Matanuska-Susitna Borough

Plans > Big Lake LMP

This Lake Management Plan implements many of the specific goals and recommendations identified in the [Big Lake] Comprehensive Plan.

*For a summary of lake use specifics, see page 1 of the LMP Summary under Documents

**Documents are not compatible with all system viewers; please use Adobe

Plan Overview

Big Lake occupies an area of approximately 3, 085 acres with a total shoreline length of approximately 31 miles. The lake consists of an east and west basin of near equal size and has a total of 22 islands. At its northeast end, Big Lake is connected by a narrow channel to Mud Lake (a.k.a. Mirror Lake) which in turn connects directly to Flat Lake. Mud Lake has a surface area of approximately 53 acres and a shoreline length of 1.5 miles; Flat Lake's surface area is approximately 317 acres, with a shoreline length of 5.4 miles.

Surface elevation of Big Lake is approximately 144 feet above sea level. The lake level is controlled by the ADF&G at a concrete weir at the Fish Creek outlet. Mean lake depth is 29 feet and the maximum depth is 88.6 feet (Woods, 1992). The total lake volume of Big Lake at full pool elevation is about 90,628 acre-feet. (information may not be current; taken from pg. 16 of the Big Lake LMP)