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ORD-2013-047
ORANGE COUNTY
BOARD OF COMMISSIONERS
ACTION AGENDA ITEM ABSTRACT
Meeting Date: December 2, 2013
Action Agenda
Item No. 7-a
SUBJECT: Buckhorn Mebane Phase 2 Utilities — Request for Additional Rock Allowance
and Approval of Budget Amendment#3-B
DEPARTMENT: Planning, Financial Services, PUBLIC HEARING: (Y/N) No
Asset Management Services
(AMS)
ATTACHMENT(S): INFORMATION CONTACT:
1) Project Map Craig Benedict, Planning, (919) 245-
2) Photos Showing Rock Excavation 2592
Clarence Grier, Manager's
Office/Financial Services, (919) 245-
2453
Kevin Lindley, Planning, (919) 245-2583
Jeff Thompson, AMS, (919) 245-2658
PURPOSE: To consider approving Budget Amendment #3-B adding additional rock
contingency to the Buckhorn Mebane Phase 2 Utilities Capital project budget.
BACKGROUND: This project has been underway since the Spring of this year. The overall
project is more than 50% complete and consists of three distinct parts: 9,000 linear feet of 18"
gravity sewer line, 14,000 linear feet of 16" water line, and 5,700 linear feet of 8" and 12" gravity
sewer line. These water and sewer lines will serve the areas designated for economic
development and growth near Mebane and along the Interstate corridor in the western portion
of Orange County (see Attachment 1).
The original estimated rock quantity for the 18" sewer line was 3,825 cubic yards. However,
after constructing approximately 4,600 linear feet (51%) of this line, the Contractor has
excavated 6,350 cubic yards of rock as of November 8, 2013. In Attachment 2, there are two
photographs which give an indication of the jobsite conditions and rock quantities encountered
so far. Because of the large quantity of rocky material, the Contractor has brought in a mobile
rock crusher which can be seen in one of the photographs. The contractor has been crushing
the excavated rock and returning it to the upper portion of the trench as fill. This avoids having
to haul the rock out by the truckload for disposal and having to purchase and haul in select fill to
replace the rock that was removed.
The County's engineering consultant, Hobbs, Upchurch and Associates, is estimating that if
conditions stay consistent with the first segment of this line, there could be an additional 4,500
cubic yards of rock left to be excavated to finish this line. If the consultant's estimate proves
2
true, the total rock excavated for this 18" sewer line would be 10,850 cubic yards. When
compared to the original estimate of 3,825 cubic yards, the difference is 7,025 cubic yards.
The rock excavation line item is paid at $60 per cubic yard of rock excavated, so adding an
additional rock contingency of 7,025 cubic yards could potentially increase the construction
costs by $421,500. However, the request is only to add rock contingency to the project budget.
If the Contractor excavates less rock than estimated, this money will not be spent.
The other parts of the project each have their own rock allowance included in the original
project budget. The water line is approximately 75% complete and has used only a fraction of
its rock contingency. Construction of the 8"-12" sewer line has not yet begun, but it has its own
rock allowance, as mentioned above, and can use any remaining rock allowance not used on
the construction of the 18" sewer line, if necessary.
FINANCIAL IMPACT: This project currently has a construction budget of $4,016,546. Adding
the rock allowance contingency as outlined above would increase the construction budget by
$421,500. These extra funds would come from money generated by the Article 46 Sales Tax
and earmarked for infrastructure development. As a result of the additional money that would
be allocated towards this project, other Capital Investment Plan (CIP) projects which are to be
funded in the future by the Article 46 Sales Tax Revenue will have to be delayed or have their
scope reduced. Staff will be making proposals on next year's CIP budget and will suggest
specific project budget modification changes at that time. Budget Amendment #3-B provides
for the additional funds of $421,500 from Article 46 Sales Tax proceeds, and amends the
Capital Project ordinance as follows:
Buckhorn Mebane Phase 2 ($421,500)- Project# 30040
Revenues for this project:
FY 2013-14 Dec 2, 2013 FY 2013-14
Current Amendment Revised
Budget Budget
Alternative Financing $4,256,046 $0 $4,256,046
Appropriated Fund Balance $200,000 $0 $200,000
From General Fund $135,500 $0 $135,500
Article 46 Sales Tax Proceeds $0 $421,500 $421,500
Total Project Funding $4,591,546 $421,500 $5,013,046
Appropriations for this project:
FY 2013-14 Dec 2, 2013 FY 2013-14
Current Amendment Revised
Budget Budget
Professional Services $475,000 $0 $475,000
Construction $4,016,546 $421,500 $4,438,046
Easements, CMT, C&A Study, $100,000 $0 $100,000
Wetlands Mitigation
Total Costs $4,591,546 $421,500 $5,013,046
RECOMMENDATION(S): The Manager recommends that the Board approve Budget
Amendment #3-B by adding $421,500 in rock contingency to the Buckhorn Mebane Phase 2
Utilities project construction budget.
Buckhorn- Mebane EDD Phase 2 Water & Sewer Improvements 3
Project Progress 11/08/2013 lAttachment 1
Attachment 2
Buckhorn Mebane Phase 2 Utilities
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