Role & Authority
CEMCON, Ltd. (Consulting Engineers, Land Surveyors & Planners) is the engineering firm that calculated the cost-share allocation percentages for the Prestonfield HOA stormwater management facilities. Their involvement is not discretionary — it is mandated by Paragraph 13 of the Non-Exclusive Permanent Easement Agreement recorded October 11, 2002 (DuPage County Document No. R2002-268796), which specified that CEMCON would perform the cost calculations based on proportionate runoff from each tributary property.
Their analysis produced the 1.953338%/acre formula and the Lot 218 / Lot 220 basin breakdown that underpins all current cost-share billing.
Known Contacts
| Name | Role | Era |
|---|---|---|
| Randall W. Bus, P.E. | CEO | Confirmed July 2019 and February 2020 |
Address: 2280 White Oak Circle, Suite 100, Aurora, Illinois 60502-9675 Phone: 630.862.2100 | Fax: 630.862.2199 | Website: www.cemcon.com
Related Topics
cost-share-arrangement, cost-sharing-percentages
Engagement History
| Date | Event |
|---|---|
| 2002 | CEMCON performed the original stormwater runoff analysis that established the proportionate cost-share basis for Lot 218 (northerly SWMF) and Lot 220 (southerly SWMF). Mandate encoded in the 2002 easement agreement, Paragraph 13. |
| 2019-07-17 | Randall W. Bus submitted initial cost-share analysis proposal to Dan Grahn (PSI) — fee $2,600–$2,900 + $1,800 retainer. CEMCON had located the archived 2002 files but identified four subsequent replatting events requiring expanded work. Source: cemcon-proposal-2020-02-21 |
| 2020-02-21 | Expanded proposal submitted to Julie Maggio (PSI) — fee $7,200–$8,400 plus ~$250–$300 reimbursables. Scope: on-site drainage reconnaissance, Exhibit Map by P.I.N., full parcel genealogy for all tributary properties. Source: cemcon-proposal-2020-02-21 |
| 2020-05-15 | CEMCON cost-share percentages emailed to Board by PSI — confirms CEMCON produced actionable figures by mid-May 2020. Source: raw/other/PHA-297 - To Do List - 5.14.2020.pdf |