|
B.
Residential
7.
Central Sewer Systems
Approximately seven percent of the watershed has access to
a centralized sewer system serving 60 percent of the total population.
The remainder of the watershed is served by on-site wastewater treatment.
Figure 30 below summarizes access to central sewer in the watershed.
|
Figure
30: Central Sewer Access
|
|
|
Total
Acres
|
Total
People
|
Total
Homes
|
|
Sewered
Areas
|
12,358
|
43,315
|
15,497
|
|
Entire
Watershed
|
355,608
|
71,456
|
25,836
|
|
Percentage
Sewered
|
3.48%
|
60.6%
|
60.0%
|
Central sewer service is concentrated along the northern
and eastern boundaries of the watershed in the Union,
Madison
, and
Franklin
Counties
. A number of small subdivisions and
mobile home parks have individual wastewater treatment facilities, or package
plants. Several of these package
plants have violated Ohio EPA point source permits in recent years and are
pollution sources (See Part IV, NPDES Permits). The
City of
Columbus
receives wastewater from several satellite systems, four of which are in the
Darby Watershed; Timberlake, Young Estates, Hilliard, and
Village
Park
. When a rainfall event occurs the
Columbus
sewer lines are often too full to receive additional water from the satellite
systems. This causes these systems
to utilize their sanitary sewer overflows (SSOs) which allows water to escape
the full sewer lines into area ditches, streams, streets, or people’s homes.
These sewer overflows occur during most rain events and contribute
pollution to streams and ditches in
Franklin
County. Only the city of
Columbus
has a permit with Ohio EPA because it is the end discharger.
No record of violations exists for the satellite systems.
Ohio EPA is now working to create permits for SSOs (OEPA, 2005).
All areas in the watershed served by centralized sewer are illustrated in
Map 13 and in Figure 31.
|
Figure
31: Areas Served by Central Sewer in the Watershed
|
|
Name
|
People
|
Homes
|
Acres
|
County
|
Violation*
|
Number
|
|
Other Notes
|
|
Columbus
Metro Area
|
14,305
|
5,820
|
3,024.64
|
Franklin
|
Discharge
to
Scioto
|
|
West Jefferson
|
4,302
|
1,694
|
668.92
|
Madison
|
Yes
|
110
|
|
Lake
Darby
Estates
|
4,057
|
1,359
|
1,324.28
|
Franklin
|
Yes
|
9
|
|
Pickaway
Correctional Institute
|
3,667
|
5
|
1,246.63
|
Pickaway
|
No
|
0
|
|
Plain
City
|
2,884
|
1,221
|
933.11
|
Union
|
Yes
|
12
|
|
Darbydale***
|
1,773
|
684
|
424.80
|
Franklin
|
Not
yet operating ***
|
|
Mechanicsburg
|
1,744
|
761
|
661.50
|
Champaign
|
Yes
|
128
|
|
North Lewisburg
|
1,594
|
699
|
598.78
|
Champaign
|
Yes
|
287
|
|
Marysville
|
1,514
|
458
|
1,203.02
|
Union
|
Discharge
to Mill Cr.
|
|
Village
Park
|
800
|
269
|
80.58
|
Franklin
|
No
permit see above
|
|
Timberbrook
Subdivision
|
750
|
278
|
171.71
|
Franklin
|
Yes
|
121
|
|
Green
Meadows
Mobile
Home Park
|
687
|
256
|
45.75
|
Madison
|
Yes
|
256
|
|
Clark
Lake
Shore
**
|
648
|
240
|
259.51
|
Pickaway
|
Yes
|
60
|
|
Milford
Center
|
626
|
241
|
226.25
|
Union
|
Tied
to Marysville
|
|
Timberlake
|
539
|
189
|
151.20
|
Franklin
|
No
permit see above
|
|
Fox
Lair
Mobile Home
Park
**
|
439
|
166
|
37.19
|
Pickaway
|
Yes
|
65
|
|
New
California
|
341
|
119
|
324.04
|
Union
|
Tied
into Marysville
|
|
Woodstock
|
317
|
105
|
173.86
|
Champaign
|
Tied
to
N. Lewisburg
|
|
Darbyville
|
300
|
102
|
309.41
|
Pickaway
|
Yes
|
8
|
|
Oakhurst
Knolls
|
300
|
106
|
63.37
|
Franklin
|
Yes
|
20
|
|
Orient
|
269
|
102
|
79.42
|
Pickaway
|
Tied
into PCI
|
|
Canaan
Community Mobile Homes
|
250
|
95
|
33.91
|
Madison
|
Yes
|
361
|
|
Jefferson
Lodge
Mobile
Home
Park
|
229
|
122
|
37.87
|
Madison
|
Yes
|
111
|
|
Young
Estates
|
213
|
79
|
36.09
|
Franklin
|
No
permit see above
|
|
Big
Darby
Mobile
Home
Park
|
168
|
66
|
12.76
|
Pickaway
|
No
Discharge
|
|
Dot-Mar
Mobile
Home
Park
**
|
Included
in Darbydale data
|
Pickaway
|
Yes
|
285
|
|
Suburbans
Mobile
Home
Park
|
151
|
73
|
53.55
|
Madison
|
Yes
|
94
|
|
Greentree
Mobile
Home
Park
|
128
|
65
|
13.05
|
Madison
|
Yes
|
94
|
|
Kimberley
Woods
|
97
|
35
|
37.89
|
Union
|
Tied
to Marysville
|
|
Darby
Meadows
|
89
|
25
|
25.85
|
Union
|
Yes
|
85
|
|
Picket
Fences
Mobile
Home
Park
|
41
|
21
|
3.94
|
Madison
|
Yes
|
141
|
|
Wissalochichan
Sewer District
|
33
|
21
|
12.64
|
Madison
|
Yes
|
45
|
|
Crottinger
Estates
|
30
|
11
|
28.10
|
Union
|
Yes
|
180
|
|
Reflections
Subdivision
|
30
|
10
|
54.86
|
Union
|
Onsite
wetlands
|
|
Totals
: 33 Areas Served
|
43,315
|
15,497
|
12,358
|
|
|
|
*Violations were from 1/2000 to
3/2005,
**Will
be tied into Upgraded plant at Pickaway Correctional Institute
***New Darbydale plant will
eliminate failing – Pleasant Acres,
Community
Gardens
, and Oak Hills Mobile Homes
|
Higher density development in the watershed is largely
influenced by access to centralized sewer systems.
The Hellbranch watershed is working to develop a plan to address the
further extension of water and sewer service into the Hellbranch watershed in a
manner that best protects the water resources of that area.
When this is complete, future development can be expected in this region.
Additionally, Union and
Logan
counties are working to install a regional wastewater treatment plant to serve
four communities and several industrial companies that serve Honda.
The initial flow of the plant is expected to be around 300,000 gpd, but
the plant is going to be sized to handle 700,000 gpd.
With this additional capacity new development is expected in the
headwaters of the Darby Watershed.
The communities of
Plain
City
, West Jefferson, Marysville, and
Columbus
have completed a 201 Plan through the Ohio EPA.
A 201 defines the current service areas for centralized water and sewer.
In addition it defines a 20 year service area that the community plans to
service (See Map
14).
 
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