This section has been prepared in order to demonstrate the process by which the following fees were calculated:
A. Explanation: It is assumed that a brand new road has a design life of approximately fifteen (15) years. Meaning that if new pavement is installed, receives the proper maintenance (crack seal, seal coats, etc.), and is not cut or compromised in any way, it will last approximately fifteen (15) years before another overlay is needed. If the road is cut, however, the design life of the road is compromised. The road is now more susceptible to water getting underneath the asphalt. This allows damage to the road due to freeze/thaw situations as well as degradation of the base and possibly subbase material. The square footage of the excavation site restoration is measured to be the impact on the road. The age of the road being cut has also been considered. If the road is less than two (2) years old, the design life is shortened more than if the road is older than two (2) years old.
For the purpose of calculating the fee, the following assumptions have been made: If a road that is less than two (2) years old is cut, the design life has been shortened by approximately six (6) years (or 40 percent); if a road that is older than two (2) years old is cut, the design life has been shortened by approximately four (4) years (or 25 percent). Also, even though potholes have minimal square footage, the impact on the road is still the same. Therefore, in order to adequately compensate for the diminished road integrity of the road, the fee is the same for all small excavations of one hundred (100) square feet or less. The following equations represent how the fees are being calculated:
(The following variables and equations are for illustration purpose only. For actual figures, see current consolidated fee schedule on file with the city.)
Variables:
NPC | = | New pavement cost = $2.80/s.f. |
SSFF | = | Small square footage compensation factor, less than 2' x 2' = 0.045 |
TSF | = | Total square footage of excavation site restoration |
L2F | = | Roads less than 2 years old factor = 40% = 0.4 |
M2F | = | Roads more than 2 years old factor = 25% = 0.25 |
B. Inspection Fee: This is the cost of the estimated time required for city staff to inspect the work being performed and give additional direction if the work being performed is inadequate.
C. Diminished Road Integrity Fee:
Equations:
Potholes (100 s.f. or less) on roads Less than 2 years old
= (NPC * 100 s.f. * L2F) / SSFF = ($2.80 * 100 s.f. * 0.4) / 0.045 = $112
Potholes (100 s.f. or less) on roads More than 2 years old
= (NPC * 100 s.f. * M2F) / SSFF = ($2.80 * 100 s.f. * 0.25) / 0.045 = $70
Diminished road integrity fee on roads Less than 2 years old
= NPC * L2F * TSF = $2.80 * 0.4 * TSF = $1.12 * TSF
Diminished road integrity fee on roads More than 2 years old
= NPC * M2F * TSF = $2.80 * 0.25 * TSF = $0.70 * TSF
D. Financial Guarantee:
Equation:
Escrow amount = NPC * TSF = $2.80 * TSF
(Ord. 09-02, 3-10-2009)