Attachment I - 20Aug20_Industry Day Presentation.pdf

Modifications to Comanche Dam Market Research/Industry Day Presentation

W. W. Wheeler & Associates, Inc.

Schnabel Engineering

Engineering Solutions, LLC August 20, 2020

Presentation Outline Introductions General Project Information Location & Site Access Scope of Work Overview Drawing Review Bid Tab Review Key Specifications

Immersion Vibrated RCC Schedule Informal Questions & Discussion What’s Next

Important Note:

All information, questions and response will be considered informal and market research. A formal USFWS Solicitation is scheduled to be available in September.

Introductions U.S. Fish and Wildlife Services (FWS):

● Ray Fletcher – Contracting Officer

● Dave Hibbs – Contracting Officer Representative

● Brad Iarossi, P.E. – Chief, Dam, Bridge & Seismic Safety Branch

● David Farmer – Wichita Mountains Wildlife Refuge Manager

Engineers and Government Inspector

● Steve Jamieson, P.E. – Project Manager (Engineer of Record)

● Jesse Wullenwaber, P.E. – Project Engineer (Schnabel)

● John Treacy, P.E. – Project Engineer (Wheeler)

● Christine Mugele, P.E. – Hydraulic & Hydrology Engineer (Wheeler)

● Dan Hertel / Dave Hardy – Construction Cost Expert (Engineer Solutions)

● Government Inspector – Representative from Wheeler or Schnabel

Introductions (con’t) Contractors in Attendance:

● NW Construction

● Gears Inc.

● SEMA Construction

● ESCO Construction

● Kiewit Infrastructure So

● Thalle Construction

● Garney Construction

● Barnard Construction Company

● Ames Construction Aggregate Suppliers Used for Schnabel Mix Design: Martin Marietta

General Project Information Project Objective:

● Modify Comanche Dam to address to reduce the risk and hazard associated with the dam

Formal Bidding Schedule:

Solicitation – beta.SAM.gov –September 2020 On-site Pre-bid Meeting – October 2020

Process to be determined due to COVID restrictions

Bid Due Date – November 2020

General Project Information (con’t) Project Construction Schedule:

● November 15, 2020 to April 1, 2020

Comanche Dam Existing Features

1. Concrete gravity dam

2. Constructed in 1934

3. Height: 39 feet

4. Crest Length: 375 feet

5. Crest length: 375 ft

6. Normal Storage: 45 acre-feet

Emergency Spillways

Dam Crest

Combined Service Spillway and Low-level Outlet

Upstream Face

Downstream Face

Grama Dam Existing Features

● Homogeneous Embankment dam

● Constructed in 1936

● Height: 44 ft

● Crest length: 1,044 ft

● Normal Storage: 686 acre-feet

Emergency Spillway

Dam Crest / Access Road

Approx. Low-level Outlet

Emergency Spillway Control SectionRock Quarry

Location & Site Access

Location & Site Access (con’t)

Rock Quarry at Grama Dam

Potential Rock to Use

Comanche Access Road

Comanche Dam

PHOTO 1

PHOTO 2

Comanche Access Road

PHOTO 3

PHOTO 4

Comanche Dam

Comanche Access Road + Staging Area

6PHOTO 5

PHOTO 6

Comanche Dam

Staging Area

Staging Area

Comanche Access Road + Staging Area

PHOTO 7

PHOTO 8

Comanche Dam

PHOTO 9

Staging Area

Staging Area

Staging Area

Main N-S Access Road + Gate

PHOTO 11

Refuge Headquarters

PHOTO 10 Comanche Dam

PHOTO 12

Scope of Work Overview

● Improve and maintain access roads

● Site demolition existing handrails, upstream face ladder, vibrating wire piezometers, outlet works retaining wall, and top 2.9 feet of the center auxiliary spillway crest.

● Protect existing features water level sensor service spillway inlet structure and outlet works slide gate and operator; and left auxiliary spillway section.

● Perform dewatering and water control

● Excavate to bedrock

● Complete cleaning and preparation of the D/S dam face and foundation.

● Slip line and extend the low-level outlet works

● Construct a new downstream RCC buttress from the foundation to the crest of Comanche Dam.

● Reconstruct the center auxiliary spillway crest.

● Install new galvanized handrails and access ladders on the non-overflow crest of Comanche Dam.

Drawing Review

Drawing Review: Site Access, Staging, Stockpiling

Drawing Review: Existing Plan

Drawing Review: Plan of Modifications

Drawing Review: General Sections

Drawing Review: General Sections (con’t)

Immersion Vibrated RCC

• The objective of IV RCC is to have one operation with no separate facing mixes or operations

• Schnabel is finishing a lab mix design this week

• A retarder will be included to minimize cold joints

• Some of the keys to successful IV RCC will be

• Ensuring that the gradation is correct as specified

• Getting the paste content dialed in during the test section

Immersion Vibrated RCC

Click for 3D PDF Version

Drawing Review: Clearing and Grubbing

Drawing Review: Demolition Plan

Protect – Gate Operator / Monitor Equip

Demolish – Handrails Protect –

Benchmark

Demolish – Piezometer, cables and readout box

Demolish – Abandoned LLO and Retaining Wall

Demolish – Access Ladder

Demolish – 2.9 feet of auxiliary spillway

Protect – Left Auxiliary Spillway and Retaining wall

Drawing Review: HDPE Slip-line / Extend

Drawing Review: Excavation Plan

Drawing Review: Dowel Plan

Drawing Review: Joint Drainage Plan

Drawing Review: Details

Bid Tab Review

Key Specifications Section 01 11 00 Summary of Work:

● Fire Insurance coverage for duration of the Project to include all public and private property damage and loss of a minimum of ten million dollars ($10,000,000)

Section 01 14 00 Work Restrictions:

● No Camping or Recreating in Work Site Area

Section 01 31 00 Project Management and Coordination:

● Project Management Submittal with Bid

Proposed Schedule Resumes for Project Manager, Site Superintendent and Safety Officer Resumes for RCC Superintendent and Batch Plant Operator Resumes for Grouting Supervisor

Key Specifications (con’t) Section 01 33 00 Submittals:

Section Name Reference Section

Submittals Required

Due Date or Delivery Time

Project Management and Coordination

01 31 00 Project Management Submittal Submitted with Contractor’s Bid

Construction Progress Documentation

01 32 00 Project Construction Schedule Submitted with Contractor’s Bid

Construction Progress Documentation

01 32 00 Update 3-Week Look-Ahead Schedule

Prior to each weekly Project Progress Meeting

Submittal Procedures 01 33 00 Guarantees, Warranties, Certifications

Before Final Payment

Submittal Procedures 01 33 00 Delivery Tickets Within 24 hours of delivery Safety Procedures 01 35 00 Site Health and Safety Plan Prior to Site Mobilization Regulatory Requirements 01 41 00 Project Permits Prior to Site Mobilization Quality Control 01 45 00 Testing Results Within 1 day of completion Construction Facilities 01 52 00 Pre-Construction Video Within 7 days of Site

Mobilization

Section Name Reference Section

Submittals Required

Due Date or Delivery Time

Construction Facilities 01 52 00 Construction Site Layout Plan Prior to Site Mobilization

Temporary Controls 01 57 00 Temporary Reservoir Control Plan Prior to Site Mobilization Temporary Controls 01 57 00 Dewatering Plan 7 days prior to excavation Reclamation 01 74 00 Reseeding Submittal 30 days prior to start of reseeding Closeout Procedures and Submittals

01 77 00 Project Red-Line Record Drawings Prior to final payment

Surveys 02 21 00 Surveyor Qualifications 10 calendar days prior to survey work

Surveys 02 21 00 Quantity Survey 10 calendar days prior to survey work

Surveys 02 21 00 Survey Field Notes or Electronic Files

The day following field work

Section Name Reference Section

Submittals Required

Due Date or Delivery Time

Surveys 02 21 00 Existing Survey Prior to start of HDPE liner and RCC Work

Surveys 02 21 00 Record Survey Prior to final payment Demolition 02 41 00 Demolition Plan 14 days prior to removing or saw-cutting concrete

Concrete Accessories 03 15 00 Drain Pipe Data 14 days prior to first concrete or RCC placement

Concrete Reinforcing 03 20 00 Concrete Reinforcement Dowels and Drilled Anchors Shop Drawings and Mill Test Reports

14 days prior to fabrication

Cast-in-Place Concrete 03 30 00 Concrete Mix Design 21 days prior to first concrete placement

Cast-in-Place Concrete 03 30 00 Mass Concrete and Dental Concrete Mix Design

21 days prior to first concrete placement

Section Name Reference Section

Submittals Required

Due Date or Delivery Time

Roller Compacted Concrete

03 37 23 RCC Submittal 21 days prior to first RCC placement

Structural Metal Framing 05 10 00 Miscellaneous Metalwork Submittal 21 days prior to fabrication

Erosion and Sedimentation Controls

31 25 00 Stormwater Pollution Prevention Plan

Prior to Site Mobilization

HDPE Outlet Conduit Extension

33 05 33.53 Outlet Conduit Liner Submittal 21 days prior to delivery

Section 01 41 00 Regulatory Requirements:

● The Government is obtaining the following permits for this Project:

A Nationwide 404 Permit from the U.S. Army Corps of Engineers.

A National Environmental Policy Act (NEPA) Categorical Exclusion U.S. Fish and Wildlife Endangered Species Section 7 Clearance State Historical Preservation Office (SHPO) Clearance

● The Contractor is responsible for all federal, local and state permits other than the above. At a minimum will have to provide:

A General Construction Permit (OKR10) for Stormwater Discharge from the

Oklahoma Department of Environmental Quality.

Any Temporary Construction Permits as required by Comanche County.

● No construction permits are required from the Wichita Mountains Wildlife Refuge.

Section 01 45 00 Quality Control:

● Government Testing :

Perform additional laboratory tests on cast-in-place concrete, RCC, and earthwork materials.

Cast in place: Temperature, Slump, Air content, Admixtures, Time of Sample, location, cylinders, truck number, batch ticket RCC Test Section: Perform two field density tests per RCC lift by the nuclear method in accordance with ASTM D2922; set of five 6-inch-diameter RCC cylinders for each RCC lift; Vebe test of the RCC mix prior to each shift;

Concrete Reinforced: Perform inspection of foundation, formwork, and reinforcement placement

● Contractor Testing:

Aggregate Testing: Two (2) tests on proposed source sampled at the stockpile;

Every 500 cubic yards produced.

RCC Test Section: Provide batch tickets for each batch of RCC, or proportions for each 15-minute interval for continuous mix type plants.

Batch Plant: at the beginning of each construction season and at least once per week

Section 01 55 00 Vehicular Access and Parking:

● No clearing, grubbing, or grading in the staging and stockpile areas

● The existing gate entrance to the access road from Highway 49 shall be closed and locked at all times. The contractor shall provide a separate lock to implement a double lock system for access.

● The existing access road travel surface shall be a single lane no wider than fourteen feet.

Section 01 57 00 Temporary Controls:

● Full control of day-to-day operations of outlet works at Grama Lake and Comanche Lake.

Section 01 57 00 Temporary Controls:

Comanche Dam Combined Service spillway and low level

Control Gate for low level outlet

Grama Dam service spillway

Grama Dam low level outlet works control gate tower

Uncontrolled Service Spillway (w/ Trash Rack)

Section 03 20 00 Concrete Reinforcing:

● Perform Tension Tests on at least 10% of the installed dowels in the presence of the Government Inspector, in accordance with ASTM E 488.

● Provide up-to-date calibration records to the Government Inspector prior to each proof test.

● Dowels shall be loaded to 80% of the tensile capacity of the bar.

● Dowels will be considered to have failed if outward movement of anchorage in excess of the calculated elastic elongation of the bar at the test load level occurs and the displacement continues to occur at sustained loading below the tension specified.

Section 03 37 23 Roller-Compacted Concrete:

● RCC Mix Design is currently being tested in the lab, but will be similar this:

● Vebe time between 8-12 seconds

● The RCC mix will be Immersion Vibratory RCC (IVRCC). Contractor shall be aware of the properties of a low Vebe time mix that is retarded from initial set for 18 hours. Formwork and compaction equipment should be selected based on this type of RCC mix.

● Capacity: The mixing, placing, compaction, and cleanup systems shall have a capacity of at least 75 cubic yards per hour average production rate.

● Location: The plant and aggregate stockpiles shall be in areas jointly established by the Contractor, Contracting Officer’s Representative, and Government Inspector in the field.

● A continuous mix plant shall be set up on-site or near the site and be capable of producing a uniform continuous

● Internal immersion-type vibrators shall be used to consolidate the RCC against surfaces and to mix the grout with the uncompacted RCC where grout enriched is called out.

● 90 compressive strength of RCC < 3,000 psi

● Engineer will perform nuclear density tests, Vebe time tests, and will prepare RCC test cylinders for comparison with the RCC Mix Design Report.

● RCC temperatures between 40 degrees and 70 degrees.

● Structural concrete: 4,500 psi at 28 days

● Mass concrete: 2, 000 psi at 28 days

Schedule

Informal Questions and Discussions

What’s Next ?

● Look for the Solicitation Next Month