STATISTICS.–The following data relating to the Tabeaud Dam Reservoir will conclude this description:
| DAM. | ||
| Length at crown | 636 | ft. |
| Length at base crossing ravine | 50 to 100 | “ |
| Height to top of crown (El. 1,258.) | 120 | “ |
| “ at ends above bedrock | 117 | “ |
| “ at up-stream toe | 100 | “ |
| “ at down-stream toe | 123 | “ |
| Effective head | 115 | “ |
| Width at crown | 20 | “ |
| Width at base | 620 | “ |
| Slopes, 2½ on 1 with rock-fill 3 to 1. | ||
| Excavation for foundations | 40,000 | cu. yds. |
| Refill by company | 40,000 | “ |
| Embankment built by contractor | 330,350 | “ |
| Total volume of dam | 370,350 | “ |
| Total weight | 664,778 | tons. |
| Length of wasteway (width) | 48 | ft. |
| Depth of spillway sill below crown | 10 | “ |
| Depth of spillway sill below ends | 7 | “ |
| Height of stop-planks in wasteway | 2 | “ |
| Maximum depth of water in reservoir | 92 | “ |
| Area to be faced with stone | 1,933 | sq. yds. |
| RESERVOIR. | ||
| Catchment area (approximate) | 2 | sq. miles. |
| Area of water surface | 36.75 | acres. |
| Silt storage capacity below outlet tunnel | 1,091,470 | cu. ft. |
| Available water storage capacity | 46,612,405 | “ |
| Elevation of outlet tunnel | 1,180 | ft. |
| ““ high-water surface | 1,250 | “ |
| ““ crown of dam | 1,258 | “ |
[Fig. 13] is a view of the finished dam, taken immediately after completion.
CHAPTER V.
Different Types of Earth Dams.
There are several types of earth dams, which may be described as follows:
1. Homogeneous earth dams, either with or without a puddle trench.
2. Earth dams with a puddle core or puddle face.
3. Earth dams with a core wall of brick, rubble or concrete masonry.
4. New types, composite structures.
5. Rock-fill dams with earth inner slope.