Ponds 103 Chapter 8
How Much Rock for the Pond
Since we’re looking at a couple of different ways to rock a pond, namely, the popular fully ‘Rocked-and-Graveled’ style where all liner surfaces are completely covered and the Hybrid style with fewer boulders and no gravel in the pond, only in the stream, let’s look at relatively how much rock and gravel we’re talking about. The formulas for boulder calculation below are well-respected and commonly accepted. Note that there is no difference in the quantity of boulder and gravel used in stream construction between the two styles; only the quantity of rock and boulder within the perimeter of the pond differs between styles.
Quantity of Boulders and Gravel needed for a Fully Rocked and Graveled Pond
Tons of Boulders = Length x Width ÷ 40
Tons of Gravel = Tons of Boulders ÷ 4
Quantity of Boulders and Gravel for a Stream
Tons of Boulders = 1.5 tons for every 10' of stream
Tons of Gravel = Tons of Boulders ÷ 4
Ratio of Sizes of Boulders
For every 1 Ton of 6" - 12" boulders, get 2 Tons of 12" - 18" boulders, 1 Ton of 18" - 24" boulders
Quantity of Boulders needed for a Hybrid Pond (RSVP Profile)
Tons of Boulders = Length x Width ÷ 80 (half as much because only one shelf is rocked)
Quantity of Boulders and Gravel for a Stream
Tons of Boulders = 1.5 Tons for every 10' of stream
Tons of Gravel = Tons of Boulders ÷ 4
Ratio of Sizes of Boulders*
For every 1 Ton of 6" - 12" boulders, get 2 Tons of 12" - 18" boulders, 1 Ton of 18" - 24" boulders
Since we’re looking at a couple of different ways to rock a pond, namely, the popular fully ‘Rocked-and-Graveled’ style where all liner surfaces are completely covered and the Hybrid style with fewer boulders and no gravel in the pond, only in the stream, let’s look at relatively how much rock and gravel we’re talking about. The formulas for boulder calculation below are well-respected and commonly accepted. Note that there is no difference in the quantity of boulder and gravel used in stream construction between the two styles; only the quantity of rock and boulder within the perimeter of the pond differs between styles.
Quantity of Boulders and Gravel needed for a Fully Rocked and Graveled Pond
Tons of Boulders = Length x Width ÷ 40
Tons of Gravel = Tons of Boulders ÷ 4
Quantity of Boulders and Gravel for a Stream
Tons of Boulders = 1.5 tons for every 10' of stream
Tons of Gravel = Tons of Boulders ÷ 4
Ratio of Sizes of Boulders
For every 1 Ton of 6" - 12" boulders, get 2 Tons of 12" - 18" boulders, 1 Ton of 18" - 24" boulders
Quantity of Boulders needed for a Hybrid Pond (RSVP Profile)
Tons of Boulders = Length x Width ÷ 80 (half as much because only one shelf is rocked)
Quantity of Boulders and Gravel for a Stream
Tons of Boulders = 1.5 Tons for every 10' of stream
Tons of Gravel = Tons of Boulders ÷ 4
Ratio of Sizes of Boulders*
For every 1 Ton of 6" - 12" boulders, get 2 Tons of 12" - 18" boulders, 1 Ton of 18" - 24" boulders
