Table 3. Measurements and approximate slag volumes and weights from a sample of slag mounds in the Bagbaya vicinity.

Site	Length (m)	Width (m)	Height (m)	Surface area (m2)	Volume (m3) a	Weight (kg) b
BB01	18	14	1.50	189	98	109,760
BB04	17	16	2.00	204	163	182,560
BB05	17	20	1.75	255	154	172,480
BB07	12	8	1.50	72	39	42,680
BB09	14	14	1.25	147	62	69,440
BB10	20	16	2.50	240	208	232,960
NG01	12	12	1.75	108	63	70,560
OB02	14	12	1.50	126	62	69,440
Means	16	14	1.72	168	106	118,720

^aTruncated cone volume (π × h × [R² + r² + R × r]/3) multiplied by .80 as sand, roots, etcetera in the tested mounds make up approximately 20% of the matrix.

^bBased on an air-cooled iron slag weight of 1120 kg/m³ [cf. 56].