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Archive for January, 2008

A 1997 MBTF document entitled “Project Proposal s.319
Nonpoint Source Pollution Competitive Grant Program” submitted by then NRC
Administrator Dan Monahan on behalf of the MBTF describes several activities in
which the MBTF is still involved today including:

1. Public education,

2. Installation of a stormwater treatment system
(Vortechnics),

3. Reliable water quality testing including acquisition of
testing instruments and conduct of baseline surveys,

4. Periodic inventories and surveys of wildlife, and plants
as well as macro invertebrates (animals without
a backbone) that live on the bottom of streams during all or part of their life
cycle),
Fish, birds, turtles, salamanders, newts, and frogs all feed on
macro invertebrates at different stages
of their life. In fact 80% of the diet of riparian birds consists of adults
insects that spend most of their life in the water as macro-invertebrates and
are a critical food source for trout.

5. Consideration of restocking of the Mill Brook with
trout.

The report includes results of a baseline survey of MB
Water quality.  Allan Schmidt entered
the reported data into a spreadsheet shown below for seven sites for each month
from April through November 1996. (n.b. Temperatures have been converted from C
to F and row and column averages have been computed).  The location of each of the seven data recording stations is not
specified in the report but NRC files include a map indicating that the MB
water sampling sites to be #1: Mill Brook Way, #2 : Chamberlain Park, #3 Heywood
Street, #4 Cambridge Turnpike, #5 Hawthorne Lane, #6 Crosby’s Pond, and #7
Fairyland Pond.

Additional sources of MB 1996 water quality have been
reported by SUASCO and the Mass Div. Of Fish and Wildlife  (MDFW): 
http://www.mass.gov/dep/water/resources/82wqar1.pdf

In July 1954 the MDFW sampled 3% of the MB stream area and
estimated there were 258 individual fish representing 10 species.  In 1979 the MDFW found 16 individuals representing
6 species.

Dan Monahan’s 1996 Proposal includes data concerning
Concord’s practice of trout stocking on a yearly basis from 1956-1990 when that
program was discontinued because “the introduced fish were not surviving prior
to that time”. “The area of greatest concern is downstream of Heywood
Street…”(p.13-14) Over 10,000 fish had been introduced in all. In 1994 Dan
Monahan found no signs of fish life within 100 feet of the Heywood Street
Bridge.

MDFW conducted fish population
sampling at one station in Mill Brook downstream of Heywood Road in Concord on
12 July 2001 using backpack-electroshocking equipment (Richards 2003a).  Six redfin pickerel, one white sucker, and
one American eel were collected. The white sucker is considered a fluvial
dependent species that is tolerant of pollution. The redfin pickerel and the
American eel are both considered macrohabitat generalists.

MDFW also sampled an unnamed
tributary to Mill Brook, upstream from Lexington Road, Concord, on 13 July
2001. Fifteen yellow perch, three redfin pickerel, and one largemouth bass were
collected.

MDWM conducted RBP II surveys in Mill Brook in 1996 at two
stations- SAC01A, upstream from the Concord Police station behind the Concord
Ice Company, and SAC01B, upstream from Lowell Road, adjacent to the Star Market
parking lot (Appendix H). 

 “During the next round of sampling (expected in 2006) DWM should
conduct water quality sampling in Mill Brook to assess the Aquatic Life Use.
The plan should also determine if water withdrawals are impacting habitat in
the brook. Benthic macroinvertebrate sampling should be considered for this
segment, but this could prove difficult since the 1996 Technical Memorandum
indicated few sites suitable for sampling (Appendix H).  At the very least, a habitat quality survey
should be conducted to determine if habitat quality has improved or
deteriorated. Additionally, bacteria samples from Mill Brook should also be
collected to assess the recreational uses.”  


Mill
Brook Water Temp F 1996                                                  `    

Site#/Mo      Apr      May      Jun      Jul      Aug      Sep      Oct      Nov      Avg/Yr      Location

1     43.3      51.6      65.5      64.9      64.4      56.1      53.1      38.7      54.7      Mill
Brook Way

2     43.0      51.1      64.9      63.9      64.0      56.1      52.5      38.5      54.3      Chamberlain
Park

3     42.6      50.5      65.7      63.3      63.1      56.1      52.0      37.9      53.9      Heywood
Street

4     41.9      52.2      68.2      65.7      65.7      56.1      52.0      37.8      54.9      Cambridge
Tpke

5     43.3      51.8      68.2      64.9      65.8      56.1      52.3      36.5      54.9      Hawthorne
Lane

6     44.8      58.8      74.7      71.4      70.7      56.1      52.5      38.8      58.5      Crosby’s
Pond

7     46.2      56.7      76.6      73.8      70.3      56.5      53.6      40.3      59.2      Fairyland
Pond

Avg/Site      43.6      53.2      69.1      66.8      66.3      56.2      52.6      38.4      55.8 

Mill
Brook Air Temp C 1996                                                       

Site#/Mo      Apr      May      Jun      Jul      Aug      Sep      Oct      Nov      Avg/Yr     

1     4.9      10.1      21.1      19.4      18.5      13.6      9.4      3      12.5 

2     5.9      12      21.8      21.3      18.4      13      9.4      2.8      13.1 

3     5.7      11.4      21.8      18.9      19      13.4      9.4      1      12.6 

4     6.9      10.5      21.2      23.2      19.1      14.4      8.3      0.5      13.0 

5     7.1      13      22.6      20.3      19.8      14.1      7.2      0      13.0

6     7.9      13.9      21.6      21.7      19.5      14.4      9.4      0.5      13.6

7     8.4      13.1      21.6      21.8      19.3      13.6      10.5      1      13.7

Avg/Site      6.7      12.0      21.7      20.9      19.1      13.8      9.1      1.3      13.1

Mill
Brook Air Temp F 1996                                                 

Site#/Mo      Apr      May      Jun      Jul      Aug      Sep      Oct      Nov      Avg/Yr

1     40.8      50.2      70.0      66.9      65.3      56.5      48.9      37.4      54.5

2     42.6      53.6      71.2      70.3      65.1      55.4      48.9      37.0      55.5

3     42.3      52.5      71.2      66.0      66.2      56.1      48.9      33.8      54.6

4     44.4      50.9      70.2      73.8      66.4      57.9      46.9      32.9      55.4

5     44.8      55.4      72.7      68.5      67.6      57.4      45.0      32.0      55.4

6     46.2      57.0      70.9      71.1      67.1      57.9      48.9      32.9      56.5

7     47.1      55.6      70.9      71.2      66.7      56.5      50.9      33.8      56.6

Avg/Site      44.0      53.6      71.0      69.7      66.4      56.8      48.4      34.3      55.5

Mill
Brook Water Height Inches 1996                                                

Site#/Mo      Apr      May      Jun      Jul      Aug      Sep      Oct      Nov      Avg/Yr

1     9.0      35.0      38.0      39.0      41.0      16.0      38.0      35.0      31.4

2     30.5      37.5      42.0      39.0      41.0      30.0      40.0      47.0      38.4

3     63.0      75.5      78.0      76.5      79.0      58.0      76.0      73.0      72.4

4     18.5      30.8      35.0      30.5      36.0      9.0      27.0      25.0      26.5

5     38.0      45.0      54.0      51.5      54.0      35.0      51.0      47.0      46.9

6     14.0      14.0      15.0      15.0      16.0      13.0      15.0      16.0      14.8

7     6.0      3.5      2.0      2.0      3.0      3.0      3.0      6.0      3.6

Avg/Site      25.6      34.5      37.7      36.2      38.6      23.4      35.7      35.6      33.4

Mill
Brook Disolved Oxygen Mg/L 1996                                                 

Site#/Mo      Apr      May      Jun      Jul      Aug      Sep      Oct      Nov      Avg/Yr

1     8.5      9.1      6.6      6.6      7      6.5      7.4      9.3      7.6

2     7.8      8.6      6.1      6.3      6.3      5      6.4      9      6.9

3     7.3      8.3      5.7      5.8      6.3      4.4      5.6      8.1      6.4

4     7      5.5      4      4.4      4.5      3.3      3.6      6.2      4.8

5     7.8      8.1      5.3      5.5      5.8      5      4.3      7.1      6.1

6     10.7      9      4.2      2.7      2.1      6.9      3.5      6.1      5.7

7     11      10      5.9      5.5      4.2      6.5      8.2      6.4      7.2

Avg/Site      8.6      8.4      5.4      5.3      5.2      5.4      5.6      7.5      6.4

Mill
Brook Conductivity nS/cm 1996                                                 

Site#/Mo      Apr      May      Jun      Jul      Aug      Sep      Oct      Nov      Avg/Yr

1     291      415      467      387      492      187      400      430      383.6

2     290      410      440      370      448      179      407      432      372.0

3     282      388      420      355      415      181      400      411      356.5

4     280      432      529      389      526      180      440      436      401.5

5     350      435      521      418      574      210      480      476      433.0

6     255      218      282      140      301      145      240      273      231.8

7     346      384      404      301      411      310      420      448      378.0

Avg/Site      299.1      383.1      437.6      337.1      452.4      198.9      398.1      415.1      365.2

Mill
Brook pH 1996                                                    

Site#/Mo      Apr      May      Jun      Jul      Aug      Sep      Oct      Nov      Avg/Yr

1     6.6      7.1      6.9      6.8      7.5      8.0      7.0      6.8      7.1

2     6.7      7.0      6.9      6.8      7.5      7.9      7.0      6.7      7.1

3     6.7      7.0      6.9      6.8      7.4      7.6      7.0      6.7      7.0

4     6.7      6.9      6.8      6.7      7.1      7.6      7.0      6.7      6.9

5     6.8      7.0      6.9      6.8      7.1      7.6      6.8      6.6      6.9

6     6.9      6.9      6.9      6.7      7.3      7.8      6.8      6.7      7.0

7     6.8      6.9      6.9      6.7      7.3      7.5      7.0      6.7      7.0

Avg/Site      6.7      7.0      6.9      6.8      7.3      7.7      6.9      6.7      7.0

Mill
Brook Coliforms colonies/100mL 1996                                                    

Site#/Mo      Apr      May      Jun      Jul      Aug      Sep      Oct      Nov      Avg/Yr

1     15      100      490      33      260      TNTC      80      no
data  163.0

2     101      710      280      33      120      TNTC      110      no
data  225.7

3     10      100      380      29      110      TNTC      10      no
data  106.5

4     5      50      620      37      90      TNTC      10      no
data  135.3

5     75      10      220      6      520      TNTC      20      no
data  141.8

6     12      0      0      0      10      1100      10      no
data  161.7

7     0      0      0      2      30      300      0      no
data  47.4

Avg/Site      31.1      138.6      284.3      20.0      162.9      700.0      34.3        140.2

Mill
Brook Phosphorous mg/L 1996                                                  

Site#/Mo      Apr      May      Jun      Jul      Aug      Sep      Oct      Nov      Avg/Yr

1     0.25      0.11      0.10      0.23      0.08      0.20      0.14      0.17      0.16

2     0.16      0.10      0.11      0.13      0.07      0.18      0.14      0.13      0.13

3     0.18      0.08      0.15      0.15      0.10      0.18      0.10      0.15      0.14

4     0.18      0.08      0.12      0.16      0.12      0.20      0.14      0.15      0.14

5     0.18      0.09      0.10      0.13      0.10      0.20      0.20      0.15      0.14

6     0.14      0.07      0.11      0.13      0.10      0.11      0.13      0.15      0.12

7     0.11      0.06      0.10      0.10      0.06      0.10      0.09      0.10      0.09

Avg/Site      0.17      0.08      0.11      0.15      0.09      0.17      0.13      0.14      0.13

Mill
Brook Turbidity FTU 1996                                                   

Site#/Mo      Apr      May      Jun      Jul      Aug      Sep      Oct      Nov      Avg/Yr

1     13      no
data  13      15      19      22      10      10      14.6

2     13      no
data  12      15      20      22      13      10      15.0

3     13      no
data  14      15      20      22      13      9      15.1

4     13      no
data  19      29      24      21      16      11      19.0

5     13      no
data  14      17      23      21      18      10      16.6

6     8      no
data  12      15      23      11      10      5      12.0

7     5      no
data  8      4      3      5      5      5      5.0

Avg/Site            11.1                 13.1            15.7            18.9            17.7            12.1            8.6            13.9

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