treasure valley road dust study: final report - ResearchGate
treasure valley road dust study: final report - ResearchGate
treasure valley road dust study: final report - ResearchGate
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Table 2-3. Silt Content and Silt Loading from Winter Road Samples in Ada and Canyon Counties<br />
Location<br />
County Road Type<br />
Sample<br />
Date<br />
Area<br />
(m 2 )<br />
Sample<br />
Weight<br />
(g)<br />
Silt<br />
(g)<br />
Silt<br />
content<br />
(%)<br />
Silt<br />
Loading<br />
(g/m 2 )<br />
Front St. Between 3rd and<br />
5th<br />
Ada Arterial 3/4/2001 71.2 907 169 22 2.8<br />
Maple Grove North of<br />
Tillamook<br />
Ada Arterial 3/6/2001 92.7 554 151 36 2.1<br />
Garrity Blvd. Between<br />
Cavalry and 11th<br />
Canyon Arterial 3/7/2001 97.3 977 79 9.0 0.9<br />
Riva Ridge North of Reutzel<br />
Dr.<br />
Ada Collector 3/1/2001 37.2 2601 24 0.9 0.7<br />
13th St. North of Hays Ada Collector 3/4/2001 69.7 521 73 18 1.3<br />
Amity Between Colorado and<br />
Canyon<br />
Diamond<br />
Collector 3/7/2001 36.7 602 180 40 6.6<br />
Apple St. Between Wright<br />
and LaFayette<br />
Ada Local 3/3/2001 30.2 619 114 23 4.7<br />
West Park Dr. West of<br />
Milwaukee<br />
Ada Local 3/6/2001 49.5 709 56 9.5 1.4<br />
6th St. Between 6th Avenue<br />
and 7th Ave<br />
Canyon Local 3/7/2001 63.2 4342 181 8.6 5.9<br />
Howry Ada Unpaved 3/6/2001 4.2 3823 43 1.1<br />
Cloverdale Farm Road Ada Unpaved 3/17/2001 4.2 1595 33 2.1<br />
Pierce Park Ada Unpaved 3/16/2001 4.2 969 7.7 0.8<br />
Unpaved Driveway Off<br />
Happy Valley<br />
Canyon Unpaved 3/7/2001 4.2 1447 23 1.6<br />
De-icing<br />
Ada County Highway District Ada Material, TC 3/8/2001 N/A 2213 6.5 0.3<br />
Sand<br />
Table 2-4. Summary of Winter Silt Measurements by County<br />
Road Type<br />
County<br />
Average<br />
Silt %<br />
Standard<br />
Deviation<br />
Silt %<br />
Average<br />
Silt<br />
Loading<br />
(g/m 2 )<br />
Standard<br />
Deviation<br />
Silt<br />
Loading<br />
(g/m 2 )<br />
Arterial Ada 29 9.7 2.5 0.5<br />
Arterial Canyon 9.0 N/A 0.9 N/A<br />
Arterial Ada & Canyon 22 13 1.9 1.0<br />
Collector Ada 9.3 12 1.0 0.5<br />
Collector Canyon 40 N/A 6.6 N/A<br />
Collector Ada & Canyon 20 20 2.9 3.3<br />
Local Ada 16 9.4 3.0 2.4<br />
Local Canyon 8.6 N/A 5.9 N/A<br />
Local Ada & Canyon 14 8.0 4.0 2.3<br />
Unpaved Ada 1.3 0.7 N/A N/A<br />
Unpaved Canyon 1.6 N/A N/A N/A<br />
Unpaved Ada & Canyon 1.4 0.6<br />
2-6