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WK: 208-354-0245 Teton County Engineer 150 Courthouse Drive CELL: 208-313-0245 MEMO Driggs, ID 83422 January 22, 2014 TO: Board of County Commissioners FROM: Jay T. Mazalewski, PE SUBJECT: 1-27-2014 - Road Summit BoCC, On the evening of Monday, January 27, I will review the 5-year road work project list that was presented in April of 2013. Prior to reviewing the project list, I will give a short presentation on the history of our roads, maintenance, and funding. I will not be revisiting the background information provided last April. That information has been updated and is attached for your review. PROJECT LIST: Please review the attached project list. You will see 6 columns on the left hand side of the sheet. These columns are used to help decide which projects are scheduled each year. Location: Corresponds with the 2010 Transportation Update Map Crew Priority: Each R&B crew member identified project on their roads and ranked them ADT: Average Daily Traffic Road Classification: This is the designation of each road 2010 Update Year: When the project was scheduled in the 2010 Transportation Update 2013 Revised Year: The current year the project is scheduled. This information is used along with our budget and available crew to create an achievable schedule of work for each of the first 3 years (see 2014 work schedule). The final year (2017 & future projects) is a list of all other projects that have been identified. Some of these projects are small and may be used as “filler” projects if we have extra time in a construction year. Per the meeting last April, I recommend this project list be revisited every three years, updated, and re-prioritized. This is meant to be a flexible list and projects may be completed sooner or later than scheduled based on funding, time, conditions, or other unforeseen circumstances. COMPREHENSIVE PLAN: Attached are pages from the Comprehensive Plan that reference road/transportation. I believe we are following closely the guidelines and have already accomplished some of the identified goals. AGRICULTURAL ROADS: The BoCC requested ways meet the goals of the Comprehensive Plan and ensure that we are maintaining and improving roads that serve agriculture. The attached Ag Exemption/Road Project map show properties classified as agricultural properties receiving the Ag Exemption Tax status and our road projects. Based on the map it appears that the majority of roadwork completed and proposed, serves agricultural needs. OTHER ITEMS: How to get more work done: Allocate additional funding for more staff or private contractors. Options: 1) We have approximately a $200K surplus of levy funds that have been compiled since the 1st levy. I recommend we increase the levy budget to include these funds for the purpose of improving our gravel roads. (the surplus is due to a higher collection % than anticipated). 2) Increase the Special Rd Levy (note this levy is up for renewal in the spring of 2014) 3) BoCC petition the state for increased revenues Special Projects/BoCC Requests: The BoCC & public appear to focus on certain roads/areas. Options: 1) Dedicate 6% ($45K) of the county portion of the levy to BoCC Special Projects and have each BoCC member direct the funding of 2% of the levy to a project to be completed by private contractors. 2) Dedicate 6% of the county portion of the levy community identified project and hold a lottery to determine which project is funded (need to check w/attorney) SUMMARY: Teton County has seen its population almost double and a construction boom. This increased traffic, on roads not designed to handle these traffic loads, has accelerated the deterioration. As we progress with our projects, less road mileage may get work on some years, due to need for full reconstruction not just overlays or chip seals. My goal is upgrade all of our roads and create a solid foundation under the roads which future generations can build on. Teton County has a significant backlog of road work due to over a decade of underfunding. We have had three construction years with levy funding to begin to make a dent in the backlog but still have a long, long ways to go. To get all of our roads upgraded and maintainable will be a long, slow, but steady process at our current funding level. Patience will be required by all in order to get our transportation network to the level everybody wants. 2 BACKGROUND INFORMATION: Gravel Stabilization (dust control): What: Gravel roads are treated with a 30%-35% solution of magnesium chloride to stabilize the gravel and prevent it from migrating off the surface. Why: Mag attracts moisture which prevents the fines (aka binder) from disappearing and helps lock in the larger aggregate and maintains the travel surface. A stabilized surface loses 1.5 tons of material per year per vehicle trip. An un-stabilized surface loses 2.6 tons of material per year per vehicle trip. This is why we use Mag, dust control is a secondary benefit. Once the traffic count goes below 140, the replacement cost for gravel is cheaper than the cost of the mag. How: A residual amount of mag remains in the gravel each year. Therefore the application rate can be reduced after the first year. We typically apply 0.5 gal/sqyd the first year, 0.4 gal/sqyd year 2, and 0.3 gal/sqyd thereafter. How Much: The Special Road levy pays about $70,000, The SW Budget pays $2,000 for a total of about $$72,000 available for gravel stabilization. This should stabilize approximately 25-27 miles of road in 2014. Where: Attached is a map showing the roads which are proposed to receive mag in 2014. This is the only road treatment which locations are determined solely by road counts, as this is where the taxpayer money is most efficiently used. Additionally, roads to receive Mag should have a good gravel surface or receive a gravel overlay prior to the first application of Mag. 3 Pavement Maintenance (Seal Coat) What: Teton County maintains 76 miles of paved/sealed roads and 7 miles of a paved pathway. Only 26 miles of this are actually pavement. The remaining 46 miles are multiple layers of chip seal on a gravel surface. Asphalt pavement adds structural integrity to the road, a chip seal does not. Here are three typical pavement treatments: Crack Seal: Seal all cracks less than 1/8”, done prior to any other surface treatment Fog/Rejuventor Seal: A light coat of oil which seals smaller cracks and prevents further decay Chip Seal: A coat of oil followed by a cover coat of aggregate to provide traction. Hot Mix Asphalt Overlay: A thin layer of hot asphalt over the existing degraded pavement. Why: All paved/sealed surfaces need regular treatment to maintain the surface. The oils in pavement degrade over time which causes the road to deteriorate. Fog seal last 2-3 years, chip seals last 5-7 years. How: Treatments depend on the road condition and use. Teton County contracts for crack sealing, oil spreading, and hauling of aggregate. We have our own chip spreader to spread the cover aggregate. We offer 1-mile of chip spreading to each of the city’s (at cost). How Much: The Special Road levy budgets about $270,000 for Seal Coats. This will coat between 10-15 miles of road. Estimated costs are: Crack Seal =$ 25K Oil Cost =$150K Aggregate Cost =$ 45K Private Trucking =$ 30K Misc =$ 20K Where: Only roads that are in decent condition that have good bases are chip sealed. Every three years the condition of paved/sealed roads are assessed to determined the next treatment and the remaining service life (last done in summer of 2012). Roads to be seal coated are determined by the ranking the Remaining Service Life, Road Type, and ADT. It is much cheaper to maintain and existing surface than having to replace it. The 2014 sealcoat project have not been determined. Think of the road surface like siding on your house; it is cheaper to paint it every three years than to replace the siding every seven years! 4 Road Reconstruction What: This is full depth excavation and rebuild of a road from the subgrade. Any reconstruction project must be designed for the anticipated traffic loading for the next 20-years and consider the existing sub-grade condition. This is the most expensive and time consuming of road projects. The City of Victor paid approximately $250K to rebuild 0.5 miles of 9500S in 2012 (to gravel surface). Why: A road that was not properly maintained, was not built to handle the traffic loads, or does not have adequate drainage will deteriorate quickly. Many of our roads were not built to handle the current traffic loadings (5000S, 4000N, 500W), additionally a lack of regular maintenance accelerated this deterioration. How: The R&B Department can rebuild roads however larger projects may take away from other project and regular maintenance. Larger projects should be contracted out. How Much: Approximately $135,000 was allocated to reconstruction this year. R&B takes about 4 weeks to rebuild 1 mile of a gravel rebuild, we can rebuild approximately 1 mile a year with our current schedule and staffing levels. Where: E5000S is slated in 2014 rebuild/expansion project for a currently oiled road. The project will be funded through impact fees, grant, and Special Rd Levy. A gravel road rebuild list is attached. Rammell Mountain Rd will be completed this spring and either W6000S or N3000W is slated for summer of 2014.