To calculate the amount of available water in the overflow pond at its minimum depth of 15 feet, you will use the volume formula for a rectangular prism (since the pond’s shape can be approximated as rectangular) and then convert that volume into gallons.

Here’s the step-by-step process:

1. Calculate the Volume of the Pond at 15 Feet Depth:

The volume of a rectangular prism (or box-like structure) is given by the formula: $V = \text{length} \times \text{width} \times \text{depth}$ From the question:

• Length = 64 feet
• Width = 27 feet
• Depth (minimum) = 15 feet

Now, substitute these values into the formula: $V = 64 \, \text{ft} \times 27 \, \text{ft} \times 15 \, \text{ft}$ $V = 25,920 \, \text{cubic feet}$

2. Convert Cubic Feet to Gallons:

We know that 1 cubic foot of water is equivalent to 7.48 gallons. To find out how many gallons this volume represents, multiply the total cubic feet by 7.48: $\text{Gallons} = 25,920 \, \text{cubic feet} \times 7.48 \, \frac{\text{gallons}}{\text{cubic foot}}$ $\text{Gallons} = 193,881.6 \, \text{gallons}$

3. Conclusion:

At a depth of 15 feet, the overflow pond contains approximately 193,882 gallons of water.

Since the Fire Department requires a minimum of 150,000 gallons, this pond, even at its lowest summer depth, holds enough water to meet the fire department's requirement.

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Would you like more details on any specific part of the calculation, or do you have further questions?

Related Questions:

1. How would the available water change if the pond depth dropped to 10 feet?
2. What factors affect evaporation rates, and how can they be minimized in ponds?
3. How accurate are Google Earth measurements for this type of estimation?
4. What shape approximations work best for irregularly shaped ponds?
5. How can I measure the pond more precisely to ensure compliance with fire regulations?

Tip:

Installing a permanent water level gauge in your pond can help monitor water availability more accurately over time, which may be useful for both irrigation and fire safety purposes.