From: Sharrer, Kyle <Kyle.Sharrer@skanska.com>

Sent: Monday, May 19, 2025 11:36 AM

To: Berriz, Sonia (Consultant); Lucarelli, Zachary

Cc: Lovering, Janka (Consultant)

Subject: [EXTERNAL] RE: Load Rating - NW -12 Vault

Attachments: Bothell Culvert Analysis 043025.etcx; NW-12 Vault - As-Builts with Mark Ups.pdf; NW-12 Vault - Typical Section.pdf

WARNING: This email originated from outside of WSDOT. Please use caution with links and attachments.

Sonia,

See responses in blue below.  All of the attached files have also been added to the original submittal in Procore here.

Let me know if you have any questions.

Thanks,

Kyle Sharrer

+1 909 721 9753

From: Berriz, Sonia (Consultant) <Sonia.Berriz@consultant.wsdot.wa.gov>
Sent: Thursday, May 8, 2025 1:14 PM
To: Sharrer, Kyle <Kyle.Sharrer@skanska.com>; Lucarelli, Zachary <Zachary.Lucarelli@skanska.com>
Cc: Lovering, Janka (Consultant) <Janka.Lovering@consultant.wsdot.wa.gov>
Subject: Load Rating - NW -12 Vault
Importance: High

Hi,

I am asking more clarification but have heard that we need the following. Can you work to provide?

• Drawing plan, elevation and section of vault with member sizes, geometry ,reinforcement

• See “As-Builts with Mark-Ups” attachment.

• Drawings showing dead loading (permeable pavement, soil, rock, temp barrier, construction loads), live loading (lane configuration and number of lanes)

• See “Typical Section” attachment.
• The attached diagram shows a typical section at the culvert with the lane and barrier locations relative to the culvert. The culvert was analyzed using the Erikkson Culvert software, the program indicated for box culvert design and analysis by WSDOT. The software determines the critical load case for the appropriate number of lanes based on the culvert width in accordance with the AASHTO LRFD 9th Edition and load ratings in accordance with the AASHTO MBE as per the WSDOT BDM.

• Load rating of the covers and risers and section with openings are required.

• Typically, additional reinforcement is added around culvert openings in the area adjacent to the openings to compensate for interrupted rebars. This could be confirmed with field investigations to confirm spacing on the interior face of the top slab if necessary. However, since the culvert design is sufficient for traffic loading, it is most likely that standard design practices were also followed for the hatch openings. Also, the hatch openings are located at the edge of the top slab near the side walls and would primarily impact the shear capacity. The minimum load rating for shear for the top slab is 1.38 which is comfortably greater than 1.0.

• Software Approval – Erickson Culvert is not an approved software and needs BPO approval per 15.12.2. (asking for clarification on this process) – This was communicated to Skanska this is acceptable.

• Computer files – Provide the employed software is approved, please send all computer files per 13.4

• See “Bothell Culvert Analysis 043025” file attached.

Thank you!

-Sonia

Sonia Berriz, P.E.
WSDOT Design Manager
(425) 876-6283 (cell)