Accession Number:

ADA106343

Title:

National Dam Safety Program. Ni River Dam (Inventory Number VA 17701). Rappahannock River Basin. Spotsylvania County, Commonwealth of Virginia. Phase I Inspection Report.

Descriptive Note:

Final rept.,

Corporate Author:

BAKER (MICHAEL) JR INC BEAVER PA

Personal Author(s):

Report Date:

1981-05-01

Pagination or Media Count:

95.0

Abstract:

Ni River Dam, also referred to by the Soil Conservation Service SCS as the Ni River Watershed Project, Multiple Purpose Dam No. 1, is a zoned earthfill embankment approximately 50.9 feet high and 1440 feet long. Using the Corps of Engineers screening criteria for initial review of spillway adequacy, the 12 Probable Maximum Flood 12 PMF was selected as the spillway design flood SDF. The spillway is capable of passing up to 100 percent of the SDF or 80 percent of the Probable Maximum Flood PMF without overtopping the dam. The spillway is adjudged as adequate. The marshy area below the toe should be examined at regular intervals and after periods of heavy rainfall for flow or turbidity. If flow or turbidity are noted, a qualified geotechnical firm should be retained to further evaluate the condition.

Subject Categories:

  • Hydrology, Limnology and Potamology
  • Civil Engineering

Distribution Statement:

APPROVED FOR PUBLIC RELEASE