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Date: April 25, 1995
Author: Jeff Fisher, Vice President
Subject: Raw Water Intake Pipeline Anchor Project
Description of Problem: Secure underwater 16" steel pipe in
the Ohio River.
Site / Design Conditions: Depth of water approximately 10-15 ft.,
variable river current: 1-3 knots, visibility: semi-turbid 1-2 ft., silty sand gravel soil conditions. Design engineers:
Howard K. Bell, Construction Engineers., Inc. of Lexington, Kentucky, called for a pipe anchor system (saddle and
two anchors) to complement sand bags. Holding requirement of 10 kips per anchor point.
Proposed Solution / Selected Solution: Five anchorage assemblies
spaced every 10 ft., each anchor driven to 7 ft., load locked to 10 kips per drawings and specifications of contract.
American Inland Marine, Inc. from Columbus, Ohio, were awarded the installation contract. Note: each anchorage
assembly consists of 2 anchors, anchor rods, extensions, hardware and 1 pipe saddle.
Anchors: 10 MANTA RAY® MR-2 anchors, 5 stainless steel 16"
pipe saddles, 10 SAR-10A galvanized anchor rods, 10 C-1 galvanized couplers, 10 pieces stainless steel all thread
3' x 1" all thread, 10 stainless steel nuts and washers.
Installation Equipment:
- (1) Stanley BR-87 u/w jack hammer
- (2) Stanley HP-1 hydraulic power unit
- (3) LL-1M anchor locker
- (4) SGC-18 drive steel kit
Installation Notes: *All ten anchors driven and load locked successfully per specification by commercial
divers.
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