Accession Number:

ADA130646

Title:

Arkansas River and Tributaries Arkansas and Oklahoma. Toad Suck Ferry Lock and Dam, Conway Water Supply Foundation Report.

Descriptive Note:

Final rept. 1980-1982,

Corporate Author:

ARMY ENGINEER DISTRICT LITTLE ROCK ARK

Personal Author(s):

Report Date:

1983-06-01

Pagination or Media Count:

136.0

Abstract:

This report describes the foundation conditions encountered during the construction of a water supply dam for the city of Conway, Arkansas such to replace a previous water supply that was adversely affected by the construction of the McClellan-Kerr Arkansas River Navigation System. The dam was founded on a thick shale layer of the Atoka Formation. Locally, the shale was gray to black, hard to moderately hard, sandy, and well compacted. Excavation of a 10-foot wide centerline cutoff core trench in the shale posed no problems with standard earth-moving equipment. Pre-split blasting was required in excavating the outlet works stuctures and emergency spillway. The report gives the results of a well-point dewatering system installed in the valley section that did not function adequately, and methods to overcome ground-water flow at the rockoverburden contact. Foundation preparation and treatment consisted of washair jetting, mortared open joints, concrete fillets, and rock anchoring. The report details the installation of a grout curtain utilizing the stop-grouting, split spacing method.

Subject Categories:

  • Civil Engineering

Distribution Statement:

APPROVED FOR PUBLIC RELEASE