Holdenville Lake Expansion Project

Holdenville Lake Expansion Program Lake Expansion Project

Status

Bidding Closed

Prebid Date2/21/19 1:30pm

Bid Date3/19/19 3:00pm

Company & Contacts

Tetra Tech

Lisa Vargo (lisa.vargo@tetratech.com)   918-249-3909

Project Synopsis

HOLDENVILLE LAKE EXPANSION and RAW WATER INTAKE TOWER IMPROVEMENTS
including COUNTY ROAD E. 136.5 RELOCATION, BRIDGE OVER EQUALIZATION CHANNEL & UTILITY

Brief Project Descriptions:
LAKE EXPANSION AND INTAKE TOWER IMPROVEMENTS PROJECT. Construction of a new
earthen / concrete dam and appurtenances as authorized by Permit No. SWT-0-14595 issued by the U.S. Army Corps of Engineers, Tulsa District Regulatory Office. Work consisting of placement of fill material with conventional earthmoving equipment and heavy construction techniques to construct a new dam for the expansion of the existing Holdenville Lake by forming a reservoir on an adjacent tributary to the stream on which the existing Holdenville lake was created; and connecting the reservoirs by excavation of an equalization channel to form an interconnected lake. The new compacted fill and riprap dam structure is approximately 2,100 feet in length with maximum fill height of approximately 56 feet. Top of dam crown width is 26 feet and base width is 470 feet at the deepest fill utilizing an earth fill volume of approximately 740,000 cubic yards constructed with a foundation cutoff trench, chimney drain, and a foundation trench drain. Approximately 575,000 cubic yards of unclassified excavation are associated with the auxiliary spillway, equalization channel, and dam foundation. On site borrow is anticipated from the new reservoir
footprint area. The principal spillway conduit provides for a controlled release from the new water supply
intake structure. The concrete water supply intake structure includes three slide gates for water supply to
the new service pump installed on the intake structure and connected to the existing raw water pipeline by
new 16-inch diameter discharge piping attached to the span bridge catwalk structure. The auxiliary spillway
structure for overflow conditions of the interconnected reservoirs will be constructed as a concrete Labyrinth
Weir with the new dam. The Labyrinth Weir will extend across 151 feet of chute width, is 9 feet tall, and
will discharge waters to 2 roller compacted concrete (RCC) drop structures composed of approximately
27,700 cubic yards of RCC material. With constructed wetlands, the equalization channel will be excavated
between the two reservoirs across a topographic saddle and existing County Road with a 20 foot bottom
width, 3H:1V sidewalls, maximum depth approximately 43 feet, and length of approximately 2,720 feet.
Raw Water Intake tower improvements include installation of appurtenances to the new concrete intake
structure for conveyance of raw water. New installation of 100 HP Vertical Turbine Pump, approximately
280 feet of 16 inch diameter pipeline mounted to intake structure access bridge, and electrical controls and
instrumentation.
Location of project is approximately 3.4 miles southeast of Holdenville, Oklahoma on State Highway 48;
primarily in Sections 28, 29, 32, and 33 of Township 7 North, Range 9 East. The approximate center of the
proposed dam is located at North Latitude: 35.0413, West Longitude: 96.3725.
Estimated Cost of Construction: $18,000,000.

COUNTY ROAD E. 136.5 RELOCATION, BRIDGE OVER EQUALIZATION CHANNEL & UTILITY.
Construction coordinated with the Lake Expansion Project to construct a Steel Arch bridge over the
equalization channel on alignment for relocation of the existing County Road 136.5. The county road
relocation is constructed of approximately 1,400 feet of compacted roadbed with 20 foot width of aggregate
surfacing to replace the existing gravel road and convey vehicles across the Steel Arch bridge spanning
the equalization channel excavation. The arch bridge is approximately 66 feet in length and 34 feet in width
with Mechanically Stabilized Earth (MSE) walls and wingwalls composed of modular blocks and tie-back
reinforcement. Bridge foundation is composed of a reinforced concrete footing founded on H-Piles driven
to competent rock below. Arch bridge is backfilled with drainable aggregate below the future water level
and granular backfill to the roadway surface elevation. Project includes relocation of approximately 1,500
feet of 4 inch, PVC, potable waterline adjacent to the alignment of County Road 136.5 relocation. Project
location is in Section 33, Township 7 North, Range 9 East across the equalization channel for the
interconnected lakes. Estimated Cost of Construction: $1,300,000.