Bibliography on Vancouver Lake Watershed, including Burnt Bridge Creek, Flushing Channel, Lake River, and Salmon Creek
Entire Bibliography (.doc format)		Summary	Title Page and Acknowledgements		Timeline
Vancouver Lake	Burnt Bridge Creek	Salmon Creek	Lake River		Related Links
Bibliography 1900-50	Bibliography 1951-60	Bibliography 1961-70	Bibliography 1971-80	Bibliography 1981-90	Bibliography 1991-Present

Bibliography of Vancouver Lake watershed, including Burnt Bridge Creek, Flushing Channel, Lake River, and Salmon Creek

A history of restoration efforts for Vancouver Lake

Regional Planning Council of Clark County. 1976b. Burnt Bridge Creek drainage management study: Alternative Plans Summary Report (Product I) Including Initial Draft Outline of Final Report (Product K). Vancouver, WA: Kramer, Chin & Mayo; Water Resources Engineers, Inc.

PURPOSE: The purpose of this report is to present four physical alternative plans that have been formulated to manage surface runoff within the Burnt Bridge Creek basin.

The alternative plans presented here only encompass the trunk drainage facilities in the Burnt Bridge Creek drainage basin which consists of wetlands, ponds, streams, pipes, and roadside ditches that can accommodate peak flows of roughly 20 cubic feet per second (cfs) or greater.

The procedure followed was to first develop alternative plans, in conformance with the technical criteria presented herein, so that the 100-year runoff would be accommodated without flooding or stream erosion. The next step was to determine the pollutant loading associated with each alternative plan. Following an evaluation of the pollutant implications of the first alternative plan, trial adjustments were proposed and a second series of analyses were performed. This procedure was repeated until acceptable and/or reasonable results were achieved.

SUMMARY OF FINDINGS:

1. All alternative plans are hydraulically effective in accommodating runoff waters in the Burnt Bridge Creek basin.
2. Alternative Plans 2A and 4A result in the lowest average annual pollutant load to Vancouver Lake.
3. Alternative Plans 2A and 4A may have some adverse impacts upon groundwater quality.
4. Under existing conditions, direct runoff contributes the following percentages of the average annual pollutant load to Vancouver Lake:
   Settleable Solids 57%
   BOD 17%
   NO3 + NO2 + NH3 as N 3%
   Total Phosphorus 2%
5. Under future land use conditions and Alternative Plan 1, direct runoff contributions to the average annual pollutant load to Vancouver Lake will increase to the following percentages:
   Settleable Solids 92%
   BOD 65%
   NO3 + NO2 + NH3 as N 19%
   Total Phosphorus 20%
6. Direct runoff from individual storm events, under both existing and future conditions, will contribute pollutants in similar proportions to those for average annual loads.
7. Direct runoff from an individual storm event, under both existing and future conditions, could contribute up to 10 percent of the average annual pollutant load. However, under future conditions one storm event could wash pollutants into Vancouver Lake in an amount equal to roughly 50 percent of the total pollutant load generated under existing conditions.
8. Increased street sweeping could reduce the average annual pollutant load to Vancouver Lake by approximately 15 to 25 percent.
9. Alternative Plans for trunk facilities in the Burnt Bridge Creek basin are sized to accommodate direct runoff from the December 15-21, 1955, storm and the associated interflow and base flow. This seven day event generates greater runoff than would be experienced under a single 100-year rainfall event.
10. Runoff control for individual new developments, in contrast to trunk facilities, would require the retention or detention of 4 inches of water, which is based upon the 100-year rainfall.

 

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Last modified: April 27, 2010
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