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Home My WebLink About2007-06-19; Municipal Water District; 636; Maerkle Reservoir Project1 CARLSBAD MUNICIPAL WATER DISTRICT- AGENDA BILL ,|A AB# 636 MTG. 6/19/07 DEPT. ENG AUTHORIZATION TO ADVERTISE FOR BIDS FOR THE MAERKLE RESERVOIR FLOATING COVER INSPECTION, CLEANING REPAIR AND RAINWATER SYSTEM UPGRADE, PROJECT NO. 5005 DEPT. HEAD /} 1£V:5 CITYATTY. ftf§?y***~- CITYMGR. ~^P> RECOMMENDED ACTION: Adopt Resolution No. 1299 approving plans and specifications, and authorizing the City Clerk to advertise for bids for the Maerkle Reservoir Floating Cover Inspection, Cleaning, Repair, and Rainwater System Upgrade, Project No. 5005. ITEM EXPLANATION: Maerkle Dam is located near the eastern edge of Carlsbad approximately two miles north of Palomar Airport Road. The reservoir behind Maerkle Dam is a 200 million gallon potable water storage facility with a flexible polypropylene floating cover and an asphaltic concrete liner. The floating cover was installed in 1998 to meet California Department of Health Services (CDHS) requirements. The cover is 45 millimeters thick and covers a surface area of about 16 acres when the reservoir is full. The major components of the cover include floats for buoyancy, an access system made up of 19 hatches, and a rainwater removal system made up of eight in-sump pumps and approximately 2,000 feet of discharge hoses. In 2006, CDHS performed an inspection of the cover and requested certain repair and maintenance activities be undertaken. This project will meet the requirements of the CHDS through an inspection, cleaning, and repair of the floating cover and the replacement and upgrade of the rainwater removal system. The rainwater system has reached its useful life and is experiencing hose leaks and pump failures. Since the reservoir contains treated drinking water, failures of the rainwater systems could cause water contamination and expose Carlsbad Municipal Water District (CMWD) to CDHS actions that could result in fines for non-compliance to State health requirements. ENVIRONMENTAL IMPACT: The project is a Class 2 categorical exemption (replacement or reconstruction of existing structures or facilities) and is, therefore, exempt from the environmental review process under provision of the California Environmental Quality Control Act (CEQA) Section 15302(c). FISCAL IMPACT: An Engineer's Estimate of the construction cost totals $139,000. The construction cost includes $48,000 for floating cover inspection, cleaning, and repair; $33,000 to purchase and install flexible discharge hose; $48,000 to purchase and install eight pumps; and, $10,000 to perform all electrical work at the site. The total project cost is shown in Taole 1. TABLE 1 - PROJECT COST ESTIMATE MAERKLE RESERVOIR FLOATING COVER, PROJECT NO. 5005 Total Design Cost Construction (Engineer's Estimate) Construction Contingency (1 0%) Construction Management and Inspection (10%) TOTAL ESTIMATED PROJECT COSTS FY 06/07 APPROPRIATION r -^ESTIMATED -v-a'-COSTS^'^ : $20,000 $139,000 $14,000 $14,000 $187,000 $200,000 FOR CITY CLERKS USE ONLY. 7 BOARD ACTION: APPROVED E DENIED D CONTINUED D WITHDRAWN D AMENDED D CONTINUED TO DATE SPECIFIC D CONTINUED TO DATE UNKNOWN DRETURNED TO STAFF D OTHER-SEE MINUTES D Page 2 Sufficient funds are appropriated to complete the project. EXHIBITS: 1. Location map. 2. Resolution No. 1299 authorizing the City Clerk to advertise for bids for the Maerkle Reservoir Floating Cover Inspection, Cleaning, Repair, and Rainwater System Upgrade, Project No. 5005. DEPARTMENT CONTACT: Eva Plajzer, 760-602-2787 eplai@ci.carlsbad.ca.us LOCATION MAP NOT TO SCALE SITE CITY OF OCEANSIDE HIGHWAY L>» PROJECT NAME MAERKLE DAM FLOATING COVER RAINWATER SYSTEM REPLACEMENT EXHIBIT 1 DRAWN BY: SCOTT EVANS. CARLSBAD ENGINEERING DEPT. 11/20/06 C: \CAPITAL\PLAJZER\UAERKLE DAU COVEK.DWG 1 RESOLUTION NO. 1299 2 A RESOLUTION OF THE BOARD OF DIRECTORS OF CARLSBAD MUNICIPAL WATER DISTRICT (CMWD), AUTHORIZING THE CITY 3 CLERK TO ADVERTISE FOR BIDS FOR THE MAERKLE RESERVOIR FLOATING COVER INSPECTION, CLEANING, REPAIR, 4 AND RAINWATER SYSTEM UPGRADE. PROJECT NO. 5005. 5 WHEREAS, the Board has determined it necessary and in the public interest to implement 6 the Maerkle Reservoir Floating Cover Inspection, Cleaning, Repair, and Rainwater System 7 Upgrade, Project No. 5005; and 8 WHEREAS, the plans and specifications for furnishing of all labor, materials, tools, 9 equipment, transportation, and other expenses necessary or incidental to the Maerkle Reservoir 10 Floating Cover Inspection, Cleaning, Repair, and Rainwater System Upgrade, Project No. 5005, 11 have been prepared and are on file in the Public Works-Engineering Department of the City of 12 Carlsbad and are incorporated herein by reference; and 13 WHEREAS, funds in the Water Replacement Fund have been appropriated and are ^ ^ sufficient for the project. 15 NOW, THEREFORE, BE IT RESOLVED by the Carlsbad Municipal Water District Board 16 of the City of Carlsbad, California, as follows: 17 1. That the above recitations are true and correct. 18 2. That the plans, specifications, and contract documents for the Maerkle Reservoir 19 Floating Cover Inspection, Cleaning, Repair, and Rainwater System Upgrade, Project No. 5005, 20 are on file in the Public Works-Engineering Department of the City of Carlsbad and are hereby 21 approved. 22 3. The City Clerk of the City of Carlsbad is hereby authorized and directed to publish, 23 in accordance with State law, a Notice to Contractors Inviting Bids for the construction of 24 Maerkle Reservoir Floating Cover Inspection, Cleaning, Repair, and Rainwater System Upgrade, 25 Project No. 5005, in accordance with the plans, specifications, and contract documents referred to 26 herein. 27 // 28 // 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 PASSED, APPROVED AND ADOPTED at a Special Meeting of the Carlsbad Municipal Water District of the City of Carlsbad on the 19th day of June, 2007, by the following vote, to wit: AYES: Board Members Lewis, Hall and Packard NOES: None ABSENT: Board Members Kulchin and Nygaard ATTEST: '(SEAL) RE3^Sfe«?*, MaerkleMaerkleDam Floating Cover Dam Floating Cover Rainwater Removal System Rainwater Removal System ReplacementReplacementJune 19, 2007 Project LocationProject LocationMAERKLE DAMWITH FLOATINGCOVEREL CAMINO REAL COLLEGE BLPALOMAR AIRPORT RDMELROSE DRCANNON RDO L L EGE B L OverviewOverviewzMaerkle Dam–PURPOSE – Assist in Providing 10 day drinking water supply–Constructed - early 1960–Asphalt Liner and Polypropylene cover installed 1998 to meet EPA RequirementszCover System–Flexible polypropylene floating cover–Float system to support cover and people–Access hatches provided for inspection–Rainwater removal system installed Flexible Polypropylene Flexible Polypropylene Floating Cover (16 Acres)Floating Cover (16 Acres) Department of Health Services Department of Health Services Maintenance RequirementsMaintenance RequirementszEliminate Any Potential Cross Contamination– Remove Rain Water– Perform Periodic Cleaning of CoverzAll Equipment and Controls to be operationalzMaintain all hoses, fittings, & pumps Rainwater Removal SystemRainwater Removal SystemEight 5HP sump pumps –70’ at 30 gpm–start and stop by float switchesDischarge hoses •Size: 3 and 4-inch•strapped to cover•designed for sump pump pressure and flexibility Damage to Rainwater Removal Damage to Rainwater Removal SystemSystemzPumps–Float Switch caused pumps to operate when no water present & frequent cycling, result motor overheating• HosesLeaks due to exposure to ultraviolet light Solution For Sump PumpSolution For Sump Pump•Larger Sump Wells•Replace Pumps with Oil cooled pumps•Change Float Switch•Include Relay Timer to reduce cycling•Use Brass Discharge Piping and Valves Hose Material ComparisonHose Material ComparisonHoseAdvantagesDisadvantagesPVC•Low initial cost•Easy to work with•Light weight•Flexible•Short life (1 to 2 years)•Increased maintenance•Poor UV resistanceEPDM•Known historic service life•Medium UV resistance•Light weight•Flexible•Medium service life 6 yrs•Operates near maximum pressure rating when reservoir lowHeavy Duty Rubber•Longer service life 10 to 12 yrs•UV inhibitors •Maximum pressure rating is 3 times expected pressure•Unproven service life•Heavy weight•Not flexible•Difficult to install & move Hose Material CostsHose Material CostsHose MaterialMaterial CostEstimated Installation CostTotal CostAnnual CostPVC$8,660$18,550$27,210$13,600EPDM$12,450$18,550$31,000$5,170Heavy Duty Rubber$16,448$18,550$35,000$3,500 Total Project CostsTotal Project CostszDesign Cost $20,000zFloating Cover Inspection, cleaning & Repair - $48,000zFlexible Discharge Hose, 2000’- $33,000zReplace Sump Pumps, 8 - $48,000zElectrical Work - $10,000zContingencies - $14,000zConstruction Admin. Inspection - $14,000zTotal Cost - $187,000 Questions????Questions????