Comments on proposed portable cement plant | Letter

Dear Mr. Dodd,

First, let me state the process and applications with respect to the portable concrete batch plant are less than clear and lacking sufficient and timely notice for public review. These matters concern many because of potential impact on islanders and wildlife. For instance, why would the County accept the 4/26/24 Conditional Use Permit with address “Unkown” when toggling the Assessor’s Polaris map identifies it as #213 Salt Spring Drive; and, CUP application is for upper lot only? Note: SEPA application is for both -09 & -08 parcels; i.e., #181 & #213 Salt Spring Drive.

Second, water. Estimates do not agree. If the Park is allocated 7.9 acre/ft/year, 12 gallons per minute is 145% greater – see 3b1.

7.9acres/year x 325,851g/a = 2.7 million g/y / 365days/y = 7,053g/d / 24h/d

= 294g/hour / 60m/h = 4.897gallons/minute

v. 12GPM x 60m/h = 720g/d x 24h/d = 17,280g/d x 365d/y = 6,307,200g/y

Or, 6.3 million – 2.57 million = 3.73 million; 3.73/2.57 = 145% over.

The SEPA applicant fails to distinguish overall Park use from the batch plant’s, 1.68 acres being a small percentage of land relative to the Park’s current and future buildout. Water supply is problematic in the neighborhood. Well driller Al Mauldin sagely advised and installed a 3,000 gallon storage tank for our future home. He drilled a new deeper well for Nesting Place neighbors quite recently when theirs failed. Measure current water levels at the Park and nearby wells to establish a baseline for the water table; and, require flow meters for the Park’s wellhead and an individual one for the batch plant with independent evaluation at regular intervals.

With respect to stormwater, please clarify what the turbidity meter is (3e1), its exact location, who will monitor it and how often. As proposed mitigation measures are “None” (3e) for runoff and “untreated cement process water is harmful to fish if discharged to surface water”(7a), establish mitigation measures because storm water “drains through a culvert under Beaverton Valley Rd., into Beaverton Valley”(3a1) via a retention pond (3c1): operator error and accidents happen and wetlands are precious and irreplaceable.

While “No fish” is listed on site (5a), a seasonal stream runs through our property, our daughter’s and eventually connects with a designated fish stream outflowing in False Bay. The batch plant sits atop the Park. As water runs downhill toward the SW corner wetlands and toward Beaverton Valley, any contaminants will travel with the water. Please verify that the proposed pH controller and CO2 injector are wildlife-friendly (7a).

Third, we value quiet. Almost forty species* of birds were identified in about an hour at Leeward this past weekend. Children play nearby and catch the school bus on Beaverton Valley Road. Traffic estimates of ten concrete trucks round trip/day (14e) do not include material deliveries and staff – 2-6 workers (8i). Are existing roads built to withstand heavy truck traffic? Is there room to cycle or walk safely along the verge? The island’s third batch plant might be more compatible elsewhere for the health and safety of residents, fish and wildlife.

Respectfully Submitted,

Gay Wilmerding