Okay, I need to create a concise summary of the Redwood Creek Cover Structure Project from the 1996 final report. Let me start by reading through the provided text carefully to understand the key points.
First, the project was part of the 1995/1996 Fishery Restoration Grants Program under the California Department of Fish and Game's Inland Fisheries Division. The contract number is FG 5050 IF. The work was completed in 13 working days from June 26 to August 6, 1996. The total person hours were 195, and heavy equipment hours were 35. The total cost was $6,533.00.
The project location is ten stream miles upstream of the Highway 299 bridge over Redwood Creek in eastern Humboldt County, specifically in Section 7, Township 6 North, Range 4 East. It's on the Maple Creek 7-1/2 Minute Quadrangle Map. They contracted to design and construct 4 LWD (log-deposit) cover structures, but five were completed. The trees used were live ones donated by Mr. Massei, felled into the stream channel to increase habitat complexity over a half-mile reach.
Upstream and downstream projects were also done. Most of the deepest pools and areas without habitat complexity in a two-mile reach of upper Redwood Creek on Mr. Massei's property were improved.
The procedure involved using trees from the slopes adjacent to the site. Seven trees, 26 to 42 inches in diameter and 100 feet tall, were used. They were careful to use trees from upslope or dense clumps to avoid daylighting the creek. Before placement, three of the five sites had pools excavated with a backhoe. All sites had large boulders or bedrock for anchoring.
Site #1 and #4 used Hilti anchored cables to pod boulders together, creating weighted masses. The structures were built to withstand 6000+ CFS flows. Except for Site #4, all trees were left full length. They were arranged as "digger logs" angling down from the banks. The tops plunged into pools, and trunks rested on boulders, bedrock, or were anchored to trees.
For rock to log anchors, 3/4 inch cable was attached to 1 inch threaded rebar through drilled holes. Two structures were anchored to stumps with 3/4 inch cable leashes, then to boulders or bedrock near the wetted channel with Hilti cables and rebar anchors.
I need to make sure the summary is detailed but concise. Start with the main project details: who, what, when, where, and the key outcomes. Mention the contract number, dates, costs, and the location specifics. Then explain the purpose (habitat complexity), the materials used (trees from Massei), the number of structures, and the methods of construction. Highlight the anchoring techniques and the flow resistance. Also note the upstream and downstream projects and the overall impact on the creek's habitat. Avoid any markdown and keep it in English. Check for any numbers or terms that need to be included, like the 195 person hours, 35 heavy equipment hours, $6,533 cost, and the specific measurements for trees and cables. Make sure to mention the use of Hilti anchors and the different types of structures at each site. Also, note that the project was part of a larger restoration effort. Keep it all in one paragraph without any extra information. Let me structure this step by step to ensure all key points are covered without being too verbose.
The 1996 Redwood Creek Cover Structure Project, funded by the California Department of Fish and Game's Inland Fisheries Division under Contract # FG 5050 IF, was completed in 13 working days (June 26–August 6, 1996) with 195 person hours and 35 heavy equipment hours, costing $6,533.00. Located ten stream miles upstream of the Highway 299 bridge in eastern Humboldt County, the project involved constructing five log-deposit (LWD) cover structures using live trees donated by Mr. Massei, felled into the stream channel to enhance habitat complexity over a half-mile reach of Redwood Creek. Structures were anchored to existing boulders or bedrock with 3/4-inch Hilti cables and 1-inch threaded rebar, with Site #1 and #4 using "podded" boulders for added weight. Trees were arranged as "digger logs," angled downward to stabilize pools, with trunks resting on boulders, bedrock, or anchored to trees. Two additional cover projects upstream and downstream improved pools and habitat in a two-mile reach of upper Redwood Creek. All structures were designed to withstand 6000+ CFS flows, ensuring durability and minimizing creek exposure.
