HomeMy WebLinkAboutSDP201900081 Review Comments Minor Amendment 2020-08-14PROJECT: SDP201900081 -TANDEM FRIENDS SCHOOL —MIA —8/14/20
Engineering comments (David James):
1. The VSMP plan is currently under review and approval is necessary prior to site amendment
approval. Comment still valid.
3. Remove the SWM & ESC plan sheets from the site plan amendment (Sheets 8, 12-14).
Addressed.
4. Cover: Provide date of field verification of existing site conditions: Topography should be visually
field verified by within the last year. Addressed.
5. Show drainage profile info and separation distances. Show the separation distance between
existing sewer and storm pipe 2-1.
Addressed.
6. The proposed travelway/driveway extension is subject to county engineer approval. [DSM, pg.
161 See comment 8.
Addressed.
7. Continue grading for proposed extension. -Cross-slope should follow minimum standards for
travelways. See comment 8.
Addressed.
8. If the intent is to use this as an emergency vehicle access, then the entrance and travelway will
have to meet minimum design standards.
a. I measured the entrance grade or cross -slope to be about 11%. This exceeds the
minimum grade allowable of 4% for 40ft.
Use of existing entrance is acceptable by F/R.
b. The entrance radius should be 25ft min.
Use of existing entrance is acceptable by F/R.
c. You're providing a 9ft wide gravel travelway for the first 170ft length of access. The
minimum travelway width should be 12ft on a one-way aisle, but for an emergency
vehicle it would need to be 20ft.
The travelway requirements do not apply to the maintenance access. If F/R accepts
what is proposed for the access, then Engineering has no objection.
d. The next 220-ft length of access is a propriety grass pavement system that is 20ft wide.
The cross -slope appears to be generally high up to 20%. I'm not sure about the cross -
slope requirement for the grass paver system, but the maximum allowable grade is 10%.
F/R finds this acceptable per 7/10 email.
9. Sheet C5 — The grading exceeds the 2:1 (max) allowed, near corner of biofiltel Addressed.
10. Remove mention of 'conservation area' from the plan sheet (i.e. note 13. A. on front cover).
11. Provide safety railing for retaining wall over 30" tall.
Please refer to Sec. 18-4.12.17 — Minimum design requirements and improvements for vehicle
access aisles