Salween. Rivers The chief river in the northern state, apart from the Salween, is the Nam Tu or Myitnge, which rises on the Irrawaddy- Salween watershed, not far from the latter, and flows westwards through the state into Taungbaing or Thibaw, and eventually into the Irrawaddy at Amarapura. The Nam Mao or Shweli only skirts the state, but it receives a considerable tributary, the Nam Paw, which has its entire course in Theinni territory, and is large enough to be barely fordable in the dry weather, and only passable by boats in the rains. The deforestation caused by years of upland cultivation has dried up many of the springs, but as a whole North Theinni is very well watered. Considerable deposits of coal, or rather of lignite, exist in both North and South Theinni, but do not appear to be of high quality. Gold is washed in many of the streams in a fitful way. Limestone exists in large quantities. No valuable timber exists to any considerable extent. Vegetation There is some teak in the Nam Yao valley, and scattered wood-oil trees exist. Pine forests cover some of the ranges, but, as elsewhere in the Shan states, varieties of the oak and chestnut are the commonest forest trees. Climate The climate of the state as a whole is temperate. In the plains of the uplands there are yearly frosts in January, February and March, but in the greater part of the state the thermometer rarely falls to freezing-point, and in the hot weather does not exceed ninety degrees for any length of time. The average rainfall seems to be about yearly. Notes External links Satellite map GeoNames Populated places in Shan State Former states of Myanmar Township capitals of Myanmar