency
plan was prepared to go over the cross valley levee in lieu of Segale's permit. To date, no
permits have been issued by the USACE and the lack of these permits is negatively affecting
the construction schedule and the Contractor's ability to perform certain work.
The two City permits required by USACE are:
Nationwide 14 permit for impacts to Stream E and wetlands (submitted August 2010).
208 permit for construction over the existing cross valley levee (submitted Jan 2011).
Without these two permits, the Southcenter Parkway Extension contractor was notified to stop
all work associated with filling of streams and wetlands on August 20, 2010, but continue with all
other work. The City issued a partial suspension of project work effective December 7, 2010,
and amended that work suspension to include all activities south of South 180 St on February
8, 2011.
ANALYSIS
The lack of the Nationwide 14 permit approval began to impact the road construction project in
late August 2010. Some of the major construction activities originally scheduled to start in the
fall of 2010, but are also pending on the approval of the Nationwide 14 permit, include:
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INFORMATIONAL MEMO
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Removal of the existing bridge.
Roadway embankment work and sanitary sewer installation south of S 180 Street.
Re -route of Stream E between the existing bridge and the llama farm.
The City has been diligently working with the USACE toward issuing the necessary permits. The
Nationwide 14 permit is anticipated to be issued by March 1, 2011. The issuance of this permit
will be significant in that it will allow the Contractor to perform all work on the project except a
small amount of work near the levee.
The delays encountered to date will have both a schedule and cost impact. The specific
magnitude of these impacts will not be known until all permits have been issued and the
necessary analysis has been completed. The actual cost impact could come from the following
work elements:
Contractor home and field office overhead due to additional contract days.
Standby costs for equipment during partial suspension period.
Revisions to the road crossing and associated utilities at the cross valley levee (F -line
intersection).
The project dependence on federal permits and its overall complexity were two reasons we
have a $2.4 million contingency. We anticipated the additional costs related to the permit delays
and we are still within the project's overall budget.
The approval of USACE permits as soon as possible will limit further exposure to delay costs
and schedule impacts. Project staff will also try to resolve any outstanding cost issues with the
Contractor as soon as possible.
RECOMMENDATION
For information only.
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