Laserfiche WebLink
<br />3.4 REPLACE CONCRETE <br /> <br />Concrete will be poured to replace the damaged concrete that is to be removed, to overlay <br />damaged concrete, and to extend the chute. The new floor slab inn the inlet structure will <br />be installed I foot higher than the original slab to facilitate installing the new under drain <br />system. In addition, the higher slab will buttress the toe and cover the damaged concrete <br />of the east wall. A 9-inch thick concrete overlay is provided for the floor slab of the <br />chute structure. The overlay concrete slab will be reinforced and anchored to the existing <br />floor slab. <br /> <br />The chute extension will match the downstream end of the existing chute and will be tied <br />to the existing concrete with reinforcment. <br /> <br />All new concrete has two layers of reinforcement and is anchored to the foundation with <br />grouted anchor bars. <br /> <br />3.5 SURFACE DRAINAGE <br /> <br />All surfaces adjacent to the inlet structure are blanketed with embankment material and <br />graded to slope away from the walls. A drainage ditch behind the west wall provides a <br />safe avenue for surface runoff to flow into the reservoir. The stream channel on the west <br />side of the road has an impervious lining to insure that no water is available from this <br />source to saturate the foundation. In additi(ln, a concrete barrier wall is provided between <br />the stream channel and the road to prevent over-bank discharges from flowing to the west <br />wall of the spillway. <br /> <br />4.0 SPILL WAY DESIGN <br /> <br />4.1 GENERAL <br /> <br />This section presents the design criteria for modifications to the spillway structure. The <br />section presents detailed discussion, bases of design, and analysis. Design criteria and <br />calculations are included in the Appendix of this report. <br /> <br />4.2 HYDRAULIC DESIGN <br /> <br />No hydraulic design was conducted for the spillway except that the maximum discharge <br />of the structure was confinued and the effects of raising the inlet floor were assessed. <br /> <br />4 <br />