| Structures | DS-15001 | Concrete Surface Preparation and Testing Prior to Coating Application | 12/15/2015 | New | Kimball Olson | 515-233-7722 | 
	| Miscellaneous Construction | DS-15002 | Airport Safety Requirements | 10/20/2015 | New | Mike Marr | 515-239-1468 | 
	| General Requirements and Covenants | DS-15003 | Added Options Bidding | 10/20/2015 | New | Ed Kasper | 515-239-1414 | 
	| General Requirements and Covenants | DS-15004 | Best Value Alternative (A - D) Bidding | 10/20/2015 | New | Ed Kasper | 515-239-1414 | 
	| General Requirements and Covenants | DS-15005 | Construction Progress Schedule | 10/20/2015 | New | Kevin Merryman | 515-239-1848 | 
	| Structures | DS-15006 | Sliplining Existing Pipe Culverts | 10/20/2015 | Replaced by DS-15068 | Jimmy Ellis | 515-233-7949 | 
	| Miscellaneous Construction | DS-15007 | Contractor Stockpiled Shoulder Material | 10/20/2015 | New | None |  | 
	| Structures | DS-15008 | Fabric Formed Concrete Structure Revetment | 10/20/2015 | New | Jimmy Ellis | 515-233-7949 | 
	| Structures | DS-15009 | Bridge Deck Over-Depth Repair and Overlay | 10/20/2015 | New | None |  | 
	| Surface Courses | DS-15010 | Dowel Bar Retrofit | 10/20/2015 | New | Kevin Merryman | 515-239-1848 | 
	| Surface Courses | DS-15011 | PCC Pavement Non-Destructive Thickness Determination | 10/20/2015 | Replaced by DS-15051 | Kevin Jones | 515-239-1237 | 
	| General Requirements and Covenants | DS-15012 | Lane Rental (A + B Bidding with Incentive/Disincentive) | 10/20/2015 | New | Ed Kasper | 515-239-1414 | 
	| Surface Courses | DS-15013 | Alternate Acceptance of HMA for Local Systems Projects | 10/20/2015 | Replaced by DS-15082 | None |  | 
	| Structures | DS-15014 | Precast Reinforced Concrete Three-Sided Culvert | 10/20/2015 | New | Jimmy Ellis | 515-233-7949 | 
	| Miscellaneous Construction | DS-15015 | Portable Temporary Traffic Signals for Flagger Stations | 10/20/2015 | Replaced by DS-15065 | Dan Sprengeler | 515-239-1823 | 
	| General Requirements and Covenants | DS-15016 | Small Business Development Contracts | 10/20/2015 | Replaced by DS-15045 | Karen Kienast | 515-233-7970 | 
	| General Requirements and Covenants | DS-15045 | Small Business Development Contracts | 8/16/2016 | Replaced By DS-15048 | Karen Kienast | 515-233-7970 | 
	| Structures | DS-15017 | Adhesive-Bonded Anchors and Dowels for Traffic Railings | 10/20/2015 | Replaced by DS-15080 | Michael Nop | 515-239-1233 | 
	| Structures | DS-15081 | Mass Concrete - Control of Heat of Hydration | 4/21/2020 | Replaces DS-15077 | Curtis Carter | 515-239-1185 | 
	| Surface Courses | DS-15018 | Pavement Interlayer Geotextile | 10/20/2015 | Replaced by DS-15046 | None |  | 
	| Erosion Control | DS-15019 | Floating Silt Curtain | 10/20/2015 | New | None |  | 
	| Structures | DS-15020 | Structural Concrete (4500 psi or Greater) | 10/20/2015 | Replaced by DS-15056 | Ahmad Abu-Hawash | 515-239-1393 | 
	| Surface Courses | DS-15021 | Transverse Joint Leveling for HMA Pavements | 10/20/2015 | Replaced by DS-15070 | None |  | 
	| Surface Courses | DS-15022 | Partial Depth PCC Finish Patches | 10/20/2015 | Replaced by DS-15050 | Kevin Merryman | 515-239-1848 | 
	| Structures | DS-15023 | Partial Depth Bridge Deck Patching | 10/20/2015 | New | Michael Nop | 515-239-1233 | 
	| Surface Courses | DS-15024 | Hot Mix Asphalt Interlayer | 10/20/2015 | Replaced by SS-15006 | Jeffrey Shmitt | 515-239-1013 | 
	| Surface Courses | DS-15025 | Hot Mix Asphalt Thin Lift Overlay | 10/20/2015 | Replaced by DS-15037 | Jeffrey Shmitt | 515-239-1013 | 
	| Miscellaneous Construction | DS-15026 | Construction or Maintenance Work on Railroad Right-of-Way (Chicago, Central, & Pacific Railroad Company and Cedar River Railroad Company) | 10/20/2015 | Replaced by DS-15034 | Eric Johnsen | 515-239-1662 | 
	| Miscellaneous Construction | DS-15027 | Construction Work on Railroad Right of Way with A + B for Bidding Railroad Flaggers (Union Pacific) | 10/20/2015 | Replaced by DS-15040 | Eric Johnsen | 515-239-1662 | 
	| Miscellaneous Construction | DS-15028 | Maintenance Work on Railroad Right of Way (Union Pacific) | 10/20/2015 | Replaced by DS-15041 | Eric Johnsen | 515-239-1662 | 
	| Structures | DS-15029 | Fiber Reinforced Polymer Repair for Concrete Containment of Collision Damaged Pretensioned Prestressed Concrete Beams | 10/20/2015 | New | None |  | 
	| Structures | DS-15030 | Modular Expansion Joint Assembly | 10/20/2015 | New | Michael Nop | 515-239-1233 | 
	| Surface Courses | DS-15031 | Quality Management Concrete (QM-C) | 10/20/2015 | Replaced by DS-15038 | Kevin Merryman | 515-239-1848 | 
	| Structures | DS-15032 | Mass Concrete - Control of Heat of Hydration | 10/20/2015 | Replaced by DS-15077 | Curtis Carter | 515-239-1185 | 
	| Structures | DS-15033 | High Performance Concrete for Structures | 10/20/2015 | Replaced by DS-15044 | Wayne Sunday | 515-239-1185 | 
	| Miscellaneous Construction | DS-15034 | Construction or Maintenance Work on Railroad Right-of-Way (Chicago, Central, & Pacific Railroad Company and Cedar River Railroad Company) | 11/17/2015 | Replaced by DS-15042 | Eric Johnsen | 515-239-1662 | 
	| Structures | DS-15035 | Structural Concrete Coating | 12/15/2015 | New | Kimball Olson | 515-233-7722 | 
	| Surface Courses | DS-15036 | Evaluation of Longitudinal Joint Quality for Flexible Paving Mixtures with Incentive/Disincentive | 12/15/2015 | New | Jeffrey Shmitt | 515-239-1013 | 
	| Surface Courses | DS-15037 | High Performance Thin Lift Overlay | 2/16/2016 | Replaced by DS-15043 | Jeffrey Shmitt | 515-239-1013 | 
	| Surface Courses | DS-15043 | High Performance Thin Lift Overlay | 10/18/2016 | Replaced by DS-15057 | Jeffrey Shmitt | 515-239-1013 | 
	| Surface Courses | DS-15038 | Quality Management Concrete (QM-C) | 4/19/2016 | Replaced by DS-15084 | Elijah Gansen | 515-233-7865 | 
	| Miscellaneous Constructions | DS-15039 | Construction or Maintenance Work on Railroad Right-of-Way (Dakota, Minnesota, & Easter Railroad Corporation dba Canadian Pacific) | 4/19/2016 | Replaced by DS-15047 | Eric Johnsen | 515-239-1662 | 
	| Miscellaneous Construction | DS-15040 | Construction Work on Railroad Right-of-Way with A+B for Bidding Railroad Flaggers (Union Pacifc Railroad) | 5/17/2016 | Replaced by DS-15061 | Eric Johnsen | 515-239-1662 | 
	| Miscellaneous Construction | DS-15041 | Maintenance Work on Railroad Right-of-Way (Union Pacifc Railroad) | 5/17/2016 | Replaced by DS-15054 | Eric Johnsen | 515-239-1662 | 
	| Miscellaneous Construction | DS-15042 | Construction or Maintenance Work on Railroad Right-of-Way (Chicago, Central, & Pacific Railroad Company and Cedar River Railroad Company) | 5/17/2016 | Replaced by DS-15053 | Eric Johnsen | 515-239-1662 | 
	| Structures | DS-15044 | High Performance Concrete for Structures | 6/21/2016 | Replaced by DS-15073 | Kyle Frame | 515-239-1619 | 
	| Surface Courses | DS-15046 | Pavement Interlayer Geotextile for PCC Overlays | 11/15/2016 | Replaced by DS-15052 | Kevin Merryman | 515-239-1848 | 
	| Miscellaneous Construction | DS-15047 | Construction or Maintenance Work on Railroad Right-of-Way (Dakota, Minnesota, & Eastern Railroad Corporation dba Canadian Pacific) | 10/18/2016 | Replaced by DS-15088 | Eric Johnsen | 515-239-1662 | 
	| Miscellaneous Construction | DS-15088 | Construction or Maintenance Work on Railroad Right-of-Way (Dakota, Minnesota, & Eastern Railroad Corporation dba Canadian Pacific) | 11/16/2021 | Replaced by DS-15100 | Eric Johnsen | 515-239-1662 | 
	| General Requirements and Covenants | DS-15048 | Small Business Development Contracts | 12/20/2016 | Replaced by DS-15075 | Karen Kienast | 515-239-7970 | 
	| Surface Courses | DS-15049 | Primary and Interstate Pavement Smoothness | 12/20/2016 | Replaced by DS-15079 | Jeff Devries | 515-239-1237 | 
	| Surface Courses | DS-15050 | Partial Depth PCC Finish Patches | 01/18/2017 | Replaced by GS-15006 | Kevin Merryman | 515-239-1848 | 
	| Surface Courses | DS-15051 | PCC Pavement Non-Destructive Thickness Determination | 1/18/2017 | Replaced by DS-15064 | Jeff Devries | 515-239-1237 | 
	| Surface Courses | DS-15052 | Pavement Interlayer Geotextile for PCC Overlays | 1/18/2017 | Replaces DS-15046 | Elijah Gansen | 515-233-7865 | 
	| Miscellaneous Construction | DS-15053 | Construction or Maintenance Work on Railroad Right-of-Way (Chicago, Central, & Pacific Railroad Company and Cedar River Railroad Company) | 2/21/2017 | Replaced by DS-15055 | Eric Johnsen | 515-239-1662 | 
	| Miscellaneous Construction | DS-15054 | Maintenance Work on Railroad Right-of-Way (Union Pacifc Railroad) | 5/16/2017 | Replaced by DS-15062 | Eric Johnsen | 515-239-1662 | 
	| Miscellaneous Construction | DS-15055 | Construction or Maintenance Work on Railroad Right-of-Way (Chicago, Central, & Pacific Railroad Company and Cedar River Railroad Company) | 5/16/2017 | Replaced by DS-15059 | Eric Johnsen | 515-239-1662 | 
	| Structures | DS-15056 | Structural Concrete (4500 psi or Greater) | 10/17/2017 | Replaces DS-15020 | Ahmad Abu-Hawash | 515-239-1393 | 
	| Surface Courses | DS-15057 | High Performance Thin Lift Overlay | 10/17/2017 | Replaced by DS-15063 | Jeffrey Shmitt | 515-239-1013 | 
	| Surface Courses | DS-15069 | PCC Pavement Nondestructive Thickness Determination | 1/16/2019 | Replaced by GS-15012 | Elijah Gansen | 515-233-7865 | 
	| Miscellaneous Construction | DS-15067 | Maintenance Work on Railroad Right-of-Way (Union Pacific Railroad) | 10/16/2018 | Replaced by DS-15098 | Eric Johnsen | 515-239-1662 | 
	| Surface Courses | DS-15066 | High Performance Thin Lift Overlay | 09/18/2018 | Replaced by DS-15071 | Jeffrey Schmitt | 515-239-1013 | 
	| Miscellaneous Construction | DS-15065 | Portable Temporary Traffic Signals for Flagger Stations | 7/17/2018 | Replaces DS-15015 | Dan Sprengeler | 515-239-1823 | 
	| Surface Courses | DS-15064 | PCC Pavement Nondestructive Thickness Determination | 4/17/2018 | Replaced by DS-15069 | Kevin Jones | 515-239-1237 | 
	| Surface Courses | DS-15063 | High Performance Thin Lift Overlay | 4/17/2018 | Replaced by DS-15066 | Jeffrey Schmitt | 515-239-1013 | 
	| Miscellaneous Construction | DS-15062 | Maintenance Work on Railroad Right-of-Way (Union Pacific Railroad) | 4/17/2018 | Replaced by DS-15067 | Eric Johnsen | 515-239-1662 | 
	| Miscellaneous Construction | DS-15061 | Construction Work on Railroad Right-of-Way with A+B for Bidding Railroad Flaggers (Union Pacific Railroad) | 4/17/2018 | Replaced by DS-15098 | Eric Johnsen | 515-239-1662 | 
	| Surface Courses | DS-15060 | Penetrating Engineered Fog Seal | 2/20/2018 | Obsolete | Chris Brakke | 515-239-1882 | 
	| Miscellaneous Construction | DS-15059 | Construction or Maintenance Work on Railroad Right-of-Way (Chicago, Central, & Pacific Railroad Company and Cedar River Railroad Company) | 11/21/2017 | Replaced by DS-15074 | Eric Johnsen | 515-239-1662 | 
	| Miscellaneous Construction | DS-15058 | On-Call Contracting for High Tension Cable Guardrail Repair | 1/17/2018 | Replaced by DS-15101 | Daniel Harness | 515-239-1727 | 
	| Structures | DS-15068 | Sliplining Existing Pipe Culverts | 11/20/2018 | Replaced by DS-15085 | Jimmy Ellis | 515-233-7949 | 
	| Surface Courses | DS-15070 | Transverse Crack Leveling for HMA Pavements | 4/16/2019 | Replaces DS-15021 | None |  | 
	| Surface Courses | DS-15071 | High Performance Thin Lift Overlay | 4/16/2019 | Replaced by DS-15078 | Jeffrey Schmitt | 515-239-1013 | 
	| Miscellaneous Construction | DS-15072 | Flood Debris Removal | 4/16/2019 | New | None |  | 
	| Structures | DS-15073 | High Performance Concrete for Structures | 10/15/2019 | Replaced by DS-15099 | Curtis Carter | 515-239-1185 | 
	| Miscellaneous Construction | DS-15074 | Construction or Maintenance Work on Railroad Right-of-Way (Chicago, Central, & Pacific Railroad Company and Cedar River Railroad Company) | 11/19/2019 | Replaced by DS-15087 | Eric Johnsen | 515-239-1662 | 
	| General Requirements and Covenants | DS-15075 | Small Business Development Contracts | 10/15/2019 | Replaces DS-15048 | Karen Kienast | 515-239-7970 | 
	| Structures | DS-15076 | Girder Erection Plan | 12/17/2019 | New | Michael Nop | 515-239-1233 | 
	| Structures | DS-15077 | Mass Concrete - Control of Heat of Hydration | 12/17/2019 | Replaced by DS-15081 | Curtis Carter | 515-239-1185 | 
	| Surface Courses | DS-15078 | High Performance Thin Lift Overlay | 12/17/2019 | Replaced by DS-15083 | Jeffrey Schmitt | 515-239-1013 | 
	| Surface Courses | DS-15079 | Primary and Interstate Pavement Smoothness | 12/17/2019 | Replaced by SS-15011 | Jeff Devries | 515-239-1237 | 
	| Structures | DS-15080 | Adhesive-Bonded Anchors and Dowels for Traffic Railings | 1/22/2020 | Replaces DS-15017 | Michael Nop | 515-239-1233 | 
	| Surface Courses | DS-15082 | Alternate Acceptance of HMA for Local Systems Projects | 4/21/2020 | Replaces DS-15013 | Jeffrey Schmitt | 515-239-1013 | 
	| Surface Courses | DS-15083 | High Performance Thin Lift Overlay | 7/21/2020 | Replaced by DS-15086 | Jeffrey Schmitt | 515-239-1013 | 
	| Surface Courses | DS-15084 | Quality Management Concrete (QM-C) | 12/15/2020 | Replaces DS-15038 | Elijah Gansen | 515-233-7865 | 
	| Structures | DS-15085 | Sliplining Existing Pipe Culverts | 12/15/2020 | Replaced by DS-15090 | Jimmy Ellis | 515-233-7949 | 
	| Surface Courses | DS-15086 | High Performance Thin Lift Overlay | 12/15/2020 | Replaced by DS-15103 | Jeffrey Schmitt | 515-239-1013 | 
	| Miscellaneous Construction | DS-15087 | Construction or Maintenance Work on Railroad Right-of-Way (Chicago, Central, & Pacific Railroad Company and Cedar River Railroad Company) | 12/15/2020 | Replaced by DS-15096 | Eric Johnsen | 515-239-1662 | 
	| Miscellaneous Construction | DS-15089 | Multi-Component Liquid Pavement Markings | 2/15/2022 | Replaced by DS-15097 | Brian Worrel | 515-239-1471 
 | 
	| Structures | DS-15090 | Sliplining Existing Pipe Culverts | 2/15/2022 | Replaces DS-15085 | Jimmy Ellis | 515-233-7949 | 
	| Miscellaneous Construction | DS-15091 | Electronic Ticketing | 12/21/2021 | Replaced by DS-15095 | Matthew Miller | 515-233-7843 | 
	| Structures | DS-15092 | Ultra High Performance Concrete Connections | 3/15/2022 | New | Curtis Carter | 515-239-1185 | 
	| Structures | DS-15093 | Ultra High Performance Concrete Overlay | 3/15/2022 | New | Curtis Carter | 515-239-1185 | 
	| Structures | DS-15094 | Partial Removal of Existing Bridge Deck Using Hydrodemolition | 3/15/2022 | New | Michael Nop | 515-239-1233 | 
	| Miscellaneous Construction | DS-15095 | Electronic Ticketing | 12/21/2021 | Replaces DS-15091 | Matthew Miller | 515-233-7843 | 
	| Miscellaneous Construction | DS-15096 | Construction or Maintenance Work on Railroad Right-of-Way (Chicago, Central, & Pacific Railroad Company and Cedar River Railroad Company) | 04/19/2022 | Replaced by DS-15110 | Eric Johnsen | 515-239-1662 | 
	| Miscellaneous Construction | DS-15097 | Multi-Component Liquid Pavement Markings | 3/15/2022 | Replaced by DS-15109 | Brian Worrel | 515-239-1471 
 | 
	| Miscellaneous Construction | DS-15098 | Construction or Maintenance Work on Railroad Right-of-Way (Union Pacific Railroad) | 6/21/2022 | Replaces DS-15061 and DS-15067 | Eric Johnsen | 515-239-1662 | 
	| Structures | DS-15099 | High Performance Concrete for Structures | 10/18/2022 | Replaces DS-15073 | Curtis Carter | 515-239-1185 | 
	| Miscellaneous Construction | DS-15101 | On-Call Contracting for High Tension Cable Guardrail Repair | 2/21/2023 | Replaces DS-15058 | Daniel Harness | 515-239-1727 | 
	| Miscellaneous Construction | DS-15102 | Fuel Adjustment for AASHTOWare Project | 12/20/2022 | New | Kevin Merryman | 515-239-1848 | 
	| Surface Courses | DS-15103 | High Performance Thin Lift Overlay | 2/21/2023 | Replaces DS-15086 | Jeffrey Schmitt | 515-239-1013 | 
	| Surface Courses | DS-15104 | Cross Stitching of Concrete Pavement | 2/21/2023 | New | Elijah Gansen | 515-233-7865 | 
	| Miscellaneous Construction | DS-15105 | Intelligent Transportation Systems | 04/18/2023 | Replaced by DS-15106 | Mark Van Dyke | 515-815-5620 | 
	| Miscellaneous Construction | DS-15106 | Intelligent Transportation Systems | 06/20/2023 | Replaces DS-15105 | Mark Van Dyke | 515-815-5620 | 
	| Miscellaneous Construction | DS-15100 | Construction or Maintenance Work on Railroad Right-of-Way (Dakota, Minnesota, & Eastern Railroad Corporation dba Canadian Pacific) | 06/20/2023 | Replaces DS-15088 | Eric Johnsen | 515-239-1662 | 
	| Surface Courses | DS-15107 | Void Reducing Asphalt Membrane | 08/15/2023 | New | Ashley Buss | 515-233-7837 | 
	| Miscellaneous Construction | DS-15108 | Deep Soil Injection for Pavement Leveling | 08/15/2023 | New | Melissa Serio | 515-239-1280 
 | 
	| Miscellaneous Construction | DS-15109 | Multi-Component Liquid Pavement Markings | 06/06/2023 | Replaces DS-15097 | Brian Worrel | 515-239-1471 | 
	| Miscellaneous Construction | DS-15110 | Construction or Maintenance Work on Railroad Right-of-Way (Chicago, Central, & Pacific Railroad Company and Cedar River Railroad Company) | 06/20/2023 | Replaces DS-15096 | Eric Johnsen | 515-239-1662 |