Water quality assessment of Governor Bond (Greenville New) Lake Bond County, Illinois : 1977-1982.

"IEPA/WPC/84-011." -- Cover.

Watershed monitoring for the Lake Decatur watershed, 2003-2006 /

"June 2008."

Environmental status of the Lake Michigan region /

Vols. 7, 9 and 15, issued in 1974, prepared for the U. S. Atomic Energy Commission; vols. issued 1975- prepared for the U. S. Energy Research and Development Administration.

Reconnaissance report for section 205 flood control project, North Lake, Waukesha County, Wisconsin /

"July 1982."

Waukegan area : Lake County /

"October 7, 1950."

Plan of athletic field showing grading and planting for the Oak Park and River Forest Township High School. [Oak Park, Illinois?] Revised December 1915

Pencil, red ink on tracing paper; plan and cross-sections; signed. 105x74 cm. Scale 1"=16' [from photographic copy by Lance Burgharrdt]

Detail for tennis courts and running track of the Oak Park and River Forest Township high school. [Oak Park, Illinois?]

Red, black ink on linen; signed. 46x42 cm. No scale. [from photographic copy by Lance Burgharrdt]

A plan showing the drainage and water supply for the athletic field for the Oak Park and River Forest Township high school. [Oak Park, Illinois?]

Red, black ink on linen; signed. 107x74 cm. Scale: 1"=16' [from photographic copy by Lance Burgharrdt]

Planting plan for Oak Park and River Forest Township high school. [Oak Park, Illinois?]

Pencil on tracing paper; location, type of plantings; at lower right, "C.E. del."; signed. 105x73 cm. Scale: 1"=16' [from photographic copy by Lance Burgharrdt]

Village of Oak Park, Ill. Park property. Oak Park, Illinois.

Ink on linen; outline of property bordered by Lake, Ridgeland, North Boulevard and Elmwood; signed. 73x63 cm. Scale: 1"=20' [from photographic copy by Lance Burgharrdt]

Village of Oak Park, Ill. Park property. Oak Park, Illinois.

Red, black ink on linen; topo. lines, elevations, trees, buildings delineated for property bounded by Grove, Ontario, Oak Park and Lake; signed. 92x74 cm. Scale: 1"=20' [from photographic copy by Lance Burgharrdt]

Park No. 2. Village of Oak Park, Ill. Park property. Drain and water plan. Oak Park, Illinois.

Ink, pencil on tracing paper; for area bounded by Lake, Ridgeland and Elmwood; signed. 56x52 cm. Scale: 1"=20' [from photographic copy by Lance Burgharrdt]

Proposed system of forest parks and country pleasure road

Black, green, blue ink on linen; map of Chicago and suburbs, with parks marked in green; signed; 130 x 71 cm; Scale: 1" = 1 mile [from photographic copy by Lance Burgharrdt]

River Forest park. District #2. Water system.

Pencil on tracing paper; location of pipes for entire park; bordered at top by Lake Ave., at left, by Keystone Ave; unsigned;; 98 x 60 cm.; No scale [from photographic copy by Lance Burgharrdt]

Radiocarbon ages and pollen record of a sediment core from Lake Lyadhej-To

An 1180-cm long core recovered from Lake Lyadhej-To (68°15'N, 65°45'E, 150 m a.s.l.) at the NW rim of the Polar Urals Mountains reflects the Holocene environmental history from ca. 11,000 cal. yr BP. Pollen assemblages from the diamicton (ca. 11,000-10,700 cal. yr BP) are dominated by Pre-Quaternary spores and redeposited Pinaceae pollen, pointing to a high terrestrial input. Turbid and nutrient-poor conditions existed in the lake ca. 10,700-10,550 cal. yr BP. The chironomid-inferred reconstructions suggest that mean July temperature increased rapidly from 10.0 to 11.8 °C during this period. Sparse, treeless vegetation dominated on the disturbed and denuded soils in the catchment area. A distinct dominance of planktonic diatoms ca. 10,500-8800 cal. yr BP points to the lowest lake-ice coverage, the longest growing season and the highest bioproductivity during the lake history. Birch forest with some shrub alder grew around the lake reflecting the warmest climate conditions during the Holocene. Mean July temperature was likely 11-13 °C and annual precipitation-400-500 mm. The period ca. 8800-5500 cal. yr BP is characterized by a gradual deterioration of environmental conditions in the lake and lake catchment. The pollen- and chironomid-inferred temperatures reflect a warm period (ca. 6500-6000 cal. BP) with a mean July temperature at least 1-2 °C higher than today. Birch forests disappeared from the lake vicinity after 6000 cal. yr BP. The vegetation in the Lyadhej-To region became similar to the modern one. Shrub (Betula nana, Salix) and herb tundra have dominated the lake catchment since ca. 5500 cal. yr BP. All proxies suggest rather harsh environmental conditions. Diatom assemblages reflect relatively short growing seasons and a longer persistence of lake-ice ca. 5500-2500 cal. yr BP. Pollen-based climate reconstructions suggest significant cooling between ca. 5500 and 3500 cal. yr BP with a mean July temperature 8-10 °C and annual precipitation-300-400 mm. The bioproductivity in the lake remained low after 2500 cal. yr BP, but biogeochemical proxies reflect a higher terrestrial influx. Changes in the diatom content may indicate warmer water temperatures and a reduced ice cover on the lake. However, chironomid-based reconstructions reflect a period with minimal temperatures during the lake history.