Construction Monitoring Plan.pdf
PDF 121 KB Posted
- Attached to
- 26-06 Cer962218C (Cerro Gordo)
- Solicitation number
- 26-06 Cer962218C (Cerro Gordo)
- Issued by
- Carroll County, Iowa
About this file
This is a Construction Monitoring Plan prepared by Bolton & Menk, Inc. for the Iowa Department of Agriculture & Land Stewardship's tile zone nutrient reduction wetland project in Cerro Gordo County. The plan outlines inspection and quality control procedures for construction activities including tile exploration, soil confirmation, site stripping, tile inlet and outlet installation, concrete structure placement, and seed bed preparation. The project encompasses approximately 33,356 cubic yards of earthwork, 3,762 linear feet of tile installation, installation of one inlet and one outlet concrete structure with two concrete manholes, 22 tons of riprap, 1,202 square yards of turf reinforcement mat, and seeding of 10.2 acres. Construction must commence within 14 days of the preconstruction meeting with substantial completion by June 15, 2027, buffer seeding by June 30, 2027, and structural seeding by September 15, 2027. A non-mandatory pre-bid conference is scheduled for July 1, 2026, and sealed bids are due July 16, 2026, at 3:00 p.m. via the Iowa Management of Procurement and Contracts System.
The estimated construction cost range is $350,000 to $400,000. Bidders must be registered with the Iowa Department of Inspections, Appeals & Licensing and submit a bid bond equal to ten percent of the bid amount. The successful bidder must furnish a Performance/Payment Bond equal to one hundred percent of the contract price. The monitoring plan specifies that quality control is the contractor's responsibility, while quality assurance will be verified by the design engineer through material certifications, approved shop drawings, and approved grout and seed mix designs. Tile exploration and soil confirmation must be observed by the engineer or technician with survey equipment, the first 100 feet of tile inlet installation requires an inspector on-site, and the location and elevation of all structures and connections must be verified by surveying equipment prior to backfilling. As-built drawings must include location and elevation data for tile intercepts, outlets, structures, and cross-sectional verification of wetland elevations.
View the file
Other files
| File | Type | Posted |
|---|---|---|
| Doc CC Schedule of Prices.pdf | ||
| Doc CC Proposal - Acknowledgment - Affidavit.pdf | ||
| ADDENDUM 1.pdf | ||
| Plans.pdf | ||
| Specifications.pdf | ||
| 26-06 Cer962218C Notice to Bidders.pdf | ||
| General Requirements.pdf | ||
| Doc EE Bid Bond.pdf | ||
| Doc CC Proposal - Acknowledgement - Affidavit.pdf | ||
| H&H Report.pdf | ||
| Appendix I.pdf |
Show all 11
On GovTribe
Work with this file
- Download the original file
- Contacts named in this file
- Similar government files
- Ask GovTribe AI about this file
Text version
H:\IDALS\0T7133265\3_Design\C_Reports\Wetland QA QC Plan.docx
April 9, 2025
RE: Boehnke Wetland Inspection Plan Site No. CER962218C Cerro Gordo County, Iowa
The sequence of construction will be determined with the contractor after the contract is awarded, the start date planned and whether crops have been harvested. This will be discussed at the pre-construction meeting. The easement boundary stakes and at least 3 benchmarks to be used for construction will be placed by Bolton & Menk, Inc.
Below is a list of anticipated tasks to be completed along with the amount of inspection required and the experience level of the inspector needed.
• Tile Exploration – The exact location and depth of some existing tile on the site have not been determined. This exploration should be done at the beginning of construction, observed by the engineer or technician with survey equipment. This information will be used by design engineer to adjust the tile outlets as needed to provide suitable outlets based on this acquired information. Tile exploration shall be completed prior to ordering structures or pipe.
• Soil Confirmation – The contractor shall excavate test pits as needed to confirm soils for wetland pool before beginning stripping operations. This work should be completed with the design engineer on site. This will likely happen in concurrence with tile exploration.
• Site stripping can occur without an inspector present. The contractor will need to implement storm water and sedimentation control measures.
• The engineer or a technician shall be present during the installation of the first 100 feet of the tile inlet. After contractor demonstrates acceptable competence at installation of the tile in accordance with the specifications, engineer or technician will only be required on a part time basis. Contractor shall notify the engineer if unstable soils requiring bedding material are encountered. No testing is required for backfill of pipe trench.
• The location and elevation of the installation of the concrete structures and pipe connections shall be verified by technician with survey equipment prior to backfilling.
• The tile inlet and outlet shall be measured with surveying equipment. The Joint connections should be observed prior to backfilling. A technician with surveying equipment should check this.
• Seed bed preparation should be checked prior to seeding. The thickness of the topsoil and seed tags shall be verified. A technician familiar with seeding should observe the start of this.
• There is no testing that needs to be completed for this project.
The as-built drawings shall include the following information:
• Location and elevation of tile intercepts and outlets, along with pipe sizes.
• Location and elevation of top of outlet structure and inlet structure.
• Cross section east-west near the center of the wetland to verify elevations.
Name: Boehnke Wetland Inspection Plan Date: April 9, 2025 Page: 2
H:\IDALS\0T7133265\3_Design\C_Reports\Wetland QA QC Plan.docx
Quality control is the responsibility of the contractor, but any work deemed to not be in accordance with the plans and specifications based on inspections completed shall be reworked.
Quality assurance is the responsibility of the contractor but will be verified by the design engineer. This will be accomplished by material certifications provided for all pipe/tile, geotextile, granular material, and riprap. Shop drawings will be submitted and approved for sheet pile, structures, and all pipe. The grout mix and seed mix designs shall be submitted and approved prior to placement.
File details come from the government source that posted it. Updated .