november 14, 2012 presented by jill winton. background
TRANSCRIPT
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FORGE POND DAMFish Passage Improvement
Feasibility Study and Preliminary DesignJones River, Kingston, MA
November 14, 2012
Presented By Jill Winton
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BACKGROUND
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JONES RIVER BASIN
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PROJECT GOALS
• Document existing flow conditions and water supply management
• Conduct new analyses to forecast the feasibility of providing fish passage at Forge Pond Dam under different scenarios of flow management and structural modifications
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FORGE POND
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SILVER LAKE NATURAL OUTLET
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FORGE POND DAM
Spillway
Walkway atop
3 stoplog bays
Access road atop
3 culvert openings
Forge Pond
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FORGE POND DAM
38 ft El. 47.6 ftEl. 47.9 ft
El. 46.1 ft
El. 43.9 ft
El. 49.3 ftEach 4.3 ft
3.4 ft 6.3 ft5.8 ft 5.8 ft
Lake St culvert(4.5-ft diameter)
SpillwayWalkway atop 3 stoplog bays
Acce
ss ro
ad a
top
3 cu
lver
t ope
ning
s
Note: Not to scale.
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LAKE STREET CULVERT & ACCESS ROAD
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FISHERY RESOURCES
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TARGET SPECIES – River Herring
Blueback herringAlosa aestivalis
AlewifeAlosa pseudoharengus
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OTHER SPECIES
American eelAnguilla rostrata
Under review as a threatened species under ESA
Tidewater mucketLeptodea ochracea
Eastern pondmussel Lagumia nasuta
FRESHWATER MUSSELS
Species of Special Concern in MA
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HABITAT REQUIREMENTS
Parameter Units Sample Size Acceptable Criteria Exceedence Classification
Temperature (nursery) °C 53 ≤ 28.3 2% Suitable
Temperature (spawning) °C 37 ≤ 26.0 0% Suitable
Dissolved oxygen mg/L 75 ≥ 5.0 11% Impaired
pH SU 90 6.5 to ≤ 8.3 38% Impaired
Secchi disk depth m 23 ≥ 2.0 0% Suitable
Total Nitrogen mg/L 7 ≤ 0.32 71% Impaired
Total Phosphorous μg/L 7 ≤ 8.0 29% Impaired
Eutrophication N/A 12 BPJ 0% -
Fish Passage N/A 12 BPJ 100% Impaired
Stream Flow N/A 12 BPJ 83% Impaired
Preliminary Summary of River Herring Habitat Assessment at Silver Lake (2008-09)
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PASSAGE REQUIREMENTS –Depth
Targets for herring:
ADULTS•8-12 inches•MIN 6 inches
JUVENILES•4-8 inches•MIN 2 inches
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PASSAGE REQUIREMENTS –Velocity
0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
16 33 49 66 82 98
Perc
enta
ge A
scen
ding
Distance (ft)
1.6 ft/sec3.3 ft/sec4.9 ft/sec6.6 ft/sec8.2 ft/sec9.8 ft/sec11.5 ft/sec
Passage Success Rates for Alewife under Varying Velocities and Distances
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PASSAGE REQUIREMENTS –Flow Timing
MAR APR MAY JUN JUL AUG SEP OCT NOV DEC
adultsupstreammigration
juvenilesdownstreamemigration
elversupstreammigration
silver eelsdownstreamemigration
Species Life Stage EventMonth
River herring
American eel
Timing of Important Life Cycle Events for Target Species
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WATER SUPPLY OPERATIONS
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SILVER LAKE WATER SUPPLY SYSTEMSummary of Brockton Water Supply Sources
*Increases annually up to 4.07 mgd. Not included in totals.**110 of systemwide safe yield via a 1995 DEP ACO.
SourceRegistered
or Permitted Withdrawal (mgd)
Required Downstream
Release
Silver LakeNONE
to Jones River
Monponsett Pond0.9 mgd
to Stump Brookwhen diversion is on
Furnace Pond0.3 mgd
to Herring Brookwhen diversion is on
Brockton Reservoir 0.83 NONE
Aquaria desalinization plant up to 4.07* N/A
Hubbard Avenue Well 0.04 N/A
TOTAL 11.98
Administrative ConsentOrder Limit**
11.3
11.11
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SILVER LAKE LEVEL – Average
43.0
43.5
44.0
44.5
45.0
45.5
46.0
46.5
47.0
47.5
48.0
1-Jan 1-Feb 1-Mar 1-Apr 1-May 1-Jun 1-Jul 1-Aug 1-Sep 1-Oct 1-Nov 1-Dec
Silv
er L
ake
Elev
. (ft
, NG
VD 2
9)
Silver Lake Elev. (ft, NGVD 29)Forge Pond Dam Spillway Elev. (47.6 ft, NGVD 29)Silver Lake Berm Elev. (45.9 ft, NGVD 29)
When Silver Lake elevation drops below the natural outlet, it has been observed that water flows from Forge Pond intoSilver Lake resulting from groundwater flow into Forge Pond.
When the Forge Pond waterlevel exceeds the spillway crest, water is passed to Jones River.
Spawning adults immigrating
Juveniles rearing
Juveniles emigrating
Period of Record: 1996 - 2012
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SILVER LAKE LEVEL – 2011 with Diversions
0
10
20
30
40
50
60
70
80
90
40
41
42
43
44
45
46
47
48
49
1-Jan 1-Feb 1-Mar 1-Apr 1-May 1-Jun 1-Jul 1-Aug 1-Sep 1-Oct 1-Nov 1-Dec
Div
ersi
ons
to S
ilver
Lak
e (M
GD
)
Silv
er L
ake
Elev
. (ft
, NG
VD
29)
2011
Silver Lake Elev. (ft, NGVD 29)Forge Pond Dam Spillway Elev. (47.6 ft, NGVD 29)Silver Lake Outlet Elev. (approx. 46 ft, NGVD 29)Diversions from Monponsett Pond (MGD)Diversions from Furnace Pond (MGD)
Spawning adults immigrating
Juveniles rearing
Juveniles emigrating
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SILVER LAKE LEVEL – Duration Curves
40
41
42
43
44
45
46
47
48
49
0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100%
Silv
er L
ake
Elev
. (ft
, NG
VD
29)
Percent of Time Silver Lake Elevation is Equaled or Exceeded
April Silver Lake ElevationMay Silver Lake ElevationJune Silver Lake ElevationForge Pond Dam Spillway Elev. (47.6 ft, NGVD 29)Silver Lake Berm Elev. (45.9 ft, NGVD 29)
Period of Record: 1996 - 2012
40
41
42
43
44
45
46
47
48
49
0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100%
Silv
er L
ake
Elev
. (ft
, NG
VD
29)
Percent of Time Silver Lake Elevation is Equaled or Exceeded
July Silver Lake ElevationAugust Silver Lake ElevationSeptember Silver Lake ElevationForge Pond Dam Spillway Elev. (47.6 ft, NGVD 29)Silver Lake Berm Elev. (45.9 ft, NGVD 29)
Period of Record: 1996 - 2012
Spring Immigration
Fall Emigration
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AQUARIA PLANT – Cost Analysis
$-
$5
$10
$15
$20
$25
$30
$35
$40
$45
$50
0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5
Ove
rall
Ann
ual C
ost
(dol
lars
per
tho
usan
d ga
llons
)
Amount of water Purchased from Aquaria (million gallons per day)
Brockton (2009) reported average 0.35 MG = $47/1000 gal
2012 Firm Commitment 3.5 MG = $5.82/1000 gal
Chart maximum0.1 MG = $162/1000 gal
Overall Cost of Aquaria Water per Amount Purchased by Brockton (2012 example)
Fixed Rate = $167,480 per 0.1 mgd (total annual cost of $5,861,800 for 2012 for 3.5 MGD)
Variable Rate = $1.23 per 1,000 gallons used
Excess Rate = $0.60 per 1,000 gallons used
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FISH PASSAGE ALATERNATIVES
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FISH LADDER – Alaska Steeppass
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FISH LADDER – Plan View
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FISH LADDER – Detail View
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NATURE-LIKE BYPASS CHANNEL
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NATURE-LIKE BYPASS CHANNEL
42
44
46
48
50
52
0 50 100 150 200 250 300
Elev
ation
(ft
)
Distance (ft)
Upstreaminvert = 46.2' (Silver Lake
outlet invert )
Bypass channel finshed grade (slope = 1.3%)
Downstream invert = 42.4'
(channel invert U/S of Lake St)
Approximate access road location
Existing ground topography
(to be graded)
Elevation Profile of Potential Bypass Channel
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DAM REMOVAL
CONSIDERATIONS• Water Supply• Sediment• Infrastructure• Wetlands• Historical
Resources• etc.
Former Wapping Road Dam
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DAM REMOVAL – Modeling Approach
5000 5500 6000
40
42
44
46
48
50
Main Channel Distance (ft)
Ele
vatio
n (
ft)
Legend
WS 21.3 cfs
WS 3.15 cfs
WS 0.016 cfs
Ground
LAK
E S
T
AC
CE
SS
RD
NA
TU
RA
L O
UT
LET
Jones River Upper
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NEXT STEPS
• Required flows for each alternative• Feasibility of flow availability• Budgetary cost estimates• Selection of preferred alternative• Conceptual designs
LATER PHASES• Detailed designs• Permitting• Implementation• Monitoring
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QUESTIONS?