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Snyder Subdivision
A Proposed Addition to the

City of East Lansing

A Thesis Submitted to
The Faculty of

NiCHIGAN STATL CCLLEGJ

of
AGRICULTUR; AND AL L113 SClflNCL
by
B.G. flyiys W. Reading

Candidates for the Degree of

Bachelor of Science

June 1949

 

‘x’ HESIS

0/

 

Snyder Subdivision

A Frogosed Addition to the City of East Lansing

Before starting on this thesis the two writers

tried to map a plan of action to follow in comrlet-

ing this work.

it was decided to handle the yroblem by divid-

ing it in the following manner:

1.
2.
5.
4.
5.
6.
7.
8.

Reconnaisance Survey

Location Survey

TopOgraphical Survey

Street and Lot Layout

Street and Sidewalk Design
Storm and Sanitary Sewer Design
Water Supply

Engineer's Estimate of Cost of Project

Reconnaisance Survey

Several prospective rare ls of land thought
to be suitable for subdivision were locked at.
The bust of the e were recorded as to location
and owners. After consideration this parcel of
land was selected as being the mcrt likely site
to subdivide.

It is owned by the Snyder Estate and is ad—
ministered by llummer Tnyder, Lansing attorney.
Hence the name Snyder Subcivision.

It was formerly the Inter-City Golf Gourse

although it has not been used as such for a num-
ber of years. Bordering on the City of East Lan-
sing on one side and Coolidge Road on another, it
is readily accessible for development.

The piece of grOperty is quite level, being
at a higher elevation than pr0perties to the South
and West of it. Although it is clay and silt
topsoil with rater standing in several pockets, it
is felt that drainage will be no problem.

The proximity of the East Lanaing Pumping
Station and Water Storage Tank assure adejuate

water pressures.

Location Survey

*s

The Township of Lansing was contacted or
the location of the property which was as fol-
lows:

N 50 acres of W half of SW quarter of Sect-
ion 12.

Of this farcel the South 52.74 acres were
subdivided.

The progerty is bordered by Coolidge Road
on the Test and Touraine Subdivision on the South.
DOVer and Touraine Jtreets terminate at the South
groperty line.

The City hngineer and ways of the City of
Last Landing were consulted for location of ex-
isting utilities and the section corner common to
Sections 11, 12, 13, 14. The city bench mark
at the S3 corner of Harvard and Coolidge Road was

used in obtaining elev tions. Exact location of

this bench mark is shown in the field notes.

Top0grayhical Survey

From a baseline along the edge of Coolidge
Road a closed traverse was run staying apjrcxim-
ately 300 feet inside the rrorerty lines. Interior
angles were repeated six times and distances meas-
ured to the nearest thousandth of a foot.

The traverse was then closed by the use of
latitudes and departures in conjunction with the

tran

(1)

it rule. The error of closure being 0.506 feet
and the accuracy 1/8725. (See field notes for com-
rutations on error and distribution of error.)

From this traverse the torograyhic features
of the land were locat d by transit and stadia rod.
The cross sections were also ylanned from this
trav rse as follows:

Along the South side line AC was measured off every
hundre feet and staked. Along the West side AO
perpendiculars were established at hundred foot
intervals. At the intersections of this grid ele-
vations were taken and at any other foirts deemed
advisable to give accurate contours.

The LCVel Circuit was closed by checking back

in on the City of East Lansing bench mark.

Street and Lot Layout

To be considered for addition to the City
of East Lansing the lots must not be smaller than
5,000 seuare feet. Our develo ment being suburban
and wishing to make the lots as desirable as pract-
icable, our lots have a minimum of 60 feet frontage
and an average size of aprroximately 8,000 square
feet.

There is enough variety in the size and front-
age to relieve monotony and to give the buyer a
selection to fit his needs.

Also for addition the street right-of-way must
be 60 feet wide. This was provided for. An attempt
was made to place the streets both as to utility

and to give an attractive arvearance to the whole

Street and S dewalk D sign

For addition to the City of Last Lansing,
streets must be 50 feet back to back of curb.

It is planned to lay the curb and gutter
and put in a stabilized gravel road bed. After
a period for consolidation the streets V111 be
covered with a 5” layer of bituminous macadam.

The sidewalks, 5 feet wide and iinches thick,
are to be of concrete. A tygical cross-Stction of
the 60 foot right-of-way is shown in detail with

other plans.

Storm and Sanitary Sewer Design

n

specifications for sewers in the City of
East Lansing were obtained from the Ci.y Engin-
eer and are as follows:

1. Catch basin type of inlet to be used

2. Combined sew: system reduired
5. Minimum cover of 7.5 feet re uired

The sewers were placed in an efFOrc to util-
ize the natural sloge of the ground although fair-
ly dnep ditches will be nece;sary to facilitate
the velocity of flow. Our nain outlet, even though
a deep manhole is necessary, is much higher than
the next manhole in the direction of flow and thus
eliminates the negd of a drop nanhole.

Distances between manholes were limited to

400 feet except in two instances and in these ca es

0

there was ro change of grade, direct‘ n or Fire
size. All manholes were placed in the middle of
the street to maintain eiual ease of access from
either side. Catch basins mere placud at street
intersections in such a manner ttat Tatar would
not gather at the crosswalks.

Complete rainfall data was obtained from flue
East Lansin

Weather Bureau and a five year rain-

fall curve was Clotted. The rainfall data was
.1

‘

convert d to intensity of rainfall in incnes per

time of duration

in
5—1-
:1
'f
(.4?-

hour snd the e values plotted 0;.
of each ctcrm.

The area was divided into smaller areas which
would drain into each manhole. a ten minute
inlet time use aetumed for the ar as served by
each manhole. A value of 0.4 was used for the
interviousness coefficient as used in the form-
ula 7=AIR. This is a common value for a built
up reticential district.

The Velocity of flow was kegt bet een 3 and
8 feet per second. In instances wheze there was
a change in the size of pipe the elevation of the
crown was kept the same. In each place there oc-
curs a change in direction there is also a change
in pigs size this taking care of head loss due
to chanée in direction.

The point of concentration of the area is
at manhole 12. Here it was deemed advisable to
use a drop panhole to receive the two incoming

lines.

Water Supply

Location of existing lines in bordering Tour-
aine Subiivision were obtained from the City of

Last Lansing. An 8 inch line runs along Saginaw

St. and 4 inch lines branch off this up Touraine

St., Dover $1., and Coolidge Rd. to the South edge

of Snyder Subdivision.

The Elan is to replace the 4 inch line up
Coolid5e Rd. and Touraine St. by an 8 inch line.
Pressure on the 8 inch line will be about 65 psi,
the gunping station and elevated storage being
close to the subdivision.

Sfecifications of the City of East Lansing
require that:

l. Feeders be not more than 5000 feet apart.

2. Supply lines to fire hydrants not less than

6 inches in residential districts.

5. 6inch cross mains not to exceed 600 feet.

4. Pressure on fire hydrants should not be less

than 20 psi.

fhe following are the estimated rife sizes
to be used:

8 inch up Touraine St. and Coolidge Rd.

6 inch up fiuimby and Whithall Avenues.

4 inch up Park El., Dover El. and Carr Ave.

No fire hydrant is on a dead end line thus

giving a grid that should keep pressures more equal

at different goints.

The maximum demand on any line will be on
auimby Ave., with a 6 inch line, 1150 feet long.
This line will serve 27 lots or at peak development
108 people.

1,020 7/0300 (1 - 0.01 707108)
I 334.4(0.9967)

Fire demand

?54 gal. per min.

Max. rate of Consumption = 100 (2.50) 108
60

 

- 450 gal. per min.
Total re uirement 3.784 gal. per min. .
'Using the Hazen Williams Formula with a C for
Cast Iron pipe of 100, the loss of head on a
6 inch ripe flowing at 749 391. per min. is 70
feet per 1000 feet or 80.5 feet per 1150 feet.
Pressure drop is then I 0.455 (80.5) = 58 psi
Pressure is thus seen to be adeduate, in fact
a little high, but if the rest of this land is to
be subdivided at some future date it will be pos-
sible to connect direct onto the eiiht inch mains

V

and grid the entire plot.

“Lg—L .4 < -1 -Afl_w 4—H

 

Engineer's istimate of Cost of Project

The Engineer's Estimate of the cost of the

project was arrived at in the following manner:

56 Catch basins @ $100
1569' inlet a $1.00

360' of 10" V.C. sewer pipe @ $1.60

1080' " 15" " " " a $2.5

1125' " 18" " " " a $5.00
950' " a1" ' " " a $4.25
560' " 94" " " ” a $5.00
550' " 50n ' " " a $5.00

1265' Manhole @.$l.4l
plus 3' for those over 10'
plus 3' for drop manhole
1780' of 8" C.I. water pipe @ $2.90
aasa' " 6' ' " " a $2.00
1969' " 4” " " ‘ 0 £1.80
6 Fire hydrants 6'r (5 hose) @ $150
6 Water Valves 6" @ $50
5 n u 4" @ $40
10114' Curb & Gutter @ $1.40
5,214 sq.yds. Sidewalk 4" @ $1.35
Grading

2087 cu.yds. Gravel @ $5.00

$ 5500.00

15 2.00
576.00
2700.00
3575.00
4080.00
1800.00

2160.00

2407.50
5162.00
4578.00
3544.00
900.00
300.00

200.00

14159.00

6952.00
500.00

6261.00

15592 sq.yds. Bituminous paving 0 $0.75 12444.00

Cost of ilatting

2400.00

 

$79,460.50

Legal Fees and Contingencies 10% 5 7945.00

I

 

Total istimates Cost 3 87,406.50

With 125 lots this makes the average cost
per lot for subdividing t710.5a. Additional items
such as the owners evaluation of his land, ovners
profit and sales ccnmissions for selling lots should
bring the price of each lot to around $1,000.

Unit costs were taken from ”Seely's" Specif-
ications and Costs. These are based on the Enrin-
eering Nets Record price index for Dec. 1043. Our
costs were adjusted to current price index from the

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