# Sound Transit Biddingo #AE 0171-26

Multidisciplinary engineering and design services for Sound Transit’s Ballard Link Extension

**Posted:** October 15, 2026
**Respond By:** December 01, 2026
**Identifier:** AE 0171-26
**NAICS:** 541330, 541310, 541370, 541320, 541360, 541620

Sound Transit is seeking a multidisciplinary team to advance engineering and design for the Ballard Link Extension light-rail project.
- **Government buyer:** Central Puget Sound Regional Transit Authority (Sound Transit), serving the Seattle/King County area.
- **Project:** Approximately 7.7 miles of light rail from SODO to Ballard, with up to nine stations, tunnels, elevated and at-grade guideway, utility relocations, and connections to the existing transit network.
- **Requested services:**
  - Base Phase 1: advanced preliminary engineering and design validation, refinement of the existing design, evaluation of cost-reduction opportunities, and development of an approved re-baselined project configuration.
  - Optional phases: final design for the Central and North segments, followed by bid support and construction administration for both segments.
  - Scope includes project management, surveying, right-of-way, civil and utility engineering, geotechnical work, bridges and tunnels, track, architecture, landscape architecture, building systems, communications and controls, environmental services, permitting, sustainability, and third-party coordination.
- **Notable requirements:** Core-team co-location at Sound Transit offices at least three days per week, with rigorous design, interface, permitting, cost, and sustainability controls. The attachment identifies no DBE goal; the solicitation also includes civil-rights and equal-employment requirements.
- **Value:** The stated estimate exceeds $50 million for the base phase, with optional phases anticipated to exceed $100 million; the upper limit is not specified.
- **OEMs and vendors:** No product manufacturers or service vendors are named. Sound Transit is the government buyer.
- **Contract identifier:** RTA/AE 0171-26.

### Description

Sound Transit is requesting qualifications from firms to provide multidisciplinary engineering, architectural, environmental, permitting, and design services for the Ballard Link Extension, a proposed approximately 7.7-mile light rail extension from SODO to Ballard. The base contract covers advanced preliminary engineering and design validation, including refining the design, identifying cost-reduction opportunities, and developing an approved re-baselined project configuration. Optional phases include final design for the Central and North segments, followed by bid support and construction administration. The solicitation also includes a recommended, non-mandatory pre-submittal meeting and calls for electronic submissions by December 1, 2026.

[View original listing](https://biddingo.com/soundtransit/bid/1/41195253/41888328/verification)