Scour Protection for Dam Number 2, Arkansas River, Arkansas. Hydraulic Model Investigation
Abstract
Tests were conducted on a 1:36-scale model of Dam No. 2, Arkansas River, to determine a method to prevent additional scour upstream and downstream from the structure and protect these areas from Dow conditions resulting from gate misoperation, vandalism, debris passage, and navigation accidents. The model reproduced 600 ft of topography upstream from the dam, the entire spillway and stilling basin, the proposed scour protection material, and approximately a 1,200-ft length of the channel downstream from the stilling basin. A navigation accident in December of 1982 severely damaged the scour protection upstream and downstream from the dam. Initial model tests were conducted to determine the degree of scour protection provided by the riprap used to repair the damaged areas after the accident. Tests were then conducted to develop scour protection for flow conditions resulting from operations with a single gate fully open, the normal upper pool, elevation (el) 162 ft referred to the National Geodetic Vertical Datum, and the minimum anticipated tailwater, el 113. A secondary stilling basin that performed satisfactorily was developed for these flow conditions, but construction was not feasible. There was concern that the project could not be dewatered, and the method of scour protection determined from the model would have to be constructed underwater. (Continued) Arkansas river, Riprap, Hydraulic model, Scour protection. Navigation dam.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 01, 1993
- Accession Number
- ADA269948
Entities
People
- John E. Hite Jr.