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Rio Grande - El Codo Ditch Diversion Rehabilitation_PO, NTP, SOW
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Rio Grande - El Codo Ditch Diversion Rehabilitation_PO, NTP, SOW
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Last modified
9/4/2020 3:01:17 AM
Creation date
11/10/2017 12:31:54 PM
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WSRA Grant and Loan Information
Basin Roundtable
Rio Grande
Applicant
El Codo Ditch Company
Description
El Codo Ditch Diversion Rehabilitation
Account Source
Basin
Board Meeting Date
5/20/2009
Contract/PO #
OEPDA10-01
WSRA - Doc Type
Contract Documents
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June 4,2009 <br /> i <br /> and slopes.Bar splices shall be staggered with bars lapped at least 30 bar diameters,but not less <br /> than 19 inches. Stationing refers to centerline of construction and is the measured horizontal <br /> distance. Contractor will perform all excavations in conformance with OSHA part 1926 subpart <br /> P which may include flattening or shoring side slopes to maintain trench slope stability. <br /> Procedure <br /> Pump water to divert from construction siteas needed—throughout project <br /> Pour 3.5"inch footer for stemwalls <br /> Set forms for stemwall,tie re-bar and pour concrete <br /> Backfill stemwalls <br /> Form floor,tie double knots of re-bars into stem walls <br /> Stub out re-bar for vertical walls <br /> Pour concrete on floors,installing control joint during pour <br /> Form vertical walls <br /> Tie all re-bars <br /> Install chamfers <br /> Build as-built forms for diversion <br /> Pour concrete(wait two days) <br /> Strip forms <br /> Backfill <br /> Deliverable Increase flows in the main channel of the San Antonio,thus maintaining instream <br /> flows and water quality in low flow regimes and reducing sediment loading,woody debris and <br /> logjams in high water conditions.Achieve full diversion of decreed priorities during low flow <br /> regimes,and maintain design flows in the El Codo Ditch diversion and in the bypass of the San j <br /> Antonio River. j <br /> I <br /> TASK 3-Heating and Blanketing of Concrete—as needed <br /> Description of Task -Protect concrete from freezing in the event of cold weather. <br /> Method/Procedure—Per NRCS specifications. <br /> Deliverable—Strength and longevity of concrete structures. <br /> TASK 4—Upgrading Sluice Gate(2 days) <br /> Description of Task replace existing system of installing or removing boards with gear/screw- <br /> driven metal gate. <br /> Method/Procedure -Reeds Tire&Welding construct knife plate for sluice gate.Weld in <br /> framework for gate and install NRCS-designed pre-fabricated gate. Replace the existing sluice <br /> gate with a new gate system. Install according to NRCS specifications. <br /> Deliverable - Safe control of sluice gate regardless of water level. Improved operational control <br /> of flows during low flow regimes and reduced sediment loading,woody debris,and logjams in <br /> high water flows. <br /> El Codo Ditch Company 6 Updated Statement of Work <br />
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