River Ridge Add-CS 930915 IVIEMORANDUM
To: Taryon Bowman, Planning and Zoning Coordinator
From: Kenneth M. Griffin, P.E., City Engineer
RE: FINAL Engineering Comments for DRC 8126193 & 912193
Date: September 15, 1993
13. River Ridge Addition preliminary plat - located south of Sandy Lake Road west of
Riverchase Drive.
1. Thc correct scalc should bc sho',vn in thc lov,,cr right hand corncr.
2. Drainage plans and contour information should be provided. The location of the
floodplain along the rear of lots 1-18, Block A cannot be verified without that
information.
3. The minimum center line radius is 425 foot. There are five center line radiuses less
than that, so a variance should be requested.
4. It is my opinion that it will be very difficult to build on Lots 16 and 17, given the
setback and floodplain at the rear of the lots. Some consideration should be given
to combining lots 16 and 17 into one lot creating a wider lot for construction that
would be able to contain future amenities such as a swimming pool.
5. All drainage and utility easements should be shown. Also, the drainage system
shown on lots 8 and 9, Block A will necessitate an off-site easement from the golf
course.
6. A floodplain development permit will be required.
7. The floodplain that encroaches on lots 1-18, Block A should have dimensions from
each corner of the lot from the rear of the lot to the floodplain.
8. Minimum finish floor elevations should be provided for lots 1-18, Block A.
9. Variance for the deletion of alleys for lots 1-18, Block A and Lot 12, Block D
should be provided.
10. A variance should be requested for the length of the cul-de-sac between Block A and
Block B.
11. This is labeled as a preliminary plat and as such it should not contain the utilities.
Utilities should be provided on separate sheets entitled water, sewer, drainage, etc.
etc.
12. The other plats in this area have dedicated a fifteen foot landscape easement adjacent
to Riverchase Drive. Therefore, it appears as though a fifteen foot landscape
easement should also be provided on this plat adjacent to Riverchase Drive for the
entire length of the subdivision. This will affect the various lots adjacent to
Riverchase Drive.
13. The land immediately north of lot 12, Block D indicates that it is to be dedicated,
Please comment to whom and for what.
14. The property north of lot 12, Block D is part of this subdivision and as such it is my
opinion that the screening wall should be built all the way to Sandy Lake Road.
15. Off-site easements will be required from DP&L for the drainage system stubbed out
between lot 18, Block A and Lot 11, Block B and between Lot 8, Block D and LOt
12, Block B. If dirt is brought in to fill in the low areas, then a flood study will be
required.
16. Has consideration been given to the wisdom of locating a subdivision beneath the
DP&L towers.
17. Escrow is required for the footage adjacent to Sandy Lake.