Attachment A CelinaSaddleU38Specifications.pdf

SADDLE LAKE SLIDE GATE REPLACEMENT

PROJECT SPECIFICATIONS – Revised 5/10/2015

CELINA DAM STRUCTURE #1 VALVE REPLACEMENT

PART 1 – GENERAL

1.1 CONDITIONS

A. The equipment provided under this specification shall be fabricated, assembled, erected, and placed in proper operating condition in full conformity with the drawings, specifications, engineering data, instructions and recommendations of the equipment manufacturer unless exceptions are noted by the engineer.

B. The Contractor shall furnish and install the following Stainless Steel slide gate assemblies as listed in the Materials specification. The Stainless Steel slide gate assemblies shall include the gate, frame, stem, stem guides, wall bracket and lift. Stainless Steel slide gates and installation shall meet the requirements of AWWA C561 except as modified herein.

C. Gates and operators shall be supplied with all the necessary parts and accessories indicated on the drawings, specified or otherwise required for a complete, properly operating installation, and shall be the latest standard product of the manufacturer regularly engaged in the production of fabricated gates.

1.2 SECTION REQUIREMENTS

A. Valve Systems and Rising Stem Operator Systems:

a. Celina and Saddle Lake Dam: Remove existing gate valve systems in the “wet” chamber; install new stainless steel sluice gate with wide flange and rising stem operator system in the “wet” chamber on the downstream wall where existing valve is.

b. U38 Dam: Secure valve assembly to the primary spillway riser walls.

B. Trash Racks: Replace all trash rack grating and angles, including hardware, removed to access the structure and valve assembly.

C. Work will require Confined Space Entry. Contractor to comply with all OSHA requirements for this entry. Workers must be able to show certification in confined space entry.

1.3 SUBMITTALS

A. The contractor shall submit for approval by the COR, drawings showing the principal dimensions, general construction and materials used in the gate and lift mechanism.

a. Manufacturer’s information, specifications, and data showing dimensions, materials of construction, and weight of all major items of equipment.

b. Installation diagrams showing location, arrangement, and size of all fasteners required for the equipment.

c. Setting drawings, templates, and instructions for installation of frames, etc.

d. Certification that all components were designed based upon the maximum seating and unseating heads described herein.

1.4 PERFORMANCE

A. Leakage

a. Sluice gates shall be substantially watertight under the design head conditions.

Under the design seating head, the leakage shall not exceed 0.05 U.S. gallons per minute of seating perimeter. The design seated head: Saddle Lake Dam 30, Indian & Tipsaw 27’-6”.

B. Field Test

a. After installation and before the gates are put into operation, a leakage test shall be performed on all slide gates in accordance with AWA C561. Excess leakage shall be reduced to the maximum by adjusting the gate, frame and seals.

1.5 WARRANTIES

a. Provide standard manufacturer’s written warranty, without monetary limitation, signed by manufacturer agreeing to promptly repair or replace products that fail in materials or workmanship for the period of one year. Provide one-year workmanship warranty for installation.

PART 2 – PRODUCTS

2.1 MATERIALS

A. Complete 20”x 20” Model HG560 Heavy Duty slide gate wall mounted, non-self-contained or approved equal, stainless steel sluice gate, extra wide flange, including frame, guides and slide seals, compression cord, bottom seal, slide, top seal, yoke and necessary parts and accessories. Gate shall be fastened to the concrete structure with stainless steel anchor bolts as recommended by the manufacturer for this installation.

Design Seated Head (feet) As-Built Gate Size (inches) Celina Lake 55 20 x 20 Saddle Lake 30 18 x 18

Hydro Gate 12000 East 47th Ave., Suite 200 Denver, CO 80239 Toll Free: (800) 678-8228 Phone: (303) 288-7873

a. STANDARD MATERIALS GATES:

1. Frame, Slide, Yoke, and Reinforcing: Stainless Steel, ASTM A240/A240M, Type 304L, or ASTM A240/A240M, Type 316L

2. Stainless Steel for stems: ASTM A-276, Type 304.

3. Stainless Steel for fasteners: F-593/F-594, Alloy Group 1, 2 (SS304, SS316)

4. Invert seals and compression load pad: Neoprene, ASTM D2000, 60 Durometer, with a stainless-steel ASTM A276, Type 304L, or Type 316L retainer bar.

5. Side Seal: Ultra High Molecular Weight (UHMW) Polymer, ASTM D4040

6. Top Wedges: Type 316 Stainless Steel ASTM A351-CF8M

a. Slide The slide shall consist of a flat plate reinforced with formed plates or structural members to limit its deflection to 1’720 of the gate’s span under the design head.

b. Frame, Guides and Seals The gate frame shall be constructed of structural members or formed plate welded to form a rigid one-piece frame. The frame shall be of the flange back design suitable for mounting on a concrete wall with extra-wide flange. The guide slot shall be made of UHMW (ultrahigh molecular weight) polymer.

The guides shall be made of UHMW (ultrahigh molecular weight) polymer and shall be of such length as to retain and support at least two thirds (2/3) of the vertical height of the slide in the fully open position.

Side and top seals shall be made of UHMW (ultrahigh molecular weight) polymer of the self-adjusting type. The sealing system shall maintain efficient sealing in any position of the slide and allow the water to flow only in the opened part of the gate.

The bottom seal shall be made of resilient neoprene set into the member of the frame and shall for a flush-bottom.

c. Yokes Yokes of self-contained gates shall be provided with a yoke made of structural members or formed plates. The maximum deflection of the yoke shall be 1/360 of the gate’s span.

B. Hydro Gate Pedestal mounted hand wheel lift, CPS2, with Type 304 Stainless Steel Stem and plastic stem cover with mylar position indicator (or approved equal).

a. Stem and Stem Splices

Stems shall be manufactured from stainless steel sized (min. 1-1/2” dia.) to withstand the axial compressive and tensile forces created during gate operation under the specified unbalanced heads and to transmit in compression at least two times the rated output of the lift with a 40-lb effort on the crank or hand wheel.

Threading on stems shall be rolled with double-lead threads of the Acme type.

Cut threads will not be allowed. The contact surfaces of the threads shall have a maximum 16 micro-inch finish. Stem couplings shall have internal threads for transmitting the full thrust of the stem and shall be held in place on the stem with a key, simultaneously engaging the coupling and both stems.

b. Stem Guides Stem guides shall be Type “B” and collar with red head self-drilling cinch anchors with ¾” dia. X 3” stud (ST) bolt and 2 hex nuts (or approved equal. The stem guides shall be properly spaced to support the stem as a long column, with maximum spacing not to exceed and l/r of 200.

c. Lifts Manual Lifts – Pedestal Hydro Gate CPS2 Cast Iron Type Geared Lift with crank, Type 304 Stainless Steel stem. The lifts shall be of the enclosed gear type with crank handle. Gears shall be steel with machine-cut teeth designed for smooth operation. The gearing and lift nut shall be mounted in a cast iron housing which, in turn, shall be supported by a cast iron or structural steel pedestal to place the input shaft approximately 36 in. above the floor. Lubrication fittings shall be provided in the gear housing to permit lubrication of all gears and bearings. A maximum effort of 40 lbs shall be required to operate the gate after it is unseated from its wedging devices. All rising stem gates shall be supplied with a clear plastic stem cover. Geared lifts shall be suitable for manual and portable motor operation. Lift nuts shall be high-strength bronze. Oil bath lubrication shall not be allowed.

d. Stem Covers Rising stem gates shall be provided with a plastic stem cover with mylar position indicator clear plastic stem covers that will not discolor, crack or become opaque for at least 5 years after installation. The covers shall be capped, vented, and long enough to allow full travel of the gate.

e. Fasteners All anchor bolts, studs, assembly bolts, cap screws, nuts, and adjusting screws shall be of ample section size to withstand the force created by operation of the gate under full heads of water specified and shall be stainless steel.

f. Wall Bracket for Lifts

Indian and Tipsaw Lake Dams: Provide wall bracket for Tipsaw structure to mount the lift pedestal. Use Hydro Gate wall bracket recommended by the manufacture or “approved equal”. Use stainless steel bolts that penetrate the concrete wall with stainless nuts and washers, both brackets. Use the current Indian Lake bracket.

PART 3 – EXECUTION

3.1 REMOVAL

A. Remove and dispose of existing sluice gates and associated attachments including gates and stems.

B. The Contractor will be responsible for proper disposal of all material/debris, erosion control and discharge water quality during the duration of the contract.

3.2 INSTALLATION

A. All parts shall be installed and adjusted by the Contractor in a workmanlike manner.

The manufacturer shall furnish necessary drawings and detailed installation, operation and maintenance instructions for all components. It shall be the Contractor’s responsibility to handle, store, and install all parts controls in accordance with the manufacturer’s detailed written recommendations. Stem threads shall be lubricated prior to operation of the gate.

B. Furnish and install fully functional sluice gate, stem, and riser per manufacturer’s recommendations and drawings enclosed. Sluice gate and riser to be modified, as needed, to match existing conditions.

C. Cleanup site and repair any erosion damage to adjacent area.

D. Provide “As Built” drawings of installation/equipment.

E. All dimensions in this contract have been taken from As Built Drawings and original plans. It is the contractor’s responsibility to field-verify dimensions.

F. Damage to existing structure and facility, including rutting of the dam surface, will be repaired at the contractor’s expense. Any rutting of the dam surface due to access shall be repaired by the Contractor’s expense