HomeMy WebLinkAboutCAPITAL IMPROVEMENTS - 01/15/1985 - SUMMARY OF CAPITAL IMPROVEMENTS
COMMITTEE MEETING
Tuesday, January 15, 1985
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BOARD MEMBERS PRESENT STAFF PRESENT
Michael Tosto, Committee Chairman Ray Peterson, Village Engineer
Ronald Chernick, Committee Member
Stephen Uhlarik, Committee Member
The meeting was called to order in the Trustees' conference
Room at 6:05 p.m. by Michael Tosto. The purpose of the meeting was to discuss
curb and gutter standard and swale drainage.
I. RESIDENTIAL CURB
The Committee briefly discussed a revised residential curb and
gutter design prepared by the Engineering Department. The
new curb and gutter has a three inch high roll curb, whereas,
the old curb and gutter has a four and one-half inch curb.
Everything else about the curb remains the same.
After discussing the. merits of the change, especially the
reduced jolt when a car rides over the new curb, the
Committee concurred in its use. The ordinance is to be
revised to provide for this type M-3.12 curb and gutter as
shown on the attached exhibit.
The Committee reiterated that sunken aprons in developments
where improvements have been accepted shall be replaced by
the property owner if the owner wants it replaced. The
Village will replace the apron at our cost only if the apron
has deteriorated badly because the Village has a manhole or
vault in the apron.
In addition, depressed curb and handicapped sidewalks
shall be constructed at all locations where the curb at the
sidewalk must be replaced.
II. SWALE DRAINAGE
The Committee discussed lot grading and drainage as
discussed in the Village Engineers memo to the Village Manager
dated October 8, 1984 (see attached) . As such, they agreed
unanimously to present an amended ordinance to the Village
Board for consideration.
cont'd.. .
Page 2
The only change will be to change the minimum longitud-
inal grade of the swale to 1.0 percent from 0.4 percent.
The other recommendation in the memo will not be considered
further.
Respectfully submitted,
Ray L. Peterson, Village Engineer
RLP:pp
cc: President 6 Board of Trustees
✓ Village Manager
Public Works Director
12" 7"
I
2 1/2" 3"
6"R
CZ ` Two - #4 Continuous
" Rebar (Typical
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6" I 6" t 7"
M-3 . 12 CURB & GUTTER DETAILS
RESIDENTIAL AREAS ONLY
t = 9" adjacent to flexible pavement.
= thickness of pavement adjacent to rigid pavements.
A 2" compacted granular sub-base shall be placed under the concrete curb and gutter
NOTES
1) Compressive strength at 14 days shall be a minimum of 3500 psi.
2) 1/2" preformed expansion joints conforming to the cross-section of the
curb and gutter shall be placed at 50' intervals , at points of curvature of short-
radius curves , at construction joints and where specified by the Village Engineer.
Two 3/4" steel dowel bars (18" long) with a 9" steel sleeve at one end of each bar
shall be provided at each expansion joint and centered horizontally across the join
3) Contraction joints (2" deep) shall be provided on maximum 20' centers
between exoansion joints.
4) The curb shall be depressed at all sidewalk ramps for the handicapped.
5) If concrete pavement is constructed, 1/2" steel tie bars shall be
installed 0 2' 6" centers to tie the curb and gutter to the pavement.
6) At all drainage structures in the curb and gutter, contraction joints
(2" deep) shall be placed in the curb and gutter five feet on each side of the
structure and at the center of the structure.
7) A Neenah Type R-25028 w/ Type "D" grate, East Jordan 1022-2 w/
Type "142" grate, or equal (as approved by the Village Engineer) , Frame
and Grate shall be provided at all drainage structures within the Curb
and gutter.
8) Section 616 of the latest Illinois Department of Transportation
"Standard Specifications for Road and Bridge Construction" shall be followed
unless pre-empted by above requirements.
October 8, 1984
TO: Charles A. Willis, Village Manager
FRO14:
Ray J Peterson, Village Engineer
SUBJECT: SUBDIVISION CONTROL ORDINANCE
- REVISIONS TO DRAINAGE AND GRADING
BACKGROUND
Section 8.005 amended Storm Drainage of the Municipal Code
requires a minimum rear yard swale grade of 0.4 percent. This ordinance
was passed on April 13, 1976. Only recently has this ordinance been
tested and it has been found to be unsatisfactory.
Parkview Heights Subdivision (Biesterfield & Rohlwing) has been
engineered with considerable lengths of rear swale grades at 0.4 percent.
Within the last several months we have received over 10 complaints from
residents on Debra and Cass Lanes about standing water in their yards.
The summer has been dry and, although many of these homeowners
were watering to establish new sod, I would not have expected such an
abundance of complaints if the ordinance worked. The design did meet
minimum ordinance requirements (0.40%) and the drainage did not work
well. A field survey showed minor irregularities in the construction
which affected the drainage but were not entirely to blame.
Although other developments have been designed subsequent to
the ordinance establishing the 0.4 percent minimum, our review of
these plans show no existing development using the minimum swale grades.
Other developments have been designed using 0.7% to 2e swale grades.
REFERENCES
The Department has been in contact with several communities and
have examined their grading and drainage ordinances. The attached
Exhibit A summarizes these requirements.
RECOMMENDATION
After having investigated possible alternatives to resolve this
matter, I recommend Section 8.005 Storm Drainage of the Municipal Code
be amended as follows:
Page 2
1. Increase to 1.0% from 0.4% the minimum grade of the
swale flowline - Item C.
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2. Replace the current Item D with -
"The rear yard shall be graded longitudinally(from the
house to the rear lot line) so their is a usable area
for patio, pools, play areas, etc. near the house.
The rear yard shall be graded at a minimum of 2% and a
maximum of five percent from the house to a point 10 feet
from the swale in the direction toward the structure under
consideration. The remaining 10 foot of the rear yard
shall be graded from 2% to 5% where possible, but the
maximum grade shall not exceed a 3:1 slope.
3. Add the following item -
"Inlets and storm sewers shall be provided in the swales
when either stormwater would exceed the limits of the
drainage easement for the design year storm or the
elevation difference between the finished grade at the
founation and the swale grade is more than four feet".
(The four feet differential is based on a typical 30'
deep backyard - the first 20' from the house at 5% grade
plus the remaining 10' easement at a 3:1 slope) .
I have not discussed these recommendations with developers nor
their engineers. I'm sure they can provide perspectives as designer
and contractor which will be important to obtain if the village is
receptive to these or other changes to the ordinance.
RLP.pp
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