2018 Greenbelt Trail HMA Reconstruction Project
7/20/2018: The final 2” lift of asphalt was placed by Grimes Asphalt on Wednesday and the painting subcontractor is on site today to mark the trail centerline. The grading subcontractor is expected to return to the site next Monday to backfill shoulders. Temporary stabilization of disturbed areas is also anticipated by the end of next week prior to reopening this section of trail.
7/13/2018: The grading subcontractor was able to return to the job site on Monday of this week (7/9) and start grading shoulders and drainage ditches along the new trail edge. A connection/drainage way has also been cut between the west oxbow and Walnut Creek. These grading operations are expected to be completed by the end of the day today. Remaining work items prior to project completion include the following: paving the last 2” asphalt surface lift, final grading/backfilling along the finished trail edges, centerline pavement markings and stabilization/restoration. It is expected that the disturbed areas affected by construction will be temporarily stabilized prior to completion of final seeding at a later date (late summer/early fall).
7/2/2018: As a result of major flooding over the past weekend, no work in the project area is expected in the foreseeable future. Assuming no additional major rain events in the short term, trail condition/damage assessments will be made later this week as waters recede.
6/22/2018: Unfortunately, this week’s update is the same as last week’s with persistent and sometimes significant rain events continuing to stall progress on the project. Neither Grimes Asphalt nor their grading subcontractor were able to return to the job site this week because of wet conditions. Given the project location in a heavily wooded section of floodplain, additional drying time over and above what may be needed on other job sites is required. Both City Staff and the Contractor are anxious to return and complete work on the project once conditions allow.
6/14/2018: Rains last weekend and periodically throughout the week have hampered progress. Grimes Asphalt was not able to return to the job site this week because of wet conditions. Once site conditions allow, the 2-inch surface course of asphalt will be placed followed by additional shoulder and ditch grading adjacent to the trail.
6/08/2018: Paving of the 3-inch base course of asphalt was completed this week on all trail sections in the project area. The final 2-inch surface course of asphalt is expected to be paved next week. Once all paving has been completed, additional grading of shoulders and drainage ditches adjacent to the new trail paving will be completed by the grading subcontractor.
6/01/2018: Asphalt paving along the new trail alignment is expected to begin next week. Two lifts of asphalt will be placed; a 3-inch base course followed by a 2-inch surface course. Trail connection sections to existing crossings of Walnut Creek at Rio Valley/Greenbelt Drive and NW 108th Street will be paved first. The concrete section of trail paved last week under NW 114th Street has reopened eliminating the need for detoured trail traffic to cross NW 114th Street.
5/25/2018: Milling of the existing trail surface has been completed within the project limits. Additional grading of the realigned trail sections further to the east is still required prior to asphalt paving operations commencing. Work in these areas will continue next week and include the addition of granular subbase and/or fly ash as needed in the wettest spots to help stabilize the grade and allow work to continue. Later today (5/25), crews from Grimes Asphalt are expected to pour a short concrete section of the trail under the NW 114th Street bridge to the trail intersection on the west side of the street.
5/18/2018: The project area was wet early in the week from last weekend’s rains. Grimes Asphalt was able to mobilize to the project site mid-week and begin milling operations. The material generated is currently being hauled and placed on the new trail alignment. Crews are expected to be on-site tomorrow (Saturday) to get as much material placed prior to more rain events forecast for later this weekend and into next week.
5/11/2018: Additional grading along the proposed alignment was completed this week. Grimes Asphalt is expected to be on site next week to begin milling up the existing trail surface. This material will be placed and compacted as subbase on the proposed alignment prior to paving the new asphalt surface. Milling is expected to start on the east end of the project near Greenbelt Park and Porter Shelter and head west. Additional grading will be needed on the east end of the project once the existing trail surface is removed.
5/03/2018: Recent rains have hampered progress this week. The grading subcontractor is expected to return next week once the job site dries out.
4/27/2018: Clearing and grubbing operations were completed earlier this week. The grading subcontractor mobilized to the job site mid-week and started excavating along the proposed alignment. These operations include construction of the embankment and culvert at the oxbow crossing which may be nearing completion by the end of the day today. Grading work will continue next week as on-site conditions allow.
4/20/2018: Wet conditions this week hindered progress. The clearing and grubbing subcontractor is on site today removing stumps along the proposed trail alignment. This work will continue early next week followed by the grading subcontractor moving in to begin construction and stabilization of the new trail base.
4/13/2018: A full closure of the Greenbelt Trail between NW 114th Street and Porter Shelter is expected to be in place beginning next Monday morning, April 16th. This will include trail connection closures to the Aquatic Center, Lincoln Avenue, Greenbelt Drive and Rio Valley Drive. Directional signage along the detour route on NW 103rd, Clark and NW 109th Streets (see link to Project Map below) will also be in place next Monday. Removal of tree stumps and grading operations along the proposed trail alignment will proceed once the closures are in place and site conditions allow.
2018 Greenbelt Trail HMA Reconstruction Project
The City of Clive recently awarded a contract to Grimes Asphalt and Paving Corporation to reconstruct portions of the Greenbelt Trail between NW 114th Street and Porter Shelter in Greenbelt Park. The trail will be realigned away from Walnut Creek at several key points and repaved with 5-inches of hot mix asphalt (HMA). This project map link below shows the proposed improvements in more detail:
- Blue Line – existing trail alignment
- Yellow Line – proposed trail alignment
- Red Line – detour route during construction
Other work items in the project scope include recycling the existing asphalt surface to use as subbase under the new pavement, realigning/repaving trail connections to the south at Rio Valley Drive and NW 108th Street and completing a connection between last year’s Oxbow excavation and Walnut Creek.
Work on the project is tentatively scheduled to start the week of April 16th. This approximate start date and the schedule moving forward are largely dependent on weather conditions encountered this spring. Final completion of the project is expected by mid-summer. Please continue to visit this webpage during construction for periodic updates. Questions, concerns or the need for additional information may be directed to Jim Hagelie at 223-6231 or firstname.lastname@example.org.