HomeMy WebLinkAbout8 Brockway Pipeline Change order Agenda Item #
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Public Utility District
Memorandum
To: Board of Directors
From: Jessica Wilson
Date: September 6, 2006
Subject: Change Order No. 1 for the Brockway Transmission Pipeline Project
1. Why this matter is before the board:
Approval from the Board of Directors is necessary to issue a Change Order to a construction
contract.
2. History:
On April 5, 2006, the Board awarded the Brockway Transmission Pipeline project to Vulcan
Construction & Maintenance, Inc., in the amount of$2,976,939.00.
3. New information:
The pipeline construction from the intersection of Bridge St. and Jibboom St. to the intersection
of Martis Dr. and Ranch Way has been completed. As of September 6, approximately 950 feet
remains to be constructed along Bridge St.
I am requesting a Change Order to the Contract for issues covered under four general items
that cover the issues encountered thus far during the pipeline construction.
Item 1: As mentioned in the staff reports to the Board, the casing installation under the
railroad tracks entailed rock excavation. The contractor interpreted the specifications
differently from our intent, which resulted in a meeting with the boring subcontractor
on June 7. At the meeting, it was agreed that additional compensation would be
negotiated upon completion of the casing. The casing installation was completed on
July 18, 2006, almost two months behind schedule. There was over 250 hours of
rock excavation logged to install the 175 feet of casing. Based on Vulcan's bid for
rock excavation, the claim would have been over $250,000, but after a few
discussions the contractor and subcontractor agreed to the amount of$135,042.16.
As a result of this rock excavation issue, I will be revising the specifications and bid
items related to bore and jack operations for projects that are constructed in the
future.
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Item 2: Also mentioned in the staff reports to the Board, the existing pavement along the
pipeline alignment was found to be thicker than the 4 inches allowed for in the Bid
Documents. The pavement was up to 9-inches thick Downtown and up to 18-inches
thick along Brockway. Per the Encroachment permit from the Town, we are required
to replace up to 9 inches of the removed pavement. This resulted in Advanced
Asphalt placing 47 more tons of asphalt Downtown and 54.5 more tons of asphalt
along Brockway. Moreover, Vulcan had to hire Penhall Company to sawcut the
pavement along Brockway because Vulcan did not have a large enough blade on
their asphalt grinder and the additional time required to sawcut ahead of the
trenching operations. Based on the additional costs from Advanced Asphalt for the
extra thickness of pavement and from Penhall Company for the asphalt grinding,
Vulcan is owed $32,205.59 for this work.
Item 3: This item includes the crossing of utilities that were crossed in the field but not shown
on the Contract Drawings. Last year, the proposed Brockway Transmission Pipeline
alignment was surveyed, picking up all the utilities that were marked in the field.
However, it is common practice for utilities to only mark their active lines when an
Underground Service Alert (U.S.A.) is called in. There are many abandoned utilities
that are not marked, especially in the Downtown area. We attempted to include
abandoned lines in the Contract Drawings by going off of the historical drawings and
maps we collected from the local utilities, but unknown utilities were still encountered
during pipeline construction. When an unknown utility was encountered at an
elevation that conflicted with the new pipeline, it was first determined if the utility was
active or abandoned. If abandoned, the utility was removed; if active, the new
pipeline was routed around the utility. Both options cost Vulcan time and lost
productivity.
Following is a sampling of the types of unknown utilities encountered in the field:
• At Bridge Street and Church, three unknown, steel pipelines were found at an
elevation conflicting with the new pipeline. They were determined to be
abandoned water pipes and cut out of the way.
• North of the bridge on Brockway Road, the gas company marked their 2-inch and
8-inch gas lines, which Vulcan found by hand digging. Thinking they were safely
past the gas, they continued to excavate, only to hit another 2-inch gas line, not
identified by the gas company. It resulted in a gas leak and the shut-down of the
area for most of the morning. Later, the gas company explained that one of the 2-
inch gas lines was a vent, which they typically do not mark in the field.
• In the Regional Park, an unknown, direct buried electrical line was snapped
through by the excavator. Excavation and work stopped until it was determined
that the electrical line was not live and abandoned.
Vulcan has associated costs for every hour that their crew, rented vehicles, rented
equipment, and subcontractors can not work due to unforeseen circumstances. We
agreed to the hours and costs incurred by Vulcan for the lost time and productivity.
Vulcan is owed $15,414.41 for this item.
Item 4: This item covers the field conditions that differed from what was shown on the
Contract Drawings. Usually, there is a conflict in elevations at utility crossings. We
attempt to make our Contract Drawings as accurate as possible by referring to
historical maps collected from the local utilities and measuring depths of manholes,
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storm drain inlets and valve nuts, but there is still a certain amount of uncertainty
without potholing every single utility crossing.
The following disparities were encountered in the field:
• At the Regional Park entrance off of Estates Drive, the existing sewer and water
mains were at different elevations than shown in the Contract Drawings, conflicting
with the new pipeline's profile. Vulcan was forced to use additional 45 degree
bends to get under the existing utilities.
• South of the bridge on Brockway Road, an existing 6-inch water main was found to
be in a 24-inch case pipe with concrete backfill, conflicting with the new pipeline's
profile. Vulcan spent the rest of the day rerouting the new pipeline with 45 degree
bends to get over the case pipe.
• In Estates Drive, Vulcan could not find the gas as shown on the Drawings and
where marked in the field by the gas company, so they called the gas company for
help. After a day and a half of searching, Vulcan and the gas company found the
line 15 feet away from the original marking. Production came to a standstill until
the gas main was found for fear of hitting the line.
The associated costs and time that Vulcan's crew, rented vehicles, rented
equipment, and subcontractors were working on these changes to the Contract
Drawings were agreed upon. Vulcan is owed $36,872.76 for this item.
4. Recommendation:
I recommend that the Board authorize Contract Change Order No. 1, in the amount of a
$219,534.92 payment to Vulcan Construction & Maintenance, Inc., from the District.
At this time, there are two more change order items that I expect to bring to the Board in a
Closeout Change Order. The first issue involves rock blasting along Estates Drive and Martis
Drive. On three separate occasions, large rocks were encountered along the alignment falling
under the Rock Work clause in our specifications. It was determined that blasting the rock
would be more economical and quicker than hammering on the rock with a breaker. Although it
was a time saver, the blasting of over 120 feet along Estates removed much of the road's
asphalt as well. Vulcan Construction will be due additional compensation for the Rock Work
and additional asphalt. The second issue involves the Actual vs. Bid Quantities associated with
closing out a project. The actual quantities constructed will be measured at the end of the
project and compared to the bid quantities, resulting in a credit or debit to the District.
Attachments:
Change Order Form
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AUG-31-2006 15:09 5592654715 5592654715 P.02i02
TRUCKEE • Change Order
Contract Name: Brockway Transmission Pipeline
Contract Change Order No: 1 Orig. Contract Amt. $ 2,976,939.00 Days NA
Date: September 6, 2005 Prev. Apprd Changes$ 0.00 Days NA
Contractor: Vulcan Construction& Maint., Inc. This Change$ 219,534.92 Days NA
Revised Contract Amt.$ 3,196,473.92 Days NA
This Change Order covers changes to the subject Contract as described herein. The Contractor shall construct,
fumish equipment and materials, and perform all work as necessary or required to complete the Change Order
Items for a lump sum price agreed upon between the Contractor and District.
Increase in (Decrease) Contract Time
Description of Changes Contract in Contract Extension
Amount $ Amount $ da
1 —Rock Excavation for the Bore&Jack Operation $135,042.16 NA
2—Additional Asphalt $32,205.59 NA
3— Interference with Utilities not shown on the Contract $15,414.41 NA
Drawings
4—Field Conditions differ from Contract Drawings $36,872.76 NA
Totals $219,534.92
Net change in contract amount(increase or decrease) $219,534.92
The amount of the Contract will be increased by the sum of $219,534.92 and the Contract Time shall not be
extended. The undersigned Contractor approves the foregoing Change Order as to the changes, if any, in the
contract price specified for each item including any and all supervision costs and other miscellaneous costs
relating to the change in work, and as to the extension of time allowed, if any, for completion of the entire work on
account of said Change Order. The Contractor agrees to furnish all labor and materials and perform all other
necessary work, inclusive of the directly or indirectly related to the approved time extension, required to complete
the Change order items. This document will become a supplement of the contract and all provisions will apply
hereto. It is understood that the Cha Order shall be effective when approved by the District.
Accepted: /Contractor Date: 3lOco
(Signature)
Approved: /District Date:
(Signature)
Pagel
�3.
TRUCKEE ER Change Order
DistrictPublic Utility
Contract Name: Brockway Transmission Pipeline
Contract Change Order No: 1 Orig. Contract Amt. $ 2,976,939.00 Days NA
Date: September 6, 2005 Prev. Apprd Changes$ 0.00 Days NA
Contractor: Vulcan Construction & Maint., Inc. This Change$ 219,534.92 Days NA
Revised Contract Amt. $ 3,196,473.92 Days NA
This Change Order covers changes to the subject Contract as described herein. The Contractor shall construct,
furnish equipment and materials, and perform all work as necessary or required to complete the Change Order
Items for a lump sum price agreed upon between the Contractor and District.
Increase in (Decrease) Contract Time
Contract in Contract Extension
Description of Changes Amount $ Amount $ (days)
1 — Rock Excavation for the Bore&Jack Operation $135,042.16 NA
2—Additional Asphalt $32,205.59 NA
3—Interference with Utilities not shown on the Contract $15,414.41 NA
Drawings
4— Field Conditions differ from Contract Drawings $36,872.76 NA
Totals $219,534.92
Net change in contract amount(increase or decrease) $219,534.92
The amount of the Contract will be increased by the sum of $219,534.92 and the Contract Time shall not be
extended. The undersigned Contractor approves the foregoing Change Order as to the changes, if any, in the
contract price specified for each item including any and all supervision costs and other miscellaneous costs
relating to the change in work, and as to the extension of time allowed, if any, for completion of the entire work on
account of said Change Order. The Contractor agrees to furnish all labor and materials and perform all other
necessary work, inclusive of the directly or indirectly related to the approved time extension, required to complete
the Change order items. This document will become a supplement of the contract and all provisions will apply
hereto. It is understood that the Change Order shall be effective when approved by the District.
Accepted: /Contractor Date:
(Signature)
Approved: /District Date:
(Signature)
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