Technical Services
By
Nathan Haaland
Increase in Construction Costs
Asphalt $350 to $735 per ton
Labor 3.6% increase
Inflation 13% increase
Increase in Construction Costs
Concrete 3.3% increase
Steel 24% increase in last 4 years
Diesel 55% increase
Special Project
Design Division Environmental and Transportation Services Materials and Research Division Bridge Division
Special Project
Evaluated individual projects October Bid Opening November Bid Opening February Bid Opening Thin Lift Overlay, Slurry Seal, Micro Surfacing
and Seal Coat Projects
October Bid Opening and November Bid Opening
All projects were independently evaluated by a team of individuals
February Bid Opening
All projects were independently evaluated
Preventative Maintenance Projects
Thin Lift Overlay, Slurry Seal, Micro Surfacing and Seal Coat Projects
All projects were evaluated according to the Highway Performance Classification System
Decision Document
Office Holders Recommendations
Deputy Director of Engineering Decision
Sub-Grade, Base and Topsoil Edge Drain Controlled Density Backfill Topsoil Thickness Shoulder Preparation
Sub-Grade, Base and Topsoil
Edge Drain
PROS CONS
Cost With the clay soils, it could create a holding area for water that cannot drain
Water moves very slowly through Non-Permeable Base(Salvage Base)
City requests the edge drain system
Cheap Insurance(to protect Subgrade)
Sub-Grade, Base and Topsoil
Controlled Density Backfill
PROS CONS
Cost The pipe standards are changing and this may be eliminated with the new standard drawings for pipe
Backfill the same day as the pipe is placed The smaller size pipe tends to move when compaction takes place with a tamper/compactor. The flat pipe grades required will not drain if the pipe moves
Sub-Grade, Base and Topsoil
Topsoil Thickness
PROS CONS
Cost Thinner top soil layer
Sub-Grade, Base and Topsoil
Shoulder Preparation
PROS CONS
Cost Non-aesthetically pleasing shoulder
Pavement FAA PG Oil Type Shoulders Entrance Ramps Pavement Width Pavement Thickness Prime Coat RAP
Pavement
FAA
PROS CONS
Cost Decrease Design Life
Safety issues with existing rutting
Increase Rutting and shoving
Pavement
PG Oil Type
PROS CONS
Cost Increase Rutting
Increased Pavement Shoving
Decreases the ability of the Asphalt to flow
Pavement
Shoulders
PROS CONS
Cost Aesthetics – New PCC vs. Old PCC
No change structurally Will Delay Bid Opening
Pavement
Shoulders
PROS CONS
Cost Paved shoulders on North and South ends of project
Will Delay Bid Opening
Pavement
Entrance Ramps
PROS CONS
Cost Only one entry lane
Follows Design Standards Will Delay Bid Opening
Pavement
Pavement Width
PROS CONS
Cost Future TLO Projects
Following Design Guidelines
Pavement
Pavement Thickness
PROS CONS
Cost Shoulders not protected
Decrease Design Life by 5 years and reliability by 10%
Pavement
Prime Coat
PROS CONS
Cost Prime coat will only hold aggregate for 1 year
Lower unit cost by adding multiple projects HBP needs to be placed in 1 year
Low Volume road No HBP surface with new bridge
No surcharge is required and some settlement will occur
Aesthetics
Pavement
Prime Coat
PROS CONS
Cost Aesthetics
Easier to Maintain Temporary Bypass is not sealed
Low Volume road
Pavement
RAP
PROS CONS
Cost Inconsistent RAP material
Use of existing materials
20% RAP use will decrease AC content by 1%
Miscellaneous Construction Median Paving Shared Use Path Guardrail Concrete Reinforcement over Pipes Jersey Barrier Joint Resealing
Miscellaneous Construction
Median Paving
PROS CONS
Cost Aesthetics
No change structurally The 2’ width colored brick pattern behind the curb provides a visual separation of the pedestrian from the vehicle traffic
Miscellaneous Construction
Shared Use Path
PROS CONS
Cost Is not consistent with the 10’ widths on existing Shared Use Paths
8’ is recommended only when the Shared Use Path has limited use
Will Delay Bid Opening
Miscellaneous Construction
Guardrail
PROS CONS
Cost Weed Control
Aesthetics
More Maintenance is required
Miscellaneous Construction
Concrete Reinforcement over Pipes
PROS CONS
Cost Possible settlement over pipe areas
Miscellaneous Construction
Jersey Barrier
PROS CONS
Cost Possible headlight glare
Less of a snow trap Inconsistent with the 42” height recently constructed on I-29 urban corridor in Fargo
Existing concrete barrier on I-94 is 32” Will Delay Bid Opening
Miscellaneous Construction
Jersey Barrier
PROS CONS
Cost Project will be constructed in 2 phases
Safety for Workers
Miscellaneous Construction
Joint Resealing
PROS CONS
Cost Unsealed Joints
Pavement is approximately 30 years old Shortens life of pavement
CPR is a short term fix only Weakens sub-grade
Miscellaneous Construction Detection Loops Signal Heads Decorative Lighting
Miscellaneous Construction
Detection Loops
PROS CONS
Cost Aesthetics - Future loops will have to be sawed and other loops are placed below pavement surface with the concrete reconstruction project
Miscellaneous Construction
Signal Heads
PROS CONS
Cost Inconsistent with existing signaled intersections within the city
Miscellaneous Construction
Decorative Lighting
PROS CONS
Cost It is not consistent with existing conditions
Will Delay Bid Opening
Location of Decision Documents
FileNet
Implemented to evaluate individual projects on ways to save money
Offset rising Construction Costs
Uncertain future of the Highway Trust Fund.