MITIGATION MEASURES FOR THE PROPOSED ACTION DESCRIPTION OF RESPONSIBLE PARTY INDICATORS METHODS FREQUENCY MITIGATION MEASURE 5. The dam should be located to DOR Completed Design Narrative in design memorandum explaining the Design and construction minimize height of earth calculations optimization of embankment location and height phase embankment while achieving to provide the required storage capacity and required storage and pressure pressure. In cases where the embankment is to the irrigation system. No greater than six meters high, a special justification embankment should be and technical specification must be included in the greater than 6 m. high. design. As a general rule, embankments taller than 6 meters present more risk of failure due to seepage and piping. (Design Phase ) 6. Embankment Side slopes DOR and Construction Side slope measurements Site plans and specifications should clearly show Design phase and should be at a minimum Contractor the side slopes of the embankment (DOR). Side construction phase 3H:1V. slopes of embankment should be checked during construction for conformance with plans and specifications documents. 7. Alignment/locations of the DOR, Construction Dates of preconstruction Meet on site and lay out the embankment Construction Phase embankment features should Contractor, Farmers field layout alignment before construction begins. The layout be laid out on the ground in at a minimum should include the crest of the the field before construction embankment (where it ties into high ground), begins. Wooden stakes are upstream and downstream toe, spillway, and recommended and may be excavation outline of reservoir. color coded. 8. No excavation activities of DOR and Construction Completed Design Show excavation limits on plans and specifications Design and construction the reservoir shall be closer Contractor and ensure direction is clear. (DOR). Ensure Phase than 10 meters to the compliance with plans and specifications during upstream toe of the construction (CC). embankment. See figure 19 of Tech Guide 9. All the vegetation, rocks and DOR and CC % vegetation, rocks and Show clearing and grubbing excavation section Design and construction loose soil shall be removed loose soil on embankment and detail on plans and ensure direction is clear in from the footprint of the specifications (DOR). Ensure compliance with embankment (clearing and plans and specifications during construction (CC). grubbing).
MITIGATION MEASURES FOR THE PROPOSED ACTION DESCRIPTION OF MITIGATION MEASURE RESPONSIBLE PARTY INDICATORS METHODS FREQUENCY 5. The dam should be located to minimize height of earth embankment while achieving required storage and pressure to the irrigation system. No embankment should be greater than 6 m. high. DOR Completed Design calculations Narrative in design memorandum explaining the optimization of embankment location and height to provide the required storage capacity and pressure. In cases where the embankment is greater than six meters high, a special justification and technical specification must be included in the design. As a general rule, embankments taller than 6 meters present more risk of failure due to seepage and piping. (Design Phase ) Design and construction phase 6. Embankment Side slopes should be at a minimum 3H:1V. DOR and Construction Contractor Side slope measurements Site plans and specifications should clearly show the side slopes of the embankment (DOR). Side slopes of embankment should be checked during construction for conformance with plans and specifications documents. Design phase and construction phase 7. Alignment/locations of the embankment features should be laid out on the ground in the field before construction begins. Wooden stakes are recommended and may be color coded. DOR, Construction Contractor, Farmers Dates of preconstruction field layout Meet on site and lay out the embankment alignment before construction begins. The layout at a minimum should include the crest of the embankment (where it ties into high ground), upstream and downstream toe, spillway, and excavation outline of reservoir. Construction Phase 8. No excavation activities of the reservoir shall be closer than 10 meters to the upstream toe of the embankment. See figure 19 of Tech Guide DOR and Construction Contractor Completed Design Show excavation limits on plans and specifications and ensure direction is clear. (DOR). Ensure compliance with plans and specifications during construction (CC). Design and construction Phase 9. All the vegetation, rocks and loose soil shall be removed from the footprint of the embankment (clearing and grubbing). DOR and CC % vegetation, rocks and loose soil on embankment Show clearing and grubbing excavation section and detail on plans and ensure direction is clear in specifications (DOR). Ensure compliance with plans and specifications during construction (CC). Design and construction
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