Mann Rd at Haystack Creek
October 2021 Update - Completed
Construction of a new concrete box culvert under Mann Rd at Haystack Creek was completed in September 2021. The larger concrete structure replaced two deteriorating metal culverts that contributed to road flooding during storm events. By providing a significantly larger and more natural channel for water to flow under the road, the new culvert will help reduce road flooding and better accommodate fish passage. Planting is planned for the end of October.
To limit ongoing maintenance, reduce road flooding, and prevent road damage and possible traffic impacts due to culvert failure, the culverts were replaced.
The project replaced the twin culverts with one 20-foot span by 6-foot rise, concrete box culvert. To accommodate the new culvert and improve sight distance, the road elevation was raised for approximately 1,400 lineal feet. Ditches and driveway culverts were installed on the south side of the roadway. Guardrail was installed adjacent to the stream culvert. The new culvert was designed to accommodate fish passage.
Construction was estimated at $1.2 million and was paid for by SWM Utility Fees.
Public Meeting & Documents
- Postcard sent to residents - June 2021
- Public meeting recording - October 20, 2020
- Postcard invitation
- Cultural Diversity Public Involvement Survey
- Frequently Asked Questions - 10/20/2020
- Sky Valley Community Public Works Projects - April 2021