Mini-Pit Dimensions and Storage Volumes

Table 1. Mini-pit dimensions and storage volumes
(see Figure 1 for location of dimensions).

(Assumptions: 3 ft³/cow/day; 6 inch free board)

Table 1a.
Depth, D = 3 ft
Ramp Length (RL) = 30 ft.

Width, W (ft)	Bottom Length, BL (ft)	Total Length (ft)	Storage Volume (ft³)	Storage for 100 cows (days)
24	20	50	2,100	7.0
.	40	70	3,300	11.0
.	60	90	4,500	15.0
36	20	50	3,150	10.5
.	40	70	4,950	16.5
.	60	90	6,750	22.5

Table 1b.
Depth, D = 4 ft
Ramp Length (RL) = 40 ft.

Width, W (ft)	Bottom Length, BL (ft)	Total Length (ft)	Storage Volume (ft³)	Storage for 100 cows (days)
20	40	80	4,200	14.0
.	60	100	5,600	18.7
24	20	60	3,360	11.2
.	40	80	5,040	16.8
.	60	100	6,720	22.4
.	80	120	8,400	28.0
36	20	60	5,040	16.8
.	40	80	7,560	25.2
.	60	100	10,080	33.6
.	80	120	12,600	42.0
.	100	140	15,120	50.4

Table 1c.
Depth, D = 5 ft
Ramp Length (RL) = 50 ft.

Width, W (ft)	Bottom Length, BL (ft)	Total Length (ft)	Storage Volume (ft³)	Storage for 100 cows (days)
20	20	70	4,050	13.5
.	40	90	5,850	19.5
.	60	110	7,650	25.5
24	20	70	4,860	16.2
.	40	90	7,020	23.4
.	60	110	9,180	30.6
.	80	130	11,340	37.8
36	20	70	7,290	24.3
.	40	90	10,530	35.1
.	60	110	13,770	45.9
.	80	130	17,010	56.7
.	100	150	20,250	67.5
.	120	170	23,490	78.3

Table 1d.
Depth, D = 6 ft
Ramp Length (RL) = 60 ft.

Width, W (ft)	Bottom Length, BL (ft)	Total Length (ft)	Storage Volume (ft³)	Storage for 100 cows (days)
24	40	100	9,240	30.8
.	60	120	11,880	39.6
.	80	140	14,520	48.4
.	100	160	17,160	57.2
36	40	100	13,860	46.2
.	60	120	17,820	59.4
.	80	140	21,780	72.6
.	100	160	25,740	85.8
.	120	180	29,700	99.0
.	140	200	33,660	112.2

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