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on Crombie Pond. All of the homeowners were invited to participate in VBWD's residual floodproofing program, but only two homeowners on Lake Jane took part in the program. One resident constructed a berm and installed a sump pump, while the other resident had the house raised. Therefore, five homes are still within the 100-year flood plain of Lake Jane, Deer Pond and Crombie Pond. The 100-year flood elevation of Deer Pond is 926.7, and the 100-year flood elevation of Crombie Pond is 924.9. 4.2.9.3 VBWD Water Ouantity Management -Goals VBWD will periodically monitor the pond water levels in the Fox Fire Estates/Springborn's Green Acres area. If water levels appear to be on a long-term upward trend and discharge to Lake Jane appears possible, VBWD will determine if water quality treatment measures should be taken. VBWD will continue to monitor Lake Jane water levels and provide the information to the DNR. 4.2.9.4 Water Oualitv and DNR Data The DNR currently manages Lake Jane for largemouth bass, bluegill, and crappie. The lakes native fish population reproduced well in the past, and continues to reproduce well. For this reason, stocking has not occurred since 1977, and no stocking is planned for the future. The lake was stocked with northern pike during 1976 and 1977. In 1986, the DNR began a 12-16 inch slot size limit on largemouth bass to control bluegill abundance in Lake Jane. The DNR held public meetings during the fall of 1993 to determine whether the slot size limit should be continued. The DNR dropped the slot size limits for Lake Jane. Instead, the DNR plans to initiate a catch and release regulation for Lake Jane in 1996 in an effort to increase the bass population and improve the bluegill population. Before construction of VBWD's Project 1007, the majority of the nutrient loading to Lake Jane appeared to be from infrequent Lake Olson overflows and inundation of septic systems. Overflow from Lake Olson may have occurred in the early decades of this century, according to local reports. Recorded overflows from Lake Olson began in 1975 and occurred almost every year through 1987. Water quality data have been collected from Lake Jane on a regular basis since 1971. VBWD collected water quality data during 1971, 1972, 1979, and 1990, The Metropolitan Council collected data in 1984, 1986, 1987, and 1991. The Tri-Lakes Association collected samples during 1975, 1977, 1978 and 1985. A citizen volunteer has collected Secchi disc transparency data from the lake each summer since 1973 as a part of the Citizen Lake Monitoring Program. The average summer total phosphorus, chlorophyll a, and Secchi disc transparency data are summarized in Figure 4-13. Thermal stratification of the lake has been observed at depths of about 20 feet. The water quality of Lake Jane has historically been characterized by high transparency and relatively low concentrations of algae. The lake's long term average growing season phosphorus concentration of 0.028 mg/L is lower than most of the other lakes in this region (MPCA, 1990). Despite its relatively good water quality, however, the lake's algal population increases from the early summer period to the late summer period. As shown in Figure 4-4, Secchi disc transparency ranges from four to six meters during the early summer period. The high water 23\82\045\SEC4.RPT\KMH 31 DRAFT: June 23, 1994