Source | Denotation | Dam and year of completion | Country | Performance record |
Rönnqvist and Viklander [14] | A | Hytteljuvet (1965) | Norway | Muddy discharge upon first filling and subsequently over time, and a sinkhole incident in 1972. Exploratory borings showed locally large flows [32] [33] . |
L | Lövön (1973) | Sweden | Sinkhole incidents in 1983 and 1986. Investigations showed a loss of fines in the core, loose zones, cavities and elevated pore pressures, as well as signs of suffused and piped core materials and clogging of fines against the filter face [4] [34] . | |
N | Viddalsvattn (1971) | Norway | Increased seepage flow with muddy discharge upon first filling and subsequently over time and a sinkhole incident in 1973 [35] . | |
P | Porjus (1975) | Sweden | Sinkhole incident upon first filling and sinkhole incidents in 1979, 1985 and 1993 with increased seepage flow. Investigations showed erosion of the core and high pore pressures in the filter [4] [36] . | |
S | Songa (1962) | Norway | Muddy discharge in 1991 and settlement on the crest. Investigations showed loose zones in the core and zones of water loss [37] . |