| 1967 |
Appendix N02_5 |
Historical |
Original bridge construction. Deck: 6.5″–7″ top slab. |
| 1996 |
Appendix N02_5, pg 83/95 |
Historical |
Seismic retrofit. Approximately 1.5″ nominal special concrete overlay added per “Modified Expansion Dam Detail — Typical.” Only 12 of 452 retrofit sheets included in Appendix N02_5. |
| Oct 25, 2022 |
RFP / Appendix A1 |
WSDOT → Proposers |
RFP issued. Appendix N2 (Bridge As-Builts) designated “R” (Reference Document) in Appendix A1. TR 2.13.1 disclaims dimensional accuracy and requires Design-Builder to field measure and verify existing dimensions. |
| Dec 2022 |
Contract |
— |
Contract No. 009727 executed. |
| Feb 21, 2025 |
SL9727-079 |
WSDOT → Skanska |
WSDOT denies Vault NW12 claim citing GP 1-01.3, GP 1-02.2: as-builts are Reference Documents, reliance at DB’s own risk. Establishes precedent directly applicable to DSC 007/008. |
| Jan 24, 2026 |
TCP 119 REV01 |
Field operations |
TCP 119 demolition closure begins. Full freeway closure for Bridge 405/70N-W deck removal operations commence. |
| Jan 24, 2026 |
Penhall letter (att. LTR 334) |
Penhall → Skanska |
Penhall discovers deck thickness variation during active removal operations. Discovery occurs same day as demolition start. Conditions discovered after mobilization, not before. |
| Jan 27, 2026 |
Penhall letter |
Penhall → Skanska |
Penhall notifies Skanska (3 days after discovery). Claims conditions differ from those “contemplated at the time of bid and execution of the Subcontract.” Claims deck exceeds as-builts by “approximately 2 to 4 inches.” Attaches annotated drawings showing coring results of 9″–9.5″. |
| Jan 29, 2026 |
LTR 334 |
Skanska → WSDOT |
DSC 007 notice to WSDOT (5 days after discovery). Claims deck thicknesses “materially exceed” Contract Documents and as-built drawings. Attaches Penhall letter and annotated drawings. |
| Feb 9, 2026 |
M&M Memo (att. LTR 377) |
Modjeski & Masters |
Structural verification memo concludes no modification to demolition plans needed despite increased dead load from additional deck thickness. Engineering re-evaluation cost: $38,500 ($22K third-party + $16.5K re-eval). |
| Feb 12, 2026 |
SL 9727-264 |
WSDOT → Skanska |
Written Determination denying DSC. Three grounds: (1) TR 2.13.1 disclaims accuracy and requires field verification; (2) as-builts are Reference Documents under GP 1-01.3 and GP 1-02.2; (3) Form A certification. |
| Feb 23, 2026 |
Penhall letter (att. LTR 359 and LTR 377) |
Penhall → Skanska |
Penhall responds to SL 9727-264 rebutting all 3 grounds. Claims: material deviation, latent condition, not reasonably discoverable, Section 2.13.1 does not eliminate GP 1-04.7, disclaimer does not nullify DSC clause. Requests 14–28 day extension for supplemental. |
| Feb 26, 2026 |
LTR 359 |
Skanska → WSDOT |
Notice of Protest 016 (SKA-0308) under GP 1-04.5. Disagrees with WSDOT interpretation of GP 1-04.7, TR 2.13.1, GP 1-01.3, and GP 1-02.2. Requests 14-day extension to supplemental deadline. Attaches Penhall Feb 23 response. |
| Feb 27, 2026 |
SL 9727-283 |
WSDOT → Skanska |
Acknowledges protest. Denies 14-day extension request. Sets supplemental deadline as Friday, March 13, 2026. (Skanska had requested Mar 26; WSDOT held to Mar 13.) |
| Mar 12, 2026 |
Penhall Supplemental (Att. A to LTR 377) |
Penhall → Skanska |
Supplemental letter with cost/schedule impact summary. Schedule: 4.5 weeks (4 weeks engineering + 0.5 weeks demolition). Cost: $298,500 in line items. Includes Deck Thickness Mapping table. Uses 7.0″ as baseline for all spans (ignores documented 1996 overlay). |
| Mar 13, 2026 |
LTR 377 |
Skanska → WSDOT |
Supplemental Protest (55-page package). Pursues Type (b) DSC. Total ROM: $378,613. Claims 34-calendar-day delay. Rebuts all 3 WSDOT grounds. Attaches Penhall supplemental, original notice, cost breakdown, as-built drawings, deck thickness mapping. Note: No TIA submitted — PCO 010B controls critical path. |