MOUND LAKE. Mound Lake, also known as Navel Lake, is on the Terry-Lynn county line, ten miles east-northeast of Brownfield (at 33°14' N, 102°05' W). The lake is partially fed by the saline Mound Springs. The local terrain is flat to rolling with local escarpments. The fine sandy loam soils support only sparse brush and grasses. Heavy rains have caused many of the small intermittent streams that run into the lake to erode, and the lake bed is gradually filling with sediments.
Gunnar Brune, Springs of Texas, Vol. 1 (Fort Worth: Branch-Smith, 1981).