Mann Rd at Haystack Creek
October 2021 Update
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 must be replaced.
The project will replace 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 will be raised for approximately 1,400 lineal feet. Ditches and driveway culverts will be installed on the south side of the roadway. Guardrail will be installed adjacent to the stream culvert. The new culvert will be designed to accommodate fish passage.
Construction to begin on June 21, 2021 and is expected to be completed by mid-August. Crews will be working approximately Monday - Friday 7 a.m. to 5 p.m. There may be some weekend work required.
During construction, traffic will be moved to a bypass road on Mann Rd between milepost 1.7 and milepost 2.0. A temporary traffic signal will be in place on the single-lane bypass road, alternating traffic 24/7. At times there may be up to a 10-minute wait.
Construction is estimated at $1.2 million and will be 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