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Water resources in the Blackstone River basin, Massachusetts

Open-File Report 83-700

Prepared in cooperation with the Commonwealth of Massachusetts Water Resources Commission
By:
and

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Abstract

The Blackstone River heads in brooks 6 miles northwest of Worcester and drains about 330 square miles of central Massachusetts before crossing into Rhode Island at Woonsocket.


The primary source of the Worcester water supply is reservoirs, but for the remaining 23 communities in the basin, the primary source is wells.


Bedrock consists of granitic and metamorphic rocks. Till mantles the uplands and extends beneath stratified drift in the valleys. Stratified glacial drift, consisting of clay, silt, and fine sand deposited in lakes and coarse-textured sand and gravel deposited by streams, is found in lowlands and valleys.


The bedrock aquifer is capable of sustaining rural domestic supplies throughout the Blackstone River basin. Bedrock wells yield an average of 10 gallons per minute, but some wells, especially those in lowlands where bedrock probably contains more fractures and receives more recharge than in the upland areas, yield as much as 100 gallons per minute.


Glacial sand and gravel is the principal aquifer. It is capable of sustaining municipal supplies. Average daily pumpage from this aquifer in the Blackstone River basin was 10.4 million gallons per day in 1978. The median yield of large-diameter wells in the aquifer is 325 gallons per minute. The range of yields from these wells is 45 to 3,300 gallons per minute. The median specific capacity is about 30 gallons per minute per foot of drawdown.

Study Area

Additional Publication Details

Publication type:
Report
Publication Subtype:
USGS Numbered Series
Title:
Water resources in the Blackstone River basin, Massachusetts
Series title:
Open-File Report
Series number:
83-700
Year Published:
1983
Language:
English
Publisher:
U.S. Geological Survey
Description:
Report: 35 p.; 2 Plates: 29.0 x 21.38 inches and 41.38 x 33.62 inches
Country:
United States
State:
Massachusetts
City:
Worcester
Other Geospatial:
Blackstone River
Additional Online Files(Y/N):
Y