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					                                                        McIntosh Lake
                                       FISH SURVEY AND MANAGEMENT DATA
                                        Benjamin Swigle - Aquatic Biologist (Fort Collins/Boulder)
                                                 ben.swigle@state.co.us / 970-472-4364
 General Information: McIntosh Lake (265 surface acres) is a storage reservoir owned by the McIntosh
 Reservoir Company with the surface rights leased by the city of Longmont. Shore angling and limited boat
 access (see regulations) are allowed. Anglers can expect to catch carp, catfish, walleye, and crappie.
 More Information: http://www.ci.longmont.co.us/parks/fishing/index.htm
 Location: Northwest Longmont south of HWY 66 between 75th street and Hover Road.
 Recreational Management: City of Longmont
 Purchase a Fishing License: http://wildlife.state.co.us/ShopDOW/AppsAndLicenses/
 Fishery Management: Warmwater angling

            Amenities                               Previous Stocking                        Sportfishing Notes
 Public Parks (2)                                        2012                                    Crappie
 Picnic Facilities                                   Black Crappie                   Fish the dam when water
 Primitive Restrooms                                Channel Catfish                  temps are 48-65°F.
 Hiking Trails                                          Walleye                      Minnows or small rapalas are
 Wildlife Viewing                                                                    good baits.
                                                            2011
            Regulations                                 Black Crappie                         Channel Catfish
 Lake Hours - one hour before                         Channel Catfish                Best baits are chicken livers,
 sunset until one hour after                             White Bass                   night crawlers, and 1” rapalas.
 sunset.                                                   Walleye                    No particular location.
 Watercraft: carry-on, non-
 motorized boats only. This                                2010                                   Walleye
 includes canoes, kayaks, belly-                          Walleye                     Most walleye sampled were
 boats, sailboats and other small                                                     found along the south shore
 boats. This does not include                              2009                       which is open to public bank
 inner tubes.                                          Black Crappie                  fishing.
 Launching access is at                                  Walleye
 designated boat ramps only.
 No ice fishing.                                          2008
                                                       Black Crappie

                                                           2007
                                                       Black Crappie




                                                        McIntosh Lake
                                       FISH SURVEY AND MANAGEMENT DATA
                                        Benjamin Swigle - Aquatic Biologist (Fort Collins/Boulder)
                                                 ben.swigle@state.co.us / 970-472-4364
                                        # Caught (2012)             Average Length
                     Species                                                                   Average Weight (lbs)
                                             4 nets                 (Range) Inches
Black Bullhead                                 5                         7.9 (6-9)                       0.29
Black Crappie                                 13                        7.5 (3-10)                       0.25
Bluegill                                       4                         5.2 (4-6)                       0.12
Channel Catfish                               48                       17.6 (14-24)                      1.99
Common Carp                                   50                       15.2 (11-25)                      1.22
Gizzard Shad                                  52                       14.5 (7-18)                       1.48
Green Sunfish                                  2                         4.5 (3-6)                       0.10
Largemouth Bass                                5                        8.4 (7-11)                       0.35
Smallmouth Bass                               13                        9.1 (6-13)                       0.40
Walleye                                       89                       14.5 (9-19)                       0.84
White Bass                                     7                        9.0 ((8-10)                      0.39
White Sucker                                   1                           15.7                          1.60
Yellow Perch                                   3                         6.0 (6-7)                       0.11

                                        # Caught (2011)             Average Length
                     Species                                                                   Average Weight (lbs)
                                             6 nets                 (Range) Inches
Black Bullhead                                10                       8.3 (7 - 10)                      0.35
Black Crappie                                 37                       8.0 (4 - 12)                      0.33
Channel Catfish                               28                      16.3 (7 - 21)                      1.76
Common Carp                                   16                      13.6 (4 - 17)                      1.22
Gizzard Shad                                  40                     15.5 (14 - 17)                      1.44
Largemouth Bass                                8                     9.0 (6.5 - 13.7)                    0.50
Smallmouth Bass                               12                       9.4 (6 -12)                       0.46
Walleye                                       150                     12.7 (6 - 24)                      0.80
White Bass                                    13                        5.7 (5 - 8)                      0.10
White Sucker                                   1                           15.4                          1.50
Yellow Perch                                  10                       6.5 (5 - 11)                      0.15
Above: The complete summary of all fish sampled during 2011 (6 gillnets) and 2012 (4 gillnets). Based on
the results of the survey, fishing for catfish and walleye should be again be good during 2012. In the future
look for white bass numbers to expand as the year class of this species,
originally stocked in 2011, reaches sexually maturity this spring (2013).
Despite increased fishing pressure, walleye abundance remains high.
Although no size restrictions are in place at McIntosh, each angler may
only keep 5 walleye.


                       30
                                >15"
                       25
                                10-15"
  #Walleye per net




                                0-10"
                       20


                       15


                       10


                        5


                        0
                               2008             2009                2010                2011               2012



Future Management: The transformation of this fishery began in 2008 with the transfer of adult gizzard shad
from McCall’s pond to increase the forage base. Black crappie adult and fingerling black crappie have been
stocked to bolster the existing population. Walleye fry, stocked annually since 2009 have grown nicely.
Walleye, black crappie, and channel catfish will be stocked each year (low natural reproduction occurs) to
essentially maintain the current populations. Quite frankly, McIntosh Lake, has fundamentally reached its
potentially for a quality fishery. I simply hope to maintain this water and look forward to anglers learning and
hooking some good fish. The best crappie fishing will likely occur along the dam (using minnows) between
April 15 – June 1. A float tube or carry-on craft will improve success for landing walleye and white bass.

				
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