DRAFT SOW.docx

MMD Bridge Pier Repair 25020

Enumclaw, WA

SECTION 01 11 00

STATEMENT OF WORK(October 1, 2025)

1.0 DESCRIPTION OF WORK

Provide all design analysis, design solutions, as-built drawings, equipment, supplies, labor, facilities, tools, materials, and construction execution and perform all work in strict accordance with this Statement of Work, the contract and specifications, all Federal, State and Local codes and regulations, and all applicable industry standards.

The MMD Outlet Works Bridge at Mud Mountain Dam is a two-span bridge that carries equipment and personnel over the discharge of the 9 ft tunnel for access to the 23 ft tunnel. Each span has two prestressed concrete girders with a CIP concrete deck. These spans are supported column at the center pier. Over time, the sediment-laden flow from the 9 ft tunnel has destroyed the stainless-steel pier nose guard and has eroded the concrete pier to a point where the rebar cage in the blast zone is fully exposed and undermined. The current estimate is that rebar is exposed/undermined along 65% of the pier’s perimeter over a height of 10-15 feet. The bridge was red tagged by the Bridge Safety team in 2022, disallowing use of the bridge to vehicle and foot traffic. (See Attachment 05 & Attachment 10)

The word “Provide” shall be defined as PLAN, FURNISH, INSTALL, TEST and MAKE READY FOR USE.

Project Objective/Purpose: The work to be performed under this contract will be performed at the Mud Mountain Dam. U.S. Army Corps of Engineers, Seattle District, 30525 SE Mud Mountain Dam, Enumclaw, WA 98022.

The U.S. Army Corps of Engineers (USACE) is planning to hire a contractor to repair the maintenance bridge pier in the White River, located downstream from the MMD. The estimated time for these important repairs is approximately 22 to 24 weeks. To minimize environmental impact during the project, USACE will work closed with GC to implement specific strategies throughout the repair process. The repair work will be divided into three constructive phases:

1. Above the Water: This phase will involve the use of a New concrete Crane Pad and bridge to facilitate operations.

2. At the Water's Surface: Small watercraft maybe will be utilized for tasks conducted at this level.

3. Below the Water's Surface: Divers may be engaged as needed to carry out work beneath the water.

These carefully planned phases aim to ensure both the integrity of the bridge and the preservation of the environment. More detailed information about the project will be shared in the following sections.

value engineering design analyses and construction management support. This includes as-built drawings, equipment, supplies, labor, facilities, tools, materials, and supervision.

All work will be conducted in accordance with this Statement of Work, the contract specifications, and all applicable federal, state, and local codes and regulations, as well as industry standards.

1.1.1 General Construction Sequence:

· Site Preparation:

· Stabilize bridge (2 months).

· Excavate around the bridge pier to expose damaged area (2 weeks).

· Install secondary confinement around bridge pier (2 weeks).

· Removal of sediment curtain.

· Pier Repairs:

· Install new rebar (1 week).

· Prepare concrete surface (1 week).

· Install metal armoring to encase the bridge pier (2 weeks).

· Install waterproof seal between new steel armoring and existing concrete pier (3 days).

· Place concrete to restore pier (1 day to place, 1 week to cure).

Demobilization:

· Reinstall sediment curtain.

· Remove water from secondary confinement (if needed)(1 day).

· Remove secondary confinement (1 week).

· Remove bridge stabilization and place excavated sediment back around the pier (2 weeks).

1.1.2 Access, Staging, and Disposal Areas:

Access, staging, and disposal areas are shown in Attachment 01. Access is available using existing roads and paths. Staging will occur on and around the dam, but primarily at the downstream end of the dam near a newly constructed crane pad adjacent to the 9-foot tunnel and the maintenance bridge. If a disposal area is needed for any sediment excavated from around the pier, it will be placed in a designated upland disposal area at MMD. Sediment disposal involves the contractor unloading dump truck loads into piles at the disposal area. The sediment will then be spread out and managed by operations staff. Materials not suitable for disposal at the onsite location (contaminated water, concrete, trash, metal, etc.) will be removed and disposed of at appropriate and permitted facilities.

1.1.3 Impact Avoidance and Minimization Measures:

Repairing the maintenance bridge pier is expected to take 22-24 weeks to complete. This is a conservative estimate, and the duration may be shorter if multiple repair steps occur concurrently or complete faster than estimated. All work, including in-water work, will be completed between March 1 and October 31, 2026. During work the 9-foot tunnel will be closed (i.e., not releasing water).

USACE uses the 23-foot tunnel as the primary discharge system between March 1 through June 30 to reduce injury and mortality of juvenile fish migrating downstream through the MMD. During this time the 9-foot tunnel is closed and only opens if absolutely necessary. Otherwise, under normal operations, the 9-foot tunnel can reopen after June 30 to flush sediment downstream. In 2026, USACE does not plan to reopen the 9-foot tunnel unless absolutely necessary after June 30 to avoid interrupting or damaging ongoing repair work to the pier. Once work is completed to the repair, normal operations can continue in time for peak flow season or any maintenance work. Peak flow events generally occur between November and March and both tunnels are needed in case of major flooding.

1.1.4 Impact Avoidance and Minimization Measures:

The following BMPs will be incorporated into the project to reduce environmental impacts of the action to ESA-listed species and designated critical habitat. Some are integrated into the repair, while others are guides to operation and care of equipment. These measures appear below:

· All construction activities will occur during daylight hours to minimize noise impacts to the surrounding community.

· To avoid or minimize noise impacts, all equipment and vehicles will have properly working mufflers and will be kept in a proper state of tune to reduce backfires.

· Access to the work site will be via existing roads.

· The work site shall be left in a clean and safe condition at the end of each shift. Debris, or other waste generated by the work shall be removed from the work site and disposed in a permitted location. After completion of the work, tools, appliances, surplus materials, temporary drainage, rubbish, and debris incidental to work shall be removed and disposed in a permitted location.

· Equipment will be cleaned prior to construction so that it is free of external petroleum-based products and any invasive noxious weeds. Accumulation of soils or debris will be removed from all construction mechanisms and the undercarriage of equipment prior to its use.

· There will be no discharge of oil, fuels, or chemicals to surface water or onto land.

· A spill containment kit, including oil-absorbent materials will be kept on-site during construction in the event of a spill or if any oil product is observed in the water.

· If a spill were to occur, work will be stopped immediately, steps will be taken to contain the material, and appropriate agency notifications will be made. Staff will be trained on using the spill containment kit.

· In water work will coincide with closure of the 9-foot tunnel, which is typically closed between March 1 and June 30, and will remain closed until the project is completed (until as late as October 31) and the general in-water work window for the White River (July 15-August 31).

· Material placement into the water would be done in a controlled manner to reduce turbidity and in-water noise generation.

· All trash and unauthorized fill including concrete blocks or pieces, bricks, asphalt, metal, treated wood, glass, floating debris, and paper) generated during the repair would be removed from the project and staging areas after work is complete.

· The contractor will perform water quality monitoring for turbidity as outlined in the Water Quality Monitoring Plan. If potential exceedance is detected at the early warning sample locations, on-site personnel will evaluate construction activities and take measures to minimize turbidity generation. Examples include slowing down a specific in-water activity and changing the amount of material that is moved below the waterline.

· The work area will be isolated from the rest of the White River by a sediment curtain (during turbidity generating events) and the secondary containment (e.g., cofferdam).

· After the secondary confinement structure is installed, a qualified fish biologist will inspect the inside, capture any fish located inside, and release them outside of the work area (downstream of the sediment curtain) before work continues. Details of the fish rescued will be recorded (species, condition, size).

· If monitoring detects no exceedances to the water quality monitoring plan after 3 days of typical sediment excavation activities, the sediment curtain can be removed. However, water quality monitoring per the water quality monitoring plan will continue and if an exceedance is detected then the sediment curtain may need to be reinstalled to protect water quality.

· Temporary erosion control measures will be installed for all phases of work as required to prevent the discharge or accumulation of sediment into the river or off site. A Certified Erosion and Sediment Control Lead will choose and install erosion control materials for specific site conditions as necessary. These may include silt fencing, mats, blankets, check dams, bonded fiber matrix, and straw. Accumulation of sediment in any adjacent swales or storm drains will be monitored daily and cleared to ensure continued service throughout construction.

· Fueling will occur away from the river, and biodegradable hydraulic fluids will be used as appropriate in any portion of the equipment that will work in the water. A Fueling and Spill Recovery Plan will be developed prior to construction and will include specific BMPs to prevent spills and react quickly should a spill occur.

1.1.5 Finish Bridge Pier Improvements: North of the new upgrade concrete crane pad, the 9-foot tunnel will have its north concrete wall extended to meet the height of the new crane pad so a new catwalk can be placed across the tunnel outlet. A new prefabricated stair tower for accessing the 9-foot tunnel when the bulkhead is in place will be constructed. Other electrical, safety, and drainage improvements will be added as well.

1.2 Quality Control: The contractor shall develop and maintain an effective quality control program to ensure services are performed in accordance with this PWS. The contractor shall develop and implement procedures to identify, prevent, and ensure non-recurrence of defective services. The contractor’s quality control program is how the contractor assures that work complies with the requirement of the contract. The QCP is to be delivered digitally within 10 days after contract award. After acceptance of the quality control plan the contractor shall receive the contracting officer’s acceptance in writing of any proposed change to his QC system.

1.3 Quality Assurance: The government shall evaluate the contractor’s performance under this contract in accordance with the Quality Assurance Surveillance Plan. This plan is primarily focused on what the Government must do to ensure that the contractor has performed in accordance with the performance standards. It defines how the performance standards will be applied, the frequency of surveillance, and the minimum acceptable defect rate(s).

1.4 Recognized Holidays: The contractor will not be required to perform Work on holidays.

Independence 4 July Day

Hours of Operation: The contractor is responsible for conducting business, between the hours of 06:00 AM, and 16:30 PM Monday thru Friday except Federal holidays or when the Government facility is closed due to local or national emergencies, administrative closings, or similar Government directed facility closings. For other than firm fixed price contracts, the contractor will not be reimbursed when the government facility is closed for the above reasons. The Contractor must always maintain an adequate workforce for the uninterrupted performance of all tasks defined within this PWS when the Government facility is not closed for the above reasons. When hiring personnel, the Contractor shall keep in mind that the stability and continuity of the workforce are essential.

2.0 BACKGROUND

Provide for this project, improvements will be constructed to a crane pad at MMD. The physical address for Mud Mountain Dam is 30525 SE Mud Mountain Rd, Enumclaw, WA 98022. The bridge pier is located at the downstream end of MMD, support the steel bridge connect between the crane to the 9-foot tunnel outlet. It locates under the steel bridge of reinforced concrete vaults constructed in the 1940s as part of an originally planned fish trap facility (fishway). This fishway was never used and a fish trap and haul facility was instead constructed down-stream at the Buckley barrier dam. The fishway adjacent to the 9-foot tunnel was capped with a concrete pad and recently upgrade 2025. The bridge has since been used as a walkway connect between concrete pad to the tunnel for operation and maintenance at the MMD tailrace. The project Site Plan is identified in Attachment 02.

3.0 GENERAL REQUIREMENTS

The Contractor shall perform all work according to accepted industry standards, safety procedures, and applicable laws, regulations, codes, and standards to include, but are not limited to, the Unified Facilities Guide Specifications (UFGS), Unified Facilities Criteria (UFC), International Building Code (IBC),

3.1. Materials selected and installation procedures enacted shall be such that will provide a minimum service life of 20-25 years for the pier.

3.2. The contractor must comply with all current OSHA regulations and the requirements contained in Engineering Manual 385-1-1 US Army Corps of Engineers Safety and Occupational Health Requirements.

3.3. While onsite, contractors shall be easily identifiable to the government employees and the public. This can be achieved by wearing clothing with company logo, hardhats with company logo, vests with company logo, etc.

3.4. Materials Contractor shall maintain road access to the Dam Facility at all times. Full road closures will not be allowed. A traffic control plan shall be approved before work can start.

3.5. A designated staging area will be provided for the contractor to utilize during the performance of the contract. Staging area is identified in Attachment 01.

3.6. Contractor shall provide all resources required to perform the work including but not limited to bathrooms, electricity, and water.

3.7. Post Award Conference/Periodic Progress Meetings: The Contractor agrees to attend any post award conference convened by the contracting activity or contract administration office in accordance with Federal Acquisition Regulation Subpart 42.5. There will be one project kickoff meeting, occurring post award, that must be attended in person by the contractor. Thereafter, weekly status meetings will be held between the contractor and the Government. At these meetings, the team will apprise the contractor of how the government views the contractor's performance and the contractor will apprise the Government of problems, if any, being experienced. Appropriate action shall be taken to resolve outstanding issues. These meetings shall be at no additional cost to the government.

3.8. Key Personnel: The Contractor shall provide a contract manager who shall be responsible for the performance of the work. The name of this person and an alternate who shall act for the contractor when the manager is absent shall be designated in writing to the contracting officer. The contract manager or alternate shall have full authority to act for the contractor on all contract matters relating to daily operation of this contract. The contract manager or alternate shall be available between 7:00 a.m. to 5:30p.m Monday thru Friday except Federal holidays or when the government facility is closed for administrative reasons. Qualifications for all key personnel are listed below:

- Slava Govorushkin – MMD, HHD, LWSC, and PM (backup)

- Loc (Luke) Huynh – MMD & LWSC, and PM (backup)

- Emry, Rick – MMD Dam Maintenance Supervisor (on site backup)

- Heape, Kevin – MMD Operation Project Manager (OPM)

- Diddams Michael- MMD Technical Engineer Staff

3.9 Identification of Contractor Employees: All contract personnel attending meetings, answering Government telephones, and working in other situations where their contractor status is not obvious to third parties are required to identify themselves as such to avoid creating an impression in the minds of members of the public that they are Government officials. They must also ensure that all documents or reports produced by contractors are suitably marked as contractor products or that contractor participation is appropriately disclosed.

3.10 Special Qualifications: The All-contractor personnel performing maintenance, inspection, or repair services on the MMD for the Bridge Pier projects shall have the applicable licenses, certifications, or permits issued by the Washington State government. Any technician or permits issued by the Washington State government. Any technician or mechanic not possessing the proper credentials shall not be permitted to work on site.

4.0 PRINCIPAL ITEMS

4.1 Base Bid Item 0001 - All Work for Site Preparation- Mobilization and Demobilization:

· Work Mobilize equipment and material needed to complete all aspects of the project.

· Demobilization costs will also be captured under this CLIN.

4.2 Base Bid Item 0002 - All work Related to Shoring of the Existing Bridge:

· Remove Sediment around bridge pier

· Contractor isolate the pier from the White River using precast panels or steel plate and watertight seals to prevent impacting the White River (e.g., changes to water quality in the White River [turbidity, pH, etc.])

· Contractor shall remove all sediment around or any necessary materials around the pier according to the project plans.

· Contractor is responsible for disposal of all sediment accordingly to USACE environmental regulations at MMD.

· Contractor shall provide all materials and equipment necessary for filling the steel/ concrete casement around the pier with Controlled Density Fill (CDF) according to the project plans and specifications.

4.3 Base Bid Item 0003 - All work Related to Installing Steel/Concrete Casement:

· Contractor will provide all materials and equipment necessary for construction of the reinforced concrete bridge pier under the bridge connecting between the new concrete crane pad and the 9-foot tunnel.

· Contractor will provide all material and equipment necessary for repairing the concrete bridge pier with concrete pouring, steel rebars as well all necessary structural equipment to stabilize the pier and bridge during construction repair. It also will include proper design of the riprap system acts as a protective layer to resist high water flow velocities around the pier. Key design considerations like rocks size, filter layer, and slope angle etc.

4.4 Base Bid Item 0004 – Closed Out- Furnish As-Built Drawings:

· Commissioning - Inspection Corrections Turn over all As-Built Drawings to onsite COR/Project Engineer Full closure of the access roads to the bridge will not be permitted during the performance of this contract.

Images/Attachments:

· Attachment 01: Bridge Pier Disposal & Laydown

· Attachment 02: Project Site Plan

· Attachment 03: From Steel Bridge To Conc. Crane Pad

· Attachment 04: From Steel Bridge To Conc. Crane Pad

· Attachment 05: Bridge Pier Under Water

· Attachment 06: Bridge Pier Under water

· Attachment 07: View from Conc. Pad to Bridge Pier

· Attachment 08: View from Conc. Pad to Bridge Pier

· Attachment 09: Example of Water Being Released Towards Bridge Pier

· Attachment 10: Diagram Showing Bridge Pier’s Condition

· Attachment 11: Example of Sediment Curtain

· Attachment 12: Example of Bridge Stabilization

5.0 PRE-BID SITE VISIT

A pre-bid site visit/Industry Day for this contract is scheduled for September 2025. All interested parties must submit the required documentation for a background check to the Contracting Specialist and the Project Manager (PM) at least 24 hours before the site visit in order to register for it.

6.0 CONDITIONS AFFECTING WORK

6.1 Work Coordination: All work done in water is scheduled to occur during the in-water work window for the White River (July 15 to August 31). In-water work includes the installation of the steel panels. No other in-water work is planned.

6.2 The Contractor shall attend a kickoff meeting prior to commencing any work activities. The Contractor shall contact the PM within five (3) days of award to set a date and time for the kickoff meeting.

The contractor must submit a detailed schedule that outlines all aspects of the work, including any special circumstances or conditions. This schedule should clearly identify project tasks, along with their durations, start times, and finish times. The contractor is required to present this schedule at the preconstruction meeting. Additionally, the contractor must provide a site-specific Accident Prevention Plan to the government construction representative for approval before any construction activities on site.

6.3 During performance of this work: Weekly coordination meetings are required. The Contractor’s Superintendent shall schedule the weekly coordination meeting with the Quality Assurance representative or the site lead like MMD Operation Project Manager, Project PM, COR,or MMD dam staff.

6.4 Interface with Others: Work under this SOW shall be planned and accomplished in a way to minimize any interferences and inconveniences to the government, the public, and private entities in the area. The Contractor is responsible for daily cleanup of all work areas and securing their property.

6.5 Work Restrictions:

Refer to the specs section 01 14 00 WORK RESTRICTION for details and requirements.

6.6 Security:

Refer to the specs section 01 14 00 WORK RESTRICTION for details and requirements.

6.7 Safety Requirements:

The current edition of the U.S. Army Corps of Engineers Safety and Occupational Health Requirements, EM 385-1-1 (15 Mar 2024), shall be considered a part of this contract and will be enforced as such. The most recent Safety Manual can be found here:

https://www.publications.usace.army.mil/Portals/76/Publications/EngineerManuals/EM_385-1-1.pdf

7.0 FACILITIES

7.1 Contractor will have to provide their own temporary bathroom facilities.

7.2 Water can be made available, from existing sources, for the contractor to utilize in the performance of this contract.

7.3 In addition to the requirements of any other contract clauses, the Contractor shall protect all Government property within the work area and shall be responsible for any damage to Government property and private property caused by Contractor or subcontractor personnel during the performance of this contract.

8.0 SUBMITTALS:

8.1 A Site-Specific Safety Plan: Contractor shall develop a Site-Specific Safety Plan and an Activity Hazard Analysis AHA per EM 385-1-1. An AHA shall be prepared by the contractor performing the work. The AHA shall define the steps performed within the activity, and identify the work sequences, specific anticipated hazards, site conditions, equipment, materials, personnel, and the control measures to be implemented. The names of the qualified person(s) required for a particular activity shall be identified and included in the AHA, as well as proof of their competency/ qualification. The Contractor shall coordinate with the USACE technical POC to develop and provide the AHA and host a pre-work safety briefing before safety barrier installation work commences.

The AHA shall be developed to the extent possible with information available prior to the work activity and submitted to the USACE as a draft no less than fifteen (15) days prior to the commencing work. The AHA shall be completed on site by the Contractor with USACE and facility POC input, reviewed and signed by all applicable parties at the pre-work safety briefing prior to the commencing work.

Samples of Site-Specific Safety Plans and AHAs are available in the EM 385-1-1, current version.

8.2 Truck Specs: Contractor shall submit the specification of each truck/vehicle, documenting that they meet the requirements identified in Federal regulations.

8.3 Driver Information: A background check must be performed on each driver. For each driver, the contractor must submit a copy of a government issued ID along with a filled out Standard Form 86. A Copy of their CDL must also be submitted.

9.0 DEFINITIONS AND ACRONYMS

9.1 The work to be performed under this contract Definitions:

9.2 Contractor: A supplier or vendor awarded a contract to provide specific supplies or service to the government. The term used in this contract refers to the prime.

9.3 Contracting Officer: A person with authority to enter into, administer, and or terminate contracts, and make related determinations and findings on behalf of the government. Note: The only individual who can legally bind the government.

Acronyms:

Project References Attachments:

Attachment 01 - Logistic

Attachment 02 – Project Site Plan

Attachment 03 Attachment 04

Attachment 05 Attachment 06

Attachment 09 - Extreme example of water being released from the 9-foot tunnel directly towards the maintenance bridge pier. Photo from December 1975.

Attachment 07 Attachment 08

Attachment 10 – Diagram showing the pier’s condition as observed in March 2024. Yellow area shows the amount of missing concrete around the pier’s circumference.

Attachment 11 – Example of sediment curtain

Attachment 12 – Example of bridge stabilization

Best Management Practices to be Implemented During the Project

a. All construction activities will take place during daylight hours to minimize noise impacts on the surrounding community.

b. To minimize noise impacts, all equipment and vehicles will have properly functioning mufflers and will be kept in proper tune to reduce backfires.

c. Access to the work site will be via existing roads shown in the design plans.

d. The work site shall be left in a clean and safe condition at the end of each shift. Debris, or other waste generated by the work, shall be removed from the work site and disposed of in a permitted location. After completion of the work, all tools, appliances, surplus materials, temporary drainage, rubbish, and debris incidental to the work shall be removed and disposed of in a permitted location.

e. Equipment will be cleaned before construction to ensure it is free of external petroleum-based products and any invasive noxious weeds. Accumulation of soil or debris will be removed from all construction mechanisms and the undercarriage of equipment before it is used.

f. There will be no discharge of oil, fuels, or chemicals to surface water or onto land.

g. A spill containment kit, including oil-absorbent materials, will be kept on-site during construction in the event of a spill or if any oil product is observed in the water. If a spill were to occur, work will be stopped immediately, steps will be taken to contain the material, and the appropriate agency will be notified. Staff will be trained on using the spill containment kit.

h. In water work will occur during the water window, July 15-August 31.

j. Material placement into the water would be done in a controlled manner to reduce turbidity and in-water noise generation. All trash and unauthorized fill (including concrete blocks or pieces, bricks, asphalt, metal, treated wood, glass, floating debris, and paper) generated during the repair would be removed from the project and staging areas after work is complete.

k. Water quality monitoring for turbidity will be performed as outlined in the Water Quality Monitoring Plan. If a potential exceedance is detected at the early warning sample locations, on-site personnel will be evaluated construction activities and take measures to minimize turbidity generation. Examples include slowing down a specific in-water activity and changing the amount of material that is moved below the waterline.

l. The damages bridge pier will be isolated from the White River with water-tight seals to ensure CDF does not enter the White River or change its water quality parameters.

m. Temporary erosion control measures will be installed for all phases of work as required to prevent the discharge or accumulation of sediment into the river or off-site. A Certified Erosion and Sediment Control Lead will choose and install erosion control materials for specific site conditions as necessary. These may include silt fencing, mats, blankets, check dams, bonded fiber matrix, and straw. Accumulation of sediment in any adjacent swales or storm drains will be monitored daily and cleared to ensure continued service throughout construction.

n. Fueling will occur away from the river, and biodegradable hydraulic fluids will be used as appropriate in any portion of the equipment that will work in the water. A Fueling and Spill Recovery Plan will be developed prior to construction and will include specific BMPs to prevent spills and react quickly should a spill occurs.

o. Construction equipment should be regularly checked for vehicle-fluid drips or leaks.

Section 01 11 00 Page 1

65%-95% DESIGN

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