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Home My WebLink AboutORD-2014-031 McGowan Sewer Interceptor Additional Rock Allowance and Approval of Budget AmendmentORD- 2014 -031 ORANGE COUNTY BOARD OF COMMISSIONERS ACTION AGENDA ITEM ABSTRACT Meeting Date: June 17, 2014 Action Agenda Item No. 7 -f SUBJECT: McGowan Sewer Interceptor Additional Rock Allowance and Approval of Budget Amendment #9 -E DEPARTMENT: Planning, Finance and PUBLIC HEARING: (Y /N) No Administrative Services, Asset Management Services (AMS) ATTACHMENT(S): 1) Project Map 2) Plan Sheets Showing Rock Profile Through Manhole #9 3) Project Photo Showing Typical Depth of Rock Excavation INFORMATION CONTACT: Craig Benedict, Planning, (919) 245- 2592 Clarence Grier, Manager's Office/ Finance and Administrative Services, (919) 245 -2453 Kevin Lindley, Planning, (919) 245 -2583 Jeff Thompson, AMS, (919) 245 -2658 PURPOSE: To consider approving Budget Amendment #9 -E adding additional rock contingency to the McGowan Sewer Interceptor capital project budget. BACKGROUND: This project has been underway since March 17, 2014. The overall project is approximately 85% complete and consists of 2,400 linear feet of 12" gravity sewer line and de- commissioning of the McGowan Creek Sewer Pump Station. The installation of this gravity sewer line will allow the County to take the 26 year -old McGowan Creek Pump Station off line, which reduces the annual maintenance costs for the system and avoids costly reconstruction of the aging pump station (see Attachment 1). The original estimated rock quantity for the 12" after constructing approximately 2,000 linear excavated 4,665 cubic yards of rock. Becaus Contractor has been using a special back hoe allows it to be placed back in the trench. Th truckload for disposal and having to purchase a was removed. sewer line was 2,000 cubic yards. However, feet (83 %) of this line, the Contractor has e of the large quantity of rocky material, the designed to break up the blasted rock, which is avoids having to haul the rock out by the nd haul in select fill dirt to replace the rock that The County's engineering consultant, McGill Associates, is estimating that there could be an additional 1,209 cubic yards of rock left to be excavated to finish this project. If the consultant's estimate proves correct, the total rock excavated for this 12" sewer line would be 5,873 cubic yards. When compared to the original estimate of 2,000 cubic yards, the difference is 3,873 cubic yards. 2 The rock excavation line item is paid at $120 per cubic yard of rock excavated, so adding an additional rock excavation amount of 3,873 cubic yards will increase the construction costs by $464,760. This estimate is based the best available data and is conservatively estimated to be sufficient to cover all rock for the rest of this project. This project has a unit price contract so that a contractor is paid per unit, in this case cubic yards, as the rock is excavated. The contractor will only be paid for the amount of rock excavated, regardless of the amount available in the budget for that particular line item. The project is being funded by a State Revolving Fund (SRF) Loan. The current available loan amount is $774,904. The original construction contract was for $597,813, and the engineering design and construction oversight was $94,200, leaving $82,891 to cover ancillary costs and contingency. To date, there have been change order requests from the contractor and other ancillary costs against this contingency in the net amount of approximately $40,000,-leaving approximately $42,891 to go towards the extra rock excavation cost. Additionally, $57,814 was appropriated to cover costs of the project which cannot be reimbursed through loan proceeds, such as the loan origination fee and easement costs. This amount will still be sufficient to cover the costs for which it was budgeted. FINANCIAL IMPACT: This project currently has a construction contract in the amount of $597,813. Adding the rock allowance contingency as outlined above would increase the construction contract by $464,760. These extra funds would come from remaining contingency of $42,891 and a requested increase of $421,869 in the SRF loan financing this project. Budget Amendment #9 -E provides for the additional funds of $421,869 from SRF proceeds, and amends the Capital Project ordinance as follows: McGowan Creek Outfall — Project # 30043 Rcvannac Mr thic nrnipet annrnnriatinnc fnr thic nrniect: FY 2013 -14 Current Budget June 17, 2014 Amendment FY 2013 -14 Revised Bud et Professional Services $94,200 $0 $94,200 SRF Loan Proceeds $774,904 $421,869 $1,196,773 Article 46 Sales Tax Proceeds $57,814 $0 $57,814 Total Project Funding $832,718 $421,869 $1,254,587 annrnnriatinnc fnr thic nrniect: RECOMMENDATION(S): The Manager recommends the Board: 1. Approve Budget Amendment #9 -E adding $464,760 in rock contingency to the McGowan Creek Outfall project construction contract and authorizing the request for an additional $421,869 in SRF loan funding; and 2. Authorize the Manager to sign on behalf of the Board the change order for the additional rock allowance and any documents related to the pursuit of additional SRF loan funding as outlined in Item 1. + FY 2013 -14 Current Bud et June 17, 2014 Amendment FY 2013 -14 Revised Budget Professional Services $94,200 $0 $94,200 Construction $680,704 $421,869 $ 1,102,573 Easements, Loan Orig., mist. $57,814 $0 $57,814 Total Costs $832,718 $421,869 $ 1,254,587 RECOMMENDATION(S): The Manager recommends the Board: 1. Approve Budget Amendment #9 -E adding $464,760 in rock contingency to the McGowan Creek Outfall project construction contract and authorizing the request for an additional $421,869 in SRF loan funding; and 2. Authorize the Manager to sign on behalf of the Board the change order for the additional rock allowance and any documents related to the pursuit of additional SRF loan funding as outlined in Item 1. Attachment 1 - Project Map E15 rR I I—PS 3 z � m D A E08 O m �. E07 Y • o rr" z PS 624 0 O, J PS Pump Station o, Y� Proposed McGowan Creek Sewer Interceptor Existing Sewer Water Bodies — r N 1 in= 300 feet Streams j O 0 100 Feet Easement Parcels Orange County Planning and Inspections Brian Carson (8/16/2013) Attachment 2 - Rock CCNRNACTOR SHALL PROVIDE TEMPORARY ELECTRIC FENCING IN ORDER TO PROVIDE PROTECTION TO Profile PROPERTY OWNER'S LIVESTOCK. THE FENCING WILL v ALLOW ACCESS TO THE SITE AND BE OF SUFFICIENT CONSTRUCTION TO 70 CONTAIN LIVESTOCK �Gpd'SED 6N CONTRACTOR SHALL PROVIDE PROTECTION • .�CTION OF THE EXISTING BARN. ANY DAMAGES EXCTIN16 M HOLE 0.0 7E.4ARY z 1979-M Dr, XA C710N DUE TO CONSTRUCTION OPERATIONS SHALL 0 1 Go I-- �,l 95GJ6 G BE REPAIRED WITH NO COST THE PROPERTY TO _ERTY OWNER OR ORANGE COUNTY. 0, 01 O6EB$ \!%TM L5EI 05 ?08145 \ -------------- p l "�NJH EINV9184 ',AGE: --------- ----- 20. 10 MANHOLF - ------ ➢ \k" ALL BORES SHALL BE U... NO -- PAYMENT WILL BE MADE FOR FAILED C_ BORE ATTEMPTS. I N EL �pira THE CONFORMED �; 4 RE-ISSUED 04-24-2014] CONINA" SG WT MY DAMAGO GWTIOM OF FENCE VAIN EWAL TO 0 OWAIM MATOU" C (TWOQAL) C"I R tIN119 990565- T, -MAN 0 7 7 r NOTE: OUANTITY AND LOCATION OF EXISTING U1. 1E5 AS SHOWN ARE APPROXIMATE ONLY. 30 r LU EXACT QUANTITIES AND LOCATIONS ARE TO BE VERIFIED IN THE FIELD BY THE CONTRACTOR. I NO. I I I D�M 0 LL V LU 1.0 z C q - W u,,j 0z 0 OR LU U) w 0w a. MMM: =CJ CMC"M..M�� M M pMMM A C MMM MM MM MM Cam... - 0 31v MOM �� . � � �.0 W ON M �FA® _ ..��C�.�...�C�� ..C. Cam. 1.0 z C q - W u,,j 0z 0 OR LU U) w 0w a. i ALL BORES SHALL BE IiMWIi<SCAII: I LMT(• Yi TL[a SANITARY SEWER MANHOLE B WMA E M NO PAYMENT rRLL SE MME FOR FNLEG ' TOP ELEVt 602.62' IHV._ 589.82' TEMPORARY E14TR CONSTRUCTION ENTRANCE (TYPICAL) AFTER PROPOSED SEWER UNE 909E ATTEMPTS. IS COMPLETED AND READY FOR OPERATION. EXTEND 12' PVC ' ALL SORTS SHALL K GUARANTEED I J4NPOSCD d0 LF. W., . SCALE: RELLSED MANHOLE — ¢rg NO PAY,% Fµ1 K MME FOR ' ,;, I I ,I RO X0. 7WCNN65 SRA rw PREPOSED 60 LF, OF 620 A0la 9016 ATTEMPT& /. \ QJS1FiLT NSTALIED'DY 1 'I: SOR919; AMP.JACNN9- / r 20'x0.26' iNGg1E55 STEEL \ /.PROPOSED _ / MARILYN LINER EFLANO F.NGAEETIENT INSTALLED 9v BGI611G AE0 mmHg � ,' . MANHOLE /11 \ � :'.'/ • � 57A. 31 +75.20 - ' N• 84953741 IT 1 ,. ,I_ I' �•'.:. � - PROPOSED . ' � AyHOLE ►12', PINj: 9044892385 �•' D8: 47 PAGE: 42 TEMPORARY ox ""DOfm us mo: 1 „L . PROPOSED. MANNppiE /9 E 1948997.85 I `!� 33+32.0{ PROPOSED MANHOLE /8 SILT FENCE +�'a.w:m�.T . 7N STA. 3V+ {SIBa \ srF:.. . r -� �' r:84H32906 STA. 26 +3D.N (TYPICAL) 1. I \ N) 849558888:28 I ' '.l '194843525 N:849691.44 MPROMMATEByK \ Ei 1844717.47. - - ` E 1949097.94 PIT,Iml? T f' PIN` p �^ _ m loro.Nlr B,�I 7 1Ot2'PACF:, TE lAl�■ r \ / j LINDA N.E. t0N1RA0TW SNAL REMACf 1 / . • { - aPFER - % 1 �' E' J ! A "'J CHARDSON Z1 GaFOE- ' A F PIN 1 9644990965 ANY OAMA4i0 9EO11W 4X• ;J'�.r."'tw ✓�� I Y1 FFNfE MIM EWA. _ /" 1 832 PAW, GWA g, TII/J'f YA1E16A.5 ^' 7'4Y TINGUON E105RNG 1� '\ �' �., .A-'��"` �- �`'�` ..1..�, ,..� i' -iii„ rX ,• 1� •� -.• \., / ,,,,//'' t, _a - ta. ' r ^ -.. osEO MANHOLE P �%' ! F^•-F� --f'-- STA. 29 +20.39 •w �[ ..•` R 4 ,J N:649652.25 •`� - �.,,.. i / / �� y%AN E: 1945510.70 `. a� wo1 NOTE: QUANTITY AND LOCATION OF EXISTING UTILITIES AS SHOWN ARE APPROXIMATE ONLY. EXACT QUANT17XS AND LOCATIONS ARE TO BE VERIFIED IN THE FIELD BY THE CONTRACTOR. PH—L, 12 GRAVITY SEWER -SANITARY 'SEWER `H TOP ELEV: 603 'a 625 r/ SANITARY SEWER MANHOLE ' ' TOP ELEVt 602.62' IHV._ 589.82' �.. AFTER PROPOSED SEWER UNE + " IS COMPLETED AND READY FOR OPERATION. EXTEND 12' PVC ' FROM INLET OF WET WELL TO SCALE: RELLSED MANHOLE — ¢rg A.A. N WET .AND TOP. 625 ' ...._ IL SCALE: HORIL 116D• VERT. t'.6' — ¢rg rw 02D 620 r m '� _ _ �._.... 620 d..- a q 615 z�u �1 Z 3o N2; Actual Rock Profile — Egm D- ROAD 610 -- -- mr r 22 SOD ti a . = I , - 'T - -_ ' � -+26 •DIP -OO 2' DIP 4 157 LF 12 DIP 0 0 22x •.222% 129 LF DIP 357 LF 1 DIP 00229 01 - i ,z. "i. .`. _- -. .. 20•M _• _.. 16. 1NMXN i INB 55 SlEF1 BY _ MC R DPOSED SO •ulrrrrsee ENT NBT G AIJO J �F. OF ST O(010 CONFORMED U UO rA 10 C I- a D_ Z C'. �'Tud q_ Lu 0Z, d c W a Z M _j a a a SHEE' ("AA Attachment 3- McGowan Interceptor Bore Pit — East Side o £ga dCe a Grove Road 8