National Dam Safety Program. Lancaster City Dam (MO 10851), Mississippi - Salt - Quincy River Basin, Schuyler County, Missouri. Phase I Inspection Report

摘要

The Lancaster City Dam is located near the headwaters of the North Fork of the Middle Fabius River. The main purpose of the dam is to impound water for recreational use and a supplemental water supply. The crest of the dam is protected against surface erosion by a cover of grass and clover. There was no evidence of significant settlement or cracking on the crest. No deviations in horizontal or vertical alignment were apparent. Some evidence of rodent activity was observed on the embankment. There was no evidence of the dam ever being overtopped. The upstream slope was protected by concrete rubble riprap to one foot above the water surface. Considerable erosion due to wave action above the riprap indicates the riprap might have been placed after construction of the dam. Scarps ranging from 1 to 3 feet high have been cut into the upper part of the upstream face. Several bushes and small trees were growing on the upper grass covered slope. No bulges or depressions in the slope were observed.