1. IA 122 RECONSTRUCTION PRE-BID MEETING
December 5, 2017
10:00 AM
Nick Humpal, P.E.
District 2 Design Engineer

2. PRESENTATION OVERVIEW
IA 122 Reconstruction Concerns
US 65 Sites 1 & 3
Storm Sewer Design
East End
Rock Excavation
Utility Conflicts

3. IA 122 PROJECT LOCATION
Monroe Avenue to Carolina Avenue

4. PROPOSED IMPROVEMENTS
Three Projects – One Contract
Grade and Replace; NHSX-122-1(18)—3H-17
Traffic Signals; NHSX-122-1(19)—3H-17
Traffic Signs; NHSX-122-1(23)—3H-17

5. PROPOSED IMPROVEMENTS
New emergency vehicle access
Reducing severity of curves on east end
Reconstructing Federal & Pennsylvania
On-street bike lanes
Improving intersections
Driveway improvements/removals
Sidewalk reconstruction
Improving drainage

6. Fire
Station

7. Reconstructing Federal Avenue &
Pennsylvania Avenue

9. Previously Demolished
4 Homes
Previously Demolished

10. FEDERAL AVENUE RECONSTRUCTION
Site 3 (2019)
45 Calendar Days
Site 1 (2018)
45 Calendar Days

11. FEDERAL AVENUE (US 65) DETOUR
Reconstruction
Detour Route

12. PENNSYLVANIA AVENUE RECONSTRUCTION
2019
2018

13. STORM SEWER Increasing number of intakes Several new pipes
Adding new outlets for drainage

14. NEW STORM SEWER OUTLETS

15. 5’x5’ RCB Twin 5’x4’ RCB Utilizing existing storm
Sewer mains that require
Unique intake structures.

16. NON-STANDARD INTAKE 5 Single Open Throat 2 Double Open Throat Existing
Main
5 Single Open Throat
2 Double Open Throat

17. ROCK EXCAVATION 3,110 CY anticipated
Estimate based on old city sanitary sewer rock profiles on WB lanes
Quantity double for EB lanes

18. UTILITY CONFLICTS Alliant Energy – Electric Alliant Energy – Gas
Mostly relocated prior to project
Minor coordination, not all poles will be removed
Alliant Energy – Gas
Coordination required for abandoned under pavement
CenturyLink
48 known conflicts (Utility Bid Attachment)

19. UTILITY CONFLICTS Cerro Gordo County - Fiber ITC Midwest - Electric
Impact to P-324 & I-324
Western Edge to assist with installation
ITC Midwest - Electric
Relocated
Iowa Hospital Association - Fiber

20. UTILITY CONFLICTS Mediacom City of Mason City
Working with Alliant Energy
Plan to be relocated prior to project
City of Mason City
Water main work in plans
Sanitary Sewer work in plans
Lighting work in plans

21. CONSTRUCTION Spring of 2018 – 11/20/2018 Spring of 2019 – 11/26/2019
Temporary pavement
Eastbound curves, medians at Monroe & Carolina
Construct westbound lanes
Construct 4-lanes, Massachusetts to Carolina
Two-way traffic on eastbound lanes
Spring of 2019 – 11/26/2019
Construct eastbound lanes
Two-way traffic on westbound lanes

22. CONSTRUCTION 2018

23. EAST END STAGING Existing lanes left in place
To provide adequate drainage.

24. CONSTRUCTION 2019

25. SCHEDULE July 2017: Utility Relocations Began
September 2017: Right-of-Way Acquisition
October 2017: Final Design Complete
December 19, 2017: Project Letting
2018: Westbound Construction
2019: Eastbound Construction

26. ?
THANKS!