HomeMy Public PortalAboutExhibit MSD 37H - MSD Stormwater Prioritization Scoring ExamplesMSD Stormwater Projects Prioritization System
Revised Benefit Points Allocation Schedule
PROJECT NAME: Amherst -Blackberry 7500 Block Channel Improvements (UCMB-120) (2007079P) DATE: 2/5/2007
PROBLEM SOLVED CATEGORY
Note: Problem points are awarded only for those problems solved by the proposed solution.
1.0 STREAM
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1.1.1. Structure Flooding
Chronic
(<=2-Yr)
Flooding
Frequent
(>2<=1.5 Yr)
Flooding
Infrequent
(>15-Yr)
Flooding
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Habitable 1st floor, residential; includes spaces with
mechanical equipment (1 lot per structure)
Address:
300
150
25
Basement (1 lot per structure)
Address:
200
100
15
Attached Garage (1 lot per structure)
Address:
100
50
8
Misc. structures including patio/decks, pools, sheds, tennis
courts, detached garages, etc.(1 lot per structure)
Address:
50
25
4
Industrial, office, commercial and warehouse
(1 lot per 2,500 sf of floor space flooded)
Address:
300
150
25
Yard Flooding (1 per lot)
Address:
10
5
0
1 1 2 Roadway Flooding (allocate 1 lot per 250' of roadway
impacted & 2 lots per intersection impacted)
Emergency Access restricted (>12" water over only access
route to habitable structure), pts per structure
Address:
200
100
15
Traffic obstruction (> 6" of water) on arterial street
Address:
50
25
4
Traffic obstruction (> 6" of water) on collector street
Address:
25
12
2
Traffic obstruction (> 6" of water) on residential street
Address:
10
5
1
1.2. EROSION
1.2.1. Threatening Structure
(Ratio=Height of bank / distance from structure)
Habitable structures, residential (1 lot per structure)
Address: 7591 Amherst
300
200
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50
Misc structures including pools, patio/decks, sheds, tennis
courts, detached garages, etc.(1 lot per structure)
Address: 3 Graves at 848 North and South
Industrial, office, commercial and warehouse
(1 lot per structure)
Address:
150
300
3
100
200
25
50
450
1.2.2. No. of lots (from 1.2.1) on outside of bend
2
lots
10 points per lot
20
1.2.3. Threatening Roadway (allocate 1 lot per 250' of roadway
impacted & 2 lots per intersection impacted)
Arterial Road:
Address:
75
0
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in
in
12.
0
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Collector Road:
Address:
Residential Road:
Address:
35
25
20
12
6
10/01/06 1 of 3
MSD Stormwater Projects Prioritization System
Revised Benefit Points Allocation Schedule
PROJECT NAME: Amherst -Blackberry 7500 Block Channel Improvements (UCMB-120) (2007079P) DATE: 2/5/2007
CONTINUED:
2.0 STORM SEWER 1 OVERLAND FLOW
2.1. FLOODING
PROBLEM SOLVED CATEGORY, CONT.
Note: Problem points are awarded only for those problems solved by the
proposed solution.
2.1.1. Structure Flooding
Chronic
(<=2-Yr)
Flooding
Frequent
(>2<=15-Yr)
Flooding
Infrequent
(>15-Yr)
Flooding
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Habitable 1st floor, residential; includes spaces with
mechanical equipment (1 lot per structure)*
Address:
350
250
65
Basement (1 lot per structure)*
Address:
250
200
50
Industrial, office, commercial and warehouse
(1 lot per 2,500 sf of floor space flooded)*
Address:
300
200
50
if there is an existing public system and points are taken for
any of the 3 items above, add 50 points.
Attached Garage (1 lot per structure)
Address:
Existing System YIN
100
75
25
Misc. structures including patio/decks, pools, sheds, tennis
courts, detached garages, etc.(1 lot per structure)
Address:
50
35
12
Yard Flooding (1 per lot)
Address:
10
6
0
2.1.2. Roadway Flooding (allocate 1 lot per 250' of roadway
impacted & 2 lots per intersection impacted)
Emergency Access restricted (>12" water over only access
route to habitable structure), pts per structure
Address:
200
150
25
Traffic obstruction (> 6" of water) on arterial street
Address:
50
35
6
Traffic obstruction (> 6" of water) on collector street
Address:
25
15
2
Traffic obstruction (> 6" of water) on residential street
Address:
10
6
1
Ponding (per ponding area)
Address:
No. Ponds:
Points/pond:
5
2.2. Moderate Risk Erosion of misc. structures
Address:
No. Lots:
Points/lot:
20
2.3. Yard Erosion (1 per lot)
Address:
No. Lots:
Points/lot: 10
2.4. Age of Existing System
Points for Age
>50 yrs
(30 pts)
26-50 yrs
(15 pts)
<25 yrs
(0 pts)
Note: Problem points are awarded only for those problems solved by the proposed solution.
TOTAL PROBLEM POINTS
520
10/01/06
2 of 3
MSS Stormwater Projects Prioritization System
Revised Benefit Points Allocation Schedule
PROJECT NAME: Amherst -Blackberry 7500 Block Channel improvements (UCMB-120) (2007079P) DATE: 2/5/2007
CONTINUED:
SOLUTION BENEFIT CATEGORY
I
3.1. Reduction of flowrate leaving site
% reduction of
peak
flowrate :
Max points:
1000
3.2. Combines smaller projects into regional solution (see note)
No. Add'l
Projects:
Points per
Add' Proj.:
50
4.0 ENVIRONMENTAL I WATER QUALITY
4.1. Addresses pollutants:
No. Units
Points per Unit
Bioswales
PER 100 LF
10
Forebays
AC
200
Wet Ponds
AC
100
Wetlands
AC
50
Biostabilization of banks (per bank)
1
PER 100 LF
10
10
Riffle Pool Complex
PER 100 LF
10
4.2. Eliminates combined sewer (per project)
EA
100
Eliminates inflow into sanitary system (1 each per basement
4.3. flooded, yard vent overtopped, street inlet or driveway drain
connected to sanitary/combined system, etc.)
EA
10
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5.1. Ease of Implementation (No. of Easements)
0
0 fl.
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Points for Easements
10
10
5.2. Recreational/Educational
Yes = 100,
no=Opts
TOTAL SOLUTION POINTS
20
TOTAL BENEFIT POINTS
540
Note: A regional solution combines several smaller projects into a watershed or subwatershed solution.
TOTAL COST IN THOUSANDS=
BENEFIT/ COST RATIO= TOTAL POINTS! TOTAL COST IN THOUSANDS=
Place "X" in one box below:
MSD Project
Project by Others
475
1.14
10/01/06
3 of 3
MS_ Aormwater Projects Prioritization System
Revised Benefit Points Allocation Schedule
PROJECT NAME: Burton - Walton Storm Sewer
DATE: 8/17/2009
PROBLEM SOLVED CATEGORY
Note: Problem points are awarded only for those problems solved by the proposed solution.
Chronic
(<=2-Yr)
Flooding
Frequent
(>2. 15-Yr)
Flooding
Infrequent
(>15-Yr)
Flooding
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1.0 STREAM
1.1. FLOODING
1.1.1. Structure Flooding
Habitable 1st floor, residential; includes spaces with
mechanical equipment (1 lot per structure)
Address:
300
150
25
Basement (1 lot per structure)
Address:
200
100
15
Attached Garage (1 lot per structure)
Address:
100
50
8
Misc. structures including patio/decks, pools, sheds, tennis
courts, detached garages, etc.(1 lot per structure)
Address:
50
25
4
Industrial, office, commercial and warehouse
(1 lot per 2,500 sf of floor space flooded)
Address:
300
150
25
Yard Flooding (1 per lot)
Address:
10
5
0
Roadway Flooding (allocate 1 lot per 250' of roadway
1.1.2. impacted & 2 lots per intersection impacted)
Emergency Access restricted (>12" water over only access
route to habitable structure), pts per structure
Address:
200
100
15
Traffic obstruction (> 6" of water) on arterial street
Address:
50
25
4
Traffic obstruction (> 6" of water) on collector street
Address:
25
12
2
Traffic obstruction (> 6" of water) on residential street
Address:
10
5
1.2. EROSION
1.2.1. Threatening Structure
(Ratio=Height of bank / distance from structure)
Habitable structures, residential (1 lot per structure)
Address:
0
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00 n
300
J
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0
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g
200
0
J
0
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50
Misc structures including pools, patio/decks, sheds, tennis
courts, detached garages, etc.(1 lot per structure)
Address:
150
100
25
Industrial, office, commercial and warehouse
(1 lot per structure)
Address:
300
200
50
1.2.2. No. of lots (from 1.2.1) on outside of bend
2
10 points per lot
1.2.3. Threatening Roadway (allocate 1 lot per 250' of roadway
impacted & 2 lots per intersection impacted)
Arterial Road:
Address:
75
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50
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J
0
z
0
C
O
ao
12
O
J
0
z
Collector Road:
Address:
35
25
6
Residential Road:
Address:
20
12
3
10/01/06 1 of 3
C4, Stormwater Projects Prioritization System
Revised Benefit Points Allocation Schedule
PROJECT NAME: Burton - Walton Storm Sewer
CONTINUED:
DATE 6/17/2009
2.0 STORM SEWER 1 OVERLAND FLOW
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CV
PROBLEM SOLVED CATEGORY, CONT.
Note: Problem points are awarded only for those problems solved by the
proposed solution.
2.1.1. Structure Flooding
Chronic
(2-Yr)
Flooding
Frequent
(>2�15-Yr)
Flooding
Infrequent
(>15-Yr)
Flooding
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2
Habitable 1st floor, residential; includes spaces with
mechanical equipment (1 lot per structure)*
Address:
350
250
65
Basement (1 lot per structure)"
Address: 8657 Burton
250
200
1
50
200
Industrial, office, commercial and warehouse
(1 lot per 2,500 sf of floor space flooded)*
Address:
300
200
50
If there is an existing public system and points are taken
for any of the 3 items above, add 50 points.
Existing System Y/N
Attached Garage (1 lot per structure)
Address:
100
75
25
Misc. structures including patio/decks, pools, sheds, tennis
courts, detached garages, etc.(1 lot per structure)
Address:
50
35
12
Yard Flooding (1 per lot)
Address: 8661 Burton Avenue
10
1
6
0
10
2.1.2. Roadway Flooding (allocate 1 lot per 250' of roadway
impacted & 2 lots per intersection impacted)
Emergency Access restricted (>12' water over only access
route to habitable structure), pts per structure
Address:
200
150
25
Traffic obstruction (> 6" of water) on arterial street
Address:
50
35
6
Traffic obstruction (> 6" of water) on collector street
Address:
25
15
2
Traffic obstruction (> 6" of water) on residential street
Address: 8661 Burton Avenue
10
1
6
1
10
Ponding (per ponding area)
Address:
No. Ponds:
Points/pond:
5
2.2. Moderate Risk Erosion of misc. structures
Address:
No. Lots:
Points/lot:
20
2.3. Yard Erosion (1 per lot)
Address: 8661 Burton, 8657 Burton
2.4. Age of Existing System
Points for Age
No. Lots:
>50 yrs
(30 pts)
2
Points/lot:
26-50 yrs
(15 pts)
10
<25 yrs
(0 pts)
20
Note:
roblem points are awarded only for those problems solved by the proposed solution. TOTAL PROBLEM POINTS
240
10/01/06 2 of 3
Stormwater Projects Prioritization System
Revised Benefit Points Allocation Schedule
PROJECT NAME: Burton - Walton Storm Sewer
CONTINUED:
DATE: 8/17/2009
SOLUTION BENEFIT CATEGORY
J
o
raaa,
W
CC
3.1. Reduction of flowrate leaving site
% reduction
of peak
flowrate :
Max points:
1000
3.2. Combines smaller projects into regional solution (see note)
No. Add l
Projects:
Points per
Add'I Proj.:
50
4.1. Addresses pollutants:
No. Units
Points per Unit
Bioswales
PER 100 IF
10
Forebays
AC
200
Wet Ponds
AC
100
Wetlands
AC
50
Biostabilization of banks (per bank)
PER 100 LF
10
Riffle Pool Complex
PER 100 LF
10
4.2. Eliminates combined sewer (per project)
EA
100
Eliminates inflow into sanitary system (1 each per basement
4.3. flooded, yard vent overtopped, street inlet or driveway drain
connected to sanitary/combined system, etc.)
1
EA
10
10
5.1. Ease of Implementation
a
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a.
O
A
Points for Easements:
20
20
5.2. Recreational/Educational
Yes = 100,
no=Opts
TOTAL SOLUTION POINTS
30
TOTAL BENEFIT POINTS
270
Note: A regional solution combines several smaller projects into a watershed or subwatershed solution.
TOTAL COST IN THOUSANDS=
BENEFIT/ COST RATIO= TOTAL POINTS/ TOTAL COST IN THOUSANDS=
Place "X" in one box below:
f X MSD Project
Project by Others
210
1.29
10/01/06 3of3
MSD Stormwater Projects Prioritization System
Revised Benefit Points Allocation Schedule
PROJECT NAME: Deliwood Creek Storm Channel (MCDW-150)
DATE: 7/7/2009
PROBLEM SOLVED CATEGORY
Note: Problem points are awarded only for those problems solved by the proposed solution.
Chronic
(<=2-Yr)
Flooding
Frequent
(>2<=15-Yr)
Flooding
Infrequent
(>15-Yr)
Flooding
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2 AI
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Total Points
1.0 STREAM
0
z
5
0
0
U-
1.1.1. Structure Flooding
Habitable lst floor, residential; includes spaces with
mechanical equipment (1 lot per structure)
Address:
300
150
25
Basement (1 lot per structure)
Address:
200
100
15
Attached Garage (1 lot per structure)
Address:
100
50
8
Misc. structures including patio/decks, pools, sheds, tennis
courts, detached garages, etc.(1 lot per structure)
Address:
50
25
4
Industrial, office, commercial and warehouse
(1 lot per 2,500 sf of floor space flooded)
Address:
300
150
25
Yard Flooding (1 per lot)
Address:
10
5
0
1 1 2 Roadway Flooding (allocate 1 lot per 250' of roadway
impacted & 2 lots per intersection impacted)
Emergency Access restricted (>12" water over only access
route to habitable structure), pts per structure
Address:
200
100
15
Traffic obstruction (> 6" of water) on arterial street
Address:
50
25
4
Traffic obstruction (> 6" of water) on collector street
Address:
25
12
2
Traffic obstruction (> 6" of water) on residential street
Address:
10
5
1.2. EROSION
1.2.1. Threatening Structure
(Ratio=Height of bank / distance from structure)
Habitable structures, residential (1 lot per structure)
Address: 2042 Bella Clare, 10085 Bon Oak, 10064 Green
Valley, 10067 Green Valley, 10064 Pepper, 10067 Pepper,
10067 Winkler, 10068 Winkler, 10073 14rnkler
Misc structures including pools, patio/decks, sheds, tennis
courts, detached garages, etc.(1 lot per structure)
Address: 10078 Ventura
300
150
J
0
z
3
200
100
J
Z
4
50
25
In
J
0
z
2
1800
150
Industrial, office, commercial and warehouse
(1 lot per structure)
Address:
300
200
50
1.2.2. No. of lots (from 1.2.1) on outside of bend
8
lots
10 points per lot
80
1.2.3. Threatening Roadway (allocate 1 lot per 250' of roadway
impacted & 2 lots per intersection impacted)
Arterial Road:
Address:
0
O
G
n
75
J
0
z
50
.8
0
J
z°
12
2
J
Collector Road:
Address:
35
25
6
Residential Road:
Address:
20
12
3
10/01/06 1 of 3
MSD Stormwater Projects Prioritization System
Revised Benefit Points Allocation Schedule
PROJECT NAME: Dellwood Creek Storm Channel (MCDW-150)
CONTINUED:
2.0 STORM SEWER 1 OVERLAND FLOW
Z
0
0
0
J
u-
N
DATE: 7/7/2009
PROBLEM SOLVED CATEGORY, CONT.
Note: Problem points are awarded only for those problems solved by the
proposed solution.
Chronic
(<=2-Yr)
Flooding
Frequent
(>2<=15-Yr)
Flooding
Infrequent
(>15-Yr)
Flooding
Total Points
Q L.
m
a_ G]
.0a
0'
Z Q
Points per
Category
Z S
c_ m
ti U
No. Lots I
Affected
2.1.1. Structure Flooding
Habitable 1st floor, residential; includes spaces with
mechanical equipment (1 lot per structure)'"
Address:
350
250
65
Basement (1 lot per structure)*
Address:
250
200
50
Industrial, office, commercial and warehouse
(1 lot per 2,500 sf of floor space flooded)*
Address: .
300
200
50
* If there is an existing public system and points are taken for
arty of the 3 items above, add 50 points.
Existing System YIN
Attached Garage (1 lot per structure)
Address:
100
75
25
Misc. structures including patio/decks, pools, sheds, tennis
courts, detached garages, etc.(1 lot per structure)
Address:
50
35
12
Yard Flooding (1 per lot)
Address:
10
6
0
.'1.2. Roadway Flooding (allocate 1 lot per 250' of roadway
impacted & 2 lots per intersection impacted)
Emergency Access restricted (>12" water over only access
route to habitable structure), pts per structure
Address:
200
150
25
Traffic obstruction (> 6" of water) on arterial street
Address:
50
35
6
Traffic obstruction (> 6" of water) on collector street
Address:
25
15
2
Traffic obstruction (> 6" of water) on residential street
Address:
10
6
1
Ponding (per pending area)
Address:
No. Ponds:
Points/pond:
5
2.2. Moderate Risk Erosion of misc. structures
Address:
No. Lots:
Points/lot:
20
2.3. Yard Erosion (1 per lot)
Address:
No. Lots:
Points/lot:
10
2.4. Age of Existing System
Points for Age
>50 yrs
(30 pts)
26-50 yrs
(15 pts)
<25 yrs
(0 pts)
Note: Problem points are awarded only for those problems solved by the proposed solution.
TOTAL PROBLEM POINTS
2030
10/01/06 2 of 3
MSD Stormwater Projects Prioritization System
Revised Benefit Points Allocation Schedule
PROJECT NAME: Dellwood Creek Storm Channel (MCDW-150)
CONTINUED:
DATE: 7/7/2009
SOLUTION BENEFIT CATEGORY
J
a
QO
CI 5
3.1. Reduction of flowrate leaving site
% reduction of
peak
flowrate :
Max points:
1000
3.2. Combines smaller projects into regional solution (see note)
No. Add'I
Projects:
Points per
Add'I Proj.:
50
4.0 ENVIRONMENTAL I WATER QUALITY
4.1. Addresses pollutants:
No. Units
Points per Unit
Bioswales
PER 100 LF
10
Forebays
AC
200
Wet Ponds
AC
100
Wetlands
AC
50
Biostabilization of banks (per bank)
2.07
PER 100 LF
10
21
Riffle Pool Complex
PER 100 LF
10
4.2. Eliminates combined sewer (per project)
EA
100
Eliminates inflow into sanitary system (1 each per basement
4.3. flooded, yard vent overtopped, street inlet or driveway drain
connected to sanitary/combined system, etc.)
EA
10
5.1. Ease of Implementation (No. of Easements)
Points for Easements
5.2. Recreational/Educational
Yes = 100,
no = 0 pts
TOTAL SOLUTION POINTS
21
TOTAL BENEFIT POINTS
2051
Note: A regional solution combines several smaller projects into a watershed or subwatershed solution.
TOTAL COST IN THOUSANDS=
BENEFIT! COST RATIO= TOTAL POINTS! TOTAL COST IN THOUSANDS=
Place "X" in one box below:
n
MSD Project
Project by Others
1404
1A6
10/01/06 3of3
MSD Stormwater Projects Prioritization System
Revised Benefit Points Allocation Schedule
PROJECT NAME: Hillsdale Dr. #7501 Storm Sewer (11063)
PROBLEM SOLVED CATEGORY
Note: Problem points are awarded only for those problems solved by the proposed solution.
1.0 STREAM
1.1. FLOODING
1.2. EROSION
1.1.1. Structure Flooding
Habitable 1st floor, residential; includes spaces with
mechanical equipment (1 lot per structure)
Address:
Basement (1 lot per structure)
Address:
Attached Garage (1 lot per structure)
Address:
Misc. structures including patio/decks, pools, sheds, tennis
courts, detached garages, etc.(1 lot per structure)
Address:
industrial, office, commercial and warehouse
(1 lot per 2,500 sf of floor space flooded)
Address:
Yard Flooding (1 per lot)
Address:
1.1.2. Roadway Flooding (allocate 1 lot per 250' of roadway
impacted & 2 lots per intersection impacted)
Emergency Access restricted (>12" water over only access
route to habitable structure), pts per structure
Address. -
Traffic
obstruction (> 6" of water) on arterial street
Address:
Chronic
(<=2-Yr)
Flooding
Frequent
(>2c=15-Yr)
Flooding
DATE: 4/17/2015
Infrequent
(>15-Yr)
Flooding
300
200
100
50
300
10
200
50
OQ�Q
Z Q
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00
150
100
50
25
150
5
100
25
z
25
15
8
4
25
0
15
4
z Q
Traffic obstruction (> 6" of water) on collector street
Address:
Traffic obstruction (> 6" of water) on residential street
Address:
1.2.1. Threatening Structure
(Ratio=Height of bank / distance from structure)
Habitable structures, residential (1 lot per structure)
Address:
Misc structures including pools, patio/decks, sheds, tennis
courts, detached garages, etc.(1 lot per structure)
Address:
Industrial, office, commercial and warehouse
(1 lot per structure)
Address:
1.2.2. No. of lots (from 1.2.1) on outside of bend
1.2.3. Threatening Roadway (allocate 1 lot per 250' of roadway
impacted & 2 lots per intersection impacted)
Arterial Road:
Address:
Collector Road:
Address:
Residential Road:
Address:
25
10
300
150
300
0
a
go
n
75
35
20
lots
12
5
200
100
200
50
25
12
3
0
z
2
1
o_
8
cn
o
50
25
50
10 points per lot
Cop
3
d
12
6
3
21
3
0
z
2p
3
0
z
10/01/06
1 of 3
MSD Stormwater Projects Prioritization System
Revised Benefit Points Allocation Schedule
PROJECT NAME: Hillsdale Dr. #7501 Storm Sewer (11063)
CONTINUED:
2.0 STORM SEWER I OVERLAND FLOW
2.1. FLOODING
DATE: 4/17/2015
Chronic
(<=2-Yr)
Flooding
Frequent
(>2r_15-Yr)
Flooding
infrequent
(>15-Yr)
Flooding
'
rr�
.o
PROBLEM SOLVED CATEGORY, CONT.
Note: Problem points are awarded only for those problems solved by the
proposed solution.
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Z Q
a
12
2.1.1. Structure Flooding
Habitable 1st floor, residential; includes spaces with
mechanical equipment (1 lot per structure)*
Address:
350
250
65
Basement (1 lot per structure)*
Address:7501 Hillsdale
250
200
1
50
200
industrial, office, commercial and warehouse
(1 lot per 2,500 sr of floor space flooded)*
Address:
300
200
50
* If there is an existing public system and points are taken for
any of the 3 items above, add 50 points.
Existing System YIN
Yes
50
Attached Garage (1 lot per structure)
Address:
100 75
25
Misc. structures including patio/decks, pools, sheds, tennis•
courts, aetacnea garages, etc.(1 lot per structure)
Address:
Yard Flooding (1 per lot)
Address:7505 Hillsdale
2.1.2. Roadway Flooding (allocate 1 lot per 250' of roadway
impacted & 2 lots per intersection impacted)
Emergency Access restricted (>12" water over only access
route to habitable structure), pts per structure
Address:
50
10
200
35
6
150
1
12
0
25
6
Traffic obstruction (> 6" of water) on arterial street
Address:
50
35
6
Traffic obstruction (> 6" of water) on collector street
Address:
25
15
2
Traffic obstruction (> 6" of water) on residential street
Address:
10
6
1
Ponding (per ponding area)
Address:
2.2. Moderate Risk Erosion of misc. structures
Address:
No. Ponds:
Points/pond:
5
No. Lots:
Points/lot:
20
2.3. Yard Erosion (1 per lot)
Address:
2.4. Age of Existing System
Points for Age
No. Lots:
>50 yrs
(30 pts)
30
Points/lot
26-50 yrs
(15 pts)
10
<25 yrs
(0 pts)
30
Note: Problem points are awarded only for those problems solved by the proposed solution.
TOTAL PROBLEM POINTS
286
10/01/06
2 of 3
MSD Stormwater Projects Prioritization System
Revised Benefit Points Allocation Schedule
PROJECT NAME: Hillsdale Dr. #7501 Storm Sewer (11063)
CONTINUED:
DATE: 4/17/2015
SOLUTION BENEFIT CATEGORY
J
Z3.1.
o
Reduction of flowrate leaving site
% reduction of
peak
flowrate :
Max points:
1000
co 5
W
Ui
No. Add'I
3.2. Combines smaller projects into regional solution (see note) Projects:
Points per -
Add! Proj.:
50
J
a
I
4.1. Addresses pollutants:
No. Units
Points per Unit
Bioswales
PER 100 LF
10
Forebays
AC
200
Wet Ponds
AC
100
Wetlands
AC
50
Biostabilization of banks (per bank)
PER 100 LF
10
Riffle Pool Complex
PER 100 LF
10
4.2. Eliminates combined sewer (per project)
EA
100
Eliminates inflow into sanitary system (1 each per basement
4.3. flooded, yard vent overtopped, street inlet or driveway drain
connected to sanitary/combined system, etc.)
1
EA
10
10
N
5.1. Ease of Implementation (No. of Easements)
0
0
0 a
2
0
u)
n
Points for Easements
10
10
5.2. Recreational/Educational
Yes = 100,
no=0pts
TOTAL SOLUTION POINTS
20
TOTAL BENEFIT POINTS
306
Note: A regional solution combines several smaller projects into a watershed or subwatershed solution.
TOTAL COST IN THOUSANDS=
BENEFIT/ COST RATIO= TOTAL POINTS/ TOTAL COST IN THOUSANDS=
Place "X" In one box below:
MSD Project
Project by Others
$220
1.39
10/01/06 3 of 3
MSD Stormwater Projects Prioritization System
Revised Benefit Points Allocation Schedule
PROJECT NAME: Longford Dr. #1851 DATE: 6/17/2009
PROBLEM SOLVED CATEGORY
Note: Problem points are awarded only for those problems solved by the proposed solution.
1.0 STREAM
0
Z
0
O
tL
T
1.1.1. Structure Flooding
Chronic
(<=2-Yr)
Flooding
Frequent
(>2<=15-Yr)
Flooding
Infrequent
(>15-Yr)
Flooding
a 0
C co
o_
2D
J t
o
Z <
2 D
J
Z
k3 'a
J t
Z <
a
0`
a
3
H
Habitable 1st floor, residential; includes spaces with
mechanical equipment (1 lot per structure)
Address:
300
150
25
Basement (1 lot per structure)
Address:
200
100
15
Attached Garage (1 lot per structure)
Address:
100
50
8
Misc. structures including patio/decks, pools, sheds, tennis
courts, detached garages, etc.(1 lot per structure)
Address:
50
25
4
Industrial, office, commercial and warehouse
(1 lot per 2,500 sf of floor space flooded)
Address:
300
150
25
Yard Flooding (1 per lot)
Address:
10
5
0
Roadway Flooding (allocate 1 lot per 250' of roadway
1.1.2. impacted & 2 lots per intersection impacted)
Emergency Access restricted (>12" water over only access
route to habitable structure), pts per structure -• •
Address:
200
100
15
Traffic obstruction (> 6" of water) on arterial street
Address:
50
25
4
Traffic obstruction (> 6" of water) on collector street
Address:
25
12
2
Traffic obstruction (> 6" of water) on residential street
Address:
10
5
1
1.2. EROSION
1.2.1. Threatening Structure
(Ratio=Height of bank / distance from structure)
Habitable structures, residential (1 lot per structure)
Address:
300
J
O
z
200
50
Misc structures including pools, patio/decks, sheds, tennis
courts, detached garages, etc.(1 lot per structure)
Address:
150
100
25
Industrial, office, commercial and warehouse
(1 lot per structure)
Address:
300
200
50
1.2.2. No. of lots (from 1.2.1) on outside of bend
lots
10 points per lot
1.2.3. Threatening Roadway (allocate 1 lot per 250' of roadway
impacted & 2 lots per intersection impacted)
Arterial Road:
Address:
75
J
O
z
0
o
o
• f co
0
50
a
J
Z
0
Lo
ro
O
• • u1
i
12
0
J
O
z
Collector Road:
Address:
35
Residential Road:
Address:
20
25
6
12
3
10/01/06
1 of 3
MSD Stormwater Projects Prioritization System
Revised Benefit Points Allocation Schedule
PROJECT NAME: Longford Dr. #1851
CONTINUED:
DATE: 6/17/2009
2.0 STORM SEWER 1 OVERLAND FLOW
2.1. FLOODING
PROBLEM SOLVED CATEGORY, CONT.
Note: Problem points are awarded only for those problems solved by the
proposed solution.
2.1.1. Structure Flooding
Chronic
(<=2-Yr)
Flooding
Frequent
(>2<=15-Yr)
Flooding
Infrequent
(>15-Yr)
Flooding
!3 m
J i
Z
o.
C 0)
rs
a0
to
N
J -6
Z
C OD
t0
a,
0
Z
Habitable 1st floor, residential; includes spaces with
mechanical equipment (1 lot per structure)*
Address:
350
250
65
Basement (1 lot per structure)*
Address:
250
200
50
Industrial, office, commercial and warehouse
(1 lot per 2,500 sf of floor space flooded)*
Address:
300
200
50
* If there is an existing public system and points are taken for
any of the 3 items above, add 50 points.
Existing System Y/N
Attached Garage (1 lot per structure)
Address:
100
75
25
Misc. structures including patio/decks, pools, sheds, tennis
courts, detached garages, etc.(1 lot per structure)
Address:
50
35
12
Yard Flooding (1 per lot)
Address: 1847 Longford, 1851 Longford
2.1.2. Roadway Flooding (allocate 1 lot per 250' of roadway
impacted & 2 lots per intersection impacted)
Emergency Access restricted (>12" water over only access
route to habitable structure), pts per structure
Address:
10
200
2
6
150
0
25
20
Traffic obstruction (> 6" of water) on arterial street
Address:
50
35
6
Traffic obstruction (> 6" of water) on collector street
Address:
25
15
2
Traffic obstruction (> 6" of water) on residential street
Address:
10
6
1
Ponding (per ponding area)
Address:
No. Ponds:
Points/pond:
5
2.2. Moderate Risk Erosion of misc. structures
Address:
No. Lots:
Points/lot:
20
2.3. Yard Erosion (1 per lot)
Address:
No. Lots:
Points/lot:
10
2.4. Age of Existing System
Points for Age
>50 yrs
(30 pts)
26-50 yrs
(15 pts)
<25 yrs
(0 pts)
Note: Problem points are awarded only for those problems solved by the proposed solution.
TOTAL PROBLEM POINTS
20
10/01/06
2 of 3
MSD Stormwater Projects Prioritization System
Revised Benefit Points Allocation Schedule
PROJECT NAME: Longford Dr. #1851
CONTINUED:
DATE: 6/17/2009
SOLUTION BENEFIT CATEGORY
3.1. Reduction of flowrate leaving site
3.2. Combines smaller projects into regional solution (see note)
% reduction of
peak
flowrate :
No. Add'I
Projects:
Max points:
Points per
Add'I Proj.:
1000
50
4.1. Addresses pollutants:
No. Units
Points per Unit
Bioswales
PER 100 LF
10
Forebays
AC
200
Wet Ponds
AC
100
Wetlands
AC
50
Biostabilization of banks (per bank)
PER 100 LF
10
Riffle Pool Complex
PER 100 LF
10
4.2. Eliminates combined sewer (per project)
EA
100
Eliminates inflow into sanitary system (1 each per basement
4.3. flooded, yard vent overtopped, street inlet or driveway drain
connected to sanitary/combined system, etc.)
EA
10
co
2
U)
5.1. Ease of Implementation (No. of Easements)
a
0
A
Points for Easements
20
20
5.2. Recreational/Educational
Yes = 100,
no = 0 pts
TOTAL SOLUTION POINTS
20
TOTAL BENEFIT POINTS
40
Note: A regional solution combines several smaller projects into a watershed orsubwatershed solution.
TOTAL COST IN THOUSANDS=
BENEFIT! COST RATIO= TOTAL POINTS! TOTAL COST IN THOUSANDS=
Place "X" in one box below:
MSD Project
Project by Others
29
1.38
10/01/06
3 of 3