Notice of Industry Day for MUD MOUNTAIN DAM 9FT TUNNEL STEEL LINER REPAIR
Closed Special Notice Posted
This opportunity was awarded. See the award notice from , or the latest special notice from .
- Solicitation number
- W912DW25B198D
- Agency
-
ENDIST Seattle
US Army Corps of Engineers, Department of Defense
- Responses due
- Set-aside
- No set-aside
Opportunity facts
- NAICS code
- 237990 Other Heavy and Civil Engineering Construction
- Place of performance
- Enumclaw, Washington 98022, United States
- Points of contact
Notice details come from SAM.gov. Updated .
About this opportunity
The U.S. Army Corps of Engineers Seattle District is hosting an Industry Day on August 13, 2025, for the Mud Mountain Dam 9ft Tunnel Steel Liner Repair project located in Enumclaw, Washington. This special notice announces a site visit opportunity for contractors interested in an upcoming civil works project to repair critical steel liner infrastructure at the dam's tunnel entrance. The tunnel's primary function is to pass river debris and sediment through the dam while regulating flood flows, with the steel liner protecting the tunnel structure from damage. Recent inspections conducted in 2023 and 2024 have revealed significant degradation of the 30-year-old steel liner in the area from the bellmouth to the transition ramp. The Army Corps of Engineers is seeking qualified and experienced contractors capable of performing this specialized type of infrastructure repair work.
The Industry Day serves as the sole opportunity for contractors to view the dewatered site, as the tunnel will remain fully watered during the bidding period with no additional site visits planned before contract award. Companies must pre-register and are limited to two personnel per organization for the site visit scheduled from 9:30 AM to 11:30 PM PST at the dam location. The project involves a highly constrained performance window for tunnel closure from July 20, 2026, to September 30, 2026, during which contractors must complete all restoration work including dewatering, sediment removal, steel plate installation, welding, and epoxy grouting. Work hours are restricted to 6:30 AM to 4:00 PM, Monday through Friday, with emergency evacuation procedures required due to potential high river flow conditions. The statement of work indicates contractors must provide specialized equipment including dewatering systems capable of handling 50-700 gallons per minute, tunnel lighting, ventilation systems, and all materials for the complete steel liner restoration project.
Notice text
2 versions
Update #2 · Latest ·
Agency/Office:
U.S. Army Corps of Engineers
Location:
USACE Northwestern Division – Seattle (NWS) District
Title:
INDUSTRY DAY–MUD MOUNTAIN DAM 9FT TUNNEL STEEL LINER REPAIR
LOCATION:
30525 SE Mud Mountain Rd.
Enumclaw, WA 98022
Location information provided in Attachment 1. The onsite visit is restricted to two personnel per company. Follow pre-registration steps provided below.
DATE: 13 AUGUST 2025
TIME: 9:30 AM to 11:30 AM PST
DESCRIPTION:
The United States Army Corps of Engineers (USACE), - Seattle District (NWS) is hosting an Industry Day on 13 AUGUST 2025 to provide information to industry on an upcoming requirement for the Mud Mountain Dam 9ft Tunnel Steel Liner Repair civil works project in Enumclaw, Washington. This industry day will replace the site visit since the tunnel will be fully watered up during the bidding period and there will be no other opportunity to see the dewatered site. The Government is seeking interested, qualified, and experienced sources capable of performing this type of project to attend the site visit.
The Seattle District, U.S. Army Corps of Engineers has a requirement to repair the Mud Mountain Dam’s (MMD) 9ft Tunnel Steel Liner. Specifically, repairs need to be performed on the steel liner at the area from the bellmouth to the transition ramp.
The main functions of the MMD’s 9ft tunnel are to pass the river debris and sediment through the dam and regulate flood flows. At the entrance of the tunnel, the area from the bellmouth to the transition ramp, is approximately 30 years old (replaced in the 1990s). The steel liner is critical for protecting the tunnel from the debris and sediment flowing through it. Significant degradation of the steel liner has been observed during the most recent tunnel inspection that occurred in the summers of 2023 and 2024.
ATTENDING THE SITE VISIT DAY IS HIGHLY RECOMMENDED SINCE IT IS UNLIKELY THAT AN ADDITIONAL SITE VISIT WILL BE OFFERED PRIOR TO AWARD.
The performance window is constrained by restrictions that work occurs prior to flood season (01 October – 28 February) but cannot begin until after July 20, 2026.
Performance Window: July 20th – September 30th, 2026
The contract solicitation and award are planned in FY26 for this project.
The anticipated NAICS code may be NAICS code 237990, Other Heavy and Civil Engineering, Construction.
The proposed project is anticipated to be a competitive, firm-fixed-price contract to be procured in accordance with the Federal Acquisition Regulation (FAR) Part 14, using the Invitation For Bid process to fix the steel liner in the most expeditious manner possible.
After registering, you will receive a confirmation email about the site visit.
You must pre-register to attend this onsite Industry Day by submitting the attached RSVP form in an email to Charles Idle, Contract Specialist, at charles.d.idle@usace.army.mil and Nathan Williams, Project Manager, at nathan.d.williams2@usace.army.mil, and reference the Mud Mountain Dam 9ft Tunnel Steel Liner Repair Project Onsite Industry Day in the subject line. RSVP by 30 JULY 2025 at 4:00 PM PST.
Late respondents, those not pre-registered, or those not providing the correct information will not be granted access to the site. Participation is limited to two representatives from each interested entity.
Required personal protective equipment for the visit includes hard hat, safety vest, and boots/safety shoes.
The following documents are attached in support of this Special Notice.
- Attachment 1 - Location information for Onsite Industry Day
- Attachment 2 - RSVP Form
Small Business Program Inquiries:
Enshane Hill-Nomoto: Enshane.Nomoto@usace.army.mil
https://www.nws.usace.army.mil/Business-With-Us/Small-Business/
Thank you for your interest in this USACE project.
8/14/2025: Amendment - Add Final Visitor List and Draft SOW
Update #1 ·
Agency/Office:
U.S. Army Corps of Engineers
Location:
USACE Northwestern Division – Seattle (NWS) District
Title:
INDUSTRY DAY–MUD MOUNTAIN DAM 9FT TUNNEL STEEL LINER REPAIR
LOCATION:
30525 SE Mud Mountain Rd.
Enumclaw, WA 98022
Location information provided in Attachment 1. The onsite visit is restricted to two personnel per company. Follow pre-registration steps provided below.
DATE: 13 AUGUST 2025
TIME: 9:30 AM to 11:30 AM PST
DESCRIPTION:
The United States Army Corps of Engineers (USACE), - Seattle District (NWS) is hosting an Industry Day on 13 AUGUST 2025 to provide information to industry on an upcoming requirement for the Mud Mountain Dam 9ft Tunnel Steel Liner Repair civil works project in Enumclaw, Washington. This industry day will replace the site visit since the tunnel will be fully watered up during the bidding period and there will be no other opportunity to see the dewatered site. The Government is seeking interested, qualified, and experienced sources capable of performing this type of project to attend the site visit.
The Seattle District, U.S. Army Corps of Engineers has a requirement to repair the Mud Mountain Dam’s (MMD) 9ft Tunnel Steel Liner. Specifically, repairs need to be performed on the steel liner at the area from the bellmouth to the transition ramp.
The main functions of the MMD’s 9ft tunnel are to pass the river debris and sediment through the dam and regulate flood flows. At the entrance of the tunnel, the area from the bellmouth to the transition ramp, is approximately 30 years old (replaced in the 1990s). The steel liner is critical for protecting the tunnel from the debris and sediment flowing through it. Significant degradation of the steel liner has been observed during the most recent tunnel inspection that occurred in the summers of 2023 and 2024.
ATTENDING THE SITE VISIT DAY IS HIGHLY RECOMMENDED SINCE IT IS UNLIKELY THAT AN ADDITIONAL SITE VISIT WILL BE OFFERED PRIOR TO AWARD.
The performance window is constrained by restrictions that work occurs prior to flood season (01 October – 28 February) but cannot begin until after July 20, 2026.
Performance Window: July 20th – September 30th, 2026
The contract solicitation and award are planned in FY26 for this project.
The anticipated NAICS code may be NAICS code 237990, Other Heavy and Civil Engineering, Construction.
The proposed project is anticipated to be a competitive, firm-fixed-price contract to be procured in accordance with the Federal Acquisition Regulation (FAR) Part 14, using the Invitation For Bid process to fix the steel liner in the most expeditious manner possible.
After registering, you will receive a confirmation email about the site visit.
You must pre-register to attend this onsite Industry Day by submitting the attached RSVP form in an email to Charles Idle, Contract Specialist, at charles.d.idle@usace.army.mil and Nathan Williams, Project Manager, at nathan.d.williams2@usace.army.mil, and reference the Mud Mountain Dam 9ft Tunnel Steel Liner Repair Project Onsite Industry Day in the subject line. RSVP by 30 JULY 2025 at 4:00 PM PST.
Late respondents, those not pre-registered, or those not providing the correct information will not be granted access to the site. Participation is limited to two representatives from each interested entity.
Required personal protective equipment for the visit includes hard hat, safety vest, and boots/safety shoes.
The following documents are attached in support of this Special Notice.
- Attachment 1 - Location information for Onsite Industry Day
- Attachment 2 - RSVP Form
Small Business Program Inquiries:
Enshane Hill-Nomoto: Enshane.Nomoto@usace.army.mil
https://www.nws.usace.army.mil/Business-With-Us/Small-Business/
Thank you for your interest in this USACE project.
Files
Notice history
| Notice | Type | Posted |
|---|---|---|
| Mud Mountain Dam Steel Liner Repair | Award Notice | |
| ABSTRACT for Mud Mountain Dam Steel Liner Repair | Special Notice | |
| Mud Mountain Dam Steel Liner Repair | Solicitation | |
| PRESOLICITATION for MUD MOUNTAIN DAM 9FT TUNNEL STEEL LINER REPAIR | Pre-Solicitation | |
| Sources Sought for MUD MOUNTAIN DAM 9FT TUNNEL STEEL LINER REPAIR | Pre-Solicitation | |
| This notice | Special Notice |
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